WO1996011369A1 - Air-conditioner - Google Patents

Abstract

This invention aims at reducing the sound, which occurs in a dehumidification restriction unit during a dehumidification operation, of a flow of a refrigerant in an air-conditioner capable of carrying out a dehumidification operation while preventing a decrease in the room temperature by, especially, a refrigerating cycle. A user-side heat exchanger (3) is divided into two, and a dehumidification restriction unit (7) used during a dehumidification operation is provided therebetween, to form a refrigerating cycle. A dehumidification restriction unit (7) is formed by providing a main refrigerant passage (27) comprising a clearance between a valve rod (34) and a valve seat (36), and an auxiliary refrigerant passage (25) connecting together a high pressure side refrigerant passage (32) and a low pressure side refrigerant passage (28), a part of which auxiliary refrigerant passage (25) is provided in a valve rod (34) by utilizing the same. This enables the sound of flow of a refrigerant, which occurs when a refrigerant current flowing into a restriction portion of the dehumification restriction unit is a two-phase current, i.e. a gas-liquid phase current, to be reduced during a dehumidification operation.

Description

 Harm

 Air conditioner

Technical field

 The present invention relates to an air conditioner capable of performing a dehumidification operation that performs dehumidification while preventing a decrease in room temperature by using a refrigeration cycle, and is particularly suitable for reducing refrigerant flow noise generated by a dehumidification expansion device during a dehumidification operation. Related to air conditioners. Background art

 As a conventional example of an air conditioner that performs a dehumidifying operation in a refrigeration cycle, there is one disclosed in Japanese Patent Application Laid-Open No. 2-187377. In this conventional air conditioner, a compressor, an outdoor heat exchanger, a throttle device, an indoor heat exchanger, and the like are sequentially connected by refrigerant piping, and the indoor heat exchanger is divided into two parts. Discloses a cycle configuration in which a dehumidifying expansion device for dehumidifying operation is thrown. During the dehumidification operation, the refrigerant flows into the dehumidification expansion device, so that the upstream side of the two-part indoor heat exchanger is used as the evaporator, the downstream side is used as the evaporator, and the evaporator is used as the evaporator. It cools and dehumidifies and heats it with a coke oven to enable a dehumidifying operation that lowers the humidity without significantly lowering the temperature blown out of the air conditioner. Also disclosed is a two-way valve structure with a small hole that uses a small hole provided in the movable part of the two-way valve as the dehumidifying throttle device S.

By the way, in general, a large refrigerant flow noise, which is a continuous sound or a discontinuous sound, is generated in the expansion device in accordance with the expansion operation, and the magnitude of the refrigerant flow noise, particularly the discontinuous sound, is generated by the expansion device. It is greatly influenced by the flow mode of the high-pressure refrigerant flowing in. In particular, it is known that the refrigerant flow noise becomes very loud when a slag flow or a plug flow occurs in which shell-shaped bubbles and liquid appear alternately in a two-phase flow state of gas and liquid. Here, the continuous flow noise is mainly caused by the liquid refrigerant being decompressed and expanded at the throttle section of the expansion device to form a high-speed gas-liquid two-phase jet. Discontinuous flow noise is mainly due to pressure The gas refrigerant and the liquid refrigerant, which is an incompressible fluid, are caused by large pressure fluctuations that occur when they alternately pass through the narrow flow path of the expansion device. A conventional example aimed at reducing such refrigerant flow noise is disclosed in Japanese Patent Publication No. 57-129371. This conventional example relates to a reduction in refrigerant flow noise in a throttling device provided between an outdoor heat exchanger and a room-to-heat exchanger used in a cooling operation or a heating operation, and an expansion valve which is a throttling device g. A fixed orifice is provided on the upstream side (high pressure side) to increase the number of air bubbles in the refrigerant when passing through the expansion valve, and to make the distribution uniform to reduce the noise level.

 In the refrigerating cycle described in Japanese Patent Application Laid-Open No. 2-187367, during the dehumidification operation, the chamber that acts as a condenser upstream of the dehumidification expansion device and the outlet of the heat exchanger have a gas-liquid two-phase outlet. In this state, loud refrigerant flow noise is generated at the dehumidifying expansion device. Since the dehumidifying squeezing device S is provided on the room 內 side, it gives a feeling of discomfort to a person in the living space. To solve this problem, noise reduction has conventionally been attempted by providing damping material and sound insulation material. However, recently, the demand for comfort has become extremely high, and noise has also been required to be further reduced.

A configuration in which an orifice is provided on the upstream side of the aperture device fi as in the aperture device S described in Japanese Patent Application Laid-Open No. 57-1293291 is disclosed in In the cooling or heating operation, the orifice acts as a flow resistance of the refrigerant flow, causing performance degradation when applied to the dehumidifying expansion device of the refrigeration cycle that performs the dehumidification operation disclosed in the bulletin There is a problem. An object of the present invention is to provide an air conditioner capable of a dehumidifying operation in which dehumidification is performed while preventing a decrease in room temperature by a refrigeration cycle, and to prevent a decrease in performance in a cooling operation or a heating operation, and to perform a dehumidifying expansion device during a dehumidifying operation. An object of the present invention is to provide an air conditioner capable of reducing the refrigerant flow noise generated in the air conditioner. Disclosure of the invention

 In order to achieve the above object, an air conditioner of the present invention includes a pressure box machine, a heat source side heat exchanger, and a use side heat exchanger, and the child side heat exchanger is thermally divided into two. A dehumidifying throttle device used during the dehumidifying operation is provided between the two heat exchangers. During the dehumidifying operation, the upstream side of the use-side heat exchanger is a coagulator and the downstream side is an evaporator. In the air concentrator having a refrigeration cycle configured to perform dehumidification, the dehumidification expansion device includes a high-pressure side refrigerant flow path and a low-pressure side refrigerant flow path that are provided in the valve body and allow the refrigerant to flow. A valve port that penetrates the high-pressure side refrigerant flow path and an open port that communicates with the low-pressure side refrigerant flow path, and forms a main refrigerant passage connecting the valve port and the open port. Adjusting the refrigerant flow i passing through the main refrigerant passage connecting the valve port and the opening port. A valve stem that can reciprocate in the main refrigerant passage for changing the opening area of the refrigerant passage, separately from the main refrigerant passage, a high-pressure side refrigerant flow path and a low-pressure side refrigerant flow. And a dehumidification control valve having a sub-refrigerant passage that passes through the passage.

The heat exchanger further includes a compressor, a heat source-side heat exchanger, and a use-side heat exchanger, wherein the use-side heat exchanger is thermally divided into two parts. A dehumidifying expansion device used during dehumidification operation is provided, and a refrigeration cycle is configured so that during dehumidification operation, dehumidification is performed by using a condenser upstream of the utilization side heat exchanger and an evaporator downstream. In the air conditioner described above, the dehumidifying expansion device communicates with the high-pressure side refrigerant flow path, the low-pressure side refrigerant flow path, and the high-pressure side refrigerant flow path through which the refrigerant flows through the valve body. A valve port and an open port penetrating the low-pressure side refrigerant flow path, a main refrigerant passage connecting the valve port and the open port is formed, and connecting the valve port and the open port. Changing the opening area of the refrigerant passage to adjust the flow rate of the refrigerant passing through the main refrigerant passage A valve stem capable of reciprocating in the main refrigerant passage 內 for causing And a dehumidification control valve having an auxiliary refrigerant passage for allowing the refrigerant to flow from the high-pressure side refrigerant flow path to the low-pressure side refrigerant flow path through the valve stem and the valve body poorly. It is characterized by having.

 In addition, a pressure box machine, a heat source side heat exchanger, and a use side heat exchanger are provided, and the use side heat exchanger is thermally divided into two parts. In the meantime, a dehumidifying expansion device e used during dehumidification operation is inserted, and during dehumidification operation, dehumidification is performed by using a box box on the upstream side of the heat exchanger on the utilization side and an evaporator on the downstream side. In the air conditioner constituting a refrigeration cycle, the dehumidifying throttle device e is provided in the valve body and has a high-pressure side refrigerant flow path and a low-pressure side refrigerant flow path through which refrigerant flows, and the high-pressure side refrigerant flow path. A low-pressure side refrigerant flow path having a valve port and an open port through which a main refrigerant passage connecting the valve port and the open port is formed, and the valve port and the open port. In order to adjust the flow rate of the refrigerant passing through the main refrigerant passage connecting the port, the opening area of the refrigerant passage is changed. And a sub-refrigerant passage for allowing the refrigerant to flow from the high-pressure refrigerant passage to the low-pressure refrigerant passage in the valve stem. The special dehumidification control valve is provided as a special hinoki.

 Further, the sub-refrigerant passage of the dehumidification control valve is configured such that an inlet hole on the high-pressure side refrigerant flow path side is provided at an upper end of the high-pressure side refrigerant flow path.

With the above configuration, the following operation is performed. Since the air conditioner is configured as described above, in the dehumidification control valve used as the dehumidification expansion device, the gap between the main refrigerant passage connecting the valve port and the opening port, that is, the gap between the valve rod and the valve seat. In addition to the above, a sub-refrigerant passage that penetrates through the valve stem and the valve body and allows the refrigerant to flow through the high-pressure side refrigerant flow path and the low-pressure side refrigerant flow path is provided. It can be diverted. As a result, the refrigerant flow rate can be differentiated, Since the momentum and kinetic energy of the fluid decrease, the exciting force of the fluid is reduced, and the refrigerant flow noise generated when the refrigerant flow passes through the valve of the dehumidifying expansion device is reduced.

 In the sub-refrigerant passage of the dehumidification control valve, an inlet hole on the low-pressure side refrigerant flow path is provided at the upper end of the high-pressure side refrigerant flow path, and the main refrigerant passage is located at the lower end of the high-pressure side refrigerant flow path. When the refrigerant flows into the dehumidification control valve in a gas-liquid two-phase state, it has a gas-liquid separation function, so that liquid refrigerant flows through the main refrigerant passage and gas refrigerant flows through the sub-refrigerant passage. Since a refrigerant passage can be secured, it is possible to prevent gas from flowing into the throttle portion in a gas-liquid two-phase state. As a result, it is possible to reduce the refrigerant flow noise generated due to the refrigerant gas-liquid two-phase flow. In the sub-refrigerant passage of the dehumidification control valve, the flow path is discontinuously changed in shape, so that the pressure is reduced stepwise and the flow path is made maze, so that the kinetic energy of the refrigerant flow is reduced. Since the heat is dissipated and the excitation force can be reduced, the flow noise of the refrigerant can be reduced.

BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a configuration diagram of a freezing cycle using a dehumidification control valve having two refrigerant passages according to one embodiment of the present invention.

 FIG. 2 is a longitudinal sectional view showing a dehumidifying expansion device using the dehumidifying control valve having two refrigerant passages of the present embodiment.

 FIG. 3 is a longitudinal sectional view showing a dehumidifying expansion device using a dehumidifying control valve having two refrigerant passages and a gas-liquid separation function of the present embodiment.

 FIG. 4 is a longitudinal sectional view showing a dehumidification expansion device using the dehumidification control valve having two refrigerant passages of the present embodiment.

 FIG. 5 is a longitudinal sectional view showing a dehumidifying expansion device using a dehumidifying control valve having two refrigerant passages according to the present embodiment.

FIG. 6 shows a throttling device used in a cooling and heating operation according to another embodiment of the present invention. FIG. 3 is a configuration diagram of a refrigeration cycle using a dehumidification control valve.

BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5 assuming an air conditioner to be attached to a building. FIG. 1 is a diagram showing a configuration of a refrigeration cycle of the present embodiment, FIG. 2 is a longitudinal sectional view showing a structure of a dehumidification control valve which performs a throttling operation during a dehumidification operation of a dehumidification expansion device 7 of the present embodiment, and FIG. FIG. 4 is a longitudinal sectional view showing a structure of a dehumidification control valve having a gas-liquid separation function, FIG. 4 is a longitudinal sectional view showing a dehumidification throttle device S using a dehumidification control valve having two refrigerant passages, and FIG. It is a longitudinal section showing a dehumidification expansion device using a dehumidification control valve which has a passage.

 As shown in FIG. 1, the air conditioner of this embodiment includes a pressure box machine 1, a four-way valve 2 for switching operation states such as a cooling operation and a heating operation, an outdoor heat exchanger 3, and a cooling operation and a heating operation. The main throttle device S 4 through which the refrigerant flows at the time, the two-way valve 5 that is provided in parallel with the main throttle device S 4 and allows the refrigerant to flow during the dehumidifying operation, the indoor heat exchangers 6 a and 6 b divided into two, and the indoor heat exchanger To the dehumidification control valve 7, which is a dehumidification throttle device S provided in series with these components between 6a and 6b, to the accumulator 8 to prevent liquid from returning to the compressor 1, and to the outdoor heat exchanger 3. It consists of an outdoor fan 9 for blowing air, an indoor fan 10 for blowing air to the indoor heat exchangers 6a and 6b, and the like.

In FIG. 2, the valve body 23 is formed integrally with a valve seat 36 having a valve port 31 and an open port 30, and a valve rod 34 and a valve rod 34 positioned therein. The valve body 3 5 attached to the valve stem 3 4, the electromagnetic coil 20 for driving the valve body 35, the suction element 21 for sucking the valve body 35, and the valve body 35 3 Consists of springs 22 pressed against the 1 side. When the electromagnetic coil 20 is energized, a magnetic force is generated in the attraction element 21, and the valve stem 34 is provided due to the balance between the spring force of the spring 22 and the attraction force of the attraction element 21. The valve body 35 moves up and down the valve body 23 內. Move this valve body 3 5 As a result, the valve stem 34 moves up and down between the valve seats 36, and the throttle amount changes. At this time, it is set so that the valve rod 34 can be removed from the valve seat 36 and the main refrigerant passage 27 can be opened.

 During the dehumidification operation, the refrigerant flows from the inlet pipe 33 of the dehumidification control valve into the refrigerant passage 32 on the high pressure side, passes through the two refrigerant passages, flows into the refrigerant passage 28 on the low pressure side, and exits. Outflow from pipe 29. Here, the branched refrigerant passages are formed in the main refrigerant passage 27 formed by a gap between the valve rod 34 and the valve seat 36, the refrigerant passage 32 on the high pressure side, and the valve body 23. The refrigerant passage 25 provided in the valve rod 34 penetrates the refrigerant passage 25 passing through the space 24 and the space 2 formed in the valve body 23 and the refrigerant passage 28 on the low pressure side. 6 is a sub refrigerant passage. The space 24 formed in the valve body 23 may use a gap such as a moving mechanism or may form a flow path in the valve body 23.

The dehumidification control valve shown in FIG. 3 has the same basic configuration as the dehumidification control valve shown in FIG. 2, but the inlet 37 of the sub-refrigerant passage is provided at the upper end of the refrigerant passage 32 on the high pressure side. Have been. Therefore, when refrigerant flows into the dehumidification control valve in a gas-liquid two-phase flow, gas refrigerant 38 flows to the upper layer and liquid refrigerant 39 flows ⁵ to the lower layer in general except for vertical piping. As a result, a liquid refrigerant 39 flows through the sub-refrigerant passage 25, and a gas refrigerant 38 flows through the sub-refrigerant passage 25. At this time, the valve port 31 as an inlet of the main refrigerant passage 27 is provided at a lower end side of the high-pressure side refrigerant passage 32 facing the inlet 37 of the sub-refrigerant passage 25. It is desirable. Further, the gas-liquid separation function has a great effect when the inlet pipe 33 and at least the high-pressure side refrigerant flow path 32 are installed horizontally.

As shown in FIG. 4, in the dehumidification control valve shown in FIG. 2 or FIG. 3, the sub-refrigerant passage 25 provided to be connected to the high-pressure side refrigerant passage 32 is provided with a valve body 23. The clearance between the valve stem 34 and the valve stem 34 may be used. Configuration in this way Even in the same manner as described above, it can have the function of dividing the refrigerant flow and the function of separating gas and liquid.

 As described above, by configuring the cycle configuration as shown in Fig. 1 and the structure of the dehumidification control valve as shown in Fig. 2, 3, or 4, the following is achieved. Operate.

 During the cooling operation, the two-way valve 5 is closed and the dehumidifying expansion device 7 is opened. At this time, the opening surfaces of the valve stem and the valve seat of the dehumidification control valve operating as the dehumidification expansion device 7 are opened so that pressure loss is almost eliminated. As a result, as shown by the solid arrows in Fig. 1, the refrigerant flows from the compressor 1 to the four-way valve 2 to the outdoor heat exchanger 3 to the main expansion device 4—the indoor heat exchanger 6a—to the dehumidification expansion device. 7—Indoor heat exchanger 6 b → Four-way valve 2 — Accumulator 8 → Compressor 1 Circulate in this order, outdoor heat exchanger 3 as box box, and indoor heat exchangers 6a and 6b as evaporators. Cool. During the heating operation, the refrigerant is switched by switching the four-way valve 2 so that the refrigerant is compressed by the compressor 1 → the four-way valve 2 → the chamber / heat exchanger 6 b → the dehumidifying throttle device 7-the chamber / heat exchange as shown by the dashed arrow. 6a—Main throttling device 4 → outdoor heat exchanger 3 → four-way valve 2 → accumulator 8 ~ »circulator 1 in order, outdoor heat exchanger 3 evaporator, indoor heat exchanger 6a and 6 The room is heated using b as a box.

During the dehumidifying operation, the four-way valve 2 is switched as in the cooling operation, the two-way valve 5 is opened, and the dehumidifying expansion device 7 is closed. At this time, the valve rod 34 of the dehumidification control valve used as the dehumidification expansion device 7 is lowered to be located in the valve seat 36, and a main refrigerant passage 27 and a sub refrigerant passage 25 are formed. When passing through these two passages, pressure is reduced in each case. As a result, as shown by the dashed line in Fig. 1, the refrigerant flows from compressor 1 → four-way valve 2 to → outdoor heat exchanger 3 → two-way valve 5 → indoor heat exchanger 6 a-dehumidifying expansion device 7 → Indoor heat exchanger 6 b-Four-way valve 2 ~ → Accumulator 8 → Compressor 1 Circulates in this order, and the dehumidification control valve as dehumidification expansion device 7 restricts outdoor heat exchanger 3 Upstream condenser, room heat exchanger 6a is the downstream box and the indoor heat exchanger 6b is the evaporator. Then, the indoor heat exchanger 6b cools and dehumidifies the indoor air, and also heats the air with the indoor heat exchanger 6a. It can be carried out.

 In this case, by changing the box capacity in the outdoor heat exchanger 3 or the capacity of the compressor 1, the condensing capacity in the indoor heat exchanger 6a, that is, the amount of radiated heat is changed to change the indoor fan capacity. Thus, the temperature of the air blown out by the air conditioner 10 can be controlled over a wide range from a cooling tendency to a heating tendency. In addition, the indoor heat exchangers 6a and 6b may be arranged in front and rear, and the wind may flow from the indoor heat exchangers 6b to 6a by the indoor fan 10 or the indoor heat exchangers 10a may be arranged vertically. Therefore, the wind may flow in parallel to the indoor heat exchangers 6a and 6b.

Here, in the above dehumidifying operation, the refrigerant flow is in a gas-liquid two-phase state at the inlet of the dehumidifying expansion device 7, depending on the indoor and outdoor temperature and humidity conditions, the operating conditions of the pressure box machine fan, and the like. In some cases, the gas-liquid two-phase flow may be a slag flow or plug flow in which gun-shaped bubbles flow intermittently in the liquid flow. In addition, the flow may be a laminar flow or a wavy flow in which the upper part is a gas phase and the lower part is a two-phase, a yes phase. When the refrigerant flows into the dehumidifying expansion device 7 in such a gas-liquid two-phase flow state, if there is a portion of the flow where both gas and liquid phases intermittently flow, intermittent flow noise is generated there. However, this intermittent sound is a harsh sound. Further, since the dehumidifying squeezing device 7 is installed inside the room, it gives an unpleasant feeling to the person in the room. However, in the air conditioner of the present embodiment, even if the gas-liquid two-phase flow flows, the two refrigerant passages are formed. It can dissipate the momentum and kinetic energy that it has. In addition, by performing gas-liquid separation, it is possible to secure the flow path of the liquid refrigerant and prevent the restriction of the throttle by the gas phase. As a result, the refrigerant flow noise generated by the gas-liquid two-phase refrigerant flow can be reduced. In the dehumidification control valve shown in FIG. 5, the auxiliary refrigerant passage is provided only in the valve stem 34. This sub-refrigerant passage is composed of a horizontal hole 40 and a vertical hole 41. The refrigerant flow flowing from the lateral hole 40 changes the flow direction at right angles in the valve rod 34 and flows out from the longitudinal hole 41 to the refrigerant passage 28 on the low pressure side. At this time, by forming the horizontal hole 40 in the upper part of the refrigerant passage on the low pressure side, when the refrigerant flows in a gas-liquid two-phase, it can also have a gas-liquid separation function. Even in the case of using the dehumidification control valve having this structure, the momentum and kinetic energy serving as the exciting force due to the split flow of the refrigerant flow can be dissipated with respect to the gas-liquid two-phase refrigerant flow, as in the above-described embodiment. This has the effect of reducing flowing noise.

 Another embodiment of the present invention will be described with reference to FIG. FIG. 6 is a diagram showing the configuration of the refrigeration cycle of this embodiment.

 In this embodiment, instead of the main throttle device and two-way valve of the refrigeration cycle of the embodiment shown in FIG. 1, the dehumidification control valve shown in FIGS. 2 to 5 is replaced by an expansion valve 1 shown in FIG. 2 shows a frozen cycle when used. It is necessary to set the expansion valve 12 so as to have a throttling function during the cooling / heating operation, and it is necessary to set the expansion valve 12 so that there is almost no pressure loss during the dehumidifying operation. By using any of the dehumidification control valves shown in FIGS. 2 to 5 as the expansion valve 12, the function of the refrigeration cycle shown in FIG. Can be the same as the function. In addition, by using one of the dehumidification control valves shown in FIGS. 2 to 5 as the expansion valve 12, even if the refrigerant flows into the expansion valve 12 in a gaseous two-phase flow state, the expansion valve 12 The refrigerant flow noise generated in step 1 and 2 can be reduced.

In the present embodiment, the drive device for the valve stem of the dehumidification control valve is described as being composed of an electromagnetic coil, an attractor, and a spring. However, a device that uses a motor and is mechanically driven A pressure control method using a temperature sensor may be applied, and a driving method of various configurations may be applied. The valve may have a structure in which a valve rod moves through a valve seat 內, and may have a structure in which a main refrigerant passage and a sub-refrigerant passage are provided. In this embodiment, a part of the sub-refrigerant passage is provided in the valve rod. However, a passage (not shown) penetrating the high-pressure side refrigerant flow path and the low-pressure side refrigerant flow path may be provided in the valve body. Similarly, the refrigerant flow noise can be reduced.

 So far, the description has been given of a refrigeration cycle that can operate in three operation states: cooling, heating, and dehumidification. However, the present invention is not limited to this, and can be applied to other refrigeration cycles. For example, in the refrigeration cycle shown in FIG. 1 or FIG. 6, a refrigeration cycle in which the four-way valve 2 is not provided and a cooling operation and a dehumidification operation in the cooling cycle is possible, that is, the indoor heat exchanger 6 b and the accumulator 8 Even when the crusher 1 and the outdoor heat exchanger 3 are connected in series (not shown), the dehumidifying operation can be performed by applying the embodiment shown in any of FIGS. 2 to 5. In the same manner, the refrigerant flow noise generated in the dehumidifying expansion device can be similarly reduced.

 Also, in the refrigeration cycle shown in FIG. 1 or FIG. 6, the refrigeration cycle without the four-way valve 2 and the dehumidification operation in the heating cycle can be performed, that is, the outdoor heat exchanger 3, the accumulator 8, When the box box 1 and the indoor heat exchanger 6b are connected so as to be in series (not shown), one of the embodiments shown in FIGS. Refrigerant flow noise generated in the device can be reduced.

 In the configuration of the refrigeration cycle shown in FIG. 1 or FIG. 6, an accumulator is not necessarily required, and an accumulator without an accumulator may be used depending on the type of press used, the type of main squeezing device, and the control method. It can be configured as a frozen cycle.

The types of refrigerant flowing in the refrigeration cycle include single refrigerant such as HCFC22 currently used in air conditioners, ozone layer destruction, and the like. From the viewpoint of global warming, a mixed refrigerant, which is an alternative to HCFC22, can be used. In particular, when a mixed refrigerant is used, intermittent or continuous refrigerant flow noise is considered to be significant when the gas-liquid two-phase refrigerant flow flows into the throttle, but as described above, Applying the embodiment has the effect of reducing the flow noise of the refrigerant.

 Further, in each of the above embodiments, the description has been made on the assumption that the air conditioner is a astronaut. However, the present invention is not limited to this, and the present invention can be applied to a device for other uses requiring a dehumidifying operation. In such a case, the heat exchanger is generally not necessarily used indoors or outdoors.In this case, the indoor heat exchanger is the use side heat exchanger, the outdoor heat exchanger is the heat source side heat exchanger, and the indoor The fan is called the use side fan, and the outdoor fan is called the heat source side fan.

 As described above in detail, according to the air conditioner of the present invention, the indoor heat exchanger (use-side heat exchanger) is divided into two parts, and the dehumidifying throttle device used during the dehumidifying operation is provided between the two parts. During operation, one of the user-side heat exchangers is used as an evaporator and the other is used as a refrigerating box, and air is cooled, dehumidified and heated by a refrigeration cycle. By forming two passages, a sub-refrigerant passage that penetrates the main refrigerant passage connecting the valve port and the open port, the valve rod, and the valve body, and circulates the high-pressure refrigerant passage and the low-pressure refrigerant passage, The refrigerant flow is divided into two, and the kinetic energy and momentum of each flow can be dispersed. Further, by providing the inlet hole of the high-pressure remote refrigerant flow passage in the sub-refrigerant passage at the upper end of the flow passage, it is possible to have a gas-liquid separation function, and when the refrigerant flow is a single-phase flow, Therefore, even in the case of the gas-liquid two-phase flow, the generation of the refrigerant flow noise due to the refrigerant flow passing through the dehumidification control valve can be reduced. Further, since the heating capacity by the refrigerating cycle is relatively large, it is possible to perform a quiet and comfortable dehumidifying operation for lowering the humidity without lowering the room temperature.

Claims

The scope of the claims  1. A pressure box machine, a heat source side heat exchanger, and a use side heat exchanger, wherein the use side heat exchanger is thermally divided into two parts. In the meantime, a dehumidifying expansion device used during dehumidification operation is provided, and during dehumidification operation, freezing is performed so that the upstream side of the above-mentioned use side heat exchanger is a coagulator and the downstream side is an evaporator to perform dehumidification. In the air conditioner constituting a cycle, the dehumidifying throttle device S is provided in a high-pressure side refrigerant channel and a low-pressure side refrigerant channel, and a high-pressure side refrigerant channel, through which a refrigerant is caught in the valve body. It has a valve port through which the air flows through, and an open port through which the low-pressure side refrigerant flow path communicates, and forms a main refrigerant passage connecting the valve port and the open port. The opening area of the refrigerant passage was changed to stagger the flow rate of the refrigerant passing through the main refrigerant passage connecting the port and. A valve rod that can reciprocate within the main refrigerant passage, and has a sub-refrigerant passage that penetrates the high-pressure side refrigerant flow path and the low-pressure side refrigerant flow path separately from the main refrigerant path. An air conditioner comprising a dehumidification control valve. 2. A pressure box machine, a heat source side heat exchanger, and a use side heat exchanger, wherein the use side heat exchanger is thermally divided into two parts. A dehumidification expansion device used during the dehumidification operation is provided between the refrigeration system and the dehumidification operation so that the upstream side of the use-side heat exchanger is a coagulator and the downstream side is an evaporator during the dehumidification operation. In the air conditioner, the dehumidifying expansion device is provided in the valve body and passes through the high-pressure side refrigerant flow path, the low-pressure side refrigerant flow path, and the high-pressure side refrigerant flow path. And a main refrigerant passage connecting the valve port and the open port is formed, and the valve port and the open port are connected to each other. The opening area of the refrigerant passage is changed to adjust the flow rate of the refrigerant passing through the main refrigerant passage to be connected. A valve stem capable of reciprocating in the main refrigerant passage for causing And a dehumidification control valve having an auxiliary refrigerant passage for allowing refrigerant to flow from the high pressure side refrigerant flow path to the low pressure side refrigerant flow path through the valve stem and the valve body. An air conditioner characterized by:  3. A compressor, a heat source side heat exchanger, and a use side heat exchanger, wherein the use side heat exchanger is thermally divided into two parts, and between the two divided heat exchangers. A dehumidifying expansion device used during the dehumidifying operation is provided, and during the dehumidifying operation, the refrigeration cycle is performed so that the upstream side of the use-side heat exchanger is a coagulator and the downstream side is an evaporator to perform dehumidification. In the configured air conditioner, the dehumidifying expansion device is provided in the valve body 內, and a high-pressure side refrigerant flow path and a low pressure side refrigerant flow path through which the refrigerant flows, and a valve penetrating the high pressure side refrigerant flow path. A main refrigerant passage connecting the valve port to the open port, the main refrigerant path connecting the valve port to the open port, and a main refrigerant connecting the valve port to the open port. Changing the opening area of the refrigerant passage to adjust the flow rate of the refrigerant passing through the passage A valve rod capable of reciprocating in the main refrigerant passage, and a sub-refrigerant passage for allowing the refrigerant to flow from the high-pressure refrigerant passage to the low-pressure refrigerant passage in the valve stem. An air conditioner with a special dehumidification control valve.  4. The air conditioner according to claim 2, wherein the sub-refrigerant passage of the dehumidification control valve is configured such that an inlet hole on the high-pressure side refrigerant flow path side is provided at an upper end of the high-pressure side refrigerant flow path. Machine.  5. Air with an air compressor, an outdoor heat exchanger, an indoor heat exchanger divided into two, and a throttle device provided between these two indoor heat exchangers and throttled during dehumidification operation In the air conditioner, the expansion device has a gas-liquid separation means inside.