JPS62119340A - Ventilating fan of air conditioner - Google Patents

Abstract

PURPOSE:To be able to keep the temp. at the drain part in such temp. as dew condensed drain water is not frozen by forming an exhaust path that is placed at the lower part of a heat exchanger exchanging heat between exhaust and suction air and passes through the drain hole part to let flow a part of exhaust air discharged by an exhaust fan without exchanging heat with suction air. CONSTITUTION:Room air flows in the paths 28a of a heat exchanger 10 from a suction hole 8 to exchange heat with outdoor air and then is discharged from an exhaust hole 12. When humidity in room air is condensed to become dew-consensed water and the water drops in the bottom wall part of an outer case 1, the water is drained out from a drain hole 13 into the outdoor. A part of room air passes above the hole 13 and an insulating element 29 is placed between the bottom plate 19 forming an upper part of an exhaust path 30 and a heat-exchanging element 2, and therefore room air passing through the path 30 is not reduced in temp. to prevent dew condensed water from freezing.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention includes an exhaust fan, an intake fan, and a heat exchanger for exchanging heat between exhaust and intake air, and drains condensed water generated from the heat exchanger from a drain port. Concerning an empty ventilation fan that discharges air to the outside of the aircraft.

[Technical Background of the Invention] Conventionally, this type of air conditioning ventilation fan has been equipped with an exhaust fan to exhaust indoor air to the outside, an intake fan to draw outdoor air into the room, and a heat exchanger. It is designed to exchange heat between the indoor air and outdoor air.
In addition, a drain port is formed in the bottom wall of the outer casing, located on the side of the heat exchanger and on the outside of the room. With such a configuration, during cold weather such as winter, the condensation water that is generated when the hot and humid indoor air discharged by the exhaust fan exchanges heat with the low temperature outdoor air taken in by the intake fan can be reduced. 1- The water is discharged from the drain hole outside the machine.

[Problems in the Background Art] However, in the configuration described in item 1, the drain opening becomes low in lH during cold weather such as winter, so condensation water may freeze at the drain opening and block the drain opening. There was a problem with this.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and therefore, its object is to provide an air vent 1'J♂j that can prevent condensed water generated from a heat exchanger from freezing at the drain port. Provide ventilation fans.

[Summary of the Invention] The present invention forms an exhaust passage that passes through a drain port below a heat exchanger, thereby discharging a portion of the exhaust air from an exhaust fan without exchanging heat with intake air. The feature is that the temperature of the part can be maintained at a temperature at which the condensed water does not freeze.

[Embodiments of the invention] An embodiment of the invention will now be described with reference to the drawings.

First of all, in Fig. 1, 1 is an outer casing, and inside this, on the left side in the figure, 11 cutouts 2 are attached to divide this into front and back parts.
The partition plate 2 is equipped with one double-shaft motor 3. 4 is an exhaust fan attached to the -Jj end of the rotating shaft of the motor 3 and disposed at the front of the left side of the outer casing 1 in the figure; 5 is the end of the rotating shaft of the motor 3; The intake fan is installed at the rear of the left side of the outer casing 1, and the casing 6.7
On the left side of the front surface of the outer casing 1 in the figure, there is an indoor air intake port 8 facing the exhaust fan 4, and on the rear side of the outer casing 1 on the left side in the figure, there is an air intake port 8 facing the exhaust fan 4. Outdoor air suction ports 9 facing the fan 5 are respectively formed.

10 is a heat exchanger with a small gap (J) disposed on the right side of the inside of the outer casing 1 in the figure, and a gap between it and the rear part (see J). An electric air outlet 11 is formed in the middle right side, and an indoor air outlet 12 is formed in the right side of the rear face in the figure.13 is located on the outdoor side of the bottom wall 1a of the outer casing 1. This is a drain port formed near the indoor air outlet 12. Reference numeral 14 denotes a decorative cover that is reliably fitted over the entire front surface of the outer casing 1. An inlet 15 is formed to communicate with the outdoor air outlet 11 of the outer casing 1, and an indoor air outlet 16 is formed in the remaining part of the front surface to communicate with the indoor air inlet 8 of the outer casing 1. Here, the heat exchanger 10 is, in detail, a bottom plate placed on the bottom wall 1a of the outer casing 1 and bent downward at the periphery, as shown in FIGS. 2 and 3. First, the heat exchange element 22 having the protruding stripes 20.21 is housed in a support frame 19 formed by supporting pieces 18 erected at the four corners and one side of the protruding stripes 23. A large number of heat exchangers r25 including heat exchangers 24 and 24 are housed, and a large number of heat exchangers r25 are stacked alternately, and a lid 26 is placed on the heat exchanger r25.

Furthermore, with the above-described configuration, this heat exchanger 10 alternately forms outdoor air passages 27 shown by solid lines in FIG. 3 and indoor air passages 28 shown by broken lines between each heat exchange element 22, 25 and the lid 26. It forms a so-called counterflow type, with the artificial part 27a of the outdoor air passage 27 connected to the intake fan 5, and the outlet part 2 connected to the intake fan 5.
7b respectively facing the outdoor air outlet 11 of the outer casing 1,
On the other hand, the artificial part 28a of the indoor air passage 28 faces the exhaust fan 4, and the outlet part 28b faces the indoor air discharge port 12 of the outer casing 1, respectively. 29 is a heat insulating member interposed between the bottom plate 171 and the lower surface of the heat exchange element 22. 30
is an exhaust path that is formed between the lower surface of the bottom plate 17 and the bottom wall 1a of the outer f'21 (i.e., below the heat exchanger 10) and leads to the drain port 13; The artificial part 30a is formed by cutting out the side part of the bottom plate 17, and the outlet part 30b is formed by cutting the rear part of the bottom plate 17 facing the indoor air outlet 12, which is the same as the indoor air passage 28. It forms an exhaust route for indoor air.

Now, in the case of a dual fan configuration, when the motor 3 is energized and started, the exhaust fan 4 and the intake fan 5 are rotated. As a result, indoor air is drawn into the casing 6 from the indoor air outlet 16 of the decorative cover 14 through the indoor air suction port 8 of the outer casing 1, and most of it is heated as shown by arrow A in FIG. The indoor air passage 28 of the exchanger 10 is discharged from the artificial part 28a through the indoor air passage 28, through the outlet part 28b, and from the indoor air outlet 12 of the outer casing 1 to the outside, and the remaining part is discharged from the exhaust passage 30. entrance part 3
From 0a, the air passes through the exhaust passage 30, passes through the outlet portion 30b, and is discharged to the outside from the indoor air discharge port 12. On the other hand, outdoor air is sucked into the casing 7 from the outdoor air suction port 9 of the outside i3l, and then passes through the heat exchanger 1 as shown by arrow B in FIG.
Air flows into the room from the outdoor air inlet 15 of the decorative cover 14 through the outdoor air channel 27 from the artificial part 27a of the outdoor air passage 27 of 0, through the outlet 27b and the outdoor air outlet 11 of the outside i'21. . The indoor air and outdoor air exchange heat while passing through the heat exchanger 10, so that the outdoor air is warmed and the indoor air is cooled. At this time, for example, if the heat exchanger 10 has a heat exchange efficiency of 7096, and the indoor temperature is 20°C and the outdoor temperature is -5°C, the discharge temperature to the outside will be 2.5°C, and the moisture contained inside the indoor air will be The condensed water becomes dew water, which drips onto the bottom wall of the outer casing 1 from the outlet portion 27b and is discharged from the drain port 13 to the outside. on the other hand,
A part of the indoor air discharged outside through the above-mentioned exhaust passage 30 passes through the drain opening 13. In this case, the bottom plate 1 which is the upper part of the exhaust passage 30 passes through the drain opening 13.
Since a heat insulating member 29 is provided between the heat exchange element 22 and the heat exchange element 22, the internal air passing through the exhaust passage 30 is transferred to the heat exchanger 10.
There is no heat exchange with the outdoor air passing through the exhaust passage 30, so the indoor air passing through the exhaust passage 30 passes above the drain hole 13 while remaining warm without lowering its temperature. In this way, the drain port 13 can be kept warm and kept at a temperature at which the condensed water does not freeze, thereby preventing the drain port 13 from being blocked by freezing.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings. By arranging the heat exchanger 10, the heat insulating part shrine 29 is not necessary, and the exhaust passage 30 is not formed by the bottom plate 17 of the heat exchanger 10, but is formed by the outer casing 1 instead. Various modifications may be made without departing from the scope of the invention.

[Effects of the Invention] As is clear from the description in 1- below, according to the present invention, a part of the indoor air can be passed through the drain port without exchanging heat with outdoor air, thereby warming the drain port. This prevents the condensed water generated from the heat exchanger from freezing at the drain port, preventing the drain port from clogging, and does not require a heater or the like. It has excellent effects such as being economical.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a cross-sectional view of the whole, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a cross-sectional view of the heat exchanger. It is an exploded perspective view. In the figure, 1 is the outer L8.4 is the exhaust fan, 5 is the intake fan,
10 is a heat exchanger, 13 is a drain port, and 30 is an I non-air path. Applicant Toshiba Tor Co., Ltd. 1 Figure 2

Claims (1)

[Claims] 1. An exhaust fan, an intake fan, and a heat exchanger that exchanges heat between the exhaust and intake air from both fans are installed in the outer casing,
In addition, a drain port for discharging condensed water generated from the heat exchanger to the outside of the machine is formed on the outside of the machine, and an exhaust path is formed below the heat exchanger through the drain port portion. An air conditioning ventilation fan characterized by: