WO2018121374A1

WO2018121374A1 - Liquid-state refrigerant replenishing apparatus

Info

Publication number: WO2018121374A1
Application number: PCT/CN2017/117426
Authority: WO
Inventors: 于海军; 李玉兰; 常建平; 李秀霞; 位红燕
Original assignee: 同方威视技术股份有限公司
Priority date: 2016-12-27
Filing date: 2017-12-20
Publication date: 2018-07-05
Also published as: CN106766434A

Abstract

A liquid-state refrigerant replenishing apparatus (100) used for replenishing a liquid-state refrigerant in a storage tank (300) into a refrigeration apparatus (200), comprising: a pressure boosting apparatus (2) used for delivering a gas to the interior of the storage tank (300) so as to discharge the refrigerant in the storage tank (300) from the storage tank (300), a sealing component (4) hermetically connected to an opening of the storage tank (300), an air intake pipe connecting the pressure boosting apparatus (2) to the storage tank (300) via the sealing component (4) so as to transfer the gas in the pressure boosting apparatus (2) into the storage tank (300), and a liquid transfer pipe connecting the storage tank (300) to the refrigeration apparatus (200) via the sealing component (4) so as to transfer the refrigerant in the storage tank (300) into the refrigeration apparatus (200).

Description

Liquid refrigerant replenishing device

Cross-reference to related applications

The present application claims the benefit of the Chinese Patent Application No. 201611234916.9, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present disclosure relates to a liquid refrigerant replenishing device, and in particular to a liquid nitrogen replenishing device.

Background technique

In the prior art, a refrigerating device is additionally replenished with a refrigerant using a storage tank storing a liquid refrigerant such as liquid nitrogen. In the process of replenishment, as the liquid nitrogen in the tank is gradually reduced, there is not enough pressure in the tank, and the replenishment of liquid nitrogen may be interrupted, so that it is impossible to continuously, efficiently and sufficiently supply the refrigeration equipment. Liquid nitrogen. In addition, when the replenishment is interrupted, there is a possibility that the pressure inside the storage tank is insufficient but residual nitrogen cannot be utilized, resulting in waste. In addition, when the replenishment is interrupted, the operator cannot know the state of the nitrogen in the tank, and safety problems are likely to occur during the replacement of the tank.

Summary of the invention

It is an object of the present disclosure to provide a liquid refrigerant replenishing device to solve the above technical problems.

One aspect of the present disclosure relates to a liquid refrigerant replenishing device for replenishing a liquid refrigerant in a storage tank to a refrigerating device, the liquid refrigerant replenishing device comprising: a supercharging device The pressurizing device is configured to deliver a gas to the interior of the storage tank to discharge the refrigerant in the storage tank to the storage tank; a closing assembly, the sealing assembly is sealingly connected with the opening of the storage tank; the intake pipe and the infusion liquid a tube passing through the closure assembly to communicate the pressurization device with the storage tank to transfer the gas of the pressurization device to the storage tank, the infusion tube passing through the closure assembly to communicate the storage tank with the refrigeration device, In order to deliver the refrigerant in the tank to the refrigeration unit.

According to an embodiment, the closure assembly comprises a closure cap, a connecting flange, a sealing ring, the connecting flange is sleeved on the opening of the storage tank, and the closing cover is stacked above the connecting flange, The sealing ring is disposed between the closing cover and the connecting flange, wherein two passages are provided inside the closing cover so that the intake pipe and the infusion pipe respectively pass through to extend into the storage tank.

According to an embodiment, the closure assembly comprises a closure cap, a connecting flange, a sealing ring, the connecting flange is sleeved on the opening of the storage tank, and the closing cover is stacked above the connecting flange, The sealing ring is disposed between the closing cover and the connecting flange, wherein two channels are disposed in a portion of the closing cover adjacent to the sealing ring so that the intake pipe and the infusion pipe respectively pass through to the storage tank in.

According to an embodiment, a controller is further included, the controller being electrically connected to the boosting device and the refrigeration device, respectively, to control a gas supply of the boosting device according to a feedback signal in the refrigeration device.

According to an embodiment, the top of the top of the closure cap is further provided with a through hole for installing a deflation valve and/or a safety valve for releasing the gas in the storage tank at the end of the refrigerant delivery The safety valve is used to prevent the pressure in the tank from exceeding the allowable pressure during the conveying process.

According to an embodiment, the connecting flange is fixed to the opening of the storage tank by screws, and the closing cover and the connecting flange are also fixed by screws, so that the closing cover of the closing assembly and the connecting flange are closed and closed A gas-tight connection between the component and the tank.

According to an embodiment, the boosting device is an air pump.

According to an embodiment, the refrigerant is liquid nitrogen.

According to an embodiment, the intake manifold includes an intake section extending from the closure assembly into the storage tank, the infusion tube including an infusion section extending from the closure assembly into the storage tank, the intake section The length is less than the length of the infusion section, the end of the inlet section extending into the tank is adjacent to the opening of the tank, and the end of the infusion section extending into the tank is near the bottom of the tank .

According to an embodiment, the end of the infusion tube extending into the storage tank is near the bottom of the storage tank, and the liquid refrigerant replenishing device further comprises a temperature sensor, the temperature sensor being disposed in the infusion tube Close to the end of the bottom of the tank and electrically connected to a controller external to the tank, the temperature sensor senses the temperature difference caused by the liquid level drop, and sends the temperature difference information to the controller, and the controller responds to the temperature difference The information is controlled to control the boosting device to interrupt the delivery of refrigerant to the refrigeration device.

According to an embodiment, the temperature sensor is arranged at a distance above the end of the infusion tube near the bottom of the tank.

The liquid refrigerant replenishing device according to the present disclosure enables continuous and accurate replenishment of the liquid refrigerant, increases safety, and is easy to operate.

DRAWINGS

Figure 1 shows a schematic view of a liquid refrigerant replenishing device in accordance with the present disclosure;

2 shows a schematic view of the installation of a liquid refrigerant replenishing device according to the present disclosure;

3 shows a schematic view of a closure assembly of a liquid refrigerant replenishing device in accordance with the present disclosure;

4 shows a schematic cross-sectional view of a liquid refrigerant replenishing device mounted to a storage tank in accordance with the present disclosure.

detailed description

The technical solutions of the present disclosure will be further specifically described below by way of embodiments and with reference to the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar parts. The description of the embodiments of the present disclosure is intended to be illustrative of the present invention, and is not to be construed as limiting

According to a general idea of the present disclosure, a liquid refrigerant replenishing device for replenishing a liquid refrigerant in a storage tank to a refrigerating device includes: a supercharging device, the supercharging device Means for delivering gas to the interior of the storage tank to discharge the refrigerant in the storage tank to the storage tank; a closure assembly, the closure assembly being sealingly connected to the opening of the storage tank; an intake pipe and an infusion pipe, the intake pipe Passing a boosting device with the storage tank through the closure assembly to transfer the gas of the pressurized device to the storage tank, the infusion tube communicating the storage tank with the refrigeration device through the closure assembly to draw the refrigerant in the storage tank Transfer to the refrigeration unit.

In the following detailed description, numerous specific details are set forth Obviously, however, one or more embodiments may be practiced without these specific details.

1 and 2 show schematic and installation schematics of a liquid refrigerant replenishing device in accordance with the present disclosure.

The liquid refrigerant replenishing device 100 according to the present disclosure is for replenishing the liquid refrigerant in the accumulator 300 into the refrigerating apparatus 200, which in the present embodiment is liquid nitrogen. As shown, the liquid refrigerant replenishing device 100 includes a pressurizing device 2 for delivering a gas to the interior of the accumulator 300 to discharge the refrigerant in the accumulator 300. a storage tank 300; a closure assembly 4, the closure assembly 4 being sealingly connected to the opening of the storage tank 300; an intake pipe 3 and an infusion pipe 8, the intake pipe 3 passing through the closure assembly to connect the pressurizing device 2 with the storage tank 300, In order to transfer the gas of the supercharging device 2 into the storage tank 300, the infusion tube 8 communicates with the refrigeration device 200 through the closure assembly 4 to deliver the refrigerant in the storage tank 300 to the refrigeration device 200. .

The closing assembly 4 includes a closing cover 41, a connecting flange 42, and a sealing ring 43. The connecting flange 42 is sleeved in the opening of the storage tank 300, and the closing cover 41 is stacked on the connecting flange 42. Above, the sealing ring 43 is disposed between the closing cover 41 and the connecting flange 42, wherein two passages are provided inside the closing cover 41 so that the intake pipe 3 and the infusion pipe 8 respectively extend through To the tank 300.

Alternatively, two channels are provided in a portion of the closure cap 41 adjacent to the seal ring 43 so that the intake pipe 3 and the infusion tube 8 respectively pass through to the storage tank 300.

Wherein, the liquid refrigerant replenishing device 100 according to the present disclosure further includes a controller 1 that is electrically connected to the supercharging device 2 and the refrigerating device 200, respectively, to be controlled according to a feedback signal in the refrigerating device 200 Gas supply to the supercharging device 2. In the present embodiment, the supercharging device 2 is an air pump.

Wherein, the center of the top of the closing cover 41 is further provided with a through hole for installing the venting valve 5 and/or the safety valve 7, and the venting valve 5 is for releasing the inside of the storage tank 300 at the end of the refrigerant delivery. The gas, the safety valve 7 is used to prevent the pressure in the tank 300 from exceeding the allowable pressure during the conveying process. Set put The gas valve 5 and/or the safety valve 7 ensure safety during the delivery of the refrigerant as well as at the end of the delivery.

Wherein, the connecting flange 42 is fixed to the opening of the storage tank 300 by screws 46, and the closing cover 41 and the connecting flange 42 are also fixed by screws 46, so that the closing cover 41 and the connecting flange of the closing assembly 4 A gas-tight connection between 42 and between the closure assembly 4 and the storage tank 300.

Wherein, the liquid level gauge 6 is further disposed on the sealing assembly 4 to display the storage amount of the refrigerant in the storage tank 300 to the operator. Wherein the intake manifold 3 includes an intake section 31 extending from the closure assembly 4 into the tank 300, the infusion tube 8 including an infusion section 81 extending from the closure assembly 4 into the reservoir 300, the inlet The length of the gas section 31 is smaller than the length of the infusion section 81, the end of the inlet section 31 extending into the tank 300 is close to the opening of the storage tank 300, and the infusion section 81 extends to the reservoir The end within the can 300 is near the bottom of the canister 300.

Wherein, the liquid refrigerant replenishing device further includes a temperature sensor 48 disposed at an end of the infusion section 81 near the bottom of the tank 300 and electrically connected to the controller 1 outside the tank 300, The warning information is provided to the controller 1 when the level of the liquid refrigerant in the reservoir 300 drops below the end of the infusion section 81.

Wherein, the temperature sensor 48 is disposed at a distance above the end of the infusion section 81 near the bottom of the tank 300.

Specifically, as shown in FIG. 4, the temperature sensor 48 at the end of the infusion section 81 near the bottom of the tank 300 is connected to the adapter connector 44 via a signal line 47, and the adapter connector 44 is hermetically embedded. In an additional passage of the closure cover 41 of the closure assembly, one end of the signal line 47 is connected to the temperature sensor 48, the other end is connected to the adapter connector 46 via a passage, and the adapter connector 44 is passed through the wire 45 to the exterior of the tank 300. The controller 1 is electrically connected. There is a difference in temperature above and below the gas-liquid interface. In the process of supplying the liquid refrigerant to the refrigerating apparatus, when the liquid level of the liquid refrigerant in the accumulator 300 falls below the temperature sensor 48, the temperature sensor 48 can detect the temperature difference and transmit the temperature difference information. To the controller 1, the controller 1 can control the supercharging device 2 in response to this information to interrupt the refrigerant delivery to the refrigerating device, preventing the liquid level of the liquid refrigerant from falling below and separating from the infusion section 81.

Wherein, the outside of the infusion tube 8 is also provided with a heat insulating tube 9 so that the refrigerant is insulated from the outside during the conveying process. This prevents the risk of expansion or even explosion of the refrigerant when it is heated by the room temperature when it passes through the infusion tube 8.

The closure cap 41 and/or the connecting flange 42 are made of polytetrafluoroethylene. The seal ring 43 is made of nitrile rubber. These materials are all materials that are good for sealing. It is contemplated by those skilled in the art that the materials of the components of the closure assembly are not limited thereto, but may be any other material capable of achieving a seal.

Wherein the closure assembly has a diameter of 50 mm or 80 mm. These two sizes correspond to the general opening size of the canister 300 in the art, and thus the refrigerant replenishing device 100 according to the present disclosure can be applied to all types of storage tanks in the art. Of course, the diameter of the closure assembly is not limited thereto, and may be any size as needed.

The present disclosure has been described with reference to the accompanying drawings, which are intended to be illustrative of the preferred embodiments of the present invention and are not to be construed as limiting.

While some embodiments of the present general inventive concept have been shown and described, it will be understood by those skilled in the art The scope is defined by the claims and their equivalents.

Claims

A liquid refrigerant replenishing device for replenishing a liquid refrigerant in a storage tank to a refrigerating device, the liquid refrigerating device comprising:

a supercharging device for delivering a gas to the interior of the storage tank to discharge the refrigerant in the storage tank to the storage tank;

a closure assembly, the closure assembly being sealingly coupled to the opening of the storage tank;

An intake pipe and an infusion pipe, the intake pipe passing through the closing assembly to communicate the charging device with the storage tank to transfer the gas of the charging device to the storage tank, the infusion pipe passing through the closing assembly to the storage tank and the refrigeration device Connected to deliver refrigerant from the tank to the refrigeration unit.
The liquid refrigerant replenishing device according to claim 1, wherein the closing assembly comprises a closing cover, a connecting flange, a sealing ring, and the connecting flange is sleeved to the opening of the storage tank, the closing The cover is placed above the connecting flange, and the sealing ring is disposed between the closing cover and the connecting flange, wherein two passages are arranged inside the closing cover so that the intake pipe and the infusion pipe respectively pass through Extend to the tank.
The liquid refrigerant replenishing device according to claim 1, wherein the closing assembly comprises a closing cover, a connecting flange, a sealing ring, and the connecting flange is sleeved to the opening of the storage tank, the closing a cover stack is disposed above the connecting flange, the sealing ring being disposed between the closing cover and the connecting flange, wherein two channels are provided at a portion of the closing cover adjacent to the sealing ring for the intake pipe And the infusion tube passes through and extends into the storage tank.
The liquid refrigerant replenishing device according to any one of claims 1 to 3, further comprising a controller electrically connected to the supercharging device and the refrigerating device, respectively, according to the refrigerating device The feedback signal in the control controls the gas supply of the boosting device.
The liquid refrigerant replenishing device according to claim 2 or 3, wherein a center of the top of the closing cover is further provided with a through hole for mounting a bleed valve and/or a safety valve, and the vent valve is used for The gas in the storage tank is released at the end of the refrigerant delivery, and the safety valve is used to prevent the pressure in the storage tank from exceeding the allowable pressure during transportation.
The liquid refrigerant replenishing device according to claim 2 or 3, wherein the connecting flange is fixed to the opening of the storage tank by screws, and the closing cover and the connecting flange are also fixed by screws, so that A gas-tight connection between the closure cap of the closure assembly and the connecting flange and between the closure assembly and the storage tank.
The liquid refrigerant replenishing device according to any one of claims 1 to 3, wherein the supercharging device is an air pump.
The liquid refrigerant replenishing device according to any one of claims 1 to 3, wherein the refrigerant is liquid nitrogen.
A liquid refrigerant replenishing device according to any one of claims 1 to 3, wherein the intake pipe includes an intake section extending from the closure assembly into the storage tank, the infusion tube including the closure assembly Extending into an infusion section within the storage tank, the length of the inlet section being less than the length of the infusion section, the end of the inlet section extending into the tank being adjacent the opening of the tank, The end of the infusion section that extends into the tank is near the bottom of the tank.
The liquid refrigerant replenishing device according to any one of claims 1 to 3, wherein the end of the infusion tube extending into the storage tank is near the bottom of the storage tank, and the liquid refrigerant replenishing device is further A temperature sensor is disposed at an end of the infusion tube near the bottom of the tank and electrically connected to a controller external to the tank, the temperature sensor sensing a temperature difference caused by a drop in the liquid level, and the temperature The difference information is sent to the controller, and the controller controls the boosting device in response to the temperature difference information Thereby the refrigerant delivery to the refrigeration unit is interrupted.
The liquid refrigerant replenishing device according to claim 10, wherein the temperature sensor is disposed at a distance above an end of the infusion tube near the bottom of the tank.