CN212777838U

CN212777838U - Liquid cooling system of air conditioner electric control board

Info

Publication number: CN212777838U
Application number: CN202021731338.1U
Authority: CN
Inventors: 华麟; 陈仔旺; 廖宜利; 谢文科
Original assignee: Guangdong Haiwu Technology Co Ltd
Current assignee: Guangdong Haiwu Technology Co Ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-03-23
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a liquid cooling system of an air conditioner electric control board, which comprises an evaporator, a condenser and an electric control board, wherein a compressor is communicated with the evaporator and the condenser through pipelines to form a loop, the compressor is electrically connected with the electric control board, and a condensation flow path for circulating a refrigerant is arranged in the condenser; the cooling system further comprises a liquid cooling assembly, the liquid cooling assembly comprises a heat conducting plate, a supercooling flow path, a liquid inlet pipe and a liquid outlet pipe, the heat conducting plate and the electric control plate are arranged in a heat conducting mode, a cooling channel is formed in the heat conducting plate, two ports of the cooling channel are connected in series with the condensation flow path through the liquid inlet pipe and the liquid outlet pipe respectively, and the liquid outlet pipe is communicated with the condensation flow path through the supercooling flow path. When the heat-dissipating device is used, a refrigerant enters a condensation flow path of the condenser through the compressor, the refrigerant enters a cooling channel of the heat-conducting plate through the liquid inlet pipe after being cooled to carry out heat transfer with the electric control plate, the refrigerant after absorbing heat flows through the supercooling flow path from the liquid outlet pipe, and the refrigerant returns to a refrigerant system circulation flow path after being cooled in the supercooling flow path, so that the heat dissipation is stable and good in effect.

Description

Liquid cooling system of air conditioner electric control board

Technical Field

The utility model relates to an air conditioner technical field, concretely relates to liquid cooling system of automatically controlled board of air conditioner.

Background

When the variable frequency air conditioner runs for a long time, the electric control board can generate a large amount of heat in work, so that the electronic elements can keep high temperature for a long time. If the processing is not timely carried out, the working performance of the electric control board is affected. Therefore, a reasonable heat dissipation mode needs to be selected, so that the working temperature of the electric control board of the variable frequency air conditioner can be controlled.

At present, the heat dissipation mode to the automatically controlled board among the inverter air conditioner does: an aluminum substrate with fins is attached to the back of the electric control board, and air is blown to the aluminum substrate through air circulation air in the machine to dissipate heat of the electric control board. The structure and principle of the heat dissipation mode are simple, but because the environment temperature of the electric control board is high, the wind speed can be reduced along with the environment change, when the wind speed is too low, the wind cooling effect is poor, the heat dissipation effect of the electric control board can be greatly reduced, the machine performance is affected by the too high temperature of the electric control board, and even potential safety hazards exist. Moreover, the air cooling mode is greatly influenced by external environment and the like, the cooling effect is unstable, and the heat dissipation efficiency is difficult to reach the standard.

Disclosure of Invention

There is above-mentioned technical problem to prior art, the utility model provides a liquid cooling system of automatically controlled board of air conditioner, it is stable to the cooling effect of automatically controlled board, and the cooling is effectual.

In order to achieve the above object, the utility model provides a following technical scheme:

the liquid cooling system of the air conditioner electric control board comprises an evaporator, a condenser and an electric control board, wherein the evaporator and the condenser are communicated with a compressor through a pipeline to form a loop, the compressor is electrically connected with the electric control board, a condensation flow path for circulating a refrigerant is arranged in the condenser, one end of the condensation flow path is connected with the compressor after collecting current, and the other end of the condensation flow path is connected with the evaporator after collecting current; the method is characterized in that: the cooling system further comprises a liquid cooling assembly, the liquid cooling assembly comprises a heat conducting plate, a supercooling flow path, a liquid inlet pipe and a liquid outlet pipe, the heat conducting plate and the electric control plate are arranged in a heat conducting mode, a cooling channel is formed in the heat conducting plate, the cooling channel is communicated with the condensation flow path through the liquid inlet pipe and is communicated with the supercooling flow path through the liquid outlet pipe, and the supercooling flow path is communicated with the evaporator.

Preferably, the liquid cooling subassembly still includes the keysets, and laminating each other is fixed and heat conduction between keysets and the automatically controlled board, and laminating each other is fixed and heat conduction between heat-conducting plate and the keysets.

Preferably, a heat-conducting silicone grease layer is coated between the adapter plate and the electric control plate

Preferably, a heat-conducting silicone grease layer is coated between the adapter plate and the heat-conducting plate.

Preferably, a preset creepage distance is reserved locally between the adapter plate and the electric control plate.

Preferably, an insulating sheet is arranged at a part between the adapter plate and the electric control plate.

Preferably, the heat conducting plate and the adapter plate are metal plates.

Preferably, the inner wall of the cooling channel is provided with a plurality of concave channel-shaped corrugations.

Preferably, the subcooling flow path is a tube located within the condenser, or the subcooling flow path is a separate heat exchanger.

The utility model has the advantages that:

the utility model discloses a liquid cooling system of automatically controlled board of air conditioner, the refrigerant passes through the condensation flow path that the compressor got into the condenser during use, get into the cooling channel of heat-conducting plate through the feed liquor pipe after the refrigerant cooling, the refrigerant in the cooling channel carries out the heat transfer through the lateral wall of heat-conducting plate and automatically controlled board, the refrigerant after the heat absorption flows through the supercooling flow path from the drain pipe, the refrigerant gets back to in the refrigerant system circulation flow path after the supercooling flow path cooling, so realize utilizing the condenser to carry out the liquid cooling heat dissipation to automatically controlled board, the heat dissipation is stable and effectual.

Drawings

Fig. 1 is a partial structural schematic diagram of a liquid cooling system of an air conditioning electronic control board in an embodiment.

Fig. 2 is a schematic diagram illustrating a partial structure of a liquid cooling module in combination with an electric control board according to an embodiment.

Fig. 3 is a system schematic diagram of a liquid cooling system of an air conditioning electronic control board in an embodiment.

Fig. 4 is another system schematic diagram of a liquid cooling system of an air conditioning electronic control board in the embodiment.

Reference numerals:

the condenser 1, the electric control board 2 and the compressor 3;

the liquid cooling component 4, the heat conducting plate 41, the supercooling flow path 42, the liquid inlet pipe 43, the liquid outlet pipe 44 and the adapter plate 45;

an evaporator 5 and a throttling mechanism 6.

Detailed Description

The present invention will be described in detail with reference to the following embodiments and accompanying drawings.

The liquid cooling system of the air conditioner electric control board of the embodiment, as shown in fig. 1 to fig. 3, includes an evaporator 5, a condenser 1 and an electric control board 2, the evaporator 5 and the condenser 1 are communicated with a compressor 3 through a pipeline to form a circulation loop, and the compressor 3 is electrically connected with the electric control board 2. The condenser 1 is internally provided with a plurality of condensing flow paths for circulating a refrigerant, one ends of the plurality of condensing flow paths are connected with the compressor 3 after collecting flow, and the other ends of the plurality of condensing flow paths are connected with the evaporator through the throttling mechanism 6 after collecting flow. As an improvement, the cooling system further comprises a liquid cooling assembly 4, the liquid cooling assembly 4 comprises a heat conducting plate 41, a supercooling flow path 42, a liquid inlet pipe 43 and a liquid outlet pipe 44, the heat conducting plate 41 and the electric control plate 2 are arranged in a heat conducting manner, a cooling channel is formed inside the heat conducting plate 41, the cooling channel is communicated with the condensation flow path through the liquid inlet pipe 43 and is communicated with the supercooling flow path 42 through the liquid outlet pipe 44, and the supercooling flow path 42 is communicated with the evaporator. The heat conducting plate 41 of this embodiment has a small volume, and two back and forth U-shaped channels are formed inside the heat conducting plate, and in other embodiments, if the area of the heat conducting plate is large, S-shaped channels arranged in a serpentine shape are adopted.

When the heat dissipation device is used, a refrigerant enters a condensation flow path of the condenser 1 through the compressor 3, the refrigerant enters a cooling channel of the heat conduction plate 41 through the liquid inlet pipe 43 after being cooled, the refrigerant in the cooling channel is in heat transfer with the electric control plate 2 through the side wall of the heat conduction plate 41, the refrigerant after absorbing heat flows through the supercooling flow path 42 from the liquid outlet pipe 44, and the refrigerant returns to a refrigerant system circulation flow path after being cooled in the supercooling flow path 42, so that liquid cooling heat dissipation of the electric control plate 2 by using the condenser 1 is realized, and the heat dissipation is stable and good. In the present embodiment, the subcooling flow path 42 is provided in the end pipe of the condenser 1, which facilitates the integral processing.

In other embodiments, as shown in fig. 4, the subcooling flow path 42 is instead provided in a separate heat exchanger, for example, an existing economizer is adopted, two ends of one subcooling flow path 42 in the economizer are respectively connected to the liquid outlet pipe 44 and the throttling mechanism 6, two ends of the other flow path are respectively connected to the evaporator 5 and the compressor 3, the refrigerant in the subcooling flow path 42 is heated and liquefied in the economizer, and simultaneously, the refrigerant in the other flow path is favorable for absorbing heat and vaporizing, the fully vaporized refrigerant enters the compressor 3 to avoid the liquid impact risk of the compressor in the refrigeration system, and the subcooling flow path 42 is provided in the economizer, so that the refrigerant is favorable for sufficient subcooling before entering the throttling mechanism, the condensation problem of the heat conducting plate 41 is effectively solved, the overall heat exchange efficiency of the system is higher, the COP energy efficiency ratio of the system is improved, and the structural size of the condenser 1 can, the weight is reduced, and the installation and the transportation are facilitated.

In this embodiment, liquid cooling subassembly 4 still includes keysets 45, and it is fixed and heat conduction to laminate each other between keysets 45 and the automatically controlled board 2, and it is fixed and heat conduction to laminate each other between heat-conducting plate 41 and the keysets 45, and keysets 45's effect is that the automatically controlled board 2 of being convenient for dismantles when breaking down and maintains, changes.

In this embodiment, heat-conducting silicone grease layers are respectively coated between the adapter plate 45 and the electric control plate 2 and between the adapter plate 45 and the heat-conducting plate 41, which is beneficial to stable heat conduction and cooling.

In this embodiment, a preset creepage distance is left in a part between the adapter plate 45 and the electric control plate 2 where discharge is possible, or an insulating sheet, such as a ceramic sheet, is provided in a part between the adapter plate 45 and the electric control plate 2 where discharge is possible, so as to avoid potential safety hazards. In practice, the creepage distance and the position of the insulating sheet are arranged at the corresponding positions of the heat dissipation elements (IGBT, IPM, diode, rectifier bridge stack, etc.) of the electric control board.

In this embodiment, the heat conducting plate 41 and the adapter plate 45 are metal plates, which have good heat conducting effect, and the inner wall of the cooling channel is provided with a plurality of concave channel-shaped folds to increase the heat conducting area of the refrigerant in the cooling channel.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A liquid cooling system of an air conditioner electric control board comprises an evaporator, a condenser and an electric control board, wherein the evaporator and the condenser are communicated with a compressor through a pipeline to form a loop; the method is characterized in that: the cooling system further comprises a liquid cooling assembly, the liquid cooling assembly comprises a heat conducting plate, a supercooling flow path, a liquid inlet pipe and a liquid outlet pipe, the heat conducting plate and the electric control plate are arranged in a heat conducting mode, a cooling channel is formed in the heat conducting plate, the cooling channel is communicated with the condensation flow path through the liquid inlet pipe and is communicated with the supercooling flow path through the liquid outlet pipe, and the supercooling flow path is communicated with the evaporator.

2. The liquid cooling system of the electric control board of the air conditioner as claimed in claim 1, wherein: the liquid cooling assembly further comprises an adapter plate, the adapter plate and the electric control plate are mutually attached and fixed and conduct heat, and the heat conducting plate and the adapter plate are mutually attached and fixed and conduct heat.

3. The liquid cooling system of the electric control board of the air conditioner as claimed in claim 2, wherein: a heat-conducting silicone grease layer is coated between the adapter plate and the electric control plate.

4. The liquid cooling system of the electric control board of the air conditioner as claimed in claim 2, wherein: a heat-conducting silicone grease layer is coated between the adapter plate and the heat-conducting plate.

5. The liquid cooling system of the electric control board of the air conditioner as claimed in claim 2, wherein: and a preset creepage distance is reserved locally between the adapter plate and the electric control plate.

6. The liquid cooling system of the electric control board of the air conditioner as claimed in claim 2, wherein: an insulating sheet is arranged at the part between the adapter plate and the electric control plate.

7. The liquid cooling system of the electric control board of the air conditioner as claimed in claim 2, wherein: the heat conducting plate and the adapter plate are metal plates.

8. The liquid cooling system of the electric control board of the air conditioner as claimed in claim 1, wherein: the inner wall of the cooling channel is provided with a plurality of concave channel-shaped folds.

9. The liquid cooling system of the electric control board of the air conditioner as claimed in claim 1, wherein: the subcooling flow path is a tube located within the condenser or the subcooling flow path is a separate heat exchanger.