CN203489401U - Variable frequency air conditioner and variable frequency module cooling system thereof - Google Patents

Abstract

The utility model discloses a variable frequency module cooling system comprising a variable frequency module and a cooling device, wherein the cooling device is communicated with a main cooling pipeline. The variable frequency module cooling system further comprises a throttling device, an inlet of the throttling device is communicated with the main cooling pipeline, and an outlet of the throttling device is communicated with the inlet end of the cooling device. The utility model further provides a variable frequency air conditioner comprising the main cooling pipeline, the variable frequency module cooling system and a compressor. By means of the variable frequency air conditioner and the variable frequency module cooling system of the variable frequency air conditioner, as the throttling device is arranged at the inlet end of the cooling device, the temperature of cold media passing through the throttling device is decreased under the throttling function of the throttling device, the temperature difference between the cold media and the variable frequency module is increased, and therefore the heat transfer efficiency of the variable frequency module can be improved, and normal operation of the compressor can be ensured.

Description

A frequency conversion air conditioner and its frequency conversion module cooling system

technical field

The utility model relates to the technical field of refrigeration, in particular to a frequency conversion air conditioner and a frequency conversion module cooling system thereof.

Background technique

With the advancement of science and technology, inverter air conditioners are gradually accepted by consumers because of their good energy-saving properties.

Inverter air conditioners mainly change the frequency of the power supply through the inverter, thereby changing the operating speed of the compressor, and can automatically provide the required cooling (heating) capacity according to the room conditions; when the indoor temperature reaches the desired value, the compressor can maintain this temperature. Constant speed operation to achieve "non-stop operation", thus ensuring the stability of the ambient temperature.

Because there are many components with high heat generation in the frequency converter, in order to avoid the heat accumulation and cause the frequency converter to not work normally, it is necessary to cool the frequency converter.

Please refer to FIG. 1 . FIG. 1 is a flow chart of an inverter cooling system in the prior art. In the existing technology, the inverter cooling device 01 is installed in the main cooling pipeline 02 of the inverter air conditioner, and the cooling medium in the main cooling pipeline 02 enters the inverter cooling device 01 to achieve the purpose of cooling the inverter through heat exchange. After heat exchange, the refrigerant medium enters the heat exchanger through the main cooling pipeline 02 for cooling, and finally the refrigerant medium flows into the compressor 03 .

The cold medium in the main cooling pipeline 02 of the inverter air conditioner first exchanges heat through the heat exchanger of the outdoor unit to reduce the temperature of the cold medium. However, when the external ambient temperature is high, the heat exchange efficiency of the cold medium is low, and the The high temperature means that the temperature of the cooling medium flowing into the inverter cooling device 01 is high, resulting in poor cooling effect of the inverter, and overheating of the inverter will cause the compressor 03 to fail to work normally, and eventually cause the cooling operation capacity of the inverter air conditioner to decline.

Therefore, how to improve the heat exchange efficiency of the frequency conversion module is a technical problem to be solved by those skilled in the art.

Utility model content

The purpose of the utility model is to provide an inverter air conditioner and its inverter module cooling system, which can improve the heat exchange efficiency of the inverter module and ensure the normal operation of the compressor.

A frequency conversion module cooling system provided by the utility model includes a frequency conversion module and its cooling device, the cooling device communicates with the main cooling pipeline, and also includes a throttling device, the inlet of the throttling device is connected to the main cooling The pipelines are connected, and the outlet of the throttling device is connected with the inlet end of the cooling device.

Preferably, it also includes a branch cooling pipeline, the inlet of the branch cooling pipeline communicates with the main cooling pipeline, the outlet of the branch cooling pipeline communicates with the inlet of the throttling device, and the outlet of the throttling device It communicates with the inlet port of the cooling device.

Preferably, a heat exchanger is also included, the inlet of the heat exchanger communicates with the main cooling pipeline, and communicates with the outlet end of the cooling device, and the outlet of the heat exchanger is connected with the inlet of the compressor Pass.

Preferably, the throttling device is an electronic expansion valve.

Preferably, the frequency conversion module is a frequency converter.

Preferably, the heat exchanger is a plate heat exchanger.

At the same time, the utility model also provides a frequency conversion air conditioner, which includes a main cooling pipeline, a frequency conversion module cooling system and a compressor, and the frequency conversion module cooling system is the frequency conversion module cooling system mentioned above.

A frequency conversion module cooling system provided by the utility model includes a frequency conversion module and its cooling device, and also includes a throttling device, wherein the inlet of the throttling device is connected with the main cooling pipeline, and the outlet of the throttling device is connected to the inlet of the cooling device. end-to-end connection. In this way, by setting a throttling device at the inlet end of the cooling device, the temperature of the refrigerant medium passing through the throttling device is reduced by the throttling effect of the throttling device, so that the refrigerant medium in the main cooling pipeline first passes through the throttling device. The effect is to reduce the temperature and increase the temperature difference between the cooling medium and the frequency conversion module, thereby improving the heat exchange efficiency between the cooling medium and the frequency conversion module, which is comparable to the high-temperature cooling medium in the main cooling pipeline directly flowing into the cooling device of the frequency conversion module in the prior art. The throttling effect of the throttling device can reduce the temperature of the cold medium flowing into the cooling device, so as to improve the heat exchange efficiency of the frequency conversion module, thereby ensuring the normal operation of the compressor.

At the same time, the utility model also provides a frequency conversion air conditioner, which includes a main cooling pipeline and a compressor, and also includes the frequency conversion module cooling system as described above. The beneficial effect achieved by the frequency conversion air conditioner is the same as the beneficial effect achieved by the frequency conversion module cooling system above, and the derivation process of the two is similar, so it will not be repeated in this paper.

Description of drawings

Fig. 1 is the flow chart of a kind of frequency converter cooling system in the prior art;

Fig. 2 is a flow chart of the frequency conversion module cooling system in a specific embodiment provided by the present invention;

Among them, in Figure 1:

Inverter cooling device 01, main cooling pipeline 02, compressor 03;

In Figure 2:

Cooling device 1, main cooling pipeline 2, electronic expansion valve 3, branch cooling pipeline 4, plate heat exchanger 5, compressor 6.

Detailed ways

The core of the utility model is to provide an inverter air conditioner and its inverter module cooling system, which can improve the heat exchange efficiency of the inverter module and ensure the normal operation of the compressor.

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 2 . FIG. 2 is a flow chart of the cooling system of the frequency conversion module in a specific embodiment provided by the present invention.

This specific embodiment provides a frequency conversion module cooling system, including a frequency conversion module and its cooling device 1, and also includes a throttling device, wherein the inlet of the throttling device communicates with the main cooling pipeline 2, and the outlet of the throttling device communicates with the cooling The inlet ports of device 1 are connected. Since the pressure of the refrigerant medium in the main cooling pipeline 2 is relatively high (in a liquid state), when the high-pressure refrigerant medium flows through the throttling device, a low-temperature and low-pressure refrigerant medium is finally formed. Since the throttling effect of the throttling device can reduce the temperature of the refrigerant passing through the throttling device, by setting the throttling device at the inlet end of the cooling device 1, the refrigerant in the main cooling pipeline 2 first passes through the throttling device. The cooling effect of the flow can increase the temperature difference between the cooling medium and the frequency conversion module, thereby improving the heat exchange efficiency of the frequency conversion module.

Compared with the high-temperature refrigerant medium in the main cooling pipeline 02 flowing directly into the inverter cooling device 01 in the prior art, in this specific embodiment, the throttling effect of the throttling device can reduce the temperature of the refrigerant medium flowing into the cooling device 1, In order to improve the heat exchange efficiency between the cooling medium and the frequency conversion module, and thus ensure the normal operation of the compressor 6 .

It should be noted that, in this specific embodiment, the frequency conversion module is a frequency converter, and the cooling medium in the cooling device 1 is used to exchange heat with the heat-generating components of the frequency converter to reduce the temperature of the frequency converter, so as to ensure the normal use of the frequency converter .

In a further solution, it also includes a branch cooling pipeline 4, wherein the inlet of the branch cooling pipeline 4 communicates with the main cooling pipeline 2, the outlet of the branch cooling pipeline 4 communicates with the inlet of the throttling device, and the outlet of the throttling device communicates with the inlet of the throttling device. The inlet ends of the cooling device 1 are connected. In this way, the refrigerant in the main cooling pipeline 2 flows into the throttling device through the branch cooling pipeline 4, and after being cooled by throttling, it flows into the cooling device 1, exchanges heat with the frequency converter, and finally flows out through the outlet of the cooling device 1. By arranging the branch cooling pipeline 4, only a part of the cooling medium in the main cooling pipeline 2 is throttled and cooled, so that the cooling effect of the cooling medium entering the cooling device 1 can be ensured.

It should be noted that, in this specific embodiment, the throttling device is an electronic expansion valve 3. By setting the electronic expansion valve 3, the temperature of the refrigerant medium flowing into the cooling device 1 can be reduced, or by controlling the opening of the electronic expansion valve 3. Quickly and effectively control the flow of the cooling medium entering the cooling device 1 to ensure the cooling effect of the cooling device 1, and then control the temperature of the inverter to ensure the normal operation of the entire cooling system of the inverter air conditioner. Of course, other throttling devices, such as throttling valves, can also be used according to actual production conditions.

In addition, the frequency conversion module cooling system also includes a plate heat exchanger 5, the main cooling pipeline 2 is connected to the inlet of the plate heat exchanger 5, and the outlet end of the cooling device 1 is also connected to the inlet of the plate heat exchanger 5. The outlet of the heater 5 communicates with the inlet of the compressor 6 . In this way, the refrigerant medium in the main cooling pipeline 2 and the refrigerant medium entering the cooling device 1 finally flow into the plate heat exchanger 5, and the above two parts of the refrigerant medium flow into the plate heat exchanger 5, and the temperature of the refrigerant medium can be reduced through heat exchange. , to ensure that the temperature and pressure of the cooling medium meet the working requirements of the compressor 6, which can further ensure the normal operation of the compressor 6, thereby ensuring the normal operation of the entire cooling system of the inverter air conditioner.

It should be noted that the plate heat exchanger 5 is used as the heat exchanger in this specific embodiment, and of course it does not rule out the use of other forms of heat exchangers according to actual needs.

At the same time, an inverter air conditioner is provided in this specific embodiment, including the main cooling pipeline 2, the compressor 6, and the inverter module cooling system as described above, wherein the cold medium is transmitted to the branch cooling through the main cooling pipeline 2. Pipeline 4, a part of the refrigerant medium is transmitted to the cooling device 1 through the branch cooling pipeline 4 to cool the frequency converter, and finally flows into the plate heat exchanger 5 through the outlet of the cooling device 1; the remaining refrigerant medium is transmitted to the plate heat exchanger 5 through the main cooling pipeline 2 In the heat exchanger 5, the two parts of the cold medium meet and exchange heat in the plate heat exchanger 5 to lower their own temperature, and finally enter the compressor 6 through the pipe connecting the plate heat exchanger 5 and the compressor 6; the cold medium passes through After the compressor 6, the circulation of the next cooling process is performed, which will not be introduced one by one here. The beneficial effect achieved by the frequency conversion air conditioner is the same as the beneficial effect achieved by the frequency conversion module cooling system above, and the derivation process of the two is similar, so it will not be repeated in this paper.

The inverter air conditioner and its inverter module cooling system provided by the utility model have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (7)

1. A frequency conversion module cooling system, including a frequency conversion module and its cooling device, the cooling device (1) communicated with the main cooling pipeline (2), characterized in that it also includes a throttling device, the throttling device The inlet is connected with the main cooling pipeline (2), and the outlet of the throttling device is connected with the inlet end of the cooling device (1). 2. The frequency conversion module cooling system according to claim 1, characterized in that it further comprises a branch cooling pipeline (4), the inlet of the branch cooling pipeline (4) is connected with the main cooling pipeline (2), and the The outlet of the branch cooling pipeline (4) communicates with the inlet of the throttling device, and the outlet of the throttling device communicates with the inlet of the cooling device (1). 3. The frequency conversion module cooling system according to claim 2, characterized in that it also includes a heat exchanger, the inlet of the heat exchanger communicates with the main cooling pipeline (2), and at the same time communicates with the cooling device ( 1) is connected to the outlet end, and the outlet of the heat exchanger is connected to the inlet of the compressor (6). 4. The frequency conversion module cooling system according to claim 2, characterized in that the throttling device is an electronic expansion valve (3). 5. The frequency conversion module cooling system according to claim 1, wherein the frequency conversion module is a frequency converter. 6. The frequency conversion module cooling system according to claim 3, characterized in that the heat exchanger is a plate heat exchanger (5). 7. An inverter air conditioner, comprising a main cooling pipeline (2), an inverter module cooling system and a compressor (6), characterized in that the inverter module cooling system is an inverter module according to any one of claims 1 to 6 cooling system.

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