阅读说明：本技术 一种用于驱动模块的散热系统、空调及控制方法 (Heat dissipation system for driving module, air conditioner and control method ) 是由 马旻 黄诚伟 寇芷薇 周卫华 于 2020-12-18 设计创作，主要内容包括：本发明公开了一种用于驱动模块的散热系统、空调及控制方法,其中,所述散热系统包括冷媒降温支路和控制装置；所述冷媒降温支路包括电磁阀、毛细管以及散热板；所述散热板安装在待降温的驱动模块上,所述毛细管的进口端与所述空调制冷循环回路连通,该毛细管自所述散热板中盘绕后,其出口端与所述空调制冷循环回路连通；所述电磁阀设置在所述毛细管的进口端与所述空调制冷循环回路的连通处,用于控制冷媒降温支路的通断；所述控制装置用于检测待降温的驱动模块内的温度以及远离该待降温的驱动模块的温度,以此控制电磁阀的通断。本发明的散热系统可以根据实际需要对驱动模块进行降温,并且具有结构简单、成本低廉以及控制精确的优点。(The invention discloses a heat dissipation system, an air conditioner and a control method for a driving module, wherein the heat dissipation system comprises a refrigerant cooling branch and a control device; the refrigerant cooling branch comprises an electromagnetic valve, a capillary tube and a heat dissipation plate; the cooling plate is arranged on the driving module to be cooled, the inlet end of the capillary tube is communicated with the air-conditioning refrigeration circulation loop, and the outlet end of the capillary tube is communicated with the air-conditioning refrigeration circulation loop after the capillary tube is coiled in the cooling plate; the electromagnetic valve is arranged at the communication position of the inlet end of the capillary tube and the air-conditioning refrigeration cycle loop and is used for controlling the on-off of the refrigerant cooling branch; the control device is used for detecting the temperature in the driving module to be cooled and the temperature far away from the driving module to be cooled so as to control the on-off of the electromagnetic valve. The cooling system can cool the driving module according to actual needs, and has the advantages of simple structure, low cost and accurate control.)

1. A heat dissipation system for a driving module is characterized by comprising a refrigerant cooling branch arranged in an air-conditioning refrigeration cycle loop and a control device, wherein,

the refrigerant cooling branch comprises an electromagnetic valve, a capillary tube and a heat dissipation plate, wherein the heat dissipation plate is arranged on a driving module to be cooled, the inlet end of the capillary tube is communicated with the air-conditioning refrigeration circulation loop, and the outlet end of the capillary tube is communicated with the air-conditioning refrigeration circulation loop after the capillary tube is coiled in the heat dissipation plate; the electromagnetic valve is arranged at the communication position of the inlet end of the capillary tube and the air-conditioning refrigeration cycle loop and is used for controlling the on-off of the refrigerant cooling branch;

the control device is used for detecting the temperature in the driving module to be cooled and the temperature far away from the driving module to be cooled, and the on-off of the electromagnetic valve is controlled.

2. The heat dissipating system for a driver module as set forth in claim 1, wherein the capillary tube is wound on the heat dissipating plate in a vortex-like manner.

3. The heat dissipating system for a driver module of claim 1, wherein the capillary tube is wound on the heat dissipating plate in a serpentine manner.

4. The heat dissipation system for a driving module as claimed in claim 1, wherein the air conditioning refrigeration cycle circuit includes a compressor, a condenser, an electronic expansion valve, and an evaporator, which are sequentially connected, wherein an inlet end of the capillary tube is located on a passage between the condenser and the electronic expansion valve, and an outlet end is located on a passage between the electronic expansion valve and the evaporator.

5. The heat dissipation system for driving module as claimed in claim 1, wherein a heat dissipation glue is disposed between the heat dissipation plate and the driving module to be cooled.

6. The heat dissipation system for a driving module according to claim 1, wherein the heat dissipation plate is a copper or aluminum metal plate.

7. The heat dissipation system for a driving module as claimed in claim 1, wherein the control device comprises a first temperature detector and a second temperature detector, wherein the first temperature detector is disposed inside the driving module to be cooled for detecting the temperature inside the driving module to be cooled; the second temperature detector is arranged at a position far away from the driving module to be cooled and used for detecting the temperature far away from the driving module to be cooled.

8. A control method for the heat dissipation system for the drive module according to any one of claims 1 to 7, characterized by comprising the steps of:

(1) before working, the heat dissipation system is arranged in a driving module to be cooled, and meanwhile, a refrigerant cooling branch is connected in an air conditioner refrigeration circulation loop;

(2) the during operation, when control system detects the inside temperature T1 of the drive module of treating the cooling and keep away from the temperature T2 of the drive module of treating the cooling, realize controlling the break-make of solenoid valve, concrete control step is:

setting an initial temperature T0 and controlling the deviations a and b;

when the temperature T1 detected inside the driving module is less than or equal to T0 or T1 is less than or equal to T2+ b, the electromagnetic valve is closed;

when the temperature T1 detected in the driving module is greater than T0 and T1 is greater than T2+ a, the electromagnetic valve is opened, and the refrigerant cooling branch is communicated with the air-conditioning refrigeration cycle loop;

when the temperature T1 detected inside the driving module is more than T0 and T2+ b is less than T1 and less than T2+, the solenoid valve maintains the former state.

9. The control method of the heat dissipation system for the driving module as set forth in claim 8, wherein the T0 is 50 ℃, a is 0 ℃ and b is 20 ℃.

10. An air conditioner characterized by comprising the heat dissipation system for a drive module according to any one of claims 1 to 8.

Technical Field

The invention relates to an air conditioner, in particular to a heat dissipation system for a driving module, an air conditioner and a control method.

Background

Along with the development of science and technology, inverter air conditioner is popularized gradually in the market, and full direct current inverter air conditioner needs dedicated drive controller in order to drive the operation of compressor or motor, and when compressor or motor operation, drive controller's module can produce the heat, if this part heat can not in time be dispelled, can lead to module temperature to last rising, causes the module to damage. At present, the driving module of the variable frequency air conditioner mostly adopts air cooling heat dissipation, and because the heat dissipation efficiency is limited, particularly under the high-temperature weather condition of T3, the heat dissipation effect is worse, so that the driving module works at a high temperature for a long time, and the reliability of the module is greatly influenced.

In order to solve the above problems, chinese patent application with application publication No. CN105928109A discloses "an air conditioning system with a module heat exchange device and an air conditioner with the same", wherein the air conditioning system includes an outdoor heat exchanger, an indoor heat exchanger, and a throttling component arranged between the outdoor heat exchanger and the indoor heat exchanger and on a main refrigerant pipeline without a compressor, the module heat exchange device is further arranged between the throttling component and the outdoor heat exchanger or between the throttling component and the indoor heat exchanger, and the air conditioning system further includes a valve branch control system for controlling the air conditioning system to ensure that the refrigerant flows from the module heat exchange device to the throttling component under the cooling and heating modes. Therefore, the air conditioning system can enable the heat pump type air conditioner with only one throttling component to realize that the module can be cooled by cooling media before throttling in the cooling and heating modes, and effectively prevents the condition that the temperature near the cooling media pipe and the module is lower than the dew point temperature of air to generate condensation near the module.

However, the above-mentioned piping structure is too complicated; and because the main path refrigerant is used for module heat dissipation, the modules are cooled after the air conditioning system is started, but some modules do not need heat dissipation and temperature reduction, so the modules can not work normally, and the working performance of the unit is influenced.

Disclosure of Invention

The invention provides a heat dissipation system for a driving module in order to overcome the defects in the prior art, the heat dissipation system can cool the driving module according to actual needs, and has the advantages of simple structure, low cost and accurate control.

A second object of the present invention is to provide a control method for a heat dissipation system of a driving module.

A third object of the present invention is to provide an air conditioner to which the heat dissipation system is applied.

The technical scheme for solving the technical problems is as follows:

a heat dissipation system for a driving module comprises a refrigerant cooling branch arranged in a refrigeration cycle loop of an air conditioner and a control device, wherein,

the refrigerant cooling branch comprises an electromagnetic valve, a capillary tube and a heat dissipation plate, wherein the heat dissipation plate is arranged on a driving module to be cooled, the inlet end of the capillary tube is communicated with the air-conditioning refrigeration circulation loop, and the outlet end of the capillary tube is communicated with the air-conditioning refrigeration circulation loop after the capillary tube is coiled in the heat dissipation plate; the electromagnetic valve is arranged at the communication position of the inlet end of the capillary tube and the air-conditioning refrigeration cycle loop and is used for controlling the on-off of the refrigerant cooling branch;

the control device is used for detecting the temperature in the driving module to be cooled and the temperature far away from the driving module to be cooled, and the on-off of the electromagnetic valve is controlled.

Preferably, the capillary tube is wound on the heat dissipation plate in a vortex-like manner.

Preferably, the capillary tube is wound on the heat dissipation plate in a serpentine manner.

Preferably, the air-conditioning refrigeration cycle loop comprises a compressor, a condenser, an electronic expansion valve and an evaporator which are sequentially communicated, wherein the inlet end of the capillary tube is positioned on a channel between the condenser and the electronic expansion valve, and the outlet end of the capillary tube is positioned on a channel between the electronic expansion valve and the evaporator.

Preferably, a heat dissipation glue is arranged between the heat dissipation plate and the drive module to be cooled.

Preferably, the heat dissipation plate is a copper or aluminum metal plate.

Preferably, the control device includes a first temperature detector and a second temperature detector, wherein the first temperature detector is disposed inside the driving module to be cooled and is configured to detect a temperature inside the driving module to be cooled; the second temperature detector is arranged at a position far away from the driving module to be cooled and used for detecting the temperature far away from the driving module to be cooled.

A control method for a heat dissipation system of a drive module, comprising the steps of:

(1) before working, the heat dissipation system is arranged in a driving module to be cooled, and meanwhile, a refrigerant cooling branch is connected in an air conditioner refrigeration circulation loop;

(2) the during operation, when control system detects the inside temperature T1 of the drive module of treating the cooling and keep away from the temperature T2 of the drive module of treating the cooling, realize controlling the break-make of solenoid valve, concrete control step is:

setting an initial temperature T0 and controlling the deviations a and b;

when the temperature T1 detected inside the driving module is less than or equal to T0 or T1 is less than or equal to T2+ b, the electromagnetic valve is closed;

when the temperature T1 detected in the driving module is greater than T0 and T1 is greater than T2+ a, the electromagnetic valve is opened, and the refrigerant cooling branch is communicated with the air-conditioning refrigeration cycle loop;

when the temperature T1 detected inside the driving module is more than T0 and T2+ b is less than T1 and less than T2+, the solenoid valve maintains the former state.

Preferably, the T0 is 50 ℃, a is 0 ℃ and b is 20 ℃.

An air conditioner comprises the heat dissipation system for the driving module.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the cooling system cools the driving module to be cooled by utilizing the refrigerant of the air-conditioning refrigeration circulation loop, and detects the temperature inside the driving module to be cooled and the temperature far away from the driving module to be cooled through the control device to realize the control of the electromagnetic valve so as to control the connection and disconnection between the refrigerant cooling branch and the air-conditioning refrigeration circulation loop, thereby realizing the accurate cooling of the driving module to be cooled; in addition, the heat dissipation system has the advantages of simple structure, uniform heat dissipation and low cost.

2. The capillary tube in the heat dissipation system is coiled in the heat dissipation plate, so that the heat exchange area is increased, the refrigerant flow is longer, the coverage area is wider, the driving module is cooled more uniformly and thoroughly, and the cooling effect is better.

3. The control device in the heat dissipation system controls the electromagnetic valve, and can effectively avoid the phenomena of condensation and damage to circuits and components caused by over-quick temperature reduction.

Drawings

Fig. 1 is a schematic diagram of a heat dissipation system for a driving module according to the present invention.

Fig. 2 shows the manner in which the capillary tube is wound.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Example 1

Referring to fig. 1-2, the heat dissipation system for a driving module of the present invention includes a refrigerant cooling branch disposed in a refrigeration cycle of an air conditioner and a control device, wherein,

the refrigerant cooling branch comprises an electromagnetic valve 3, a capillary tube 8 and a heat dissipation plate 9, wherein the heat dissipation plate 9 is installed in the driving module 4 to be cooled, the inlet end of the capillary tube 8 is communicated with the air-conditioning refrigeration circulation loop, and the outlet end of the capillary tube 8 is communicated with the air-conditioning refrigeration circulation loop after being coiled in the heat dissipation plate 9; the electromagnetic valve 3 is arranged at the communication position of the inlet end of the capillary tube 8 and the air-conditioning refrigeration cycle loop and is used for controlling the on-off of the refrigerant cooling branch;

the control device is used for detecting the temperature in the driving module 4 to be cooled and the temperature far away from the driving module 4 to be cooled so as to control the on-off of the electromagnetic valve 3, and comprises a first temperature detector and a second temperature detector, wherein the first temperature detector is arranged inside the driving module 4 to be cooled and used for detecting the temperature inside the driving module 4 to be cooled; the second temperature detector is arranged at a position far away from the driving module 4 to be cooled and used for detecting the temperature far away from the driving module 4 to be cooled.

In this embodiment, the capillary 8 is wound around the heat sink 9 in a vortex manner. Can increase heat transfer area like this, make the refrigerant flow longer simultaneously, area coverage is wider, and is more even thorough to drive module's cooling, and the cooling effect is better.

Referring to fig. 1-2, the air conditioning refrigeration cycle includes a gas separator 7, a compressor 6, a condenser 1, an electronic expansion valve 2, and an evaporator 5, which are sequentially connected, wherein an inlet end of the capillary tube 8 is located on a passage between the condenser 1 and the electronic expansion valve 2, and an outlet end is located on a passage between the electronic expansion valve 2 and the evaporator 5.

Referring to fig. 1-2, a heat dissipation adhesive is disposed between the heat dissipation plate 9 and the driving module 4 to be cooled, and by disposing the heat dissipation adhesive, heat exchange between the heat dissipation plate 9 and the driving module 4 to be cooled can be better achieved, so that better heat dissipation is achieved.

In addition, the material of the heat dissipation plate 9 in this embodiment may be any material with good heat conductivity, and is preferably a metal plate made of copper or aluminum, so that the heat dissipation effect is better and the cost is lower.

Referring to fig. 1 to 2, the control method of the heat dissipation system for a driving module of the present invention includes the steps of:

(1) before working, the heat dissipation system is arranged in a driving module 4 to be cooled, and meanwhile, a refrigerant cooling branch is connected in an air conditioner refrigeration circulation loop;

(2) the during operation, when control system detects the inside temperature T1 of the drive module 4 of treating the cooling and keep away from the temperature T2 of the drive module 4 of treating the cooling, realize controlling solenoid valve 3's break-make, concrete control step is: setting an initial temperature T0 and controlling the deviations a and b; here, although the initial temperature T0 may be cancelled, without this control value, when the loop temperature is low, the temperature of the driving module does not rise to the extent that cooling is required, and the cooling medium may be turned on to dissipate heat, which affects the unit capability, so the initial temperature T0 needs to be set separately;

when the temperature T1 detected inside the driving module is less than or equal to T0 or T1 is less than or equal to T2+ b, the electromagnetic valve 3 is closed;

when the temperature T1 detected in the driving module is more than T0 and T1 is more than T2+ a, the electromagnetic valve 3 is opened, and the refrigerant cooling branch is communicated with the air-conditioning refrigeration cycle loop;

when the temperature T1 detected inside the driving module is more than T0 and T2+ b is less than T1 and less than T2+, the solenoid valve 3 maintains the former state.

Referring to fig. 1 and 2, the operation principle of the heat dissipation system for a driving module of the present invention is:

take to dispel the heat and cool down to frequency conversion drive module as an example:

after cooling a refrigerant in the air-conditioning refrigeration cycle loop through a condenser 1, leading a refrigerant cooling branch to a variable-frequency driving module to be cooled before entering an electronic expansion valve 2 for throttling; because frequency conversion drive module is located the electric cabinet, and hugs closely the electric cabinet sheet metal component, consequently in the same position department laminating heating panel 9 in the electric cabinet outside, this frequency conversion drive module does not restrict the concrete position that is located the electric cabinet, nevertheless need closely laminate with any side of electric cabinet sheet metal component, in order to realize better radiating effect, can beat on both contact surfaces and dispel the heat and glue.

The electromagnetic valve 3 controls the on-off of the refrigerant in the refrigerant cooling branch, and the capillary tube 8 enters the heat dissipation plate 9 and is coiled in the heat dissipation plate 9, so that the refrigerant flows through the coiled capillary tube 8 to simultaneously generate throttling and cooling effects, and the gap between the capillary tube 8 and the heat dissipation plate 9 is filled with heat dissipation glue, thereby enhancing the heat exchange effect. After the refrigerant flows out of the heat dissipating plate 9 (while the throttling is completed), the refrigerant is led back to the air conditioning refrigeration cycle circuit through the capillary tube 8.

In the process, the on-off of the electromagnetic valve 3 in the refrigerant cooling branch is controlled by two temperature detection values after judgment, wherein one temperature detection value is the detection temperature T1 inside the variable frequency driving module, the other temperature detection value is the temperature T2 which is arranged in the electric cabinet and is far away from the heating component, the position of the temperature sensing bulb in the electric cabinet is not limited, and the temperature sensing bulb is arranged far away from a unit control board. The specific control method of the electromagnetic valve 3 is as follows: an initial temperature T0 is set, and the deviations a and b are controlled. Firstly, when the driving internal detection temperature T1 is less than or equal to T0 or T1 is less than or equal to T2+ b, the electromagnetic valve 3 is closed; when T1 is more than T0 and T1 is more than T2+ a, the electromagnetic valve 3 is opened, and the refrigerant cooling branch is communicated with the air-conditioning refrigeration cycle loop; ③ when T1 is more than T0 and T2+ b is more than T1 and less than or equal to T2+, the electromagnetic valve 3 maintains the former state.

According to the control method, the aim can be achieved that when the variable frequency driving module generates heat seriously, the temperature is quickly reduced through the refrigerant in time, and after the heat productivity of the variable frequency driving module is smaller or the cooling effect of the refrigerant is achieved, the refrigerant in the refrigerant cooling branch is disconnected, so that the whole pressure and temperature of the unit are prevented from being influenced. Because the capillary tube 8 has good heat exchange effect in the metal plate, the frequent on-off of the electromagnetic valve 3 can be avoided by giving a temperature control deviation.

Example 2

This embodiment is different from embodiment 1 in that the capillary 8 is wound on the heat radiating plate 9 in a serpentine manner.

Example 3

The air conditioner comprises the heat dissipation system for the driving module.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.