An automotive heat pump air conditioner outdoor unit and its heat dissipation control method

Abstract

The present invention discloses an outdoor unit of an automotive heat pump air conditioner and its heat dissipation control method. The outdoor unit of the air conditioner includes a frame and an outdoor unit assembly of the air conditioner. The frame includes a top plate, a water receiving tray, a chassis, and side partitions. The top plate and the chassis are arranged opposite to each other. The water receiving tray is arranged between the top plate and the chassis. The side partitions are vertically arranged on one side of the water receiving tray. A first cavity is formed between the water receiving tray and the top plate, a second cavity is formed between the water receiving tray and the chassis, and a third cavity is formed between the outer side of the side partition and the top plate and the chassis. An external blower is provided on the top plate, an external radiator is provided in the first cavity, and the outdoor unit assembly is arranged in the second cavity and the third cavity. A drainage joint is provided in the water receiving tray, and a cooling water pipe is further provided in the second cavity. One end of the cooling water pipe is connected to the drainage joint, and the other end of the cooling water pipe passes through the chassis and communicates with the outside. The present invention has low energy consumption, is beneficial to energy conservation, has good heat dissipation effect, and simple control.

Description

Technical Field

[0001] The invention relates to the field of automobile air conditioners, and in particular to an automobile heat pump air conditioner outdoor unit and a heat dissipation control method thereof. Background Art

[0002] With the increasing problems of environmental pollution and energy shortage, new energy vehicles have received more and more attention. With the development of automobile air-conditioning technology, heat pump air-conditioning technology has become increasingly mature, and has broad application prospects and value in new energy vehicles. However, the performance of automobile heat pump air-conditioning in low temperature environments is currently unstable, with low heating efficiency and high energy consumption, which affects the overall performance of the vehicle, especially pure electric vehicles, affects the cruising range, and is not conducive to the economy of the vehicle. In order to respond to the global call for the development of automobile energy conservation, it is necessary to study more efficient and energy-saving heat pump air-conditioning under the trend of development, especially in the heat dissipation mode, to reduce the energy consumption of heat pump air-conditioning as much as possible. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an automobile heat pump air conditioner outdoor unit, which has low energy consumption, is beneficial to energy saving, has good heat dissipation effect and is simple to control.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A car heat pump air-conditioning outdoor unit, characterized in that it includes a frame and an air-conditioning outdoor unit assembly arranged on the frame; wherein the frame includes a top plate, a water receiving pan, a bottom plate and a side partition, the top plate and the bottom plate are arranged opposite to each other, the water receiving pan is arranged between the top plate and the bottom plate, and the side partition is vertically arranged on one side of the water receiving pan; a first cavity is formed between the water receiving pan and the top plate, a second cavity is formed between the water receiving pan and the bottom plate, and a third cavity is formed between the outer side of the side partition and the top plate and the bottom plate; an external fan is arranged on the top plate, an external radiator is arranged in the first cavity, and the air-conditioning outdoor unit assembly is arranged in the second cavity and the third cavity; a drainage joint is arranged in the water receiving pan, and a cooling water pipe is also arranged in the second cavity, one end of the cooling water pipe is connected to the drainage joint, and the other end of the cooling water pipe passes through the bottom plate and communicates with the outside.

[0006] The working principle of the above-mentioned automobile heat pump air conditioner outdoor unit is:

[0007] When the air conditioner is running to dissipate heat, the external radiator arranged in the first cavity works, and the condensed water generated by it will be collected in the water collecting pan; at the same time, rainwater on rainy days will also drip into the water collecting pan through the external fan arranged on the top plate; at this time, the condensed water or rainwater collected in the water collecting pan flows into the cooling water pipe through the drainage joint, and flows through the second cavity under the action of gravity, and finally gradually flows out of the outside of the chassis, thereby realizing liquid cooling and heat dissipation treatment of the air conditioner outdoor unit component in the second cavity.

[0008] In a preferred embodiment of the present invention, a control box fan is provided in the second chamber, and the control box fan is disposed below the control box of the outdoor unit assembly of the air conditioner.

[0009] Preferably, a power supply fan is further provided in the second chamber, and the power supply fan is disposed below the power supply of the outdoor unit assembly of the air conditioner.

[0010] In a preferred embodiment of the present invention, a water pressure sensor is provided on the water receiving tray, and the water pressure sensor is used to detect the water pressure on the water receiving tray, and the water pressure sensor is electrically connected to the control box of the outdoor unit of the air conditioner.

[0011] In a preferred embodiment of the present invention, a plurality of drainage joints are provided on the water receiving tray, and a plurality of cooling water pipes are provided in the second chamber.

[0012] In a preferred embodiment of the present invention, the outdoor unit assembly provided in the second chamber includes a control box, a power supply and a compressor. The control box includes a slave control box and a main control box, and the main control box is disposed above the slave control box.

[0013] In a preferred embodiment of the present invention, the outdoor unit assembly provided in the third chamber includes a gas-liquid separator, a gas supplement tank and a wiring board.

[0014] In a preferred embodiment of the present invention, it further includes a housing, and the housing includes a front panel, a rear panel and side panels, and the front panel, the rear panel and the side panels enclose the frame.

[0015] In a preferred embodiment of the present invention, the external radiator is inclined and disposed in the first chamber.

[0016] A method for controlling the heat dissipation of an outdoor unit of an automotive heat pump air conditioner, characterized by comprising the following steps:

[0017] (1) The water pressure sensor monitors the water pressure of the cooling water volume on the water receiving tray, wherein the cooling water volume includes the condensed water and rainwater generated by the external radiator;

[0018] (2) When the water pressure value monitored by the water pressure sensor is greater than or equal to a preset K value, it is determined that the cooling water volume in the water receiving tray is sufficient to meet the heat dissipation requirement, and the cooling water on the water receiving tray is drained through the cooling water pipe into the second chamber to dissipate heat from the control box and the power supply;

[0019] (3) When the water pressure value monitored by the water pressure sensor is less than the preset K value, it is determined that the cooling water volume in the water receiving tray is insufficient; at this time, the water pressure sensor feeds back an air-cooled heat dissipation signal to the control box, and the control box issues an air-cooled signal, so that the control box fan and the power supply fan operate to achieve air-cooled enhanced heat dissipation.

[0020] The present invention has the following beneficial effects compared with the prior art:

[0021] 1. By re - arranging the internal components of the outdoor unit of the air conditioner, the present invention utilizes condensed water and rainwater to conduct liquid - cooling heat dissipation for the control box and power supply of the outdoor unit of the air conditioner, effectively reducing energy consumption, being beneficial to energy conservation, and thus being beneficial to reducing the impact on the driving range of the vehicle.

[0022] 2. The heat - dissipation control of the present invention is simple. It can be supplemented by liquid - cooling and air - cooling, and the two are combined for heat dissipation to ensure the heat - dissipation effect, avoid over - high temperature, and is beneficial to the normal operation of the outdoor unit of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figures 1-4 It is a schematic structural diagram of one specific embodiment of the outdoor unit of the automotive heat pump air conditioner of the present invention, where Figure 1 is a perspective view, Figure 2 is a perspective view after removing the outer shell, Figure 3 is a front view after removing the outer shell, Figure 4 is an exploded view of the outer shell.

[0024] Figure 5 It is a flowchart of the heat - dissipation control method of the outdoor unit of the automotive heat pump air conditioner of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present invention will be further described below in conjunction with the embodiments and the drawings, but the embodiments of the present invention are not limited thereto.

[0026] Referring to Figures 1-4 , the outdoor unit of the automotive heat pump air conditioner of this embodiment includes a frame and an outdoor unit component arranged on the frame; wherein, the frame includes a top plate 2, a water - receiving tray 4, a chassis 6 and side partitions 13. The top plate 2 and the chassis 6 are arranged oppositely. The water - receiving tray 4 is arranged between the top plate 2 and the chassis 6. The side partitions 13 are vertically arranged on one side of the water - receiving tray 4. A first cavity 26 is formed between the water - receiving tray 4 and the top plate 2, a second cavity 27 is formed between the water - receiving tray 4 and the chassis 6, and a third cavity is formed between the outer side of the side partition 13 and the top plate 2 and the chassis 6. An external blower 1 is arranged on the top plate 2, an external radiator 3 is arranged in the first cavity 26, and the outdoor unit component is arranged in the second cavity 27 and the third cavity. A drain joint 24 is arranged in the water - receiving tray 4, and a cooling water pipe is also arranged in the second cavity 27. One end of the cooling water pipe is connected to the drain joint 24, and the other end of the cooling water pipe passes through the chassis 6 and communicates with the outside. In this embodiment, a side plate 25 is further arranged on the other side of the water - receiving tray 4, and the side plate 25 is arranged oppositely to the side partition 13.

[0027] Referring to Figures 1-4, a control box fan 19 is provided in the second chamber 27, and the control box fan 19 is arranged below the control box of the air conditioner outdoor unit assembly. By providing the control box fan 19, the control box of the air conditioner outdoor unit assembly can be further cooled. The control box has a high operating frequency and generates a lot of heat. Therefore, by providing the control box fan 19 and combining with the liquid cooling treatment of the cooling water pipe, it is beneficial to quickly reduce the temperature of the control box and ensure the normal operation of the air conditioner outdoor unit.

[0028] See Figures 2-3 , a power supply fan 22 is also provided in the second chamber 27, and the power supply fan 22 is arranged below the power supply 23 of the air conditioner outdoor unit assembly. By providing the power supply fan 22, the temperature of the power supply 23 can be quickly reduced, preventing the temperature of the power supply 23 from being too high and affecting the operation of the air conditioner outdoor unit, and ensuring safety to avoid the power supply 23 from being burned out.

[0029] See Figures 2-3 , a water pressure sensor 21 is provided on the water receiving tray 4, and the water pressure sensor 21 is used to detect the water pressure on the water receiving tray 4 and is electrically connected to the control box of the air conditioner outdoor unit. In this embodiment, the water pressure sensor 21 is arranged at the bottom of the water receiving tray 4. By providing the water pressure sensor 21, the water pressure (water volume) on the water receiving tray 4 can be monitored in real time. If the water pressure is greater than or equal to the preset value, liquid cooling is directly used for heat dissipation; if the water pressure is less than the preset value, it is fed back to the control box, and the relevant fans are controlled by the control box to operate, combining liquid cooling and air cooling to dissipate heat from the air conditioner outdoor unit, ensuring the heat dissipation effect while reducing energy consumption.

[0030] See Figures 2-3 , there are multiple drain connectors 24 on the water receiving tray 4, and there are multiple cooling water pipes arranged in the second chamber 27. By providing multiple drain connectors 24 and cooling water pipes, the drainage paths of the cooling water pipes in the second chamber 27 are more diverse and rich, so as to effectively cool and dissipate heat from different components and improve the heat dissipation effect. In this embodiment, the number of drain connectors 24 on the water receiving tray 4 is 4, and the number of cooling water pipes is 4. The cooling water pipes include a first cooling water pipe 7, a second cooling water pipe 8, a third cooling water pipe 9, and a fourth cooling water pipe 12.

[0031] See Figures 2-3 , the air conditioner outdoor unit assembly arranged in the second chamber 27 includes a control box, a power supply 23, and a compressor 5. The control box includes a slave control box 18 and a master control box 20, and the master control box 20 is arranged above the slave control box 18. In this embodiment, the control box fan 19 is arranged below the slave control box 18; in addition, the air conditioner outdoor unit assembly in the second chamber 27 further includes a four-way valve 10 and a gas charging valve 11.

[0032] See Figures 2-3, the air conditioner outdoor unit assembly disposed in the third chamber includes a gas-liquid separator 14, a gas replenishing tank 16, and a wiring board 17. In this embodiment, a stop valve 15 is provided in the gas replenishing tank 16; the gas replenishing port on the compressor 5 in the second chamber 27 is connected to the gas replenishing valve 11 and then connected to the gas replenishing tank 16, so that the air conditioner has the function of gas replenishing and enthalpy increase, ensuring the advantage of maintaining high energy efficiency at low temperatures.

[0033] See Figure 1 and Figure 4 , further includes a housing, which includes a front panel 29, a rear panel 30, and side panels 31. The front panel 29, the rear panel 30, and the side panels 31 enclose the frame. Through the setting of the housing, a relatively enclosed space is formed inside the entire air conditioner outdoor unit, which is beneficial to protecting the components inside the air conditioner outdoor unit.

[0034] See Figure 2 , the external radiator 3 is inclined and disposed in the first chamber 26. By inclining the external radiator 3, the condensed water generated during the operation and heat dissipation of the external radiator 3 can slide down to the water receiving tray 4 along the trend for the water receiving tray 4 to collect, and then is drained to the second chamber 27 through the cooling water pipe for cooling and heat dissipation.

[0035] See Figures 1-4 , the working principle of the automotive heat pump air conditioner outdoor unit in this embodiment is:

[0036] When the air conditioner operates for heat dissipation, the external radiator 3 disposed in the first chamber 26 works, and the condensed water generated by it will be collected in the water receiving tray 4; at the same time, the rainwater on rainy days will also be dripped into the water receiving tray 4 through the external fan 1 disposed on the top plate 2; at this time, the condensed water or rainwater collected in the water receiving tray 4 flows into the cooling water pipe through the drainage joint 24, and flows through the second chamber 27 under the action of gravity, and finally gradually discharges to the outside through the chassis 6, so as to realize the liquid cooling heat dissipation treatment for the air conditioner outdoor unit assembly in the second chamber 27. The cooling water pipe in this embodiment passes through the corresponding positions of the control box and the power supply 23, so that the liquid cooling heat dissipation treatment can be effectively carried out on it. At the same time, when the water pressure sensor 21 monitors that the water volume on the water receiving tray 4 is insufficient, the control box fan 19 and the power supply fan 22 start to operate for air cooling reinforcement. Through the combination of liquid cooling and air cooling, the control box and the power supply 23 can be effectively cooled, and the energy consumption of the fan can be reduced, which is beneficial to saving energy.

[0037] Embodiment 2

[0038] See Figure 5 , the heat dissipation control method of the automotive heat pump air conditioner outdoor unit in this embodiment includes the following steps:

[0039] (1) The water pressure sensor 21 monitors the water pressure of the cooling water volume on the water receiving tray 4, where the cooling water volume includes the condensed water generated by the external radiator 3 and rainwater;

[0040] (2) When the water pressure value monitored by the water pressure sensor 21 is greater than or equal to the preset K value, it is determined that the cooling water volume in the water receiving tray 4 is sufficient and meets the heat dissipation requirements. The cooling water on the water receiving tray 4 is drained through the cooling water pipe to the second chamber 27 to dissipate heat from the control box and the power supply 23;

[0041] (3) When the water pressure value monitored by the water pressure sensor 21 is less than the preset K value, it is determined that the cooling water volume in the water receiving tray 4 is insufficient; at this time, the water pressure sensor 21 feeds back the air-cooled heat dissipation signal to the control box, and the control box issues an air-cooled signal, causing the control box fan 19 and the power supply fan 22 to operate to achieve air-cooled enhanced heat dissipation.

[0042] The heat dissipation control method for the outdoor unit of the automotive heat pump air conditioner in this embodiment enables the heat pump air conditioner to utilize the condensed water of the air conditioner and rainwater on rainy days to cool the controller, power supply, etc. used in the automotive heat pump air conditioner, having a good heat dissipation effect. The rainwater and condensed water do not require a water pump to be introduced for heat dissipation by gravity, and a water pressure sensor is connected to sense the water volume, thereby judging the water-cooling effect. When the water-cooling effect deteriorates, the fan can be connected for heat dissipation. When there is condensed water or rainwater, water-cooling heat dissipation can be fully utilized and the fan is turned off, effectively saving electricity, and this control method is also relatively simple.

[0043] The above is a preferred embodiment of the present invention, but the embodiments of the present invention are not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. An outdoor unit of an automotive heat pump air conditioner, characterized in that, it includes a frame and an outdoor unit assembly disposed on the frame; wherein, the frame includes a top plate, a water receiving tray, a chassis and side partitions, the top plate and the chassis are disposed opposite to each other, the water receiving tray is disposed between the top plate and the chassis, and the side partitions are vertically disposed on one side of the water receiving tray; a first cavity is formed between the water receiving tray and the top plate, a second cavity is formed between the water receiving tray and the chassis, and a third cavity is formed between the outer side of the side partition and the top plate and the chassis; an external fan is provided on the top plate, an external radiator is provided in the first cavity, and the outdoor unit assembly is disposed in the second cavity and the third cavity; a drainage joint is provided in the water receiving tray, and a cooling water pipe is further provided in the second cavity, one end of the cooling water pipe is connected to the drainage joint, and the other end of the cooling water pipe passes through the chassis and communicates with the outside; a control box fan is provided in the second cavity, and the control box fan is disposed below the control box of the outdoor unit assembly; a plurality of drainage joints are provided on the water receiving tray, and a plurality of cooling water pipes are provided in the second cavity; a water pressure sensor is provided on the water receiving tray, the water pressure sensor is used to detect the water pressure on the water receiving tray, and the water pressure sensor is electrically connected to the control box of the outdoor unit.

2. The outdoor unit of an automotive heat pump air conditioner according to claim 1, characterized in that, a power supply fan is further provided in the second cavity, and the power supply fan is disposed below the power supply of the outdoor unit assembly.

3. The outdoor unit of an automotive heat pump air conditioner according to claim 1, characterized in that, the outdoor unit assembly disposed in the second cavity includes a control box, a power supply and a compressor, the control box includes a slave control box and a master control box, and the master control box is disposed above the slave control box.

4. The outdoor unit of an automotive heat pump air conditioner according to claim 1, characterized in that, the outdoor unit assembly disposed in the third cavity includes a gas-liquid separator, a gas replenishing tank and a wiring board.

5. The outdoor unit of an automotive heat pump air conditioner according to claim 1, characterized in that, it further includes a housing, the housing includes a front panel, a rear panel and side panels, and the front panel, the rear panel and the side panels enclose the frame.

6. The outdoor unit of an automotive heat pump air conditioner according to claim 1, characterized in that, the external radiator is inclined and disposed in the first cavity.

7. A heat dissipation control method for an outdoor unit of an automotive heat pump air conditioner, characterized in that, based on the outdoor unit of an automotive heat pump air conditioner according to any one of claims 1-6, the control method includes the following steps: (1) The water pressure sensor monitors the water pressure of the cooling water volume on the water receiving tray, wherein the cooling water volume includes the condensed water and rainwater generated by the external radiator; (2) When the water pressure value monitored by the water pressure sensor is greater than or equal to the preset K value, it is determined that the cooling water volume in the water receiving tray is sufficient and meets the heat dissipation requirement, and the cooling water on the water receiving tray is drained through the cooling water pipe into the second cavity to dissipate heat from the control box and the power supply; (3) When the water pressure value monitored by the water pressure sensor is less than the preset K value, it is determined that the cooling water volume in the water receiving tray is insufficient; at this time, the water pressure sensor feeds back an air-cooled heat dissipation signal to the control box, and the control box issues an air-cooled signal, so that the control box fan and the power supply fan operate to achieve air-cooled enhanced heat dissipation.

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