Vehicle air conditioner with convenient liquid adding and degassing

Abstract

The utility model discloses a vehicle air conditioner of convenient liquid filling and gas removal, include: refrigerant transmission system, including installing the bottom plate of vehicle top, install compressor, condenser, dryer and heat exchanger through refrigerant pipeline connection on it, battery pack cooling system, including battery box, water pump, expansion water tank and bubble separator through cooling pipeline connection, expansion water tank with battery box install in the car bottom. The utility model has the advantages that the refrigeration of vehicle battery is realized, the expansion water tank is installed in the car bottom, has the automatic exhaust function, when filling liquid, does not need vacuum filling machine, fills conveniently, internally has bubble separator, and simple and convenient external pipeline builds, and can more effectively carry out the emptying of waterway system, improves energy exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vehicle air conditioning technology, specifically to a vehicle air conditioning system that is convenient for adding refrigerant and removing gas. Background Technology

[0002] The air conditioning units in new energy vehicles are powered by energy storage batteries. Since the optimal operating temperature for the battery pack is 25℃~35℃, and the power battery is one of the key components of a pure electric vehicle, temperature has a significant impact on its overall performance and lifespan. To extend the lifespan of the power battery, improve its chemical performance and energy efficiency, and extend the vehicle's driving range, a properly matched battery cooling management system is necessary. Existing semi-roof-mounted air conditioning technologies, such as the invention patent with authorization announcement number CN 217730155 U, disclose a semi-roof-mounted pure electric air conditioning unit with integrated battery water cooling. The expansion tank is installed on the top, and antifreeze is added through this top-mounted expansion tank. To avoid internal air bubbles, a vacuum filling machine is usually required, resulting in high filling costs. Furthermore, because the expansion tank is installed on the vehicle roof, multiple vent pipes are needed, making adding antifreeze difficult and time-consuming. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a vehicle air conditioner that is convenient for adding liquid and degassing. The expansion tank does not need to be installed on the top of the vehicle. The expansion tank is moved down for easy filling. It has an internal bubble separator, simplifies the construction of external pipelines, and can more effectively drain the water system, thereby improving energy exchange efficiency.

[0004] Specifically, this utility model discloses a vehicle air conditioner that facilitates refrigerant filling and degassing, comprising:

[0005] The refrigerant transfer system includes a floorboard mounted on the top of the vehicle, on which a compressor, condenser, dryer, and heat exchanger are connected and installed via refrigerant pipes;

[0006] The battery pack cooling system includes a battery box, a water pump, an expansion tank, and a bubble separator connected by cooling pipes, wherein the expansion tank and the battery box are mounted under the vehicle.

[0007] The advantages of adopting the above technical solution are that it enables the cooling of the vehicle battery, the expansion tank is installed under the vehicle, it has a built-in bubble separator and an automatic venting function, and a vacuum filling machine is not required when adding liquid.

[0008] Furthermore, the heat exchanger is connected to the cooling pipe, and the refrigerant transmission system exchanges heat with the battery pack cooling system through the heat exchanger.

[0009] The advantage of adopting the above technical solution is that by setting up a heat exchanger to achieve heat exchange, the temperature of the coolant in the cooling pipe is reduced, thereby cooling the battery box, ensuring that the battery temperature is within the normal range, and improving the vehicle's range.

[0010] Furthermore, the bubble separator is provided with an inlet and an outlet. The inlet is connected to the battery box via a cooling pipe, and the outlet is connected to the heat exchanger.

[0011] The advantages of adopting the above technical solution are that the bubble separator is used to remove air bubbles in the coolant, reduce water pump energy consumption, and improve the heat exchange efficiency inside the battery pack.

[0012] Furthermore, a water outlet temperature sensor is connected to the cooling pipe.

[0013] The advantage of adopting the above technical solution is that the outlet water temperature sensor is used to sense the outlet water temperature of the heat exchanger, monitor whether the heat exchanger is working properly, and keep the coolant within the set temperature range.

[0014] Furthermore, the refrigerant pipeline is equipped with a PTC liquid heater, which is installed on the base plate and has a drain outlet connected to the water pump. The inlet of the bubble separator is connected to a return water pipeline, which is connected to the battery box.

[0015] The advantage of adopting the above technical solution is that by setting up a PTC liquid heater to heat the coolant, it is suitable for situations where the battery box needs to be heated in cold weather.

[0016] Furthermore, a valve core is installed on the cooling pipe.

[0017] The advantages of adopting the above technical solution are that the valve core setting provides a maintenance channel. When no operation is required, the maintenance port is tightly sealed to prevent refrigerant leakage. When operation is required, it provides a fast, reliable, and sealed connection channel, allowing maintenance personnel to safely perform critical maintenance work such as pressure testing and vacuuming.

[0018] Furthermore, the refrigerant pipeline is also equipped with a sight glass, an electronic expansion valve, and a gas-liquid separator.

[0019] Furthermore, the refrigerant pipeline is equipped with a low-pressure sensor, a high-pressure sensor, and a pressure relief valve.

[0020] The advantage of adopting the above technical solution is that it enables pressure detection of refrigerant pipelines, and when the pressure is too high, the pressure relief valve releases pressure to ensure the requirements of use are met.

[0021] Furthermore, the expansion tank is equipped with a water inlet.

[0022] The advantage of adopting the above technical solution is that the water inlet is used to replenish the refrigerant, thus realizing the charging function. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a diagram showing the overall piping connection of a vehicle air conditioning system that facilitates refrigerant filling and degassing, as per this utility model.

[0025] Figure 2 This is an isometric drawing of the overall structure of a vehicle air conditioner that facilitates refrigerant filling and degassing, according to this utility model.

[0026] Figure 3 This is a structural diagram of a vehicle air conditioner with a completely removed cover panel for convenient refrigerant filling and degassing.

[0027] Figure 4 This is a structural diagram of the bubble separator of this utility model.

[0028] The reference numerals used in the attached figures are as follows:

[0029] Base plate 1; Refrigerant pipe 11; PTC liquid heater 13; Outlet 131; Return water pipe 132; Sight glass 14; Electronic expansion valve 15; Gas-liquid separator 16; Low pressure sensor 17; High pressure sensor 18; Pressure relief valve 19; Compressor 2; Condenser 3; Condenser fan 31; Cover plate 32; Valve core seat 33; Return gas temperature sensor 34; Condensation temperature sensor 35; Dryer 4; Heat exchanger 5; Battery box 6; Cooling pipe 61; Outlet water temperature sensor 62; Valve core 63; Water pump 7; Expansion tank 8; Bubble separator 9; Inlet 91; Outlet 92. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] like Figure 1-4 As shown, this utility model discloses a vehicle air conditioner that is convenient for adding liquid and degassing, comprising:

[0032] The refrigerant transfer system includes a base plate 1 installed on the top of the vehicle, on which a compressor 2, a condenser 3, a dryer 4 and a heat exchanger 5 are connected and installed via refrigerant pipes 11. A condenser fan 31 is installed on the upper side of the condenser 3. A cover plate 32 is installed on the base plate 1. The condenser 3 is located on the lower side of the cover plate 32. The condenser fan 31 is installed on the cover plate 32 and plays a role in heat dissipation.

[0033] The battery pack cooling system includes a battery box 6, a water pump 7, an expansion tank 8, and a bubble separator 9 connected by a cooling pipe 61. The expansion tank 8 and the battery box 6 are installed under the vehicle.

[0034] The advantage of adopting the above technical solution is that it enables the cooling of the vehicle battery. The expansion tank 8 is installed under the vehicle and has an automatic venting function. No vacuum filling machine is required when adding liquid.

[0035] The heat exchanger 5 is connected to the cooling pipe 61. The refrigerant transmission system and the battery pack cooling system exchange heat through the heat exchanger 5. The heat exchanger 5 is a plate heat exchanger with high heat exchange efficiency. The plate heat exchanger has pipes for refrigerant and pipes for coolant, and heat exchange takes place inside the heat exchanger 5.

[0036] The advantage of adopting the above technical solution is that by setting up a heat exchanger 5 to achieve heat exchange, the temperature of the coolant in the cooling pipe 61 is reduced, thereby cooling the battery box 6, ensuring that the battery temperature is within the normal range, and improving the vehicle's range.

[0037] Furthermore, the bubble separator 9 is provided with an inlet 91 and an outlet 92. The inlet 91 is connected to the battery box 6 through a cooling pipe 61, and the outlet 92 is connected to the heat exchanger 5. The bubble separator 9 has a chamber inside for separating gas. The separated gas is discharged through the exhaust port. Its working principle and specific structure are existing technologies and will not be described here. The bubble separator 9 is used to remove bubbles in the coolant, reduce the energy consumption of the water pump 7, increase the heat exchange efficiency inside the battery box, and eliminate the need for a vacuum filling machine when adding coolant.

[0038] Furthermore, a water outlet temperature sensor 62 is connected to the cooling pipe 61. The water outlet temperature sensor 62 is installed at the outlet position of the heat exchanger 5 and is used to detect the temperature of the coolant in the cooling pipe 61 after heat exchange, so as to ensure that the coolant can better cool the battery box 6 and keep the battery within a suitable operating range.

[0039] Furthermore, a PTC liquid heater 13 is installed on the refrigerant pipe 11, mounted on the base plate 1. A drain outlet 131 extends from the bottom of the base plate 1 and connects to the water pump 7. The inlet of the PTC liquid heater is connected to the heat exchanger. The inlet 91 of the bubble separator 9 is connected to a return water pipe 132, which is connected to the battery box 6. The PTC liquid heater 13 heats the coolant, suitable for situations where the battery box 6 requires heating in cold weather.

[0040] Furthermore, a valve core 63 is installed on the cooling pipe 61 of the heat exchanger 5. The heat exchanger 5, the outlet water temperature sensor 62, the valve core 63, the expansion tank 8, the water pump 7, the battery box 6, the bubble separator 9 and the valve core 63 are installed sequentially on the cooling pipe 61. The gas is separated by the bubble separator 9.

[0041] The valve core 63 is designed to provide a maintenance access point. When not in use, it tightly seals the access port to prevent refrigerant leakage. When needed, it provides a quick, reliable, and sealed connection, allowing maintenance personnel to safely perform critical maintenance tasks such as pressure testing, refrigerant charging / recovery, and vacuuming.

[0042] In some implementation schemes, the refrigerant pipe 11 is also equipped with a sight glass 14, an electronic expansion valve 15, and a gas-liquid separator 16.

[0043] Furthermore, a low-pressure sensor 17, a high-pressure sensor 18, and a pressure relief valve 19 are installed on the refrigerant pipe 11.

[0044] The refrigerant pipe 11 is sequentially equipped with a condenser 3, a valve core seat 33, a high-pressure sensor 18, a pressure relief valve 19, a compressor 2, a gas-liquid separator 16, a valve core seat 33, a return gas temperature sensor 34, a low-pressure sensor 17, an electronic expansion valve 15, a sight glass 14, and a condensation temperature sensor 35, to realize the refrigerant transmission and the cooling function in the vehicle. At the same time, the refrigerant pipe 11 has branch pipes, which are equipped with a return gas temperature sensor, a heat exchanger 5, and an electronic expansion valve 15, to exchange heat with the cooling pipe 61 and realize the battery box cooling function.

[0045] The advantage of adopting the above technical solution is that it enables pressure detection of the refrigerant pipeline 11, and when the pressure is too high, the pressure relief valve 19 releases pressure to ensure the requirements of use are met.

[0046] Furthermore, the expansion tank 8 is equipped with a water inlet, through which coolant is added to the expansion tank 8. Since this application is equipped with an air bubble separator 9, the internal air can be automatically discharged after filling, without the need for filling with a vacuum filling machine.

[0047] During use, the expansion tank 8 is lowered, making it more convenient for customers to replenish the liquid; the internal bubble separator 9 simplifies the construction of external pipelines and enables more effective drainage of the water system, increasing energy exchange efficiency.

[0048] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A vehicle air conditioner that is convenient for adding liquid and removing gas, characterized in that, include: The refrigerant transfer system includes a floor (1) mounted on the top of the vehicle, on which a compressor (2), a condenser (3), a dryer (4) and a heat exchanger (5) are connected and installed via refrigerant pipes (11). The battery pack cooling system includes a battery box (6), a water pump (7), an expansion tank (8), and a bubble separator (9) connected by a cooling pipe (61), the expansion tank (8) being mounted on the underside of the vehicle along with the battery box (6).

2. The vehicle air conditioner with convenient refrigerant addition and degassing according to claim 1, characterized in that, The heat exchanger (5) is connected to the cooling pipe (61), and the refrigerant transmission system exchanges heat with the battery pack cooling system through the heat exchanger (5).

3. The vehicle air conditioner with convenient refrigerant addition and degassing according to claim 1, characterized in that, The bubble separator (9) is provided with an inlet (91) and an outlet (92). The inlet (91) is connected to the battery box (6) through a cooling pipe (61), and the outlet (92) is connected to the heat exchanger (5).

4. The vehicle air conditioner with convenient refrigerant addition and degassing according to claim 1, characterized in that, A water outlet temperature sensor (62) is connected to the cooling pipe (61).

5. The vehicle air conditioner with convenient refrigerant addition and degassing according to claim 3, characterized in that, The refrigerant pipe (11) is equipped with a PTC liquid heater (13), which is installed on the base plate (1) and has a drain outlet (131) connected to the water pump (7). The inlet (91) of the bubble separator (9) is connected to a return water pipe (132), which is connected to the battery box (6).

6. The vehicle air conditioner with convenient refrigerant addition and degassing according to claim 1, characterized in that, A valve core (63) is installed on the cooling pipe (61).

7. The vehicle air conditioner with convenient refrigerant addition and degassing according to claim 1, characterized in that, The refrigerant pipe (11) is also equipped with a sight glass (14), an electronic expansion valve (15), and a gas-liquid separator (16).

8. The vehicle air conditioner with convenient refrigerant addition and degassing according to claim 7, characterized in that, The refrigerant pipe (11) is equipped with a low-pressure sensor (17), a high-pressure sensor (18), and a pressure relief valve (19).

9. The vehicle air conditioner with convenient refrigerant addition and degassing according to claim 1, characterized in that, The expansion tank (8) is equipped with a water inlet.

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