Tandem type automobile heat pump air conditioning system and electric automobile

Abstract

The utility model relates to a tandem type automobile heat pump air conditioning system and an electric automobile. The tandem type automobile heat pump air conditioning system comprises a heat pump module, wherein the heat pump module comprises a compressor, an external heat exchanger, a four-way valve, a throttling device and a heat exchanger; the heat exchanger is provided with a first heat exchange flow channel and a second heat exchange flow channel which exchange heat with each other, the compressor, the external heat exchanger and the first heat exchange flow channel are respectively connected with the four-way valve, and the throttling device is connected between the external heat exchanger and the first heat exchange flow channel; and the liquid circulation module comprises a water pump, an in-vehicle heat exchange module and an equipment heat exchange module, and the water pump, the in-vehicle heat exchange module, the equipment heat exchange module and the second heat exchange runner are connected in series. Energy consumption of an automobile is reduced, and the service life of an air conditioner and automobile electrical equipment is prolonged.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to a series automotive heat pump air conditioning system and an electric vehicle. Background Technology

[0002] Cars are a common means of transportation for people's daily travel and are widely used in people's daily lives. Cars are usually equipped with air conditioning systems to meet users' cooling or heating requirements in different environments.

[0003] With the continuous development of electric vehicle technology, electric vehicles are gradually becoming more widely used. However, compared to gasoline vehicles, electric vehicles cannot utilize the heat generated by the engine to meet the heating requirements of the air conditioning system in winter. Therefore, electric vehicles use a heat pump air conditioning system that switches between heating and cooling via a four-way valve. For example, Chinese Patent Publication No. CN 113306451 A discloses a battery pack temperature control device, an electric vehicle, and its control method, which is equipped with a battery radiator arranged in parallel with the vehicle's heat exchanger. When the battery radiator needs to dissipate heat, a circulation pump starts, causing the liquid in the battery radiator to circulate into an auxiliary heat exchanger to exchange heat with the refrigerant driven by the compressor. This allows the low-temperature refrigerant generated by the compressor to absorb the heat from the liquid flowing through the battery radiator.

[0004] However, in actual use, especially in winter, the vehicle interior requires heating. After an electric vehicle has been running for a period of time, the battery pack and electrical equipment remain operational and continuously generate heat, necessitating the activation of the air conditioning system for cooling. At this point, the heating system needs to be switched off to cool the battery pack, which degrades the user experience and causes the air conditioning to run for extended periods, consuming a significant amount of battery power and reducing driving range and battery life. Therefore, designing a technology that reduces power consumption and improves the user experience is the technical problem this invention aims to solve. Summary of the Invention

[0005] The purpose of this invention is to provide a series-connected automotive heat pump air conditioning system and an electric vehicle, which realizes the connection of an in-vehicle heat exchange module and an equipment heat exchange module in series. The liquid output from the in-vehicle heat exchange module is used to supply the equipment heat exchange module to absorb heat and reduce the heat of electrical heating devices such as battery packs, thereby reducing the energy consumption of the vehicle and improving the lifespan of the air conditioner and the vehicle.

[0006] To achieve the above effects, this application adopts the following technical solution: a series-connected automotive heat pump air conditioning system, comprising:

[0007] A heat pump module, comprising a compressor, an external heat exchanger, a four-way valve, a throttling device, and a heat exchanger; the heat exchanger has a first heat exchange channel and a second heat exchange channel for mutual heat exchange; the compressor, the external heat exchanger, and the first heat exchange channel are respectively connected to the four-way valve; and the throttling device is connected between the external heat exchanger and the first heat exchange channel.

[0008] The liquid circulation module includes a water pump, an in-vehicle heat exchange module, and an equipment heat exchange module, wherein the water pump, the in-vehicle heat exchange module, the equipment heat exchange module, and the second heat exchange channel are connected in series.

[0009] Furthermore, the liquid circulation module also includes a three-way valve configured to control the in-vehicle heat exchange module to selectively connect the second heat exchange channel and / or the equipment heat exchange module.

[0010] Furthermore, the water pump, the in-vehicle heat exchange module, the three-way valve, the equipment heat exchange module, and the second heat exchange channel are connected in series to form a first liquid circulation path.

[0011] Furthermore, the water pump, the in-vehicle heat exchange module, the three-way valve, and the second heat exchange channel are connected in series to form a second liquid circulation path.

[0012] Furthermore, the inlet of the three-way valve is connected to the outlet of the in-vehicle heat exchange module, one outlet of the three-way valve is connected to the second heat exchange channel, the other outlet of the three-way valve is connected to the inlet of the equipment heat exchange module, and the outlet of the equipment heat exchange module is connected to the second heat exchange channel.

[0013] Furthermore, the liquid flowing out from the second heat exchange channel, driven by the water pump, flows through the in-vehicle heat exchange module and the equipment heat exchange module and flows back into the second heat exchange channel.

[0014] Furthermore, the liquid flowing out from the second heat exchange channel, driven by the water pump, enters the vehicle interior heat exchange module and bypasses the equipment heat exchange module, flowing directly back into the second heat exchange channel.

[0015] Furthermore, the liquid flowing out from the second heat exchange channel enters the in-vehicle heat exchange module under the driving action of the water pump. A portion of the liquid output from the in-vehicle heat exchange module flows directly back into the second heat exchange channel, while the remaining liquid output from the in-vehicle heat exchange module first enters the equipment heat exchange module and then flows back into the second heat exchange channel.

[0016] This utility model also provides an electric vehicle, including the above-mentioned series-connected automotive heat pump air conditioning system.

[0017] The beneficial effects of this application are as follows: By configuring an in-vehicle heat exchange module and an equipment heat exchange module connected in series in the liquid circulation module, when using it in the spring and autumn transition seasons, when liquid needs to flow into the equipment heat exchange module to cool the electrical heating devices such as the battery pack in the car, the liquid flowing out of the in-vehicle heat exchange module can be transported to the equipment heat exchange module. Then, the liquid flowing out of the in-vehicle heat exchange module enters the equipment heat exchange module to absorb heat. After absorbing the heat from the heating devices, the liquid re-enters the in-vehicle heat exchange module, and then dissipates the heat brought back to the outside of the car through external circulation. Thus, there is no need to separately start the air conditioning system to cool the electrical heating devices such as the battery pack, which can reduce the running time of the air conditioning system, reduce the energy consumption of the car, and improve the life of the air conditioning and the car.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is one of the schematic diagrams of the series-connected automotive heat pump air conditioning system of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of a series-connected automotive heat pump air conditioning system in cooling mode;

[0021] Figure 3 for Figure 1 A schematic diagram of a series-connected automotive heat pump air conditioning system in heating mode;

[0022] Figure 4 for Figure 1 A schematic diagram of a series-connected automotive heat pump air conditioning system in normal temperature mode.

[0023] Figure label:

[0024] 101. External heat exchanger; 102. External fan; 103. Four-way valve; 104. Compressor; 105. Throttling valve; 109. Gas-liquid separator; 111. Heat exchanger; 201. Water pump; 202. Internal heat exchange module; 203. Equipment heat exchange module; 204. Three-way valve; 301. Internal air supply assembly; 302. Internal fan; 303. Air inlet valve; 304. Air outlet valve; A. External air inlet; B. Internal air inlet; C. External air outlet; D. Internal air outlet. Detailed Implementation

[0025] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. The application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] In this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.

[0028] Example 1, please refer to Figures 1-4 As shown in the preferred embodiment of this application, the series-connected automotive heat pump air conditioning system is suitable for installation on a vehicle body, such as an off-road vehicle or a car, and is particularly suitable for installation in new energy electric vehicles. In other embodiments, the series-connected automotive heat pump air conditioning system can also be applied to other places, and the specific application scenarios of this air conditioning system are not specifically limited here.

[0029] The series-connected automotive heat pump air conditioning system includes a heat pump module 100, a gas circulation module 200, and a liquid circulation module 300.

[0030] In this embodiment, the heat pump module 100 uses tetrafluoroethane as the first medium, while the liquid circulation module 300 uses antifreeze as the second medium. In other embodiments, the first and second media can also be other media.

[0031] For the heat pump module, the heat pump module includes a compressor 104, an external heat exchanger 101, a four-way valve 103, a throttling device, and a heat exchanger 111. The heat exchanger 111 has a first heat exchange channel and a second heat exchange channel for mutual heat exchange. The compressor 104, the external heat exchanger 101, and the first heat exchange channel are respectively connected to the four-way valve 103. The throttling device is connected between the external heat exchanger 101 and the first heat exchange channel. A gas-liquid separator 109 is also provided between the compressor 104 and the four-way valve 103.

[0032] For the gas circulation module, the gas circulation module includes an in-vehicle air supply assembly 301 and an in-vehicle fan. The interior of the in-vehicle air supply assembly 301 forms an air duct. The in-vehicle air supply assembly 301 is also provided with an on / off external air inlet A, an in-vehicle air inlet B, an external air inlet C, and an in-vehicle air outlet D. The external air inlet A, the internal air inlet B, the external air inlet C, and the in-vehicle air outlet D are respectively connected to the air duct. The in-vehicle fan is installed in the air duct.

[0033] For the liquid circulation module, the liquid circulation module includes a water pump 201, an in-vehicle heat exchange module 202, and an equipment heat exchange module 203. The water pump 201, the in-vehicle heat exchange module 202, the equipment heat exchange module 203, and the second heat exchange channel are connected in series. The in-vehicle heat exchange module is disposed in the air duct.

[0034] Specifically, under the action of the compressor 104, the heat pump module drives the first medium to flow into the external heat exchanger 101 and the first heat exchange channel, and switches the direction through the four-way valve 103 to achieve the switching between cooling mode and heating mode.

[0035] The liquid circulation module uses a water pump 201 to transport the second medium flowing out of the second heat exchange channel to the vehicle interior heat exchange module 202 and the equipment heat exchange module 203, in order to meet the temperature regulation requirements of the vehicle interior and the temperature control requirements of electrical equipment such as battery packs and electrical devices in electric vehicles.

[0036] The water pump 201, the in-vehicle heat exchange module 202, the equipment heat exchange module 203, and the second heat exchange channel are connected in series. There is no restriction on the specific series order. The positions of the water pump 201, the in-vehicle heat exchange module 202, the equipment heat exchange module 203, and the second heat exchange channel can be arbitrarily changed as needed.

[0037] The in-vehicle air supply assembly 301 in the gas circulation module is equipped with an in-vehicle heat exchange module 202. The in-vehicle heat exchange module 202 can perform heat exchange treatment on the airflow entering the air duct of the in-vehicle air supply assembly 301. The heat-exchanged air can be output through the out-of-vehicle air outlet C or the in-vehicle air outlet D to meet different usage requirements.

[0038] In actual use, when users have cooling or heating needs, the in-vehicle heat exchange module 202 can be used to cool or heat the air inside the vehicle. At the same time, if it is necessary to cool down the battery pack or electrical equipment, the second medium output from the in-vehicle heat exchange module flows into the equipment heat exchange module 203 to exchange heat and control the temperature of the battery pack and electrical equipment.

[0039] Especially when the user does not need to use the heat pump module for cooling or heating, the battery pack and electrical equipment in an electric vehicle will continuously generate heat during operation, requiring forced cooling. In this case, since the heat pump module is not needed to regulate the temperature inside the vehicle, the interior air inlet B and outlet D are closed, while the exterior air inlet A and outlet C are opened. The interior fan is then activated, allowing outside air to circulate into the air duct and exchange heat with the interior heat exchange module 202 to lower the temperature of the second medium. The second medium output from the interior heat exchange module 202 then flows into the equipment heat exchange module 203 to absorb the heat generated by the battery pack and electrical equipment, thereby achieving forced cooling of the battery pack and electrical equipment.

[0040] Furthermore, the water pump 201, the in-vehicle heat exchange module 202, the equipment heat exchange module 203, and the second heat exchange channel are connected in series to form a first liquid circulation path;

[0041] The water pump 201, the in-vehicle heat exchange module 202, and the second heat exchange channel are connected in series to form a second liquid circulation path.

[0042] Specifically, when the first liquid circulation path is formed, the equipment heat exchange module 203 will use the second medium flowing out from the vehicle heat exchange module 202 to enter the equipment heat exchange module 203 to regulate the temperature of electrical equipment such as battery packs and electrical equipment.

[0043] When electrical equipment such as battery packs and electrical devices does not require heat exchange, the second medium flowing out of the vehicle heat exchange module 202 directly enters the second heat exchange channel to form a second liquid circulation path, which only achieves the regulation of the vehicle interior temperature.

[0044] In order to meet the requirement that the in-vehicle heat exchange module 202 selectively connects to the equipment heat exchange module 203 and the second heat exchange channel, the in-vehicle heat exchange module 202, the equipment heat exchange module 203 and the second heat exchange channel are connected together by a three-way valve 204. The three-way valve 204 is configured to control the in-vehicle heat exchange module 202 to selectively connect to the second heat exchange channel and / or the equipment heat exchange module 203.

[0045] Specifically, the outlet of the in-vehicle heat exchange module 202 is connected to the inlet of the second heat exchange channel and the inlet of the equipment heat exchange module 203 respectively through the three-way valve 204. The three-way valve 204 can selectively connect the outlet of the in-vehicle heat exchange module 202 to the inlet of the second heat exchange channel and / or the inlet of the equipment heat exchange module 203 according to the usage requirements.

[0046] Furthermore, the external air inlet A, the internal air inlet B, the external air inlet C, and the internal air outlet D are each equipped with an independent damper (not shown).

[0047] Specifically, by configuring an independent damper on each air outlet, the opening and closing of each air outlet can be controlled independently through the damper.

[0048] Alternatively, the in-vehicle air supply assembly 301 is provided with an air inlet valve 303 and an air outlet valve 304. The air inlet valve 303 is configured to selectively open the external air inlet A and the internal air inlet B, and the air outlet valve 304 is configured to selectively open the external air outlet C and the internal air outlet D.

[0049] Specifically, the air inlet valve 303 can switch between opening the external air inlet A and the internal air inlet B, and similarly, the air outlet valve 304 can switch between opening the external air outlet C and the internal air outlet D. This satisfies the airflow requirements within the air duct of the internal air supply assembly 301 during electric vehicle operation, depending on the air conditioning system's operating mode.

[0050] In actual use, a series-connected automotive heat pump air conditioning system can execute the following control modes: cooling mode, heating mode, and normal temperature mode.

[0051] Specifically, when an electric vehicle is used in different seasons throughout the year, the compressor 104 in the series-connected automotive heat pump air conditioning system is activated to regulate the temperature inside the vehicle based on the ambient temperature. Meanwhile, when the ambient temperature is suitable, the compressor 104 does not need to be activated to regulate the interior temperature. However, there are situations where electrical equipment such as the battery pack and electrical devices require temperature regulation. Therefore, specific control methods are implemented in different modes as follows.

[0052] When the ambient temperature is high, causing the interior temperature of the vehicle to be high and requiring a reduction in interior temperature, the series-connected automotive heat pump air conditioning system operates in cooling mode. Specifically, the compressor 104 and the in-vehicle fan are started, the in-vehicle air inlet B and the in-vehicle air outlet D of the in-vehicle air supply assembly 301 are opened, and the out-of-vehicle air outlet C and the out-of-vehicle air inlet A are closed, or when fresh air from outside is needed, the in-vehicle air inlet and the out-of-vehicle air inlet are opened simultaneously; the liquid output from the second heat exchange channel of the heat exchanger 111 first enters the in-vehicle heat exchange module 202 under the action of the water pump 201, the liquid is heated by heat exchange in the in-vehicle heat exchange module 202 and flows into the equipment heat exchange module 203 to absorb heat, and finally the liquid flows back to the second heat exchange channel.

[0053] like Figure 2As shown, the four-way valve 103 in the heat pump module 100 switches the flow path so that the low-temperature first medium flows into the first heat exchange channel of the heat exchanger 111. The compressor 104 discharges high-temperature and high-pressure gas, which enters the external heat exchanger 101 through the four-way valve 103. After cooling, it becomes a medium-temperature and high-pressure liquid, which enters the heat exchanger 111 after passing through the throttle valve 105. After evaporation in the heat exchanger 111, it becomes a low-temperature and low-pressure gas, which then enters the compressor suction port through the gas-liquid separator 109, thus realizing the refrigerant circulation.

[0054] The second medium flowing in the second heat exchange channel exchanges heat with the first medium in the first heat exchange channel to form a low-temperature second medium.

[0055] The low-temperature secondary medium flows through the vehicle heat exchange module 202 under the action of the water pump 201. After being heated by the vehicle heat exchange module 202, it becomes a medium-temperature liquid. Then, it enters the equipment heat exchange module 203 through the three-way valve 204. After the medium-temperature liquid absorbs heat from the equipment heat exchange module 203 to cool down the battery pack and other electrical equipment, it becomes a slightly warmer liquid. After being cooled by the heat exchanger 111, it enters the vehicle heat exchange module 202 through the water pump 201, thus realizing liquid circulation.

[0056] After the cryogenic liquid enters the vehicle interior heat exchange module 202, the vehicle interior air outlet D of the heat exchange module 202 opens, and the vehicle interior air return vent opens, achieving vehicle interior cooling. At this time, if a passenger activates the external air circulation mode, the air inlet valve opens to a certain position in the middle, achieving external air circulation.

[0057] In actual use, if the heat dissipation through the heat exchange module 203 is too large, the temperature of the battery pack and electrical equipment will remain below the set heat dissipation temperature for the first set time t1. In this case, the temperature of the battery pack and electrical equipment is too low. The three-way valve 204 can be opened to the middle position, allowing a portion of the second medium to directly enter the equipment radiator, while the other portion bypasses back to the heat exchanger 111 through the three-way valve 204. Alternatively, the liquid flow can be completely shut off to reduce the heat carried away from the heating equipment and maintain the heating equipment within a reasonable temperature range.

[0058] It should be noted that the optimal temperature of the battery is 25℃-50℃. During cooling, the temperature of the second medium may be relatively low, such as 10℃, which may cause the battery temperature to drop too low. In this case, a portion of the second medium is bypassed to prevent the battery temperature from dropping too low. That is, the inlet 1 of the three-way valve 204 is connected to the outlet 2 and outlet 3 respectively.

[0059] In cooling mode, when the temperature of the heating device in the car is lower than the first set temperature value, the liquid is cooled down by the in-vehicle heat exchange module 202 and then flows directly back to the second heat exchange channel.

[0060] When the air conditioner needs to be turned on but the heating equipment does not need to be cooled, the inlet 1 and outlet 3 of the three-way valve 204 are connected, and the inlet 1 and outlet 2 are closed.

[0061] To prevent the temperature of the second medium from becoming too low during refrigeration, which could lead to excessively low temperatures in the heat exchange module 203, a three-way valve 204 can be used to reduce the liquid flow rate into the heat exchange module 203, thereby ensuring that the electrical equipment remains within a reasonable temperature range. When the air conditioning is not needed in the vehicle, the interior fan can be turned off directly. When the electrical equipment does not require cooling, inlet 1 and outlet 3 of the three-way valve 204 are open, while inlet 1 and outlet 2 are closed to prevent low-temperature liquid from entering the heat exchange module 203.

[0062] When the ambient temperature is low, causing the interior temperature to be low and requiring an increase, the series-connected automotive heat pump air conditioning system operates in heating mode. Specifically, the compressor 104 and the in-vehicle fan are started, the in-vehicle air inlet B and in-vehicle air outlet D of the in-vehicle air supply assembly 301 are opened, and the out-of-vehicle air outlet C and out-of-vehicle air inlet A are closed. Or, when fresh air from outside is needed, the in-vehicle air inlet and the out-of-vehicle air inlet are opened simultaneously. The liquid output from the second heat exchange channel of the heat exchanger 111 first enters the in-vehicle heat exchange module 202 under the action of the water pump 201. The liquid is cooled down by heat exchange in the in-vehicle heat exchange module 202 and flows into the equipment heat exchange module 203 to absorb heat. Finally, the liquid flows back to the second heat exchange channel.

[0063] like Figure 3 As shown, the first medium is discharged after being processed by the compressor 104 to form a high-temperature and high-pressure gas. It enters the vehicle heat exchanger 111 through the four-way valve 103, and after cooling, it becomes a medium-temperature and high-pressure liquid. After passing through the throttle valve 105, it enters the vehicle external heat exchanger 101. After evaporating in the vehicle external heat exchanger 101, it becomes a low-temperature and low-pressure gas. Then, it enters the compressor suction port through the gas-liquid separator 109, thus realizing the circulation of the first medium.

[0064] After passing through heat exchanger 111, the first medium heats the second medium flowing through heat exchanger 111 into a high-temperature liquid. Under the action of water pump 201, the high-temperature liquid flows through vehicle heat exchange module 202, is cooled by vehicle heat exchange module 202 and becomes a medium-temperature liquid. Then it enters equipment heat exchange module 203 through three-way valve 204. After the medium-temperature liquid absorbs heat to cool the equipment through equipment heat exchange module 203, it becomes a slightly higher temperature liquid. After being heated by heat exchanger 111, it enters vehicle heat exchange module 202 through water pump 201, realizing liquid circulation.

[0065] For example, the second medium coming out of heat exchanger 111 has a temperature of 40°C. After being cooled to 30°C by the in-vehicle heat exchange module, it enters the equipment heat exchange module again, reducing the battery temperature from 40°C to 36°C (maintaining it within a reasonable range of 25-50°C). At the same time, the second medium is heated to 34°C, which is equivalent to recovering and utilizing the battery's waste heat. At this point, the compressor only needs to heat the 34°C second medium to 40°C to maintain a comfortable temperature inside the vehicle. If the second medium does not absorb the battery's waste heat, the compressor will have to heat the 30°C second medium to 40°C, increasing the compressor's power consumption.

[0066] After the high-temperature liquid enters the vehicle interior heat exchange module 202, the vehicle interior air outlet D of the heat exchange module 202 opens, and the vehicle interior air return vent opens, thus achieving vehicle interior heating. If a passenger activates the external air circulation mode, the air inlet valve opens to a certain position in the middle, achieving external air circulation.

[0067] In actual use, when the heating mode is executed, if the liquid temperature output from the in-vehicle heat exchange module 202 is higher than the second set temperature value, the compressor frequency is reduced or the compressor 104 is turned off and the in-vehicle fan is kept running. Under the action of the water pump 201, the liquid circulates between the in-vehicle heat exchange module 202 and the equipment heat exchange module 203. In addition, the in-vehicle air inlet B and the in-vehicle air outlet D of the in-vehicle air supply assembly 301 are opened, and the out-of-vehicle air outlet C and the out-of-vehicle air inlet A are closed. Or, when fresh air from outside is needed, the in-vehicle air inlet and the out-of-vehicle air inlet are opened at the same time.

[0068] Specifically, if the liquid temperature flowing out of the in-vehicle heat exchange module 202 is too high to cool the heat-generating equipment to a suitable temperature, the compressor frequency can be reduced or the compressor 104 can be turned off to allow the second medium to circulate between the in-vehicle heat exchange module 202 and the equipment heat exchange module 203. Simultaneously, the outside air intake A can be opened to utilize outside air to lower the liquid temperature flowing out of the in-vehicle heat exchange module 202. In this case, the speed of the in-vehicle fan needs to be increased to quickly lower the temperature of the second medium.

[0069] Alternatively, the compressor 104 can be used to reduce the frequency, thereby lowering the temperature of the second medium output from the second heat exchange channel to a suitable temperature. At the same time, the in-vehicle fan can increase the air volume and lower the liquid temperature to cool down the heat-generating electrical equipment.

[0070] If the temperature of the electrical equipment is too low when starting the car in winter, a second heating medium can be used to heat the battery pack through the equipment heat exchange module 203 to ensure that the battery pack is within a suitable temperature range.

[0071] In winter, when temperatures are low, if the battery pack temperature is too low, the system heats the electrical equipment to a reasonable temperature range while simultaneously heating the vehicle interior. If the electrical equipment temperature is too high, the heat from the electrical equipment is directly recovered to heat the secondary medium to meet the vehicle interior temperature requirements. This shortens the operating time of the compressor 104 and cools the electrical equipment, releasing the heat back into the vehicle through the in-vehicle heat exchange module 202, thus achieving heat recovery, reducing air conditioning power consumption, and increasing driving range.

[0072] In normal temperature mode, compressor 104 is not started, the in-vehicle fan is started, the in-vehicle air inlet B and in-vehicle air outlet D of the in-vehicle air supply assembly 301 are closed, and the out-of-vehicle air outlet C and out-of-vehicle air inlet A are opened; under the action of water pump 201, the liquid circulates between the in-vehicle heat exchange module 202 and the equipment heat exchange module 203.

[0073] like Figure 4 As shown, during transitional seasons, such as when the outside temperature is 20°C, there is no need to turn on the air conditioning inside the vehicle. At this time, the electrical equipment inside the vehicle will still generate heat. This invention can achieve cooling of the electrical equipment without turning on the air conditioning module.

[0074] The inlet 1 and outlet 2 of the three-way valve 204 are open. The air inlet valve closes the air inlet B inside the vehicle and opens the air inlet A outside the vehicle. The air outlet valve closes the air outlet D inside the vehicle and opens the air outlet C outside the vehicle. The fan inside the vehicle starts. After the water pump 201 is turned on, the liquid passes through the equipment heat exchange module 203 to cool the electrical equipment. At the same time, it carries the heat generated by the electrical equipment to the heat exchange module 202 inside the vehicle. The 20°C air outside the vehicle passes through the heat exchange module 202 inside the vehicle and carries the heat generated by the electrical equipment outside the vehicle. After the liquid is cooled, it re-enters the equipment heat exchange module 203 to cool the electrical equipment.

[0075] It enables the cooling of electrical equipment without activating the heat pump module, thereby reducing air conditioning energy consumption, increasing driving range, and extending the life of the air conditioner.

[0076] Furthermore, in winter conditions, when the outside temperature is low, the external heat exchanger 101 needs to be defrosted. The control method for a series-connected automotive heat pump air conditioning system also includes a defrost mode.

[0077] Specifically, in defrosting mode, neither the external fan 102 nor the internal fan is activated. The compressor 104 discharges high-temperature, high-pressure gas, which enters the external heat exchanger 101 through the four-way valve 103. At the same time, the heat generated by the electrical equipment absorbed by the heat exchange module 203 circulates into the heat exchanger 111, allowing the heat pump module to obtain more heat and accelerate the defrosting process.

[0078] During defrosting, the heat from the electrical heating equipment is recovered into the second medium and utilized by the heat pump module through heat exchanger 111, accelerating the defrosting process and preventing the liquid circulation system temperature from dropping too low. Additionally, the liquid temperature remains high during defrosting, preventing frost from forming on the in-vehicle heat exchange module 202. Furthermore, after defrosting, the system switches to heating, resulting in a slow liquid temperature rise and preventing fog formation after defogging.

[0079] While achieving in-vehicle heating and cooling functions, as well as battery pack heating or cooling functions, the system also features: Specifically, during winter heating, waste heat from the battery pack can be recovered; additionally, during seasons when the air conditioning is not used, the heat pump module 100 can be used to cool the battery pack and related heat-generating equipment without needing to operate. During defrosting, waste heat from the battery pack is used for defrosting, accelerating the defrosting time. Furthermore, after defrosting, the in-vehicle heat exchange module 202 will not fog up, ensuring vehicle driving safety.

[0080] The beneficial effects of this application are as follows: by setting up a heat pump module, a gas circulation module, and a liquid circulation module, the in-vehicle air supply assembly 301 is also additionally equipped with an out-of-vehicle air vent C to meet the requirement that the air flowing through the air duct is output to the outside of the vehicle, thereby avoiding the impact on the temperature inside the vehicle. In actual use, when the temperature inside the vehicle does not need to be adjusted, the water pump 201 is started to make the liquid circulate between the in-vehicle heat exchange module 202 and the equipment heat exchange module 203, and the outside air enters the air duct to absorb the heat of the in-vehicle heat exchange module 202 and output it to the outside of the vehicle to meet the heat dissipation requirements of the equipment heat exchange module 203. In this way, the running time of the air conditioning system can be reduced, thereby reducing the energy consumption of the car and improving the life of the air conditioning and the car.

[0081] More importantly, the heat exchange module 203 can absorb the heat generated by the electrical equipment, thereby reducing energy consumption in heating or defrosting modes. Furthermore, in conjunction with the exterior air vents C of the in-vehicle air supply assembly 301, the compressor 104's operating time can be reduced during heat dissipation, allowing for full utilization of outside air for cooling, further contributing to energy savings.

[0082] In addition, for the specific physical manifestations of the in-vehicle heat exchange module and the equipment heat exchange module, you can refer to the in-vehicle heat exchange structure configuration and equipment heat exchange structure configuration in conventional electric vehicles, and will not be limited or elaborated here.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention. For example, a four-way valve can achieve a similar function by using multiple two-way solenoid valves; a three-way valve can achieve a similar function by replacing it with multiple two-way valves; the relative positions of the components can be changed to achieve a similar function, etc., all of which fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A series automotive heat pump air conditioning system, characterized by, Comprising: a heat pump module, the heat pump module comprising a compressor, an outdoor heat exchanger, a four-way valve, a throttling device and a heat exchanger; the heat exchanger having a first heat exchange flow channel and a second heat exchange flow channel which exchange heat with each other, the compressor, the outdoor heat exchanger and the first heat exchange flow channel being connected with the four-way valve respectively, the throttling device being connected between the outdoor heat exchanger and the first heat exchange flow channel; a liquid circulation module, the liquid circulation module comprising a water pump, an indoor heat exchange module and an equipment heat exchange module, the water pump, the indoor heat exchange module, the equipment heat exchange module and the second heat exchange flow channel being connected in series.

2. The series automotive heat pump air conditioning system of claim 1, wherein, the liquid circulation module further comprising a three-way valve, the three-way valve being configured to control the indoor heat exchange module to selectively communicate with the second heat exchange flow channel and / or the equipment heat exchange module.

3. The series automotive heat pump air conditioning system of claim 2, wherein, an inlet of the three-way valve being connected with an outlet of the indoor heat exchange module, one outlet of the three-way valve being connected with the second heat exchange flow channel, another outlet of the three-way valve being connected with an inlet of the equipment heat exchange module, an outlet of the equipment heat exchange module being connected with the second heat exchange flow channel.

4. The series automotive heat pump air conditioning system of claim 2, wherein, the water pump, the indoor heat exchange module, the three-way valve, the equipment heat exchange module and the second heat exchange flow channel being connected in series to form a first liquid circulation flow path.

5. The series automotive heat pump air conditioning system of claim 2 wherein, the water pump, the indoor heat exchange module, the three-way valve and the second heat exchange flow channel being connected in series to form a second liquid circulation flow path.

6. The series automotive heat pump air conditioning system according to any one of claims 1-5, wherein, liquid flowing out of the second heat exchange flow channel flows through the indoor heat exchange module and the equipment heat exchange module and flows back into the second heat exchange flow channel under the driving action of the water pump.

7. The series automotive heat pump air conditioning system according to any one of claims 1-5, wherein, liquid flowing out of the second heat exchange flow channel enters the indoor heat exchange module and directly flows back into the second heat exchange flow channel without passing through the equipment heat exchange module under the driving action of the water pump.

8. The series automotive heat pump air conditioning system according to any one of claims 1-5, wherein, liquid flowing out of the second heat exchange flow channel enters the indoor heat exchange module, part of the liquid output from the indoor heat exchange module directly flows back into the second heat exchange flow channel, and the remaining liquid output from the indoor heat exchange module first enters the equipment heat exchange module and then flows back into the second heat exchange flow channel under the driving action of the water pump.

9. An electric vehicle, characterized by a series automobile heat pump air conditioning system as claimed in any one of claims 1-8.

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