Air conditioning system for motor vehicle

Abstract

An air conditioning system (01) for a motor vehicle, comprising a refrigerant circuit (10). The refrigerant circuit (10) comprises a compressor (100), a first heat exchanger assembly (110), an evaporative condenser (120), and a multi-way valve (130); the first heat exchanger assembly (110) comprises a first expansion device (1101) and an internal evaporator (1102); the internal evaporator (1102) is located downstream of the first expansion device (1101); the multi-way valve (130) comprises an inlet end (1301), a first outlet (1302), and a second outlet (1303); the inlet end (1301) is connected to a position downstream of the compressor (100); the evaporative condenser (120) and the first expansion device (1101) are sequentially arranged downstream of the first outlet (1302); and an internal condenser (140) and the first expansion device (1101) are sequentially arranged downstream of the second outlet (1303). According to the air conditioning system (01), the working mode can be flexibly switched, and there is no need to additionally provide an auxiliary heating element in a heating mode, thereby achieving efficient system performance.

Description

Air conditioning systems for motor vehicles Technical Field

[0001] An embodiment of the present invention relates to an air conditioning system for a motor vehicle. Background Art

[0002] With the rapid development of the manufacturing industry, air conditioning equipment is being installed in motor vehicles to flexibly control the temperature and humidity of the airflow within the cab. Air conditioning equipment includes an air conditioning circuit. Designing a solution that can independently control the temperature and humidity of the airflow within the cab, while reducing the need for external auxiliary equipment and optimizing the design structure of the air conditioning circuit, has become a research topic requiring continuous breakthroughs.

[0003] Utility Model Content

[0004] Generally, when the refrigerant circuit is in heating mode, an air-conditioning system using auxiliary heating equipment has difficulty in independently regulating the air temperature, and the regulation performance of the air-conditioning circuit needs to be improved; at the same time, the system design of the air-conditioning system is relatively complex, and its structural layout needs to be optimized.

[0005] An embodiment of the present invention provides an air conditioning system for a motor vehicle.

[0006] An embodiment of the present utility model provides an air-conditioning system for a motor vehicle, comprising: a refrigerant circuit, the refrigerant circuit including a compressor, a first heat exchanger assembly, an evaporative condenser and a multi-way valve, the first heat exchanger assembly including a first expansion device and an internal evaporator, the internal evaporator being located downstream of the first expansion device; the multi-way valve including an inlet end, a first outlet and a second outlet, the inlet end being connected downstream of the compressor; the evaporative condenser and the first expansion device being arranged in sequence downstream of the first outlet; the internal condenser and the first expansion device being arranged in sequence downstream of the second outlet.

[0007] For example, according to at least one embodiment of the present invention, an air-conditioning system for a motor vehicle is provided, which also includes an air flow channel, in which the internal condenser and the internal evaporator are both arranged, wherein, along the direction of air flow, the internal condenser is located downstream of the internal evaporator.

[0008] For example, in an air-conditioning system for a motor vehicle provided according to at least one embodiment of the present invention, a second expansion device and the evaporative condenser are arranged in sequence downstream of the internal evaporator, wherein the first expansion device, the internal evaporator, the second expansion device, the evaporative condenser and the compressor are connected in series in sequence.

[0009] For example, according to at least one embodiment of the present invention, an air-conditioning system for a motor vehicle is provided, wherein the air-conditioning system also includes a second heat exchanger assembly and a coolant circuit; the second heat exchanger assembly includes a third expansion device and a cooler, and the cooler is located downstream of the third expansion device; the second heat exchanger assembly is connected in parallel with the first heat exchanger assembly in the refrigerant circuit, wherein the cooler is arranged between the refrigerant circuit and the coolant circuit so that the fluid in the refrigerant circuit and the fluid in the coolant circuit can exchange heat.

[0010] For example, according to at least one embodiment of the present invention, an air-conditioning system for a motor vehicle is provided, which further includes a water-cooled condenser, which is located downstream of the compressor in the refrigerant circuit and between the inlet end of the multi-way valve, and the water-cooled condenser is arranged between the refrigerant circuit and the coolant circuit so that the fluid in the refrigerant circuit and the fluid in the coolant circuit can exchange heat.

[0011] For example, according to at least one embodiment of the present invention, an air-conditioning system for a motor vehicle is provided, wherein the coolant circuit includes: a valve assembly and a motor pipe section, a radiator pipe section, a cooler pipe section, a battery pipe section, and a water-cooled condenser pipe section connected by the valve assembly.

[0012] For example, according to at least one embodiment of the present invention, an air-conditioning system for a motor vehicle is provided, and the valve assembly includes a first operating mode. In the first operating mode, the motor pipe section and the radiator pipe section are connected in series in sequence through the valve assembly to form a first coolant sub-circuit, the cooler pipe section is connected in series with the battery pipe section through the valve assembly to form a second coolant sub-circuit, and the water-cooled condenser pipe section is connected in parallel with the motor pipe section.

[0013] For example, according to at least one embodiment of the present invention, the air-conditioning system for a motor vehicle provided, the valve assembly includes a second operating mode. In the second operating mode, the cooler pipe section is connected in series with the battery pipe section through the valve assembly to form a second coolant sub-circuit, the motor pipe section and the radiator pipe section are connected in series with the valve assembly to form a third coolant sub-circuit, and the water-cooled condenser pipe section is disconnected from both the second coolant sub-circuit and the third coolant sub-circuit.

[0014] For example, according to the air-conditioning system for a motor vehicle provided by at least one embodiment of the present invention, the valve assembly includes a third operating mode. In the third operating mode, the battery pipe segment, the cooler pipe segment, the motor pipe segment and the radiator pipe segment are connected in series in sequence through the valve assembly to form a fourth coolant sub-circuit, and the water-cooled condenser pipe segment is disconnected from the fourth coolant sub-circuit.

[0015] For example, according to the air-conditioning system for a motor vehicle provided by at least one embodiment of the present invention, the valve assembly includes a fourth operating mode. In the fourth operating mode, the battery pipe segment, the cooler pipe segment, and the motor pipe segment are connected in series in sequence through the valve assembly to form a fifth coolant sub-circuit, and the water-cooled condenser pipe segment and the radiator pipe segment are both disconnected from the fifth coolant sub-circuit.

[0016] For example, according to the air-conditioning system for a motor vehicle provided by at least one embodiment of the present invention, the valve assembly includes a fifth operating mode. In the fifth operating mode, the battery pipe section, the cooler pipe section and the water-cooled condenser pipe section are connected in series in sequence through the valve assembly to form a sixth coolant sub-circuit, and the motor pipe section and the radiator pipe section are both disconnected from the sixth coolant sub-circuit.

[0017] By switching the multi-way valve to the states corresponding to different outlets, the air-conditioning system can achieve different forms of connectivity between the various components in the air-conditioning system. At the same time, by controlling the opening state of the first expansion device, the air-conditioning system's operating modes such as cooling, dehumidification and self-heating can be flexibly switched. In the heating mode, the air-conditioning system does not require additional auxiliary heating elements. The system layout is compact and easy to control, thus achieving relatively efficient system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, rather than limiting the present invention.

[0019] FIG1 is a schematic diagram of the overall layout of a refrigerant circuit provided by an embodiment of the present utility model.

[0020] FIG2 is a schematic diagram of a refrigerant circuit when the air-conditioning system provided by an embodiment of the present invention is in cooling mode.

[0021] FIG3 is a schematic diagram of a refrigerant circuit when the air-conditioning system provided by an embodiment of the present invention is in a cooling / defog mode.

[0022] FIG4 is a schematic diagram of a refrigerant circuit of the air-conditioning system provided by an embodiment of the present invention when the air-conditioning system is in a demisting / preheating / heating mode.

[0023] FIG5A is a schematic diagram of the overall layout of the coolant circuit provided by an embodiment of the present invention.

[0024] FIG. 5B is a schematic diagram corresponding to the valve assembly in FIG. 5A .

[0025] FIG. 6 is a schematic diagram of a coolant circuit corresponding to the air-conditioning system of FIG. 2 when in a cooling / defog mode.

[0026] FIG. 7 is a schematic diagram of a coolant circuit corresponding to the air conditioning system of FIG. 3 when in a demisting mode.

[0027] FIG. 8 is another coolant circuit schematic diagram corresponding to FIG. 3 when the air conditioning system is in the demisting mode.

[0028] FIG. 9 is a schematic diagram of a coolant circuit corresponding to the air conditioning system of FIG. 4 when in a demisting / preheating mode.

[0029] FIG. 10 is a schematic diagram of a coolant circuit corresponding to the air conditioning system of FIG. 7 when in a heating mode. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0032] Typically, the air conditioning circuit consists of a refrigerant circuit and a coolant circuit. When the ambient temperature is low, the air conditioner can be used to increase the air temperature in the vehicle cabin. In heating mode, the refrigerant circuit typically uses external equipment to supplement the refrigerant, such as a PCT (Positive Temperature Coefficient) heater.

[0033] During the research, the inventors of this application found that when the refrigerant circuit is in heating mode, the air-conditioning system using auxiliary heating equipment is difficult to independently control the air temperature, and the control performance of the air-conditioning circuit needs to be improved; at the same time, the system structure of the air-conditioning system is relatively complex, and its structural layout needs to be optimized.

[0034] At least one embodiment of the present utility model provides an air-conditioning system, comprising: a refrigerant circuit, the refrigerant circuit including a compressor, a first heat exchanger assembly, an evaporative condenser and a multi-way valve, the first heat exchanger assembly including a first expansion device and an internal evaporator, the internal evaporator being located downstream of the first expansion device; the multi-way valve including an inlet end, a first outlet and a second outlet, the inlet end being connected downstream of the compressor; the evaporative condenser and the first expansion device being arranged in sequence downstream of the first outlet; the internal condenser and the first expansion device being arranged in sequence downstream of the second outlet.

[0035] The air-conditioning system can realize different forms of connection between various components in the air-conditioning system by switching the multi-way valve to the states corresponding to different outlets. At the same time, by controlling the opening state of the first expansion device, the cooling, demisting, preheating, and heating working modes of the air-conditioning system can be flexibly switched. The air-conditioning system does not need to add additional auxiliary heating elements in the heating mode, and the structure is compact and easy to control, thereby having efficient system performance.

[0036] The air conditioning system will be described below with reference to the accompanying drawings and through some embodiments.

[0037] Figure 1 is a schematic diagram of the overall layout of the refrigerant circuit provided in an embodiment of the present invention. Figure 2 is a schematic diagram of the refrigerant circuit of the air-conditioning system provided in an embodiment of the present invention when in cooling mode; Figure 3 is a schematic diagram of the refrigerant circuit of the air-conditioning system provided in an embodiment of the present invention when in cooling / defog mode; and Figure 4 is a schematic diagram of the refrigerant circuit of the air-conditioning system provided in an embodiment of the present invention when in defog / preheat / heat mode.

[0038] As shown in FIG1 , an air conditioning system 01 for a motor vehicle includes a refrigerant circuit 10 , which includes a compressor 100 , a first heat exchanger assembly 110 , an evaporative condenser 120 , and a multi-way valve 130 . The first heat exchanger assembly 110 includes a first expansion device 1101 and an internal evaporator 1102 , with the internal evaporator 1102 located downstream of the first expansion device 1101 . For example, the first expansion device 1101 can control the pressure and temperature of the fluid entering the internal evaporator 1102 by varying the degree of opening. The multi-way valve 130 can be a three-way valve including an inlet port 1301 , a first outlet port 1302 , and a second outlet port 1303 , with the inlet port 1301 connected downstream of the compressor 100 .

[0039] As shown in FIG1 , the multi-way valve 130 can include a first control mode and a second control mode. The state shown in FIG1 is a state in which both the first control mode and the second control mode are closed. For example, along the refrigerant flow path, in the first control mode, the evaporative condenser 120 and the first expansion device 1101 are sequentially arranged downstream of the first outlet 1302; and in the second control mode, the internal condenser 140 and the first expansion device 1101 are sequentially arranged downstream of the second outlet 1303. For example, the first control mode may correspond to the refrigerant circuit of the air-conditioning system shown in FIG2 when in cooling mode, and the second control mode may correspond to the refrigerant circuit of the air-conditioning system shown in FIG3 when in cooling / defog mode, or to the refrigerant circuit of the air-conditioning system shown in FIG4 when in defog / preheat / heat mode (for detailed description, see the following embodiments).

[0040] As shown in FIG1 , the first expansion device 1101 can be in any of a fully open state, a closed state, and an intermediate throttling state, depending on the degree of valve opening. For example, the intermediate throttling state may be a state where the valve in the first expansion device 1101 is opened to a certain degree to achieve a throttling effect. Depending on the degree of valve opening, the throttling state of the first expansion device 1101 varies.

[0041] For example, as shown in FIG1 , air conditioning system 01 includes an airflow channel 150, with an internal condenser 140 and an internal evaporator 1102 both disposed within airflow channel 150. In the direction of airflow, internal condenser 140 is located downstream of internal evaporator 1102. For example, internal evaporator 1102 is closer to the airflow inlet of airflow channel 150 than internal condenser 140. For example, when first expansion device 1101 is fully open, the refrigerant flowing through first expansion device 1101 is not throttled, resulting in a higher temperature and pressure for the refrigerant entering internal evaporator 1102. At this point, the airflow passing through internal evaporator 1102 is heated, and internal evaporator 1102 functions as a "heat pump." For example, when the refrigerant temperature in the internal condenser 140 is higher than the refrigerant temperature in the internal evaporator 1102, the internal evaporator 1102 can preheat the airflow in the airflow channel 150. The preheated airflow is then further heated after passing through the internal condenser 140, thereby placing the air conditioning system in, for example, a heating mode, but not limited thereto. For example, when the first expansion device 1101 is in a closed state, the refrigerant will not flow through the first expansion device 1101. For example, when the first expansion device 1101 is in an intermediate throttling state, the temperature and pressure of the refrigerant flowing through the first expansion device 1101 decreases, and when passing through the internal evaporator 1102, it evaporates and absorbs heat, thereby cooling the airflow in the airflow channel 150. In this case, the air conditioning system can be placed in, for example, a cooling mode, but not limited thereto.

[0042] Therefore, by switching multi-way valve 130 to first outlet 1302 or second outlet 1303, air conditioning system 01 can achieve different connectivity modes between various components within system 01, corresponding to, for example, the first and second control modes described above. Furthermore, by controlling the opening state of first expansion device 1101, air conditioning system 01 can flexibly switch between operating modes such as cooling, demisting, preheating, and heating. In heating mode, air conditioning system 01 eliminates the need for additional auxiliary heating elements, resulting in a compact and easily controllable system layout and highly efficient performance.

[0043] For example, as shown in FIG1 , in air conditioning system 01, a second expansion device 160 and an evaporative condenser 120 are sequentially arranged downstream of the internal evaporator 1102. For example, the second expansion device 160 may include a first sub-expansion device 1601 and a second sub-expansion device 1602 connected in parallel. For example, the first sub-expansion device 1601 and the second sub-expansion device 1602 may be selectively opened. For example, the first sub-expansion device 1601 may be a one-way valve, such as, but not limited to, a CV-type one-way valve. The second sub-expansion device 1602 may be a throttle valve. For example, in different control modes of air conditioning system 01, the second expansion device 160 may be located upstream of the evaporative condenser 120, or downstream of the evaporative condenser 120, and the specific setting may be determined according to the control mode.

[0044] For example, as shown in Figures 1 and 2, air conditioning system 01 also includes a second heat exchanger assembly 170 and a coolant circuit 20. Second heat exchanger assembly 170 includes a third expansion device 1701 and a cooler 1702, with cooler 1702 located downstream of third expansion device 1701. For example, third expansion device 1701 may be a throttle valve, which can adjust the temperature and pressure of the refrigerant entering cooler 1702 depending on the opening state of third expansion device 1701. Second heat exchanger assembly 170 is connected in parallel with first heat exchanger assembly 110 in refrigerant circuit 10. Cooler 1702 is arranged between refrigerant circuit 10 and coolant circuit 20 to enable heat exchange between the refrigerant in refrigerant circuit 10 and the coolant in coolant circuit 20. For example, second heat exchanger assembly 170 may have dual fluid channels, allowing the refrigerant in refrigerant circuit 10 and the coolant in coolant circuit 20 to flow through different channels and exchange heat.

[0045] For example, as shown in FIG1 , a water-cooled condenser 180 is further provided between the downstream of the compressor 100 in the refrigerant circuit 10 and the inlet end 1301 of the multi-way valve 130. The water-cooled condenser 180 is also arranged between the refrigerant circuit 10 and the coolant circuit 20 to enable heat exchange between the refrigerant in the refrigerant circuit 10 and the coolant in the coolant circuit 20. Similarly, the water-cooled condenser 180 may also have dual fluid channels, so that the refrigerant in the refrigerant circuit 10 and the coolant in the coolant circuit 20 flow through different flow channels and exchange heat with each other.

[0046] FIG5A is a schematic diagram of the overall layout of a coolant circuit provided in an embodiment of the present invention; FIG5B is a schematic diagram corresponding to the valve assembly in FIG5A .

[0047] For example, corresponding to the refrigerant circuit 10 shown in Figure 1, the coolant circuit 20 in Figure 5A includes a valve assembly 210, and a motor pipe section 211, a radiator pipe section 212, a cooler pipe section 213, a battery pipe section 214 and a water-cooled condenser pipe section 215 connected by the valve assembly 210.

[0048] For example, as shown in Figures 5A and 5B, the valve assembly 210 includes a first coolant valve 231, a second coolant valve 232 and a four-way valve 233, the first coolant valve 231 includes a first port 2101, a second port 2102 and a third port 2103; the second coolant valve 232 includes a fourth port 2104, a fifth port 2105 and a sixth port 2106; the four-way valve 233 includes a seventh port 2107, an eighth port 2108, a ninth port 2109 and a tenth port 2110. The first port 2101 is communicated with the first outlet 241 of the valve assembly 210, the second port 2102 is communicated with the second outlet 242 of the valve assembly 210, and the third port 2103 is communicated with the tenth port 2110 of the four-way valve 233; the fourth port 2104 is communicated with the third outlet 243 of the valve assembly 210, the fifth port 2105 is communicated with the fourth outlet 244 of the valve assembly 210, and the sixth port 2106 is communicated with the seventh port 2107 of the four-way valve 233; the eighth port 2108 is communicated with the fifth outlet 245 of the valve assembly 210, and the ninth port 2109 is communicated with the sixth outlet 246 of the valve assembly 210.

[0049] For example, Figures 5A and 5B illustrate a state where the third port 2103 of the first coolant valve 231 is not connected to either the first port 2101 or the second port 2102, and the fourth port 2104 and the fifth port 2105 of the second coolant valve 232 are not connected to the sixth port 2106. In different operating modes, the third port 2103 of the first coolant valve 231 can be selectively connected to either the first port 2101 or the second port 2102; the sixth port 2106 of the second coolant valve 232 can be selectively connected to either the fourth port 2104 or the fifth port 2105; and the four-way valve 233 can be switchably connected to the first coolant valve 231, the second coolant valve 232, and the fifth outlet 245 and the sixth outlet 246 of the valve assembly 210, respectively, through its internal reversing channel. For details, please refer to the relevant description of the following embodiment.

[0050] FIG. 6 is a schematic diagram of a coolant circuit corresponding to the air-conditioning system of FIG. 2 when in a cooling / defog mode.

[0051] For example, as shown in Figures 2 and 6 , in the control mode of the air conditioning system 01 in the first embodiment, the compressor 100, water-cooled condenser 180, multi-way valve 130, evaporative condenser 120, second expansion device 160, first expansion device 1101, and internal evaporator 1102 are connected in series in the refrigerant circuit 10, and the second heat exchanger assembly 170 is connected in parallel at both ends of the first heat exchanger assembly 110. Specifically, the inlet port 1301 of the multi-way valve 130 is connected to the first outlet port 1302, while the inlet port 1301 of the multi-way valve 130 is disconnected from the second outlet port 1303, thereby disconnecting the internal condenser 140 from the refrigerant circuit 10. The first sub-expansion device 1601 of the second expansion device 160 is located in the refrigerant circuit, downstream of the evaporative condenser 120, while the second sub-expansion device 1602 is disconnected from the refrigerant circuit.

[0052] For example, for the control mode shown in FIG2 , as shown in FIG5B and FIG6 , for coolant circuit 20, valve assembly 210 includes a first operating mode 201. In first operating mode 201, first port 2101 of first coolant valve 231 is connected to third port 2103, and second port 2102 is connected to third port 2103. Fourth port 2104 of second coolant valve 232 is disconnected from sixth port 2106, while fifth port 2105 is connected to sixth port 2106. Seventh port 2107 of four-way valve 233 is connected to tenth port 2110, and eighth port 2108 is connected to ninth port 2109. Consequently, motor section 211 and radiator section 212 are sequentially connected in series through valve assembly 210 to form a first coolant sub-circuit. Cooler section 213 is connected in series with battery section 214 through valve assembly 210 to form a second coolant sub-circuit. Water-cooled condenser section 215 is connected in parallel with motor section 211.

[0053] For example, the air conditioning system 01 shown in FIG2 and FIG6 may correspond to the air conditioning cooling and battery fast charging modes. The external ambient temperature is very high, for example, greater than 28° C. to 30° C., and the battery generates a large amount of heat when in the fast charging mode. The working process of the air conditioning system 01 includes:

[0054] For example, as shown in Figure 2, after the compressor 100 is powered on, the refrigerant passes through the compressor 100 and becomes a high-temperature, high-pressure gas. It then enters the water-cooled condenser 180 for cooling, turning it into liquid refrigerant. For example, the refrigerant circuit 10 is further provided with an internal heat exchanger 190, which has a dual flow path. The refrigerant after passing through the water-cooled condenser 180 and the refrigerant returning to the compressor 100 can exchange heat in the internal heat exchanger 190. The refrigerant then enters the evaporative condenser 120, where its temperature is further reduced. A portion of the refrigerant enters the first heat exchanger assembly 110, while another portion enters the second assembly 170. Due to the high degree of throttling in the first expansion device 1101, the temperature of the refrigerant entering the internal evaporator 1102 is reduced. When air, such as air, is drawn into the airflow channel 150 by the fan, it is cooled by the internal evaporator 1102 and finally discharged from the outlet of the intake airflow channel 150.

[0055] For example, as shown in Figures 2 and 6 , the refrigerant entering second assembly 170 is at a very low temperature and can therefore exchange heat with the coolant in battery tube segment 214, thereby lowering the coolant temperature and, consequently, the battery temperature. Simultaneously, since the refrigerant in water-cooled condenser 180 is at a higher temperature, its heat can be dissipated to the external environment via radiator tube segment 212 . Heat from the motor can also be dissipated to the external environment via radiator tube segment 212 .

[0056] For example, as shown in Figures 3 and 6 , in the control mode of air conditioning system 01 in the second embodiment, in refrigerant circuit 10, compressor 100, water-cooled condenser 180, multi-way valve 130, internal condenser 140, first expansion device 1101, and internal evaporator 1102 are connected in series, with second heat exchanger assembly 170 connected in parallel at both ends of first heat exchanger assembly 110. Specifically, inlet 1301 of multi-way valve 130 is connected to second outlet 1303, while inlet 1301 of multi-way valve 130 is disconnected from first outlet 1302, thereby disconnecting evaporative condenser 120 and second expansion device 160 from refrigerant circuit 10. In coolant circuit 20, the connection method of the various components of valve assembly 210 is consistent with that of the first embodiment.

[0057] For example, the air conditioning system 01 shown in FIG3 and FIG6 may correspond to the air conditioning cooling and demisting mode, and the battery cooling mode. When the external ambient temperature is relatively high, for example, the external ambient temperature is less than 28° C. to 30° C., and the battery is in the fast charging mode and has a large heat generation, the working process of the air conditioning system 01 includes:

[0058] For example, as shown in Figure 3, after the compressor 100 is powered on, the refrigerant passes through the compressor 100 and becomes a high-temperature, high-pressure gas. It then enters the water-cooled condenser 180, where it cools down and becomes liquid refrigerant. The refrigerant that has passed through the water-cooled condenser 180 and the refrigerant that has returned to the compressor 100 undergo heat exchange in the internal heat exchanger 190. The refrigerant then enters the internal condenser 140, heating the airflow in the airflow channel 150. A portion of the refrigerant flowing out of the internal condenser 140 enters the first heat exchanger assembly 110, while another portion enters the second assembly 170. The first expansion device 1101 is in a throttling state, reducing the temperature of the refrigerant entering the internal evaporator 1102. When airflow, such as air, is drawn into the airflow channel 150 by the fan, the internal evaporator 1102 demists the airflow, lowering its temperature. The internal condenser 140 heats this portion of the airflow, ensuring that the airflow exiting the airflow channel 150 is not too cold, thus ensuring a good user experience.

[0059] For example, as shown in Figures 3 and 6, when the refrigerant enters the second assembly 170, the third expansion device 1701 is in a throttling state, thereby reducing the temperature of the refrigerant. The refrigerant then enters the cooler 1702 and exchanges heat with the coolant in the battery tube section 214, thereby reducing the temperature of the coolant and, in turn, the temperature of the battery. At the same time, since the refrigerant in the water-cooled condenser 180 is relatively high, its heat can be dissipated to the external environment through the radiator tube section 212. Heat from the motor can also be dissipated to the external environment through the radiator tube section 212.

[0060] FIG. 7 is a schematic diagram of a coolant circuit corresponding to the air conditioning system of FIG. 3 when in a demisting mode.

[0061] For example, as shown in Figures 3 and 7 , in the control mode of air conditioning system 01 in the third embodiment, the connection method of the various components of refrigerant circuit 10 is consistent with the second embodiment. In coolant circuit 20, valve assembly 210 is in second operating mode 202. In second operating mode 202, cooler pipe section 213 is connected in series with battery pipe section 214 via valve assembly 210 to form a second coolant sub-circuit. Motor pipe section 211 and radiator pipe section 212 are connected in series via valve assembly 210 to form a third coolant sub-circuit. Water-cooled condenser pipe section 215 is disconnected from both the second and third coolant sub-circuits. The difference from the second embodiment is that water-cooled condenser 180 is not connected to the third coolant sub-circuit.

[0062] For example, the air conditioning system 01 shown in Figures 3 and 7 can correspond to the air conditioning defog mode and the battery cooling mode. When the ambient temperature is low, for example, less than 18°C ​​to 20°C, and the battery generates a large amount of heat when in fast charging mode, the working process of the air conditioning system 01 includes:

[0063] For example, as shown in Figure 3, after passing through compressor 100, the refrigerant becomes a high-temperature, high-pressure gas. It then enters water-cooled condenser 180 for cooling, transforming into liquid refrigerant. The refrigerant then enters internal condenser 140, heating the airflow in airflow channel 150. A portion of the refrigerant exiting internal condenser 140 enters first heat exchanger assembly 110, while another portion enters second assembly 170. First expansion device 1101 is in a throttling state, lowering the temperature of the refrigerant entering internal evaporator 1102. When airflow, such as air, is drawn into airflow channel 150 by the fan, internal evaporator 1102 demists the airflow, lowering its temperature. Because the refrigerant does not undergo heat exchange in water-cooled condenser 180, the refrigerant temperature in internal condenser 140 is relatively high, thereby heating the airflow passing through internal evaporator 1102, significantly increasing its temperature and ensuring a better user experience.

[0064] For example, as shown in Figures 3 and 7, when the refrigerant enters the second assembly 170, the third expansion device 1701 is in a throttling state, thereby reducing the temperature of the refrigerant. The refrigerant then enters the cooler 1702 and exchanges heat with the coolant in the battery tube segment 214, thereby reducing the temperature of the battery. At the same time, the heat in the motor can be dissipated to the external environment through the radiator tube segment 212.

[0065] FIG. 8 is another coolant circuit schematic diagram corresponding to FIG. 3 when the air conditioning system is in the demisting mode.

[0066] For example, as shown in Figures 3 and 8 , in the control mode of air conditioning system 01 in the fourth embodiment, the connection method of the various components of refrigerant circuit 10 is consistent with the second embodiment. In coolant circuit 20, valve assembly 210 is in third operating mode 203. In third operating mode 203, battery section 214, cooler section 213, motor section 211, and radiator section 212 are connected in series via valve assembly 210 to form a fourth coolant sub-circuit. Water-cooled condenser section 215 is disconnected from the fourth coolant sub-circuit.

[0067] For example, as shown in FIG3 and FIG8 , the air conditioning system 01 may correspond to the air conditioning demisting and battery cooling mode. When the external ambient temperature is relatively low, for example, less than 13° C. to 15° C., the working process of the air conditioning system 01 includes:

[0068] For example, as shown in FIG3 , after the refrigerant passes through the compressor 100, it becomes a high-temperature, high-pressure gas and enters the water-cooled condenser 180. The refrigerant then enters the internal condenser 140 and heats the airflow in the airflow channel 150. A portion of the refrigerant discharged from the internal condenser 140 enters the first heat exchanger assembly 110, and another portion of the refrigerant enters the second assembly 170. The first expansion device 1101 is in a throttling state and reduces the temperature of the refrigerant entering the internal evaporator 1102. When the airflow, such as air, is sucked into the airflow channel 150 by the fan, the internal evaporator 1102 can defog the airflow and reduce the airflow temperature. Since the refrigerant does not undergo heat exchange in the water-cooled condenser 180, the temperature of the internal condenser 140 is relatively high, which can heat the airflow flowing through the internal evaporator 1102, thereby significantly increasing its temperature to ensure user experience.

[0069] For example, as shown in Figures 3 and 8 , when the refrigerant enters second assembly 170, third expansion device 1701 is in a throttling state, thereby reducing the refrigerant temperature. The refrigerant then enters cooler 1702, where it exchanges heat with the coolant in battery tube section 214, thereby reducing the battery temperature. Because motor tube section 211 is connected in series with second assembly 170, the temperature of the motor can also be reduced by the refrigerant in cooler 1702.

[0070] FIG. 9 is a schematic diagram of a coolant circuit corresponding to the air conditioning system of FIG. 4 when in a demisting / preheating mode.

[0071] For example, as shown in Figures 4 and 9 , in the control mode of the air conditioning system 01 in the fifth embodiment, the internal condenser 140, internal heat exchanger 190, and water-cooled condenser 180 are located upstream of the first expansion device 1101. The first expansion device 1101, internal evaporator 1102, second expansion device 160, evaporative condenser 120, and compressor 100 are connected in series. The inlet port 1301 of the multi-way valve 130 is connected to the second outlet port 1303, while the inlet port 1301 of the multi-way valve 130 is disconnected from the first outlet port 1302. The second sub-expansion device 1602 of the second expansion device 160 is located in the refrigerant circuit and downstream of the internal evaporator 1102. The first sub-expansion device 1601 is disconnected from the refrigerant circuit.

[0072] For example, corresponding to the control mode in FIG4 , as shown in FIG5B and FIG9 , in coolant circuit 20, valve assembly 210 includes a fourth operating mode 204. In fourth operating mode 204, second port 2102 of first coolant valve 231 is connected to third port 2103, while first port 2101 is disconnected from third port 2103. Fourth port 2104 of second coolant valve 232 is connected to sixth port 2106, while fifth port 2105 is disconnected from sixth port 2106. Seventh port 2107 of four-way valve 233 is connected to eighth port 2108, while ninth port 2109 is connected to tenth port 2110. Consequently, battery segment 214, cooler segment 213, and motor segment 211 are sequentially connected in series through valve assembly 210 to form a fifth coolant sub-circuit. Water-cooled condenser segment 215 and radiator segment 212 are disconnected from the fifth coolant sub-circuit.

[0073] For example, the air conditioning system 01 shown in FIG4 and FIG9 may correspond to the air conditioning demisting mode. The external ambient temperature is relatively low, for example, less than 13° C. to 15° C.; the battery temperature is higher than the external ambient temperature, for example, less than 15° C. to 25° C. The working process of the air conditioning system 01 includes:

[0074] After passing through compressor 100, the refrigerant becomes a high-temperature, high-pressure gas and then enters water-cooled condenser 180. Next, the refrigerant enters internal condenser 140 to heat the airflow in airflow channel 150. The refrigerant flowing out of internal condenser 140 enters first heat exchanger assembly 110. First expansion device 1101 is in a slightly throttled state, slightly reducing the temperature of the refrigerant entering internal evaporator 1102 to facilitate demisting the airflow. The refrigerant then flows out of internal evaporator 1102 and passes through second sub-expansion device 1602 into evaporative condenser 120. Second sub-expansion device 1602 is in a throttled state, reducing the refrigerant pressure. In evaporative condenser 120, it absorbs heat from the external environment before returning to compressor 100 through internal heat exchanger 190. Third expansion device 1701 is in a closed state, disconnecting second assembly 170 from the refrigerant circuit. In this operating mode, the refrigerant entering the internal condenser 140 is at a higher temperature, facilitating heating of the airflow and thus ensuring a better user experience. As shown in FIG9 , the refrigerant does not undergo heat exchange in the second assembly 170 . The motor tube section 211 is connected in series with the battery tube section 214 . The motor temperature is higher than the ambient temperature. Therefore, the heat generated by the motor during operation can be used to increase the battery temperature. For example, heat can be transferred to the motor when the motor is stalled, but this is not limited to this.

[0075] For example, as shown in FIG. 4 and FIG. 9 , in the control mode of the air-conditioning system 01 in the sixth embodiment, the arrangement of the components in the refrigerant circuit 10 and the refrigerant circuit 20 is the same as that in the fifth embodiment.

[0076] For example, as shown in FIG4 and FIG9 , the air conditioning system 01 may also correspond to the air conditioning preheating mode. When the external ambient temperature is relatively low, for example, less than 25° C. to 30° C., the working process of the air conditioning system 01 includes:

[0077] After passing through the compressor 100, the refrigerant becomes a high-temperature and high-pressure gas and enters the water-cooled condenser 180. Then, the refrigerant enters the internal condenser 140 and heats the airflow in the airflow channel 150. Subsequently, the refrigerant flowing out of the internal condenser 140 enters the first heat exchanger assembly 110. The first expansion device 1101 is in a fully open state, so that the temperature of the refrigerant is not reduced, so that the temperature of the refrigerant entering the internal evaporator 1102 is higher, and is used to preheat the airflow entering the airflow channel 150. For example, the internal evaporator 1102 acts as a "heat pump". Since the internal condenser 140 is located upstream of the internal evaporator 1102 and is located near the outlet of the airflow channel 150, the internal condenser 140 can be used to heat the airflow preheated by the internal evaporator 1102. The refrigerant flows from the internal evaporator 1102 and passes through the second sub-expansion device 1602 into the evaporative condenser 120. The second sub-expansion device 1602 is in a throttling state, reducing the pressure of the refrigerant. The refrigerant absorbs heat from the external environment in the evaporative condenser 120 and then flows back to the compressor 100 through the internal heat exchanger 190. The third expansion device 1701 is in a closed state, disconnecting the second component 170 from the refrigerant circuit. As shown in Figure 9, the refrigerant does not undergo heat exchange in the second component 170. The motor tube section 211 and the battery tube section 214 are connected in series, so that the temperature of the battery can be increased by the heat generated by the motor during operation. For example, the heat can be transferred to the motor when the motor is locked, but this is not limited to this. For example, when the temperature of the motor and the battery are both 25°C to 30°C, the motor and the battery can be in normal operating conditions. At this time, the motor can transfer less heat to the battery.

[0078] FIG. 10 is a schematic diagram of a coolant circuit corresponding to the air conditioning system of FIG. 4 when in a heating mode.

[0079] For example, as shown in Figures 4 and 10 , in the control mode of the air conditioning system 01 in the seventh embodiment, the arrangement of the various components in the refrigerant circuit 10 is the same as that in the fifth embodiment. The valve assembly 210 includes a fifth operating mode 205. In the fifth operating mode 205, the second port 2102 of the first coolant valve 231 is connected to the third port 2103, while the first port 2101 and the third port 2103 are disconnected. The fourth port 2104 of the second coolant valve 232 is connected to the sixth port 2106, while the fifth port 2105 and the sixth port 2106 are disconnected. The seventh port 2107 of the four-way valve 233 is connected to the eighth port 2108, while the ninth port 2109 and the tenth port 2110 are connected. As a result, the battery section 214, the cooler section 213, and the water-cooled condenser section 215 are sequentially connected in series through the valve assembly 210 to form a sixth coolant sub-circuit. The motor section 211 and the radiator section 212 are disconnected from the sixth coolant sub-circuit.

[0080] For example, as shown in FIG4 and FIG10 , the air conditioning system 01 may also correspond to the air conditioning heating mode. When the external ambient temperature is relatively low, for example, less than -15°C to -18°C, the working process of the air conditioning system 01 includes:

[0081] After being pressurized by the compressor 100, the refrigerant becomes a high-temperature, high-pressure gas and enters the water-cooled condenser 180, where its temperature is reduced. The refrigerant then enters the internal condenser 140, heating the airflow in the airflow channel 150. A portion of the refrigerant flowing out of the internal condenser 140 enters the first heat exchanger assembly 110. The first expansion device 1101 is fully open, thus not reducing the temperature of the refrigerant. This results in a higher temperature for the refrigerant entering the internal evaporator 1102 and serves to preheat the airflow entering the airflow channel 150. For example, the internal evaporator 1102 acts as a "heat pump." Because the internal condenser 140 is located upstream of the internal evaporator 1102 and near the outlet of the airflow channel 150, the internal condenser 140 can be used to heat the airflow preheated by the internal evaporator 1102. The refrigerant flows from the internal evaporator 1102 and passes through the second sub-expansion device 1602 into the evaporative condenser 120. Second sub-expansion device 1602 is in a slightly throttled state, slightly reducing the refrigerant pressure. Furthermore, due to the low ambient temperature, the evaporative condenser 120 absorbs almost no heat from the outside environment. Finally, the refrigerant flows back to the compressor 100 through the internal heat exchanger 190. Another portion of the refrigerant flowing from the internal condenser 140 enters the third expansion device 1701, which is in a slightly throttled state, slightly reducing the refrigerant temperature. As shown in Figure 10, the refrigerant and coolant exchange heat in the second assembly 170 and then in the water-cooled condenser 180. This allows the refrigerant to transfer heat to the sixth coolant sub-loop, heating the battery and maintaining normal operating conditions.

[0082] For example, as shown in Figures 4 and 10, when the air conditioning system 01 is in heating mode, the refrigerant absorbs almost no heat from the external environment. Instead, the compressor 100 performs work, converting electrical energy into thermal energy, so that the refrigerant entering the internal condenser 140 can heat the airflow in the airflow channel. At the same time, the refrigerant can also transfer heat to the coolant circuit to heat the battery. For example, through the work of the compressor 100, the heating of the airflow by the internal condenser 140, and the cooling of the refrigerant by the evaporative condenser 120, a "triangular cycle" self-heating mode is formed in the air conditioning system 01. In this heating mode, there is no need to use additional auxiliary heating elements to heat the airflow. Instead, the conversion of electrical energy into thermal energy is directly utilized to transfer heat to components such as the internal condenser 140, thereby achieving a "self-heating" effect. At the same time, the various components in the air conditioning system 01 are compactly arranged and easy to control, resulting in relatively efficient system performance.

[0083] It should be noted that the control modes of the air conditioning system described above are only a few preferred solutions provided by the present invention, and the embodiments of the present invention are not limited thereto. To adapt to changes in the external environment, different communication modes between various components in the air conditioning system can be implemented. By controlling the opening state of the first expansion device, the air conditioning system's operating modes, such as cooling, demisting, and self-heating, can be flexibly switched and controlled.

[0084] For example, the air conditioning system provided by the embodiments of the present invention can be used in battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), range-extended electric vehicles (EVs), fuel cell electric vehicles (FCEVs), etc. For example, after being discharged through the air flow channel, the air flow enters the vehicle's cab, thereby adjusting the temperature and humidity in the cab to optimize the user experience.

[0085] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An air conditioning system (01) for a motor vehicle, characterized in that: include: A refrigerant circuit (10), the refrigerant circuit (10) comprising: Compressor (100); A first heat exchanger assembly (110) comprising a first expansion device (1101) and an internal evaporator (1102), wherein the internal evaporator (1102) is located downstream of the first expansion device (1101); Evaporative condenser (120); a multi-way valve (130), comprising an inlet end (1301), a first outlet (1302) and a second outlet (1303), wherein the inlet end (1301) is connected downstream of the compressor (100); The evaporative condenser (120) and the first expansion device (1101) are sequentially arranged downstream of the first outlet (1302); An internal condenser (140) and the first expansion device (1101) are arranged in sequence downstream of the second outlet (1303).

2. The air conditioning system (01) for a motor vehicle according to claim 1, characterized in that It also includes an air flow channel (150), wherein the internal condenser (140) and the internal evaporator (1102) are both arranged in the air flow channel (150). Wherein, along the direction of air flow, the internal condenser (140) is located downstream of the internal evaporator (1102).

3. The air conditioning system (01) for a motor vehicle according to claim 1, characterized in that: A second expansion device (160) and the evaporative condenser (120) are arranged in sequence downstream of the internal evaporator (1102), wherein the first expansion device (1101), the internal evaporator (1102), the second expansion device (160), the evaporative condenser (120) and the compressor (100) are connected in series in sequence.

4. The air conditioning system (01) for a motor vehicle according to claim 1, characterized in that The air conditioning system (01) further comprises a second heat exchanger assembly (170) and a coolant circuit (20); The second heat exchanger assembly (170) comprises a third expansion device (1701) and a cooler (1702), wherein the cooler (1702) is located downstream of the third expansion device (1701); The second heat exchanger assembly (170) is connected in parallel with the first heat exchanger assembly (110) in the refrigerant circuit (10), wherein the cooler (1702) is arranged between the refrigerant circuit (10) and the coolant circuit (20) so that the refrigerant circuit (10) The fluid exchanges heat with the fluid in the coolant circuit (20).

5. The air conditioning system (01) for a motor vehicle according to claim 4, characterized in that The air conditioning system (01) further comprises a water-cooled condenser (180), wherein the water-cooled condenser (180) is located downstream of the compressor (100) in the refrigerant circuit (10) and between an inlet end (1301) of the multi-way valve (130), The water-cooled condenser (180) is arranged between the refrigerant circuit (10) and the coolant circuit (20) so that the fluid in the refrigerant circuit (10) and the fluid in the coolant circuit (20) perform heat exchange.

6. The air conditioning system (01) for a motor vehicle according to claim 5, characterized in that The coolant circuit (20) comprises: a valve assembly (210); and A motor pipe section (211), a radiator pipe section (212), a cooler pipe section (213), a battery pipe section (214), and a water-cooled condenser pipe section (215) connected via the valve assembly (210).

7. The air conditioning system (01) for a motor vehicle according to claim 6, characterized in that The valve assembly (210) comprises a first operating mode (201), in which: The motor pipe section (211) and the radiator pipe section (212) are connected in series in sequence through the valve assembly (210) to form a first coolant sub-circuit; the cooler pipe section (213) is connected in series with the battery pipe section (214) through the valve assembly (210) to form a second coolant sub-circuit; and the water-cooled condenser pipe section (215) is connected in parallel with the motor pipe section (211).

8. The air conditioning system (01) for a motor vehicle according to claim 6, characterized in that The valve assembly (210) comprises a second operating mode (202), in which the valve assembly (210) comprises a second operating mode (202), The cooler pipe section (213) is connected in series with the battery pipe section (214) through the valve assembly (210) to form a second coolant sub-circuit, the motor pipe section (211) and the radiator pipe section (212) are connected in series with the valve assembly (210) to form a third coolant sub-circuit, and the water-cooled condenser pipe section (215) is disconnected from both the second coolant sub-circuit and the third coolant sub-circuit.

9. The air conditioning system (01) for a motor vehicle according to claim 6, characterized in that The valve assembly (210) comprises a third operating mode (203), in which: The battery pipe section (214), the cooler pipe section (213), the motor pipe section (211) and The radiator pipe sections (212) are sequentially connected in series through the valve assembly (210) to form a fourth coolant sub-loop, and the water-cooled condenser pipe section (215) is disconnected from the fourth coolant sub-loop.

10. The air conditioning system (01) for a motor vehicle according to claim 6, characterized in that The valve assembly (210) includes a fourth operating mode (204), in which: The battery pipe section (214), the cooler pipe section (213), and the motor pipe section (211) are sequentially connected in series through the valve assembly (210) to form a fifth coolant sub-loop, and the water-cooled condenser pipe section (215) and the radiator pipe section (212) are both disconnected from the fifth coolant sub-loop.

11. The air conditioning system (01) for a motor vehicle according to claim 6, characterized in that The valve assembly (210) comprises a fifth operating mode (205), in which: The battery pipe section (214), the cooler pipe section (213) and the water-cooled condenser pipe section (215) are sequentially connected in series through the valve assembly (210) to form a sixth coolant sub-loop, and the motor pipe section (211) and the radiator pipe section (212) are both disconnected from the sixth coolant sub-loop.

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