A waste heat utilization wide-temperature-range heat pump air conditioning system

Abstract

This invention relates to a waste heat utilization wide-temperature-range heat pump air conditioning system. The system includes multiple coolant circuits and multiple refrigerant circuits, which form different modes according to different temperature requirements. The different modes include a driver's cab PTC heating mode, a driver's cab heat pump heating mode, a driver's cab cooling mode, a driver's cab and battery heating mode, a driver's cab and battery cooling mode, a driver's cab heat pump and waste heat heating mode, a driver's cab dehumidification mode, and a driver's cab defogging mode. This invention comprehensively plans the driver's cab thermal management system, adopts heat pump technology, and utilizes the waste heat from the vehicle's power battery and motor to improve the adaptability of the heat pump under low-temperature conditions, reduce driver's cab heating power consumption, and increase the vehicle's driving range.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to a waste heat utilization wide-temperature-range heat pump air conditioning system. Background Technology

[0002] Currently, air conditioning systems in most new energy heavy-duty trucks are independent systems. Cooling is powered by a high-voltage battery-driven electric compressor using a compression-evaporation cooling method, while heating uses high-pressure PTC heating technology. The PTC's energy efficiency ratio (COP) is less than 1; the PTC heating energy efficiency ratio (COP) is also less than 1, resulting in high power consumption, accounting for approximately 6% of the vehicle's range. Furthermore, since both cooling and heating are independent systems, they are not used in a coordinated manner, wasting electricity and reducing the vehicle's range. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a waste heat utilization wide-temperature-range heat pump air conditioning system to solve the aforementioned technical problems.

[0004] This invention is achieved using the following technical solution:

[0005] A waste heat utilization wide-temperature-range heat pump air conditioning system, the system comprising: a battery, a motor, a radiator, an evaporator, an in-vehicle condenser, a heater core, a high-pressure water-heated PTC, a plate heat exchanger, a liquid-cooled condenser, a gas-liquid separator, an electric compressor, multiple four-way water valves, multiple electrically controlled three-way valves, multiple electronic water pumps, and multiple electronic expansion valves connected together to form multiple coolant circuits and multiple refrigerant circuits; the multiple coolant circuits and refrigerant circuits form different operating modes according to different temperature requirements;

[0006] The different operating modes include cab PTC heating mode, cab heat pump heating mode, cab cooling mode, cab and battery heating mode, cab and battery cooling mode, cab heat pump and waste heat heating mode, cab dehumidification mode, and cab defogging mode.

[0007] A further description of the present invention indicates that the coolant circuit includes a first coolant circulation circuit, and / or a second coolant circulation circuit, and / or a third coolant circulation circuit, and / or a fourth coolant circulation circuit;

[0008] The first coolant circulation loop includes: an electronic water pump I, a heater core, a four-way water valve II, a high-pressure water heater PTC, and an electronic water pump I connected in series.

[0009] The second coolant circulation loop includes: an electronic water pump three, a motor, a four-way water valve one, a liquid-cooled condenser, an electronically controlled three-way valve four, a radiator, and an electronic water pump three connected in series.

[0010] The third coolant circulation loop includes: a four-way water valve I, an electronic water pump II, a battery, a plate heat exchanger, a four-way water valve II, and a four-way water valve I connected in series.

[0011] The fourth coolant circulation loop includes: a four-way water valve I, a liquid-cooled condenser, an electrically controlled three-way valve III, an electronic water pump III, a motor, and a four-way water valve I connected in series.

[0012] A further description of the present invention indicates that the refrigerant circuit includes a first refrigerant circulation circuit, and / or a second refrigerant circulation circuit; and / or a third refrigerant circulation circuit, and / or a fourth refrigerant circulation circuit, and / or a fifth refrigerant circulation circuit;

[0013] The first refrigerant circulation loop includes, in series, an electric compressor, an electronically controlled three-way valve one, an electronic expansion valve two, an in-vehicle condenser, an electronically controlled three-way valve three, a liquid-cooled condenser, an electronically controlled three-way valve two, a gas-liquid separator, and an electric compressor.

[0014] The second refrigerant circulation loop includes, in series: an electric compressor, an electronically controlled three-way valve one, an electronically controlled three-way valve two, an in-vehicle condenser, an electronically controlled expansion valve one, an evaporator, a gas-liquid separator, and an electric compressor.

[0015] The third refrigerant circulation loop includes, in series: an electric compressor, an electrically controlled three-way valve one, an electrically controlled three-way valve two, an in-vehicle condenser, an electrically controlled three-way valve three, an electronic expansion valve three, a plate heat exchanger, a gas-liquid separator, and an electric compressor.

[0016] The fourth refrigerant circulation loop includes, in sequence, an electric compressor, an electronically controlled three-way valve one, an electronic expansion valve two, an in-vehicle condenser, an electronically controlled three-way valve three, a liquid-cooled condenser, an electronically controlled three-way valve two, a gas-liquid separator, and an electric compressor.

[0017] The fifth refrigerant circulation loop includes, in series, an electric compressor, an electronically controlled three-way valve one, an electronic expansion valve two, an in-vehicle condenser, an electronically controlled three-way valve three, an electronic expansion valve one, an evaporator, a gas-liquid separator, and an electric compressor.

[0018] A further explanation of the present invention is that, in the PTC heating mode of the cab, the first coolant circulation loop in the coolant circuit is activated.

[0019] A further description of the present invention is that, in the cab heat pump heating mode, the second coolant circulation loop in the coolant circuit and the first refrigerant circulation loop in the refrigerant circuit are activated.

[0020] A further description of the present invention is that, in the cab cooling mode, the second coolant circulation loop in the coolant circuit and the second refrigerant circulation loop in the refrigerant circuit are activated.

[0021] A further description of the present invention is that, in the cab and battery heating mode, the first coolant circulation loop, the third coolant circulation loop, and the fourth coolant circulation loop in the coolant circuit are activated;

[0022] In the cab and battery cooling mode, the second and third coolant circulation loops in the coolant circuit are activated, as are the second and third refrigerant circulation loops in the refrigerant circuit.

[0023] Further explanation of the present invention: in the cab heat pump and waste heat heating mode, the first coolant circulation loop, the second coolant circulation loop and the third coolant circulation loop in the coolant circuit are activated, as well as the first refrigerant circulation loop in the refrigerant circuit is activated.

[0024] A further explanation of the present invention is that, in the dehumidification mode of the cab, the fourth refrigerant circulation loop in the refrigerant circuit is activated.

[0025] In a further description of the present invention, the first, third, and fourth coolant circulation loops in the coolant circuit are activated in the cab defogging mode, and the fifth refrigerant circulation loop in the refrigerant circuit is activated.

[0026] Compared with the prior art, the present invention has the following beneficial technical effects:

[0027] This invention couples the cab air conditioning system with the power battery and motor cooling system to achieve structural and control integration and energy allocation. It adopts a solution that combines waste heat utilization from the motor system and battery system, heat pump heating and PTC heating to reduce the energy consumption of cab heating and increase the vehicle's driving range. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a wide-temperature-range heat pump air conditioning system for waste heat utilization provided by the present invention;

[0030] Figure 2 This is a schematic diagram of the PTC heating mode for the driver's cab provided in an embodiment of the present invention;

[0031] Figure 3This is a schematic diagram of the cab heat pump heating mode provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the cab cooling mode provided in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the cab and battery heating mode provided in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the cab and battery cooling mode provided in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the cab heat pump and waste heat heating mode provided in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the cab dehumidification mode provided in an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the cab defogging mode provided in an embodiment of the present invention.

[0038] In the diagram: 1. Battery; 2. Motor; 3. Radiator; 4. Evaporator; 5. Interior condenser; 6. Heater core; 7. Plate heat exchanger; 8. High-pressure water heating PTC; 9. Liquid-cooled condenser; 10. Gas-liquid separator; 11. Electric compressor; 12. Four-way water valve one; 13. Four-way water valve two; 14. Electronic water pump one; 15. Electronic water pump two; 16. Electronic water pump three; 17. Electrically controlled three-way valve one; 18. Electrically controlled three-way valve two; 19. Electrically controlled three-way valve three; 20. Electrically controlled three-way valve four; 21. Electronic expansion valve one; 22. Electronic expansion valve two; 23. Electronic expansion valve three. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0041] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0042] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0043] Example 1:

[0044] like Figure 1-9 As shown, this embodiment of the invention provides a waste heat utilization wide-temperature-range heat pump air conditioning system. The system includes: a battery 1, a motor 2, a radiator 3, an evaporator 4, an in-vehicle condenser 5, a heater core 6, a plate heat exchanger 7, a high-pressure water heating PTC 8, a liquid-cooled condenser 9, a gas-liquid separator 10, an electric compressor 11, multiple four-way water valves, multiple electrically controlled three-way valves, multiple electronic water pumps, and multiple electronic expansion valves, which are connected to form multiple coolant circuits and multiple refrigerant circuits; the coolant circuits and refrigerant circuits form different operating modes according to different temperature requirements;

[0045] Different operating modes include cab PTC heating mode, cab heat pump heating mode, cab cooling mode, cab and battery heating mode, cab and battery cooling mode, cab heat pump and waste heat heating mode, cab dehumidification mode, and cab defogging mode.

[0046] The coolant circuit includes a first coolant circulation circuit, and / or a second coolant circulation circuit, and / or a third coolant circulation circuit, and / or a fourth coolant circulation circuit.

[0047] The first coolant circulation loop includes: an electronic water pump 14, a heater core 6, a four-way water valve 13, a high-pressure water heater PTC 8, and an electronic water pump 14 connected in series.

[0048] The second coolant circulation loop includes: an electronic water pump 316, a motor 2, a four-way water valve 12, a liquid-cooled condenser 9, an electrically controlled three-way valve 420, a radiator 3, and an electronic water pump 316 connected in series.

[0049] The third coolant circulation loop includes: a four-way water valve 12, an electronic water pump 25, a battery 1, a plate heat exchanger 7, a four-way water valve 23, and a four-way water valve 12 connected in series.

[0050] The fourth coolant circulation loop includes: a four-way water valve 12, a liquid-cooled condenser 9, an electrically controlled three-way valve 19, an electronic water pump 16, a motor 2, and a four-way water valve 12 connected in series.

[0051] In addition, the refrigerant circuit includes a first refrigerant circulation circuit, and / or a second refrigerant circulation circuit; and / or a third refrigerant circulation circuit, and / or a fourth refrigerant circulation circuit, and / or a fifth refrigerant circulation circuit;

[0052] The first refrigerant circulation loop includes, in sequence, an electric compressor 11, an electronically controlled three-way valve 17, an electronically controlled expansion valve 22, an in-vehicle condenser 5, an electronically controlled three-way valve 3 19, a liquid-cooled condenser 9, an electronically controlled three-way valve 2 18, a gas-liquid separator 10, and an electric compressor 11.

[0053] The second refrigerant circulation loop includes: an electric compressor 11, an electronically controlled three-way valve 17, an electronically controlled three-way valve 2 18, an in-vehicle condenser 5, an electronic expansion valve 21, an evaporator 4, a gas-liquid separator 10, and an electric compressor 11 connected in series.

[0054] The third refrigerant circulation loop includes, in sequence, an electric compressor 11, an electrically controlled three-way valve one 17, an electrically controlled three-way valve two 18, an in-vehicle condenser 5, an electrically controlled three-way valve three 19, an electronic expansion valve three 23, a plate heat exchanger 7, a gas-liquid separator 10, and an electric compressor 11.

[0055] The fourth refrigerant circulation loop includes, in series: electric compressor 11, electronically controlled three-way valve 17, electronic expansion valve 22, in-vehicle condenser 5, electronically controlled three-way valve 3 19, liquid-cooled condenser 9, electronically controlled three-way valve 2 18, gas-liquid separator 10, and electric compressor 11.

[0056] The fifth refrigerant circulation loop includes, in sequence, an electric compressor 11, an electronically controlled three-way valve 17, an electronic expansion valve 22, an in-vehicle condenser 5, an electronically controlled three-way valve 3 19, an electronic expansion valve 21, an evaporator 4, a gas-liquid separator 10, and an electric compressor 11.

[0057] The aforementioned high-pressure water heating PTC is used for auxiliary heating of the cab. The high-pressure water heating PTC can be controlled by PWM bus, LIN bus or CAN bus. The electrically controlled three-way valve is used for refrigerant flow control, or a combination of a four-way reversing valve and a solenoid shut-off valve can be used. The electrically controlled four-way valve and the electrically controlled three-way valve are used for coolant flow control. The electronic expansion valve and the temperature and pressure sensor realize refrigerant flow control, or an electronic expansion valve can be combined with a pressure sensor and a temperature sensor, etc.

[0058] like Figure 2 As shown, the first coolant circulation loop in the coolant circuit is activated in the cab PTC heating mode.

[0059] like Figure 3 As shown, in the cab heat pump heating mode, the second coolant circulation loop in the coolant circuit and the first refrigerant circulation loop in the refrigerant circuit are activated.

[0060] like Figure 4 As shown, in the cab cooling mode, the second coolant circulation loop in the coolant circuit and the second refrigerant circulation loop in the refrigerant circuit are activated.

[0061] like Figure 5 As shown, in the cab and battery heating mode, the first coolant circulation loop, the third coolant circulation loop, and the fourth coolant circulation loop in the coolant circuit are activated;

[0062] The first, third, and fourth coolant circulation loops are connected to form a single loop via four-way water valve 12 and four-way water valve 23. Specifically, the loop consists of: electronic water pump 316, motor 2, four-way water valve 12, electronic water pump 215, battery 1, plate heat exchanger 7, four-way water valve 213, heater core 6, electronic water pump 14, high-pressure water heating PTC 8, four-way water valve 213, four-way water valve 12, liquid-cooled condenser 9, electrically controlled three-way valve 420, and electronic water pump 316.

[0063] like Figure 6 As shown, in the cab and battery cooling mode, the second and third coolant circulation loops in the coolant circuit are activated, as are the second and third refrigerant circulation loops in the refrigerant circuit.

[0064] The second and third coolant circulation loops are connected into one loop via four-way water valve 12 and four-way water valve 23. Specifically, the loop consists of: electronic water pump 316, motor 2, four-way water valve 12, electronic water pump 215, battery 1, plate heat exchanger 7, four-way water valve 213, four-way water valve 12, liquid-cooled condenser 9, electrically controlled three-way valve 420, radiator 3, and electronic water pump 316.

[0065] like Figure 7 As shown, in the cab heat pump and waste heat heating mode, the first coolant circulation loop, the second coolant circulation loop and the third coolant circulation loop in the coolant circuit are activated, as well as the first refrigerant circulation loop in the refrigerant circuit is activated.

[0066] The first coolant circulation loop, the second coolant circulation loop, and the third coolant circulation loop are connected into one loop via four-way water valve 12 and four-way water valve 23. Specifically, the loop consists of: electronic water pump 316, motor 2, four-way water valve 12, electronic water pump 215, battery 1, plate heat exchanger 7, four-way water valve 213, heater core 6, electronic water pump 14, high-pressure water heating PTC 8, four-way water valve 213, four-way water valve 12, liquid-cooled condenser 9, electrically controlled three-way valve 420, radiator 3, and electronic water pump 316.

[0067] like Figure 8 As shown, the fourth refrigerant circulation loop in the refrigerant circuit is activated in the cab dehumidification mode.

[0068] like Figure 9 As shown, in the cab defogging mode, the first, third, and fourth coolant circulation loops in the coolant circuit are activated, as well as the fifth refrigerant circulation loop in the refrigerant circuit.

[0069] The first, third, and fourth coolant circulation loops are connected into one loop via four-way water valve 12 and four-way water valve 23. Specifically, the loop consists of: electric water pump 316, motor 2, four-way water valve 12, electric water pump 215, battery 1, plate heat exchanger 7, four-way water valve 213, heater core 6, electric water pump 14, high-pressure water heating PTC 8, four-way water valve 213, four-way water valve 12, liquid-cooled condenser 9, electrically controlled three-way valve 420, and electric water pump 316.

[0070] This invention couples the cab air conditioning system with the power battery and motor cooling system to achieve structural and control integration and energy allocation. It adopts a solution that combines waste heat utilization of the motor system and battery system, heat pump heating and PTC heating to reduce the energy consumption of cab heating and increase the vehicle's driving range. Tests show that the vehicle's driving range is increased by about 3% to 5% in low temperature environments (-30℃ to 15℃).

[0071] Please note that the system of this invention consists of several components and several connecting pipes, the number of which can be arranged as needed without limitation; it can realize the various functions mentioned above, and the implementation method is as follows:

[0072] 1) In low-temperature environments (T≤0℃), when parked, the cab has an independent water circuit, and the cab is heated by a high-pressure PTC8 water heater to heat the coolant;

[0073] 2) When driving in a low-temperature environment (-10℃≤T<0℃), when the water temperature of the motor cooling circuit reaches the threshold, the electric compressor 11 is started. The refrigerant absorbs the heat of the motor cooling circuit through the liquid-cooled condenser 9 and releases the heat through the vehicle condenser 5 to heat the cab.

[0074] 3) When driving in low temperature environment (-25℃≤T<-10℃), when the water temperature of the motor cooling circuit reaches the threshold, the electric compressor 11 is started. The refrigerant absorbs the heat of the motor cooling circuit through the liquid-cooled condenser 9 and releases the heat through the vehicle condenser 5 to heat the cab. At the same time, the waste heat of the motor is used to heat the cab through the heater core 6.

[0075] 4) In low-temperature environments (≤-25℃), when driving, the motor circuit, battery circuit and cab water circuit are connected in series by four-way water valve 12 and four-way water valve 23, and the cab is heated by the motor waste heat and high-pressure water heater PTC8; when the cab water temperature is higher than the threshold, the cab can be heated by the motor waste heat alone.

[0076] 5) Under normal conditions (T>0℃), start the electric compressor 11. The refrigerant absorbs heat from the motor cooling circuit through the liquid-cooled condenser 9 and releases heat through the vehicle interior condenser 5 to heat the cab.

[0077] 6) In high-temperature environments, the electric compressor is started, and the refrigerant is cooled by releasing heat in the liquid-cooled condenser 9, and the evaporator 4 is used to cool the cab, while the plate heat exchanger is used to cool the battery circuit coolant.

[0078] The above temperatures are monitored by a temperature sensor and adjusted according to actual conditions.

[0079] Example 2

[0080] like Figure 1-9 As shown, this embodiment of the invention provides a vehicle including the above-mentioned waste heat utilization wide-temperature-range heat pump air conditioning system, which is particularly suitable for new energy heavy trucks, and will not be described in detail here.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A waste heat utilization wide temperature range heat pump air conditioning system, characterized in that, The system comprises: a battery, a motor, a radiator, an evaporator, an in-vehicle condenser, a heater core, a high-pressure water heating PTC, a plate heat exchanger, a liquid-cooled condenser, a gas-liquid separator, an electric compressor, a plurality of four-way valves, a plurality of electrically controlled three-way valves, a plurality of electronic water pumps, and a plurality of electronic expansion valves connected to form a plurality of cooling liquid circuits and a plurality of refrigerant circuits; a plurality of cooling liquid circuits and refrigerant circuits form different operating modes according to different temperature requirements; The different operating modes include a cab PTC heating mode, a cab heat pump heating mode, a cab refrigeration mode, a cab and battery heating mode, a cab and battery refrigeration mode, a cab heat pump and waste heat heating mode, a cab dehumidification mode, and a cab defogging mode; The cooling liquid circuit comprises a first cooling liquid circulation circuit, a second cooling liquid circulation circuit, a third cooling liquid circulation circuit, and a fourth cooling liquid circulation circuit; The first cooling liquid circulation circuit comprises: an electronic water pump one, a heater core, a four-way valve two, a high-pressure water heating PTC, and an electronic water pump one connected in series; The second cooling liquid circulation circuit comprises: an electronic water pump three, a motor, a four-way valve one, a liquid-cooled condenser, an electrically controlled three-way valve four, a radiator, and an electronic water pump three connected in series; The third cooling liquid circulation circuit comprises: a four-way valve one, an electronic water pump two, a battery, a plate heat exchanger, a four-way valve two, and a four-way valve one connected in series; The fourth cooling liquid circulation circuit comprises: a four-way valve one, a liquid-cooled condenser, an electrically controlled three-way valve three, an electronic water pump three, a motor, and a four-way valve one connected in series; The refrigerant circuit comprises a first refrigerant circulation circuit, a second refrigerant circulation circuit, a third refrigerant circulation circuit, a fourth refrigerant circulation circuit, and a fifth refrigerant circulation circuit; The first refrigerant circulation circuit comprises: an electric compressor, an electrically controlled three-way valve one, an electronic expansion valve two, an in-vehicle condenser, an electrically controlled three-way valve three, a liquid-cooled condenser, an electrically controlled three-way valve two, a gas-liquid separator, and an electric compressor connected in series; The second refrigerant circulation circuit comprises: an electric compressor, an electrically controlled three-way valve one, an electrically controlled three-way valve two, an in-vehicle condenser, an electronic expansion valve one, an evaporator, a gas-liquid separator, and an electric compressor connected in series; The third refrigerant circulation circuit comprises: an electric compressor, an electrically controlled three-way valve one, an electrically controlled three-way valve two, an in-vehicle condenser, an electrically controlled three-way valve three, an electronic expansion valve three, a plate heat exchanger, a gas-liquid separator, and an electric compressor connected in series; The fourth refrigerant circulation circuit comprises: an electric compressor, an electrically controlled three-way valve one, an electronic expansion valve two, an in-vehicle condenser, an electrically controlled three-way valve three, a liquid-cooled condenser, an electrically controlled three-way valve two, a gas-liquid separator, and an electric compressor connected in series; The fifth refrigerant circulation circuit comprises: an electric compressor, an electrically controlled three-way valve one, an electronic expansion valve two, an in-vehicle condenser, an electrically controlled three-way valve three, an electronic expansion valve one, an evaporator, a gas-liquid separator, and an electric compressor connected in series.

2. The waste heat utilization wide-temperature-range heat pump air conditioning system according to claim 1, wherein In the cab PTC heating mode, the first cooling liquid circulation circuit in the cooling liquid circuit is enabled.

3. The waste heat utilization wide-temperature-range heat pump air conditioning system according to claim 2, wherein The second coolant circulation circuit in the coolant circuit and the first refrigerant circulation circuit in the refrigerant circuit are enabled in the cab heat pump heating mode.

4. The waste heat utilization wide-temperature-range heat pump air conditioning system according to claim 3, wherein The second coolant circulation circuit in the coolant circuit and the second refrigerant circulation circuit in the refrigerant circuit are enabled in the cab refrigeration mode.

5. The waste heat utilization wide-temperature-range heat pump air conditioning system according to claim 4, wherein The first coolant circulation circuit, the third coolant circulation circuit and the fourth coolant circulation circuit in the coolant circuit are enabled in the cab and battery heating mode. The second coolant circulation circuit and the third coolant circulation circuit in the coolant circuit and the second refrigerant circulation circuit and the third refrigerant circulation circuit in the refrigerant circuit are enabled in the cab and battery refrigeration mode.

6. The waste heat utilization wide-temperature-range heat pump air conditioning system according to claim 5, wherein The first coolant circulation circuit, the second coolant circulation circuit and the third coolant circulation circuit in the coolant circuit and the first refrigerant circulation circuit in the refrigerant circuit are enabled in the cab heat pump and waste heat heating mode.

7. The waste heat utilization wide-temperature-range heat pump air conditioning system according to claim 6, wherein The fourth refrigerant circulation circuit in the refrigerant circuit is enabled in the cab dehumidification mode.

8. The waste heat utilization wide-temperature-range heat pump air conditioning system according to claim 7, wherein The first coolant circulation circuit, the third coolant circulation circuit and the fourth coolant circulation circuit in the coolant circuit and the fifth refrigerant circulation circuit in the refrigerant circuit are enabled in the cab defogging mode.

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