Waste heat utilization wide-temperature-range heat pump air conditioning system

Abstract

The invention relates to a waste heat utilization wide-temperature-range heat pump air conditioning system which comprises a plurality of cooling liquid loops and a plurality of refrigerant loops, and the multiple cooling liquid loops and the multiple refrigerant loops form different modes according to different temperature requirements. The different modes comprise 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 demisting mode; the cab heat management system is planned as a whole, the heat pump technology is adopted, the vehicle power battery and motor waste heat are utilized, the adaptability of the heat pump under the low-temperature condition is improved, the cab heating power consumption is reduced, and the endurance mileage of the vehicle is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and particularly to a waste heat utilization wide-temperature range heat pump air conditioning system. Background Art

[0002] Currently, the air conditioners of new energy heavy trucks are generally independent systems, that is, refrigeration uses battery high-voltage electricity to drive an electric compressor as the power source and adopts the compression evaporation refrigeration method, and heating uses the high-voltage PTC heating technology. The energy efficiency ratio COP of PTC is <1; the energy efficiency ratio COP of PTC heating is <1, with high power consumption, accounting for about 6% of the vehicle's cruising range. Moreover, both air conditioning refrigeration and heating are independent systems and cannot be coordinated for utilization, wasting some electric energy and reducing the vehicle's cruising range. Summary of the Invention

[0003] The purpose of the present invention is to provide a waste heat utilization wide-temperature range heat pump air conditioning system in view of the deficiencies of the prior art to solve the above technical problems.

[0004] The present invention is implemented by the following technical solutions:

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

[0006] 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.

[0007] Further description of the present invention, 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 circuit includes: sequentially connecting an electronic water pump one, a heater core, a four-way water valve two, a high-voltage water heater PTC, and an electronic water pump one in series;

[0009] The second coolant circulation circuit includes: sequentially connecting 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 in series;

[0010] The third coolant circulation loop includes: 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 in sequence;

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

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

[0013] The first refrigerant circulation loop includes: an electric compressor, an electronic control three-way valve one, an electronic expansion valve two, an in-vehicle condenser, an electronic control three-way valve three, a liquid-cooled condenser, an electronic control three-way valve two, a gas-liquid separator, and an electric compressor connected in series in sequence;

[0014] The second refrigerant circulation loop includes: an electric compressor, an electronic control three-way valve one, an electronic control 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 in sequence;

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

[0016] The fourth refrigerant circulation loop includes: an electric compressor, an electronic control three-way valve one, an electronic expansion valve two, an in-vehicle condenser, an electronic control three-way valve three, a liquid-cooled condenser, an electronic control three-way valve two, a gas-liquid separator, and an electric compressor connected in series in sequence;

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

[0018] For further description of the present invention, the first coolant circulation loop in the coolant circuit is enabled in the cab PTC heating mode.

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

[0020] For further description of the present invention, the second coolant circulation loop in the coolant circuit is enabled in the cab refrigeration mode, and the second refrigerant circulation loop in the refrigerant circuit is enabled.

[0021] For further description of the present invention, 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 loop are enabled;

[0022] In the cab and battery cooling mode, the second coolant circulation loop and the third coolant circulation loop in the coolant loop are enabled, and the second refrigerant circulation loop and the third refrigerant circulation loop in the refrigerant loop are enabled.

[0023] For further description 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 loop are enabled, and the first refrigerant circulation loop in the refrigerant loop is enabled.

[0024] For further description of the present invention, in the cab dehumidification mode, the fourth refrigerant circulation loop in the refrigerant loop is enabled.

[0025] For further description of the present invention, in the cab defogging mode, the first coolant circulation loop, the third coolant circulation loop, and the fourth coolant circulation loop in the coolant loop are enabled, and the fifth refrigerant circulation loop in the refrigerant loop is enabled.

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

[0027] The present invention couples the cab air conditioning system with the power battery and motor cooling systems to achieve structural and control integration and overall energy distribution. A solution combining waste heat utilization of the motor system and battery system, heat pump heating, and PTC heating is adopted to reduce the energy consumption of cab heating and improve the vehicle's cruising range. Description of the Drawings

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

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

[0030] Figure 2 is the schematic diagram of the cab PTC heating mode provided by the embodiment of the present invention;

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

[0032] Figure 4 It is a schematic diagram of the refrigeration mode of the cab provided by an embodiment of the present invention;

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

[0034] Figure 6 It is a schematic diagram of the cab and battery refrigeration mode provided by an embodiment of the present invention;

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

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

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

[0038] In the figure: 1. Battery; 2. Motor; 3. Radiator; 4. Evaporator; 5. In-vehicle condenser; 6. Heater core; 7. Plate heat exchanger; 8. High-voltage 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. Electric control three-way valve one; 18. Electric control three-way valve two; 19. Electric control three-way valve three; 20. Electric control three-way valve four; 21. Electronic expansion valve one; 22. Electronic expansion valve two; 23. Electronic expansion valve three. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0040] Exemplary embodiments will be described in detail here, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0041] The terms used in the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a", "the", and "said" used in the present invention and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" used herein refers to and encompasses any and 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 the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0043] Embodiment 1:

[0044] As Figures 1-9 shown, the embodiment of the present invention provides a waste heat utilization wide-temperature range heat pump air conditioning system, which 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 heater PTC 8, a liquid-cooled condenser 9, a gas-liquid separator 10, an electric compressor 11, a plurality of four-way water valves, a plurality of electronically controlled three-way valves, a plurality of electronic water pumps, a plurality of electronic expansion valves, etc. are connected to form a plurality of coolant circuits and a plurality of refrigerant circuits; the coolant circuits and the refrigerant circuits form different operating modes according to different temperature requirements;

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

[0046] Among them, 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 circuit includes: an electronic water pump one 14, a heater core 6, a four-way water valve two 13, a high-pressure water heater PTC 8, and an electronic water pump one 14 connected in series in sequence;

[0048] The second coolant circulation circuit includes: an electronic water pump three 16, a motor 2, a four-way water valve one 12, a liquid-cooled condenser 9, an electronically controlled three-way valve four 20, a radiator 3, and an electronic water pump three 16 connected in series in sequence;

[0049] The third coolant circulation circuit includes: a four-way water valve 12, an electronic water pump 15, a battery 1, a plate heat exchanger 7, a four-way water valve 13, and a four-way water valve 12 connected in series in sequence;

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

[0051] And, 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 circuit includes: 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 19, a liquid-cooled condenser 9, an electronically controlled three-way valve 18, a gas-liquid separator 10, and an electric compressor 11 connected in series in sequence;

[0053] The second refrigerant circulation circuit includes: an electric compressor 11, an electronically controlled three-way valve 17, an electronically controlled three-way valve 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 in sequence;

[0054] The third refrigerant circulation circuit includes: an electric compressor 11, an electronically controlled three-way valve 17, an electronically controlled three-way valve 18, an in-vehicle condenser 5, an electronically controlled three-way valve 19, an electronic expansion valve 23, a plate heat exchanger 7, a gas-liquid separator 10, and an electric compressor 11 connected in series in sequence;

[0055] The fourth refrigerant circulation circuit includes: 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 19, a liquid-cooled condenser 9, an electronically controlled three-way valve 18, a gas-liquid separator 10, and an electric compressor 11 connected in series in sequence;

[0056] The fifth refrigerant circulation circuit includes: 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 19, an electronic expansion valve 21, an evaporator 4, a gas-liquid separator 10, and an electric compressor 11 connected in series in sequence.

[0057] The above-mentioned high-voltage water heating PTC is used for cab auxiliary heating. The control method of the high-voltage water heating PTC can be controlled and connected by PWM bus, LIN bus or CAN bus. The electronically controlled three-way valve is used for controlling the refrigerant flow direction, and a combination of a four-way reversing valve and an electromagnetic cut-off valve can also be used; the electronically controlled four-way valve and the electronically controlled three-way valve are the same as those for controlling the coolant flow direction; the electronic expansion valve and the temperature and pressure sensor are used to realize the refrigerant flow control, and a method combining the electronic expansion valve with the pressure sensor and the temperature sensor can also be used, etc.

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

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

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

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

[0062] The first coolant circulation loop, the third coolant circulation loop, and the fourth coolant circulation loop are connected into a loop through the first four-way water valve 12 and the second four-way water valve 13. Specifically: the third electronic water pump 16, the motor 2, the first four-way water valve 12, the second electronic water pump 15, the battery 1, the plate heat exchanger 7, the second four-way water valve 13, the heater core 6, the first electronic water pump 14, the high-voltage water heater PTC 8, the second four-way water valve 13, the first four-way water valve 12, the liquid-cooled condenser 9, the fourth electronic control three-way valve 20, the third electronic water pump 16.

[0063] As Figure 6 shown, the second coolant circulation loop and the third coolant circulation loop in the coolant circuit, and the second refrigerant circulation loop and the third refrigerant circulation loop in the refrigerant circuit are enabled in the cab and battery refrigeration mode;

[0064] The second coolant circulation loop and the third coolant circulation loop are connected into a loop through the first four-way water valve 12 and the second four-way water valve 13. Specifically: the third electronic water pump 16, the motor 2, the first four-way water valve 12, the second electronic water pump 15, the battery 1, the plate heat exchanger 7, the second four-way water valve 13, the first four-way water valve 12, the liquid-cooled condenser 9, the fourth electronic control three-way valve 20, the radiator 3, the third electronic water pump 16.

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

[0066] The first coolant circulation loop, the second coolant circulation loop, and the third coolant circulation loop are connected into a loop through the first four-way water valve 12 and the second four-way water valve 13. Specifically: the third electric water pump 16, the motor 2, the first four-way water valve 12, the second electric water pump 15, the battery 1, the plate heat exchanger 7, the second four-way water valve 13, the heater core 6, the first electric water pump 14, the high-voltage water heater PTC 8, the second four-way water valve 13, the first four-way water valve 12, the liquid-cooled condenser 9, the fourth electric control three-way valve 20, the radiator 3, the third electric water pump 16.

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

[0068] As Figure 9 shown, the first coolant circulation loop, the third coolant circulation loop, and the fourth coolant circulation loop in the coolant circuit are enabled in the cab defogging mode, and the fifth refrigerant circulation loop in the refrigerant circuit is enabled.

[0069] The first coolant circulation loop, the third coolant circulation loop, and the fourth coolant circulation loop are connected into a loop through the first four-way water valve 12 and the second four-way water valve 13. Specifically: the third electric water pump 16, the motor 2, the first four-way water valve 12, the second electric water pump 15, the battery 1, the plate heat exchanger 7, the second four-way water valve 13, the heater core 6, the first electric water pump 14, the high-voltage water heater PTC 8, the second four-way water valve 13, the first four-way water valve 12, the liquid-cooled condenser 9, the fourth electric control three-way valve 20, the third electric water pump 16.

[0070] The present invention couples the cab air-conditioning system with the power battery and the motor cooling system to achieve structural and control integration and overall energy distribution. A solution combining the waste heat utilization of the motor system and the battery system, heat pump heating, and PTC heating is adopted to reduce the energy consumption of cab heating and improve the vehicle's cruising range. Tests show that the cruising range of the vehicle increases by about 3% - 5% in a low-temperature environment (-30°C to 15°C);

[0071] Please note that the system of the present invention is composed of several components and several connecting pipelines, and the quantity can be arranged according to requirements without limitation; the above various functions can be achieved, and the implementation methods are as follows:

[0072] 1) In a low-temperature environment (T ≤ 0°C), when parked, the cab water circuit is independent, and the coolant is heated by the high-voltage water heater PTC 8 to achieve cab heating;

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

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

[0075] 4) When driving in a low-temperature environment (T ≤ -25°C), the four-way water valve 12 and the four-way water valve 13 connect the motor circuit, the battery circuit and the cab water circuit in series, and use the waste heat of the motor and the high-voltage water heater PTC 8 to heat the cab; when the water temperature of the cab water circuit is higher than the threshold value, the waste heat of the motor can be used alone to realize cab heating.

[0076] 5) In a normal environment (T > 0°C), start the electric compressor 11. The refrigerant absorbs the heat of the motor cooling circuit through the liquid-cooled condenser 9 and releases heat through the in-vehicle condenser 5 to heat the cab.

[0077] 6) In a high-temperature environment, start the electric compressor. The refrigerant releases heat and cools in the liquid-cooled condenser 9, realizes cab refrigeration through the evaporator 4, and cools the coolant of the battery circuit through the plate heat exchanger.

[0078] The above temperatures are monitored by temperature sensors and adjusted according to the actual situation.

[0079] Embodiment 2

[0080] As Figures 1-9 shown, the embodiment of the present invention provides a vehicle, including the above-mentioned waste heat utilization wide-temperature zone heat pump air conditioning system, which is especially applicable to new energy heavy trucks and will not be described in detail here.

[0081] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall 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 includes: a battery, a motor, a radiator, an evaporator, an in-vehicle condenser, a heater core, a high-voltage water heater PTC, a plate heat exchanger, a liquid-cooled condenser, a gas-liquid separator, an electric compressor, a plurality of four-way water valves, a plurality of electronically controlled three-way valves, a plurality of electric water pumps, and a plurality of electronic expansion valves connected to form a plurality of coolant circuits and a plurality of refrigerant circuits; the plurality of coolant 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.

2. The waste heat utilization wide-temperature range heat pump air conditioning system according to claim 1, wherein 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. The first coolant circulation circuit includes: an electric water pump one, a heater core, a four-way water valve two, a high-voltage water heater PTC, and an electric water pump one connected in series in sequence. The second coolant circulation circuit includes: an electric 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 electric water pump three connected in series in sequence. The third coolant circulation circuit includes: a four-way water valve one, an electric water pump two, a battery, a plate heat exchanger, a four-way water valve two, and a four-way water valve one connected in series in sequence. The fourth coolant circulation circuit includes: a four-way water valve one, a liquid-cooled condenser, an electronically controlled three-way valve three, an electric water pump three, a motor, and a four-way water valve one connected in series in sequence.

3. The waste heat utilization wide temperature range heat pump air conditioning system according to claim 2, characterized in 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. The first refrigerant circulation circuit includes: 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 connected in series in sequence. The second refrigerant circulation circuit includes: an electric compressor, an electronically controlled three-way valve one, an electronically 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 in sequence. The third refrigerant circulation circuit includes: an electric compressor, an electronically controlled three-way valve one, an electronically controlled three-way valve two, an in-vehicle condenser, an electronically 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 in sequence. The fourth refrigerant circulation circuit includes: 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 connected in series in sequence. The fifth refrigerant circulation circuit includes: 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 connected in series in sequence.

4. The waste heat utilization wide-temperature range heat pump air conditioning system according to claim 3, characterized in that, In the cab PTC heating mode, the first coolant circulation circuit in the coolant circuit is enabled.

5. The waste heat utilization wide temperature range heat pump air conditioning system according to claim 4, characterized in that, Enable the second coolant circulation loop in the coolant circuit and the first refrigerant circulation loop in the refrigerant circuit in the cab heat pump heating mode.

6. The waste heat utilization wide temperature range heat pump air conditioning system according to claim 5, characterized in that, Enable the second coolant circulation loop in the coolant circuit and the second refrigerant circulation loop in the refrigerant circuit in the cab refrigeration mode.

7. The waste heat utilization wide-temperature range heat pump air conditioning system according to claim 6, characterized in that, Enable the first coolant circulation loop, the third coolant circulation loop, and the fourth coolant circulation loop in the coolant circuit in the cab and battery heating mode; Enable the second coolant circulation loop and the third coolant circulation loop in the coolant circuit, and the second refrigerant circulation loop and the third refrigerant circulation loop in the refrigerant circuit in the cab and battery refrigeration mode.

8. The waste heat utilization wide temperature range heat pump air conditioning system according to claim 7, wherein, Enable the first coolant circulation loop, the second coolant circulation loop, and the third coolant circulation loop in the coolant circuit, and the first refrigerant circulation loop in the refrigerant circuit in the cab heat pump and waste heat heating mode.

9. The waste heat utilization wide temperature range heat pump air conditioning system according to claim 8, characterized in that Enable the fourth refrigerant circulation loop in the refrigerant circuit in the cab dehumidification mode.

10. The waste heat utilization wide temperature range heat pump air conditioning system according to claim 9, characterized in that Enable the first coolant circulation loop, the third coolant circulation loop, and the fourth coolant circulation loop in the coolant circuit, and the fifth refrigerant circulation loop in the refrigerant circuit in the cab defogging mode.

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