Photovoltaic-thermal coupling integrated heat pump air conditioning system for new energy refrigerated truck

Abstract

The application relates to the technical field of air conditioning systems, in particular to a photovoltaic-photothermal coupling integrated new energy heat pump air conditioning system for a refrigerated truck, which comprises an outside heat exchanger, a refrigerated truck compartment heat exchanger, a cab heat exchanger and a compressor. One end of the outside heat exchanger is connected with one end of the compressor through a fourth electromagnetic valve, a four-way reversing valve is arranged between the fourth electromagnetic valve and the compressor, the other end of the compressor is connected with one end of the cab heat exchanger through a ninth electromagnetic valve, and the other end of the cab heat exchanger is connected with the other end of the outside heat exchanger through a twelfth electronic expansion valve and a seventh electronic expansion valve. In winter, the application can utilize the refrigeration of the refrigerated truck compartment to supply heat for the cab, realize waste heat utilization, utilize the waste heat generated by photovoltaic panel power generation to defrost the outside heat exchanger, and improve the heat exchange efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of air conditioning systems, in particular to a photovoltaic-photothermal coupled integrated new energy refrigerated truck heat pump air conditioning system. BACKGROUND

[0002] Under the background of achieving the carbon peak and carbon neutralization target, the outstanding contradiction between scale expansion and carbon emission control is faced, and a new type of low-emission long-endurance refrigerated truck is urgently needed to realize healthy and sustainable development. At present, the cab air conditioning system and the refrigerated truck compartment refrigeration system of most pure electric new energy refrigerated trucks are separately arranged, which are two independent systems, and the PTC heating of the pure electric vehicle in winter will cause the endurance to shrink. In view of this, the cab air conditioning system and the refrigerated truck compartment refrigeration system are coupled together and part of the electronic equipment is driven by photovoltaic in the work, in winter, the waste heat generated by the photovoltaic panel is used for defrosting when the heat pump air conditioning system is used for heating in winter, so as to ensure the stable heating and non-stop defrosting of the air conditioning system. Compared with the traditional pure electric refrigerated truck, the endurance mileage of the work is longer, the energy consumption is lower, and the work has a wide application prospect.

[0003] The photovoltaic-thermal system (PV / T) generates electricity mainly by using the photovoltaic effect of a semiconductor, which is usually called "photovoltaic effect". The semiconductor is full of P-N junctions. The P-type semiconductor is mainly composed of electrons, and the N-type semiconductor is mainly composed of holes. When the two are in contact, a P-N junction is formed at the contact. According to the electric field barrier, the internal arrangement can be divided into a conduction band and a valence band. When sunlight shines on the P-N junction, the originally balanced electrons absorb solar energy and jump from the valence band to the conduction band, thereby forming a potential difference between the conduction band and the valence band to form an electric current.

[0004] The photovoltaic-thermal (PV / T) system heat collecting module is composed of a heat collecting plate and a heat collecting pipe. The heat collecting plate is used to absorb the heat of the photovoltaic panel, and the heat medium in the heat collecting pipe transports the heat to the water tank for storage. The waste heat generated by the photovoltaic panel for power generation can be collected for defrosting when the heat pump air conditioning system is used for heating in winter, and the efficiency of photovoltaic power generation can be improved.

[0005] Based on the above considerations, the application designs a photovoltaic-thermal coupled integrated new energy refrigerated truck heat pump air conditioning system. SUMMARY

[0006] The application aims at overcoming the defects of the prior art, and provides a new energy refrigerated truck heat pump air conditioning system with photovoltaic-thermal coupling utilization, which couples a cab air conditioning system and a refrigerated truck compartment refrigeration system together, uses the refrigeration of the refrigerated truck compartment to heat the cab in winter, realizes waste heat utilization, uses the waste heat generated by photovoltaic panel power generation to defrost the external heat exchanger, and improves the heat exchange efficiency; compared with a traditional pure electric refrigerated truck, the new energy refrigerated truck has a longer driving range and a lower energy consumption, and has a wide application prospect.

[0007] In order to achieve the object of the application, the technical scheme adopted by the application is:

[0008] The application discloses a new energy refrigerated truck heat pump air conditioning system with photovoltaic-thermal coupling utilization, which comprises an external heat exchanger, a refrigerated truck compartment heat exchanger, a cab heat exchanger and a compressor, one end of the external heat exchanger is connected with one end of the compressor through a fourth electromagnetic valve, a four-way reversing valve is arranged between the fourth electromagnetic valve and the compressor, the other end of the compressor is connected with one end of the cab heat exchanger through a ninth electromagnetic valve, the other end of the cab heat exchanger is connected with the other end of the external heat exchanger through a twelfth electronic expansion valve and a seventh electronic expansion valve, the seventh electronic expansion valve and the twelfth electronic expansion valve are respectively connected with a sixth electromagnetic valve and an eleventh electromagnetic valve in parallel, the fourth electromagnetic valve and the ninth electromagnetic valve are connected through a pipeline, the pipeline is provided with a fifth electromagnetic valve and an eighth electromagnetic valve, one end of the refrigerated truck compartment heat exchanger is connected with the pipeline between the fifth electromagnetic valve and the eighth electromagnetic valve, and the other end of the refrigerated truck compartment heat exchanger is connected with the pipeline between the seventh electronic expansion valve and the twelfth electronic expansion valve through a tenth electronic expansion valve.

[0009] The application further comprises a water tank, a photovoltaic-thermal module and a pump, one end of the water tank is connected with one end of the photovoltaic-thermal module through the pump, the other end of the photovoltaic-thermal module is connected with one end of the external heat exchanger through a third electromagnetic valve, the other end of the water tank is connected with the other end of the external heat exchanger through a first electromagnetic valve, one end of the third electromagnetic valve and the photovoltaic-thermal module are connected with one end of a cold storage pipeline, the other end of the cold storage pipeline is connected between the first electromagnetic valve and one end of the water tank, and the cold storage pipeline is provided with a second electromagnetic valve.

[0010] The photovoltaic-thermal module comprises a solar cell panel, a heat collecting plate and a heat collecting pipe, the heat collecting pipe is communicated with the water tank, the photovoltaic-thermal module is fixed to the top of the refrigerated truck compartment, and the photovoltaic-thermal system (PV / T) heat collecting module is composed of the heat collecting plate and the heat collecting pipe. The heat collecting plate is used for absorbing the heat of the photovoltaic panel, and the heat medium in the heat collecting pipe delivers the heat to the water tank for storage. Thus, the waste heat generated by photovoltaic panel power generation can be collected to defrost the heat pump air conditioning system when the heat pump air conditioning system is used for heating in winter, and the efficiency of photovoltaic power generation can be improved.

[0011] The fan is installed outside the vehicle heat exchanger, the refrigerated vehicle compartment heat exchanger and the cab heat exchanger.

[0012] The vehicle heat exchanger is a fin heat exchanger, and the vehicle heat exchanger comprises a refrigerant pipeline and a glycol pipeline.

[0013] The beneficial effects of the present application are:

[0014] (1) Coupling the cab air conditioning system and the refrigerated vehicle compartment refrigeration system.

[0015] (2) Waste heat utilization. In winter, through the coupling system, the heat exchanger of the refrigerated vehicle compartment is used as an evaporator, and the heat exchanger of the cab is used as a condenser.

[0016] (3) Photovoltaic power generation. Solar energy is a clean and renewable energy.

[0017] (4) Waste heat utilization. The photovoltaic panel generates a large amount of heat during power generation, and the waste heat generated by the photovoltaic panel during power generation can be used for defrosting of the heat pump air conditioning system in winter to ensure stable heating and uninterrupted defrosting of the air conditioning system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the air conditioning system in the present application.

[0019] Figure 2 The figure is a schematic diagram of the vehicle heat exchanger structure in the present application. DETAILED DESCRIPTION

[0020] The present application will be further described below in conjunction with the drawings and examples:

[0021] Reference Figures 1-2 .

[0022] The application discloses a photovoltaic and photo-thermal coupling integrated new energy heat pump air conditioning system for a refrigerated truck, which comprises an outside heat exchanger 1, a refrigerated truck compartment heat exchanger 2, a cab heat exchanger 3 and a compressor 4, one end of the outside heat exchanger 1 is connected with one end of the compressor 4 through a fourth electromagnetic valve 14, a four-way reversing valve 5 is arranged between the fourth electromagnetic valve 14 and the compressor 4, the other end of the compressor 4 is connected with one end of the cab heat exchanger 3 through a ninth electromagnetic valve 19, the other end of the cab heat exchanger 3 is connected with the other end of the outside heat exchanger 1 through a twelfth electronic expansion valve 22 and a seventh electronic expansion valve 17, the seventh electronic expansion valve 17 and the twelfth electronic expansion valve 22 are respectively connected with a sixth electromagnetic valve 16 and an eleventh electromagnetic valve 21 in parallel, the fourth electromagnetic valve 14 and the ninth electromagnetic valve 19 are connected through a pipeline, the pipeline is provided with a fifth electromagnetic valve 15 and an eighth electromagnetic valve 18, one end of the refrigerated truck compartment heat exchanger 2 is connected with the pipeline between the fifth electromagnetic valve 15 and the eighth electromagnetic valve 18, and the other end is connected with the pipeline between the seventh electronic expansion valve 17 and the twelfth electronic expansion valve 22 through a tenth electronic expansion valve 20.

[0023] Working principle:

[0024] Summer (three modes)

[0025] The refrigerated truck compartment is closed, and the cab is refrigerated (mode 1): the fourth, sixth and ninth electromagnetic valves 14, 16 and 19 are opened; the fifth, eighth and eleventh electromagnetic valves 15, 18 and 21 are closed; the twelfth electronic expansion valve 22 is opened; the seventh and tenth electronic expansion valves 7 and 10 are closed; the refrigerant is discharged from the compressor 4, flows through the outside heat exchanger 1 to release heat, the cab heat exchanger 3 to absorb heat, and finally returns to the compressor 4.

[0026] The refrigerated truck compartment is refrigerated, and the cab is closed (mode 2): the fourth, sixth and eighth electromagnetic valves 14, 16 and 18 are opened; the fifth, ninth and eleventh electromagnetic valves 15, 19 and 21 are closed; the tenth electronic expansion valve 20 is opened; the seventh and twelfth electronic expansion valves 7 and 22 are closed; the refrigerant is discharged from the compressor 4, flows through the outside heat exchanger 1 to release heat, the refrigerated truck compartment heat exchanger 2 to absorb heat, and finally returns to the compressor 4.

[0027] The refrigerated truck compartment is refrigerated, and the cab is refrigerated (mode 3): the fourth, sixth, eighth and ninth electromagnetic valves 14, 16, 18 and 19 are opened; the fifth and eleventh electromagnetic valves 15 and 21 are closed; the tenth and twelfth electronic expansion valves 20 and 22 are opened; the seventh electronic expansion valve 17 is closed; the refrigerant is discharged from the compressor 4, flows through the outside heat exchanger 1 to release heat, and is respectively introduced into the cab heat exchanger 3 to absorb heat and the refrigerated truck compartment heat exchanger 2 to absorb heat, and finally flows together to return to the compressor 4.

[0028] Winter (five modes)

[0029] Refrigerated compartment closed, cab heating (mode 4): four-way reversing valve 5 switching; fourth, sixth, ninth solenoid valves 14, 16, 19 open; fifth, eighth, eleventh solenoid valves 15, 18, 21 closed; twelfth electronic expansion valve 22 open; seventh, tenth electronic expansion valves 27, 20 closed; refrigerant from the compressor 4, through the cab heat exchanger 3 heat release, outdoor heat exchanger 1 heat absorption, eventually back to the compressor 4.

[0030] Refrigerated compartment cooling, cab heating (outdoor heat exchanger closed, mode 5): four-way reversing valve 5 switching; fifth, ninth, eleventh solenoid valves 15, 19, 21 open; fourth, sixth, eighth solenoid valves 14, 16, 18 closed; tenth electronic expansion valve 20 open; seventh, twelfth electronic expansion valves 17, 22 closed; refrigerant from the compressor 4, through the cab heat exchanger 3 heat release, refrigerated compartment heat exchanger 2 heat absorption, eventually back to the compressor 4.

[0031] Refrigerated compartment cooling, cab heating (outdoor heat exchanger to bear part of the cold load, mode 6): four-way reversing valve 5 switching; fourth, fifth, ninth, eleventh solenoid valves 14, 15, 19, 21 open; sixth, eighth solenoid valves 16, 18 closed; seventh, tenth electronic expansion valves 17, 20 open; twelfth electronic expansion valve 22 closed; refrigerant from the compressor 4, through the cab heat exchanger 3 heat release, respectively into the outdoor heat exchanger 1 heat absorption and refrigerated compartment heat exchanger 2 heat absorption, after the joint eventually back to the compressor 4.

[0032] Heat collection (mode 7): second solenoid valve 12 open; first, third solenoid valves 11, 13 closed; refrigerant from the pump 23, through the water tank 6 heat release, photovoltaic photothermal module 7 heat absorption.

[0033] Defrosting (mode 8): first, third solenoid valves 11, 13 open; second solenoid valve 12 closed; refrigerant from the pump 23, through the water tank 6, photovoltaic photothermal module 7 heat absorption, outdoor heat exchanger heat release defrosting.

[0034] Reference Figure 2 .

[0035] The outdoor heat exchanger 1 of the case is a finned heat exchanger with independent refrigerant pipeline and ethylene glycol pipeline. The heat exchanger is placed outside the vehicle. The refrigerant pipeline carries refrigerant, the refrigerant inlet 101 of the refrigerant pipeline is connected with the seventh electronic expansion valve 17, and the refrigerant outlet 102 of the refrigerant pipeline is connected with the fourth solenoid valve 14 to complete the system circulation. The ethylene glycol pipeline carries ethylene glycol, the ethylene glycol inlet 103 of the ethylene glycol pipeline is connected with the first solenoid valve 11, and the ethylene glycol outlet 104 of the ethylene glycol pipeline is connected with the third solenoid valve 13 to use the waste heat generated by the solar panel to defrost.

[0036] Compared with the existing new energy refrigerated truck

[0037] The work develops a photovoltaic-thermal coupled integrated new energy refrigerated truck heat pump air conditioning system for cold chain transportation, which has the advantages of compact structure, energy saving and environmental protection.

[0038] Compared with the existing pure electric new energy refrigerated truck, the work ingeniously couples the cab air conditioning system and the refrigerated truck compartment system together, thereby reducing one compressor and one heat exchanger and its associated components.

[0039] Through the coupling system, in winter, the refrigerated truck compartment refrigeration is used to heat the cab, realize waste heat utilization, and reduce energy consumption; when the temperature of the refrigerated truck compartment is lower than-22℃, the digital control is connected to the outside heat exchanger as an evaporator to share part of the cold load of the refrigerated truck compartment, avoiding the temperature of the refrigerated truck compartment being too low.

[0040] The work will lay photovoltaic-thermal plates on the top of the refrigerated truck compartment, use photovoltaic to drive part of the electronic equipment, reduce the load of the main battery, and improve the endurance mileage.

[0041] The work uses photovoltaic-thermal (PV / T) technology, in winter, through the flow of heat medium, the waste heat generated by photovoltaic panels is used for defrosting of the heat pump air conditioning system, improves the efficiency of the whole vehicle heat pump air conditioning, and ensures the stable heating and non-stop defrosting of the air conditioning system.

[0042] The above is only an embodiment of the application, and does not limit the patent scope of the application, any equivalent transformation or direct or indirect application in related technical fields using the content of the application specification and drawings is also included in the patent protection scope of the application.

Claims

1. A new energy refrigeration truck heat pump air conditioning system integrated with photovoltaic-photothermal coupling utilization, characterized in that: It includes the car outside heat exchanger (1), the refrigerated car compartment heat exchanger (2), the cab heat exchanger (3) and the compressor (4), one end of the car outside heat exchanger (1) is connected with one end of the compressor (4) through the fourth electromagnetic valve (14), the fourth electromagnetic valve (14) and the compressor (4) are equipped with four-way reversing valve (5), the other end of the compressor (4) is connected with one end of the cab heat exchanger (3) through the ninth electromagnetic valve (19), the other end of the cab heat exchanger (3) is connected with the other end of the car outside heat exchanger (1) through the twelfth electronic expansion valve (22) and the seventh electronic expansion valve (17), the seventh electronic expansion valve (17) and the twelfth electronic expansion valve (22) are respectively connected with the sixth electromagnetic valve (16) and the eleventh electromagnetic valve (21) in parallel; the fourth electromagnetic valve (14) and the ninth electromagnetic valve (19) are connected through the pipeline, the pipeline is equipped with the fifth electromagnetic valve (15) and the eighth electromagnetic valve (18), one end of the refrigerated car compartment heat exchanger (2) is connected with the pipeline between the fifth electromagnetic valve (15) and the eighth electromagnetic valve (18), the other end is connected with the pipeline between the seventh electronic expansion valve (17), the twelfth electronic expansion valve (22) through the tenth electronic expansion valve (20); it also includes water tank (6), photovoltaic light heat module (7) and pump (23), one end of the water tank (6) is connected with one end of the photovoltaic light heat module (7) through the pump (23), the other end of the photovoltaic light heat module (7) is connected with one end of the car outside heat exchanger (1) through the third electromagnetic valve (13), the other end of the water tank (6) is connected with the other end of the car outside heat exchanger (1) through the first electromagnetic valve (11); the third electromagnetic valve (13) and one end of the photovoltaic light heat module (7) are connected with one end of the heat storage pipeline (9), the other end of the heat storage pipeline (9) is connected between the first electromagnetic valve (11) and one end of the water tank (6), the heat storage pipeline (9) is equipped with the second electromagnetic valve (12); the car outside heat exchanger (1) is a finned heat exchanger, the car outside heat exchanger (1) includes refrigerant pipeline and ethylene glycol pipeline, the refrigerant inlet (101) of the refrigerant pipeline is connected with the seventh electronic expansion valve (17), the refrigerant outlet (102) of the refrigerant pipeline is connected with the fourth electromagnetic valve (14); the ethylene glycol inlet (103) of the ethylene glycol pipeline is connected with the first electromagnetic valve (11), the ethylene glycol outlet (104) of the ethylene glycol pipeline is connected with the third electromagnetic valve (13).

2. The integrated new energy heat pump air conditioning system for photovoltaic and photo-thermal coupled refrigeration vehicles according to claim 1, characterized in that: The photovoltaic light heat module (7) includes solar cell panel, heat collecting plate and heat collecting pipe, the heat collecting pipe is communicated with the water tank (6), the photovoltaic light heat module (7) is fixed on the top of the refrigerated car compartment.

3. The integrated new energy heat pump air conditioning system for photovoltaic and photo-thermal coupled refrigeration vehicles according to claim 1, characterized in that: The fan (10) is installed on the outside of the car outside heat exchanger (1), the refrigerated car compartment heat exchanger (2) and the cab heat exchanger (3).

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