CN117698377A - Air-supplementing enthalpy-increasing heat pump air conditioner integrated heat management system for electric bus - Google Patents

Air-supplementing enthalpy-increasing heat pump air conditioner integrated heat management system for electric bus Download PDF

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Publication number
CN117698377A
CN117698377A CN202311241021.8A CN202311241021A CN117698377A CN 117698377 A CN117698377 A CN 117698377A CN 202311241021 A CN202311241021 A CN 202311241021A CN 117698377 A CN117698377 A CN 117698377A
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China
Prior art keywords
heat exchanger
core body
expansion valve
compressor
air
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CN202311241021.8A
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Chinese (zh)
Inventor
赵朋举
吴志培
邓荣斌
朱平礼
郭军峰
张道凯
金林田
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Zhengzhou Kelin Motor Vehicle Air Conditioning Co Ltd
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Zhengzhou Kelin Motor Vehicle Air Conditioning Co Ltd
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Priority to CN202311241021.8A priority Critical patent/CN117698377A/en
Publication of CN117698377A publication Critical patent/CN117698377A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00321—Heat exchangers for air-conditioning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
    • B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
    • B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

An integrated heat management air conditioning system and method for an electric bus air supplementing and enthalpy increasing heat pump are provided, wherein a four-way valve is connected to a high-pressure side of a compressor, and an outdoor core body is connected with two branches: the outdoor core body is connected with the battery heat management heat exchanger through a first one-way valve, the battery heat management heat exchanger is connected with the inlet side of the gas-liquid separator, and the outlet side of the gas-liquid separator is connected with the low-pressure side of the compressor; the outdoor core body is connected with the main expansion valve, the outlet of the main expansion valve is also divided into two paths, and one path is connected with the battery thermal management heat exchanger through the second one-way valve; the other path is connected with an indoor core body through an air supplementing intermediate heat exchanger, and the indoor core body is connected with a four-way valve; the first end of the air supplementing intermediate heat exchanger is connected with the middle pressure side of the compressor, the second end of the air supplementing intermediate heat exchanger is connected with the main way expansion valve through the heat exchanging air supplementing expansion valve, the third end of the air supplementing intermediate heat exchanger is directly connected with the main way expansion valve, and the fourth end of the air supplementing intermediate heat exchanger is connected with the indoor core body. The invention combines the functions of high-temperature refrigeration, normal-temperature heating, low-temperature heating, defrosting, cooling and heat management of the refrigeration battery, cooling and heat management of the heating battery and the like.

Description

Air-supplementing enthalpy-increasing heat pump air conditioner integrated heat management system for electric bus
Technical Field
The invention belongs to the field of bus thermal management, and particularly relates to an integrated thermal management air conditioning system of an air supplementing and enthalpy increasing heat pump for an electric bus.
Background
The low-temperature heating energy efficiency is high, the normal-temperature heating energy efficiency is high, the ultra-low-temperature heat pump air conditioning system has the own difficult problems that the requirements of refrigeration, heating and low-temperature heating are met, the specification of a throttling element required by large mass flow of a system refrigerant under the conditions of rated refrigeration and high-temperature refrigeration is large, the specification of a throttling element required by small mass flow of the system refrigerant is small when the ultra-low-temperature heating is carried out due to low evaporation temperature, the system can cause the effects that the reliability of the air conditioner is reduced, the low-temperature heating energy is poor and cannot be adjusted due to the fact that the single throttling element is used as an air conditioning product.
In summary, the technical defects of the prior art scheme are as follows:
(1) The air conditioner low-temperature air-supplementing enthalpy-increasing system for buses in the market is few and cannot be suitable for northern cold areas.
(2) The existing air supplementing and enthalpy increasing system does not integrate the function of a thermal management system, and cannot adjust the thermal management of the whole vehicle.
(3) The existing air conditioning systems in the market share the same throttling element for refrigeration and heating, and have low reliability, poor low-temperature heating energy, incapability of realizing accurate low-temperature adjustment, incapability of adjusting ultralow temperature and the like.
Disclosure of Invention
The invention aims to solve the technical problems that: the system solves the problem that the mass flow of the low-temperature heat pump system in the prior art cannot be considered, and aims to provide an integrated heat management air conditioning system of the air supplementing and enthalpy increasing heat pump for the electric bus.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
an integrated heat management air conditioning system of an air supplementing and enthalpy increasing heat pump for an electric bus comprises a compressor, wherein a four-way valve is connected to the high pressure side of the compressor and is respectively connected with the compressor, an outdoor core body, a gas-liquid separator and an indoor core body; wherein, outdoor core connects two branches, and one of them branch road is: the outdoor core body is connected with the battery heat management heat exchanger through a first one-way valve, the battery heat management heat exchanger is connected with the inlet side of the gas-liquid separator, and the outlet side of the gas-liquid separator is connected with the low-pressure side of the compressor; the other branch is: the outdoor core body is connected with the main expansion valve, the outlet of the main expansion valve is also divided into two paths, and one path is connected with the battery thermal management heat exchanger through the second one-way valve; the other path is connected with an indoor core body through an air supplementing intermediate heat exchanger, and the indoor core body is connected with a four-way valve;
the first end of the air supplementing intermediate heat exchanger is connected with the middle pressure side of the compressor, the second end of the air supplementing intermediate heat exchanger is connected with the main way expansion valve through the heat exchanging air supplementing expansion valve, the third end of the air supplementing intermediate heat exchanger is directly connected with the main way expansion valve, and the fourth end of the air supplementing intermediate heat exchanger is connected with the indoor core body; the first end connected with the middle pressure side of the compressor and the second end connected with the heat exchange and air supplementing expansion valve are positioned on the same side of the air supplementing middle heat exchanger; the third end connected with the main expansion valve and the fourth end connected with the indoor core body are positioned on the same side of the air supplementing intermediate heat exchanger.
The main expansion valves are two main expansion valves connected in parallel; during refrigeration, the two main expansion valves are throttling elements and are synchronously controlled; when heating, one main expansion valve is a throttling element, the other main expansion valve is a non-throttling element, and the main expansion valve of the non-throttling element is connected with a third one-way valve.
The refrigerant outlet side of the outdoor core body is connected with a bidirectional drying filter.
A bidirectional filter is arranged between the air supplementing intermediate heat exchanger and the indoor core body.
The inlet side of the battery heat management heat exchanger is provided with a heat exchanger expansion valve.
An integrated heat management air conditioner control method of an air supplementing and enthalpy increasing heat pump for an electric bus comprises a refrigeration cycle control method and a heating cycle control method;
the refrigeration cycle control method comprises the following steps: the first inlet of the four-way valve is connected with the high-pressure side of the compressor, the second inlet of the four-way valve is connected with the inner core body of the chamber, the first outlet of the four-way valve is connected with the outer core body of the chamber, and the second outlet of the four-way valve is connected with the gas-liquid separator; at this time, refrigerant gets into outdoor core through the cross valve after discharging from the compressor, after outdoor core, divide into two branch roads, and first branch road is: the gas flows to the battery thermal management heat exchanger through the first one-way valve, and returns to the gas-liquid separator after heat exchange of the battery thermal management heat exchanger; the second branch is: the refrigerant at the outlet of the outdoor core body flows to the main expansion valve, at the moment, both the two main expansion valves participate in throttling, after the throttling is finished, the refrigerant directly flows to the indoor core body through the air supplementing intermediate heat exchanger, at the moment, the heat exchanging air supplementing expansion valve is in a closed state, and flows into the gas-liquid separator after heat exchanging through the indoor core body; the refrigerants of the two branches are converged and returned to the compressor;
the heating cycle control method comprises the following steps: the first inlet of the four-way valve is connected with the high-pressure side of the compressor, the second inlet of the four-way valve is connected with the outdoor core body, the first outlet of the four-way valve is connected with the indoor core body, and the second outlet of the four-way valve is connected with the gas-liquid separator; at the moment, after the refrigerant is discharged from the compressor and passes through the indoor core body, the refrigerant output by the indoor core body enters the air supplementing intermediate heat exchanger, and is divided into three paths through the air supplementing intermediate heat exchanger, wherein one path of refrigerant is throttled by the air supplementing expansion valve and then subjected to secondary heat exchange in the air supplementing intermediate heat exchanger, and enters the middle pressure side of the compressor after the secondary heat exchange; the second path flows to the battery thermal management heat exchanger through a second one-way valve, and returns to the gas-liquid separator after heat exchange of the battery thermal management heat exchanger; the third path flows to the main path expansion valve, at the moment, only one main path expansion valve of the main path expansion valve participates in throttling, the throttled refrigerant flows to the outdoor core body, flows into the gas-liquid separator after heat exchange of the outdoor core body, and after the two paths of refrigerants of the gas-liquid separator are converged, the two paths of refrigerants return to the low pressure side of the compressor, and a new cycle is started after the two paths of refrigerants are compressed by the compressor.
Compared with the prior art, the system is integrated with the ultralow temperature air supplementing and enthalpy increasing system and the thermal management system, is suitable for northern cold low-temperature vehicles, has the functions of high-temperature refrigeration, normal-temperature heating, low-temperature heating, defrosting, cooling and heat management of the refrigeration battery, cooling and heat management of the heating battery and the like, and has the advantages of simple structure, easiness in realization and the like.
Drawings
FIG. 1 is a schematic diagram of a refrigeration cycle control of the present invention;
fig. 2 is a schematic diagram of the heating cycle control according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1 and 2, the integrated heat management air conditioning system of the air-supplementing and enthalpy-increasing heat pump for the electric bus comprises a compressor 1, wherein a four-way valve 10 is connected to the high pressure side of the compressor 1, and the four-way valve 10 is respectively connected with the compressor 1, an outdoor core 2, a gas-liquid separator 5 and an indoor core 9; wherein, outdoor core 2 connects two branches, and one of them branch is: the outdoor core body 2 is connected with the battery heat management heat exchanger 4 through the first one-way valve 3, the battery heat management heat exchanger 4 is connected with the inlet side of the gas-liquid separator 5, and the outlet side of the gas-liquid separator 5 is connected with the low pressure side of the compressor 1; the other branch is: the outdoor core body 2 is connected with the main expansion valve 6, the outlet of the main expansion valve 6 is also divided into two paths, and one path is connected with the battery thermal management heat exchanger 4 through the second one-way valve 11; the other path is connected with a chamber core body 9 through a gas supplementing intermediate heat exchanger 7, and the chamber core body 9 is connected with a four-way valve 10;
the first end of the air supplementing intermediate heat exchanger 7 is connected with the medium pressure side of the compressor 1, the second end of the air supplementing intermediate heat exchanger is connected with the main way expansion valve 6 through the heat exchanging air supplementing expansion valve 8, the third end of the air supplementing intermediate heat exchanger is directly connected with the main way expansion valve 6, and the fourth end of the air supplementing intermediate heat exchanger is connected with the inner core body 9; wherein the first end connected with the middle pressure side of the compressor 1 and the second end connected with the heat exchange and air supplementing expansion valve 8 are positioned on the same side of the air supplementing middle heat exchanger 7; the third end connected with the main expansion valve 6 and the fourth end connected with the inner core body 9 are positioned on the same side of the air supplementing intermediate heat exchanger 7.
Further, the main expansion valve is two main expansion valves 6 connected in parallel; during refrigeration, the two main expansion valves 6 are throttling elements and are synchronously controlled; when heating, one main expansion valve 6 is a throttling element, the other main expansion valve 6 is a non-throttling element, and the main expansion valve of the non-throttling element is connected with a third one-way valve 15 (when heating, the other main expansion valve 6 is cut off by the one-way valve, no refrigerant passes through and does not participate in throttling), so that the invention uses the one-way valve control and has the functions of air supplementing and enthalpy increasing.
Further, a bidirectional filter drier 12 is connected to the refrigerant outlet side of the outdoor core 2.
Further, a bidirectional filter 13 is arranged between the air supplementing intermediate heat exchanger 7 and the indoor core 9.
Further, the inlet side of the battery heat management heat exchanger 4 is provided with a heat exchanger expansion valve 14. It should be noted that, the battery thermal management heat exchanger 4 is provided with a waterway inlet and a waterway outlet, the battery thermal management heat exchanger 4 has a cooling thermal management function, and the battery thermal management heat exchanger 4 is in the prior art.
An integrated heat management air conditioner control method of an air supplementing and enthalpy increasing heat pump for an electric bus comprises a refrigeration cycle control method and a heating cycle control method;
the refrigeration cycle control method comprises the following steps: the four-way valve 10 has a first inlet connected to the high pressure side of the compressor 1, a second inlet connected to the inner core 9, a first outlet connected to the outer core 2, and a second outlet connected to the gas-liquid separator 5. At this time, the refrigerant is discharged from the compressor 1, enters the outdoor core 2 through the four-way valve 10, passes through the outdoor core 2, and then is divided into two branches, wherein the first branch is: flows to the battery heat management heat exchanger 4 through the first one-way valve 3, exchanges heat through the battery heat management heat exchanger 4 and returns to the gas-liquid separator 5; the second branch is: the refrigerant at the outlet of the outdoor core body 2 flows to the main expansion valve 6, at the moment, both the main expansion valves 6 participate in throttling, after the throttling is finished, the refrigerant directly flows to the indoor core body 9 through the air supplementing intermediate heat exchanger 7, at the moment, the heat exchanging and air supplementing expansion valve 8 is in a closed state, and the air supplementing intermediate heat exchanger 7 does not participate, so that the heat exchanging effect is not realized, and the refrigerant flows into the gas-liquid separator 5 after heat exchanging through the indoor core body 9; the refrigerants of the two branches are converged and returned to the compressor 1.
The heating cycle control method comprises the following steps: the four-way valve 10 has a first inlet connected to the high pressure side of the compressor 1, a second inlet connected to the outdoor core 2, a first outlet connected to the indoor core 9, and a second outlet connected to the gas-liquid separator 5. At this time, after the refrigerant is discharged from the compressor 1 and passes through the indoor core 9, the refrigerant output by the indoor core 9 enters the air-supplementing intermediate heat exchanger 7, and is divided into three paths through the air-supplementing intermediate heat exchanger 7, one path is throttled by the air-supplementing expansion valve 8 and then subjected to secondary heat exchange in the air-supplementing intermediate heat exchanger 7, and enters the medium pressure side of the compressor 1 after the secondary heat exchange; the second path flows to the battery thermal management heat exchanger 4 through the second one-way valve 11, and returns to the gas-liquid separator 5 after heat exchange of the battery thermal management heat exchanger 4; the third path flows to the main path expansion valve 6, at this time, only one main path expansion valve of the main path expansion valve 6 participates in throttling, the throttled refrigerant flows to the outdoor core 2 (because of the effect of the third one-way valve 15, the refrigerant can only enter the outdoor core 2 through the main path expansion valve with throttling effect in the process), flows into the gas-liquid separator 5 after exchanging heat through the outdoor core 2, and the two paths of refrigerant of the gas-liquid separator 5 are converged and then returned to the low pressure side of the compressor 1, and a new cycle is started after the refrigerant is compressed by the compressor.
The invention adopts the structure of the air-supplementing and enthalpy-increasing integrated heat management system, has the function of low-temperature air-supplementing and enthalpy-increasing heating, and therefore has the functions of high-temperature refrigeration, normal-temperature heating, low-temperature heating, defrosting and the like. The battery thermal management function is integrated, the wide-range accurate adjusting function is achieved, and the refrigerating, heating and low-temperature heating control effects are more accurate, efficient, simpler and more reliable.
Therefore, the invention is suitable for low temperature heat pump air conditioning systems, and can realize the functions of refrigerating, heating, ultralow temperature heating, defrosting, whole vehicle heat management and the like of the air conditioning systems.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several changes and modifications can be made without departing from the general inventive concept, and these should also be regarded as the scope of the invention.

Claims (6)

1. An integrated heat management air conditioning system of an air supplementing and enthalpy increasing heat pump for an electric bus is characterized in that: the air conditioner comprises a compressor (1), wherein a four-way valve (10) is connected to the high-pressure side of the compressor (1), and the four-way valve (10) is respectively connected with the compressor (1), an outdoor core body (2), a gas-liquid separator (5) and an indoor core body (9); wherein, outdoor core (2) connect two branches, and one of them branch road is: the outdoor core body (2) is connected with the battery heat management heat exchanger (4) through the first one-way valve (3), the battery heat management heat exchanger (4) is connected with the inlet side of the gas-liquid separator (5), and the outlet side of the gas-liquid separator (5) is connected with the low-pressure side of the compressor (1); the other branch is: the outdoor core body (2) is connected with the main expansion valve (6), the outlet of the main expansion valve (6) is also divided into two paths, and one path is connected with the battery heat management heat exchanger (4) through the second one-way valve (11); the other path is connected with a chamber inner core body (9) through a gas supplementing intermediate heat exchanger (7), and the chamber inner core body (9) is connected with a four-way valve (10);
the first end of the air supplementing intermediate heat exchanger (7) is connected with the medium pressure side of the compressor (1), the second end of the air supplementing intermediate heat exchanger is connected with the main way expansion valve (6) through the heat exchanging air supplementing expansion valve (8), the third end of the air supplementing intermediate heat exchanger is directly connected with the main way expansion valve (6), and the fourth end of the air supplementing intermediate heat exchanger is connected with the indoor core body (9); the first end connected with the middle pressure side of the compressor (1) and the second end connected with the heat exchange and air supplementing expansion valve (8) are positioned on the same side of the air supplementing middle heat exchanger (7); the third end connected with the main expansion valve (6) and the fourth end connected with the inner core body (9) are positioned on the same side of the air supplementing intermediate heat exchanger (7).
2. The integrated thermal management air conditioning system of an electric bus air-make-up enthalpy-increasing heat pump of claim 1, wherein: the main expansion valve is two main expansion valves (6) which are connected in parallel; during refrigeration, the two main expansion valves (6) are throttling elements and are synchronously controlled; when heating, one main expansion valve (6) is a throttling element, the other main expansion valve (6) is an unthrottled element, and the main expansion valve of the unthrottled element is connected with a third one-way valve (15).
3. The integrated thermal management air conditioning system of an electric bus air-make-up enthalpy-increasing heat pump of claim 1, wherein: the refrigerant outlet side of the outdoor core body (2) is connected with a bidirectional drying filter (12).
4. The integrated thermal management air conditioning system of an electric bus air-make-up enthalpy-increasing heat pump of claim 1, wherein: a bidirectional filter (13) is arranged between the air supplementing intermediate heat exchanger (7) and the inner chamber core body (9).
5. The integrated thermal management air conditioning system of an electric bus air-make-up enthalpy-increasing heat pump of claim 1, wherein: the inlet side of the battery heat management heat exchanger (4) is provided with a heat exchanger expansion valve (14).
6. An integrated heat management air conditioner control method of an air supplementing and enthalpy increasing heat pump for an electric bus comprises a refrigeration cycle control method and a heating cycle control method;
the refrigeration cycle control method comprises the following steps: the first inlet of the four-way valve (10) is connected with the high-pressure side of the compressor (1), the second inlet is connected with the inner chamber core body (9), the first outlet is connected with the outer chamber core body (2), and the second outlet is connected with the gas-liquid separator (5); at this time, refrigerant is discharged from the compressor (1), and then enters the outdoor core body (2) through the four-way valve (10), and after passing through the outdoor core body (2), the refrigerant is divided into two branches, wherein the first branch is as follows: flows to the battery heat management heat exchanger (4) through the first one-way valve (3), exchanges heat through the battery heat management heat exchanger (4), and returns to the gas-liquid separator (5); the second branch is: the refrigerant at the outlet of the outdoor core body (2) flows to the main expansion valve (6), at the moment, the two main expansion valves (6) participate in throttling, after the throttling is finished, the refrigerant directly flows to the indoor core body (9) through the air supplementing intermediate heat exchanger (7), at the moment, the heat exchanging air supplementing expansion valve (8) is in a closed state, and flows into the gas-liquid separator (5) after heat exchanging through the indoor core body (9); the refrigerants of the two branches are converged and then returned to the compressor (1);
the heating cycle control method comprises the following steps: the four-way valve (10) is characterized in that a first inlet is connected with the high-pressure side of the compressor (1), a second inlet is connected with the outdoor core body (2), a first outlet is connected with the indoor core body (9), and a second outlet is connected with the gas-liquid separator (5); at the moment, after being discharged from the compressor (1), the refrigerant passes through the inner chamber body (9), the refrigerant output by the inner chamber body (9) enters the air supplementing intermediate heat exchanger (7), three paths of the refrigerant pass through the air supplementing intermediate heat exchanger (7), one path of the refrigerant is throttled by the air supplementing expansion valve (8) and then undergoes secondary heat exchange in the air supplementing intermediate heat exchanger (7), and the refrigerant enters the medium pressure side of the compressor (1) after the secondary heat exchange; the second path flows to the battery heat management heat exchanger (4) through a second one-way valve (11), and returns to the gas-liquid separator (5) after heat exchange of the battery heat management heat exchanger (4); the third path flows to the main path expansion valve (6), at the moment, only one main path expansion valve of the main path expansion valve (6) participates in throttling, the throttled refrigerant flows to the outdoor core body (2), flows into the gas-liquid separator (5) after heat exchange of the outdoor core body (2), and after the two paths of refrigerants of the gas-liquid separator (5) are converged, the two paths of refrigerants return to the low pressure side of the compressor (1), and a new cycle is started after the two paths of refrigerants are compressed by the compressor.
CN202311241021.8A 2023-09-25 2023-09-25 Air-supplementing enthalpy-increasing heat pump air conditioner integrated heat management system for electric bus Pending CN117698377A (en)

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