CN112984633B - Heat recovery air conditioning system for battery replacement station, control method of heat recovery air conditioning system and battery replacement station - Google Patents

Heat recovery air conditioning system for battery replacement station, control method of heat recovery air conditioning system and battery replacement station Download PDF

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Publication number
CN112984633B
CN112984633B CN202110255817.3A CN202110255817A CN112984633B CN 112984633 B CN112984633 B CN 112984633B CN 202110255817 A CN202110255817 A CN 202110255817A CN 112984633 B CN112984633 B CN 112984633B
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branch
heat exchanger
heat
way valve
conditioning system
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CN202110255817.3A
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CN112984633A (en
Inventor
朱洪磊
张永利
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Shandong Longertek Technology Co Ltd
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Shandong Longertek Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56—Heat recovery units

Abstract

The invention relates to a heat recovery air conditioning system of a power conversion station, a control method thereof and the power conversion station, which comprises a heat exchange circulation main circuit, wherein the heat exchange circulation main circuit comprises a compressor, a four-way valve and a condenser, and a plurality of heat exchangers, a pipeline is arranged in each heat exchanger, two ends of at least one pipeline are respectively connected with at least two branches connected to different positions of the heat exchange circulation main circuit, each branch and the heat exchange circulation main circuit are respectively provided with a control component for controlling the on-off of the pipeline, and the heat exchangers are connected to the heat exchange circulation main circuit in the form of switchable condensers or evaporators through the control components. Through adjusting the control assembly on each branch and the control assembly on the main heat exchange circulation path, the fluid when the heat exchanger refrigerates and the fluid when the heat exchanger heats all pass through the same pipeline, so that the heat exchange area of the heat exchanger is enlarged when the heat exchanger refrigerates or heats, and the heat exchange efficiency of the heat exchanger can be improved. The control method of the heat recovery air-conditioning system of the battery replacement station and the heat recovery air-conditioning system of the battery replacement station are further provided.

Description

Heat recovery air conditioning system for battery replacement station, control method of heat recovery air conditioning system and battery replacement station
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a heat recovery air conditioning system of a battery replacement station, a control method of the heat recovery air conditioning system and the battery replacement station.
Background
At present, with the high-speed increase of the reserve of new energy automobiles in China, the charging and discharging time of automobile storage batteries is long, and the application requirements of automobile owners cannot be met. The battery replacement station is a new industry and begins to develop, when the electric quantity of the storage battery of the new energy automobile is insufficient, a user arrives at the battery replacement station nearby to quickly replace the battery, the replaced storage battery is charged and discharged in the battery replacement station, and the charging and discharging time of the user is saved. When carrying out charge-discharge to the battery, the battery generates heat, is higher than battery normal use temperature after, can shorten battery life greatly, can promote the temperature in the battery compartment simultaneously, and ambient temperature improves the back, also can influence battery life. In order to ensure proper temperature in the battery compartment, an air conditioning system needs to be arranged in the battery compartment, and then an independent liquid cooling system needs to be arranged on the battery pack.
According to the humanized design of present power station, need increase workman's rest room and car owner's tea rest room, if will guarantee that two rooms are warm in winter and cool in summer, need to have two pipelines in the heat exchanger, a pipeline is used for the fluid circulation to realize the refrigeration, and another pipeline is used for the fluid circulation to realize heating, because be equipped with two pipelines in the heat exchanger for the inside space of heat exchanger that every pipeline occupy diminishes relatively, thereby makes the heat exchanger heat transfer area reduce when refrigeration or heating, leads to the heat exchange efficiency of heat exchanger to reduce.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a heat recovery air conditioning system of a battery replacement station, a control method thereof and the battery replacement station, which can recover heat dissipated when a battery pack is charged and discharged and are used for daily heat supply of the battery replacement station in winter.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides a heat recovery air conditioning system of a power conversion station, which comprises a heat exchange circulation main circuit, a plurality of heat exchangers and a plurality of control assemblies, wherein the heat exchange circulation main circuit comprises a compressor, a four-way valve and a condenser, the heat exchangers are internally provided with a pipeline, two ends of at least one pipeline are respectively connected with at least two branches connected to different positions of the heat exchange circulation main circuit, each branch and the heat exchange circulation main circuit are respectively provided with the control assemblies for controlling the on-off of the pipeline, and the heat exchangers are connected to the heat exchange circulation main circuit in the form of switchable condensers or evaporators through the control assemblies.
Furthermore, a first end of the heat exchanger is connected with a first branch and a second branch, and a second end of the heat exchanger is connected with a third branch and a fourth branch;
the first end of the first branch is connected with the second end of the condenser, the second end of the first branch is connected with the first end of the heat exchanger, the first end of the second branch is connected with the second interface of the four-way valve, and the second end of the second branch is connected with the first end of the heat exchanger;
the first end of the third branch is connected with the second end of the heat exchanger, the second end of the third branch is connected with the second end of the condenser, the first end of the fourth branch is connected with the second end of the heat exchanger, and the second end of the fourth branch is connected with the third interface of the four-way valve.
Furthermore, the second end of the second branch is connected to the first branch, and a control component on the first branch is arranged between the first end of the first branch and the second end of the second branch;
the first end of the third branch is connected to the fourth branch, and a control component on the fourth branch is arranged between the first end of the third branch and the second end of the fourth branch.
Furthermore, a first electronic expansion valve is arranged between the first end of the first branch and the second end of the second branch, and a first electromagnetic valve is arranged on the second branch;
a second electronic expansion valve is arranged on the third branch, and a second electromagnetic valve is arranged between the first end of the third branch and the second end of the fourth branch.
Furthermore, the control component on the main heat exchange cycle path comprises a one-way valve and a third electromagnetic valve, the inlet end of the one-way valve is connected with the second interface of the four-way valve, and the outlet end of the one-way valve is connected with the first end of the second branch circuit; the first end of the third electromagnetic valve is communicated with the second interface of the four-way valve, and the second end of the third electromagnetic valve is connected with the first end of the condenser.
Furthermore, a fifth branch and a sixth branch are respectively connected to two ends of at least one heat exchanger, a first end of the fifth branch is connected with a second end of the condenser, a second end of the fifth branch is connected with a first end of the heat exchanger, a first end of the sixth branch is connected with a second end of the heat exchanger, and a second end of the sixth branch is connected with a third interface of the four-way valve; the fifth branch is provided with a third electronic expansion valve.
Furthermore, a fourth electromagnetic valve is arranged on the sixth branch.
The system further comprises a battery pack liquid cooling pipeline and a variable frequency glycol pump, wherein an exhaust port of the compressor is connected with a first interface of the four-way valve, and an air suction port of the variable frequency compressor is connected with a fourth interface of the four-way valve; the third end of heat exchanger is connected to the first end of frequency conversion ethylene glycol pump, and the fourth end of heat exchanger and the first end of battery package liquid cooling pipeline are connected, and the second end of frequency conversion ethylene glycol pump and the second end of battery package liquid cooling pipeline are connected.
The heat recovery air conditioning system of the battery replacement station provided by the technical scheme controls the on-off of a pipeline through the control assembly, and the heat exchanger is switched into the evaporator and communicated with the condenser or switched into the condenser and communicated with the plate heat exchanger.
The invention further provides a power conversion station, and the heat recovery air conditioning system of the power conversion station is provided by adopting the technical scheme.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. through adjusting the control assembly on each branch road and the control assembly on the main heat exchange circulation road, fluid when the heat exchanger refrigerates and fluid when heating all pass through the same pipeline, therefore only need have a pipeline in the heat exchanger, alright realize refrigeration or heating, make the heat exchanger heat transfer area grow when refrigeration or heating, can improve the heat exchange efficiency of heat exchanger.
2. Through adjusting the control assembly on each branch road and the control assembly on the main heat exchange circulation road, the heat exchanger can be switched between the condenser and the evaporator, and the indoor units can be cooled or heated simultaneously or the cooling and the heating are different.
3. The second end of the second branch is connected to the first branch, and the first end of the third branch is connected to the fourth branch, so that the occupation of the pipeline to the space is reduced, and the arrangement of the pipeline is clearer.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention to the proper form disclosed herein. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a flowchart of a heat recovery air conditioning system of a power conversion station according to an embodiment of the present invention;
fig. 2 is a flowchart of a heat recovery air conditioning system of a power conversion station according to another embodiment of the invention.
In the figure: 1-a heat exchange cycle main path; 11-a compressor; 12-a four-way valve; 13-a condenser; 2-a first heat exchanger; 21-a first branch; 211-a first electronic expansion valve; 22-a second branch; 221-a first solenoid valve; 23-a third branch; 231-a second electronic expansion valve; 24-a fourth branch; 241-a second solenoid valve; 25-a one-way valve; 26-a third solenoid valve; 3-a second heat exchanger; 31-fifth branch; 311-a third electronic expansion valve; 32-sixth branch; 321-a fourth electromagnetic valve; 4-liquid cooling pipeline of battery pack; 5-variable frequency ethylene glycol pump.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Examples
As shown in fig. 1 and 2, the invention provides a heat recovery air conditioning system for a power conversion station, which comprises a heat exchange cycle main circuit 1, wherein the heat exchange cycle main circuit 1 comprises a compressor 11, a four-way valve 12 and a condenser 13, and further comprises a plurality of heat exchangers, each heat exchanger is internally provided with a pipeline, two ends of at least one pipeline are respectively connected with at least two branches connected to different positions of the heat exchange cycle main circuit 1, each branch and the heat exchange cycle main circuit 1 are respectively provided with a control component for controlling the on-off of the pipeline, and the heat exchangers are connected to the heat exchange cycle main circuit 1 in the form of switchable condensers 13 or evaporators through the control components.
In the embodiment of the invention, the control components on the branches and the control component on the main heat exchange cycle path 1 are adjusted, so that the fluid in the heat exchanger during refrigeration and the fluid in the heat exchanger during heating both pass through the same pipeline, and therefore, only one pipeline is needed in the heat exchanger to realize refrigeration or heating, the heat exchange area of the heat exchanger during refrigeration or heating is enlarged, and the heat exchange efficiency of the heat exchanger can be improved; the heat recovery air conditioning system of the battery replacement station is used for the battery replacement station.
The heat exchanger can be used as a first heat exchanger 2, and the first heat exchanger 2 is used for refrigerating or heating a worker rest room and a customer tea rest room; wherein, the broken line boxes in fig. 2 are a worker rest room and a customer tea rest room from left to right in sequence; by adjusting the control assembly, simultaneous refrigeration and heating of a worker rest room and a client tea rest room can be realized or the refrigeration and heating of the worker rest room and the client tea rest room are different; the first heat exchanger 2 is switched between both the condenser and the evaporator by controlling the opening and closing of the assembly.
As shown in fig. 1 and 2, in the embodiment of the present invention, a first branch 21 and a second branch 22 are connected to a first end of the heat exchanger, and a third branch 23 and a fourth branch 24 are connected to a second end of the heat exchanger;
the first end of the first branch 21 is connected with the second end of the condenser 13, the second end of the first branch 21 is connected with the first end of the heat exchanger, the first end of the second branch 22 is connected with the second interface of the four-way valve 12, and the second end of the second branch 22 is connected with the first end of the heat exchanger;
the first end of the third branch 23 is connected with the second end of the heat exchanger, the second end of the third branch 23 is connected with the second end of the condenser 13, the first end of the fourth branch 24 is connected with the second end of the heat exchanger, and the second end of the fourth branch 24 is connected with the third interface of the four-way valve 12.
In the embodiment of the present invention, the four-way valve 12 has four interfaces, including a first interface, a second interface, a third interface and a fourth interface, and the four-way valve 12 has a first working mode and a second working mode through different connection modes between the four interfaces, when the four-way valve 12 is in the first working mode, the first interface and the second interface of the four-way valve 12 are communicated, and the third interface and the fourth interface of the four-way valve 12 are communicated; when the four-way valve 12 is in the second working mode, the first interface and the third interface of the four-way valve 12 are communicated, and the second interface and the fourth interface of the four-way valve 12 are communicated;
when the four-way valve 12 is in the first working mode, the refrigerant from the compressor 11 flows out from the first interface and the second interface of the four-way valve, and the refrigerant after completing the cooling and heating flows back to the compressor from the third interface and the fourth interface of the four-way valve; the refrigerant flowing out of the first interface and the second interface of the four-way valve 12 can enter the condenser 12, then enter the first heat exchanger 2 through the first branch 21, and also directly enter the first heat exchanger 2 through the second branch 22; the refrigerant flowing out of the first heat exchanger 2 can flow out of the third branch 23 and the fourth branch 24, and finally flows back to the compressor 11 from the third port and the fourth port of the four-way valve 12;
when the four-way valve 12 is in the second working mode, the refrigerant from the compressor 11 flows out from the first interface and the third interface of the four-way valve 12, and the refrigerant after completing cooling and heating flows back to the compressor 11 from the second interface and the fourth interface of the four-way valve 12; the refrigerant flowing out of the first port and the third port of the four-way valve 12 can enter the first heat exchanger 2 through the fourth branch 24, and the refrigerant flowing out of the first heat exchanger 2 can flow out of the first branch 21 and finally flow back to the compressor 11 through the second port and the fourth port of the four-way valve 12.
As shown in fig. 1 and fig. 2, in the embodiment of the present invention, the second end of the second branch 22 is connected to the first branch 21, and a control component on the first branch 21 is disposed between the first end of the first branch 21 and the second end of the second branch 22;
the first end of the third branch 23 is connected to the fourth branch 24, and a control component on the fourth branch 24 is arranged between the first end of the third branch 23 and the second end of the fourth branch 24.
In the embodiment of the present invention, the second end of the second branch 22 is integrated on the first branch 21, and the first end of the third branch 23 is integrated on the fourth branch 24, so as to reduce the space occupation of the pipeline and make the arrangement of the pipeline clearer;
specifically, a first electronic expansion valve 211 is arranged between a first end of the first branch 21 and a second end of the second branch 22, the first electronic expansion valve 211 controls on-off of the first branch, a first electromagnetic valve 221 is arranged on the second branch 22, and the first electromagnetic valve 221 controls on-off of the second branch; a second electronic expansion valve 231 is arranged on the third branch 23, the second electronic expansion valve 231 controls the on-off of the third branch, a second electromagnetic valve 241 is arranged between the first end of the third branch 23 and the second end of the fourth branch 24, and the second electromagnetic valve 241 controls the on-off of the fourth branch 24.
The electronic expansion valve is in an automatic working mode, and the on-off and opening values of the electronic expansion valve are judged according to the actual refrigerating and heating working conditions. As shown in fig. 1 and fig. 2, in the embodiment of the present invention, the control component on the main heat exchange cycle 1 includes a check valve 25 and a third solenoid valve 26, an inlet end of the check valve 25 is connected to the second interface of the four-way valve 12, and an outlet end of the check valve 25 is connected to the first end of the second branch 22; a first end of the third solenoid valve 26 is communicated with a second port of the four-way valve 12, and a second end of the third solenoid valve 26 is connected with a first end of the condenser 13.
In the embodiment of the present invention, the check valve 25 controls whether the refrigerant flowing out of the first port and the third port of the four-way valve 12 can enter the first branch 21, when the check valve 25 is opened, the refrigerant flowing out of the first port and the third port of the four-way valve 12 can enter the first branch 21, and when the check valve 25 is closed, the refrigerant flowing out of the first port and the third port of the four-way valve 12 cannot enter the first branch 21;
the third solenoid valve 26 controls whether or not the refrigerant flowing out of the first port and the third port of the four-way valve 12 can enter the condenser 13, when the third solenoid valve 26 is opened, the refrigerant flowing out of the first port and the third port of the four-way valve 12 can enter the condenser 13, and when the check valve 25 is closed, the refrigerant flowing out of the first port and the third port of the four-way valve 12 cannot enter the condenser 13.
As shown in fig. 2, in the embodiment of the present invention, two ends of at least one heat exchanger are respectively connected to a fifth branch 31 and a sixth branch 32, a first end of the fifth branch 31 is connected to a second end of the condenser 13, a second end of the fifth branch 31 is connected to a first end of the heat exchanger, a first end of the sixth branch 32 is connected to a second end of the heat exchanger, and a second end of the sixth branch 32 is connected to a third interface of the four-way valve 12; a third electronic expansion valve 311 is provided in the fifth branch 31.
In the embodiment of the invention, the heat exchanger is used as a second heat exchanger 3, and the second heat exchanger 3 can refrigerate or heat the battery compartment;
the refrigerant flowing out of the first interface and the second interface of the four-way valve 12 can enter the condenser 13 and then enter the second heat exchanger 3 through the fifth branch 31; the refrigerant coming out of the second heat exchanger 3 can flow out of the sixth branch 32 and finally flows back to the compressor 11 from the third and fourth ports of the four-way valve 12;
the refrigerant flowing out of the first port and the third port of the four-way valve 12 can enter the second heat exchanger 3 through the sixth branch 32, and the refrigerant flowing out of the second heat exchanger 3 can flow into the condenser 13 and finally flow back to the compressor 11 through the second port and the fourth port of the four-way valve 12.
Wherein, the leftmost dotted line box in fig. 2 is a battery compartment, so that the dotted line boxes in fig. 2 are a battery compartment, a worker rest room and a customer tea rest room in sequence from left to right;
when the battery pack is charged and discharged in summer, the battery pack emits heat, the temperature in rooms is overhigh, all the rooms need to be refrigerated at the moment, and the system starts working modes of battery pack refrigeration, battery compartment refrigeration, worker rest room refrigeration and customer tea rest room refrigeration; when the battery pack charges and discharges in winter, the battery pack emits heat, if the number of the battery packs charged and discharged simultaneously is large, the temperature in the battery compartment rises, and at the moment, the battery pack and the battery compartment need to be cooled simultaneously. If the temperatures of the worker rest room and the client tea rest room are lower, heating can be simultaneously carried out, and at the moment, the system starts the working modes of battery pack refrigeration, battery bin refrigeration, worker rest room heating and client tea rest room heating; in spring or autumn, because ambient temperature is suitable, battery compartment, workman's rest room and customer's tea rest room need not refrigerate or heat, and only battery package need refrigerate this moment. After the battery pack is charged and discharged in winter, the temperature in the battery pack and the temperature in the battery bin need to be maintained, meanwhile, a worker rest room and a customer tea rest room need to be heated, and at the moment, the system starts working modes of battery pack heating, battery bin heating, worker rest room heating and customer tea rest room heating; when the battery pack is charged and discharged in winter, the battery pack needs to be refrigerated, if the number of the battery packs charged and discharged simultaneously is small, the battery bin, the worker rest room and the customer tea rest room need to be heated, and at the moment, the system starts working modes of battery pack refrigeration, battery bin heating, worker rest room heating and customer tea rest room heating.
As shown in fig. 2, in the embodiment of the present invention, a fourth solenoid valve 321 is disposed on the sixth branch 32; the fourth solenoid valve 321 is used for controlling on/off of the sixth branch 32.
As shown in fig. 2, in the embodiment of the present invention, the battery pack liquid cooling pipeline 4 and the variable frequency glycol pump 5 are further included, an exhaust port of the compressor 11 is connected to a first interface of the four-way valve 12, and an air suction port of the variable frequency compressor 11 is connected to a fourth interface of the four-way valve 12; the third end of heat exchanger is connected to the first end of frequency conversion ethylene glycol pump 5, and the fourth end of heat exchanger and the first end of battery package liquid cooling pipeline 4 are connected, and the second end of frequency conversion ethylene glycol pump 5 and the second end of battery package liquid cooling pipeline 4 are connected.
In the embodiment of the invention, the heat exchanger is a second heat exchanger 3, wherein the second heat exchanger 3 can be a plate heat exchanger which is used for absorbing heat emitted by a battery pack during charging and discharging and reducing the temperature of the battery pack during charging and discharging; or the temperature control device is used for heating the battery pack which is kept standing when the environmental temperature is lower in winter, and maintaining the temperature of the battery pack;
specifically, one of them second heat exchanger 3 is plate heat exchanger, and this plate heat exchanger's third end is connected to the first end of frequency conversion ethylene glycol pump 5, and the fourth end of heat exchanger and the first end of battery package liquid cooling pipeline 4 are connected.
The working modes of the plurality of first heat exchangers 2 and the plurality of second heat exchangers 3 are controlled by controlling the opening and closing states of the first electromagnetic valve 221, the second electromagnetic valve 241, the third electromagnetic valve 26, the fourth electromagnetic valve 321, the first electronic expansion valve 211, the second electronic expansion valve 231 and the third electronic expansion valve 311, so that a plurality of refrigerating or heating loops are formed, and the purpose of refrigerating or heating a target space is achieved. The heat that generates heat when filling and discharging with the battery package is retrieved for trade the daily heat supply of power station control chamber and rest room in winter, reached the effect of heat recovery, solved the problem of trading the high energy consumption of power station air conditioning system simultaneously.
As shown in fig. 2, when the battery pack is charged and discharged in summer, the battery pack emits heat, the temperature in the room is too high, all rooms need to be refrigerated at the moment, and the system starts working modes of battery pack refrigeration, battery compartment refrigeration, worker rest room refrigeration and customer tea rest room refrigeration at the moment; the specific operating mode is as follows: closing the check valve 25, closing the two first solenoid valves 221, and opening the two second solenoid valves 241, the third solenoid valve 26, and the fourth solenoid valve 321; two first electronic expansion valves 211 and two third electronic expansion valves 311 are opened, and two second electronic expansion valves 231 are closed; after the four-way valve 12 is switched to the first working mode, and the air conditioning system of the power station starts working, the refrigerant is discharged from the exhaust port of the compressor 11, enters the first interface of the four-way valve 12 along the pipeline, passes through the four-way valve 12 and flows out of the second interface of the four-way valve 12, and then passes through the third electromagnetic valve 26 to reach the condenser 13 for heat exchange. Then, a part of the refrigerant reaches the second heat exchanger 3 in the battery compartment through the third electronic expansion valve 311 along the pipeline, and starts to absorb heat for refrigeration to cool the battery compartment; a part of the refrigerant reaches the first heat exchanger 2 in the worker's rest room through the first electronic expansion valve 211 along the pipeline, starts heat absorption and refrigeration, and reduces the temperature in the worker's rest room; a part of the refrigerant reaches the first heat exchanger 2 in the customer tea chamber through the first electronic expansion valve 211 along the pipeline, and the heat absorption and refrigeration are started; a part of the refrigerant reaches the plate heat exchanger through the third electronic expansion valve 311 along the pipeline, absorbs the heat energy dissipated during the charging and discharging of the battery pack, and starts the refrigeration operation. Finally, all the refrigerant enters the third interface of the four-way valve 12, passes through the four-way valve 12 and flows out of the fourth interface of the four-way valve 12, and enters the suction port of the variable frequency compressor 11 along a pipeline to complete a cycle.
When the battery pack charges and discharges in winter, the battery pack emits heat, if the number of the battery packs charged and discharged simultaneously is large, the temperature in the battery compartment rises, and at the moment, the battery pack and the battery compartment need to be cooled simultaneously. If the temperatures of the worker rest room and the client tea rest room are lower, heating can be simultaneously carried out, and at the moment, the system starts working modes of battery pack refrigeration, battery bin refrigeration, worker rest room heating and client tea rest room heating; the specific operating mode is as follows: opening the check valve 25, the two first solenoid valves 221, the third solenoid valve 26, and the two fourth solenoid valves 321, closing the two second solenoid valves 241, opening the second electronic expansion valve 231, the two third electronic expansion valves 311, and closing the two first electronic expansion valves 211; after the four-way valve 12 is switched to the first working mode and the air conditioning system of the power station starts working, the refrigerant is discharged from the exhaust port of the compressor 11, enters the first interface of the four-way valve 12 along the pipeline, passes through the four-way valve 12 and flows out of the second interface of the four-way valve 12. A portion of the refrigerant enters the condenser 13 through the third solenoid valve 26 and the remainder of the refrigerant follows a line to the check valve 25. A part of the refrigerant flowing out of the one-way valve 25 enters the first heat exchanger 2 in the rest room of the worker through the first electromagnetic valve 221, and heat release is started, so that the purpose of heating the rest room of the worker is achieved; another part of the refrigerant flowing out of the one-way valve 25 enters the first heat exchanger 2 in the customer tea chamber through the first electromagnetic valve 221, and heat release is started to improve the temperature in the customer tea chamber; the refrigerant flowing out of the first heat exchanger 2 in the artificial rest room flows through the second electronic expansion valve 231, the refrigerant flowing out of the first heat exchanger 2 in the customer tea rest room flows through the second electronic expansion valve 231, the refrigerants flowing out of the two second electronic expansion valves 231 are converged, enter the plate heat exchanger through the third electronic expansion valve 311 to absorb heat, and the refrigerant flows out of the plate heat exchanger; a part of the refrigerant passing through the condenser 13 enters the second heat exchanger 3 in the battery compartment through the third electronic expansion valve 311 to cool the battery compartment; the other part of the refrigerant passing through the condenser 13 enters the plate heat exchanger through the third electronic expansion valve 311, absorbs the heat dissipated during the charging and discharging of the battery, and refrigerates the battery pack. All the refrigerants flowing out of the plate heat exchanger and the refrigerants flowing out of the second heat exchanger 3 in the battery compartment are converged, enter from the third interface of the four-way valve 12, flow out from the fourth interface of the four-way valve 12 after passing through the four-way valve 12, and enter the suction port of the variable frequency compressor 11 along the pipeline to complete the sequential circulation.
In spring or autumn, because ambient temperature is suitable, battery compartment, workman's rest room and customer's tea rest room need not refrigerate or heat, and only battery package need refrigerate this moment. After the battery pack is charged and discharged in winter, the temperature in the battery pack and the temperature in the battery bin need to be maintained, meanwhile, the worker rest room and the customer tea rest room need to be heated, and at the moment, the system starts working modes of battery pack heating, battery bin heating, worker rest room heating and customer tea rest room heating. When the battery pack is charged and discharged in winter, the battery pack needs to be refrigerated, if the number of the battery packs charged and discharged simultaneously is small, the battery bin, the worker rest room and the customer tea rest room need to be heated, and at the moment, the system starts working modes of battery pack refrigeration, battery bin heating, worker rest room heating and customer tea rest room heating. For the above operation mode, the above operation mode can be realized by adjusting the opening or closing of each valve, that is, the first heat exchanger 2 and the second heat exchanger 3 can be switched between the evaporator and the condenser 13 by adjusting the opening or closing of each valve.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention in any way, and although the present invention has been disclosed by the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications to the equivalent embodiments by using the technical contents disclosed above without departing from the technical scope of the present invention, and the embodiments in the above embodiments can be further combined or replaced, but any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims (7)

1. A heat recovery air conditioning system of a battery replacement station comprises a heat exchange circulation main circuit, wherein the heat exchange circulation main circuit comprises a compressor, a four-way valve and a condenser and is characterized by further comprising a plurality of heat exchangers, a pipeline is arranged in each heat exchanger, two ends of at least one pipeline are respectively connected with at least two branches connected to different positions of the heat exchange circulation main circuit, each branch and the heat exchange circulation main circuit are respectively provided with a control assembly for controlling the on-off of the pipeline, and the heat exchangers are connected to the heat exchange circulation main circuit in the form of switchable condensers or evaporators through the control assemblies;
the first end of the heat exchanger is connected with a first branch and a second branch, and the second end of the heat exchanger is connected with a third branch and a fourth branch;
the first end of the first branch is connected with the second end of the condenser, the second end of the first branch is connected with the first end of the heat exchanger, the first end of the second branch is connected with the second interface of the four-way valve, and the second end of the second branch is connected with the first end of the heat exchanger;
the first end of the third branch is connected with the second end of the heat exchanger, the second end of the third branch is connected with the second end of the condenser, the first end of the fourth branch is connected with the second end of the heat exchanger, and the second end of the fourth branch is connected with a third interface of the four-way valve; the heat exchanger can be used as a first heat exchanger for refrigerating or heating a worker rest room and a customer tea rest room;
the two ends of at least one heat exchanger are respectively connected with a fifth branch and a sixth branch, the first end of the fifth branch is connected with the second end of the condenser, the second end of the fifth branch is connected with the first end of the heat exchanger, the first end of the sixth branch is connected with the second end of the heat exchanger, and the second end of the sixth branch is connected with a third interface of the four-way valve; a third electronic expansion valve is arranged on the fifth branch; the heat exchanger is used as a second heat exchanger which can refrigerate or heat the battery compartment;
the system also comprises a battery pack liquid cooling pipeline and a variable frequency glycol pump, wherein an exhaust port of the compressor is connected with a first interface of the four-way valve, and an air suction port of the variable frequency compressor is connected with a fourth interface of the four-way valve; the third end of heat exchanger is connected to the first end of frequency conversion ethylene glycol pump, and the fourth end of heat exchanger and the first end of battery package liquid cooling pipeline are connected, and the second end of frequency conversion ethylene glycol pump and the second end of battery package liquid cooling pipeline are connected.
2. The swapping station heat recovery air conditioning system of claim 1, wherein the second end of the second branch is connected to the first branch, and a control component on the first branch is arranged between the first end of the first branch and the second end of the second branch;
the first end of the third branch is connected to the fourth branch, and a control assembly on the fourth branch is arranged between the first end of the third branch and the second end of the fourth branch.
3. The swapping station heat recovery air conditioning system of claim 2, wherein a first electronic expansion valve is arranged between the first end of the first branch and the second end of the second branch, and a first solenoid valve is arranged on the second branch;
a second electronic expansion valve is arranged on the third branch, and a second electromagnetic valve is arranged between the first end of the third branch and the second end of the fourth branch.
4. The battery changing station heat recovery air conditioning system according to any one of claims 1 to 3, wherein the control component on the main heat exchange cycle path comprises a one-way valve and a third solenoid valve, an inlet end of the one-way valve is connected with a second interface of the four-way valve, and an outlet end of the one-way valve is connected with a first end of the second branch; the first end of the third electromagnetic valve is communicated with the second interface of the four-way valve, and the second end of the third electromagnetic valve is connected with the first end of the condenser.
5. The swapping station heat recovery air conditioning system of claim 4, wherein a fourth solenoid valve is disposed on the sixth branch.
6. A power conversion station is characterized in that the heat recovery air conditioning system of any one of claims 1-5 is adopted.
7. A switching station heat recovery air conditioning system control method is applied to the switching station heat recovery air conditioning system as claimed in any one of claims 1 to 5, and is characterized in that a control assembly is used for controlling on-off of a pipeline, and a heat exchanger is switched into an evaporator and communicated with a condenser or is switched into a condenser and communicated with a plate heat exchanger.
CN202110255817.3A 2021-03-09 2021-03-09 Heat recovery air conditioning system for battery replacement station, control method of heat recovery air conditioning system and battery replacement station Active CN112984633B (en)

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CN102109210B (en) * 2009-12-28 2013-06-26 三洋电机株式会社 Air conditioning system
CN101806518A (en) * 2010-03-30 2010-08-18 德华科电器科技(安徽)有限公司 Integrated heat source switchable heat pump circulatory system
CN101865555B (en) * 2010-06-29 2012-10-03 广东志高空调有限公司 Multi-split air-conditioner capable of simultaneously refrigerating and heating
CN112344575B (en) * 2020-11-24 2024-01-30 山东朗进科技股份有限公司 Heat recovery air conditioning system of power exchange station, control method of heat recovery air conditioning system and power exchange station

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