CN117515941A - Refrigerating system - Google Patents

Refrigerating system Download PDF

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Publication number
CN117515941A
CN117515941A CN202410010367.5A CN202410010367A CN117515941A CN 117515941 A CN117515941 A CN 117515941A CN 202410010367 A CN202410010367 A CN 202410010367A CN 117515941 A CN117515941 A CN 117515941A
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CN
China
Prior art keywords
port
branch
vortex tube
communicated
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202410010367.5A
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Chinese (zh)
Other versions
CN117515941B (en
Inventor
古小红
黄家峰
刘帅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Zhuhai Gree Intelligent Equipment Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Zhuhai Gree Intelligent Equipment Co Ltd
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Priority to CN202410010367.5A priority Critical patent/CN117515941B/en
Publication of CN117515941A publication Critical patent/CN117515941A/en
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Publication of CN117515941B publication Critical patent/CN117515941B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
    • F25B9/04—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect using vortex effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002—Generators
    • 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]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The present invention provides a refrigeration system, comprising: the system comprises a compressor, a first heat exchanger, a vortex tube, a thermoelectric generation device, an electronic expansion valve, a second heat exchanger, a storage battery, a third heat exchanger and a fourth heat exchanger. According to the invention, the vortex tube, the thermoelectric generation device and the pipeline are arranged, the coupling characteristic of the vortex tube and the refrigerant and the semiconductor thermoelectric generation are utilized, and the seebeck effect is utilized, so that the thermoelectric generation sheet is positioned between the low-temperature refrigerant from the cold end of the vortex tube and the high-temperature refrigerant from the condenser, and the thermoelectric generation is realized.

Description

Refrigerating system
Technical Field
The invention relates to the technical field of refrigeration systems, in particular to a refrigeration system.
Background
The refrigeration system is widely applied to various scenes such as home, automobiles, ice bank refrigeration and the like as an indispensable part of the modern society.
However, the existing refrigeration system only focuses on the refrigeration effect, but does not focus on the energy consumption problem, and a large amount of electric energy consumed by the refrigeration system in the refrigeration process definitely increases a large amount of refrigeration cost.
Disclosure of Invention
The present application is based on the discovery and recognition by the inventors of the following problems and facts: the existing refrigeration system has high power consumption and lacks of electric energy recovery, so that the refrigeration cost is high.
The present invention aims to solve at least to some extent one of the above technical problems.
According to a first aspect of the present disclosure, there is provided a refrigeration system comprising: the system comprises a compressor, a first heat exchanger, a vortex tube, a thermoelectric generation device, an electronic expansion valve, a second heat exchanger, a storage battery, a third heat exchanger and a fourth heat exchanger;
the thermoelectric generation device is provided with a passage L1, a passage L2 and a power generation end, the passage L1 and the passage L2 can exchange heat, the passage L1 is provided with a thermoelectric generation device A port and a thermoelectric generation device B port, the passage L2 is provided with a thermoelectric generation device C and a thermoelectric generation device D port, and the power generation end is electrically connected with the storage battery, so that the voltage generated by the thermoelectric generation device can be stored through the storage battery;
the vortex tube is provided with a vortex tube inlet, a vortex tube cold end outlet and a vortex tube hot end outlet;
the exhaust port of the compressor is communicated with one end of a first branch, the other end of the first branch is communicated with a first port of the first heat exchanger, a second port of the first heat exchanger is communicated with one end of an eleventh branch, the other end of the eleventh branch is communicated with an A port of the thermoelectric generation device, an B port of the thermoelectric generation device is communicated with one end of a second branch, the other end of the second branch is communicated with a first port of the electronic expansion valve, a second port of the electronic expansion valve is communicated with one end of a tenth branch, the other end of the tenth branch is communicated with a first port of the fourth heat exchanger, a second port of the fourth heat exchanger is communicated with one end of a third branch, and the other end of the third branch is communicated with the air suction port of the compressor;
the first branch is further communicated with one end of a fourth branch between the exhaust port of the compressor and the first port of the first heat exchanger, the other end of the fourth branch is communicated with the inlet of the vortex tube, the cold end outlet of the vortex tube is communicated with one end of a fifth branch, the other end of the fifth branch is communicated with the D port of the thermoelectric generation device, the C port of the thermoelectric generation device is communicated with one end of a sixth branch, the other end of the sixth branch is communicated with the first port of the second heat exchanger, the second port of the second heat exchanger is communicated with one end of a seventh branch, and the other end of the seventh branch is communicated with the third branch;
the hot end outlet of the vortex tube is communicated with one end of an eighth branch, the other end of the eighth branch is communicated with the first port of the third heat exchanger, the second port of the third heat exchanger is communicated with one end of a ninth branch, and the other end of the ninth branch is communicated with the second branch.
In some embodiments, the refrigeration system further comprises: a subcooler;
the subcooler is provided with a passage L3 and a passage L4, heat exchange can be carried out between the passage L3 and the passage L4, the passage L3 is provided with a subcooler A port and a subcooler B port, and the passage L4 is provided with a subcooler C port and a subcooler D port;
the passage L3 is communicated in the second branch and is positioned at one side of the second branch, which is far away from the electronic expansion valve, relative to the communication point between the ninth branch and the second branch, the opening of the subcooler A is close to the opening of the thermoelectric generation device B, and the opening of the subcooler B is close to the communication point between the ninth branch and the second branch;
the passage L4 is communicated in a sixth branch, the C port of the subcooler is close to the first port of the second heat exchanger, and the D port of the subcooler is close to the C port of the thermoelectric generation device.
In some embodiments, the refrigeration system further comprises: a superheater;
the superheater is provided with a passage L5 and a passage 6, heat exchange can be carried out between the passage L5 and the passage L6, the passage L3 is provided with a superheater A port and a superheater B port, and the passage L4 is provided with a superheater C port and a superheater D port;
the eighth branch is also communicated with a first bypass, the passage L5 is communicated in the first bypass, the port A of the superheater is close to the hot end outlet of the vortex tube, and the port B of the superheater is close to the first port of the third heat exchanger;
the passage L6 is communicated in the third branch, the port C of the superheater is close to the second port of the fourth heat exchanger, and the port D of the superheater is close to the air suction port of the compressor 1;
wherein the first bypass is further provided with a superheater valve between the superheater a port and the eighth bypass.
In some embodiments, a vortex tube inlet control valve is provided in the fourth leg, a vortex tube cold end outlet pressure control valve is provided in the fifth leg, and a vortex tube hot end outlet control valve is provided in the eighth leg.
In some embodiments, a first flow regulating valve is arranged in the fifth branch, two ends of the first flow regulating valve are communicated with a second bypass, and a third flow regulating valve is arranged in the second bypass;
wherein the first flow regulating valve and the third flow regulating valve form a vortex tube cold end outlet pressure control valve.
In some embodiments, the eighth branch is provided with a second flow regulating valve, and is communicated with a third bypass at two ends of the second flow regulating valve, and a fourth flow regulating valve is arranged in the third bypass;
and the second flow regulating valve and the fourth flow regulating valve form a vortex tube hot end outlet pressure control valve.
In some embodiments, the refrigeration system further comprises: a gas-liquid separator;
the gas-liquid separator is arranged in the third branch, the inlet of the gas-liquid separator is communicated with the second port of the fourth heat exchanger, and the outlet of the gas-liquid separator is communicated with the air suction port of the compressor.
In some embodiments, the refrigeration system further comprises:
a controller capable of changing an operating mode of the refrigeration system based on a user demand.
In some embodiments, the operating mode includes:
a normal refrigeration mode in which the vortex tube inlet control valve is closed;
in a high-temperature refrigeration non-power generation mode, an inlet valve of the vortex tube is opened, a control valve of a cold end outlet of the vortex tube is closed, a control valve of a hot end outlet of the vortex tube is completely opened, and a superheater valve is closed;
in the high-temperature refrigeration power generation mode, the inlet valve of the vortex tube is opened, the outlet control valve of the cold end of the vortex tube is opened, the outlet control valve of the hot end of the vortex tube is completely opened, and the superheater valve is closed.
In some embodiments, the operating mode further comprises:
the low-frequency power generation mode is characterized in that an inlet valve of the vortex tube is opened in the low-frequency power generation mode, an outlet valve of the cold end of the vortex tube is opened, an outlet control valve of the hot end of the vortex tube is opened, and a superheater valve is opened;
in the efficient power generation mode, the inlet valve of the vortex tube is opened to enable the inlet pressure of the vortex tube to be adjusted to be maximum, and the control valve of the cold end outlet of the vortex tube is opened to enable the cold flow ratio mu of the cold end outlet of the vortex tube to reach a preset value, wherein the cold flow ratio mu is the ratio of the mass flow of the cold end outlet of the vortex tube to the mass flow of the inlet of the vortex tube.
In some embodiments, the second heat exchanger is disposed at the device to be cooled;
preferably, the device to be cooled is the compressor.
According to the refrigerating system provided by the embodiment of the invention, the vortex tube, the thermoelectric generation device and the pipeline are arranged, the coupling characteristic of the vortex tube and the refrigerant and the semiconductor thermoelectric generation are utilized, the seebeck effect is utilized, the thermoelectric generation piece is positioned between the low-temperature refrigerant from the cold end of the vortex tube and the high-temperature refrigerant from the condenser, so that the thermoelectric generation is realized, particularly, the refrigerant with the temperature difference is provided for the thermoelectric generation device through the vortex tube, the thermoelectric generation device can generate electric energy while refrigerating the refrigerating system, the electric energy is stored through the storage battery, the part of electric energy of the refrigerating system can be recovered, the recovered electric energy is stored in the storage battery, and the storage battery can provide sustainable power for indoor emergency lighting or a control panel of a refrigerating system unit.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic diagram of a structure according to an embodiment of the present invention.
Reference numerals
1. A compressor; 2. a first heat exchanger; 2-1, a fourth heat exchanger; 2-2, a second heat exchanger; 2-3, a third heat exchanger; 3. an electronic expansion valve; 4. a first fan; 4-1, a second fan; 5. a vortex tube; 5-1, a cold end outlet of the vortex tube; 5-2, vortex tube inlet; 5-3, a hot end outlet of the vortex tube; 6. a gas-liquid separator; 7. a thermoelectric power generation device; 7-1, a hot end of the power generation device; 7-2, thermoelectric generation sheets; 7-3, a cold end of the power generation device; 8. a subcooler; 9. a superheater; 10. a storage battery; 1', vortex tube inlet control valve; 2' a first flow regulating valve; 2' -1, a third flow regulating valve; a 3' second flow regulating valve; 3' -1, a fourth flow regulating valve; 4' superheater valve.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Throughout the specification and claims, the following terms have at least the meanings explicitly associated herein, unless the context dictates otherwise. The meanings identified below are not necessarily limiting terms, but merely provide illustrative examples of terms.
In the description of the present invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may. Similarly, the phrase "in some embodiments" as used herein, when used multiple times, does not necessarily refer to the same embodiment, although it may. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and/or" unless the context clearly dictates otherwise. The term "based on" is not exclusive and allows for being based on additional factors not described, unless the context clearly dictates otherwise. The term "exemplary" is used herein to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The scope of the invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but merely set forth some of the many possible embodiments of the claimed invention. The various embodiments provided by the present invention should not be construed as limiting the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying 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.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
As shown in fig. 1, a refrigeration system according to an embodiment of the present invention includes: the system comprises a compressor 1, a first heat exchanger 2, a vortex tube 5, a thermoelectric generation device 7, an electronic expansion valve 3, a second heat exchanger 2-2, a storage battery 10, a third heat exchanger 2-3 and a fourth heat exchanger 2-1;
the thermoelectric generation device 7 is provided with a passage L1, a passage L2 and a power generation end, heat exchange can be carried out between the passage L1 and the passage L2, the passage L1 is provided with a thermoelectric generation device 7A port and a thermoelectric generation device 7B port, the passage L2 is provided with a thermoelectric generation device 7C port and a thermoelectric generation device 7D port, and the power generation end is electrically connected with the storage battery 10;
the vortex tube 5 is provided with a vortex tube 5 inlet, a vortex tube 5 cold end outlet and a vortex tube 5 hot end outlet;
the exhaust port of the compressor 1 is communicated with one end of a first branch, the other end of the first branch is communicated with the first port of the first heat exchanger 2, the second port of the first heat exchanger 2 is communicated with one end of an eleventh branch, the other end of the eleventh branch is communicated with the port of the thermoelectric generation device 7A, the port of the thermoelectric generation device 7B is communicated with one end of the second branch, the other end of the second branch is communicated with the first port of the electronic expansion valve 3, the second port of the electronic expansion valve 3 is communicated with one end of a tenth branch, the other end of the tenth branch is communicated with the first port of the fourth heat exchanger 2-1, the second port of the fourth heat exchanger 2-1 is communicated with one end of a third branch, and the other end of the third branch is communicated with the air suction port of the compressor 1;
the first branch is also communicated with one end of a fourth branch between the exhaust port of the compressor and the first port of the first heat exchanger 2, the other end of the fourth branch is communicated with the inlet of the vortex tube 5, the outlet of the cold end of the vortex tube 5 is communicated with one end of a fifth branch, the other end of the fifth branch is communicated with the port 7D of the thermoelectric generation device 7C of the compressor, the port 7C of the thermoelectric generation device is communicated with one end of a sixth branch, the other end of the sixth branch is communicated with the first port of the second heat exchanger 2-2, the second port of the second heat exchanger 2-2 is communicated with one end of a seventh branch, and the other end of the seventh branch is communicated with the third branch;
the outlet of the hot end of the vortex tube 5 is communicated with one end of an eighth branch, the other end of the eighth branch is communicated with the first port of the third heat exchanger 2-3, the second port of the third heat exchanger 2-3 is communicated with one end of a ninth branch, and the other end of the ninth branch is communicated with the second branch.
Specifically, the thermoelectric generation device 7 is provided with a hot end 7-1 of the power generation device, a cold end 7-3 of the power generation device and a thermoelectric generation sheet 7-2 arranged at the hot end of the thermoelectric generation device 7 and the cold end of the thermoelectric generation device 7, wherein the hot end of the thermoelectric generation device 7 corresponds to a passage L1 of the thermoelectric generation device 7, and the cold end of the thermoelectric generation device 7 corresponds to a passage L2 of the thermoelectric generation device 7.
The high-temperature high-pressure refrigerant with the temperature of T tangentially enters an inlet of the vortex tube 5 to be depressurized and accelerated, and performs high-speed circular motion in a vortex chamber to generate free vortex, energy exchange and rapid cold-heat separation are generated in a hot end tube due to different angular velocities of inner and outer layers of air flow, the angular velocity of the inner layer of air flow is reduced, energy is lost, the temperature is reduced, the flow direction is changed to flow out from a cold end outlet of the vortex tube 5 under the blocking action of a hot end regulating valve, and the temperature of the refrigerant at the cold end outlet of the vortex tube 5 is T1; the angular velocity of the outer airflow is increased, the refrigerant flows out from the hot end outlet of the vortex tube 5 under the rotation friction and the energy transfer of the inner layer and the outer layer in the tube, and the temperature of the refrigerant at the hot end outlet of the vortex tube 5 is T2; the refrigerant temperatures of the inlet of the vortex tube 5, the hot end outlet of the vortex tube 5 and the cold end outlet of the vortex tube 5 are as follows: t > T2 > T1.
The pressure of the inlet of the vortex tube 5 is P, the pressure of the outlet of the cold end of the vortex tube 5 is P1, the pressure of the outlet of the hot end of the vortex tube 5 is P2, and the pressures of the inlet of the vortex tube 5, the outlet of the cold end of the vortex tube 5 and the outlet of the hot end of the vortex tube 5 can be satisfied: p > P2 > P1; as the inlet pressure of the vortex tube 5 increases, the refrigeration effect deltatc gradually increases, and the heating effect deltath gradually decreases; but from the point of view of the specific enthalpy difference, the heating effect increases and the cooling effect decreases as the inlet pressure increases.
The cold flow ratio of the vortex tube 5 is μc, and the refrigerating and heating effects of the vortex tube 5 are increased along with the increase of the cold flow ratio, and when the cold flow ratio is increased to a preset value μ1, the optimal refrigerating effect is achieved.
The change in the temperature of the refrigerant at the inlet of the vortex tube 5 has little effect on the refrigeration effect deltatc.
The cold flow ratio, μc, of the vortex tube 5 is defined as the ratio of the cold end outlet mass flow to the vortex tube 5 inlet mass flow.
The compressor 1 discharges high-temperature and high-pressure refrigerant gas from an exhaust port of the compressor 1, part of the refrigerant gas exchanges heat in the first heat exchanger 2, gaseous refrigerant in the first heat exchanger 2 exchanges heat with air through the first fan 4 and condenses into liquid refrigerant, the liquid refrigerant exchanged by the first heat exchanger 2 enters the thermoelectric generation device 7 and generates a temperature difference with low-temperature liquid refrigerant at a cold end outlet of the vortex tube 5, so that potential difference is generated, and voltage generated by the thermoelectric generation sheet 7-2 is stored by being connected with the storage battery 10.
After the compressor 1 discharges the high-temperature and high-pressure refrigerant gas, part of the refrigerant gas enters the vortex tube 5, the high-temperature and high-pressure refrigerant gas entering the vortex tube 5 is rotationally compressed in the tube, the low-temperature refrigerant gas is discharged from the outlet of the cold end of the vortex tube 5, the high-temperature refrigerant gas is discharged from the outlet of the hot end of the vortex tube 5, the refrigerant gas discharged from the outlet of the cold end of the vortex tube 5 enters the thermoelectric generation device 7, and the temperature difference is generated with the high-temperature and high-pressure refrigerant discharged from the first heat exchanger 2, so that a potential difference is generated, and the voltage generated by the thermoelectric generation sheet 7-2 is stored by being connected with the storage battery 10.
According to the refrigerating system provided by the embodiment of the invention, the vortex tube 5, the thermoelectric generation device 7 and a pipeline for the thermoelectric generation device are arranged, the coupling characteristic of the vortex tube 5 and the refrigerant coupling characteristic of the semiconductor thermoelectric generation are utilized, the seebeck effect is utilized, the thermoelectric generation sheet 7-2 is positioned between the low-temperature refrigerant from the cold end of the vortex tube 5 and the high-temperature refrigerant from the condenser, so that the thermoelectric generation is realized, particularly, the thermoelectric generation device 7 is provided with the refrigerant with the temperature difference through the vortex tube 5, the thermoelectric generation device 7 can generate electric energy while refrigerating the refrigerating system, the electric energy is stored through the storage battery 10, the recovery of part of the electric energy of the refrigerating system can be realized, the recovered electric energy is stored in the storage battery 10, and the storage battery 10 can provide a sustainable power supply for indoor emergency lighting or a control panel of a refrigerating system unit.
In some embodiments, the refrigeration system further comprises: a subcooler 8;
the subcooler 8 has a passage L3 and a passage L4, heat exchange is possible between the passage L3 and the passage L4, the passage L3 has a subcooler 8A port and a subcooler 8B port, and the passage L4 has a subcooler 8C port and a subcooler 8D port;
the passage L3 is communicated in the second branch and is positioned at one side of the second branch, which is far away from the electronic expansion valve 3, relative to the communication point between the ninth branch and the second branch, the opening of the subcooler 8A is close to the opening of the thermoelectric generation device 7B, and the opening of the subcooler 8B is close to the communication point between the ninth branch and the second branch;
the passage L4 is communicated in the sixth branch, the opening of the subcooler 8C is close to the first end opening of the second heat exchanger 2-2, and the opening of the subcooler 8D is close to the opening of the thermoelectric generation device 7C.
Specifically, the low-temperature refrigerant liquid from the thermoelectric generation device 7 enters the subcooler 8, so that the high-temperature and high-pressure refrigerant liquid in the passage L3 can be cooled, the supercooling degree of the refrigerant liquid is improved, and the overall refrigerating capacity of the system is improved.
In some embodiments, the refrigeration system further comprises: a superheater 9;
the superheater 9 has a passage L5 and a passage 6, heat exchange is possible between the passage L5 and the passage L6, the passage L3 has a superheater 9A port and a superheater 9B port, and the passage L4 has a superheater 9C port and a superheater 9D port;
the eighth branch is also communicated with a first bypass, the passage L5 is communicated in the first bypass, the port of the superheater 9A is close to the hot end outlet of the vortex tube 5, and the port of the superheater 9B is close to the first port of the third heat exchanger 2-3;
the passage L6 is communicated in the third branch, the port of the superheater 9C is close to the second port of the fourth heat exchanger 2-1, and the port of the superheater 9D is close to the air suction port of the compressor;
wherein the first bypass is further provided with a superheater 9 valve between the superheater 9A port and the eighth bypass.
Specifically, before the refrigerant is circulated into the compressor 1, the refrigerant is heated, so that the refrigerant can be better vaporized into gas, more refrigerant can flow back into the compressor 1, and the refrigerating efficiency of the whole refrigerating system is improved.
In some embodiments, a vortex tube 5 inlet control valve is provided in the fourth branch, a vortex tube 5 cold end outlet pressure control valve is provided in the fifth branch, and a vortex tube 5 hot end outlet control valve is provided in the eighth branch.
Specifically, control valves are arranged at the inlet of the vortex tube 5, the outlet of the cold end of the vortex tube 5 and the outlet of the hot end of the vortex tube 5, and the control valves can be pressure regulating valves and can control the pressure of the refrigerant at each inlet and outlet of the vortex tube 5.
In some embodiments, the fifth branch is provided with a first flow regulating valve 2', and the fifth branch is communicated with a second bypass at two ends of the first flow regulating valve 2', and the second bypass is provided with a third flow regulating valve 2' -1;
wherein, the first flow regulating valve 2 'and the third flow regulating valve 2' -1 form a control valve for the outlet pressure of the cold end of the vortex tube 5;
wherein, the first flow regulating valve 2 'is used for coarsely regulating the pressure of the outlet of the cold end of the vortex tube 5, and the third flow regulating valve 2' -1 is used for finely regulating the pressure of the outlet of the cold end of the vortex tube 5.
Specifically, the adjustment precision of the first flow rate adjusting valve 2 'is smaller than that of the third flow rate adjusting valve 2' -1, but the adjustment speed is higher, and the third flow rate adjusting valve 2'-1 and the first flow rate adjusting valve 2' are arranged in parallel, so that the pressure of the cold end outlet of the vortex tube 5 can be adjusted more accurately and rapidly.
In some embodiments, the eighth branch is provided with a second flow regulating valve 3', and the eighth branch is communicated with a third bypass at two ends of the second flow regulating valve 3', and the third bypass is provided with a fourth flow regulating valve 3' -1;
wherein the second flow regulating valve 3 'and the fourth flow regulating valve 3' -1 form a hot end outlet pressure control valve of the vortex tube 5;
the second flow regulating valve is used for roughly regulating the pressure of the hot end outlet of the vortex tube 5, and the fourth flow regulating valve is used for finely regulating the pressure of the hot end outlet of the vortex tube 5.
Specifically, the adjusting precision of the second flow adjusting valve 3 'is smaller than that of the fourth flow adjusting valve 3' -1, but the adjusting speed is faster, and the fourth flow adjusting valve 3'-1 and the second flow adjusting valve 3' are arranged in parallel, so that the pressure of the hot end outlet of the vortex tube 5 can be adjusted more accurately and rapidly.
In some embodiments, the refrigeration system further comprises: a gas-liquid separator 6;
the gas-liquid separator 6 is arranged in the third branch, the inlet of the gas-liquid separator 6 is communicated with the second port of the fourth heat exchanger 2-1, and the outlet of the gas-liquid separator 6 is communicated with the air suction port of the compressor 1.
Specifically, the gas-liquid separator 6 can separate the gaseous refrigerant and the liquid refrigerant, so that the refrigerant flowing back to the air suction port of the compressor 1 is the gaseous refrigerant, thereby avoiding liquid impact caused by the fact that the liquid refrigerant flows back to the compressor 1, influencing the normal operation of the compressor 1, and reducing the service life of the compressor 1.
In some embodiments, the controller is capable of changing the mode of operation of the refrigeration system based on user demand.
In some embodiments, the operating mode includes:
a conventional refrigeration mode, in which the vortex tube 5 inlet control valve is closed;
in the high-temperature refrigeration non-power generation mode, an inlet valve of the vortex tube 5 is opened, a cold end outlet control valve of the vortex tube 5 is closed, a hot end outlet control valve of the vortex tube 5 is completely opened, and a superheater 9 valve is closed;
in the high-temperature refrigeration power generation mode, an inlet valve of the vortex tube 5 is opened, a cold end outlet control valve of the vortex tube 5 is opened, a hot end outlet control valve of the vortex tube 5 is completely opened, and a superheater 9 valve is closed.
Specifically, in the conventional refrigeration mode, the inlet control valve of the vortex tube 5 is closed, and the refrigerant does not pass through the vortex tube 5, so that the whole system can normally perform refrigeration.
In the high-temperature refrigeration non-power generation mode, mainly because the ambient temperature is high, the heat exchange effect of the condenser end is poor, in order to avoid the unit from being protected, the unit cannot normally operate, the inlet control valve of the vortex tube 5 is controlled, the heat exchange load of a part of the condenser is unloaded, the cold end outlet control valve of the vortex tube 5 is closed at the moment, the vortex tube 5 is degenerated into a throttling element at the moment, the hot end outlet control valve of the vortex tube 5 is completely opened, the superheater 9 valve is closed, the refrigerant coming out from the hot end outlet of the vortex tube 5 enters the third heat exchanger 2-3 to perform heat exchange treatment, and then the refrigerant coming out from the second heat exchanger 2-2 is throttled and depressurized together to participate in high-temperature refrigeration of the system. In the conventional refrigeration system, under the condition of a high-temperature environment, a mode of bypassing a part of refrigerant through hot gas is generally selected, so that the heat exchange load of a condenser is reduced, but the refrigeration effect is poor, and the refrigeration system provided by the application can fully participate in the refrigeration of the system by unloading the part of refrigerant, so that the refrigeration capacity can meet the requirements of customers under the high-temperature environment.
In the high-temperature refrigeration power generation mode, only the cold end outlet control valve of the vortex tube 5 is opened on the basis of the high-temperature refrigeration non-power generation mode, and the generated energy and the refrigerating capacity can be controlled by adjusting the opening of the cold end control valve of the vortex tube 5.
In some embodiments, the operational mode further comprises:
in the low-frequency power generation mode, an inlet valve of the vortex tube 5 is opened, an outlet valve of the cold end of the vortex tube 5 is opened, an outlet control valve of the hot end of the vortex tube 5 is opened, and a valve of the superheater 9 is opened;
in the high-efficiency power generation mode, an inlet valve of the vortex tube 5 is opened, so that the inlet pressure of the vortex tube 5 is regulated to the maximum, and a control valve of a cold end outlet of the vortex tube 5 is opened, so that the cold flow ratio μc of the cold end outlet of the vortex tube 5 reaches a preset value, wherein the cold flow ratio μc is the ratio of the mass flow of the cold end outlet of the vortex tube 5 to the mass flow of the inlet of the vortex tube 5.
Specifically, in the low-frequency power generation mode, the hot end load is lower, the cooling capacity is not matched with the refrigerating capacity at the lowest frequency of the compressor 1, the excessive cooling of the cooling section is easy to cause at the moment, the liquid impact risk of the compressor 1 is avoided, at the moment, the inlet control valve of the vortex tube 5, the hot end outlet control valve of the vortex tube 5, the cold end outlet control valve of the vortex tube 5 and the superheater 9 valve are required to be opened, the refrigerating capacity of the system is maintained to be matched with the cold end load by controlling the hot end outlet control valve of the vortex tube 5 and the superheater 9 valve, and the stability of the superheat degree of the system is maintained.
In the efficient power generation mode, if the coupling characteristic of the vortex tube 5 and the refrigerant is known, during refrigeration, the high pressure of the system is about 3MPa, the exhaust temperature of the compressor 1 is about 70-100 ℃, in this mode, the temperature difference between the cold end and the hot end of the thermoelectric power generation device 7 needs to be kept as maximum as possible, namely, the inlet pressure of the vortex tube 5 is maximized through the inlet control valve of the vortex tube 5, the hot end outlet control valve of the vortex tube 5 is kept constant, the cold flow ratio μc is regulated through regulating the cold end outlet control valve of the vortex tube 5, the cold flow ratio reaches a preset value μ1, and the refrigeration effect ΔTC of the vortex tube 5 at the moment is maximized through regulating the valve, namely, the temperature difference between the cold end and the hot end of the thermoelectric power generation device 7 is maximized, so that the normal operation of the unit is not affected in this mode.
In some embodiments, the second heat exchanger 2-2 is provided at the device to be cooled;
preferably, the device to be cooled is a compressor 1.
Specifically, in the second heat exchanger 2-2, the second heat exchanger 2-2 may be disposed at a device to be cooled, and the partial cooling capacity generated by the second heat exchanger 2-2 may be used to cool the device to be cooled, where the device to be cooled may be an electric cabinet to be cooled or may also be a compressor 1 to be cooled, so that refrigerant resources may be fully utilized, and resource waste is reduced.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. A refrigeration system, comprising:
the device comprises a compressor (1), a first heat exchanger (2), a vortex tube (5), a thermoelectric generation device (7), an electronic expansion valve (3), a second heat exchanger (2-2), a storage battery (10), a third heat exchanger (2-3) and a fourth heat exchanger (2-1);
the thermoelectric generation device (7) is provided with a passage L1, a passage L2 and a power generation end, heat exchange can be carried out between the passage L1 and the passage L2, the passage L1 is provided with a thermoelectric generation device (7) A port and a thermoelectric generation device (7) B port, the passage L2 is provided with a thermoelectric generation device (7) C and a thermoelectric generation device (7) D port, and the power generation end is electrically connected with the storage battery (10);
the vortex tube (5) is provided with a vortex tube (5) inlet, a vortex tube (5) cold end outlet and a vortex tube (5) hot end outlet;
the exhaust port of the compressor (1) is communicated with one end of a first branch, the other end of the first branch is communicated with the first port of the first heat exchanger (2), the second port of the first heat exchanger (2) is communicated with one end of an eleventh branch, the other end of the eleventh branch is communicated with the A port of the thermoelectric generation device (7), the B port of the thermoelectric generation device (7) is communicated with one end of a second branch, the other end of the second branch is communicated with the first port of the electronic expansion valve (3), the second port of the electronic expansion valve (3) is communicated with one end of a tenth branch, the other end of the tenth branch is communicated with the first port of the fourth heat exchanger (2-1), the second port of the fourth heat exchanger (2-1) is communicated with one end of a third branch, and the other end of the third branch is communicated with the air suction port of the compressor (1);
the first branch is further communicated with one end of a fourth branch between the exhaust port of the compressor and the first port of the first heat exchanger (2), the other end of the fourth branch is communicated with the inlet of the vortex tube (5), the cold end outlet of the vortex tube (5) is communicated with one end of a fifth branch, the other end of the fifth branch is communicated with the D port of the thermoelectric generation device (7), the C port of the thermoelectric generation device (7) is communicated with one end of a sixth branch, the other end of the sixth branch is communicated with the first port of the second heat exchanger (2-2), the second port of the second heat exchanger (2-2) is communicated with one end of a seventh branch, and the other end of the seventh branch is communicated with the third branch;
the hot end outlet of the vortex tube (5) is communicated with one end of an eighth branch, the other end of the eighth branch is communicated with the first port of the third heat exchanger (2-3), the second port of the third heat exchanger (2-3) is communicated with one end of a ninth branch, and the other end of the ninth branch is communicated with the second branch.
2. The refrigeration system of claim 1, wherein the refrigeration system further comprises: -a subcooler (8);
the subcooler (8) is provided with a passage L3 and a passage L4, heat exchange can be carried out between the passage L3 and the passage L4, the passage L3 is provided with a subcooler (8) A port and a subcooler (8) B port, and the passage L4 is provided with a subcooler (8) C port and a subcooler (8) D port;
the passage L3 is communicated in the second branch and is positioned at one side of the second branch, which is far away from the electronic expansion valve (3), relative to the communication point of the ninth branch and the second branch, the opening A of the subcooler (8) is close to the opening B of the thermoelectric generation device (7), and the opening B of the subcooler (8) is close to the communication point of the ninth branch and the second branch;
the passage L4 is communicated in a sixth branch, a C port of the subcooler (8) is close to the first port of the second heat exchanger (2-2), and a D port of the subcooler (8) is close to a C port of the thermoelectric generation device (7).
3. The refrigeration system of claim 2, wherein the refrigeration system further comprises: a superheater (9);
the superheater (9) is provided with a passage L5 and a passage 6, heat exchange can be carried out between the passage L5 and the passage L6, the passage L3 is provided with a superheater (9) A port and a superheater (9) B port, and the passage L4 is provided with a superheater (9) C port and a superheater (9) D port;
the eighth branch is also communicated with a first bypass, the passage L5 is communicated in the first bypass, the port A of the superheater (9) is close to the hot end outlet of the vortex tube (5), and the port B of the superheater (9) is close to the first port of the third heat exchanger (2-3);
the passage L6 is communicated in the third branch, a port C of the superheater (9) is close to a second port of the fourth heat exchanger (2-1), and a port D of the superheater (9) is close to an air suction port of the compressor (1);
and a superheater (9) valve is further arranged between the superheater (9) A port and the eighth branch passage.
4. A refrigeration system according to claim 3, wherein,
an inlet control valve of the vortex tube (5) is arranged in the fourth branch, a cold end outlet pressure control valve of the vortex tube (5) is arranged in the fifth branch, and a hot end outlet control valve of the vortex tube (5) is arranged in the eighth branch.
5. A refrigeration system according to claim 4 wherein,
a first flow regulating valve (2 ') is arranged in the fifth branch, two ends of the first flow regulating valve (2 ') are communicated with a second bypass, and a third flow regulating valve (2 ' -1) is arranged in the second bypass;
wherein the first flow regulating valve (2 ') and the third flow regulating valve (2' -1) form a cold end outlet pressure control valve of the vortex tube (5);
the first flow regulating valve (2 ') is used for coarsely regulating the pressure of the cold end outlet of the vortex tube (5), and the third flow regulating valve (2' -1) is used for finely regulating the pressure of the cold end outlet of the vortex tube (5).
6. The refrigeration system of claim 4, comprising:
the eighth branch is provided with a second flow regulating valve (3 '), two ends of the second flow regulating valve (3 ') are communicated with a third bypass, and a fourth flow regulating valve (3 ' -1) is arranged in the third bypass;
wherein the second flow regulating valve (3 ') and the fourth flow regulating valve (3' -1) form a hot end outlet pressure control valve of the vortex tube (5);
the second flow regulating valve is used for coarsely regulating the pressure of the hot end outlet of the vortex tube (5), and the fourth flow regulating valve is used for finely regulating the pressure of the hot end outlet of the vortex tube (5).
7. The refrigeration system of claim 1, wherein the refrigeration system further comprises: a gas-liquid separator (6);
the gas-liquid separator (6) is arranged in the third branch, the inlet of the gas-liquid separator (6) is communicated with the second port of the fourth heat exchanger (2-1), and the outlet of the gas-liquid separator (6) is communicated with the air suction port of the compressor (1).
8. The refrigeration system of claim 4, further comprising:
a controller capable of changing an operating mode of the refrigeration system based on a user demand;
the operation mode includes:
a normal refrigeration mode in which the vortex tube (5) inlet control valve is closed;
in a high-temperature refrigeration non-power generation mode, an inlet valve of the vortex tube (5) is opened, a cold end outlet control valve of the vortex tube (5) is closed, a hot end outlet control valve of the vortex tube (5) is completely opened, and a valve of the superheater (9) is closed;
in the high-temperature refrigeration power generation mode, an inlet valve of the vortex tube (5) is opened, a cold end outlet control valve of the vortex tube (5) is opened, a hot end outlet control valve of the vortex tube (5) is completely opened, and a valve of the superheater (9) is closed.
9. The refrigeration system of claim 8, wherein,
the operation mode further includes:
the low-frequency power generation mode is characterized in that an inlet valve of the vortex tube (5) is opened in the low-frequency power generation mode, a cold end outlet valve of the vortex tube (5) is opened, a hot end outlet control valve of the vortex tube (5) is opened, and a valve of the superheater (9) is opened;
in the efficient power generation mode, an inlet valve of the vortex tube (5) is opened to enable inlet pressure of the vortex tube (5) to be adjusted to be maximum, and a cold end outlet control valve of the vortex tube (5) is opened to enable a cold flow ratio μc of a cold end outlet of the vortex tube (5) to reach a preset value, wherein the cold flow ratio μc is a ratio of mass flow of the cold end outlet of the vortex tube (5) to mass flow of the inlet of the vortex tube (5).
10. A refrigeration system according to claim 1 wherein,
the second heat exchanger (2-2) is arranged at the equipment to be cooled.
CN202410010367.5A 2024-01-04 2024-01-04 Refrigerating system Active CN117515941B (en)

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US4333017A (en) * 1980-10-20 1982-06-01 Connell John J O Method and apparatus for closed loop vortex operation
CN102338496A (en) * 2011-09-30 2012-02-01 浙江大学 Multi-temperature-zone refrigeration system with vortex tube
CN104795862A (en) * 2015-05-21 2015-07-22 中国石油大学(华东) Portable charging device based on vortex tube
CN105333637A (en) * 2015-11-24 2016-02-17 北京运特科技有限公司 Manufacturing technology of multi-effect multi-stage vortex tube cold-hot dual-energy machine system
GB201913401D0 (en) * 2019-09-17 2019-10-30 Oxford Flow Ltd Differential pressure power generator
CN210463662U (en) * 2019-09-10 2020-05-05 重庆三峡学院 Water dispenser heat exchanger based on vortex tube
CN114111100A (en) * 2021-11-16 2022-03-01 珠海格力电器股份有限公司 Refrigerating system, control method and air conditioner
CN116007219A (en) * 2022-12-14 2023-04-25 珠海格力电器股份有限公司 Refrigerating system and control method thereof
CN117190345A (en) * 2023-08-31 2023-12-08 珠海格力电器股份有限公司 Control method and air conditioning system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333017A (en) * 1980-10-20 1982-06-01 Connell John J O Method and apparatus for closed loop vortex operation
CN102338496A (en) * 2011-09-30 2012-02-01 浙江大学 Multi-temperature-zone refrigeration system with vortex tube
CN104795862A (en) * 2015-05-21 2015-07-22 中国石油大学(华东) Portable charging device based on vortex tube
CN105333637A (en) * 2015-11-24 2016-02-17 北京运特科技有限公司 Manufacturing technology of multi-effect multi-stage vortex tube cold-hot dual-energy machine system
CN210463662U (en) * 2019-09-10 2020-05-05 重庆三峡学院 Water dispenser heat exchanger based on vortex tube
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