CN219976546U - Heat and cold supply system - Google Patents

Heat and cold supply system Download PDF

Info

Publication number
CN219976546U
CN219976546U CN202320823426.1U CN202320823426U CN219976546U CN 219976546 U CN219976546 U CN 219976546U CN 202320823426 U CN202320823426 U CN 202320823426U CN 219976546 U CN219976546 U CN 219976546U
Authority
CN
China
Prior art keywords
heat
outlet
channel
valve
inlet
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.)
Active
Application number
CN202320823426.1U
Other languages
Chinese (zh)
Inventor
赵若昱
房伟
王春艳
鲁圆
刘佳
余小兵
杨利
刘学亮
郑天帅
杨庆川
李保垒
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.)
Yantai Power Plant Huaneng Shandong Generating Co ltd
Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
Original Assignee
Yantai Power Plant Huaneng Shandong Generating Co ltd
Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yantai Power Plant Huaneng Shandong Generating Co ltd, Xian Thermal Power Research Institute Co Ltd, Xian Xire Energy Saving Technology Co Ltd filed Critical Yantai Power Plant Huaneng Shandong Generating Co ltd
Priority to CN202320823426.1U priority Critical patent/CN219976546U/en
Application granted granted Critical
Publication of CN219976546U publication Critical patent/CN219976546U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model belongs to the field of energy utilization, and particularly relates to a heat and cold supply system, which comprises a heat exchange component, a first valve and a heat pump, wherein the heat exchange component is provided with a first channel and a second channel which are mutually independent and mutually exchange heat, one end of the first channel is connected with the first valve, the other end of the first valve is connected with a steam turbine, an inlet of the second channel is connected with a water supply end of a heating user, an outlet of the second channel is connected with the water supply end of the heating user, the heat pump is provided with a first pipeline and a second pipeline, the inlet of the first pipeline is communicated with the outlet of the first channel, the inlet of the second pipeline is communicated with a water supply source, the heat pump is suitable for refrigerating fluid in the second pipeline by utilizing the internal energy of the fluid in the first channel, and the outlet of the second pipeline is connected with a cold user. The heat and cold supply system can supply heat and cold to the user side, avoid energy waste and improve the applicability and safety of the heat and cold supply system.

Description

Heat and cold supply system
Technical Field
The utility model belongs to the field of energy utilization, and particularly relates to a heat and cold supply system.
Background
The light-coal complementary heat supply technology utilizes the solar heat collector to collect solar heat energy for energy storage of the energy storage device, and the energy storage device is used for heating or supplying hot water to a user side, so that the generated energy of a coal-fired power plant can be increased or the fuel consumption can be reduced, and the emission of greenhouse gases can be reduced. In the related art, a high-temperature heat source is adopted to supply heat to a low-temperature heat source, so that refrigeration cannot be performed, and the heat supply system cannot meet the refrigeration requirement at the same time.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the utility model provides a heat and cold supply system which can supply heat and cold to a user side, avoid energy waste and improve the applicability and safety of the heat and cold supply system.
The heat and cold supply system of the embodiment of the utility model comprises: the heat exchange component is provided with a first channel and a second channel which are mutually independent and mutually exchange heat, one end of the first channel is connected with the first valve, the other end of the first valve is connected with the steam turbine, the inlet of the second channel is connected with the water supply end of a heating user, and the outlet of the second channel is connected with the water use end of the heating user; the heat pump is provided with a first pipeline and a second pipeline, wherein the inlet of the first pipeline is communicated with the outlet of the first channel, the inlet of the second pipeline is communicated with the water supply source, the heat pump is suitable for refrigerating fluid in the second pipeline by utilizing the internal energy of the fluid in the first channel, and the outlet of the second pipeline is connected with the cold user end.
The heat and cold supply system provided by the embodiment of the utility model can supply heat and cold to the user side, avoid energy waste and improve the applicability and safety of the heat and cold supply system.
In some embodiments, the heating and cooling system further comprises a first refrigerator and a second valve, wherein the inlet of the first refrigerator is communicated with the outlet of the second pipeline, the outlet of the first refrigerator is connected with one end of the second valve, and the outlet of the second valve is connected with the cold user end.
In some embodiments, the heating and cooling system further comprises a temperature sensor connected to the outlet of the first refrigerator and a flow regulating valve connected at one end to the second valve.
In some embodiments, the heating and cooling system further comprises a light energy assembly adapted to utilize solar energy to generate thermal energy to heat a thermal storage medium, and an energy storage component connected at one end to the light energy assembly for storing the thermal storage medium heated by the light energy assembly,
the heat pump is provided with a third channel and a fourth channel which are independent and can exchange heat mutually, an inlet of the third channel is communicated with the water supply source, an outlet of the third channel is connected with the hot water user end, and an inlet of the fourth channel is connected with the energy storage component.
In some embodiments, the energy storage component comprises an energy storage component, a heating component and a wind energy component, wherein the wind energy component is suitable for generating electric energy by wind energy, the wind energy component is connected with the heating component, and the energy storage component is connected with the heat storage medium heated by the heating component.
In some embodiments, the heating and cooling system further comprises a first pump, one end of the first pump is connected to the heating user water supply end, and the other end of the first pump is communicated with the second channel inlet.
In some embodiments, the heating and cooling system further comprises a condenser and a waste heat boiler, wherein an inlet of the condenser is communicated with an outlet of the fourth channel, and an outlet of the condenser is connected with the waste heat boiler.
In some embodiments, the heating and cooling system further comprises a cooling member having one end in communication with the outlet of the fourth channel and the other end in communication with the inlet of the condenser.
In some embodiments, the cooling component of the heating and cooling system further comprises a second refrigerator and an air cooling tower, wherein the inlet of the second refrigerator is communicated with the outlet of the first channel, the outlet of the second refrigerator is communicated with the inlet of the air cooling tower, and the outlet of the air cooling tower is communicated with the inlet of the condenser.
In some embodiments, the heating and cooling system further comprises a third valve and a fourth valve, wherein one end of the third valve is connected with the outlet of the first channel, the other end of the third valve is connected with the inlet of the first pipeline, one end of the fourth valve is connected with the outlet of the first pipeline, and the outlet of the fourth valve is connected with the cooling component.
Drawings
Fig. 1 is a schematic diagram of a heating and cooling system according to an embodiment of the present utility model.
Reference numerals:
a heat exchange part 1, a first valve 2, a heat pump 3, a high-pressure cylinder 4, a heating user water end 5, a heating user water end 6, a cold user end 7, a first refrigerator 8, a second valve 9, a first pump 10, a condenser 11, a third valve 12, a fourth valve 13, a third booster pump 14, a ninth valve 15, a temperature sensor 16,
the light energy assembly 17, the solar collector 1701, the first booster pump 1702, the fifth valve 1703, the sixth valve 1704,
the energy storage component 18, the energy storage 1801, the second booster pump 1802, the seventh valve 1803, the eighth valve 1804, and the water supply 19.
Detailed Description
Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
The heat and cold supply system of the embodiment of the utility model comprises a heat exchange component 1, a first valve 2 and a heat pump 3, wherein the heat exchange component 1 is provided with a first channel and a second channel which are mutually independent and mutually exchange heat, one end of the first channel is connected with the first valve 2, the other end of the first valve 2 is connected with a steam turbine, the inlet of the second channel is connected with a heating user water supply end 6, the outlet of the second channel is connected with a heating user water supply end 5, the heat pump 3 is provided with a first pipeline and a second pipeline, the inlet of the first pipeline is communicated with the outlet of the first channel, the inlet of the second pipeline is communicated with a water supply source 19, the heat pump 3 is suitable for refrigerating fluid in the second pipeline by utilizing the internal energy of the fluid in the first channel, and the outlet of the second pipeline is connected with a cold user end 7.
Specifically, as shown in fig. 1, the steam turbine has a high-pressure cylinder 4. The inlet of the first valve 2 is communicated with the high-pressure cylinder 4, the outlet of the first valve 2 is communicated with the inlet of the first channel, the high-pressure cylinder 4 enters the first channel through the first valve 2, the inlet of the second channel is communicated with the heating user water supply end 6, the heating user water supply end 6 is suitable for supplying water to the inlet of the second channel, the water of the first channel is suitable for heating the water of the second channel in a heat transfer mode, and the heated water flows into the heating user water end 5 through the outlet of the second channel, so that the urban heating requirement is met.
The inlet of the second pipeline is communicated with the water supply source 19, the water supply source 19 supplies water to the second pipeline, the outlet of the first channel is communicated with the inlet of the first pipeline, the heat pump 3 uses the internal energy of the fluid in the first pipeline as a driving source, and the heat pump 3 can cool and refrigerate the water in the second pipeline.
According to the heat and cold supply system provided by the embodiment of the utility model, a heat exchange part 1 is arranged to heat a heating user, and a heat pump 3 is arranged to cool a cold user terminal 7, so that energy waste is avoided, and the applicability and safety of the heat and cold supply system are improved.
In some embodiments, the heating and cooling system further comprises a first refrigerator 8 and a second valve 9, wherein the inlet of the first refrigerator 8 is communicated with the outlet of the second pipeline, the outlet of the first refrigerator 8 is connected with one end of the second valve 9, and the outlet of the second valve 9 is connected with the cold user end 7.
Specifically, as shown in fig. 1, the inlet of the first refrigerator 8 is communicated with the outlet of the second channel, the first refrigerator 8 is suitable for cooling the fluid again, and further reducing the temperature of the fluid, the outlet of the first refrigerator 8 is connected with one end of the second valve 9, and the other end of the first valve 2 is connected with the cold user end 7 to provide cold water with a lower temperature to the cold user end 7. Thereby meeting the demand of cooling in cities.
In some embodiments, the heating and cooling system further comprises a temperature sensor 16 and a flow regulating valve, the temperature sensor 16 being connected to the outlet of the first refrigerator 8, one end of the flow regulating valve being connected to the second valve 9.
Specifically, as shown in fig. 1, one end of the temperature sensor 16 is connected to the outlet of the first refrigerator 8 to monitor the temperature of the fluid at the outlet of the first refrigerator 8, for example, when the temperature of the fluid is too high, the power of the first refrigerator 8 may be adjusted to reduce the temperature of the fluid, so as to improve the stability and safety of the heating and cooling system.
In some embodiments, the heating and cooling system further comprises a light energy assembly 17 and an energy storage component 18, wherein the light energy assembly 17 is adapted to utilize solar energy to generate heat energy to heat the heat storage medium, one end of the energy storage component 18 is connected to the light energy assembly 17 for storing the heated heat storage medium of the light energy assembly 17,
the heat pump 3 has a third channel and a fourth channel which are independent and can exchange heat with each other, an inlet of the third channel is communicated with the water supply source 19, an outlet of the third channel is connected with a hot water user end, and an inlet of the fourth channel is connected with the energy storage component 18.
Specifically, as shown in fig. 1, the optical energy assembly 17 includes a solar heat collector 1701, a first booster pump 1702, a fifth valve 1703 and a sixth valve 1704, the energy storage component 18 includes an energy storage member 1801, a second booster pump 1802, a seventh valve 1803 and an eighth valve 1804, the solar heat collector 1701 is adapted to generate heat by using solar energy to heat an energy storage medium, an outlet of the solar heat collector 1701 is communicated with an inlet of the first booster pump 1702, an outlet of the first booster pump 1702 is connected with one end of the fifth valve 1703, and the other end of the fifth valve 1703 is communicated with a first inlet of the energy storage member 1801, so that after the solar heat collector 1701 heats the energy storage medium, the second booster pump 1802 is adapted to pump the heated energy storage medium into the energy storage member 1801, the first outlet of the energy storage member 1801 is connected with one end of the sixth valve 1704, the other end of the sixth valve 1704 is connected with an inlet of the solar heat collector, and the energy storage member 1801 enters the energy storage medium into the solar heat collector 1701 through the sixth valve.
The second outlet of the energy storage member 1801 is connected with one end of the eighth valve 1804, the other end of the eighth valve 1804 is communicated with the inlet of the fourth channel of the heat pump 3, the energy storage member 1801 is used for introducing energy storage medium into the third channel through the eighth valve 1804, the energy storage medium in the fourth channel heats the fluid in the third channel through heat transfer, and the heated fluid is connected with the hot water user end through the outlet of the third channel, so that the heat pump 3 can provide hot water for hot water users while cooling is met, and the stability and safety of a heat supply and cooling system are improved. Further, the outlet of the fourth channel is connected to one end of a seventh valve 1803, the other end of the seventh valve 1803 is connected to the inlet of a second booster pump 1802, and the outlet of the second booster pump 1802 is connected to the second inlet of the energy storage 1801.
Alternatively, the energy storage component 18 includes an energy storage element 1801, a heating element, and a wind energy element, the wind energy element being adapted to generate electrical energy from wind energy, the wind energy element being coupled to the heating element, the energy storage element 1801 being coupled to the heating element to store heated thermal storage medium.
For example, the wind energy component may be a wind power generator, and the energy storage component 1801 may be a molten salt storage tank.
Optionally, the heating and cooling system further comprises a first pump 10, one end of the first pump 10 is connected to the heating user water supply end 6, and the other end of the first pump 10 is communicated with the second channel inlet. The first pump 10 pumps fluid into the inlet of the second channel, improving the stability and safety of the heating and cooling system.
Optionally, the heating and cooling system further comprises a condenser 11 and a waste heat boiler, wherein an inlet of the condenser 11 is communicated with an outlet of the fourth channel, and an outlet of the condenser 11 is connected with the waste heat boiler.
Specifically, as shown in fig. 1, the heating and cooling system further includes a cooling member, one end of which is communicated with the outlet of the fourth passage, and the other end of which is communicated with the inlet of the condenser 11. Thereby liquefying the fluid of the fourth channel, and improving the stability and safety of the steam turbine.
Further, the cooling part of the heat and cold supply system further comprises a second refrigerator and an air cooling tower, the inlet of the second refrigerator is communicated with the outlet of the fourth channel, the outlet of the second refrigerator is communicated with the inlet of the air cooling tower, the outlet of the air cooling tower is communicated with the inlet of the condenser 11, the temperature of fluid flowing out of the fourth channel is further reduced, the stability and safety of the steam turbine are improved, and the stability and safety of the heat and cold supply system are improved.
In some embodiments, the heating and cooling system further comprises a third valve 12 and a fourth valve 13, wherein one end of the third valve 12 is connected to the outlet of the first channel, the other end of the third valve 12 is connected to the inlet of the first pipe, one end of the fourth valve 13 is connected to the outlet of the first pipe, and the outlet of the fourth valve 13 is connected to the cooling member.
Specifically, as shown in fig. 1, when the heat pump 3 does not need to perform refrigeration, the third valve 12 may be closed, and the fourth valve 13 may be opened, so as to directly communicate the outlet of the first channel with the cooling member, so as to adapt to different use environments. Further, the heat and cold supply system further comprises a third booster pump 14 and a ninth valve 15, one end of the ninth valve 15 is connected with the outlet of the first pipeline, the inlet of the third booster pump 14 is communicated with the other end of the ninth valve 15, the inlet of the third booster pump 14 is further connected with the outlet of the fourth valve 13, and then the opening or closing of the third valve 12, the fourth valve 13 and the ninth valve 15 can be adjusted according to different use conditions, so that the applicability and stability of the heat and cold supply system are improved.
In the description of the present utility model, 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", "axial", "radial", "circumferential", 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 utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
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 at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, 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; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean 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 utility model. 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, 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 utility model.

Claims (10)

1. A heating and cooling system, comprising:
the heat exchange component is provided with a first channel and a second channel which are mutually independent and mutually exchange heat, one end of the first channel is connected with the first valve, the other end of the first valve is connected with the steam turbine, the inlet of the second channel is connected with the water supply end of a heating user, and the outlet of the second channel is connected with the water use end of the heating user;
the heat pump is provided with a first pipeline and a second pipeline, wherein the inlet of the first pipeline is communicated with the outlet of the first channel, the inlet of the second pipeline is communicated with the water supply source, the heat pump is suitable for refrigerating fluid in the second pipeline by utilizing the internal energy of the fluid in the first channel, and the outlet of the second pipeline is connected with the cold user end.
2. A heat and cold supply system according to claim 1 further comprising a first refrigerator and a second valve, wherein an inlet of the first refrigerator is in communication with an outlet of the second conduit, an outlet of the first refrigerator is connected to one end of the second valve, and an outlet of the second valve is connected to the cold user side.
3. A heating and cooling system according to claim 2, further comprising a temperature sensor connected to the outlet of the first refrigerator and a flow regulating valve connected at one end to the second valve.
4. A heat and cold supply system according to claim 3 further comprising a light energy assembly adapted to utilize solar energy to generate heat energy to heat a heat storage medium and an energy storage member connected at one end to the light energy assembly for storing the heat storage medium heated by the light energy assembly,
the heat pump is provided with a third channel and a fourth channel which are independent and can exchange heat mutually, an inlet of the third channel is communicated with the water supply source, an outlet of the third channel is connected with the hot water user end, and an inlet of the fourth channel is connected with the energy storage component.
5. A heating and cooling system according to claim 4, wherein the energy storage means comprises an energy storage member, a heating member and a wind energy member, the wind energy member being connected to the heating member to provide electrical energy, the energy storage member being connected to the heating member to store the heated heat storage medium, the wind energy member being adapted to generate electrical energy from wind energy, the wind energy member being connected to the heating member.
6. A heating and cooling system according to claim 1, further comprising a first pump, one end of the first pump being connected to the heating user water supply end, the other end of the first pump being in communication with the second channel inlet.
7. A heat and cold supply system according to claim 5, further comprising a condenser and a waste heat boiler, wherein an inlet of the condenser is in communication with an outlet of the fourth passage, and an outlet of the condenser is connected to the waste heat boiler.
8. A heat and cold supply system according to claim 7, further comprising a cooling member having one end in communication with the outlet of the fourth passage and the other end in communication with the inlet of the condenser.
9. A heat and cold supply system according to claim 8, wherein the cooling unit further comprises a second refrigerator and an air cooling tower, the inlet of the second refrigerator being in communication with the outlet of the fourth channel, the outlet of the second refrigerator being in communication with the inlet of the air cooling tower, the outlet of the air cooling tower being in communication with the inlet of the condenser.
10. A heating and cooling system according to claim 8, further comprising a third valve and a fourth valve, wherein one end of the third valve is connected to the outlet of the first passage, the other end of the third valve is connected to the inlet of the first pipe, one end of the fourth valve is connected to the outlet of the first passage, and the outlet of the fourth valve is connected to the cooling member.
CN202320823426.1U 2023-04-13 2023-04-13 Heat and cold supply system Active CN219976546U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320823426.1U CN219976546U (en) 2023-04-13 2023-04-13 Heat and cold supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320823426.1U CN219976546U (en) 2023-04-13 2023-04-13 Heat and cold supply system

Publications (1)

Publication Number Publication Date
CN219976546U true CN219976546U (en) 2023-11-07

Family

ID=88596399

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320823426.1U Active CN219976546U (en) 2023-04-13 2023-04-13 Heat and cold supply system

Country Status (1)

Country Link
CN (1) CN219976546U (en)

Similar Documents

Publication Publication Date Title
CN103080503B (en) Solar heat utilizes combined-cycle power generation plant
CN209213961U (en) Hazards in Power Plant fused salt thermal storage electric boiler combined heat integrated system
CN201488281U (en) Energy storage-type heat pump water heater
CN110171553B (en) Comprehensive utilization system for waste heat of hydrogen fuel cell power ship
CN108317767B (en) Proton exchange membrane fuel cell waste heat utilization system and method
CN209261636U (en) The integrated system of the accumulation of heat of bleeder steam fused salt and the heat supply of electric boiler combined adjusting peak
CN108625913A (en) It is a kind of to be electrically connected for system based on optically focused frequency division photovoltaic photo-thermal and the distributed cold and heat of duplex conjunction Rankine cycle technology
CN103256145A (en) Combined cooling, heating and power production system based on Stirling engine
CN203375697U (en) Air circulation pump water heater
CN219976546U (en) Heat and cold supply system
CN203257561U (en) Combined cooling, heating and power system based on Stirling engine
CN1381701A (en) Lithium bromide absorption type refrigerator suitable for large temp differnece and able to fully utilize energy
CN103148586B (en) Ultralow-temperature air source heat pump hot water unit with air supply and overheating functions
CN201340135Y (en) Hot water direct combustion single/double effect composite type lithium bromide absorption cold water/hot and cold water set
CN204187888U (en) Cogeneration cooling heating system
CN201152649Y (en) Cold and hot simultaneously fetching typed lithium bromide absorption cold and hot water supply set
CN103712371B (en) Refrigerating and heating systems
CN211739481U (en) Circulating water tank of air energy water heater
CN215929745U (en) Combined heating system
CN201819412U (en) Thermodynamic heat exchange unit and solar energy combined energy supply device
CN115127139B (en) Cooling, steam supplying and heat supplying triple supply system and working method thereof
CN218722400U (en) Lithium bromide refrigerating and heating system utilizing flue gas waste heat
CN219433883U (en) Electricity storage and heat storage system
CN216384666U (en) Distributed energy cascade refrigeration system
CN217107143U (en) Energy-saving composite system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant