CN111412678A - Double-power double-pass driving heat pump system - Google Patents
Double-power double-pass driving heat pump system Download PDFInfo
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- CN111412678A CN111412678A CN202010244018.1A CN202010244018A CN111412678A CN 111412678 A CN111412678 A CN 111412678A CN 202010244018 A CN202010244018 A CN 202010244018A CN 111412678 A CN111412678 A CN 111412678A
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- heat exchanger
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- 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
- F25B11/00—Compression machines, plants or systems, using turbines, e.g. gas turbines
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- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- 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
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- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- 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
- F25B2327/00—Refrigeration system using an engine for driving a compressor
- F25B2327/001—Refrigeration system using an engine for driving a compressor of the internal combustion type
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a double-power double-pass driving heat pump system, which relates to the field of gas heat pumps and comprises a compressor, a gas engine, a motor, a four-way valve, a shell-and-tube heat exchanger, a finned heat exchanger and an automatic control system; the number of the compressors is two, and the compressors are respectively driven by the gas engine and the motor; the automatic control system controls the starting and stopping states of the gas engine and the motor; and after passing through the four-way valve, the refrigerant in the compressor enters the shell-and-tube heat exchanger and the finned heat exchanger to exchange heat with air. Through the implementation of the invention, the gas or electric driving mode can be flexibly selected according to the actual conditions of load demand, electric ladder price, electric power gas supply and the like, thereby ensuring the continuous and stable operation of the system and saving the operation cost.
Description
Technical Field
The invention relates to the field of gas heat pumps, in particular to a double-power double-pass driving heat pump system.
Background
The heat pump system is a device for driving a compressor to work through external power input and transferring a low-level heat source to a high-level heat source, and can effectively utilize low-grade heat energy which is difficult to utilize so as to achieve the aim of saving energy. The heat pump device is mainly provided with four items of an evaporator, a condenser, an expansion valve and a compressor. The conventional heat pump system is mainly divided into two types, namely an electrically driven heat pump (EHP) for supplying power to the heat pump system by an electric drive motor, and a Gas Heat Pump (GHP) for supplying power to the system by driving the heat pump through gas inside. Both have merits: an electrically driven heat pump (EHP) is driven by electric energy to directly drive a compressor to work, and because the electric energy is used, the electrically driven heat pump has the advantages of stable work, low noise, small volume, quick start and simple and quick speed regulation. The Gas Heat Pump (GHP) is a heat pump system driven by the internal combustion engine to burn natural gas to work on a compressor, the heat generated by the heat pump system is removed, and high-grade heat sources such as flue gas waste heat, cylinder liner water waste heat, inter-cooling water waste heat and the like can be generated due to the self-burning characteristics of the internal combustion engine, and the heat sources can be respectively utilized according to different actual conditions, so that the multi-reuse heat requirement can be met. From the energy perspective, the primary energy utilization rate of the electrically driven heat pump (EHP) is low, but the primary energy utilization rate of the Gas Heat Pump (GHP) can reach more than 90%.
In view of the development of the current heat pump system, both an electrically driven heat pump (EHP) and a Gas Heat Pump (GHP) have some problems that cannot be overcome in the practical use process. The heat generated by the engine itself in the Gas Heat Pump (GHP) can be supplied as extra heat in the heating condition, but in the cooling condition, the heat utilization is limited, and even the heat may need to be directly discharged. Electrically driven heat pumps (EHP) do not have similar problems under refrigeration conditions, but, in contrast, electrically driven heat pumps (EHP) have lower system capacity under refrigeration conditions and affect their heating continuity because of defrost conditions. From the view of fuel price, the supply and price of gas and electricity can be changed differently at different time, for example, the supply of gas is short in winter, the price is higher, the supply of electricity is short in summer, the price has the change of peak valley, etc., so that the heat pump system of single energy source is difficult to fully utilize the price change of different energy sources to achieve the maximum economic benefit. Meanwhile, due to the imbalance of energy supply, power failure can happen in summer, and unstable gas supply often happens in winter, so that the single-system energy system can not operate completely when the energy is unstable/idle.
Therefore, the technical personnel in the field are dedicated to develop a double-power double-pass driving heat pump system, so that the flexible selection of fuel gas and electric energy is realized, the economic adaptability and the system operation time are improved, and the system equipment investment is reduced.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention are: the existing single use of an electrically driven heat pump (EHP) or a Gas Heat Pump (GHP) is easily influenced by the change of gas/electricity price, and has low energy utilization rate and low economic benefit.
In order to achieve the aim, the invention provides a double-power double-pass driving heat pump system which comprises a compressor, a gas engine, a motor, a four-way valve, a shell-and-tube heat exchanger, a finned heat exchanger and an automatic control system, wherein the compressor is connected with the gas engine; the number of the compressors is two, and the compressors are respectively driven by the gas engine and the motor; the automatic control system controls the starting and stopping states of the gas engine and the motor; and after passing through the four-way valve, the refrigerant in the compressor enters the shell-and-tube heat exchanger and the finned heat exchanger to exchange heat with air.
Further, the operation modes of the heat pump system are switched through user setting or the automatic control system, and the operation modes comprise a heating mode, a refrigerating mode and a defrosting mode.
Further, the four-way valve has a state A and a state B, when the operation mode is set to the heating mode, the four-way valve is switched to the state A, the shell-and-tube heat exchanger serves as a condenser, and the finned heat exchanger serves as an evaporator; when the operation mode is set to the refrigeration mode or the defrosting mode, and the four-way valve is switched to the state B, the shell-and-tube heat exchanger serves as an evaporator, and the fin-type heat exchanger serves as a condenser.
Further, the automatic control system can control the operation mode of the heat pump system according to the actual demand of a user, wherein the actual demand of the user is set according to the change of electricity price and gas price, season and system hot water temperature.
Further, the gas engine drives the compressor through a gear box, waste heat of flue gas generated by the gas engine exchanges heat through the flue gas heat exchanger, the cylinder sleeve water heat exchanger and the inter-cooling water heat exchanger, and waste heat of the gear box is recovered through the gear box heat exchanger.
Further, the gas engine is connected with the gear box through a coupler, and the gear box is connected with the compressor through another coupler.
Further, the heat of the flue gas heat exchanger, the cylinder sleeve water heat exchanger, the inter-cooling water heat exchanger and the gear box heat exchanger is used for heating domestic water so as to solve the problem of heat supply and continuously provide hot water.
Further, an oil-gas separator is arranged between the compressor and the four-way valve, and heat of the oil-gas separator is recovered through an oil cooler.
Further, the outlet of the shell-and-tube heat exchanger is also connected with an economizer, and one outlet of the economizer is connected with the inlet of the compressor.
Further, an expansion valve is arranged between the finned heat exchanger and the other outlet of the economizer.
Compared with the prior art, the invention at least has the following beneficial technical effects:
1. according to the double-power double-pass driving heat pump system provided by the invention, when the motor or the gas engine is independently started to drive the heat pump to supply energy to the system, all advantages of the original electric driving heat pump (EHP) or Gas Heat Pump (GHP) are respectively reserved, the gas or electric driving mode can be reasonably switched according to actual conditions such as load demand, electric ladder price, electric power and gas supply and the like, gas and electric energy are optimally utilized, the continuous and stable operation of the system is ensured, and the operation cost is saved.
2. The double-power double-pass driving heat pump system provided by the invention is also provided with the heat recovery system, so that the flue gas waste heat, the cylinder sleeve water waste heat and the inter-cooling water waste heat of the gas engine can be used for heating domestic water or heating, the utilization rate of primary energy is improved on the premise of realizing energy step multi-directional application, the gas can be used as energy sources during winter operation, the heating capacity of the system is increased, and the heating comfort in winter is ensured.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of a dual power, two-pass drive heat pump system of the present invention;
wherein: 1-a gas engine; 2-an electric motor; 3, coupling; 4-a gearbox; 5-a compressor; 6-an oil-gas separator; 7-a four-way valve; 8-finned heat exchanger; 9-an expansion valve; 10-an economizer; 11-shell-and-tube heat exchanger; 12-an oil cooler; 13-flue gas heat exchanger; 14-an intercooling water heat exchanger; 15-gearbox heat exchanger; 16-cylinder liner water heat exchanger; 17-an autonomous system; 18-electric three-way valve.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
The first embodiment:
in the embodiment, a heating cycle is performed by using a gas-driven heat pump system, as shown in fig. 1, an autonomous system 17 in a system control cabinet sends a signal to a gas engine 1 to start operation according to a command, and sends a signal to a motor 2 to stop operation. The gas engine 1, the gear box 4 and the compressor 5 are transmitted through the coupling 3. The gas engine 1 is started, the natural gas and the air are sucked for combustion and power is output, the gear box 4 is in a meshing state, the power is output to the compressor 5, the refrigerant is compressed into high-temperature high-pressure gas and enters the oil-gas separator 6, the liquid refrigerant in the oil-gas separator 6 enters the oil cooler 12, the waste heat is recovered and then returns to the compressor 5 again, the refrigerant gas enters the shell-and-tube heat exchanger 11 through the four-way valve 7, the refrigerant is condensed in the shell-and-tube heat exchanger 11 to release heat and output heat to form refrigerant liquid, the refrigerant liquid reaches the expansion valve 9 through the economizer 10, the low-temperature low-pressure refrigerant is throttled according to a control signal of the automatic control system 17 and enters the fin type heat exchanger 8 to exchange heat with the air, the fin type heat exchanger 8 serves as an evaporator, returning to the compressor 5 again, the compressor 5 compresses the low-temperature and low-pressure gas again to form high-temperature and high-pressure gas, and the circulation is continued.
The waste heat of the gas engine 1 is recovered through the flue gas heat exchanger 13, the cylinder liner water heat exchanger 16 and the inter-cooling water heat exchanger 14, and the waste heat generated by the gear box 4 and the compressor 5 is respectively exchanged through the gear box heat exchanger 15 and the oil cooler 12, and can be respectively or intensively used for actual requirements of hot water, heating and the like.
Second embodiment:
in the embodiment disclosed, an electric drive heat pump system is used for heating cycle, and as shown in fig. 1, an autonomous system 17 in the system control cabinet sends a signal to the electric motor 2 to start operation according to the setting, and the gas engine 1 stops operating. The motor 2 drives the compressor 5, power is output by consuming electric power, refrigerant is compressed to form high-temperature high-pressure gas, the high-temperature high-pressure gas enters the oil-gas separator 6, liquid refrigerant enters the oil cooler 12, the waste heat is recovered and then returns to the compressor 5, the refrigerant gas enters the shell-and-tube heat exchanger 11 through the four-way valve 7, the high-temperature high-pressure gas is condensed to release heat and output heat to form refrigerant liquid, the refrigerant liquid reaches the expansion valve 9 through the economizer 10 and is throttled according to a control command of the automatic control system 17 to form low-temperature low-pressure refrigerant, the, the heat energy is absorbed from the air through the evaporation of the refrigerant to form low-temperature and low-pressure gas, the low-temperature and low-pressure gas enters the compressor 5 driven by the motor 2 through the four-way valve 7 and the electric three-way valve 18, the low-temperature and low-pressure gas is compressed by the compressor 5 to form high-temperature and high-pressure gas, and the circulation is continued.
When the system operates in winter, refrigerant liquid at the outlet of the shell-and-tube heat exchanger 11 passes through the economizer 10 and the electric three-way valve 18 and is directly sent into the compressor 5, so that the output and the efficiency of the system are improved at extremely low temperature. The waste heat generated by the compressor 5 is exchanged by the oil cooler 12, and can be used for actual requirements of hot water, heating and the like.
The third embodiment:
in the embodiment, a heat pump system performs a defrosting/refrigerating cycle, as shown in fig. 1, based on the first embodiment and the second embodiment, whether defrosting is needed or not is judged according to a difference value between a surface temperature of a finned heat exchanger 8 and an air temperature, an automatic control system 17 issues instruction information to a four-way valve 7, the four-way valve 7 is switched, and a flow direction of a refrigerant in the system is changed, so that a refrigerating mode is switched. The refrigerant is compressed by the compressor 5 to form high-temperature and high-pressure gas, enters the oil-gas separator 6, enters the finned heat exchanger 8 through the switched four-way valve 7, exchanges heat with air, is condensed in the finned heat exchanger 8 to release heat to form liquid, is subjected to flow limitation by the expansion valve 9, reduces the pressure, is sent into the shell-and-tube heat exchanger 11 to be evaporated and absorb heat, forms low-temperature and low-pressure refrigerant gas, returns to the compressor 5, and continues to circulate. The heat pump system may also operate on this cycle when the system requires refrigeration.
The waste heat of the gas engine 1 is recovered through the flue gas heat exchanger 13, the cylinder liner water heat exchanger 16 and the inter-cooling water heat exchanger 14, and the waste heat generated by the gear box 4 and the compressor 5 is respectively exchanged through the gear box heat exchanger 15 and the oil cooler 12, and can be respectively or intensively used for actual requirements of hot water, heating and the like, or directly discharged through a radiator when not needed.
The fourth embodiment:
in the present embodiment, the heat pump system performs a switching cooling and heating cycle, and as shown in fig. 1, electric three-way valves 18 are respectively provided upstream of a refrigerant inlet and a refrigerant outlet of a compressor 5 driven by a gas engine 1 to communicate with the refrigerant inlet and the refrigerant outlet of the compressor 5 driven by a motor 2. The automatic control system 17 can be freely switched according to the setting of the user, for example: the user sets up it to use gas drive refrigeration during the peak electricity in summer, prepares hot water simultaneously, uses motor drive refrigeration during flat electric valley electricity, and all utilize the gas to heat winter, and energy supply problem appears throughout the year and causes former setting unable use, then automatic switch-over to another operational mode, until manual reset. In summer peak power time range, the automatic control system 17 automatically switches to the first embodiment and the third embodiment (refrigeration), the generated waste heat is used for heating hot water before enough hot water is prepared, heat is discharged or moved to be used for other purposes after the hot water is produced, when the system is in flat power and valley power periods, the automatic control system 17 automatically switches to the second embodiment and the third embodiment (refrigeration), the system is driven by electric power to refrigerate, and a small amount of waste heat is discharged. In the winter condition, the autonomous system 17 automatically switches to the first and third embodiment (defrost). If the condition that the unit cannot be started according to the preset working requirement occurs all year round, namely the gas engine 1 or the motor 2 cannot work, the other set of energy utilization device is automatically switched.
Compared with the prior art, the double-power double-pass driving heat pump system can reasonably switch the gas or electric driving mode according to the actual conditions of load demand, electric stepped price, electric power gas supply and the like, optimally utilizes gas and electric energy, ensures continuous and stable operation of the system and saves the operation cost.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A double-power double-pass driving heat pump system is characterized by comprising a compressor, a gas engine, a motor, a four-way valve, a shell-and-tube heat exchanger, a finned heat exchanger and an automatic control system; the number of the compressors is two, and the compressors are respectively driven by the gas engine and the motor; the automatic control system controls the starting and stopping states of the gas engine and the motor; and after passing through the four-way valve, the refrigerant in the compressor enters the shell-and-tube heat exchanger and the finned heat exchanger to exchange heat with air.
2. The dual-power dual-drive heat pump system as claimed in claim 1, wherein the operation modes of the heat pump system are switched by user setting or the automatic control system, and the operation modes comprise a heating mode, a cooling mode and a defrosting mode.
3. The dual-power double-pass driven heat pump system as recited in claim 2 wherein said four-way valve has a state a and a state B, and when said four-way valve is switched to said state a when said operation mode is set to said heating mode, said shell-and-tube heat exchanger functions as a condenser and said finned heat exchanger functions as an evaporator; when the operation mode is set to the refrigeration mode or the defrosting mode, and the four-way valve is switched to the state B, the shell-and-tube heat exchanger serves as an evaporator, and the fin-type heat exchanger serves as a condenser.
4. The dual-power dual-pass driving heat pump system as claimed in claim 3, wherein the automatic control system can control the operation mode of the heat pump system according to the actual demand of the user, the actual demand of the user is set according to the change of electricity price and gas price, the season setting, and the system hot water temperature setting.
5. The dual-power double-pass driving heat pump system as claimed in claim 1, wherein the gas engine drives the compressor through a gear box, waste heat of flue gas generated by the gas engine is subjected to heat exchange through a flue gas heat exchanger, a cylinder liner water heat exchanger and an inter-cooling water heat exchanger, and waste heat of the gear box is recovered through the gear box heat exchanger.
6. The dual-power double-pass driving heat pump system as claimed in claim 5, wherein the gas engine is connected with the gear box through a coupling, and the gear box is connected with the compressor through another coupling.
7. The dual-power double-pass driving heat pump system as claimed in claim 5, wherein the heat of the flue gas heat exchanger, the cylinder liner water heat exchanger, the inter-cooling water heat exchanger and the gear box heat exchanger is used for heating domestic water so as to solve the problem of heat supply and continuously provide hot water.
8. The dual-power double-pass driving heat pump system as claimed in claim 1, wherein an oil-gas separator is further arranged between the compressor and the four-way valve, and heat of the oil-gas separator is recovered through an oil cooler.
9. The dual-power double-pass driving heat pump system as claimed in claim 1, wherein an economizer is further connected to an outlet of the shell-and-tube heat exchanger, and an outlet of the economizer is connected to an inlet of the compressor.
10. The dual-power double-pass driven heat pump system as claimed in claim 9, wherein an expansion valve is further disposed between the finned heat exchanger and the other outlet of the economizer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010244018.1A CN111412678A (en) | 2020-03-31 | 2020-03-31 | Double-power double-pass driving heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010244018.1A CN111412678A (en) | 2020-03-31 | 2020-03-31 | Double-power double-pass driving heat pump system |
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| CN111412678A true CN111412678A (en) | 2020-07-14 |
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| CN202010244018.1A Pending CN111412678A (en) | 2020-03-31 | 2020-03-31 | Double-power double-pass driving heat pump system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229096A (en) * | 2020-10-30 | 2021-01-15 | 青岛索迷尔能源科技有限公司 | Dual-air-supply enthalpy-increasing type internal combustion engine driving heat pump |
| CN112344597A (en) * | 2020-10-30 | 2021-02-09 | 青岛索迷尔能源科技有限公司 | Gas internal combustion engine power and waste heat step drive heat pump |
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| CN208651062U (en) * | 2017-12-25 | 2019-03-26 | 湖南同能机电科技有限公司 | A kind of double dynamical water pump and a kind of water source heat pump system |
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2020
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| CN2854454Y (en) * | 2005-12-06 | 2007-01-03 | 东南大学 | Mixed power gas heat pump air conditioner |
| CN104142035A (en) * | 2014-05-13 | 2014-11-12 | 上海雪森林制冷设备有限公司 | Heat recovery system |
| CN106196699A (en) * | 2016-08-23 | 2016-12-07 | 广东美的暖通设备有限公司 | Heat exchanger, heat pump and control method thereof for heat pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112229096A (en) * | 2020-10-30 | 2021-01-15 | 青岛索迷尔能源科技有限公司 | Dual-air-supply enthalpy-increasing type internal combustion engine driving heat pump |
| CN112344597A (en) * | 2020-10-30 | 2021-02-09 | 青岛索迷尔能源科技有限公司 | Gas internal combustion engine power and waste heat step drive heat pump |
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