CN113899104B - Inhale engine drive air source heat pump set that tonifying qi switched - Google Patents

Inhale engine drive air source heat pump set that tonifying qi switched Download PDF

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Publication number
CN113899104B
CN113899104B CN202111386650.0A CN202111386650A CN113899104B CN 113899104 B CN113899104 B CN 113899104B CN 202111386650 A CN202111386650 A CN 202111386650A CN 113899104 B CN113899104 B CN 113899104B
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refrigerant
heat exchanger
port
heat
flue gas
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CN113899104A (en
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张小力
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Shanghai Airute Air Conditioning System Co ltd
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Shanghai Airute Air Conditioning System Co ltd
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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
    • 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
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • 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
    • 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
    • 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
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

Abstract

The invention provides an engine-driven air source heat pump unit with air suction and supply switching, which is used for producing hot water or hot air and comprises an engine, a transmission device, a compressor, a first heat exchanger, a second heat exchanger and an economizer, wherein the compressor is provided with an exhaust port, an air suction port and an air supply port, the second heat exchanger is provided with a first circulation port and a second circulation port, and the engine-driven air source heat pump unit has the characteristics that: the gas-liquid separator comprises a flue gas refrigerant heat exchanger, a first refrigerant three-way valve and a second refrigerant three-way valve, wherein the flue gas refrigerant heat exchanger is respectively connected with an air supplementing port and an air suction port through the second refrigerant three-way valve, the flue gas refrigerant heat exchanger is connected with a refrigerant of an economizer in series or in parallel, and a second flow port is respectively connected with an air exhaust port and the air suction port through the first refrigerant three-way valve.

Description

Inhale engine drive air source heat pump set that tonifying qi switched
Technical Field
The invention belongs to the technical field of heat pumps, and particularly relates to an engine-driven air source heat pump unit capable of switching air suction and supply.
Background
The boiler widely adopted at present consumes much primary energy, has high operating cost and generates a large amount of carbon emission. The air source heat pump driven by the engine has the characteristics of high efficiency, low operating cost and low carbon emission level, and the high-efficiency engine driving air source heat pump adopting biomass or solar energy to synthesize clean fuel is adopted to replace a boiler or cogeneration, so that not only can the fuel consumption be greatly reduced, but also the heat and electricity can be decoupled, and the water and heat loss of a centralized long heat supply pipeline in the northern area can be reduced. When the air source heat pump runs in an outdoor low-temperature high-humidity section, moisture in air with the temperature lower than the dew point temperature can be condensed on the outer surface of the evaporator, and if the temperature of the outer surface of the evaporator is lower than zero, the air source heat pump can frost. The frost on the surface of the evaporator affects the heat supply capacity of the air source heat pump and even normal operation of the air source heat pump, and a frost layer on the evaporator needs to be removed in time.
The air source heat pump mostly adopts the traditional defrosting mode of four-way reversing valve switching, and the method has complex pipelines and can not generate heat during defrosting. At present, the improvement of the traditional defrosting mode by adopting a bypass throttling mode or a reverse defrosting mode with refrigerant compensation and the like obtains better effect, but still has the problem that heating cannot be carried out or even refrigeration is carried out instead during defrosting. Although several defrosting modes, namely heat storage defrosting, hot gas bypass defrosting and air return heating defrosting, can solve the problem that heat cannot be generated during defrosting operation, some problems still exist, for example, a phase change material used for heat storage defrosting needs to be well matched with heat required for defrosting, and a gas-liquid separator with larger capacity needs to be arranged in a system for hot gas bypass defrosting and air return heating defrosting, so that the defrosting cost is multiplied. And these several modes can not guarantee the heating effect of unit when the defrosting, have still brought the too high problem of energy consumption when the defrosting.
The patent publication number CN112728810 previously applied by the applicant discloses an air source heat pump unit, which is provided with a gas engine, a transmission device, a compressor, a first throttle valve, a second throttle valve, a first heat exchanger, a second heat exchanger and a flue gas heat exchanger, wherein a first switching valve is arranged between the second heat exchanger and an air suction port, a second switching valve is arranged between the second heat exchanger and an air exhaust port, a third switching valve is arranged between the second heat exchanger and the flue gas heat exchanger, the first switching valve is opened, the second switching valve and the third switching valve are closed, and the unit is in a heating mode; the first switching valve is closed, the second switching valve and the third switching valve are opened, the unit is in a defrosting mode, the first switching valve and the second switching valve are used for controlling the mode switching, and defrosting can be carried out while heat supply is carried out. This patent can not realize in the non-air area that frosts under the operating mode that heats, and the flue gas waste heat is used for adding refrigerant gas and returns compressor economizer entry and realizes that the unit high efficiency moves and heat and exert oneself and improve.
The patent publication No. CN112361654A previously applied by the applicant discloses a heat pump driven by a gas engine, which comprises the gas engine, a cylinder sleeve water heat exchanger, a transmission device, a compressor, a first refrigerant heat exchanger, a second refrigerant heat exchanger, a first throttling device, a first flue gas heat exchanger and a second flue gas heat exchanger. The second flue gas heat exchanger is arranged on a first flue of the gas engine, and the refrigerant side of the second flue gas heat exchanger is connected with the refrigerant side of the economizer in series or in parallel. The high-grade flue gas waste heat discharged by the engine is directly radiated to the cylinder sleeve water through the first flue gas heat exchanger, and then is radiated to hot water or air through the cylinder sleeve water heat exchanger for direct waste heat utilization. The refrigerant is heated and gasified by the low-grade flue gas waste heat in the second flue gas heat exchanger, enters an economizer inlet of the compressor, is compressed again to improve the grade, and is used for heat dissipation through the second refrigerant heat exchanger. This patent is in the high wet region of air, can not be used for sharing air source heat exchanger heat transfer volume mode to the flue gas waste heat and realize the frostless operation.
Therefore, there is a need for a novel engine-driven air source heat pump with reasonable design, high efficiency, and capability of operating without frost or rapidly defrosting, safely and stably supplying heat, so as to at least solve the problems in the prior art.
Disclosure of Invention
The present invention is made to solve the above problems, and an object of the present invention is to provide an engine-driven air-source heat pump unit capable of switching between intake and exhaust air.
The invention provides an engine-driven air source heat pump unit with air suction and supply switching, which is used for producing hot water or hot air and comprises an engine, a transmission device, a compressor, a first heat exchanger, a second heat exchanger and an economizer, wherein the compressor is provided with an exhaust port, an air suction port and an air supply port, the second heat exchanger is provided with a first circulation port and a second circulation port, and the engine-driven air source heat pump unit has the characteristics that: the gas-gas refrigerant heat exchanger is connected with the gas supplementing port and the gas suction port through the second refrigerant three-way valve respectively, the gas-gas refrigerant heat exchanger is connected with the refrigerant of the economizer in series or in parallel, and the second flow port is connected with the gas exhaust port and the gas suction port through the first refrigerant three-way valve respectively.
The engine-driven air source heat pump unit with air suction and supply switching provided by the invention can also have the following characteristics: the flue gas refrigerant heat exchanger is provided with a neutralization tank and a spray pump, condensed water generated by heat release of the flue gas in the flue gas refrigerant heat exchanger enters the neutralization tank, and the spray pump sprays the condensed water in the neutralization tank to the flue gas refrigerant heat exchanger.
The engine driving air source heat pump unit for switching air suction and supply provided by the invention also has the following characteristics: and in the defrosting mode, the condensate pump in the neutralization tank is pumped to the smoke side of the smoke refrigerant heat exchanger by the spray pump so as to enhance heat exchange.
The engine-driven air source heat pump unit with air suction and supply switching provided by the invention can also have the following characteristics: wherein, inhale the running mode of the engine drive air source heat pump unit that the tonifying qi switches and include the mode of heating and defrosting: in the heating mode, refrigerant from the exhaust port enters the first branch and the second branch respectively after being subjected to heat release and condensation in the first heat exchanger, enters the second heat exchanger through the first branch, absorbs heat and evaporates, then flows through the first refrigerant three-way valve and returns to the compressor from the air suction port, flows through the economizer through the second branch, absorbs heat and evaporates in the flue gas refrigerant heat exchanger, and then returns to the compressor from the air supplement port through the second refrigerant three-way valve; in the defrosting mode, the refrigerant from the air outlet flows into the second heat exchanger for heat release and condensation in the first heat exchanger and the first refrigerant three-way valve, then flows into the smoke refrigerant heat exchanger through the economizer for heat absorption and evaporation, and then flows back to the compressor through the second refrigerant three-way valve after flowing back to the air suction port.
The engine-driven air source heat pump unit with air suction and supply switching provided by the invention can also have the following characteristics: during the heating mode, refrigerant from the exhaust port enters the first branch and the second branch respectively after being subjected to heat release and condensation in the first heat exchanger, enters the second heat exchanger through the first branch, absorbs heat and evaporates, then flows through the first refrigerant three-way valve, flows through the economizer through the second branch, absorbs heat and evaporates in the smoke refrigerant heat exchanger, then flows through the second refrigerant three-way valve, and converges and returns to the compressor through the air suction port.
The engine-driven air source heat pump unit with air suction and supply switching provided by the invention can also have the following characteristics: wherein the first branch is provided with a second throttle valve, and the second branch is provided with a first throttle valve.
The engine-driven air source heat pump unit with air suction and supply switching provided by the invention also has the following characteristics that: a flue gas cooling water heat exchanger, a cooling water pump, a thermostat and a radiator,
the cooling water enters the thermostat after being pressurized by the cooling water pump, flows through the flue gas cooling water heat exchanger and the engine for heating, and directly flows back to the cooling water pump when the temperature of the cooling water entering the thermostat is low; when the temperature of the cooling water entering the thermostat is high, all or part of the cooling water flows through the radiator and then flows back to the cooling water pump.
The engine-driven air source heat pump unit with air suction and supply switching provided by the invention can also have the following characteristics: the first heat exchanger and the radiator are connected in series or in parallel, hot water or hot gas enters the first heat exchanger and the radiator in sequence or respectively for heating, and cooling water is antifreeze or water.
The engine-driven air source heat pump unit with air suction and supply switching provided by the invention can also have the following characteristics: the cooling water refrigerant heat exchanger is any one of a finned coil heat exchanger, a plate-fin heat exchanger, a plate-shell heat exchanger and a sleeve heat exchanger.
The engine-driven air source heat pump unit with air suction and supply switching provided by the invention can also have the following characteristics: wherein, the material of the flue gas refrigerant heat exchanger is stainless steel.
Action and effects of the invention
According to the engine-driven air source heat pump unit (hereinafter referred to as unit), when the unit is in a heating mode, refrigerant gas discharged from the compressor is subjected to heat release and condensation in the first heat exchanger and then is divided into two paths, wherein one path of refrigerant enters the second heat exchanger to absorb heat and evaporate and then returns to the compressor through the air suction port, the other path of refrigerant successively or respectively absorbs liquid heat of the refrigerant in the economizer to evaporate, absorbs heat of flue gas in the flue gas refrigerant heat exchanger to evaporate and then returns to the compressor through the air supplement port, compared with the common air source heat pump which only uses the second heat exchanger as the evaporator and the economizer, the flue gas refrigerant heat exchanger can fully recover low-grade waste heat in the flue gas, the refrigerant flow of the air supplement port is improved, and the situation that the economizer cannot work when the unit is under low load is avoided, so that the heat supply efficiency and heat supply of the unit are improved, and the energy consumption is reduced.
In the area with high air humidity and easy frosting, the flue gas refrigerant heat exchanger is switched to be used as an evaporator, the burden of the second heat exchanger is shared, the frosting problem of the unit is avoided, air flows through the second heat exchanger without frosting, and frostless operation is realized.
When the unit is in a defrosting mode, refrigerant gas discharged from the compressor is divided into two paths, one path of the refrigerant gas flows to the first heat exchanger to release heat, the other path of the refrigerant gas flows to the second heat exchanger to release heat, and the two paths of the refrigerant gas are converged and enter the smoke refrigerant heat exchanger to absorb heat and evaporate and then return to the compressor through the air suction port. The first heat exchanger is always used as a condenser in the defrosting mode, heat can be supplied to the ambient temperature in a sufficient amount, and the problem that heat supply of a unit is unstable or heat supply cannot be performed in the defrosting mode is solved. Meanwhile, the system of the unit is not stopped when the heating mode and the defrosting mode are switched, and defrosting is synchronously realized only by accelerating the speed of the engine, so that the heat supply stability of the unit is further ensured.
In addition, the unit controls mode switching through the first refrigerant three-way valve and the second refrigerant three-way valve respectively, compared with 2 groups of 2 two-way valves, the control and equipment pipelines are simpler, the refrigerant gas resistance is reduced, the unit cost is reduced, and the unit working efficiency is improved.
In conclusion, the engine-driven air source heat pump unit has the advantages of simple equipment pipeline, high working efficiency and stable heat supply, can defrost the air source heat pump unit or realize frost-free heating operation while supplying heat, saves energy consumption, reduces cost and prolongs the service life of the equipment.
Drawings
FIG. 1 is a schematic view of the connection and flow of the main part of an engine-driven air source heat pump unit with switching between intake and air supply according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection and flow of the peripheral parts of an engine-driven air source heat pump unit with switching between intake and air supply according to an embodiment of the present invention;
FIG. 3 is a schematic view illustrating the connection and flow of the main part of an engine-driven air-source heat pump unit with air intake and supply switching according to a second embodiment of the present invention;
FIG. 4 is a schematic view showing the connection and flow of the main part of an engine-driven air source heat pump unit with air intake and supply switching according to a third embodiment of the present invention;
FIG. 5 is a schematic view showing the connection and flow of the main part of an engine-driven air source heat pump unit with air intake and supply switching according to a fourth embodiment of the present invention;
fig. 6 is a schematic connection and flow diagram of the peripheral parts of an engine-driven air source heat pump unit with air intake and air supplement switching according to the fifth embodiment of the present invention.
Description of the figure numbering: the system comprises a flue gas cooling water heat exchanger 8, an engine 10, a transmission 11, a compressor 12, an air suction port 13, an air exhaust port 14, a first heat exchanger 15, a first throttle valve 16, a flue gas refrigerant heat exchanger 17, a first pipeline 18, a first connection point 19, a second connection point 20, a second throttle valve 21, a second heat exchanger 22, a first circulation port 23, a second circulation port 24, a first switching valve 25, a second switching valve 26, a third switching valve 27, a smoke exhaust pipeline 28, an air replenishing port 29, an oil separator 30, a lubricating oil circuit 31, a drying filter 32, a first branch 34, a second branch 35, a first refrigerant three-way valve 36, a second refrigerant three-way valve 37, a fourth switching valve 38, a third heat exchanger 39, a fifth switching valve 40, a smoke exhaust port 130, a spray pump 136, a nozzle 137, a cooling water pump 138, an expansion water tank 139, a thermostat 140, a three-way catalyst 141, a drain valve 142, a water condensing port 144, a neutralization tank 145, a neutralization ball 146, and a radiator 147.
Detailed Description
In order to make the technical means, creation features, achievement objects and effects of the present invention easy to understand, the following embodiments are specifically described with reference to the accompanying drawings.
< example one >
The embodiment provides an engine-driven air source heat pump unit capable of achieving air suction and supply switching. FIG. 1 is a schematic view of the connection and flow of the main part of an engine-driven air source heat pump unit with switching between intake and air supply according to an embodiment of the present invention; fig. 2 is a schematic connection and flow diagram of the peripheral parts of an engine-driven air source heat pump unit with switching of intake and air supply according to an embodiment of the present invention.
As shown in fig. 1 and 2, the engine-driven air source heat pump unit with air intake and supply switching includes a main body and a peripheral portion. The main body part comprises an engine 10, a transmission device 11, a compressor 12, a first heat exchanger 15, a first throttle valve 16, a flue gas refrigerant heat exchanger 17, a first pipeline 18, a second throttle valve 21, a second heat exchanger 22, a first refrigerant three-way valve 36 and a second refrigerant three-way valve 37. The peripheral part comprises a flue gas cooling water heat exchanger 8, a spray pump 136, a nozzle 137, a cooling water pump 138, a thermostat 140, a three-way catalyst 141 and a radiator 147.
As shown in fig. 1, an output end of the engine 10 is connected to a compressor 12 through a transmission 11, and the compressor 12 is driven to compress refrigerant gas therein. The rotation speed of the engine 10 is continuously adjustable, and the rotation speed of the compressor 12 is adjusted according to the requirements under different operation conditions by adjusting the rotation speed of the engine 10. The engine 10 also has a smoke exhaust duct 28 capable of exhausting smoke generated during operation of the engine 10.
The engine 10 is one of a naturally aspirated or turbocharged form, and the transmission 11 is any one of a coupling, an electromagnetic clutch, a change-speed gear box, or a belt with pulleys.
The compressor 12 has a suction port 13, a discharge port 14, and a suction port 29. The refrigerant gas enters from the suction port 13 and the supplementary port 29, is compressed, and is discharged from the discharge port 14. The compressor 12 is any one of an open screw compressor, an open magnetic suspension centrifugal compressor or an open scroll compressor, and the refrigerant in the compressor 12 is any one of propane, NH3, R718, HFC32, HFC134a, HFC407C, HFC a, HFC245fa, HFC507A, HFO1234 ze, HFO1234yf or HFO1234 zf.
The first heat exchanger 15 is for supplying heat, and has a first refrigerant inlet and a first refrigerant outlet, the first refrigerant inlet communicating with the discharge port 14. The heat supply mode of the first heat exchanger 15 is hot water heat supply or hot air heat supply.
The flue gas cooling water heat exchanger 8 and the flue gas refrigerant heat exchanger 17 are sequentially arranged in the smoke exhaust pipeline 28, the flue gas of the engine 10 sequentially flows through the flue gas cooling water heat exchanger 8 and the flue gas refrigerant heat exchanger 17, so that heat is released to the cooling water and the refrigerant respectively, and the refrigerant absorbs heat from the flue gas in the smoke exhaust pipeline 28 of the engine 10 in the flue gas refrigerant heat exchanger 17 and evaporates. The cooling water absorbs heat from the flue gas in a flue gas cooling water heat exchanger 8. The cooling water is water or antifreeze.
The flue gas refrigerant heat exchanger 17 and the refrigerant side of the economizer 33 are connected in series or in parallel. In this embodiment, the flue gas refrigerant heat exchanger 17 and the refrigerant side of the economizer 33 are in series. The flue gas refrigerant heat exchanger 17 has a second refrigerant inlet and a second refrigerant outlet. The second refrigerant inlet is connected to the first refrigerant outlet through the first throttle valve 16, the second refrigerant outlet is communicated with the E2 port of the second refrigerant three-way valve 37, the D2 port of the second refrigerant three-way valve 37 is communicated with the gas replenishing port 29, and the S2 port of the second refrigerant three-way valve 37 is communicated with the suction port 13. The first throttle valve 16 is an electronic expansion valve.
The first refrigerant outlet is connected to the second refrigerant inlet by a first line 18. The first conduit 18 has a first connection point 19 and a second connection point 20, the second connection point 20 being closer to the flue gas refrigerant heat exchanger 17 than the first connection point 19.
The second heat exchanger 22 has a first circulation port 23 and a second circulation port 24. The first communication port 23 is connected to the second connection point 20 via the second throttle valve 21, and is also connected to the first connection point 19 via the third switching valve 27. The second flow port 24 communicates with the E1 port of the first refrigerant three-way valve 36, the S1 port of the first refrigerant three-way valve 36 is connected to the suction port 13, and the D1 port of the first refrigerant three-way valve 36 is connected to the discharge port 14. The second throttle 21 is an electronic expansion valve.
The first refrigerant three-way valve 36 and the second refrigerant three-way valve 37 are any of solenoid valves, electric butterfly valves, electric ball valves, and electric shutoff valves, and the first refrigerant three-way valve 36 and the second refrigerant three-way valve 37 may be single valves or valve blocks. The first refrigerant three-way valve 36 and the second refrigerant three-way valve 37 may have the same function by 2 two-way valves, respectively. The third switching valve 27 is any one of a check valve, an electromagnetic valve, an electric ball valve, or an electric cut-off valve.
As shown in fig. 2, the flue gas discharged from the engine 10 sequentially enters the flue gas cooling water heat exchanger 8 and the flue gas refrigerant heat exchanger 17 in the smoke exhaust duct 28 through the three-way catalyst 141 to release heat to the cooling water and the refrigerant, the flue gas after heat release is discharged through the smoke exhaust port 130, and the water condensed from the flue gas enters the neutralization tank 145 through the water condensation port 144. The neutralizing tank 145 is filled with a neutralizing ball 146, the neutralizing ball 146 is a zeolite substance, and neutralizes nitrogen-containing acidic substances in the condensed water, and the neutralized condensed water is discharged through an overflow port of the neutralizing tank 145 or is discharged through a drain valve 142 during maintenance. In defrost mode, the spray pump 136 pumps the condensate in the neutralization tank 145 through the nozzles 137 to the flue gas side of the flue gas refrigerant heat exchanger 17 to enhance heat exchange.
The first heat exchanger 15 and the radiator 147 are connected in series or in parallel. In this embodiment, the first heat exchanger 15 and the radiator 147 are connected in series, and hot water or hot air sequentially enters the first heat exchanger 15 and the radiator 147 for heating.
The cooling water is pressurized by the cooling water pump 138, flows through the flue gas cooling water heat exchanger 8, absorbs heat in the flue gas, flows through the cylinder liner of the engine 10, is heated, and enters the thermostat 140. When the temperature of the cooling water entering the thermostat 140 is low, the cooling water directly flows back to the cooling water pump 138; when the temperature of the cooling water entering the thermostat 140 is high, the cooling water flows back to the cooling water pump 138 after passing through the radiator 147 in whole or in part. An inlet pipeline of the cooling water pump 138 is provided with an expansion water tank 139, and the expansion water tank 139 is used for adding cooling water and keeping the pressure of the inlet of the cooling water pump 138 constant.
The flue gas refrigerant heat exchanger 17 is any one of a fin coil type heat exchanger, a plate fin type heat exchanger, a plate shell type heat exchanger and a sleeve type heat exchanger, and the flue gas cooling water heat exchanger 8 is any one of a fin coil type heat exchanger, a plate fin type heat exchanger, a plate shell type heat exchanger and a sleeve type heat exchanger. The material of the flue gas refrigerant heat exchanger 17 is stainless steel.
The air supply switching engine-driven air source heat pump unit provided by the embodiment has a heating mode and a defrosting mode, and the specific working process is as follows:
as shown in fig. 1, in the heating mode, if the air passing through the second heat exchanger 22 is in the non-frost region: the E1 port and the S1 port of the first refrigerant three-way valve 36 are communicated, the E2 port and the D2 port of the second refrigerant three-way valve 37 are communicated, the third switching valve 27 is closed, and the first throttle valve 16 and the second throttle valve 21 are normally adjusted. The engine 10 drives the compressor 12 through the transmission device 11 to compress the refrigerant gas, the compressed refrigerant gas is discharged to the first refrigerant inlet and enters the first heat exchanger 15, and the refrigerant gas releases heat and condenses in the first heat exchanger 15 to become refrigerant liquid. The refrigerant liquid discharged from the first refrigerant outlet of the first heat exchanger 15 passes through the first pipe line 18 and the first connection point 19 in this order, and is divided into two paths at the second connection point 20, which are referred to as a first branch path 34 and a second branch path 35. The first branch 34 is provided with the second throttle 21, and the second branch 35 is provided with the first throttle 16. The refrigerant in the second branch 35 is converted into a gas-liquid two-phase refrigerant by the first throttle valve 16, then enters the economizer 33 and the flue gas refrigerant heat exchanger 17 to absorb heat and evaporate, and then flows through the ports E2 and D2 of the second refrigerant three-way valve 37 and returns to the compressor 12 through the air supplement port 29. The refrigerant liquid in the first branch 34 first enters the economizer 33, then is converted into a gas-liquid two-phase refrigerant by the second throttle valve 21, then enters the second heat exchanger 22 through the first circulation port 23 to absorb heat and evaporate to be converted into a refrigerant gas, and then passes through the ports E1 and S1 of the first refrigerant three-way valve 36 and then returns to the compressor 12 through the suction port 13.
In the heating mode, if the air passing through the second heat exchanger 22 is in the frosting area. The port E1 of the first refrigerant three-way valve 36 communicates with the port S1, the port E2 of the second refrigerant three-way valve 37 communicates with the port S2, the third switching valve 27 is closed, and the first throttle valve 16 and the second throttle valve 21 are normally adjusted. The engine 10 drives the compressor 12 through the transmission 11 to compress the refrigerant gas, the compressed refrigerant gas is discharged to the first refrigerant inlet and enters the first heat exchanger 15, and the refrigerant gas releases heat and condenses in the first heat exchanger 15 to become refrigerant liquid. The refrigerant liquid discharged from the first refrigerant outlet of the first heat exchanger 15 passes through the first pipe line 18 and the first connection point 19 in this order, and is divided into two paths at the second connection point 20, which are referred to as a first branch line 34 and a second branch line 35. The refrigerant in the second branch 35 is converted into a gas-liquid two-phase refrigerant by the first throttle valve 16, then enters the economizer 33 and the flue gas refrigerant heat exchanger 17 to absorb heat and evaporate, and then flows through the second refrigerant three-way valve E2 and the second refrigerant three-way valve S2. The refrigerant liquid in the first branch passage 34 is converted into a gas-liquid two-phase refrigerant by the second throttle valve 21, enters the second heat exchanger 22 through the first flow port 23 to absorb heat, is evaporated and converted into a refrigerant gas, and then passes through the ports E1 and S1 of the first refrigerant three-way valve 36. Two refrigerant streams flowing out of the ports S1 and S2 are collected and returned to the compressor 12 through the suction port 13.
In the defrosting mode, the ports D1 and E1 of the first refrigerant three-way valve 36 are communicated with each other, the port E2 and the port S2 of the second refrigerant three-way valve 37 are communicated with each other, the third switching valve 27 is opened, the first throttle valve 16 is normally adjusted, and the second throttle valve 21 is closed. The engine 10 drives the compressor 12 through the transmission device 11 to compress the refrigerant gas and then divides the refrigerant gas into two paths, one path enters the first heat exchanger 15 through the first refrigerant inlet, the refrigerant gas releases heat in the first heat exchanger 15 and is condensed into refrigerant liquid, and the refrigerant liquid is discharged from the first refrigerant outlet; the other refrigerant gas flows into the second heat exchanger 22 through the ports D1 and E1 of the first refrigerant three-way valve 36 and the second circulation port 24, condenses into a refrigerant liquid, releases heat to the frost layer on the surface of the second heat exchanger 22 to defrost the frost layer, and then flows out of the first circulation port 23, passes through the third switching valve 27, and then two refrigerant liquids are collected at the first connection point 19. The collected refrigerant liquid flows through the second connection point 20, flows into the second branch 35, is converted into a gas-liquid two-phase refrigerant by the first throttle valve 16, then enters the economizer 33 and the flue gas refrigerant heat exchanger 17 to absorb heat and evaporate, is converted into a refrigerant gas, and then flows through the ports E2 and S2 of the second refrigerant three-way valve 37 and returns to the compressor 12 through the suction port 13.
Effect of the first embodiment
According to the engine-driven air source heat pump unit (hereinafter referred to as unit) with air intake and supply switching function in the embodiment, the engine, the compressor, the first heat exchanger, the second heat exchanger, the flue gas refrigerant heat exchanger, the flue gas cooling water heat exchanger, the first refrigerant three-way valve and the second refrigerant three-way valve are provided, so that the second heat exchanger is communicated with the air intake of the compressor in a heating mode, and the second heat exchanger is communicated with the air exhaust of the compressor in a defrosting mode. In the heating mode, after refrigerant gas discharged from the compressor releases heat and condenses in the first heat exchanger, one path of the refrigerant enters the second heat exchanger to absorb heat and evaporate, flows through the first refrigerant three-way valve and returns to the compressor through the air suction port, and the other path of the refrigerant absorbs heat and evaporates through the economizer and the smoke refrigerant heat exchanger and flexibly flows to the air supplement port or the air suction port to return to the compressor through the second refrigerant three-way valve according to whether air frosts or not, so that the situation that the economizer cannot work when the unit is under low load is avoided, and the unit heating output is improved. In the defrosting mode, refrigerant gas discharged from the compressor is divided into two paths, one path of the refrigerant gas flows to the first heat exchanger for heat release and condensation, the other path of the refrigerant gas flows to the second heat exchanger for heat release and condensation through the first refrigerant three-way valve, and the two paths of the refrigerant gas are converged, enter the economizer and the flue gas refrigerant heat exchanger for heat absorption and evaporation and then return to the compressor. The first heat exchanger is used as a condenser all the time in the heating and defrosting modes, heat can be supplied to the environment, and the problem that heat supply of a unit is unstable or heat supply cannot be carried out in the defrosting mode is solved. Meanwhile, the system of the unit is not stopped when the heating mode and the defrosting mode are switched, and defrosting is synchronously realized only by accelerating the speed of the engine, so that the heat supply stability of the unit is further ensured.
The first refrigerant three-way valve is arranged between the second heat exchanger and the air suction port of the compressor and between the second heat exchanger and the air exhaust port of the compressor, and the second refrigerant three-way valve guides the refrigerant gas flowing out of the flue gas refrigerant heat exchanger to the air supplement port or the air suction port. The unit mainly switches the control mode through 2 refrigerant three-way valves, also makes the equipment pipeline simpler to reduce refrigerant gas resistance, reduce the unit cost, improve the work efficiency of unit.
In the heating mode, the flue gas refrigerant heat exchanger can fully recover low-grade waste heat in the flue gas, and can be used as an evaporator when necessary, so that the burden of the second heat exchanger is shared, and the problem of unit frosting is alleviated or even avoided.
In conclusion, the engine-driven air source heat pump unit with air suction and supply switching has the advantages of simple equipment pipeline, high working efficiency and stable heat supply, can realize frost-free operation or defrosting of the unit while supplying heat, saves energy consumption, reduces cost and prolongs the service life of the equipment.
< example two >
Fig. 3 is a schematic connection and flow diagram of a main body of an engine-driven air source heat pump unit with air intake and supply switching according to a second embodiment of the present invention.
As shown in fig. 3, the second embodiment provides an engine-driven air source heat pump unit with air intake and supply switching function, which is different from the first embodiment in that the main body of the engine-driven air source heat pump unit with air intake and supply switching function in the present embodiment further includes an oil separator 30, a lubricating oil loop 31, and a dry filter 32. The first heat exchanger 15 of the present embodiment does not include the oil separator 30.
Other structures in this embodiment are the same as those in the first embodiment, and the same reference numerals are given to the same structures.
In fig. 3, the oil separator 30 has an oil refrigerant inlet, an oil refrigerant outlet, and a lubricating oil discharge port, the oil refrigerant inlet communicates with the exhaust port 14, the oil refrigerant outlet communicates with the first refrigerant inlet, and the lubricating oil circuit 31 communicates the lubricating oil discharge port with the compressor 12.
The refrigerant gas containing the lubricating oil enters the oil separator 30 through the oil-separated refrigerant inlet, the refrigerant gas from which the lubricating oil has been separated is discharged from the oil-separated refrigerant outlet, and the separated lubricating oil returns to the compressor 12 through the lubricating oil circuit 31.
A dry filter 32 is arranged between the first connection point 19 and the second connection point 20 for dry filtering the refrigerant flowing therethrough.
The working process of the second embodiment is basically the same as that of the first embodiment, except that:
as shown in fig. 3, in both the heating mode and the defrosting mode, the refrigerant gas discharged from the exhaust port 14 of the compressor 12 enters the oil separator 30 through the oil-separated refrigerant inlet, the oil separator 30 separates the lubricating oil in the refrigerant gas, and the separated lubricating oil returns to the compressor 12 through the lubricating oil circuit 31.
In either the heating mode or the defrosting mode, the refrigerant liquid must be dried by the dry filter 32.
Effects and effects of example two
The engine-driven air source heat pump unit (hereinafter referred to as unit) with air intake and supply switching provided in this embodiment has the same functions and effects as the unit provided in the first embodiment, and will not be described herein again.
The unit provided by the embodiment is provided with the oil separator and the lubricating oil loop, and can separate the lubricating oil in the refrigerant gas, and return the lubricating oil to the compressor for recycling, so that the cost is reduced, and the service life of the compressor is prolonged; the unit provided by the embodiment also comprises a drying filter, so that redundant moisture and impurities in the refrigerant can be removed, and the overall working efficiency and reliability of the unit are improved.
< example three >
Fig. 4 is a schematic connection and flow diagram of a main part of an engine-driven air source heat pump unit with air intake and supply switching according to a third embodiment of the present invention.
As shown in fig. 4, a third embodiment provides an engine-driven air source heat pump unit with switching between air intake and air exhaust for engine driving, which is different from the first embodiment in that the main body of the engine-driven air source heat pump unit with switching between air intake and air exhaust further includes a fourth switching valve 38, a third heat exchanger 39, and a fifth switching valve 40.
Other structures in this embodiment are the same as those in the first embodiment, and the same structures are given the same reference numerals.
In fig. 4, the first communication port 23 is connected to the second connection point 20 via the fourth switching valve 38 and the second throttle 21, and the fourth switching valve 38 is located closer to the first communication port 23 than the second throttle 21. The first circulation port 23 is also connected to the first connection point 19 via a fourth switching valve 38 and a third switching valve 27 connected in series.
The third heat exchanger 39 has a third refrigerant inlet and a third refrigerant outlet. The third refrigerant inlet is connected to the fifth switching valve 40, and then connected to the second heat exchanger 22 and the fourth switching valve 38 in parallel, one end of the parallel connection is connected to the third switching valve 27 and the second throttle valve 21, respectively, and the other end of the parallel connection is connected to the E1 port of the first refrigerant three-way valve 36, respectively. The fourth switching valve 38 and the fifth switching valve 40 are each any one of an electromagnetic valve, an electric ball valve, and an electric shutoff valve.
The working process of the third embodiment is basically the same as that of the first embodiment, except that:
the working process of the third embodiment further comprises a cooling and heating mode. In the heating mode and the defrosting mode, the fourth switching valve 38 is opened, the fifth switching valve 40 is closed, and the third heat exchanger 39 is not operated.
In the cooling and heating mode, the heating amount of the first heat exchanger 15 is Qc, the input power of the compressor is W, and the cooling amount of the third heat exchanger is Qe. The refrigeration and heating modes are as follows:
if Qc-Qe-W >0, the first throttle valve 16 is opened and the fourth switching valve 38 is closed, rejecting Qc-Qe-W heat to the flue gas refrigerant heat exchanger 17. At this time, the port E1 of the first refrigerant three-way valve 36 communicates with the port S1, the port E2 of the second refrigerant three-way valve 37 communicates with the port D2, the fifth switching valve 40 is opened, the third switching valve 27 is closed, and both the first throttle 16 and the second throttle 21 are normally adjusted. The gas engine 10 drives the compressor 12 through the transmission device 11 to compress refrigerant gas and then enters the first heat exchanger 15, the first heat exchanger 15 condenses the built-in refrigerant gas into refrigerant liquid to release heat, the refrigerant liquid is discharged from a first refrigerant outlet and then is divided into two branches, the second branch 35 passes through the first throttle valve 16 and then is converted into gas-liquid two-phase refrigerant, the gas-liquid two-phase refrigerant enters the economizer 33, the flue gas refrigerant heat exchanger 17 absorbs heat and is converted into refrigerant gas, the refrigerant gas enters the air supplementing port 29 through the ports E2 and D2 of the second refrigerant three-way valve 37, the refrigerant in the first branch 34 passes through the second throttle valve 21 and is converted into gas-liquid two-phase refrigerant, the gas-liquid two-phase refrigerant enters the third heat exchanger 39 through the fifth switching valve 40 to absorb heat and is converted into refrigerant gas, and the refrigerant gas passes through the ports E1 and S1 of the first refrigerant three-way valve 36 and then is conveyed back to the compressor 12 from the air suction port 13. The maximum heat exchange capacity of the flue gas refrigerant heat exchanger 17 in this operating state is Qy.
If Qc-Qe-W-Qy >0, the fourth switching valve 38 is opened, and the opening of the fourth switching valve 38 is adjusted to ensure that the excess heat of Qc-Qe-W-Qy is exhausted to the atmosphere through the second heat exchanger 22. The rest is the same as the working condition of the heating mode.
Effects and effects of example III
The engine-driven air source heat pump unit (hereinafter referred to as unit) with air intake and supply switching provided in this embodiment has the same functions and effects as the unit provided in the first embodiment, and will not be described herein again.
The unit that this embodiment provided does not shut down when switching heating, defrosting mode or refrigeration mode of heating, through synchronous refrigeration when the engine acceleration rate heats, has further guaranteed the stability of unit heat supply, is applicable to the occasion that has cold and hot demand simultaneously, makes the function of unit more extensive.
< example four >
Fig. 5 is a schematic connection and flow diagram of a main part of an engine-driven air source heat pump unit with air intake and supply switching according to a fourth embodiment of the present invention.
As shown in fig. 5, the fourth embodiment provides an engine-driven air source heat pump unit with air intake and supply switching function, which is different from the third embodiment in that the main body of the engine-driven air source heat pump unit with air intake and supply switching function in the present embodiment further includes an oil separator 30, a lubricating oil loop 31, and a dry filter 32. The first heat exchanger 15 of the present embodiment does not include the oil separator 30.
The other structures in this embodiment are the same as those in the embodiment, and the same reference numerals are given to the same structures.
In fig. 5, the oil separator 30 has an oil refrigerant inlet, an oil refrigerant outlet, and a lubricating oil discharge port, the oil refrigerant inlet communicates with the exhaust port 14, the oil refrigerant outlet communicates with the first refrigerant inlet, and the lubricating oil circuit 31 communicates the lubricating oil discharge port with the compressor 12.
The refrigerant gas containing the lubricating oil enters the oil separator 30 through the oil-separated refrigerant inlet, the refrigerant gas from which the lubricating oil is separated is discharged from the oil-separated refrigerant outlet, and the separated lubricating oil returns to the compressor 12 through the lubricating oil circuit 31.
The dry filter 32 is disposed between the first connection point 19 and the second connection point 20, and dry filters the refrigerant flowing therethrough.
The working process of the fourth embodiment is basically the same as that of the third embodiment, except that:
as shown in fig. 5, in both the heating mode and the defrosting mode, the refrigerant gas discharged from the exhaust port 14 of the compressor 12 needs to enter the oil separator 30 through the oil-separated refrigerant inlet, the oil separator 30 separates the lubricating oil in the refrigerant gas, and the separated lubricating oil returns to the compressor 12 through the lubricating oil circuit 31.
The refrigerant liquid must be dried by the dry filter 32 in any of the heating mode, the cooling/heating mode, and the defrosting mode.
Effects and effects of example four
The engine-driven air source heat pump unit (hereinafter referred to as unit) with air intake and supply switching provided in this embodiment has the same functions and effects as the unit provided in the third embodiment, and is not described herein again.
The unit provided by the embodiment is provided with the oil separator and the lubricating oil loop, and can separate the lubricating oil in the refrigerant gas, and return the lubricating oil to the compressor for recycling, so that the cost is reduced, and the service life of the compressor is prolonged; the unit provided by the embodiment also comprises a drying filter, so that redundant moisture and impurities in the refrigerant can be removed, and the overall working efficiency and reliability of the unit are improved.
< example five >
FIG. 6 is a schematic view showing the connection and flow of the peripheral parts of the air-intake-air-switching engine-driven air source heat pump unit shown in FIG. 1.
As shown in fig. 6, the fifth embodiment provides an engine-driven air source heat pump unit with air intake and supply switching function in engine driving, and the difference between the engine-driven air source heat pump unit with air intake and supply switching function and the first embodiment is only that: in the structure of the peripheral portion, the first heat exchanger 15 and the radiator 147 are connected in parallel. Other structures are completely the same as those of the first embodiment, and are not described herein again.
As shown in fig. 6, in this embodiment, hot water or hot air enters the first heat exchanger 15 and the radiator 147 for heating, and then converges and flows out.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides an inhale engine drive air source heat pump set that tonifying qi switched for produce hot water or hot-blast, including engine, transmission, compressor, first heat exchanger, second heat exchanger, economic ware, the compressor has gas vent, induction port and tonifying qi mouth, the second heat exchanger has first circulation mouth and second circulation mouth, its characterized in that still includes:
a flue gas refrigerant heat exchanger, a first refrigerant three-way valve and a second refrigerant three-way valve,
the flue gas refrigerant heat exchanger is respectively connected with the air supplementing port and the air suction port through the second refrigerant three-way valve,
the flue gas refrigerant heat exchanger is in series or parallel with the refrigerant side of the economizer,
the second flow port is connected to the discharge port and the suction port through the first refrigerant three-way valve,
wherein the first heat exchanger is for supplying heat, has a first refrigerant inlet and a first refrigerant outlet, the first refrigerant inlet being in communication with the discharge port; the flue gas refrigerant heat exchanger has a second refrigerant inlet and a second refrigerant outlet; the first refrigerant outlet is connected to the second refrigerant inlet by a first line having a first connection point and a second connection point thereon, the second connection point being closer to the flue gas refrigerant heat exchanger than the first connection point; the first circulation port is connected with the second connection point through a second throttle valve and is also connected with the first connection point through a third switching valve; the second flow port is communicated with an El port of the first refrigerant three-way valve, a Sl port of the first refrigerant three-way valve is connected with the suction port, a Dl port of the first refrigerant three-way valve is connected with the discharge port,
the refrigerant in the second branch is converted into gas-liquid two-phase refrigerant through the first throttling valve, then enters the economizer and the smoke refrigerant heat exchanger to absorb heat and evaporate, then flows through the E2 port and the D2 port of the second refrigerant three-way valve and returns to the compressor through the air supplementing port, and the refrigerant liquid in the first branch is connected to a pipeline between the first circulation port and the third switching valve through the second throttling valve.
2. The air intake switching engine-driven air source heat pump unit according to claim 1, wherein:
the flue gas refrigerant heat exchanger is provided with a neutralization tank and a spray pump, condensed water generated by heat release of the flue gas in the flue gas refrigerant heat exchanger enters the neutralization tank, and the spray pump sprays the condensed water in the neutralization tank to the flue gas refrigerant heat exchanger.
3. The air intake switching engine-driven air source heat pump unit according to claim 2, wherein:
and in the defrosting mode, the spray pump pumps the condensed water in the neutralization tank to the smoke side of the smoke refrigerant heat exchanger to strengthen heat exchange.
4. The air intake switching engine-driven air source heat pump unit according to claim 1, wherein:
wherein, inhale the running mode of the engine drive air source heat pump unit that the tonifying qi switches and include the mode of heating and defrosting:
in a heating mode, refrigerant from the air outlet enters a first branch and a second branch after being subjected to heat release and condensation in the first heat exchanger, enters the second heat exchanger through the first branch, absorbs heat, is evaporated, flows through the first refrigerant three-way valve, returns to the compressor from the air suction port, flows through the economizer through the second branch, absorbs heat, is evaporated in the smoke refrigerant heat exchanger, and returns to the compressor from the air supplementing port through the second refrigerant three-way valve;
in the defrosting mode, after the refrigerant from the air outlet releases heat and condenses in the first heat exchanger and the second heat exchanger through the first refrigerant three-way valve, the refrigerant flows through the economizer, enters the smoke refrigerant heat exchanger to absorb heat and evaporate, and then flows back to the compressor through the second refrigerant three-way valve after flowing back to the air suction port.
5. The air intake switching engine-driven air source heat pump unit according to claim 4, wherein:
wherein, in the heating mode,
the refrigerant from the exhaust port enters a first branch and a second branch respectively after being subjected to heat release and condensation in the first heat exchanger, enters the second heat exchanger through the first branch, absorbs heat and evaporates, then flows through the first refrigerant three-way valve, flows through the economizer through the second branch, absorbs heat and evaporates in the smoke refrigerant heat exchanger, then flows through the second refrigerant three-way valve, and is converged and then returns to the compressor from the air suction port.
6. The air intake switching engine-driven air source heat pump unit according to claim 4 or 5, wherein:
and the first branch is provided with a second throttling valve, and the second branch is provided with a first throttling valve.
7. The air intake switching engine driven air source heat pump unit according to claim 1, further comprising:
a flue gas cooling water heat exchanger, a cooling water pump, a thermostat and a radiator,
wherein the smoke of the engine sequentially enters the smoke cooling water heat exchanger and the smoke refrigerant heat exchanger so as to respectively release heat to the cooling water and the refrigerant,
the cooling water is pressurized by the cooling water pump, flows through the flue gas cooling water heat exchanger and the engine, is heated and heated, and then enters the thermostat,
when the temperature of the cooling water entering the thermostat is low, the cooling water directly flows back to the cooling water pump;
when the temperature of the cooling water entering the thermostat is high, the cooling water flows back to the cooling water pump after flowing through the radiator completely or partially.
8. The air intake switching engine-driven air source heat pump unit according to claim 7, wherein:
wherein the first heat exchanger and the radiator are connected in series or in parallel, the hot water or the hot air enters the first heat exchanger and the radiator in sequence or respectively for heating,
the cooling water is antifreeze or water.
9. The air intake switching engine-driven air source heat pump unit according to claim 1, wherein:
the flue gas refrigerant heat exchanger is any one of a fin coil type heat exchanger, a plate-fin type heat exchanger, a plate-shell type heat exchanger and a sleeve type heat exchanger.
10. The air intake switching engine-driven air source heat pump unit according to claim 1, wherein:
wherein, the material of flue gas refrigerant heat exchanger is stainless steel.
CN202111386650.0A 2021-11-22 2021-11-22 Inhale engine drive air source heat pump set that tonifying qi switched Active CN113899104B (en)

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JPH11124622A (en) * 1997-10-21 1999-05-11 Daido Steel Co Ltd Heat treatment
CN100592007C (en) * 2008-10-21 2010-02-24 中南大学 Air source heat pump type air conditioner and its defrosting method
CN103090590B (en) * 2012-12-10 2016-04-13 武汉凯龙技术开发有限责任公司 Gas engine-driven air screw source heat pump refrigerating and heating unit
CN106016811B (en) * 2014-11-05 2018-08-28 合肥工业大学 Electric automobile air conditioner heat pump system with economizer
CN105841390B (en) * 2016-03-31 2018-06-26 山东省食品发酵工业研究设计院 A kind of gas driven air source heat pump thermal power plant unit for central heating system
CN110030763A (en) * 2019-04-18 2019-07-19 蓝焰高科（天津）燃气技术有限公司 Gas engine drives steam compression type Air Resource Heat Pump Unit operation method

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