CN111197880A - Use method of efficient energy-saving air source heat pump - Google Patents

Use method of efficient energy-saving air source heat pump Download PDF

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Publication number
CN111197880A
CN111197880A CN202010034208.0A CN202010034208A CN111197880A CN 111197880 A CN111197880 A CN 111197880A CN 202010034208 A CN202010034208 A CN 202010034208A CN 111197880 A CN111197880 A CN 111197880A
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China
Prior art keywords
heat exchanger
air source
outlet
communicated
heat pump
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Pending
Application number
CN202010034208.0A
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Chinese (zh)
Inventor
谷伟
彭章娥
白鹤鹤
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Shanghai Institute of Technology
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Shanghai Institute of Technology
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Priority to CN202010034208.0A priority Critical patent/CN111197880A/en
Publication of CN111197880A publication Critical patent/CN111197880A/en
Pending legal-status Critical Current

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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
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a use method of an efficient energy-saving air source heat pump, wherein the efficient energy-saving air source heat pump comprises a comprehensive heat supply unit, a first heat exchanger and a second heat exchanger; the method comprises the following steps: controlling the first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a first bypass pipeline so as to defrost; controlling the second heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a second bypass pipeline so as to defrost; controlling the first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a first main pipeline so as to take heat; and controlling the second heat exchanger to be communicated with the outlet of the comprehensive heat supply unit through a second main pipeline so as to take heat. The invention can avoid the shutdown of system heating and the high pressure risk of the refrigerant compression device.

Description

Use method of efficient energy-saving air source heat pump
Technical Field
The invention relates to the field of air source heat pumps, in particular to a use method of an efficient energy-saving air source heat pump.
Background
An air source heat pump is an energy-saving device which utilizes high-level energy to enable heat to flow from low-level heat source air to a high-level heat source. It is a form of heat pump. As the name implies, a heat pump, like a pump, can convert low-level heat energy (such as heat contained in air, soil and water) which cannot be directly utilized into high-level heat energy which can be utilized, thereby achieving the purpose of saving part of high-level energy (such as coal, gas, oil, electric energy and the like).
The existing air source heat pump system has the problem that a four-way valve reversing system has discontinuous heat supply high load when a defrosting mode is carried out during continuous heat supply in winter, and the specific reason is that when the temperature of a plate-fin combined heat exchanger is lower than zero in winter and the high-load heating mode is operated, a frosting layer is easily formed on fins of the plate-fin combined heat exchanger to cover, the heat exchange quantity of the plate-fin combined heat exchanger is reduced, and the working efficiency of the heat pump unit is seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for using an efficient and energy-saving air source heat pump, which can effectively improve the covering condition of a frosting layer formed on a plate-fin combined heat exchanger of the air source heat pump, thereby improving the heating capacity of a system, realizing the continuous heat supply of a unit by the air source heat pump unit under the condition of low outdoor temperature and effectively avoiding the overheating risk of a refrigerant compression device.
According to the use method of the high-efficiency energy-saving air source heat pump provided by the invention, the high-efficiency energy-saving air source heat pump comprises a comprehensive heat supply unit, a first heat exchanger and a second heat exchanger; the method comprises the following steps:
step S1: controlling the first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a first bypass pipeline so as to defrost;
step S2: controlling the second heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a second bypass pipeline so as to defrost;
step S3: controlling the first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a first main pipeline so as to take heat;
step S4: and controlling the second heat exchanger to be communicated with the outlet of the comprehensive heat supply unit through a second main pipeline so as to take heat.
Preferably, the method further comprises the following steps:
step S5: repeating the steps S1 to S4 to make the first heat exchanger and the second heat exchanger to perform defrosting alternately.
Preferably, the first heat exchanger is controlled to be communicated with the outlet of the comprehensive heat supply unit through a first bypass pipeline by controlling a first electromagnetic valve on the first bypass pipeline so as to defrost;
controlling a second electromagnetic valve positioned on a second bypass pipeline to control the second heat exchanger to be communicated with the outlet of the comprehensive heat supply unit through the second bypass pipeline so as to defrost;
controlling a first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a first main pipeline by controlling a first electronic expansion valve on the first main pipeline so as to take heat;
and controlling a second heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a second main pipeline by controlling a second electronic expansion valve on the second main pipeline so as to take heat.
Preferably, the first heat exchanger and the second heat exchanger are alternately defrosted through the interlocking control of the first solenoid valve and the second solenoid valve and the interlocking control of the first electronic expansion valve and the second electronic expansion valve.
Preferably, the method further comprises the following steps before the step S1:
step M1: preheating a refrigerant compression device of the high-efficiency energy-saving air source heat pump;
step M2: sequentially opening the first electronic expansion valve, the second electronic expansion valve, the first electromagnetic valve and the second electromagnetic valve to operate the high-efficiency energy-saving air source heat pump;
step M3: and after the defrosting signal is received, the first bypass pipeline and the second bypass pipeline are controlled to be in a normally closed state.
Preferably, when the high-efficiency energy-saving air source heat pump is closed, the method comprises the following steps:
step N1: closing the refrigerant compression device of the high-efficiency energy-saving air source heat pump;
step N2: and closing the first electromagnetic valve, the second electromagnetic valve, the first electronic expansion valve and the second electronic expansion valve.
Preferably, each defrosting time of the first heat exchanger and the second heat exchanger is set to 25 minutes.
Preferably, the outlet of the refrigerant compression device is communicated with the inlet of the integrated heating unit;
the outlet of the first heat exchanger and the outlet of the second heat exchanger are respectively communicated with the inlet of the refrigerant compressing device.
Preferably, the outlet of the first heat exchanger and the outlet of the second heat exchanger are respectively communicated with the inlet of the refrigerant compressing device through an oil separator.
Preferably, an outlet of the integrated heating unit is communicated with the first main pipeline, the first bypass pipeline, the second main pipeline and the second bypass pipeline through a dry filter.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the outdoor first heat exchanger and the outdoor second heat exchanger are controlled to be alternatively defrosted, so that the shutdown of system heating and the high-pressure risk of the refrigerant compression device are avoided.
The invention can effectively improve the covering condition of the frosting layer formed by the heat exchanger in the air source heat pump plate, thereby improving the heating capacity of the system, realizing the continuous heat supply of the air source heat pump unit under the condition of lower outdoor temperature, and effectively avoiding the overheating risk of the refrigerant compression device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts. Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a flow chart of steps of a method for using an energy-efficient air source heat pump according to an embodiment of the present invention;
FIG. 2 is a flow chart of the steps of a method for using an energy-efficient air source heat pump according to a variation of the present invention;
FIG. 3 is a flowchart of steps of a method for using the high-efficiency energy-saving air source heat pump according to the embodiment of the invention;
FIG. 4 is a flow chart of steps of a method for using the high-efficiency energy-saving air source heat pump to shut down in the embodiment of the invention;
FIG. 5 is a schematic structural diagram of an energy-efficient air source heat pump according to an embodiment of the present invention;
fig. 6 is another schematic structural diagram of the high-efficiency energy-saving air source heat pump in the embodiment of the invention.
In the figure:
1 is a refrigerant compression device; 2 is a comprehensive heat supply unit; 3 is a dry filter; 4 is a first three-way valve; 5 is a first electronic expansion valve; 6 is a first bypass pipeline; 7 is a first electromagnetic valve; 8 is a second electronic expansion valve; 9 is a second bypass pipeline; 10 is a second electromagnetic valve; 11 is a first heat exchanger; 12 is a second heat exchanger; 13 is a second three-way valve; and 14 is an oil separator with a gas-liquid separation function.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Fig. 1 is a flow chart illustrating steps of a method for using an energy-efficient air source heat pump according to an embodiment of the present invention, and as shown in fig. 1, the method for using an energy-efficient air source heat pump according to the present invention includes the following steps:
step S1: controlling the first heat exchanger 11 to be communicated with the outlet of the comprehensive heat supply unit 2 through a first bypass pipeline 6 so as to defrost;
step S2: controlling the second heat exchanger 12 to be communicated with the outlet of the integrated heating unit 2 through a second bypass pipeline 9 so as to defrost;
step S3: controlling the first heat exchanger 11 to be communicated with the outlet of the comprehensive heating unit 2 through a first main pipeline 6 so as to take heat;
step S4: and controlling the second heat exchanger 12 to be communicated with the outlet of the comprehensive heating unit 2 through a second main pipeline 9 so as to take heat.
Specifically, as shown in fig. 5 and 6, when the high-efficiency energy-saving air source heat pump provided by the present invention normally operates, the first solenoid valve 7 and the second solenoid valve 10 are normally closed, and the first electronic expansion valve 5 and the second electronic expansion valve 8 normally operate. When defrosting is carried out, the first electromagnetic valve 7 is opened, the first electronic expansion valve 5 is closed, the first electromagnetic valve 7 is controlled to be opened for 25 minutes, and heat is supplied through the first bypass pipeline 6 to defrost the first heat exchanger 11; after the first electromagnetic valve 7 is opened for 25 minutes, the second electromagnetic valve 10 is opened and the second electronic expansion valve 8 is closed, the first bypass line 6 is closed, the second heat exchanger 12 is defrosted through the second bypass line 9, and the second electromagnetic valve 10 is set in an open state for 25 minutes and then the second electronic expansion valve 8 is closed and opened.
Fig. 2 is a flowchart illustrating steps of a method for using an energy-efficient air source heat pump according to a modification of the present invention, and as shown in fig. 2, the method for using an energy-efficient air source heat pump according to the present invention further includes the following steps:
step S5: repeating the steps S1 to S4 to make the first heat exchanger 11 and the second heat exchanger 12 alternately perform defrosting.
In the embodiment of the invention, the first electromagnetic valve 7 and the second electromagnetic valve 10 are arranged for interlocking control, and the first electronic expansion valve 5 and the second electronic expansion valve 8 are arranged for interlocking control, so that the outdoor first heat exchanger and the outdoor second heat exchanger are alternately defrosted, and the shutdown of system heating and the high-pressure risk of a refrigerant compression device are avoided.
Fig. 3 is a flowchart of steps of starting a method for using an energy-efficient air source heat pump according to an embodiment of the present invention, and as shown in fig. 3, when the energy-efficient air source heat pump is started, the method includes the following steps:
step M1: preheating a refrigerant compression device 1 of the high-efficiency energy-saving air source heat pump;
step M2: sequentially opening the first electronic expansion valve 5, the second electronic expansion valve 8, the first electromagnetic valve 7 and the second electromagnetic valve 10 to operate the high-efficiency energy-saving air source heat pump;
step M3: and after the defrosting signal is received, controlling the first bypass pipeline 6 and the second bypass pipeline 9 to be in a normally closed state.
In the embodiment of the present invention, the preheating time of the refrigerant compression device is 10 minutes, and the first bypass line and the second bypass line are normally closed by controlling the first electromagnetic valve 7 and the second electromagnetic valve 10.
Fig. 4 is a flowchart of steps of a method for using an energy-efficient air source heat pump to shut down in an embodiment of the present invention, and as shown in fig. 4, when the energy-efficient air source heat pump is shut down, the method includes the following steps:
step N1: closing the refrigerant compression device of the high-efficiency energy-saving air source heat pump;
step N2: and closing the first electromagnetic valve 7, the second electromagnetic valve 10, the first electronic expansion valve 5 and the second electronic expansion valve 8.
Fig. 5 is a schematic structural diagram of an energy-efficient air source heat pump of the present invention, fig. 6 is another schematic structural diagram of an energy-efficient air source heat pump of the present invention, as shown in fig. 5 and fig. 6, the energy-efficient air source heat pump provided by the present invention includes a loop formed by connecting a refrigerant compression device 1, a comprehensive heat supply unit 2, a drying filter 3, an energy-saving module, and an oil separator 14 with a gas-liquid separation function in series in sequence:
in the embodiment of the present invention, the refrigerant compression device 1 is connected to the oil separator 14 with gas-liquid separation function and the integrated heat supply unit 2 through a four-way valve, that is, the four-way valve includes a first port, a second port, a third port and a fourth port that are communicated with each other, the first port is communicated with an inlet of the refrigerant compression device 1, the second port is communicated with an outlet of the refrigerant compression device 1, the third port is communicated with an inlet of the integrated heat supply unit 2, and the fourth port is communicated with an outlet of the oil separator 14 with gas-liquid separation function.
The outlet of the comprehensive heat supply unit 2 is communicated with the inlet of a drying filter 3, the outlet of the drying filter 3 is communicated with the inlet of an energy-saving module, and the outlet of the energy-saving module is communicated with the inlet of the oil separator 14 with the gas-liquid separation function.
In the embodiment of the invention, the energy-saving modules comprise a first energy-saving module and a second energy-saving module which are arranged in parallel, the outlets of the drying filter 3 are respectively communicated with the inlets of the first energy-saving module and the second energy-saving module through a first three-way valve 4, and the outlets of the first energy-saving module and the second energy-saving module are communicated with the inlet of the oil separator 14 with the gas-liquid separation function through a second three-way valve 13;
further, the first three-way valve is provided with a first outer sleeve layer; the first outer sleeve layer is made of stainless steel, and the second three-way valve is provided with a second outer sleeve layer; the second outer sleeve layer is made of stainless steel, and specifically, the first three-way valve 4 and the second three-way valve 13 are both outer sleeves 304 and stainless steel combined with a pure copper same-diameter three-way valve.
In the embodiment of the present invention, the first economizer module includes a first heat exchanger 11 and a first control module arranged in series, and the second economizer module includes a second heat exchanger 12 and a second control module arranged in series:
the first control module comprises a first electronic expansion valve 5 and a first electromagnetic valve 7, the first electronic expansion valve 5 is connected with the first heat exchanger 11 in series, the first electronic expansion valve 5 is arranged on a first main pipeline communicated with an inlet of the first heat exchanger 11, namely, an inlet of the first electronic expansion valve 5 is connected with an outlet of the first three-way valve 4, and an outlet of the first electronic expansion valve 5 is connected with an inlet of the first heat exchanger 11; the first electromagnetic valve 7 is connected in parallel with the first electronic expansion valve 5 through a first bypass pipeline 6, that is, an inlet of the first bypass pipeline 6 is connected with an inlet of the first electronic expansion valve 5, and an outlet of the first bypass pipeline 6 is connected with an outlet of the first electronic expansion valve 5.
The second control module comprises a second electronic expansion valve 8 and a second electromagnetic valve 10, the second electronic expansion valve 8 is connected with the second heat exchanger 12 in series, the second electronic expansion valve 8 is arranged on a second main pipeline communicated with an inlet of the second heat exchanger 12, namely, an inlet of the second electronic expansion valve 8 is connected with an outlet of the first three-way valve 4, and an outlet of the second electronic expansion valve 8 is connected with an inlet of the second heat exchanger 12; the second electromagnetic valve 10 is connected in parallel with the second electronic expansion valve 8 through a second bypass pipeline 9, that is, an inlet of the second bypass pipeline 9 is connected with an inlet of the second electronic expansion valve 8, and an outlet of the second bypass pipeline 9 is connected with an outlet of the second electronic expansion valve 8.
In the embodiment of the present invention, the first heat exchanger 11 and the second heat exchanger 12 are both air-cooled heat exchangers, preferably plate-fin heat exchangers; the comprehensive heat supply unit 2 is a water-cooling heat exchanger. The first electromagnetic valve 7 and the second electronic valve 10 adopt pilot-operated electromagnetic valves; the first electronic expansion valve 5 and the second electronic expansion valve 8 are electric electronic expansion valves. The drying filter 3 adopts a horizontal lamination type drying filter.
In the embodiment of the present invention, the refrigerant compression device 1, the integrated heat supply unit 2, the drying filter 3, the energy-saving module, and the oil separator 14 with the gas-liquid separation function are all connected by a copper tube, and the tube diameter of the copper tube should be calculated according to the heat supply load of the system.
The outlet pipe diameter of the refrigerant compression device 1 is equal to the inlet pipe diameter of the comprehensive heat supply unit 2, and the connecting pipeline is the maximum pipe diameter of the high-efficiency energy-saving air source heat pump. The outlet pipe diameter of the integrated heating unit 2 should be the same as the inlet pipe diameter of the dry filter 3.
In the embodiment, the outlet pipe diameter of the first control module should be the same as the inlet pipe diameter of the first heat exchanger 11, and the pipe diameter should be smaller than the outlet of the dry filter 3 by a standard model; similarly, the outlet pipe diameter of the second control module should be the same as the inlet pipe diameter of the second heat exchanger 12, and the pipe diameter should be smaller than the outlet of the dry filter 3 by a standard size.
In the embodiment of the invention, the outdoor first heat exchanger and the outdoor second heat exchanger are controlled to be alternatively defrosted, so that the shutdown of system heating and the high-pressure risk of a refrigerant compression device are avoided.
The invention can effectively improve the covering condition of the frosting layer formed by the heat exchanger in the air source heat pump plate, thereby improving the heating capacity of the system, realizing the continuous heat supply of the air source heat pump unit under the condition of lower outdoor temperature, and effectively avoiding the overheating risk of the refrigerant compression device.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (10)

1. The use method of the high-efficiency energy-saving air source heat pump is characterized in that the high-efficiency energy-saving air source heat pump comprises a comprehensive heat supply unit, a first heat exchanger and a second heat exchanger; the method comprises the following steps:
step S1: controlling the first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a first bypass pipeline so as to defrost;
step S2: controlling the second heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a second bypass pipeline so as to defrost;
step S3: controlling the first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a first main pipeline so as to take heat;
step S4: and controlling the second heat exchanger to be communicated with the outlet of the comprehensive heat supply unit through a second main pipeline so as to take heat.
2. The use method of the high-efficiency energy-saving air source heat pump according to claim 1, characterized by further comprising the following steps:
step S5: repeating the steps S1 to S4 to make the first heat exchanger and the second heat exchanger to perform defrosting alternately.
3. The use method of the high-efficiency energy-saving air source heat pump according to claim 1,
controlling a first electromagnetic valve positioned on a first bypass pipeline to control the first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through the first bypass pipeline so as to defrost;
controlling a second electromagnetic valve positioned on a second bypass pipeline to control the second heat exchanger to be communicated with the outlet of the comprehensive heat supply unit through the second bypass pipeline so as to defrost;
controlling a first heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a first main pipeline by controlling a first electronic expansion valve on the first main pipeline so as to take heat;
and controlling a second heat exchanger to be communicated with an outlet of the comprehensive heat supply unit through a second main pipeline by controlling a second electronic expansion valve on the second main pipeline so as to take heat.
4. The use method of the high-efficiency energy-saving air source heat pump according to claim 3,
and the first heat exchanger and the second heat exchanger are alternately defrosted through the interlocking control of the first electromagnetic valve and the second electromagnetic valve and the interlocking control of the first electronic expansion valve and the second electronic expansion valve.
5. The method for using the air source heat pump as claimed in claim 3, further comprising the following steps before the step S1:
step M1: preheating a refrigerant compression device of the high-efficiency energy-saving air source heat pump;
step M2: sequentially opening the first electronic expansion valve, the second electronic expansion valve, the first electromagnetic valve and the second electromagnetic valve to operate the high-efficiency energy-saving air source heat pump;
step M3: and after the defrosting signal is received, the first bypass pipeline and the second bypass pipeline are controlled to be in a normally closed state.
6. The use method of the energy-efficient air source heat pump according to claim 3, characterized by comprising the following steps when the energy-efficient air source heat pump is shut down:
step N1: closing the refrigerant compression device of the high-efficiency energy-saving air source heat pump;
step N2: and closing the first electromagnetic valve, the second electromagnetic valve, the first electronic expansion valve and the second electronic expansion valve.
7. The method for using the high-efficiency energy-saving air source heat pump according to claim 1, wherein each defrosting time of the first heat exchanger and the second heat exchanger is set to be 25 minutes.
8. The use method of the high-efficiency energy-saving air source heat pump according to claim 5, wherein the outlet of the refrigerant compression device is communicated with the inlet of the comprehensive heat supply unit;
the outlet of the first heat exchanger and the outlet of the second heat exchanger are respectively communicated with the inlet of the refrigerant compressing device.
9. The use method of the high-efficiency energy-saving air source heat pump according to claim 5, wherein the outlet of the first heat exchanger and the outlet of the second heat exchanger are respectively communicated with the inlet of the refrigerant compression device through oil separators.
10. The method for using the high-efficiency energy-saving air source heat pump according to claim 5, wherein an outlet of the integrated heating unit is communicated with the first main pipeline, the first bypass pipeline, the second main pipeline and the second bypass pipeline through a dry filter.
CN202010034208.0A 2020-01-13 2020-01-13 Use method of efficient energy-saving air source heat pump Pending CN111197880A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201014833Y (en) * 2007-01-24 2008-01-30 劳特斯空调(江苏)有限公司 Air source heat pump low temperature heat-production bypass system
CN101382351A (en) * 2008-10-21 2009-03-11 中南大学 Air source heat pump air conditioner and defrosting method thereof
US20140069607A1 (en) * 2012-09-13 2014-03-13 Heartswork, LLC dba EcoBuilt Efficient Buildings Energy efficient cooling and heating system
CN104132488A (en) * 2014-07-24 2014-11-05 康特能源科技(苏州)有限公司 Air source heat pump defrosting device and method
CN107763892A (en) * 2017-10-23 2018-03-06 北京建筑大学 A kind of defrosting air source heat pump system
CN209763560U (en) * 2019-04-18 2019-12-10 上海应用技术大学 Combined air-cooled heat pump system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201014833Y (en) * 2007-01-24 2008-01-30 劳特斯空调(江苏)有限公司 Air source heat pump low temperature heat-production bypass system
CN101382351A (en) * 2008-10-21 2009-03-11 中南大学 Air source heat pump air conditioner and defrosting method thereof
US20140069607A1 (en) * 2012-09-13 2014-03-13 Heartswork, LLC dba EcoBuilt Efficient Buildings Energy efficient cooling and heating system
CN104132488A (en) * 2014-07-24 2014-11-05 康特能源科技(苏州)有限公司 Air source heat pump defrosting device and method
CN107763892A (en) * 2017-10-23 2018-03-06 北京建筑大学 A kind of defrosting air source heat pump system
CN209763560U (en) * 2019-04-18 2019-12-10 上海应用技术大学 Combined air-cooled heat pump system

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