CN107655124B - Air source heat pump system of non-interrupted heat supply of defrosting - Google Patents
Air source heat pump system of non-interrupted heat supply of defrosting Download PDFInfo
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- CN107655124B CN107655124B CN201710994621.XA CN201710994621A CN107655124B CN 107655124 B CN107655124 B CN 107655124B CN 201710994621 A CN201710994621 A CN 201710994621A CN 107655124 B CN107655124 B CN 107655124B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to the technical field of air source heat pump systems, in particular to an air source heat pump system for non-intermittent defrosting heat supply, which comprises a compressor, a first reversing valve, a first heat exchanger, a one-way valve, a first electromagnetic valve, a second heat exchanger, a third electromagnetic valve and a first throttling mechanism, wherein the compressor, the first reversing valve, the first heat exchanger, the one-way valve, the first electromagnetic valve, the second heat exchanger, the third electromagnetic valve and the first throttling mechanism are sequentially arranged on a refrigerant loop; the first heat exchanger is located indoors, the second heat exchanger located outdoors is provided with a third heat exchanger in series, and a second reversing valve is arranged between the first heat exchanger and the second heat exchanger as well as between the first heat exchanger and the third heat exchanger. According to the air source heat pump system for defrosting uninterrupted heat supply, due to the fact that a set of outdoor heat exchange equipment (a third heat exchanger) is added, the heat exchange area of the outdoor heat exchanger is effectively increased, and the energy efficiency ratio of the heat pump system is improved; under the working condition of heating and defrosting in winter, the heat pump unit can realize that the defrosting process still supplies heat to the indoor space, and the indoor thermal comfort is improved.
Description
Technical Field
The invention relates to the technical field of air source heat pump systems, in particular to an air source heat pump system for defrosting non-intermittent heat supply.
Background
The air source heat pump has the advantages of wide application region range, high equipment utilization rate and the like by taking inexhaustible air as a low-level heat source. The air source heat pump performance is greatly affected by the outdoor environment. In winter, when the air source heat pump unit supplies heat to the indoor space, when the temperature of the outdoor coil pipe is lower than 0 ℃ and lower than the dew point temperature of outdoor air, the outdoor coil pipe can frost. While air source heat pump frosting has two main effects on heat pump operation: (1) large frost accumulation will reduce the evaporator heat transfer coefficient; (2) the frost formation obstructs the air flow among the coil pipes of the fins of the outdoor evaporator, and the energy loss of the fan is increased. Along with the increase of frost layers on the wall surface of the outdoor heat exchanger, the evaporation temperature of the outdoor heat exchanger is reduced, the heating capacity of a unit is reduced, the performance of a fan is attenuated, the input current is increased, the heat supply performance coefficient is reduced, and the compressor can stop running when serious, so that the unit cannot work normally. Therefore, periodic defrosting becomes a necessary measure for the air source heat pump to operate normally. At present, the commonly adopted effective defrosting mode is reverse cycle defrosting, but the defrosting mode needs to be stopped for defrosting, and the problems of insufficient low-level heat source, discontinuous heating, poor thermal comfort of indoor environment and the like exist. Therefore, in order to improve the operation stability of the system and ensure the thermal comfort of the environment, the air source heat pump system for defrosting and supplying heat discontinuously is provided.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide an air source heat pump system for non-intermittent defrosting heat supply, and aims to solve the problems that an air source heat pump in the prior art needs to be stopped during defrosting, the heating is discontinuous, the thermal comfort of the indoor environment is poor, and the running stability of the system is poor.
(II) technical scheme
In order to solve the technical problem, the invention provides an air source heat pump system for non-intermittent defrosting heat supply, which comprises a compressor, a first reversing valve, a first heat exchanger, a one-way valve, a first electromagnetic valve, a second heat exchanger, a third electromagnetic valve and a first throttling mechanism, wherein the compressor, the first reversing valve, the first heat exchanger, the one-way valve, the first electromagnetic valve, the second heat exchanger, the third electromagnetic valve and the first throttling mechanism are sequentially arranged on a refrigerant loop; the first heat exchanger is located indoors, the second heat exchanger located outdoors is provided with a third heat exchanger in series, and a second reversing valve is arranged between the first heat exchanger and the second heat exchanger as well as between the first heat exchanger and the third heat exchanger.
In one embodiment of the present invention, a second throttle mechanism is provided in parallel to the check valve.
In one embodiment of the present invention, the gas-liquid separator is disposed on a gas return line of the compressor.
In an embodiment of the present invention, a fourth electromagnetic valve and a third throttling mechanism are connected in parallel to a pipeline on which the third electromagnetic valve and the first throttling mechanism are located.
In one embodiment of the present invention, a second electromagnetic valve is provided in parallel on a pipeline on which the first electromagnetic valve, the second heat exchanger, and the third throttling mechanism are located.
In one embodiment of the present invention, a line between the third solenoid valve and the first throttling mechanism communicates with a line between the second solenoid valve and the third throttling mechanism.
In one embodiment of the present invention, a fifth electromagnetic valve is provided in parallel with the second direction changing valve.
In one embodiment of the invention, the first and second reversing valves are each four-way reversing valves.
In one embodiment of the invention, the second heat exchanger and the third heat exchanger are both located outdoors.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: 1. under the working conditions of refrigeration in summer and heating in winter, the heat exchange area of the outdoor heat exchanger is effectively increased due to the addition of a set of outdoor heat exchange equipment (a third heat exchanger), and the energy efficiency ratio of the heat pump system is improved; 2. under the working condition of heating and defrosting in winter, the heat pump unit can realize that the defrosting process still supplies heat to the indoor space, so that the indoor thermal comfort is improved; 3. outdoor air is used as a heat source in the defrosting process, and the problem that a low-level heat source is lacked in the conventional defrosting process is solved, so that the defrosting device has the characteristics of energy conservation and high defrosting safety; 4. the four-way reversing valve connected with the exhaust port of the compressor of the system only needs reversing in winter and summer, and the problem of role switching of an indoor machine and an outdoor machine as an evaporator and a condenser does not exist, so that the safety and the reliability of the system are improved.
Drawings
FIG. 1 is a schematic diagram of an air source heat pump system for non-intermittent heating of defrosting according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a refrigeration schematic of an uninterrupted heating defrosting air-source heat pump system of FIG. 1;
FIG. 3 is a schematic diagram of a heating schematic diagram of an air source heat pump system for non-intermittent heating of defrosting in FIG. 1;
FIG. 4 is a schematic diagram of a winter defrosting heating schematic of the defrosting uninterrupted heating air source heat pump system of FIG. 1;
FIG. 5 is a schematic diagram of another defrosting heating in winter of the air source heat pump system for defrosting uninterrupted heating in FIG. 1;
wherein, 1-compressor; 2-a first directional valve; 3-a first heat exchanger; 4-a second throttling mechanism; 5-a one-way valve; 6-a first solenoid valve; 7-a second solenoid valve; 8-a second directional valve; 9-a second heat exchanger; 10-a third solenoid valve; 11-a first throttle mechanism; 12-a fourth solenoid valve; 13-a third throttling mechanism; 14-a third heat exchanger; 15-a fifth solenoid valve; 16-gas-liquid separator.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; "notched" means, unless otherwise stated, a shape other than a flat cross-section. The terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Referring to fig. 1 to 5, the present invention provides an air source heat pump system for non-intermittent heating during defrosting, which includes a compressor 1, a first reversing valve 2, a first heat exchanger 3, a check valve 5, a first electromagnetic valve 6, a second heat exchanger 9, a third electromagnetic valve 10, and a first throttling mechanism 11, which are sequentially disposed on a refrigerant loop; the first heat exchanger 3 is located indoors, the second heat exchanger 9 located outdoors is provided with a third heat exchanger 14 in series, and a second reversing valve 8 is arranged between the first heat exchanger 3 and the second heat exchanger 9 as well as between the first heat exchanger and the third heat exchanger 14. The check valve 5 is provided with a second throttling mechanism 4 in parallel. A fourth electromagnetic valve 12 and a third throttling mechanism 13 are arranged in parallel on a pipeline where the third electromagnetic valve 10 and the first throttling mechanism 11 are located. And a second electromagnetic valve 7 is arranged in parallel on a pipeline where the first electromagnetic valve 6, the second heat exchanger 9 and the third throttling mechanism 13 are arranged. A line between the third solenoid valve 10 and the first throttling mechanism 11 communicates with a line between the second solenoid valve 7 and the third throttling mechanism 13. The second reversing valve 8 is provided with a fifth electromagnetic valve 15 in parallel.
Compared with the prior art, the air source heat pump system for defrosting uninterrupted heat supply has the following advantages: 1. under the working conditions of refrigeration in summer and heating in winter, the heat exchange area of the outdoor heat exchanger is effectively increased due to the addition of a set of outdoor heat exchange equipment (a third heat exchanger), and the energy efficiency ratio of the heat pump system is improved; 2. under the working condition of heating and defrosting in winter, the heat pump unit can realize that the defrosting process still supplies heat to the indoor space, so that the indoor thermal comfort is improved; 3. outdoor air is used as a heat source in the defrosting process, so that the problem that a low-level heat source is lacked in the conventional defrosting process is solved, and the defrosting device has the characteristics of energy conservation and high defrosting safety; 4. the four-way reversing valve connected with the exhaust port of the compressor of the system only needs reversing in winter and summer, and the problem of role switching of an indoor machine and an outdoor machine as an evaporator and a condenser does not exist, so that the safety and the reliability of the system are improved.
The system realizes 3 operation modes of normal cooling, normal heating and defrosting heating by switching the on and off of the first reversing valve 2, the second reversing valve 8, the first electromagnetic valve 6, the second electromagnetic valve 7, the third electromagnetic valve 10, the fourth electromagnetic valve 12 and the fifth electromagnetic valve 15. When the heat pump is used for supplying cold in summer and supplying heat normally in winter, the outdoor heat exchangers (the second heat exchanger 9 and the third heat exchanger 14) which are provided with the fans can ensure that the heat pump has a larger outdoor heat exchange area, so that the efficient operation of the refrigerating and heating working conditions is ensured. When the heat pump supplies heat to the outdoor heat exchanger in winter and needs defrosting, the second reversing valve 8 and the electromagnetic valve thereof can realize that the indoor heat exchanger (the first heat exchanger 3) and the equipped fan dissipate heat to the indoor, one of the second heat exchanger 9 equipped with the fan and the third heat exchanger 14 equipped with the fan is defrosted by using the supercooled refrigerant liquid from the indoor heat exchanger (the first heat exchanger 3), and the other one is used as an evaporator to take heat from the outdoor environment. Therefore, the system can realize normal heating and normal refrigeration, can realize the non-interrupted heat supply of the heat pump to the building in the defrosting period, and ensures the running stability of the system and the indoor thermal comfort.
As a specific embodiment of the defrosting air source heat pump system provided by the present invention, the defrosting air source heat pump system further includes a gas-liquid separator 16, and the gas-liquid separator 16 is disposed on the return air pipeline of the compressor 1.
As a specific embodiment of the defrosting air source heat pump system provided by the invention, the first reversing valve 2 and the second reversing valve 8 are both four-way reversing valves. The four-way reversing valve connected with the air outlet of the compressor of the system only needs to be reversed in winter and summer, and the problem of role switching of an indoor unit and an outdoor unit as an evaporator and a condenser does not exist, so that the safety and the reliability of the system are improved.
As a specific embodiment of the defrosting air source heat pump system provided by the present invention, both the second heat exchanger 9 and the third heat exchanger 14 are located outdoors. Because a set of outdoor heat exchange equipment (a third heat exchanger) is added, the heat exchange area of the outdoor heat exchanger is effectively increased, and the energy efficiency ratio of the heat pump system is improved.
The invention relates to an air source heat pump system for defrosting and non-intermittent heat supply, which is operated under different working conditions:
1. normal refrigeration mode in summer
Referring to fig. 2, the first solenoid valve 6 is closed. The system operates as follows: the refrigerant from the compressor 1 is split into two paths from the refrigerant flow direction by passing through the first direction changing valve 2. One path of the heat flows through a fifth electromagnetic valve 15, enters a third heat exchanger 14 provided with a fan, is condensed and released, then flows through a fourth electromagnetic valve 12, the other path of the heat flows through a second reversing valve 8, enters a second heat exchanger 9 provided with a fan, is condensed and released, then flows through a third electromagnetic valve 10, is converged at an inlet of a second electromagnetic valve 7, flows through a second throttling mechanism 4 together for throttling and pressure reduction, absorbs heat at a first heat exchanger 3 provided with a fan, then sequentially flows through a first reversing valve 2 and a gas-liquid separator 16, and finally returns to the compressor 1 to be compressed again.
2. Winter normal heating mode
Referring to fig. 3, the first solenoid valve 6, the third solenoid valve 10, and the fourth solenoid valve 12 are closed. The system operates as follows: refrigerant from a compressor 1 flows through a first reversing valve 2, enters a first heat exchanger 3 provided with a fan, is condensed and releases heat, then sequentially flows through a one-way valve 5 and a second electromagnetic valve 7, and is divided into two paths from the flow direction of the refrigerant. One path of the air flow is throttled and depressurized by a third throttling mechanism 13, absorbs heat in a second heat exchanger 9 provided with a fan, and then sequentially flows through a second reversing valve 8 to one end of a fifth electromagnetic valve 15; the other path of the refrigerant flows through the first throttling mechanism 11 for throttling and pressure reduction, absorbs heat in a third heat exchanger 14 provided with a fan, flows through a fifth electromagnetic valve 15, is combined, then flows through the first reversing valve 2 and the gas-liquid separator 16 together, and finally returns to the compressor 1 to be compressed again.
3. Winter defrosting heating mode A (second heat exchanger 9 defrosting)
Referring to fig. 4, the second solenoid valve 7, the fourth solenoid valve 12, and the fifth solenoid valve 15 are closed. The inlet end of the second heat exchanger 9 is in communication with the outlet end of the first solenoid valve 6, and the system operates as follows: the refrigerant from the compressor 1 flows through the first reversing valve 2, enters the first heat exchanger 3 provided with the fan to be condensed and released heat to be supercooled refrigerant, then sequentially flows through the one-way valve 5, the first electromagnetic valve 6 and the second reversing valve 8, then enters the second heat exchanger 9 provided with the fan to release heat and defrost, then flows through the third electromagnetic valve 10, is throttled by the first throttling mechanism 11 to reduce pressure and temperature, enters the third heat exchanger 14 provided with the fan to absorb heat from the outdoor environment, sequentially flows through the second reversing valve 8 and the gas-liquid separator 16, and finally returns to the compressor 1 to be compressed again.
4. Winter defrosting heating mode B (defrosting third heat exchanger 14)
As described with reference to fig. 5, the second solenoid valve 7, the third solenoid valve 10, and the fifth solenoid valve 15 are closed. The inlet end of the third heat exchanger 14 is in communication with the outlet end of the first solenoid valve 6, and the system operates as follows: the refrigerant from the compressor 1 flows through the first reversing valve 2, enters the first heat exchanger 3 provided with the fan to be condensed and released heat to be supercooled refrigerant, then sequentially flows through the check valve 5, the first electromagnetic valve 6 and the second reversing valve 8, enters the third heat exchanger 14 provided with the fan to release heat and defrost, then flows through the fourth electromagnetic valve 12, throttles in the third throttling mechanism 13, reduces the pressure and the temperature, enters the second heat exchanger 9 provided with the fan to absorb heat from the environment, then sequentially flows through the second reversing valve 8, the first reversing valve 2 and the gas-liquid separator 16, and finally returns to the compressor 1 to be compressed again.
The invention provides an air source heat pump system for defrosting non-interrupted heat supply, which has the following technical effects: (1) Under the working conditions of refrigeration in summer and heating in winter, the heat exchange area of the outdoor heat exchanger is effectively increased due to the addition of a set of outdoor heat exchange equipment (the third heat exchanger 14), and the energy efficiency ratio of the heat pump system is improved; (2) Under the working condition of heating and defrosting in winter, the heat pump unit can realize that the defrosting process still supplies heat to the indoor space, so that the indoor thermal comfort is improved; (3) The traditional air source heat pump lacks a low-level heat source, so that the defrosting period is long, the energy consumption is high (defrosting heat mainly comes from a compressor), and even the safety problem of the operation of the heat pump is brought. The system substantially takes outdoor air as a heat source in the defrosting process, and overcomes the problem that the prior defrosting lacks a low-level heat source, so the system has the characteristics of energy conservation and high defrosting safety; (4) The traditional defrosting is realized by reversing through a four-way reversing valve connected with an exhaust port of a compressor, the roles of an indoor unit and an outdoor unit as an evaporator and a condenser are switched, so that the refrigerant and lubricating oil are frequently and heavily distributed in the system, and the reversing frequency of the four-way reversing valve is high. The four-way reversing valve connected with the air outlet of the compressor of the system only needs to be reversed in winter and summer, and the problem of role switching of an indoor unit and an outdoor unit as an evaporator and a condenser does not exist, so that the safety and the reliability of the system are improved.
The system can realize normal heating and normal refrigeration, can realize the heat pump to supply heat to the building in a non-interrupted manner in the defrosting time period, ensures the running stability of the system and the indoor thermal comfort, can promote the application of the non-interrupted defrosting air source heat pump system in the field of domestic buildings, provides theoretical support and technical reserve for creating high-efficiency and high-comfort building space, makes contribution to the energy conservation and emission reduction of the buildings in cities and rural areas in China, and has very important practical significance.
Finally, the scheme of the invention can also effectively avoid the influence of (1) water vapor evaporated by melted frost on frosting of other branches; (2) the influence of the low falling of the defrosting water and the like on other branches; (3) The influence of air streaming and the like on the defrosting speed of the defrosting pipeline; (4) Heat loss due to heat transfer between the defrosting branch and the non-defrosting branch. In addition, the configuration mode of the independent double-chamber external heat exchanger has the advantages that the fan can be independently controlled, and the regulation and control are convenient.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (5)
1. An air source heat pump system for non-intermittent heating during defrosting is characterized by comprising a compressor (1), a first reversing valve (2), a first heat exchanger (3), a one-way valve (5), a first electromagnetic valve (6), a second heat exchanger (9), a third electromagnetic valve (10) and a first throttling mechanism (11) which are sequentially arranged on a refrigerant loop; the first heat exchanger (3) is located indoors, a third heat exchanger (14) is arranged on the second heat exchanger (9) located outdoors in series, and a second reversing valve (8) is arranged between the first heat exchanger (3) and the second heat exchanger (9) as well as between the first heat exchanger and the third heat exchanger (14); a fourth electromagnetic valve (12) and a third throttling mechanism (13) are arranged on a pipeline where the third electromagnetic valve (10) and the first throttling mechanism (11) are located in parallel, a second electromagnetic valve (7) is arranged on a pipeline where the first electromagnetic valve (6), the second heat exchanger (9) and the third throttling mechanism (13) are located in parallel, a pipeline between the third electromagnetic valve (10) and the first throttling mechanism (11) is communicated with a pipeline between the second electromagnetic valve (7) and the third throttling mechanism (13), and a fifth electromagnetic valve (15) is arranged on the second reversing valve (8) in parallel.
2. A defrosting uninterrupted heating air source heat pump system according to claim 1, wherein a second throttling mechanism (4) is arranged on the one-way valve (5) in parallel.
3. A defrosting uninterrupted-heat-supply air-source heat pump system according to claim 1, further comprising a gas-liquid separator (16), wherein the gas-liquid separator (16) is arranged on a return air pipeline of the compressor (1).
4. A defrosting uninterrupted heating source air-source heat pump system according to any one of the claims 1 to 3, wherein the first reversing valve (2) and the second reversing valve (8) are both four-way reversing valves.
5. A defrosting uninterrupted heating air-source heat pump system according to claim 4, wherein the second heat exchanger (9) and the third heat exchanger (14) are both located outdoors.
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| CN201710994621.XA CN107655124B (en) | 2017-10-23 | 2017-10-23 | Air source heat pump system of non-interrupted heat supply of defrosting |
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| CN201710994621.XA CN107655124B (en) | 2017-10-23 | 2017-10-23 | Air source heat pump system of non-interrupted heat supply of defrosting |
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| CN107655124B true CN107655124B (en) | 2023-03-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108362032A (en) * | 2018-04-04 | 2018-08-03 | 北京卡林新能源技术有限公司 | A kind of net for air-source heat pump units of continuous heat supply |
| CN111189263A (en) * | 2020-01-13 | 2020-05-22 | 上海应用技术大学 | High-efficiency energy-saving air source heat pump |
| IT202000007202U1 (en) * | 2021-01-02 | 2022-07-02 | Cristiano Paoletti | Improvement of system and liquid reverse defrost method |
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| CN105066255A (en) * | 2015-09-01 | 2015-11-18 | 珠海格力电器股份有限公司 | Air conditioning system with continuous heat supply function in defrosting process |
| CN205065908U (en) * | 2015-09-01 | 2016-03-02 | 珠海格力电器股份有限公司 | Air conditioning system that defrosting in -process has lasting heat supply function |
| CN207438787U (en) * | 2017-10-23 | 2018-06-01 | 北京建筑大学 | A kind of air source heat pump system of the non-interruption heat supply of defrosting |
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| CN200955881Y (en) * | 2006-01-05 | 2007-10-03 | 南京天加空调设备有限公司 | Continuous defrosting and heating air source heat pump |
| CN103712370A (en) * | 2013-12-23 | 2014-04-09 | 南京迪泽尔空调设备有限公司 | Air source heat pump system |
| CN104832989A (en) * | 2015-04-29 | 2015-08-12 | 广东美的制冷设备有限公司 | Air conditioner and control method for air conditioner |
| CN105066255A (en) * | 2015-09-01 | 2015-11-18 | 珠海格力电器股份有限公司 | Air conditioning system with continuous heat supply function in defrosting process |
| CN205065908U (en) * | 2015-09-01 | 2016-03-02 | 珠海格力电器股份有限公司 | Air conditioning system that defrosting in -process has lasting heat supply function |
| CN207438787U (en) * | 2017-10-23 | 2018-06-01 | 北京建筑大学 | A kind of air source heat pump system of the non-interruption heat supply of defrosting |
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| CN107655124A (en) | 2018-02-02 |
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