CN112984643A - Outdoor unit anti-frosting device of air source heat pump air conditioner - Google Patents
Outdoor unit anti-frosting device of air source heat pump air conditioner Download PDFInfo
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- CN112984643A CN112984643A CN202110271028.9A CN202110271028A CN112984643A CN 112984643 A CN112984643 A CN 112984643A CN 202110271028 A CN202110271028 A CN 202110271028A CN 112984643 A CN112984643 A CN 112984643A
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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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
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/873—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling refrigerant heaters
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Gases (AREA)
Abstract
The invention provides an outdoor unit anti-frosting device of an air source heat pump air conditioner, which comprises a reproducible adsorption thin plate and a fan with a reverse rotation function. The renewable adsorption thin plate is arranged between the air inlet of the outdoor unit and the outdoor heat exchanger, and the fan is arranged between the outdoor heat exchanger and the air outlet of the outdoor unit. The renewable adsorption sheet is internally compacted and filled with granular renewable adsorption materials, and the electrical heating metal pipe is embedded in the renewable adsorption materials. During working, the renewable adsorption material absorbs moisture in air, reduces the moisture content of the air and avoids frosting when the air exchanges heat with the outdoor unit; when the adsorption sheet that can regenerate absorbs water saturation, through the heating of electrical heating tubular metal resonator, the reversal of cooperation fan blows the environment to the moisture that is heated desorption in the adsorption material that can regenerate, accomplishes the regeneration of the adsorption sheet that can regenerate, later the circulation gets into once more and adsorbs the dehumidification process. In this application, through the reproducible absorption sheet metal of installation and the fan that can reverse operation at outdoor unit air intake department, just reach the purpose that the frosting was prevented in the dehumidification.
Description
Technical Field
The invention relates to the field of frosting prevention of an air source heat pump outdoor unit, and discloses a method and a device for preventing frosting of the air source heat pump outdoor unit.
Background
In some wet and cold areas, when the outdoor temperature is lower than 5 ℃ in winter, the evaporation temperature of the outdoor heat exchanger of the air source heat pump air conditioner is reduced to be lower than 0 ℃. Since the evaporation temperature is lower than the freezing point temperature of water, water vapor in the ambient air is firstly condensed into water drops when contacting the surface of the heat exchanger of the air source heat pump outdoor unit, and then is frozen into frost. With the operation of the outdoor unit, the more the frost is accumulated, if the frost is not processed in time, the heat exchange performance of the heat exchanger is reduced, the evaporation temperature is further reduced, and the frosting condition is continuously worsened. The existence of the frost layer not only greatly reduces the heat exchange effect of the outdoor heat exchanger, but also severely restricts the heating capacity of the heat pump air conditioner, and can lead the air source heat pump air conditioner to be incapable of operating in severe cases. Therefore, the method has very important significance for preventing the frosting of the outdoor heat exchanger of the air source heat pump.
At present, the methods commonly used for preventing the air source heat pump outdoor unit from frosting mainly include the following methods:
1. the reverse circulation defrosting method is also called as reversing defrosting method, and is a defrosting mode generally adopted at present. The principle is as follows: the four-way reversing valve is used for reversing and changing the flowing direction of the refrigerant, so that the action of the outdoor heat exchanger is changed from heat absorption to heat release, and the frost layer on the surface of the heat exchanger is heated, melted and fallen by the heat released by the outdoor unit, thereby achieving the aim of defrosting. See publication No. CN 102141330A.
However, when the air source heat pump enters the defrosting mode, the compressor is frequently started and stopped, the four-way valve is frequently reversed, and system pressure fluctuation is easily caused, so that the system is frequently subjected to large mechanical impact, and the service life of the system is shortened. And when switching back to the heating mode, the system needs a longer time to be stable, resulting in large indoor temperature fluctuation and poor user comfort experience.
2. The bypass defrosting method is also called sensible heat defrosting method, and the working principle is to directly utilize the exhaust heat of the compressor to defrost. When defrosting is carried out, the air conditioning system opens the bypass two-way valve, part of high-temperature refrigerant steam at the outlet of the compressor is introduced into the bypass loop, the bypass loop is communicated to the surface of the outdoor heat exchanger, and the high-temperature refrigerant steam releases heat in the bypass tube, so that a frost layer on the surface of the outdoor heat exchanger is heated and melted. See publication CN 101532705.
However, in the defrosting mode, the air conditioning system divides a part of the high-temperature refrigerant vapor discharged from the compressor and introduces the high-temperature refrigerant vapor into the room, so that the heat supplied by the bypass pipe during defrosting is insufficient, the defrosting time is further prolonged, and the defrosting effect cannot be ensured.
3. The phase-change energy-storage defrosting method is to add a phase-change energy-storage device in an air-conditioning system. The phase change energy storage device stores heat generated by the air conditioning unit during normal high-efficiency operation. When the defrosting mode is started, the phase change energy storage device releases the stored heat to part of the refrigerant, so that the refrigerant absorbing the phase change heat enters the heat exchanger of the outdoor unit of the air conditioner to be used as a low-temperature heat source for defrosting operation, the temperature of the heat exchanger of the outdoor unit of the air conditioner is increased, and the defrosting purpose is achieved. See publication CN 101413744.
However, an energy storage device is required to be added in the air source heat pump air conditioner system. In addition, the compressor and the outdoor heat exchanger need to be connected through a defrosting exhaust pipeline and a defrosting return pipeline to form a defrosting loop, and the defrosting exhaust pipeline and the defrosting return pipeline both need to penetrate through the heat storage device. This results in a complex system structure and increased investment costs.
4. The electric heating defrosting method is characterized in that an electric heating device is additionally arranged on a heat exchanger of an outdoor unit of an outdoor air conditioner, and during defrosting, electric heating is electrified to generate a large amount of heat so that a frost layer on the surface of the heat exchanger is melted. See publication No. CN 104089443A.
However, during defrosting, electricity is directly used to generate heat, so that electricity consumption is high, efficiency is low, and a large amount of energy is wasted.
Disclosure of Invention
The invention provides a device for preventing an air source heat pump outdoor unit from frosting, which aims at the problem of frosting of the air source heat pump air-conditioner outdoor unit and the defects of the prior art, and provides a simpler and easier frosting prevention method for the air source heat pump to operate in winter.
The invention provides an outdoor unit anti-frosting device of an air source heat pump air conditioner, which comprises an outdoor unit, wherein an outdoor unit air inlet and an outdoor unit air outlet are formed in the outer side of the outdoor unit, and a fan, an outdoor heat exchanger and a reproducible adsorption thin plate are arranged in the outdoor unit; the fan can be operated in a forward direction and a reverse direction; the renewable adsorption sheet is arranged between the air inlet of the outdoor unit and the outdoor heat exchanger, and the fan is arranged between the outdoor heat exchanger and the air outlet of the outdoor unit;
the renewable adsorption sheet comprises an electric heating metal pipe and a renewable adsorption material, the renewable adsorption sheet is filled with the renewable adsorption material, and the electric heating metal pipe is embedded inside the renewable adsorption sheet.
Further, in the outdoor unit anti-frosting device of the air source heat pump air conditioner, the renewable adsorption thin plate further comprises a thin plate frame and a mesh screen, the thin plate frame is used as a support carrier of the renewable adsorption material, and the mesh screen is fixed on the thin plate frame and coated on the outer side of the renewable adsorption material.
Further, in the outdoor unit frost prevention device of the air source heat pump air conditioner, the sheet frame is processed by glass fiber or heat-resistant ceramic material.
Further, in the outdoor unit anti-frosting device of the air source heat pump air conditioner, the thin plate frame is fixed between the outdoor unit air inlet and the outdoor unit heat exchanger through a mounting positioning hole.
Further, in the outdoor unit anti-frosting device of the air source heat pump air conditioner, the renewable adsorption thin plate is a thin plate formed by compacting and filling a plurality of granular renewable adsorption materials, at least one electric heating metal pipe is uniformly embedded in the renewable adsorption thin plate, and the electric heating metal pipe is fully contacted with the renewable adsorption materials.
Furthermore, in the outdoor unit anti-frosting device of the air source heat pump air conditioner, the renewable adsorption material has the functions of low-temperature water adsorption and high-temperature water desorption, and the chemical property of the material is stable.
Further, in the outdoor unit anti-frosting device of the air source heat pump air conditioner, the renewable adsorption material is one or a combination of more of a molecular sieve, activated alumina, calcium sulfate, activated anhydrous copper sulfate, silica gel, lithium chloride or modified silica gel.
Compared with the prior art, the invention has the following beneficial effects: the problem of frosting caused by overlarge air humidity on the surface of an outdoor heat exchanger during the heating cycle of an air source heat pump is solved by adopting a renewable adsorption thin plate made of a renewable adsorption material and a plurality of electric heating metal pipes. Structurally, only through installing a renewable adsorption thin plate at the air inlet of the heat pump evaporator and matching with a fan with a reverse operation function, other changes are not needed, the purposes of humidity reduction and frost prevention are achieved, and the heat pump evaporator is simple in structure, convenient to modify and high in feasibility.
The method has the advantages that the formation of the frost layer is avoided from the source by absorbing the moisture in the air by the renewable adsorption material to destroy the formation condition of the frost layer in principle, and the problems of poor heat exchange performance, insufficient heating capacity and the like of the outdoor heat exchanger of the air source heat pump due to frosting are solved; in the dehumidification and anti-frosting process, the heat pump system can normally supply heat for users, the problems that indoor heat supply is unstable and the user comfort level experience is poor due to the defrosting process in the traditional defrosting mode are solved, and the problem that a large amount of water is accumulated due to defrosting of an outdoor unit can be prevented. In addition, the electric heating metal pipe is directly embedded in the renewable adsorption material and is in uniform contact with the renewable adsorption material, and the heat generated by electric heating is fully utilized to heat the renewable adsorption material, so that the moisture in the renewable adsorption material is effectively precipitated.
Drawings
FIG. 1 is a schematic view of the mounting structure of the regenerable adsorbent sheet of the present invention;
fig. 2 is an isometric cross-sectional schematic view of a regenerable adsorbent sheet of the present invention.
Wherein: 1-compressor, 2-fan, 3-outdoor heat exchanger, 4-electric heating metal tube, 5-renewable adsorption material, 6-four-way reversing valve, 7-renewable adsorption thin plate, 8-air conditioner indoor unit, 9-outdoor unit air inlet, 10-outdoor unit air outlet, 11-mesh screen, 12-thin plate frame and 13-installation positioning hole.
Detailed Description
The outdoor unit frost prevention apparatus of an air-source heat pump air conditioner according to the present invention will be described in more detail with reference to the accompanying schematic drawings, in which preferred embodiments of the present invention are shown, it being understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As shown in fig. 1, the present invention provides an outdoor unit anti-frosting device of an air source heat pump air conditioner, which includes an outdoor unit and an air conditioning indoor unit 8, wherein an outdoor unit air inlet 9 and an outdoor unit air outlet 10 are arranged on the outer side of the outdoor unit, a fan 2, an outdoor heat exchanger 3, a reproducible adsorption thin plate 7, a compressor 1 and a four-way reversing valve 6 are arranged inside the outdoor unit, the compressor 1 is respectively connected with the outdoor heat exchanger 3 and the air conditioning indoor unit 8 through the four-way reversing valve 6, and the fan 2 has a reverse operation function, and can operate in both forward and reverse directions.
The reproducible absorption sheet 7 is arranged between the air inlet 9 of the outdoor unit of the air conditioner and the outdoor heat exchanger 3, and the fan 2 with the reverse rotation capacity is arranged between the heat exchanger 3 of the outdoor unit and the air outlet 10 of the outdoor unit. The installation of the renewable absorption thin plate 7 completely interrupts the direct contact between the outside air and the outdoor heat exchanger 3, and ensures that all the air sucked from the air inlet 9 of the air conditioner outdoor unit passes through the renewable absorption thin plate 7 for dehumidification and drying.
As shown in fig. 2, the regenerable adsorbent sheet 7 includes a sheet frame 12, a mesh screen 11, an electrically heated metal tube 4 and a regenerable adsorbent 5, the sheet frame 12 is used as a support carrier of the regenerable adsorbent 5, the sheet frame 12 is supported and set up at an outer side of the regenerable adsorbent 5, and the mesh screen 11 is fixed on the sheet frame 12 and covers the regenerable adsorbent 5 to prevent the shattered regenerable adsorbent 5 from falling. Sufficient granular renewable adsorbing materials 5 are compacted and filled in the renewable adsorbing thin plates 7, and the electric heating metal pipes 4 are uniformly embedded in the renewable adsorbing thin plates 5.
Further, in the outdoor unit frost prevention device of the air source heat pump air conditioner, the thin plate frame 12 has the functions of heat isolation, fixation and support and is made of glass fiber or heat-resistant ceramic materials, the edge of the thin plate frame 12 is provided with the installation positioning hole 13, and the reproducible absorption thin plate 7 is fixed between the outdoor unit air inlet 9 and the outdoor unit heat exchanger 3 through the installation positioning hole 13.
Further, in the outdoor unit anti-frosting device of the air source heat pump air conditioner, the renewable adsorption thin plate 7 is a thin plate formed by compacting and filling a plurality of granular renewable adsorption materials 5, at least one electric heating metal pipe 4 is uniformly embedded in the renewable adsorption thin plate 7, and the electric heating metal pipe 4 is fully contacted with the renewable adsorption materials 5, namely the electric heating metal pipe 4 can uniformly heat the renewable adsorption thin plate 7, so that the moisture adsorbed in the renewable adsorption materials 5 in the renewable adsorption thin plate 7 can be effectively separated out. Meanwhile, the structural shape of the renewable adsorption sheet 7 can be optimized, such as being designed into a honeycomb shape and determining the optimal thickness thereof through calculation, so as to increase the water absorption capacity and speed up the water absorption.
The invention relates to a method for preventing frosting of an outdoor unit of an air source heat pump air conditioner, which mainly comprises two processes, namely an air dehumidifying process and a regeneration process of a renewable adsorption thin plate 7. Specifically, during the heating cycle of the air source heat pump, the reproducible absorption sheet 7 absorbs moisture in the intake air of the outdoor heat exchanger 3, so that the relative humidity of the air on the surface of the outdoor heat exchanger 3 is reduced, thereby realizing the frost-free operation of the outdoor unit of the air source heat pump. When the renewable adsorption thin plate 7 absorbs water and is saturated, the internal electric heating metal tube 4 is opened to heat and desorb the renewable adsorption material 5, the indoor unit internal fan 2 is reversely rotated, the desorbed water is blown to the environment outside the outdoor unit, the renewable adsorption thin plate 7 is regenerated, and then the adsorption and dehumidification can be performed again, so that a cycle is formed.
Further, in the present embodiment, the fan 2 has a reverse operation function. When the regenerable adsorbent sheet 7 is regenerated, the regenerable adsorbent 5 needs to be regenerated by heating the plurality of electric heating metal pipes 4 embedded in the regenerable adsorbent sheet 7 and by matching with the reverse operation of the fan 2 inside the outdoor unit. Specifically, when the renewable adsorption sheet 7 is subjected to a regeneration process, in order to prevent moisture from entering the outdoor unit, the fan 2 is required to be operated in a reverse direction, that is, when the renewable adsorption material 5 absorbs water to reach saturation, the electrical heating metal tube 4 is used for heating, so that moisture in the renewable adsorption material 5 in the renewable adsorption sheet 7 can be rapidly and efficiently separated out, and the separated moisture is blown to the environment outside the outdoor unit in cooperation with the reverse operation of the fan 2, so that the renewable adsorption sheet 7 is restored. At this time, the rotating speed of the fan 2 needs to ensure that the wind speed of the outlet air can completely blow away the water vapor analyzed from the renewable adsorbing material 5.
Further, in the present embodiment, the regenerable adsorbent material 5 is characterized by: the water-absorbing material can absorb water in air at low temperature, has large absorption capacity, can resolve water when being heated, has good desorption performance, and has stable chemical property and long service life. The regenerable adsorbent material 5 includes, but is not limited to, one or a combination of molecular sieve, activated alumina, calcium sulfate, activated anhydrous copper sulfate, silica gel, lithium chloride, or modified silica gel. Wherein: the drying regeneration temperature of the molecular sieve is 250 ℃, the drying regeneration temperature of the active alumina is 200 ℃, the drying regeneration temperature of the calcium sulfate is 163 ℃, the drying regeneration temperature of the active anhydrous copper sulfate is 150 ℃, the drying regeneration temperature of the silica gel is 120 ℃, the drying regeneration temperature of the lithium chloride is 120 ℃ and the drying regeneration temperature of the modified silica gel is 90 ℃.
During the heating cycle of the air source heat pump, the moisture in the air is absorbed by the renewable adsorption material 5 in the renewable adsorption thin plate 7, and the outside air which is sucked into the outdoor unit to exchange heat with the outdoor heat exchanger 3 is subjected to adsorption dehumidification in advance, so that the moisture content of the air flowing through the outdoor heat exchanger 3 is lower than the frosting condition, and the frostless operation of the air source heat pump in the actual heating process is realized.
In addition, when the water absorption capacity of the renewable adsorption material 5 in the renewable adsorption sheet 7 reaches saturation, the regeneration mode of the renewable adsorption sheet 7 is started, the renewable adsorption material 5 is uniformly heated through the electric heating metal pipe 4, so that the moisture adsorbed by the renewable adsorption material 5 in the dehumidification and anti-frosting process can be effectively separated out, meanwhile, the moisture is blown to the environment outside the outdoor unit by matching with the reverse rotation of the fan 2 inside the outdoor unit, the dehydration regeneration of the renewable adsorption material 5 is completed, the renewable adsorption sheet 7 is recovered, and the continuous operation of the system is maintained. On one hand, the frequent start and stop of the compressor 1 and the frequent reversing of the four-way reversing valve 6 are avoided when the air source heat pump air conditioner is in heating operation; on the other hand, the outdoor unit of the air source heat pump air conditioner cannot generate any influence on the heating capacity and the comfort level required by a user due to frosting prevention.
The invention does not need to change the system structure, has simple process and can achieve the aim of preventing frosting by dehumidifying the air at the inlet of the outdoor heat exchanger 3; at the anti-frosting in-process, need not frequently to open and stop compressor 1, only need open the electrical heating of electrical heating tubular metal resonator 4 and the running direction of reversal fan 2, when guaranteeing heat pump system steady operation, have better anti-frosting effect. Compared with the prior technologies of reverse circulation defrosting, bypass defrosting, energy storage defrosting and the like, the invention can avoid the problems of frequent start and stop of the compressor 1 and unstable indoor heat supply, and can also prevent the problem of a large amount of accumulated water generated by the outdoor unit due to defrosting.
In summary, in the present embodiment, the proposed device for preventing frosting in the outdoor unit of the air-source heat pump air conditioner adopts the regenerable adsorption sheet 7 made of the sheet frame 12, the mesh 11, the electric heating metal tube 4 and the regenerable adsorption material 5 to prevent the frosting problem caused by the excessive humidity of the air on the surface of the outdoor heat exchanger 3 during the heating cycle of the air-source heat pump. The purposes of humidity reduction and frost prevention can be achieved by only installing the renewable adsorption thin plate 7 between the air inlet 9 of the outdoor unit of the heat pump air conditioner and the outdoor heat exchanger 3 in the structure without other changes, and the heat pump air conditioner is simple in structure, convenient to modify and high in feasibility. The formation of the frost layer is avoided from the source by destroying the formation condition of the frost layer through the dehumidifying device in principle, and the problems of poor heat exchange performance, insufficient heating capacity and the like of the air source heat pump outdoor heat exchanger 3 caused by frosting are solved; in the dehumidification and anti-frosting process, the heat pump system can normally supply heat for users, the problems that indoor heat supply is unstable and the user comfort level experience is poor due to the defrosting process in the traditional defrosting mode are solved, and the problem that a large amount of water is accumulated due to defrosting of an outdoor unit can be prevented. In addition, directly bury electrical heating tubular metal resonator 4 in regeneration adsorption material 5, electrical heating tubular metal resonator 4 and the even abundant contact of regeneration adsorption material 5 fully utilize the heat that electrical heating tubular metal resonator 4 produced to heat regeneration adsorption material 5, cooperate the reversal of fan 2 for the dehydration regeneration rate of regeneration adsorption material 5 accelerates.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. An outdoor unit anti-frosting device of an air source heat pump air conditioner is characterized by comprising an outdoor unit, wherein an outdoor unit air inlet (9) and an outdoor unit air outlet (10) are arranged on the outer side of the outdoor unit, and a fan (2), an outdoor heat exchanger (3) and a reproducible adsorption thin plate (7) are arranged inside the outdoor unit; the fan (2) can be operated in a forward direction and a reverse direction; the renewable adsorption thin plate (7) is arranged between the outdoor unit air inlet (9) and the outdoor heat exchanger (3), and the fan (2) is arranged between the outdoor heat exchanger (3) and the outdoor unit air outlet (10);
the renewable adsorption sheet (7) comprises an electric heating metal tube (4) and a renewable adsorption material (5), the renewable adsorption sheet (7) is filled with the renewable adsorption material (5), and the electric heating metal tube (4) is embedded inside the renewable adsorption sheet (5).
2. The outdoor unit frost prevention device of an air-source heat pump air-conditioner according to claim 1, wherein the regenerable adsorbent sheet (7) further comprises a sheet frame (12) and a mesh screen (11), wherein the sheet frame (12) serves as a support carrier of the regenerable adsorbent material (5), and the mesh screen (11) is fixed on the sheet frame (12) and covers the regenerable adsorbent material (5) at the outer side.
3. The outdoor unit of an air-source heat pump air conditioner of claim 2, wherein the sheet frame (12) is processed from glass fiber or heat-resistant ceramic material.
4. The outdoor unit frost prevention device of claim 2, wherein the sheet frame (12) is fixed between the outdoor unit air inlet (9) and the outdoor unit heat exchanger (3) through the fixing hole (13).
5. The outdoor unit frost prevention device of an air-source heat pump air conditioner according to claim 1, wherein the regenerable adsorbent sheet (7) is a sheet obtained by compacting and filling a plurality of granular regenerable adsorbent materials (5), at least one electric heating metal tube (4) is uniformly embedded in the regenerable adsorbent sheet (7), and the electric heating metal tube (4) is in full contact with the regenerable adsorbent materials (5).
6. The outdoor unit frost prevention device of an air-source heat pump air-conditioner according to claim 1, wherein the regenerable adsorbent material (5) has a function of adsorbing moisture at a low temperature and desorbing moisture at a high temperature, and has a stable material chemical property.
7. The outdoor unit frost prevention device of an air-source heat pump air conditioner according to claim 6, wherein the regenerable adsorbent material (5) is one or a combination of molecular sieve, activated alumina, calcium sulfate, activated anhydrous copper sulfate, silica gel, lithium chloride or modified silica gel.
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| CN202110271028.9A CN112984643A (en) | 2021-03-02 | 2021-03-02 | Outdoor unit anti-frosting device of air source heat pump air conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383219A (en) * | 2021-12-27 | 2022-04-22 | 青岛海尔空调器有限总公司 | Method and device for defrosting of air conditioner and air conditioner |
| CN115234981A (en) * | 2022-07-05 | 2022-10-25 | 青岛海信日立空调系统有限公司 | Air conditioner |
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| CN115234981B (en) * | 2022-07-05 | 2023-09-26 | 青岛海信日立空调系统有限公司 | Air conditioner |
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