CN111412701A - High-pressure waste heat defrosting system of air source heat pump - Google Patents
High-pressure waste heat defrosting system of air source heat pump Download PDFInfo
- Publication number
- CN111412701A CN111412701A CN202010229265.4A CN202010229265A CN111412701A CN 111412701 A CN111412701 A CN 111412701A CN 202010229265 A CN202010229265 A CN 202010229265A CN 111412701 A CN111412701 A CN 111412701A
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- China
- Prior art keywords
- air source
- exchanger
- heat pump
- heat
- water outlet
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
Abstract
The invention discloses a high-pressure waste heat defrosting system of an air source heat pump, which comprises an outdoor heat exchanger, a compressor, a conversion valve group, an air source fin exchanger and a four-way reversing valve, wherein the outdoor heat exchanger, the compressor and the air source fin exchanger are all connected with the four-way reversing valve, and the outdoor heat exchanger and the air source fin exchanger are all connected with the conversion valve group. The invention utilizes the residual heat after the exchange of the condenser in winter heating to heat the outdoor evaporator, thereby improving the temperature of the fins, avoiding frosting, promoting the refrigerant to be fully evaporated, improving the heating efficiency and reducing the energy waste caused by defrosting.
Description
Technical Field
The invention relates to the technical field of air source heat pumps, in particular to a high-pressure waste heat defrosting system of an air source heat pump.
Background
The air source heat pump is an environment-friendly energy source for the project of changing coal into electricity at present, but the air source heat pump is greatly limited due to low temperature in the north, the ambient temperature is low, an external evaporator is seriously frosted in a heating mode in winter, so that a refrigerant cannot be fully evaporated, the heating effect is greatly influenced, when the frosting is serious, frequent frosting is needed, the energy is consumed, and the heating effect is reduced, so that the air source heat pump is an insurmountable short plate of the air source heat pump air conditioner at present. Although some existing air source heat pumps adopt a low-temperature enthalpy increasing technology, the problem of evaporator frosting still cannot be solved, and the inventor of the invention has been in the refrigeration industry for many years and has troubled the problem that an outdoor unit evaporator frosts when heating in winter.
Disclosure of Invention
The invention aims to solve the technical problem that in order to overcome the defects of the prior art, the invention provides the high-pressure waste heat defrosting system of the air source heat pump, which utilizes the residual heat exchanged by the condenser during heating in winter to heat the outdoor evaporator, so that the temperature of fins is increased, frosting is avoided, refrigerant is fully evaporated, the heating efficiency is improved, and energy waste caused by defrosting is reduced.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the air source heat pump high-pressure waste heat defrosting system comprises an outdoor heat exchanger, a compressor, a conversion valve group, an air source fin exchanger and a four-way reversing valve, wherein the outdoor heat exchanger, the compressor and the air source fin exchanger are all connected with the four-way reversing valve, and the outdoor heat exchanger and the air source fin exchanger are all connected with the conversion valve group.
Preferably, a cold and hot water inlet for receiving cold water or hot water and a cold and hot water outlet for releasing the cold water or hot water are arranged on the outdoor heat exchanger.
Preferably, a water inlet, a first water outlet and a second water outlet are formed in the conversion valve group, the water inlet is connected with the outdoor heat exchanger, and the first water outlet and the second water outlet are both connected with the air source fin exchanger.
Preferably, the air source fin exchanger comprises a first air source fin exchanger and a second air source fin exchanger, and the first air source fin exchanger is respectively connected with the four-way reversing valve and the second water outlet.
Preferably, the second wind source heat exchanger is connected with the first water outlet.
Preferably, the air source heat pump high-pressure waste heat defrosting system further comprises a filter, one end of the filter is connected with the second air source fin exchanger, and the other end of the filter is connected with the conversion valve bank through a throttle valve.
By adopting the technical scheme, the high-pressure waste heat defrosting system of the air source heat pump provided by the invention has the following beneficial effects: the air source heat pump high-pressure waste heat defrosting system effectively utilizes the residual heat of the air source heat pump during heating exchange in winter, and transmits the heat to the outdoor heat exchanger through the copper pipe and the fins to heat the outdoor heat exchanger so as to frost and melt the surface of the outdoor heat exchanger, thereby ensuring that the air exchange efficiency is improved, reducing the defrosting times, improving the heating efficiency and reducing the time and energy consumption consumed during defrosting; if during the cooling mode in summer, through a set of conversion valves, convert this set of high pressure heat pipe that defrosts into the condenser, improved condensation area greatly, improved refrigeration effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, 1-outdoor heat exchanger, 2-compressor, 3-conversion valve group, 41-first air source fin exchanger, 42-second air source fin exchanger, 5-four-way reversing valve, 6-filter, 7-throttle valve, 11-cold and hot water outlet, 12-cold and hot water inlet, 31-water inlet, 32-first water outlet and 33-second water outlet.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
As shown in fig. 1, in the structural schematic diagram of the present invention, the air source heat pump high-pressure residual heat defrosting system includes an outdoor heat exchanger 1, a compressor 2, a conversion valve group 3, an air source fin exchanger, a four-way reversing valve 5 and a filter 6, wherein the outdoor heat exchanger 1, the compressor 2 and the air source fin exchanger are all connected to the four-way reversing valve 5, the outdoor heat exchanger 1 and the air source fin exchanger are all connected to the conversion valve group 3, one end of the filter 6 is connected to the second air source fin exchanger 42, and the other end of the filter 6 is connected to the conversion valve group 3 through a throttle valve 7. It can be understood that the above connection modes are all connected through copper pipes, the existing air source heat pump technology is a mature and widely used technology, but when heating is carried out in winter, particularly in northern areas, the external temperature is low, the refrigerant evaporation is insufficient, the suction pressure is reduced, and the heat exchanger frosts, the air source heat pump uses a fan to exchange heat in air, after frosting, the ventilation of fins is blocked, the exchange effect is affected, defrosting is required, electric energy is consumed during defrosting, and defrosting time can account for 30% of the unit operation time under general conditions.
Specifically, the outdoor heat exchanger 1 is provided with a cold and hot water inlet 12 for receiving cold water or hot water and a cold and hot water outlet 11 for releasing cold water or hot water; the conversion valve group 3 is provided with a water inlet 31, a first water outlet 32 and a second water outlet 33, the water inlet 31 is connected with the outdoor heat exchanger 1, and the first water outlet 32 and the second water outlet 33 are both connected with the air source fin exchanger; the wind source fin exchanger comprises a first wind source fin exchanger 41 and a second wind source fin exchanger 42, wherein the first wind source fin exchanger 41 is respectively connected with the four-way reversing valve 5 and the second water outlet 33; the second air source heat exchanger is connected with the first water outlet 32; the invention utilizes the residual heat after the exchange of the condenser in winter heating to heat the outdoor evaporator, so that the temperature of the fins in the wind source fin exchanger is increased, the frosting is avoided, the refrigerant is promoted to be fully evaporated, the heating efficiency is improved, the energy waste caused by the defrosting is reduced, and the environment protection is realized.
The invention has reasonable design and unique structure, effectively utilizes the residual heat of the air source heat pump during heating exchange in winter, transfers the heat to the outdoor heat exchanger 1 through the copper pipe and the fins in the air source fin exchanger, heats the outdoor heat exchanger 1, leads the surface of the outdoor heat exchanger to be frosted and melted, ensures that the air exchange efficiency is improved, reduces the defrosting times, improves the heating efficiency and also reduces the time and energy consumption consumed during defrosting; if during the refrigeration mode in summer, through a set of conversion valves 3, convert this set of high pressure heat pipe that defrosts into the condenser, improved condensation area greatly, improved refrigeration effect.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (6)
1. The utility model provides an air source heat pump high pressure waste heat defrosting system which characterized in that: the air source fin exchanger is connected with the four-way reversing valve, and the outdoor heat exchanger and the air source fin exchanger are connected with the switching valve group.
2. The air source heat pump high pressure residual heat defrosting system of claim 1, characterized in that: and the outdoor heat exchanger is provided with a cold and hot water inlet for accessing cold water or hot water and a cold and hot water outlet for releasing the cold water or the hot water.
3. The air source heat pump high pressure residual heat defrosting system of claim 1, characterized in that: the conversion valve group is provided with a water inlet, a first water outlet and a second water outlet, the water inlet is connected with the outdoor heat exchanger, and the first water outlet and the second water outlet are both connected with the air source fin exchanger.
4. The air source heat pump high-pressure waste heat defrosting system according to claim 3, characterized in that: the air source fin exchanger comprises a first air source fin exchanger and a second air source fin exchanger, and the first air source fin exchanger is respectively connected with the four-way reversing valve and the second water outlet.
5. The air source heat pump high pressure residual heat defrosting system of claim 4, characterized in that: the second air source heat exchanger is connected with the first water outlet.
6. The air source heat pump high pressure residual heat defrosting system of claim 4, characterized in that: the air conditioner further comprises a filter, one end of the filter is connected with the second air source fin exchanger, and the other end of the filter is connected with the conversion valve group through a throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010229265.4A CN111412701A (en) | 2020-03-27 | 2020-03-27 | High-pressure waste heat defrosting system of air source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010229265.4A CN111412701A (en) | 2020-03-27 | 2020-03-27 | High-pressure waste heat defrosting system of air source heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111412701A true CN111412701A (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010229265.4A Pending CN111412701A (en) | 2020-03-27 | 2020-03-27 | High-pressure waste heat defrosting system of air source heat pump |
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| CN (1) | CN111412701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762508A (en) * | 2020-12-31 | 2021-05-07 | 浙江中广电器股份有限公司 | Waterless floor heating heat recovery control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2277055Y (en) * | 1997-01-16 | 1998-03-25 | 楼世竹 | Forward circulating heat pump |
| CN101382351A (en) * | 2008-10-21 | 2009-03-11 | 中南大学 | Air source heat pump air conditioner and defrosting method thereof |
| CN201715775U (en) * | 2010-07-07 | 2011-01-19 | 深圳市庄合热泵空调有限公司 | Air-source heat pump air conditioner |
| CN103335463A (en) * | 2013-07-08 | 2013-10-02 | 上海交通大学 | Area-separated and functionalized defrosting system of heat pump type air cooled air conditioner |
| CN103759456A (en) * | 2014-01-27 | 2014-04-30 | 平武臣 | Heat exchange system of air conditioner or heat pump and defrosting method of heat exchange system |
| KR20190055967A (en) * | 2017-11-16 | 2019-05-24 | 엘지전자 주식회사 | Air conditioner and the method controlling the same |
-
2020
- 2020-03-27 CN CN202010229265.4A patent/CN111412701A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2277055Y (en) * | 1997-01-16 | 1998-03-25 | 楼世竹 | Forward circulating heat pump |
| CN101382351A (en) * | 2008-10-21 | 2009-03-11 | 中南大学 | Air source heat pump air conditioner and defrosting method thereof |
| CN201715775U (en) * | 2010-07-07 | 2011-01-19 | 深圳市庄合热泵空调有限公司 | Air-source heat pump air conditioner |
| CN103335463A (en) * | 2013-07-08 | 2013-10-02 | 上海交通大学 | Area-separated and functionalized defrosting system of heat pump type air cooled air conditioner |
| CN103759456A (en) * | 2014-01-27 | 2014-04-30 | 平武臣 | Heat exchange system of air conditioner or heat pump and defrosting method of heat exchange system |
| KR20190055967A (en) * | 2017-11-16 | 2019-05-24 | 엘지전자 주식회사 | Air conditioner and the method controlling the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762508A (en) * | 2020-12-31 | 2021-05-07 | 浙江中广电器股份有限公司 | Waterless floor heating heat recovery control method |
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Application publication date: 20200714 |
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