CN101430153B - Defrosting method for thermal pump air conditioner - Google Patents
Defrosting method for thermal pump air conditioner Download PDFInfo
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- CN101430153B CN101430153B CN2008101832673A CN200810183267A CN101430153B CN 101430153 B CN101430153 B CN 101430153B CN 2008101832673 A CN2008101832673 A CN 2008101832673A CN 200810183267 A CN200810183267 A CN 200810183267A CN 101430153 B CN101430153 B CN 101430153B
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- heat exchanger
- outdoor heat
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- tube
- bypass
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000010257 thawing Methods 0.000 title abstract description 27
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a defrosting method of a heat pump air conditioner. The method comprises the following steps: adopting bypass tube bypass compressor containing a bypass solenoid valve and a front tube bank of an outdoor heat exchanger, and connecting the solenoid valve and a capillary tube between the front tube bank of the outdoor heat exchanger and a rear tube bank of the outdoor heat exchanger in parallel; the defrosting process comprises the following steps: closing the solenoid valve; opening the bypass solenoid valve; and causing the refrigerant to sequentially flow through the compressor, a four-way reversing valve, the bypass solenoid valve, the front tube bank of the outdoor heat exchanger, the capillary tube and the rear tube bank of the outdoor heat exchanger, and then flow through the four-way reversing valve and return to the compressor; during the flow process, taking the front tube bank of the outdoor heat exchanger as a condenser and the rear tube bank of the outdoor heat exchanger as an evaporator, and melting a frost layer on the surface of the front tube bank of the outdoor heat exchanger; and/or changing the conducting direction of the reversing valve to melt the frost layer on the surface of the rear tube bank of the outdoor heat exchanger. The invention also provides the heat pump air conditioner. The method can efficiently, quickly and safely remove the frost layer on the surface of the outdoor heat exchanger.
Description
Technical field
The present invention relates to the defrosting of air-conditioner, be meant a kind of Defrost method of heat pump air conditioner especially.
At present, reverse cycle defrosting and hot-gas bypass defrosting are mainly adopted in the defrosting of air-conditioner.Reverse cycle defrosting is that system is converted to refrigerating state, outdoor heat exchanger is as condenser, the condensation heat release therein of the cold-producing medium of HTHP makes white melting layer, but indoor heat exchanger is as evaporimeter in this process, can be from indoor heat absorption, influence comfortableness, have the defrost scarce capacity simultaneously, slow problem.
The hot-gas bypass Defrost method adopts the evaporimeter short circuit, and the direct inlet chamber external heat exchanger of gaseous refrigerant of the HTHP that compressor is discharged defrosts, and in this defrost process, the energy of defrosting all comes from compressor, and is consuming time longer.In addition, two combs before and after the outdoor heat exchanger of air-conditioner mostly is, the pipeline trend designs according to cooling condition, its design feature and air intake direction have determined that the frosting of front-seat windward side is serious, row is faint relatively in the back, existing hot gas defrost method all is that heat exchanging device front and rear row is unified defrosting, the inhomogeneous waste that will certainly cause energy of frost layer.
Summary of the invention
In view of this, the invention reside in Defrost method and air-conditioner that a kind of heat pump air conditioner is provided, above-mentioned Defrost method speed is slow to solve, the energy dissipation problem of higher.
For addressing the above problem, the invention provides a kind of Defrost method of heat pump air conditioner, system comprises:
Indoor heat exchanger (3), main capillary (4), compressor (1), comb (5), rear of tube (6) before the outdoor heat exchanger, setting makes the bypass pipe of indoor heat exchanger (3) and main capillary (4) bypass, is connecting magnetic valve (7) and capillary (8) in parallel between the comb of the front and back of outdoor heat exchanger;
Defrost process comprises:
Close magnetic valve, open bypass solenoid valve, comb, capillary, outdoor heat exchanger rear of tube before the compressed machine of cold-producing medium sequential flow, four-way change-over valve, bypass solenoid valve, the outdoor heat exchanger, four-way change-over valve, get back to compressor, in the flow process, before the outdoor heat exchanger comb as condenser, outdoor heat exchanger rear of tube as evaporimeter, with the front-seat tube-surface frost of outdoor heat exchanger melting layer;
With, conversion four-way change-over valve conducting direction, comb, bypass solenoid valve before the compressed machine of cold-producing medium sequential flow, four-way change-over valve, outdoor heat exchanger rear of tube, capillary, outdoor heat exchanger, return four-way change-over valve, compressor, in the flow process, the outdoor heat exchanger rear of tube is as condenser, and comb is as evaporimeter before the outdoor heat exchanger, white melting layer with outdoor heat exchanger rear of tube surface, after the end, open outdoor fan, magnetic valve, close bypass solenoid valve.
Defrost method and air-conditioner that the present invention proposes can efficient, rapid, safe removal be formed at the frost layer on outdoor heat exchanger surface, can guarantee that the air duct between the finned tube is unimpeded, thereby can improve heat transfer efficiency.
In the defrost process, flow of refrigerant can not influence indoor temperature without indoor heat exchanger, and comfortableness is good;
Because cold-producing medium only flows in off-premises station, without tube connector, flow process is short, and circulation rate is fast, and defrosting rapidly;
The outdoor heat exchanger front and rear row defrosts respectively, and can determine defrosting time at different frosting situations, and defrosting speed is wasted energy soon and not, can reach defrosting effect rapidly and thoroughly;
The defrosting starting stage does not have the conversion cross valve, and the system pressure fluctuation is little.
Description of drawings
Fig. 1 is the air conditioner structure figure among the embodiment.
The specific embodiment
For clearly demonstrating the scheme among the present invention, provide preferred embodiment below and be described with reference to the accompanying drawings.
Referring to Fig. 1, air-conditioner among the present invention, compressor 1 and outdoor heat exchanger are constituted a circulation, and without indoor heat exchanger 3, the short circulation rate of flow process is fast, comb 5, rear of tube 6 defrost respectively before the outdoor heat exchanger, determine defrosting time at different frosting situations, defrosting speed is fast and save the energy, and outdoor heat exchanger has half as evaporimeter during defrosting, continue the outer heat of absorption chamber, thereby reach the purpose that effectively defrosts fast.System comprises: indoor heat exchanger 3, main capillary 4, comb 5, rear of tube 6 before the compressor 1, outdoor heat exchanger, setting makes the bypass pipe of indoor heat exchanger 3 and main capillary 4 bypass, is connecting magnetic valve 7 and capillary 8 in parallel between the comb of the front and back of outdoor heat exchanger.Bypass solenoid valve 9 when normal refrigeration or heating operation on the bypass pipe is closed, and the magnetic valve 7 before and after the outdoor heat exchanger between the comb is opened.
Open the bypass solenoid valve 9 on the bypass pipe during defrosting, because the effect of resistance, most of cold-producing mediums will flow to the preceding comb 5 and the rear of tube 6 of outdoor heat exchanger by bypass pipe, and without indoor heat exchanger 3 and main capillary 4, magnetic valve 7 before and after while close chamber's external heat exchanger between the comb, cold-producing medium flow through comb 5 before the compressor 1, bypass pipe, outdoor heat exchanger, capillary 8, outdoor heat exchanger rear of tube 6, get back to compressor 1 at last, outdoor heat exchanger formation one has the holonomic system of condenser, evaporimeter and throttle mechanism.
Describe method of the present invention below in detail, this method comprises: before the outdoor heat exchanger of air-conditioning between comb 5, the outdoor heat exchanger rear of tube 6, and magnetic valve 7 in parallel and capillary 8.The process of defrosting comprises the steps:
1, closes outdoor fan 10, magnetic valve 7, open bypass solenoid valve 9, cold-producing medium flow through comb 5, capillary 8, outdoor heat exchanger rear of tube 6, four-way change-over valve 2 before the compressor 1, four-way change-over valve 2, bypass solenoid valve 9, outdoor heat exchanger, get back to compressor 1, as evaporimeter, comb 5 surface frost layers are at first melted comb 5 before the outdoor heat exchanger as condenser, outdoor heat exchanger rear of tube 6 before the outdoor heat exchanger;
2, after comb 5 defrostings finish before the outdoor heat exchanger, conversion four-way change-over valve 2 conducting directions, cold-producing medium is sent from compressor 1, deliver to outdoor heat exchanger rear of tube 6, capillary 8, the preceding comb 5 of outdoor heat exchanger through four-way change-over valve 2, after four-way change-over valve 2 is got back to compressor 1, outdoor heat exchanger rear of tube 6 is as condenser, and comb 5 is as evaporimeter before the outdoor heat exchanger, and the frost layer on outdoor heat exchanger rear of tube 6 surfaces begins to melt.
3, after 6 defrostings of outdoor heat exchanger rear of tube are all over, open outdoor fan 10, open magnetic valve 7, close bypass solenoid valve 9, normal heating operation recovers in system.
Defrost method and air-conditioner that the present invention proposes can efficient, rapid, safe removal be formed at the frost layer on outdoor heat exchanger surface, can guarantee that the air duct between the finned tube is unimpeded, thereby can improve heat transfer efficiency.
In the defrost process, flow of refrigerant can not influence indoor temperature without indoor heat exchanger, and comfortableness is good;
Because cold-producing medium only flows in off-premises station, without tube connector, flow process is short, and circulation rate is fast, and defrosting rapidly;
The outdoor heat exchanger front and rear row defrosts respectively, and can determine defrosting time at different frosting situations, and defrosting speed is wasted energy soon and not, can reach defrosting effect rapidly and thoroughly;
The defrosting starting stage does not have the conversion cross valve, and the system pressure fluctuation is little.
For the method for being set forth among each embodiment of the present invention, within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. the Defrost method of a heat pump air conditioner, it is characterized in that, system comprises: indoor heat exchanger (3), main capillary (4), compressor (1), comb (5), rear of tube (6) before the outdoor heat exchanger are provided with the bypass pipe that makes indoor heat exchanger (3) and main capillary (4) bypass, are connecting magnetic valve (7) and capillary (8) in parallel between the comb of the front and back of outdoor heat exchanger;
Defrost process comprises:
Close magnetic valve (7), open the bypass solenoid valve (9) on the described bypass pipe, comb (5), capillary (8), outdoor heat exchanger rear of tube (6), four-way change-over valve (2) before the compressed machine of cold-producing medium sequential flow (1), four-way change-over valve (2), bypass solenoid valve (9), outdoor heat exchanger, get back to compressor (1), in the flow process, before the outdoor heat exchanger comb (5) as condenser, outdoor heat exchanger rear of tube (6) as evaporimeter, with the surperficial white melting layer of comb before the outdoor heat exchanger (5);
With, conversion four-way change-over valve (2) conducting direction, comb (5), bypass solenoid valve (9) before the compressed machine of cold-producing medium sequential flow (1), four-way change-over valve (2), outdoor heat exchanger rear of tube (6), capillary (8), the outdoor heat exchanger, return four-way change-over valve (2), compressor (1), in the flow process, outdoor heat exchanger rear of tube (6) is as condenser, and comb (5) is as evaporimeter, with the white melting layer on outdoor heat exchanger rear of tube (6) surface before the outdoor heat exchanger.
2. Defrost method according to claim 1 is characterized in that, after the described white melting layer with outdoor heat exchanger rear of tube (6) surface, also comprises:
Open outdoor fan (10), magnetic valve (7), close bypass solenoid valve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101832673A CN101430153B (en) | 2008-12-12 | 2008-12-12 | Defrosting method for thermal pump air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101832673A CN101430153B (en) | 2008-12-12 | 2008-12-12 | Defrosting method for thermal pump air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101430153A CN101430153A (en) | 2009-05-13 |
| CN101430153B true CN101430153B (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101832673A Active CN101430153B (en) | 2008-12-12 | 2008-12-12 | Defrosting method for thermal pump air conditioner |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121770B (en) * | 2011-03-10 | 2012-07-25 | 中山市麦科尔热能技术有限公司 | Working medium evaporation system for carbon dioxide heat pump water heating equipment |
| CN103245150B (en) * | 2013-05-15 | 2015-02-11 | 东南大学 | Air source heat pump defrosting device |
| CN106440098A (en) * | 2016-09-07 | 2017-02-22 | 海信（山东）空调有限公司 | Air-conditioner outdoor unit, defrosting control method and device of air-conditioner outdoor unit and air conditioner |
| CN107152734A (en) * | 2017-07-06 | 2017-09-12 | 珠海格力电器股份有限公司 | A kind of heat exchanger, heat pump air conditioner and control method |
| CN110186135B (en) * | 2019-03-27 | 2022-11-29 | 曾庆维 | Cold water fan and mobile air conditioner all-in-one machine |
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| CN101430153A (en) | 2009-05-13 |
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Effective date of registration: 20240326 Granted publication date: 20110511 |