CN102645064A - Defrosting method and device of air source heat pump set - Google Patents

Defrosting method and device of air source heat pump set Download PDF

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Publication number
CN102645064A
CN102645064A CN2012101636706A CN201210163670A CN102645064A CN 102645064 A CN102645064 A CN 102645064A CN 2012101636706 A CN2012101636706 A CN 2012101636706A CN 201210163670 A CN201210163670 A CN 201210163670A CN 102645064 A CN102645064 A CN 102645064A
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China
Prior art keywords
defrosting
heat exchanger
heat pump
control circuit
source heat
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Pending
Application number
CN2012101636706A
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Chinese (zh)
Inventor
钟学斌
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钟学斌
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Priority to CN2012101636706A priority Critical patent/CN102645064A/en
Publication of CN102645064A publication Critical patent/CN102645064A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a defrosting method and device of an air source heat pump set. The defrosting method comprises the following steps: firstly, a defrosting state sensing circuit detects the wall temperature t1 of the inlet of an outdoor heat exchanger and the temperature t2 of the air inlet of the outdoor heat exchanger, and the temperature difference of t1 and t2 is delta t; when t2 is greater than or equal to -1 DEG C and is less than or equal to 4 DEG C, delta t is less than or equal to 6 DEG C or t2 is less than -1 DEG C, delta t is greater than or equal to 8 DEG C or t2 is greater than 4 DEG C, delta t is greater than or equal to 5 DEG C, a defrosting control circuit switches on an electromagnetic valve in a by-pass device; 10%-15% of the volume of -high-pressure high-temperature refrigerant exhausted by a compressor directly flows into the outdoor heat exchanger through the by-pass device to carry out defrosting; and when the temperature difference delta t is less than or equal to 2 DEG C, and after the time delay of the defrosting control circuit is greater than or equal to two minutes, the electromagnetic valve is switched off, and the defrosting is stopped. The invention also comprises a defrosting device of the air source heat pump set. The defrosting method and the defrosting device of an air source heat pump set provided by the invention can avoid the situations that defrosting is not carried out timely and thoroughly and the situation of excessive defrosting, thereby improving the heating efficiency of the set and reducing energy consumption.

Description

A kind of defrosting method of net for air-source heat pump units and device
Technical field
The present invention relates to a kind of defrosting method and device of net for air-source heat pump units.
Background technology
When the net for air-source heat pump units evaporating temperature dropped to certain value, airborne steam was when the outdoor heat exchanger, met can condense into frost after cold and be attached to the outdoor heat exchanger surface; Hinder heat exchange; Directly influence heat absorption, cause the unit evaporating temperature constantly to descend, outdoor heat exchanger surface frosting constantly increases; Finally can cause the machine can't operate as normal, only carry out to continue operate as normal after effective defrost.
At present, net for air-source heat pump units is after the outdoor heat exchanger frosting is arrived to a certain degree, just carries out defrost, through the switching-over of defrost circuit control cross valve, changes refrigerant flow direction and realizes defrost.And adopt this defrosting method, externally under the changeable situation of environment (like temperature, humidity), it is untimely the unit defrost to occur; Defrost is not thorough; Unfavorable conditions such as defrost is excessive, thus cause the unit heating effect poor, and unit can not continuously normally heat; Thereby reduce the unit heating efficiency, waste energy.
Summary of the invention
Technical problem to be solved by this invention is, a kind of situation such as to avoid defrost occurring untimely, and defrost is not thorough, and defrost is excessive is provided, thereby improves the unit heating efficiency, the defrosting method of the net for air-source heat pump units that cuts down the consumption of energy and device.
The technical scheme that the present invention solves its technical problem employing is:
The defrosting method of the present invention's net for air-source heat pump units; At first detect outdoor heat exchanger porch wall temperature t1, outdoor heat exchanger intake air temperature t2, both temperature difference △ t through the frosting state detection circuit; When-1 ℃≤t2≤4 ℃, △ t>=6 ℃ or t2<-1 ℃, △ t>=8 ℃ or t2>4 ℃; During △ t>=5 ℃; Through the magnetic valve in the defrost control circuit conducting by-pass collar, let the 10%-15% of the high-temperature high-pressure refrigerant volume that compressor discharges directly branch to outdoor heat exchanger through by-pass collar, carry out defrost; When temperature difference △ t≤2 ℃, break off magnetic valve through the time-delay of defrost control circuit after>=2 minutes, stop defrost.
The defrosting device of the present invention's net for air-source heat pump units; Comprise frosting state detection circuit, defrost control circuit; Said frosting state detection circuit links to each other with the defrost control circuit, also is provided with by-pass collar, and said by-pass collar is made up of magnetic valve and capillary; The coil of said magnetic valve links to each other with the defrost control circuit; The input of said magnetic valve links to each other with the compressor exhaust pipe of net for air-source heat pump units, and the output of said magnetic valve links to each other with an end capillaceous, and the said other end capillaceous links to each other with the inlet of the outdoor heat exchanger of net for air-source heat pump units.
Said frosting state detection circuit, defrost control circuit, magnetic valve, capillary are prior art.
The formation of frosting must possess following two conditions: the one, low low-temperature receiver arranged, and temperature is enough low, and the 2nd, in the air steam to be arranged, these 2 are indispensable.Though what (relative humidity) of water in air steam are difficult to change, low low-temperature receiver (evaporating temperature of unit) has way to change.The present invention directly branches to outdoor heat exchanger through magnetic valve, capillary through the high-temperature high-pressure refrigerant that lets compressor discharge, thereby changes low low-temperature receiver (evaporating temperature), carries out defrost.
Compared with prior art, the present invention has the following advantages: defrost can not only in time be carried out in (1), and situation such as defrost is excessive, defrost is not thorough can not occur; (2) can normally heat defrost the time, can improve the unit heating efficiency more than 10%, cut down the consumption of energy more than 20%.
The specific embodiment
Below in conjunction with embodiment the present invention is further specified.
The defrosting method of the net for air-source heat pump units of present embodiment at first detects outdoor heat exchanger porch wall temperature t1, outdoor heat exchanger intake air temperature t2, both temperature difference △ t through the frosting state detection circuit, when-1 ℃≤t2≤4 ℃; △ t>=6 ℃ or t2<-1 ℃ are when △ t>=8 ℃ or t2>4 ℃, △ t>=5 ℃; Through the magnetic valve in the defrost control circuit conducting by-pass collar; Let the 10-15% of the high-temperature high-pressure refrigerant volume that compressor discharges directly branch to outdoor heat exchanger, carry out defrost, when temperature difference △ t≤2 ℃ through by-pass collar; Break off magnetic valve through the time-delay of defrost control circuit after>=2 minutes, stop defrost.
The defrosting device of the net for air-source heat pump units of present embodiment; Comprise frosting state detection circuit, defrost control circuit; Said frosting state detection circuit links to each other with the defrost control circuit, also is provided with by-pass collar, and said by-pass collar is made up of magnetic valve and capillary; The coil of said magnetic valve links to each other with the defrost control circuit; The input of said magnetic valve links to each other with the compressor exhaust pipe of net for air-source heat pump units, and the output of said magnetic valve links to each other with an end capillaceous, and the said other end capillaceous links to each other with the inlet of the outdoor heat exchanger of net for air-source heat pump units.
Operation principle: when the frosting state detection circuit detects outdoor heat exchanger and begins frosting; Output control signals to the defrost control circuit, the work of defrost control circuit control magnetic valve, solenoid valve conduction; The high-temperature high-pressure refrigerant that lets compressor discharge directly branches to outdoor heat exchanger (not passing through indoor heat exchanger) through magnetic valve, capillary; Cold-producing medium in the outdoor heat exchanger is increased sharply, improve evaporating temperature and pressure, when normally heating, carry out defrost or prevent the outdoor heat exchanger frosting; When the frosting state detection circuit detects temperature difference △ t≤2 ℃ of outdoor heat exchanger porch wall temperature t1 and outdoor heat exchanger intake air temperature t2, after>=2 minutes, break off magnetic valve through the time-delay of defrost control circuit, stop defrost.

Claims (2)

1. the defrosting method of a net for air-source heat pump units; It is characterized in that: at first detect outdoor heat exchanger porch wall temperature t1, outdoor heat exchanger intake air temperature t2, both temperature difference △ t through the frosting state detection circuit; When-1 ℃≤t2≤4 ℃, △ t>=6 ℃ or t2<-1 ℃, △ t>=8 ℃ or t2>4 ℃; During △ t>=5 ℃; Through the magnetic valve in the defrost control circuit conducting by-pass collar, let the 10%-15% of the high-temperature high-pressure refrigerant volume that compressor discharges directly branch to outdoor heat exchanger through by-pass collar, carry out defrost; When temperature difference △ t≤2 ℃, break off magnetic valve through the time-delay of defrost control circuit after>=2 minutes, stop defrost.
2. the defrosting device of a net for air-source heat pump units; Comprise frosting state detection circuit, defrost control circuit; Said frosting state detection circuit links to each other with the defrost control circuit, it is characterized in that: also be provided with by-pass collar, said by-pass collar is made up of magnetic valve and capillary; The coil of said magnetic valve links to each other with the defrost control circuit; The input of said magnetic valve links to each other with the compressor exhaust pipe of net for air-source heat pump units, and the output of said magnetic valve links to each other with an end capillaceous, and the said other end capillaceous links to each other with the inlet of the outdoor heat exchanger of net for air-source heat pump units.
CN2012101636706A 2012-05-24 2012-05-24 Defrosting method and device of air source heat pump set Pending CN102645064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012101636706A CN102645064A (en) 2012-05-24 2012-05-24 Defrosting method and device of air source heat pump set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012101636706A CN102645064A (en) 2012-05-24 2012-05-24 Defrosting method and device of air source heat pump set

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CN102645064A true CN102645064A (en) 2012-08-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103062956A (en) * 2013-01-31 2013-04-24 山东威特人工环境有限公司 Absorption type heat pump with auxiliary defrosting function, and defrosting method thereof
CN104567163A (en) * 2015-01-15 2015-04-29 陈志强 Novel air source heat pump defrosting control method
CN107687728A (en) * 2017-09-07 2018-02-13 科希曼电器有限公司 A kind of control method for the air energy heat pump defrost for judging condensation point
CN110608512A (en) * 2019-09-17 2019-12-24 珠海格力电器股份有限公司 Air conditioner control method and device, air conditioner and water pan assembly

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61153332A (en) * 1984-12-26 1986-07-12 Hitachi Ltd Defrosting control device
JPH01300169A (en) * 1988-05-27 1989-12-04 Toshiba Corp Refrigeration cycle device
JPH07120116A (en) * 1993-10-29 1995-05-12 Mitsubishi Electric Corp Cooler
US5507154A (en) * 1994-07-01 1996-04-16 Ranco Incorporated Of Delaware Self-calibrating defrost controller
CN1467462A (en) * 2002-07-03 2004-01-14 Lg电子株式会社 Defrosting apparatus of air conditioner and method thereof
KR20040081516A (en) * 2003-03-13 2004-09-22 엘지전자 주식회사 Method for controlling defrosting operation for air conditioner
CN201126288Y (en) * 2007-09-13 2008-10-01 海尔集团公司 Air conditioning system capable of producing heat without intermittence when defrosting
CN101344340A (en) * 2007-07-10 2009-01-14 松下电器产业株式会社 Air conditioner
CN101539348A (en) * 2008-03-18 2009-09-23 Lg电子株式会社 Air conditioner and control method thereof
CN101749904A (en) * 2008-12-05 2010-06-23 乐金电子(天津)电器有限公司 Hot air bypassing continuous heat-supply and defrost cycle structure of air conditioner

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61153332A (en) * 1984-12-26 1986-07-12 Hitachi Ltd Defrosting control device
JPH01300169A (en) * 1988-05-27 1989-12-04 Toshiba Corp Refrigeration cycle device
JPH07120116A (en) * 1993-10-29 1995-05-12 Mitsubishi Electric Corp Cooler
US5507154A (en) * 1994-07-01 1996-04-16 Ranco Incorporated Of Delaware Self-calibrating defrost controller
CN1467462A (en) * 2002-07-03 2004-01-14 Lg电子株式会社 Defrosting apparatus of air conditioner and method thereof
KR20040081516A (en) * 2003-03-13 2004-09-22 엘지전자 주식회사 Method for controlling defrosting operation for air conditioner
CN101344340A (en) * 2007-07-10 2009-01-14 松下电器产业株式会社 Air conditioner
CN201126288Y (en) * 2007-09-13 2008-10-01 海尔集团公司 Air conditioning system capable of producing heat without intermittence when defrosting
CN101539348A (en) * 2008-03-18 2009-09-23 Lg电子株式会社 Air conditioner and control method thereof
CN101749904A (en) * 2008-12-05 2010-06-23 乐金电子(天津)电器有限公司 Hot air bypassing continuous heat-supply and defrost cycle structure of air conditioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103062956A (en) * 2013-01-31 2013-04-24 山东威特人工环境有限公司 Absorption type heat pump with auxiliary defrosting function, and defrosting method thereof
CN104567163A (en) * 2015-01-15 2015-04-29 陈志强 Novel air source heat pump defrosting control method
CN107687728A (en) * 2017-09-07 2018-02-13 科希曼电器有限公司 A kind of control method for the air energy heat pump defrost for judging condensation point
CN107687728B (en) * 2017-09-07 2020-12-15 科希曼电器有限公司 Air energy heat pump defrosting control method for judging condensation point
CN110608512A (en) * 2019-09-17 2019-12-24 珠海格力电器股份有限公司 Air conditioner control method and device, air conditioner and water pan assembly

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Application publication date: 20120822