CN101012989A - Gas engine driven heat pump defrosting device - Google Patents

Gas engine driven heat pump defrosting device Download PDF

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Publication number
CN101012989A
CN101012989A CNA2006100415359A CN200610041535A CN101012989A CN 101012989 A CN101012989 A CN 101012989A CN A2006100415359 A CNA2006100415359 A CN A2006100415359A CN 200610041535 A CN200610041535 A CN 200610041535A CN 101012989 A CN101012989 A CN 101012989A
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China
Prior art keywords
valve
heat
defrost
cooling water
water
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Granted
Application number
CNA2006100415359A
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Chinese (zh)
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CN100494832C (en
Inventor
李应林
张小松
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Southeast University
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Southeast University
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Priority to CNB2006100415359A priority Critical patent/CN100494832C/en
Publication of CN101012989A publication Critical patent/CN101012989A/en
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Publication of CN100494832C publication Critical patent/CN100494832C/en
Expired - Fee Related legal-status Critical Current
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

The invention relates to a heat pump defrost device driven by the gas turbine, which can combine the abundant heat utilization and the heat pump defrost techniques. The invention comprises a heating defrost circulator, a cooling water circulator and a control system, wherein, the defrost circulator via the thermal-insulated water box is connected with the cooling water circulator; and the defrost circulator and the cooling water circulator are connected with the control system electrically. In the defrost process, the invention recycles the heat of engine and discharge smoke, via the water circulator to be stored in the thermal-insulated water box, to utilize the energy of stored hot water of water box to defrost. And in the defrost process, the four-way valve is not steered, to avoid affecting the indoor heat supply. The invention can supply hot water at 70Deg. C without defrosting.

Description

Gas engine driven heat pump defrosting device
Technical field
The present invention relates to a kind of novel defroster of gas engine driven heat pump air-conditioning unit, belong to the technical field of refrigeration air-conditioner.
Background technology
Net for air-source heat pump units is in the process of heating, and when off-premises station heat exchanger coils temperature was lower than the air dew point temperature, its surface can produce condensed water, and in a single day condensed water is lower than 0 ℃ just may frosting.When frosting was serious, air channel between the off-premises station heat exchanger fin was local or all occupied by the frost layer, thereby had increased thermal resistance and windage, and this will directly influence the heat exchange efficiency of off-premises station heat exchanger.The frosting phenomenon is inevitable phenomenon in the heat supplying process of heat-pump air-conditioner, and therefore, it is essential that defroster is set in net for air-source heat pump units.Current defroster has two kinds of inverse defrosting and bypass defrosts usually, and this is illustrated respectively:
Inverse defrosting is in service at heat pump heat supply, by four-way change-over valve kind of refrigeration cycle is defended kind of refrigeration cycle from the heat supplying process switching, even the high-temperature high-pressure refrigerant gas from compressor is discharged flows in the off-premises station coil pipe that has frost, make the white melting layer that is attached on the off-premises station coil pipe.There is tangible deficiency in the inverse defrosting mode: owing to defrost and heat is alternate run, thereby causes frequent start and stop compressor and switch cross valve; Indoorly in the defrost process do not supply heat, even blow out cold wind; The defrosting holding time is long, and the air conditioner surroundings temperature obviously descends during causing defrosting; Cold and hot refrigerant mixed is arranged in the handoff procedure, caused the loss of energy.
Bypass defrost is to open by-passing valve when needs defrost, make the high temperature and high pressure gas part of discharging from compressor directly outside the inlet chamber machine heat exchanger defrost, making a little of it can be kept indoor a certain amount of heat supply in the defrost process, shortcoming is also clearly: because part cold-producing medium inlet chamber external heat exchanger coil pipe just, heat is limited, cause defrosting slow, defrosting time is long.
More than two kinds of defrosters, the defroster that all belongs to electrically driven (operated) air source heat pump, they all are that the system thermal of utilizing compressor work to become defrosts, during do not have other heat supplement, need a large amount of heats and defrost to make, so total effect is poor.The existing now measure that utilizes other heat energy to defrost as adopting electric heating tube, though this method can improve defrosting effect, has increased component costs, also expends many electric energy.Therefore, the Defrost method of development of new is significant.
Summary of the invention
Technical problem: at present air source heat pump Defrost method such as inverse defrosting, the bypass defrost etc. of common employing, unit is in defrost process, the indoor heat supply all is a greater impact.The defroster device and the method for operating thereof that the purpose of this invention is to provide a kind of gas engine driven heat pump, this defroster is by utilizing the waste heat defrosting of system recoveries, and in the defrost process, cross valve does not commutate, and indoor heating is influenced by defrost process hardly.
Technical scheme: gas engine driven heat pump air-conditioning of the present invention is to be the energy with the combustion gas, drives compressor with the gas driven gas engine and carries out cooling and warming.This heat pump air conditioner unit comprises heat supply defrosting circulating system and control system, and described heat supply defrosting circulating system also is used for defrosting except being used for heat supply.The present invention improves the heat supply defrost cycle and the control system of heat pump air conditioner unit, and has increased the cooling water water circulation system, makes unit in refrigeration or when heating, and the hot water about 70 ℃ can externally be provided.
The objective of the invention is to invent a kind of defroster of gas engine driven heat pump air-conditioning unit according to the deficiency of the defroster that has electrically driven (operated) heat pump air conditioner unit now, this device is in defrost process, unit reclaims cylinder sleeve of engine heat radiation and smoke evacuation used heat, by water circulation system recovery waste heat is stored in the attemperater, utilize the hot water energy gasification that stores in the attemperater from the energy-conservation low-temperature low-pressure refrigerant that comes out of electric expansion valve, the low pressure refrigerant after the gasification further is reheated to send into after the uniform temperature and is used for defrosting in the outdoor heat exchanger coil pipe.Because during defrosting, cross valve does not commutate, influence is not received in the indoor heat supply, overcome the sometimes hot and sometimes cold phenomenon that traditional electrically driven (operated) heat pump air conditioner unit is had when defrosting, the heat that consumes in the defrost process is the waste heat from system recoveries all simultaneously, has improved the energy utilization rate of system.
Apparatus of the present invention realize as follows:
The defroster of the described motor driven heat pump air conditioner of apparatus of the present invention unit comprises a cover heat supply defrosting circulating system, a cover water circulation system; The heat supply defrosting circulating system links to each other with water circulation system by attemperater, and the heat supply defrosting circulating system links to each other with control system by circuit with water circulation system.
Described heat supply defrosting circulating system is to be formed by connecting by pipeline by gas engine, compressor, gas-liquid separator, four-way change-over valve, indoor heat exchanger, electric expansion valve, off-premises station heat exchanger, attemperater etc., the outside at the indoor set heat exchanger is provided with indoor machine fan, is provided with outdoor machine fan in the outer survey of off-premises station heat exchanger.
Described water circulation system is that engine, stop valve, flow control valve, attemperater etc. are formed by connecting by pipeline by water pump, flue gas heat recovery device; In water circulation system, be provided with a branch road that is in parallel with attemperater, this branch road is to be connected in series by stop valve and radiator.
In the heat supply defrosting circulating system, the power output of gas engine connects compressor, the refrigerant outlet pipe of compressor connects the inlet tube of oil eliminator, the arrival end A of the output termination four-way change-over valve of oil eliminator, the 3rd output D of first port of export B of four-way change-over valve and indoor heat exchanger, electric expansion valve, triple valve, attemperater, the 3rd stop valve, off-premises station heat exchanger, four-way change-over valve is connected in series in proper order, the second output C of four-way change-over valve links to each other with the gas-liquid separator inlet, and the gas-liquid separator port of export links to each other with the suction port of compressor end; In cooling water recirculation system, the cooling water pipe outlet of engine is divided into two-way, first stop valve of leading up to connects hot water inlet's pipe of attemperater, another road connects hot water inlet's pipe of hot-water radiator by second stop valve, the outlet of the hot water outlet pipe of hot-water radiator, the hot water outlet pipe of attemperater and second flow control valve synthetic one tunnel, link to each other with the cooling water inlet pipe of flue gas heat exchange device, the cooling water outlet pipe of flue gas heat exchange device communicates with the cooling water inlet pipe of engine by pump; The heat supply defrosting circulating system links to each other with cooling water recirculation system by attemperater.
Described control system is made up of a plurality of sensors and control centre, and its sensor is: be provided with the coil temperature sensor that is used for machine heat exchanger coil temperature outside the sensing chamber on off-premises station air source heat exchanger; Be provided with the temperature sensor that is used for sensing chamber's external environment in off-premises station heat exchanger outside; Be provided with the cooling-water temperature sensor that is used to detect cooling water temperature at the engine export place; Between compressor and oil eliminator, be provided for detecting high-pressure sensor from the high temperature and high pressure gas pressure of compressor discharge; The above sensor links to each other with control centre by circuit; In addition, outdoor machine fan, indoor machine fan, electric expansion valve in the described heat supply defrosting circulating system, and the cooling water stop valve in the water circulation system also is connected with control centre by circuit.In the operation of heat pump process, the detected temperature of environment temperature sensor is T1, the detected temperature of coil temperature sensor is T2, the temperature that cooling-water temperature sensor detects is T3, and the detected pressure of high-pressure sensor is P1, works as T1, T2, T3 when P1 and running time T satisfy regulation requirement (artificially setting in control centre), just carries out heat supply or Defrost operation.
Beneficial effect: beneficial effect of the present invention has:
(1) apparatus of the present invention are in defrost process, and cross valve does not commutate, and the indoor heat supply is unaffected, solved traditional electricity and driven the sometimes hot and sometimes cold phenomenon of heat pump air conditioner unit indoor temperature in defrost process.
(2) apparatus of the present invention organically combine UTILIZATION OF VESIDUAL HEAT IN technology and Defrost, have strengthened the UTILIZATION OF VESIDUAL HEAT IN of heat pump air conditioner unit, have improved the primary energy ratio of gas engine heat pump system.
(3) apparatus of the present invention can not only realize heat pump or cooling condition when the operation of non-defrosting weather, can also be round-the-clock, continue hot-water supply, and the hot water temperature can reach about 70 ℃.
Description of drawings
Fig. 1 is a structural representation of the present invention.Wherein have: engine 1, compressor 2, gas-liquid separator 3, oil eliminator 4, four-way change-over valve 5, electric expansion valve 6, indoor heat exchanger 7, flue gas heat exchange device 8, hot-water radiator 9, outdoor heat exchanger 10, attemperater 11, first stop valve 12, second stop valve 13, the 3rd stop valve 14, first flow control valve 15, second flow control valve 16, triple valve 17, water pump 18.
The specific embodiment
As shown in Figure 1, the novel defroster of gas engine driven heat pump of the present invention comprises a heat supply defrosting circulating system, a cooling water recirculation system and a control system; The heat supply defrosting circulating system links to each other with cooling water recirculation system by attemperater 11, and the heat supply defrosting circulating system links to each other with control system by circuit with cooling water recirculation system.
Described heat supply defrosting circulating system is to be formed by connecting by pipeline by gas engine 1, compressor 2, gas-liquid separator 3, oil eliminator 4, cross valve 5, electric expansion valve 6, indoor heat exchanger 7, outdoor heat exchanger 10, attemperater 11, the 3rd stop valve 14 and triple valve 17 etc.
Described cooling water recirculation system is to be formed by connecting by pipeline by first stop valve 12, second stop valve 13, hot-water radiator 9, first flow control valve 15, second flow control valve 16, attemperater 11, flue gas heat exchange device 8 and water pump 18 etc.; Wherein attemperater 11 is in parallel with hot-water radiator 9.
This device comprises a cover heat supply defrosting circulating system, a jacket water circulatory system; In the heat supply defrosting circulating system, the power output of gas engine 1 connects compressor 2, the refrigerant outlet pipe of compressor 2 connects the inlet tube of oil eliminator 4, the arrival end A of the output termination four-way change-over valve 5 of oil eliminator 4, first port of export B and the indoor heat exchanger 7 of four-way change-over valve 5, electric expansion valve 6, triple valve 17, attemperater 11, the 3rd stop valve 14, off-premises station heat exchanger 10, the 3rd output D of four-way change-over valve 5 is connected in series in proper order, the second output C of four-way change-over valve 5 links to each other with gas-liquid separator 3 inlets, and gas-liquid separator 3 ports of export link to each other with the suction port of compressor end; In cooling water recirculation system, the cooling water pipe outlet of engine 1 is divided into two-way, first stop valve 12 of leading up to connects hot water inlet's pipe of attemperater 11, another road connects hot water inlet's pipe of hot-water radiator 9 by second stop valve 13, the outlet of the hot water outlet pipe of the hot water outlet pipe of hot-water radiator 9, attemperater 11 and second flow control valve 16 synthetic one tunnel, link to each other with the cooling water inlet pipe of flue gas heat exchange device 8, the cooling water outlet pipe of flue gas heat exchange device 8 communicates with the cooling water inlet pipe of engine 1 by pump 18; The heat supply defrosting circulating system links to each other with cooling water recirculation system by attemperater 11.
Described control system is made up of a plurality of sensors and control centre, and its sensor is: be provided with the temperature sensor that is used to detect outdoor heat exchanger 10 coil temperatures on outdoor heat exchanger 10; Be provided with the temperature sensor that is used to detect outdoor environment temperature in outdoor heat exchanger 10 outsides; Be provided with the cooling-water temperature sensor that is used to detect cooling water temperature in engine 1 exit; On the pipeline between compressor 2 and the oil eliminator 4, be provided with the high-pressure sensor that is used to detect Compressor Discharge Pressure; Above-described sensor links to each other with control centre by circuit; In addition, outdoor machine fan in the described heat supply defrosting circulating system, indoor machine fan, electric expansion valve 6, the 3rd stop valve 14, triple valve 17, and first stop valve 12, second stop valve 13, first flow control valve 15, second flow control valve 16 and water pump 18 etc. in the cooling water recirculation system also link to each other with control centre by circuit.In the operation of heat pump process, the detected temperature of environment temperature sensor is T1, the detected temperature of coil temperature sensor is T2, the temperature that cooling-water temperature sensor detects is T3, and the detected pressure of high-pressure sensor is P1, works as T1, T2, T3 when P1 and running time T meet certain requirements (artificially setting in control centre), just carries out heat supply running; Work as T1, T2, T3 when P1 and running time T satisfy another requirement (artificially setting in control centre), just carries out Defrost operation.
Defrost operation is to bring into operation after the heat supply defrosting circulating system is received the defrosting order of control centre, under the control of control centre, will close the fan of outdoor heat exchanger 10; The two ends of triple valve 17 communicate with indoor and attemperater respectively, and the 3rd stop valve 14 is opened.The first flow control valve 15 and second flow control valve 16 are closed.The detailed process of Defrost operation is as shown in Figure 1: the high pressure-temperature gas refrigerant that compressor 2 is discharged through oil eliminator 4 and cross valve 5 after, enter indoor heat exchanger 7 by tube connector, behind the gaseous refrigerant cooling condensation, after electric expansion valve 6 throttlings, low-temp low-pressure gas-liquid two-phase cold-producing medium is after tube connector arrives triple valve 17, be fed in the attemperater, it is overheated that cold-producing medium is gasified, and again after the heat through sending into defrosting in the outdoor heat exchanger 10 behind the 3rd stop valve 14, send in the gas-liquid separator 3 through four-way change-over valve 5 after the refrigerant cools, cold-producing medium enters compressor 2 after separating, finish a defrost cycle.This defrost cycle is to utilize the waste heat of system recoveries to defrost, and in defrost process, cross valve 5 does not commutate.
During heat supply running, behind the high pressure-temperature gas refrigerant process oil eliminator 4 and cross valve 5 that compressor 2 is discharged, enter indoor heat exchanger 7 by tube connector, behind the gaseous refrigerant cooling condensation, after electric expansion valve 6 throttlings, low-temp low-pressure gas-liquid two-phase cold-producing medium is after tube connector arrives triple valve 17, be fed to and send into evaporation gasification in the outdoor heat exchanger 10, send in the gas-liquid separator 3 through four-way change-over valve 5 after the cold-producing medium gasification, cold-producing medium enters compressor 2 after separating, finish a heat supply circulation.
Defrosting operating method is: the fan of closing outdoor heat exchanger 10, triple valve 17 two ends communicate with electric expansion valve 6 and attemperater 11 respectively, first stop valve 12 is open-minded, second stop valve 13 is closed, the 3rd stop valve 14 is open-minded, first flow control valve 15 cuts out, and second flow control valve 16 cuts out.

Claims (1)

1. the defroster of a gas engine driven heat pump is characterized in that this device comprises a cover heat supply defrosting circulating system, a jacket water circulatory system; In the heat supply defrosting circulating system, the power output of gas engine (1) connects compressor (2), the refrigerant outlet pipe of compressor (2) connects the inlet tube of oil eliminator (4), the arrival end A of the output termination four-way change-over valve (5) of oil eliminator (4), first port of export B of four-way change-over valve (5) and indoor heat exchanger (7), electric expansion valve (6), triple valve (17), attemperater (11), the 3rd stop valve (14), off-premises station heat exchanger (10), the 3rd output D of four-way change-over valve (5) is connected in series in proper order, the second output C of four-way change-over valve (5) links to each other with gas-liquid separator (3) inlet, and gas-liquid separator (3) port of export links to each other with the suction port of compressor end; In cooling water recirculation system, the cooling water pipe outlet of engine (1) is divided into two-way, first stop valve (12) of leading up to connects hot water inlet's pipe of attemperater (11), another road connects hot water inlet's pipe of hot-water radiator (9) by second stop valve (13), the hot water outlet pipe of hot-water radiator (9), the outlet of the hot water outlet pipe of attemperater (11) and second flow control valve (16) synthetic one tunnel, link to each other with the cooling water inlet pipe of flue gas heat exchange device (8), the cooling water outlet pipe of flue gas heat exchange device (8) communicates by the cooling water inlet pipe of water pump (18) with engine (1); The heat supply defrosting circulating system links to each other with cooling water recirculation system by attemperater (11).
CNB2006100415359A 2006-09-13 2006-09-13 Gas engine driven heat pump defrosting device Expired - Fee Related CN100494832C (en)

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Application Number Priority Date Filing Date Title
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CN100494832C CN100494832C (en) 2009-06-03

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102003835A (en) * 2010-12-17 2011-04-06 吴昊 Scanning defrost type air-source gas heat pump
CN103075804A (en) * 2013-01-09 2013-05-01 天津大学 Electric-free gas heat-pump water heater
CN103574969A (en) * 2013-11-04 2014-02-12 美的集团武汉制冷设备有限公司 Air conditioning system
CN103953992A (en) * 2014-05-05 2014-07-30 重庆大学 Low temperature resistant fuel gas heat pump air-conditioning system combiningwaste heat recovery mode and liquid dehumidification mode
CN104101143A (en) * 2014-06-24 2014-10-15 美的集团武汉制冷设备有限公司 Air conditioner and control method thereof
CN105783145A (en) * 2015-01-12 2016-07-20 Lg电子株式会社 Air conditioner and method for controlling an air conditioner
CN107763772A (en) * 2017-10-26 2018-03-06 中国科学院广州能源研究所 A kind of gas-fired heat pump waste heat automatic defrosting system
US10054348B2 (en) 2015-01-12 2018-08-21 Lg Electronics Inc. Air conditioner
CN108592455A (en) * 2018-04-20 2018-09-28 成都爱信智能技术有限责任公司 A kind of internal combustion engine driving self-powered type heat pump apparatus of air source
US10527333B2 (en) 2015-01-12 2020-01-07 Lg Electronics Inc. Air conditioner and method for controlling an air conditioner
CN111336684A (en) * 2020-03-19 2020-06-26 宁波市成大机械研究所 Environment-friendly defrosting type air source gas heat pump
WO2020177275A1 (en) * 2019-03-04 2020-09-10 南京天加环境科技有限公司 Gas heat pump air-conditioning system having non-stop defrosting

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102003835A (en) * 2010-12-17 2011-04-06 吴昊 Scanning defrost type air-source gas heat pump
CN102003835B (en) * 2010-12-17 2012-10-17 吴昊 Scanning defrost type air-source gas heat pump
CN103075804A (en) * 2013-01-09 2013-05-01 天津大学 Electric-free gas heat-pump water heater
CN103075804B (en) * 2013-01-09 2015-10-28 天津大学 De-electric gas-fired heat pump water heater
CN103574969A (en) * 2013-11-04 2014-02-12 美的集团武汉制冷设备有限公司 Air conditioning system
CN103574969B (en) * 2013-11-04 2016-06-01 美的集团武汉制冷设备有限公司 Air-conditioning system
CN103953992A (en) * 2014-05-05 2014-07-30 重庆大学 Low temperature resistant fuel gas heat pump air-conditioning system combiningwaste heat recovery mode and liquid dehumidification mode
CN104101143A (en) * 2014-06-24 2014-10-15 美的集团武汉制冷设备有限公司 Air conditioner and control method thereof
CN105783145A (en) * 2015-01-12 2016-07-20 Lg电子株式会社 Air conditioner and method for controlling an air conditioner
US10054348B2 (en) 2015-01-12 2018-08-21 Lg Electronics Inc. Air conditioner
US10527333B2 (en) 2015-01-12 2020-01-07 Lg Electronics Inc. Air conditioner and method for controlling an air conditioner
CN105783145B (en) * 2015-01-12 2020-07-10 Lg电子株式会社 Air conditioner and control method thereof
CN107763772A (en) * 2017-10-26 2018-03-06 中国科学院广州能源研究所 A kind of gas-fired heat pump waste heat automatic defrosting system
CN108592455A (en) * 2018-04-20 2018-09-28 成都爱信智能技术有限责任公司 A kind of internal combustion engine driving self-powered type heat pump apparatus of air source
WO2020177275A1 (en) * 2019-03-04 2020-09-10 南京天加环境科技有限公司 Gas heat pump air-conditioning system having non-stop defrosting
CN111336684A (en) * 2020-03-19 2020-06-26 宁波市成大机械研究所 Environment-friendly defrosting type air source gas heat pump

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