CN101435638A - Air source heat pump system capable of continuously supplying heat by refrigerant super cooling defrost - Google Patents
Air source heat pump system capable of continuously supplying heat by refrigerant super cooling defrost Download PDFInfo
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- CN101435638A CN101435638A CNA2008102098051A CN200810209805A CN101435638A CN 101435638 A CN101435638 A CN 101435638A CN A2008102098051 A CNA2008102098051 A CN A2008102098051A CN 200810209805 A CN200810209805 A CN 200810209805A CN 101435638 A CN101435638 A CN 101435638A
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Abstract
The invention discloses an air source heat pump system for continuous heat supply through utilizing the undercooling and defrosting of a cryogen and relates to an air source heat pump system. The system effectively solves the problems that the prior defrosting mode has drastic change of air suction pressure, reduces the heating load indoors, stops heat supply indoors and blows cold wind indoors in the defrosting process. The outlet end of a compressor is communicated with a first port of a four-way reversing valve; a second port of the four-way reversing valve is communicated with the inlet end of an indoor machine; the outlet end of the indoor machine is respectively communicated with one end of a first bypass shunt circuit, one end of a second bypass shunt circuit and one end of a third bypass shunt circuit; one end of the first bypass shunt circuit is provided with a seventh decompression valve; one end of the second bypass shunt circuit is provided with an eighth decompression valve; and one end of the third bypass shunt circuit is provided with a ninth decompression valve. The system realizes unintermittent heat supply in the defrosting process, reduces drastic change of air suction pressure of the compressor, is more stable in the conversion process of heat supply and defrosting and well removes the influence on the heating load indoors in the prior hot air bypass defrosting.
Description
Technical field
The present invention relates to a kind of air source heat pump system.
Background technology
Air source heat pump receives increasing concern as a kind of heat-supplying mode of energy-conserving and environment-protective.But in running, there is the frosting phenomenon in the unit outdoor machine part.The existence of frost layer has had a strong impact on the heating performance of unit.Therefore need in time the frost layer to be removed.How to realize defrosting timely and effectively and become a urgently open question.Existing Defrost mode is a lot, but all has problem in various degree, sums up and gets up to mainly contain following problem: 1, natural Defrost mode, need interrupt compressor operating during defrosting, and just can move when requiring outside air temperature to be higher than 2～3 ℃, limitation is big.2, electric defrosting mode, what consumed is high-quality electric energy, energy utilizes unreasonable, defrosting expense height.3, waterpower Defrost mode need be provided with water system, and defrosting when finishing moisture big, quicken frosting once more easily.4, reverse cycle defrosting mode, in the defrost process, indoor set is as evaporimeter, from indoor heat-obtaining.On the one hand, heat pump stops to indoor heating, and on the other hand, from indoor heat-obtaining, indoor set is blown a cold wind over.Defrosting time is long, indoor comfort poor (Huang Dong, Yuan Xiuling, the defrosting of air-cooled heat pump water chiller-heater units hot-gas bypass and reverse cycle defrosting performance comparison [J], XI AN JIAOTONG UNIVERSITY Subject Index, 2006,5:539～543).5, hot-gas bypass Defrost mode, the defrosting energy has reduced to the indoor heating amount from the high-temperature exhaust air of compressor; and defrosting time is long; suction superheat is low, simultaneously, and high-temperature exhaust air pressure height; compressor is produced certain impact; the safety of crisis compressor (Shi Wenxing, Li Xianting, Shao Shuanquan, the defrosting of room air conditioner hot-gas bypass method is analyzed and experimental study [J], the refrigeration journal; 2000,2:29～35).In existing Defrost mode, hot-gas bypass defrosting and reverse cycle defrosting are two kinds of most widely used Defrost modes.
Summary of the invention
The present invention is in order to solve existing Defrost mode and to exist pressure of inspiration(Pi) to change violent in defrost process and reduce and stop heat supply and to the problem of blows cold wind indoors to the indoor heating amount, but and then provides a kind of air source heat pump system that utilizes cold-producing medium to cross the continuous heat supply of cold defrosting.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: described air source heat pump system comprises compressor, four-way change-over valve, indoor set, throttle mechanism, off-premises station and gas-liquid separator, and described air source heat pump system also comprises first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 7th pressure-reducing valve, the 8th pressure-reducing valve, the 9th pressure-reducing valve and defrosting branch road assembly; Defrosting branch road assembly is made of the 4th magnetic valve, the 5th magnetic valve, the 6th magnetic valve, defrosting branch road, first fen branch road, second fen branch road and the 3rd fen branch road; Branch road was provided with the 6th magnetic valve in first minute, and branch road was provided with the 5th magnetic valve in second minute, and branch road was provided with the 4th magnetic valve in the 3rd minute; Be provided with in the described off-premises station first circuitous along separate routes, second along separate routes circuitous and the 3rd along separate routes circuitous; The port of export of compressor is communicated with first port of four-way change-over valve, second port of four-way change-over valve is communicated with the arrival end of indoor set, the port of export of indoor set is by a throttle mechanism and first a circuitous end along separate routes, a second circuitous end and the 3rd circuitous end along separate routes along separate routes is communicated with respectively, a first circuitous end along separate routes is provided with the 7th pressure-reducing valve, a second circuitous end along separate routes is provided with the 8th pressure-reducing valve, the 3rd a circuitous end along separate routes is provided with the 9th pressure-reducing valve, the first circuitous other end along separate routes, the second circuitous other end and the 3rd circuitous other end along separate routes along separate routes all is communicated with the 3rd port of four-way change-over valve, the first circuitous other end along separate routes is provided with first magnetic valve, the second circuitous other end along separate routes is provided with second magnetic valve, and the 3rd circuitous other end along separate routes is provided with the 3rd magnetic valve; The 4th port of four-way change-over valve is communicated with the arrival end of gas-liquid separator, and the port of export of gas-liquid separator is communicated with the arrival end of compressor; One end of defrosting branch road and indoor set are to the pipeline connection between the throttle mechanism, one end of one end of the other end and first fen branch road of defrosting branch road, second fen branch road and an end of the 3rd fen branch road are communicated with respectively, the other end of first fen branch road is communicated with the first circuitous shunt that is positioned at the first electromagnetic valve entrance end, the other end of second fen branch road is communicated with the second circuitous shunt that is positioned at the second electromagnetic valve entrance end, and the other end of the 3rd fen branch road is communicated with the 3rd circuitous shunt that is positioned at the 3rd electromagnetic valve entrance end.
The invention has the beneficial effects as follows: the present invention is on the basis of original hot-gas bypass defrosting, system is improved, when having realized in the defrost process intermittently supplying heat, reduced the acute variation of compressor air suction pressure, system is more stable in the transfer process of heat supply and defrosting, simultaneously from the high-temperature liquid state cold-producing medium of indoor set outlet as the defrosting origin of heat, thereby when well having eliminated conventional hot-gas bypass defrosting to the influence of indoor heating amount.Concrete advantage of the present invention is mainly reflected in the following aspects: 1, conventional relatively hot-gas bypass defrost system, only increase several valves and one section throttle mechanism copper pipe to the off-premises station port of export, so the system architecture advantages of simple, the cost cost is low; 2, therefore the defrosting energy does not have to consume to be used for the heat of indoor set heat supply, thereby has guaranteed the carrying out of heat supply from the heat of the condensating refrigerant of off-premises station outlet, has improved indoor comfort degree; 3, realize the defrosting of branch loop, thereby can shorten defrosting time, improved suction superheat, improved defrosting effect; 4, the cold-producing medium after the defrosting comes back to the off-premises station entrance point after pressure-reducing valve, mix with cold-producing medium after the normal throttling, and then through the off-premises station heat-obtaining.Well avoided because of directly getting back to the compression shock that compressor causes system.
Description of drawings
Fig. 1 is a principle schematic of the present invention.
The specific embodiment
The specific embodiment one: as shown in Figure 1, but the described air source heat pump system that utilizes cold-producing medium to cross the continuous heat supply of cold defrosting of present embodiment comprises compressor 1, four-way change-over valve 2, indoor set 3, throttle mechanism 4, off-premises station 5 and gas-liquid separator 6, and described air source heat pump system also comprises the first magnetic valve F1, the second magnetic valve F2, the 3rd magnetic valve F3, the 7th pressure-reducing valve F7, the 8th pressure-reducing valve F8, the 9th pressure-reducing valve F9 and defrosting branch road assembly; Defrosting branch road assembly is made of the 4th magnetic valve F4, the 5th magnetic valve F5, the 6th magnetic valve F6, defrosting branch road 8, first minute branch road 8-1, second fen branch road 8-2 and the 3rd fen branch road 8-3; Branch road 8-1 was provided with the 6th magnetic valve F6 in first minute, and branch road 8-2 was provided with the 5th magnetic valve F5 in second minute, and branch road 8-3 was provided with the 4th magnetic valve F4 in the 3rd minute; Be provided with the first circuitous 5-1 along separate routes, the second circuitous 5-2 along separate routes and the 3rd circuitous 5-3 along separate routes in the described off-premises station 5; The port of export of compressor 1 is communicated with the first port A of four-way change-over valve 2, the second port B of four-way change-over valve 2 is communicated with the arrival end of indoor set 3, the port of export of indoor set 3 is by a throttle mechanism 4 and the first circuitous end of 5-1 along separate routes, the end of the second circuitous 5-2 along separate routes and the 3rd circuitous end of 5-3 along separate routes are communicated with respectively, the first circuitous end of 5-1 along separate routes is provided with the 7th pressure-reducing valve F7, the second circuitous end of 5-2 along separate routes is provided with the 8th pressure-reducing valve F8, the 3rd circuitous end of 5-3 along separate routes is provided with the 9th pressure-reducing valve F9, the first circuitous other end of 5-1 along separate routes, the other end of the second circuitous 5-2 along separate routes and the 3rd circuitous other end of 5-3 along separate routes all are communicated with the 3rd port C of four-way change-over valve 2, the first circuitous other end of 5-1 along separate routes is provided with the first magnetic valve F1, the second circuitous other end of 5-2 along separate routes is provided with the second magnetic valve F2, and the 3rd circuitous other end of 5-3 along separate routes is provided with the 3rd magnetic valve F3; The 4th port D of four-way change-over valve 2 is communicated with the arrival end of gas-liquid separator 6, and the port of export of gas-liquid separator 6 is communicated with the arrival end of compressor 1; One end of defrosting branch road 8 and indoor set 3 are to the pipeline connection between the throttle mechanism 4, the other end of defrosting branch road 8 and the end of first fen branch road 8-1, the end of the end of second fen branch road 8-2 and the 3rd fen branch road 8-3 is communicated with respectively, the other end of first fen branch road 8-1 is communicated with the first circuitous 5-1 along separate routes that is positioned at first magnetic valve F1 inlet end, the other end of second fen branch road 8-2 is communicated with the second circuitous 5-2 along separate routes that is positioned at second magnetic valve F2 inlet end, and the other end of the 3rd fen branch road 8-3 is communicated with the 3rd circuitous 5-3 along separate routes that is positioned at the 3rd magnetic valve F3 inlet end.
In defrost process, off-premises station is carried out branch loop defrosting (being provided with the first circuitous 5-1 along separate routes, the second circuitous 5-2 along separate routes and the 3rd circuitous 5-3 along separate routes in the off-premises station 5).In the process of a loop defrosting, other loop can carry out normal heat supply.Present embodiment is divided into three loops with off-premises station 5, as shown in Figure 1.At first heat release on indoor set 3 of high temperature (high pressure) gaseous refrigerant by compressor 1 discharge, finishing a liquid refrigerant part after the heat release is bypassed to first of loop exit on the off-premises station 5 and circuitously carries out local reverse cycle defrosting in the 5-1 along separate routes, cold-producing medium after the defrosting after the refrigerant mixed of pressure-reducing valve decompression back and the second circuitous 5-2 along separate routes and the 3rd circuitous 5-3 import along separate routes again through the second circuitous 5-2 along separate routes and the 3rd circuitous shunt 5-3 through off-premises station 5 heat-obtainings, get back to compressor 1 afterwards.The defrosting and first of the second circuitous 5-2 along separate routes, the 3rd circuitous 5-3 is along separate routes made a circulation, and 5-1 is identical along separate routes.This kind Defrost mode utilizes the energy source of the heat of condensating refrigerant as defrosting.After defrosting is finished, cold-producing medium through pressure-reducing valve again with the refrigerant mixed of other normal heat supply loop.On the one hand, to the influence of indoor heating, on the other hand, compressor air suction pressure changes violent problem when also well having solved conventional hot-gas bypass defrosting when having eliminated the defrosting of conventional hot-gas bypass.
The specific embodiment two: as shown in Figure 1, the described air source heat pump system of present embodiment also comprises drier 9, and described drier 9 is arranged on the pipeline between indoor set 3 and the throttle mechanism 4.Drier 9 can be removed the materials such as moisture content in the cold-producing medium.Other composition and annexation are identical with the specific embodiment one.
Operation principle:
When heat pump is in the heat supply state, the first magnetic valve F1, the second magnetic valve F2, the 3rd magnetic valve F3, the 7th pressure-reducing valve F7, the 8th pressure-reducing valve F8 and the 9th pressure-reducing valve F9 all stay open state, and the 4th magnetic valve F4, the 5th magnetic valve F5 and the 6th magnetic valve F6 keep closed condition; High temperature (high pressure) gas refrigerant that compressor 1 is discharged becomes the low-temp low-pressure liquid refrigerant through throttle mechanism 4 after indoor set 3 heat releases, low-temperature refrigerant enters off-premises station in off-premises station 5 inlet punishment three tunnel and absorbs heat, and gets back in the compressor 1 after three tunnel cryogenic gaseous cold-producing mediums converge.Finish a heat supply cyclic process.
When heat pump is in defrost state, simultaneously off-premises station is carried out the defrosting of branch loop, the first circuitous 5-1 along separate routes defrosting describes for example.The defrost process and first of the second circuitous 5-2 along separate routes and the 3rd circuitous 5-3 is along separate routes made a circulation, and 5-1 is identical along separate routes.High temperature (high pressure) gas refrigerant that compressor 1 is discharged is after indoor set 3 heat releases, and part of refrigerant is bypassed to the exit of off-premises station 5 by the branch road 8 that defrosts, and this moment, the 6th magnetic valve F6, the second magnetic valve F2 and the 3rd magnetic valve F3 stayed open state; The first magnetic valve F1, the 4th magnetic valve F4 and the 5th magnetic valve F5 keep closing.Being entered the circuitous 5-1 along separate routes of first in the off-premises station by the high temperature refrigerant of bypass defrosts, after reducing pressure through pressure-reducing valve F7, cold-producing medium after the defrosting comes back to the entrance point of off-premises station 5, converge with normal cold-producing medium behind throttle mechanism 4, and then the flow through second circuitous 5-2 along separate routes and the 3rd circuitous 5-3 along separate routes enter off-premises station 5 heat-obtainings, gets back to afterwards in the compressor 1.The defrost process of middle and lower part loop is identical with the process of top loop, and the switching by valve can realize.When the second circuitous shunt 5-2 defrosted, the 5th magnetic valve F5, the first magnetic valve F1 and the 3rd magnetic valve F3 stayed open; The second magnetic valve F2, the 6th magnetic valve F6 and the 4th magnetic valve F4 keep closing.When the 3rd circuitous shunt 5-3 defrosted, the 4th magnetic valve F4, the first magnetic valve F1 and the second magnetic valve F2 stayed open; The 3rd magnetic valve F3, the 6th magnetic valve F6 and the 5th magnetic valve F5 keep closing.In defrost process, the pressure-reducing valve of defrosting loop is for decompression state, and other loop is in open mode.Under this Defrost mode, on the one hand can realize the uninterrupted heat supply of indoor set in defrost process, on the other hand, the defrosting energy is from the condensating refrigerant of the indoor set port of export, when having eliminated conventional defrosting to the influence of indoor heating.
Claims (2)
- But 1, a kind of air source heat pump system that utilizes cold-producing medium to cross the continuous heat supply of cold defrosting, described air source heat pump system comprises compressor (1), four-way change-over valve (2), indoor set (3), throttle mechanism (4), off-premises station (5) and gas-liquid separator (6), it is characterized in that: described air source heat pump system also comprises first magnetic valve (F1), second magnetic valve (F2), the 3rd magnetic valve (F3), the 7th pressure-reducing valve (F7), the 8th pressure-reducing valve (F8), the 9th pressure-reducing valve (F9) and defrosting branch road assembly; Defrosting branch road assembly is by the 4th magnetic valve (F4), the 5th magnetic valve (F5), the 6th magnetic valve (F6), defrosting branch road (8), first fen branch road (8-1), second fen branch road (8-2) and the 3rd fen branch road (8-3) formation; First minute branch road (8-1) be provided with the 6th magnetic valve (F6), second minute branch road (8-2) be provided with the 5th magnetic valve (F5), the 3rd minute branch road (8-3) be provided with the 4th magnetic valve (F4); Be provided with first circuitous (5-1) along separate routes, second circuitous (5-2) along separate routes and the 3rd circuitous (5-3) along separate routes in the described off-premises station (5); The port of export of compressor (1) is communicated with first port (A) of four-way change-over valve (2), second port (B) of four-way change-over valve (2) is communicated with the arrival end of indoor set (3), the port of export of indoor set (3) is by the throttle mechanism (4) and the first circuitous end of (5-1) along separate routes, one end of second circuitous (5-2) along separate routes and the 3rd a circuitous end of (5-3) along separate routes are communicated with respectively, the first circuitous end of (5-1) along separate routes is provided with the 7th pressure-reducing valve (F7), the second circuitous end of (5-2) along separate routes is provided with the 8th pressure-reducing valve (F8), the 3rd a circuitous end of (5-3) along separate routes is provided with the 9th pressure-reducing valve (F9), the first circuitous other end of (5-1) along separate routes, the other end of second circuitous (5-2) along separate routes and the 3rd circuitous other end of (5-3) along separate routes all are communicated with the 3rd port (C) of four-way change-over valve (2), the first circuitous other end of (5-1) along separate routes is provided with first magnetic valve (F1), the second circuitous other end of (5-2) along separate routes is provided with second magnetic valve (F2), and the 3rd circuitous other end of (5-3) along separate routes is provided with the 3rd magnetic valve (F3); The 4th port (D) of four-way change-over valve (2) is communicated with the arrival end of gas-liquid separator (6), and the port of export of gas-liquid separator (6) is communicated with the arrival end of compressor (1); One end of defrosting branch road (8) and indoor set (3) are to the pipeline connection between the throttle mechanism (4), the defrosting branch road (8) the other end and first minute branch road (8-1) an end, second minute branch road (8-2) an end and the 3rd minute branch road (8-3) an end be communicated with respectively, first minute branch road (8-1) the other end be communicated with first circuitous (5-1) along separate routes that is positioned at first magnetic valve (F1) inlet end, second minute branch road (8-2) the other end is communicated with second circuitous (5-2) along separate routes that is positioned at second magnetic valve (F2) inlet end, the 3rd minute branch road (8-3) the other end be communicated with the 3rd shunt (5-3) of making a circulation that is positioned at the 3rd magnetic valve (F3) inlet end.
- But 2, the air source heat pump system that utilizes cold-producing medium to cross the continuous heat supply of cold defrosting according to claim 1, it is characterized in that: described air source heat pump system also comprises drier (9), and described drier (9) is arranged on the pipeline between indoor set (3) and the throttle mechanism (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102098051A CN101435638A (en) | 2008-12-26 | 2008-12-26 | Air source heat pump system capable of continuously supplying heat by refrigerant super cooling defrost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102098051A CN101435638A (en) | 2008-12-26 | 2008-12-26 | Air source heat pump system capable of continuously supplying heat by refrigerant super cooling defrost |
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| CN101435638A true CN101435638A (en) | 2009-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008102098051A Pending CN101435638A (en) | 2008-12-26 | 2008-12-26 | Air source heat pump system capable of continuously supplying heat by refrigerant super cooling defrost |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914047A (en) * | 2012-11-15 | 2013-02-06 | 浙江正理生能科技有限公司 | Air source heat pump water heater |
| CN104776657A (en) * | 2014-01-11 | 2015-07-15 | 苏州恒兆空调节能科技有限公司 | Defrosting device, defrosting method and air conditioner provided with defrosting device |
| CN106907877A (en) * | 2017-03-10 | 2017-06-30 | 南京理工大学 | A kind of double evaporators replace defrosting net for air-source heat pump units and its Defrost method |
| CN107076476A (en) * | 2014-04-23 | 2017-08-18 | 特灵空调系统(中国)有限公司 | Variable refrigerant HVAC system with independent defrosting |
| CN111426090A (en) * | 2020-03-24 | 2020-07-17 | 青岛海尔空调电子有限公司 | Control device, air-conditioning heat pump system and control method thereof |
| CN111811158A (en) * | 2019-04-10 | 2020-10-23 | 广东美芝制冷设备有限公司 | Air conditioner |
| CN113692518A (en) * | 2019-04-09 | 2021-11-23 | 东芝开利株式会社 | Air conditioner |
-
2008
- 2008-12-26 CN CNA2008102098051A patent/CN101435638A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914047A (en) * | 2012-11-15 | 2013-02-06 | 浙江正理生能科技有限公司 | Air source heat pump water heater |
| CN102914047B (en) * | 2012-11-15 | 2015-10-07 | 浙江正理生能科技有限公司 | Air source hot pump water heater |
| CN104776657A (en) * | 2014-01-11 | 2015-07-15 | 苏州恒兆空调节能科技有限公司 | Defrosting device, defrosting method and air conditioner provided with defrosting device |
| CN107076476A (en) * | 2014-04-23 | 2017-08-18 | 特灵空调系统(中国)有限公司 | Variable refrigerant HVAC system with independent defrosting |
| CN107076476B (en) * | 2014-04-23 | 2020-01-14 | 特灵空调系统(中国)有限公司 | Variable refrigerant HVAC system with independent defrost |
| CN106907877A (en) * | 2017-03-10 | 2017-06-30 | 南京理工大学 | A kind of double evaporators replace defrosting net for air-source heat pump units and its Defrost method |
| CN106907877B (en) * | 2017-03-10 | 2019-05-07 | 南京理工大学 | A kind of double evaporators alternately defrosting net for air-source heat pump units and its Defrost method |
| CN113692518A (en) * | 2019-04-09 | 2021-11-23 | 东芝开利株式会社 | Air conditioner |
| CN113692518B (en) * | 2019-04-09 | 2023-03-28 | 东芝开利株式会社 | Air conditioner |
| CN111811158A (en) * | 2019-04-10 | 2020-10-23 | 广东美芝制冷设备有限公司 | Air conditioner |
| CN111811158B (en) * | 2019-04-10 | 2021-11-23 | 广东美芝制冷设备有限公司 | Air conditioner |
| CN111426090A (en) * | 2020-03-24 | 2020-07-17 | 青岛海尔空调电子有限公司 | Control device, air-conditioning heat pump system and control method thereof |
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Open date: 20090520 |