CN105180536A - Defrosting device for heat pump water heater and method for defrosting through device - Google Patents
Defrosting device for heat pump water heater and method for defrosting through device Download PDFInfo
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- CN105180536A CN105180536A CN201510541353.7A CN201510541353A CN105180536A CN 105180536 A CN105180536 A CN 105180536A CN 201510541353 A CN201510541353 A CN 201510541353A CN 105180536 A CN105180536 A CN 105180536A
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- air cooler
- inlet pipe
- defrosting
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- water
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Abstract
The invention relates to the technical field of heat pump water heaters and discloses a defrosting device for a heat pump water heater. The defrosting device comprises a compressor, a gas inlet pipe of a hot water gas cooler, a gas inlet pipe of a regenerator, an expansion valve and an evaporator, wherein the compressor, the gas inlet pipe of the hot water gas cooler, the gas inlet pipe of the regenerator, the expansion valve and the evaporator are communicated in sequence. The evaporator is communicated with the compressor through a gas outlet pipe of the regenerator. A water inlet pipe of the hot water gas cooler is communicated with a water source. The gas inlet pipe of the hot water gas cooler is connected with a high-pressure gas inlet pipe of a defrosting gas cooler in parallel. A low-pressure gas inlet pipe and a low-pressure gas exhaust pipe of the defrosting gas cooler are communicated with the expansion valve and the evaporator respectively. When defrosting needs to be conducted through the defrosting device for the heat pump water heater, the low-pressure gas inlet pipe and the low-pressure gas exhaust pipe of the defrosting gas cooler are communicated with the expansion valve and the evaporator respectively, so that the influence of a conventional defrosting mode on the system is avoided, and stable operation of the system is guaranteed; besides, it is guaranteed that hot water can be produced while the trans-critical CO2 heat pump water heater system is defrosted. The defrosting device has the advantages of being simple in structure, convenient to operate and the like.
Description
Technical field
The present invention relates to heat pump water-heating machine technical field, particularly relate to a kind of heat pump water-heating machine defroster and apply the method for this device defrosting, particularly a kind of when defrosting can hot water preparing heat pump water-heating machine defroster and apply the method for this device defrosting.
Background technology
Existing heat pump water-heating machine defrosting is general adopts four-way change-over valve commutation, or takes the mode of hot-gas bypass to carry out.When adopting four-way change-over valve reversing mode to defrost, system antikinesis, now system not only can not hot water preparing, and on the contrary, because condenser is converted to evaporimeter, also likely cause Water in Water Tank temperature drop low, this Defrost mode is larger to system shock simultaneously; When taking hot-gas bypass mode to defrost, defrosting magnetic valve is opened, and compressor air-discharging directly enters evaporimeter through bypass line, thus reaches the object of defrosting.If environment temperature is lower, when defrosting is fast not, may occur that the protectiveness of main frame is shut down.
For transcritical CO_2 heat pump water-heating machine, because system operation pressure and temperature is all higher, no matter be take above-mentioned that mode to defrost, all very large to the impact of parts, be easy to cause the damage of parts and the leakage of system.Therefore the external general mode adopting expansion valve all to open defrosts, although adopt the method not have the drawback of above-mentioned Defrost mode, being also can not hot water preparing, causing the inconvenience with water when defrosting.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is existing Defrost mode, very large to the impact of parts, is easy to cause the damage of parts and the leakage of system.Adopting the method all opened of expansion valve to be also can not hot water preparing when defrosting, causing the problem of the inconvenience with water.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of heat pump water-heating machine defroster, it comprises: the air inlet pipe of the compressor be communicated with successively, hot water air cooler, the air inlet pipe of regenerator, expansion valve and evaporimeter, described evaporimeter is communicated with described compressor by the escape pipe of described regenerator, the water inlet pipe of described hot water air cooler is communicated with water source, the air inlet pipe of described hot water air cooler is in parallel with the high-pressure pipe of defrosting air cooler, and the low pressure air inlet and exhaust piper of described defrosting air cooler is communicated with described expansion valve and evaporimeter respectively.
Preferably, also comprise the triple valve that entrance point is communicated with described expansion valve, first port of export of described triple valve is communicated with described evaporimeter, and second port of export of described triple valve is communicated with the low-pressure inlet pipe of described defrosting air cooler.
Preferably, be provided with the first magnetic valve between described expansion valve and described evaporimeter, low-pressure inlet pipe and the described expansion valve junction of described defrosting air cooler are provided with the second magnetic valve.
Preferably, the high-pressure pipe of described defrosting air cooler is provided with magnetic valve, described magnetic valve is corresponding with described compressor to be arranged.
Preferably, the fluid reservoir between the blast pipe being arranged at described hot water air cooler and the air inlet pipe of described regenerator is also comprised.
Preferably, described water source is water tank, and the water inlet pipe of described hot water air cooler is provided with water pump.
The present invention also provides a kind of Defrost method applying heat pump water-heating machine defroster as above, and wherein, concrete steps are:
S1, set temperature value to, collect and process machine inlet temperature and inlet pressure, calculate compressor inlet degree of superheat dt, as degree of superheat dt>to, start defrosting and go to step S2, as dt<to, terminate defrosting and go to step S3;
Low-pressure inlet pipe and the low pressure exhaust pipe of S2, described defrosting air cooler are communicated with described expansion valve and evaporimeter respectively, the low-pressure inlet pipe of described defrosting air cooler and high-pressure pipe after heat exchange, defrost in high-temperature gas to described evaporimeter in described defrosting air cooler;
S3, described expansion valve and evaporimeter are communicated with, the air inlet pipe of described hot water air cooler and water inlet pipe heat exchange in described hot water air cooler of described hot water air cooler.
Preferably, be communicated with described expansion valve and evaporimeter respectively by triple valve by the low-pressure inlet pipe of described defrosting air cooler in step S2, or be communicated with described expansion valve and evaporimeter respectively by the second magnetic valve.
(3) beneficial effect
Technique scheme tool of the present invention has the following advantages: the evaporimeter in heat pump water-heating machine defroster provided by the invention is communicated with compressor by the escape pipe of regenerator, the water inlet pipe of hot water air cooler is communicated with water source, the air inlet pipe of hot water air cooler is in parallel with the high-pressure pipe of defrosting air cooler, and the low pressure air inlet and exhaust piper of defrosting air cooler is communicated with expansion valve and evaporimeter respectively.When heat pump water-heating machine defroster provided by the invention needs to defrost, low-pressure inlet pipe and the low pressure exhaust pipe of defrosting air cooler are communicated with expansion valve and evaporimeter respectively, not only avoid conventional defrost mode to the impact of system, ensure that the stable operation of system, and ensure that Trans-critical cycle CO
2heat pump water-heating machine system can hot water preparing while defrost; There is the advantages such as structure is simple, easy to operate.
Accompanying drawing explanation
Fig. 1 is the connection diagram of the heat pump water-heating machine defroster of the embodiment of the present invention one;
Fig. 2 is the connection diagram of hot water preparing in the heat pump water-heating machine defroster of the embodiment of the present invention one;
Fig. 3 is the connection diagram of defrost process in the heat pump water-heating machine defroster of the embodiment of the present invention one;
Fig. 4 is the structural representation of the heat pump water-heating machine defroster of the embodiment of the present invention two.
In figure: 1: compressor; 21: hot water air cooler; 22: defrosting air cooler; 3: regenerator; 4: expansion valve; 5: triple valve; 6: evaporimeter; 7: fluid reservoir; 8: magnetic valve; 9: water tank; 10: water pump; 11: inlet valve; 12: hot water outlet pipe; 51: the first magnetic valves; 52: the second magnetic valves; 53: entrance point; 54: the first ports of export; 55: the second ports of export.
Detailed description of the invention
In describing the invention, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the machine of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " is connected ", " connection " should be interpreted broadly, such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
As shown in Figure 1 to Figure 3, the heat pump water-heating machine defroster that the embodiment of the present invention provides, it comprises the compressor 1 be communicated with successively, the air inlet pipe of hot water air cooler 21, the air inlet pipe of regenerator 3, expansion valve 4 and evaporimeter 6, described evaporimeter 6 is communicated with described compressor 1 by the escape pipe of described regenerator 3, the water inlet pipe of described hot water air cooler 21 is communicated with water source, the air inlet pipe of described hot water air cooler 21 is in parallel with the high-pressure pipe of defrosting air cooler 22, the blast pipe of described hot water air cooler 21 is communicated with the high-pressure exhaust pipe of defrosting air cooler 22, the low-pressure inlet pipe of described defrosting air cooler 22 and low pressure exhaust pipe are communicated with described expansion valve 4 and evaporimeter 6 respectively.
When heat pump water-heating machine defroster provided by the invention needs to defrost, the low-pressure inlet pipe of defrosting air cooler is communicated with expansion valve and evaporimeter respectively, not only avoid conventional defrost mode to the impact of system, ensure that the stable operation of system, and ensure that Trans-critical cycle CO
2heat pump water-heating machine system can hot water preparing while defrost; There is the advantages such as structure is simple, easy to operate.
Heat pump water-heating machine defroster provided by the invention also comprises the triple valve 5 that entrance point 53 is communicated with described expansion valve 4, first port of export 54 of described triple valve 5 is communicated with described evaporimeter 6, and second port of export 55 of described triple valve 5 is communicated with the low-pressure inlet pipe of described defrosting air cooler 22.
Preferably, the high-pressure pipe of described defrosting air cooler 22 is provided with magnetic valve 8, described magnetic valve 8 is corresponding with described compressor 1 to be arranged.Namely the high-pressure pipe of defrosting air cooler 22 is provided with magnetic valve 8 on one end of compressor 1.Also comprise the fluid reservoir 7 between blast pipe and the air inlet pipe of described regenerator 3 being arranged at described hot water air cooler 21.Described water source is water tank 9, and the water inlet pipe of described hot water air cooler 21 is provided with water pump 10.
Trans-critical cycle CO
2the main circulation loop of heat pump water-heating machine is made up of compressor 1, hot water air cooler 21, defrosting air cooler 22, regenerator 3, expansion valve 4, triple valve 5, evaporimeter 6 and fluid reservoir 7 and magnetic valve 8.Hot water heating circulation is made up of hot water air cooler 21, water tank 9, water circulating pump 10, is provided with running water inlet valve 11 simultaneously, water tank 9 is provided with hot water outlet pipe 12 on hot water circulating pipeline.
Trans-critical cycle CO
2heat pump water-heating machine main circulation loop forms outdoor machine part.CO
2after compressor 1, be compressed into the supercritical fluid of HTHP, this fluid enters hot water air cooler 21 through working medium tube connector, and the water of coming that circulates with water tank in air cooler carries out heat exchange, thus is heated by water.Fluid reservoir 7 is entered after working medium mixing after superheated water air cooler 21, then regenerator 3 is entered, with carry out heat exchange from evaporimeter 6 cryogenic fluid out after again through electric expansion valve 4, become the liquid of low-pressure low-temperature, then enter from triple valve entrance point 53, from first port of export 54 out, enter evaporation in evaporimeter 6 subsequently, heat in evaporation process in absorption chamber outer air, and being further heated after regenerator 3 again, finally gets back to compressor 1 and completes and once circulate.It should be noted that, in the process of normal hot water preparing, the entrance point 53 of triple valve 5 and first port of export 54 are conductings, as shown in Figure 2.
As shown in Figure 3, when needs defrost, control system sends instruction, and triple valve 5 commutates, and entrance point 53 is communicated with second port of export 55, and magnetic valve 8 is opened simultaneously.Now be divided into two-way from the supercritical fluid of the HTHP of compressor 1 discharge, normal hot water producing process, through superheated water air cooler 21, is carried out in one tunnel, and an other road enters defrosting air cooler 22 simultaneously, with be inflated valve 4 dam after low-temp low-pressure fluid carry out heat exchange, promote CO
2temperature, also namely promote and enter the CO of evaporimeter 6
2the temperature of refrigerant.Through the working medium CO of superheated water air cooler 21 with defrosting air cooler 22
2fluid reservoir 7 is entered after mixing, then regenerator 3 is entered, with carry out heat exchange from evaporimeter 6 cryogenic fluid out after again through expansion valve 4, become the liquid of low-pressure low-temperature, then enter from triple valve entrance point 53, from second port of export 55 out, enter defrosting air cooler 22 to be heated, enter evaporation defrosting in evaporimeter 6 subsequently, and be further heated after regenerator 3 again, finally get back to compressor 1 and complete and once circulate.
The present invention also provides a kind of Defrost method applying heat pump water-heating machine defroster as above, and wherein, concrete steps are:
S1, set temperature value to, collect and process machine 1 inlet temperature teo and inlet pressure peo, calculates compressor 1 import degree of superheat dt, as degree of superheat dt>to, start defrosting and go to step S2, as dt<to, terminate defrosting and go to step S3;
If S2 reaches defrosting condition, then improve the frequency of described compressor 1, low-pressure inlet pipe, the low pressure exhaust pipe of described defrosting air cooler 22 are communicated with described expansion valve 4 and evaporimeter 6 respectively, the low-pressure inlet pipe of described defrosting air cooler 22 and high-pressure pipe after heat exchange, defrost in high-temperature gas to described evaporimeter 6 in described defrosting air cooler 22;
S3, described expansion valve 4 and evaporimeter 6 are communicated with, the air inlet pipe of described hot water air cooler 21 and water inlet pipe heat exchange in described hot water air cooler 21 of described hot water air cooler 21.
Acquisition system pressure at expulsion P in Defrost method provided by the invention
opt, air cooler outlet temperature t
gcwith evaporating temperature t
e, according to the functional relation between three, aperture control is carried out to expansion valve.
Concrete control method is: according to described air cooler outlet temperature t
gcwith described evaporator evaporation temperature t
ecalculate the optimum pressure at expulsion P of compressor
opt; Described optimum pressure at expulsion P
optcomputing formula be:
P
opt＝(2.7686-0.0147×t
e)×t
gc+(0.346×t
e-8.851)
According to Compressor Discharge Pressure P and described optimum pressure at expulsion P
optregulate the aperture of electric expansion valve.Work as P>P
opttime, utilize PID to control, increase described electronic expansion valve opening; Work as P<P
opttime, utilize PID to control, reduce described electronic expansion valve opening.
Be communicated with described expansion valve 4 and evaporimeter 6 respectively by triple valve 5 by the low-pressure inlet pipe of described defrosting air cooler 22 in step s 2, or be communicated with described expansion valve 4 and evaporimeter 6 respectively by the second magnetic valve 52.
Embodiment two
As shown in Figure 4, be provided with the first magnetic valve 51 between expansion valve 4 and described evaporimeter 6 described in the heat pump water-heating machine defroster provided in the present embodiment, low-pressure inlet pipe and described expansion valve 4 junction of described defrosting air cooler 22 are provided with the second magnetic valve 52.During normal hot water preparing, the first magnetic valve 51 is opened, and expansion valve 4 is communicated with evaporimeter 6.During defrosting, the second magnetic valve 52 is opened, and the low-pressure inlet pipe of defrosting air cooler 22 is communicated with expansion valve 4 and evaporimeter 6 respectively.All the other, with embodiment one, repeat no more herein.
The heat pump water-heating machine defroster provided in the present embodiment, during use, during normal hot water preparing, the first magnetic valve 51 is opened, and expansion valve 4 is communicated with evaporimeter 6.During defrosting, the second magnetic valve 52 is opened, and low-pressure inlet pipe and the low pressure exhaust pipe of defrosting air cooler 22 are communicated with expansion valve 4 and evaporimeter 6 respectively.
In sum, evaporimeter in heat pump water-heating machine defroster provided by the invention is communicated with compressor by the escape pipe of regenerator, the water inlet pipe of hot water air cooler is communicated with water source, the air inlet pipe of hot water air cooler is in parallel with the high-pressure pipe of defrosting air cooler, and the low pressure air inlet and exhaust piper of defrosting air cooler is communicated with expansion valve and evaporimeter respectively.When heat pump water-heating machine defroster provided by the invention needs to defrost, low-pressure inlet pipe and the low pressure exhaust pipe of defrosting air cooler are communicated with expansion valve and evaporimeter respectively, not only avoid conventional defrost mode to the impact of system, ensure that the stable operation of system, and ensure that Trans-critical cycle CO
2heat pump water-heating machine system can hot water preparing while defrost; There is the advantages such as structure is simple, easy to operate.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a heat pump water-heating machine defroster, it is characterized in that: comprising: the compressor (1) be communicated with successively, the air inlet pipe of hot water air cooler (21), the air inlet pipe of regenerator (3), expansion valve (4) and evaporimeter (6), described evaporimeter (6) is communicated with described compressor (1) by the escape pipe of described regenerator (3), the water inlet pipe of described hot water air cooler (21) is communicated with water source, the air inlet pipe of described hot water air cooler (21) is in parallel with the high-pressure pipe of defrosting air cooler (22), low the compressing into of described defrosting air cooler (22), blast pipe is communicated with described expansion valve (4) and evaporimeter (6) respectively.
2. heat pump water-heating machine defroster as claimed in claim 1, it is characterized in that: also comprise the triple valve (5) that entrance point (53) is communicated with described expansion valve (4), first port of export (54) of described triple valve (5) is communicated with described evaporimeter (6), and second port of export (55) of described triple valve (5) is communicated with the low pressure inlet pipe of described defrosting air cooler (22).
3. heat pump water-heating machine defroster as claimed in claim 1, it is characterized in that: be provided with the first magnetic valve (51) between described expansion valve (4) and described evaporimeter (6), low-pressure inlet pipe and described expansion valve (4) junction of described defrosting air cooler (22) are provided with the second magnetic valve (52).
4. heat pump water-heating machine defroster as claimed in claim 1, it is characterized in that: the high-pressure pipe of described defrosting air cooler (22) is provided with magnetic valve (8), described magnetic valve (8) is corresponding with described compressor (1) to be arranged.
5. heat pump water-heating machine defroster as claimed in claim 1, is characterized in that: also comprise the fluid reservoir (7) between blast pipe and the air inlet pipe of described regenerator (3) being arranged at described hot water air cooler (21).
6. heat pump water-heating machine defroster as claimed in claim 1, is characterized in that: described water source is water tank (9), the water inlet pipe of described hot water air cooler (21) is provided with water pump (10).
7. a Defrost method for the heat pump water-heating machine defroster of application as described in claim 1-6 any one, it is characterized in that, concrete steps are:
S1, set temperature value to, collect and process machine (1) inlet temperature and inlet pressure, calculate described compressor (1) import degree of superheat dt, as degree of superheat dt>to, start defrosting and go to step S2, as dt<to, terminate defrosting and go to step S3;
Low-pressure inlet pipe and the low pressure exhaust pipe of S2, described defrosting air cooler (22) are communicated with described expansion valve (4) and evaporimeter (6) respectively, the low-pressure inlet pipe of described defrosting air cooler (22) and high-pressure pipe after heat exchange, defrost in high-temperature gas to described evaporimeter (6) in described defrosting air cooler (22);
S3, described expansion valve (4) and evaporimeter (6) are communicated with, the air inlet pipe of described hot water air cooler (21) and the heat exchange in described hot water air cooler (21) of the water inlet pipe of described hot water air cooler (21).
8. Defrost method as claimed in claim 7, it is characterized in that: be communicated with described expansion valve (4) and evaporimeter (6) respectively by triple valve (5) by the low-pressure inlet pipe of described defrosting air cooler (22) in step S2, or be communicated with described expansion valve (4) and evaporimeter (6) respectively by the second magnetic valve (52).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510541353.7A CN105180536B (en) | 2015-08-27 | 2015-08-27 | A kind of heat pump water-heating machine defroster and the method for application device defrosting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510541353.7A CN105180536B (en) | 2015-08-27 | 2015-08-27 | A kind of heat pump water-heating machine defroster and the method for application device defrosting |
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| Publication Number | Publication Date |
|---|---|
| CN105180536A true CN105180536A (en) | 2015-12-23 |
| CN105180536B CN105180536B (en) | 2018-02-06 |
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| US5755104A (en) * | 1995-12-28 | 1998-05-26 | Store Heat And Produce Energy, Inc. | Heating and cooling systems incorporating thermal storage, and defrost cycles for same |
| CN200972293Y (en) * | 2006-11-15 | 2007-11-07 | 上海金城制冷设备有限公司 | Refrigeration system |
| CN201514040U (en) * | 2009-07-27 | 2010-06-23 | 珠海格力电器股份有限公司 | Carbon dioxide heat pump water heater |
| CN202648264U (en) * | 2012-06-06 | 2013-01-02 | 海尔集团公司 | Heat regenerator for refrigerator |
| KR101383244B1 (en) * | 2012-01-27 | 2014-04-08 | 한국기계연구원 | Heat pump system with effective defrosting circuit using hot gas bypass method |
| CN103983052A (en) * | 2013-02-08 | 2014-08-13 | 松下电器产业株式会社 | Refrigeration cycle apparatus and hot water generator provided with the same |
| CN104075486A (en) * | 2013-03-26 | 2014-10-01 | 株式会社信佑综合能量 | Apparatus for dual heat pump |
| CN104848617A (en) * | 2015-06-08 | 2015-08-19 | 上海海立睿能环境技术有限公司 | Defrosting system of carbon dioxide heat pump water heater |
-
2015
- 2015-08-27 CN CN201510541353.7A patent/CN105180536B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5755104A (en) * | 1995-12-28 | 1998-05-26 | Store Heat And Produce Energy, Inc. | Heating and cooling systems incorporating thermal storage, and defrost cycles for same |
| CN200972293Y (en) * | 2006-11-15 | 2007-11-07 | 上海金城制冷设备有限公司 | Refrigeration system |
| CN201514040U (en) * | 2009-07-27 | 2010-06-23 | 珠海格力电器股份有限公司 | Carbon dioxide heat pump water heater |
| KR101383244B1 (en) * | 2012-01-27 | 2014-04-08 | 한국기계연구원 | Heat pump system with effective defrosting circuit using hot gas bypass method |
| CN202648264U (en) * | 2012-06-06 | 2013-01-02 | 海尔集团公司 | Heat regenerator for refrigerator |
| CN103983052A (en) * | 2013-02-08 | 2014-08-13 | 松下电器产业株式会社 | Refrigeration cycle apparatus and hot water generator provided with the same |
| CN104075486A (en) * | 2013-03-26 | 2014-10-01 | 株式会社信佑综合能量 | Apparatus for dual heat pump |
| CN104848617A (en) * | 2015-06-08 | 2015-08-19 | 上海海立睿能环境技术有限公司 | Defrosting system of carbon dioxide heat pump water heater |
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