CN203286825U - Defrosting device of air source heat pump - Google Patents
Defrosting device of air source heat pump Download PDFInfo
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- CN203286825U CN203286825U CN2013202639932U CN201320263993U CN203286825U CN 203286825 U CN203286825 U CN 203286825U CN 2013202639932 U CN2013202639932 U CN 2013202639932U CN 201320263993 U CN201320263993 U CN 201320263993U CN 203286825 U CN203286825 U CN 203286825U
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Abstract
The utility model discloses a defrosting device of an air source heat pump. The defrosting device comprises a compressor, a four-way valve, a gas-liquid separator, a heat exchanger, a liquid storing device, a filter, a first finned tube exchanger, a second finned tube exchanger, a first electric air door, a second electric air door, fans, a first solenoid valve, a second solenoid valve, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a fifth one-way valve, a sixth one-way valve, an electronic expansion valve and a third solenoid valve. The first electric air door is arranged at an air inlet of the first finned tube exchanger, the second electric air door is arranged at an air inlet of the second finned tube exchanger, the fans are arranged at air outlets of the two finned tube exchangers, and the first solenoid valve, the second solenoid valve, the first one-way valve, the second one-way valve, the third one-way valve, the fourth one-way valve, the fifth one-way valve, the sixth one-way valve, the electronic expansion valve and the third solenoid valve are arranged on pipelines. The defrosting device is small in temperature fluctuation, improves comfort of an air conditioning system, shortens total time of the defrosting process of the system, and improves the heat supplying rate per unit time of a heat pump system.
Description
Technical field
The utility model belongs to the technical field of refrigerated air-conditioning system Design and manufacture, relates to a kind of Defrost method of air source heat pump system and realizes the device of this method.
Background technology
That air source heat pump has is energy-conservation, take into account cold and heat supply, use flexibly, convenient, initial cost is few, institute takes up space, and the advantage such as little is used widely at China's most areas.But the greatest problem that air source heat pump runs into during heating operation in the winter time is the evaporator surface frosting, formation and growth due to frost layer, strengthened the heat transfer resistance between evaporator surface and air, flow resistance while having increased air stream pervaporation device, make the air mass flow through evaporimeter descend, and heat exchange efficiency obviously reduces, cause being descended by heat exchange amount between air and evaporimeter, the source pump working condition worsens, hydraulic performance decline, even cisco unity malfunction.Defrosting in good time when therefore air source heat pump moves under frosting condition.
To air source heat pump Defrost method commonly used, is at present to realize by system reverse circulation (running refrigerating circulation), while being about to heat and air carry out the evaporimeter of the absorption heat of heat exchange, become condenser during defrosting, condenser originally becomes evaporimeter.There is series of malpractice in this traditional inverse defrosting method: during defrosting, because cross valve commutates, the original high-low pressure of refrigeration system partly switches, and this makes refrigeration system compressor " oil of running quickly " phenomenon, reliability and the service life of reducing compressor occur; During defrosting, cold-producing medium will be used for defrosting by draw heat from heating system, causes the rapid fluctuation of heating system temperature, thereby affects the comfortableness of air-conditioning system; Start to finish to defrosting from defrosting simultaneously, cross valve will move twice, the high-low pressure part (evaporimeter and condenser) of system needs switching to re-establish the pressure and temperature balance twice again, and this not only causes a large amount of energy losses but also total time of system defrost process is lengthened.
The utility model content
Technical problem:The purpose of this utility model is many drawbacks of bringing to refrigeration system for solving existing inverse defrosting mode, provide a kind of reliability high, shorten defrosting time, improve defrosting effect, improve the air source heat pump defrosting device of source pump heating efficiency and air-conditioning system comfortableness.
﹠lt, b TranNum="63" ﹠gt, technical scheme: ﹠lt, / b ﹠gt, air source heat pump defrosting device of the present utility model, comprise compressor, cross valve, gas-liquid separator, heat exchanger, reservoir, filter, the first finned tube exchanger, the second finned tube exchanger, be arranged on the first MOD of the first finned tube exchanger air intlet, be arranged on the second MOD of the second finned tube exchanger air intlet, be arranged on the blower fan at two finned tube exchanger air outlet slit places, and be arranged on the first magnetic valve on pipeline, the second magnetic valve, the first check valve, the second check valve, the 3rd check valve, the 4th check valve, the 5th check valve, the 6th check valve, electric expansion valve and the 3rd magnetic valve.
Be provided with cross valve first input end, cross valve the first output, cross valve the second input and cross valve the second output on cross valve, be provided with heat exchanger input and heat exchanger output on heat exchanger, be provided with the first finned tube exchanger input and the first finned tube exchanger output on the first finned tube exchanger, be provided with the second finned tube exchanger input and the second finned tube exchanger output on the second finned tube exchanger.The output termination cross valve first input end of compressor, cross valve the second input is connected with the heat exchanger input by the first magnetic valve, also by the second magnetic valve, with the second finned tube exchanger input, be connected simultaneously, cross valve the first output is divided into two-way, one tunnel is connected with the first finned tube exchanger input, another road is connected with the second finned tube exchanger input by the 3rd magnetic valve, cross valve the second output is connected with the input of gas-liquid separator, and the output of gas-liquid separator is connected with the input of compressor;
the heat exchanger output simultaneously with the entrance of the first check valve be connected the outlet of check valve and be connected, the outlet of the first check valve is divided into three tunnels, one tunnel connects the input of reservoir, the 3rd check valve of leading up to is connected with the second finned tube exchanger output, the 4th check valve of leading up in addition is connected with the first finned tube exchanger output, the output of reservoir is connected with the input of electric expansion valve by filter, the output of electric expansion valve is divided into three tunnels, one tunnel is connected with the input of the second check valve, the 5th check valve of leading up to is connected with the second finned tube exchanger output, the 6th check valve of leading up in addition is connected with the first finned tube exchanger output.
In the utility model device, compressor is that frequency-changeable compressor maybe can be realized the compressor of energy adjustment.
In the utility model device, when the first finned tube exchanger defrosting, the first MOD is closed, and the second MOD is opened; When the second finned tube exchanger defrosting, the first MOD is opened, and the second MOD is closed.
In the utility model device, during the first finned tube exchanger defrosting, the second finned tube exchanger absorbs heat from air as evaporimeter; During the second finned tube exchanger defrosting, the second finned tube exchanger absorbs heat from air as evaporimeter.
during the operation of air source heat pump refrigeration mode in summer: the refrigerant gas of low-temp low-pressure is sucked by compressor from gas-liquid separator, becoming the HTHP superheated vapor after compression discharges, out be divided into afterwards two-way from cross valve the first output after cross valve, enter respectively the first finned tube exchanger and by the 3rd magnetic valve, enter the second finned tube exchanger, this moment the second closed electromagnetic valve, in the first finned tube exchanger and the second finned tube exchanger, cold-producing medium and air heat-exchange, emit heat and be condensed into liquid, then respectively from the first finned tube exchanger, the second finned tube exchanger out after again respectively through the 4th check valve, converge and enter reservoir after the 3rd check valve, then pass through successively filter, become the gas-liquid two-phase of low-temp low-pressure after electric expansion valve, enter heat exchanger again after the second check valve, the cold-producing medium evaporation of absorbing heat in heat exchanger, emit cold, become after cold-producing medium evaporates fully overheated gas from heat exchanger out afterwards through the first magnetic valve, cross valve enters gas-liquid separator, and then be inhaled into compressor, thereby complete kind of refrigeration cycle, this moment the first MOD, the second MOD is all opened, blower fan work.
during air source heat pump winter heating mode operation: in gas-liquid separator, the refrigerant gas of low-temp low-pressure is sucked by compressor, discharge and enter cross valve after compression, out enter heat exchanger through the first magnetic valve afterwards from cross valve the second input, this moment the second closed electromagnetic valve, cold-producing medium is emitted heat in heat exchanger, flow out after being condensed into liquid, enter reservoir through the first check valve, cold-producing medium from reservoir out afterwards through filter, after electric expansion valve is become gas-liquid two-phase by throttling, be divided into two-way, one tunnel enters the second finned tube exchanger through the 5th check valve, an other road enters the first finned tube exchanger through the 6th check valve, cold-producing medium respectively in two heat exchangers with air heat-exchange, become superheated vapor after absorbing heat, cold-producing medium from the first finned tube exchanger out after with out enter cross valve afterwards after the cold-producing medium of the 3rd magnetic valve converges from the second finned tube exchanger, out enter afterwards gas-liquid separator from cross valve the second output, and then be inhaled into compressor, thereby complete circulation, this moment the first MOD, the second MOD is all opened, blower fan work.
When needing to defrost after heat pump heating operation a period of time, heat pump is switched to defrosting mode.System is taked the alternately mode of defrosting for the first finned tube exchanger and the second finned tube exchanger.when heating mode is switched to defrosting mode, at first carry out the second finned tube exchanger defrosting: the cold-producing medium in gas-liquid separator is sucked compression by compressor at this moment, enter cross valve after discharge, when cross valve is compared heating mode at this moment, be failure to actuate, cold-producing medium enters the second finned tube exchanger through the second magnetic valve after cross valve the second input flows out, this moment the first magnetic valve, the 3rd closed electromagnetic valve, the cold-producing medium of HTHP is emitted heat in the second finned tube exchanger, melt the heat exchanger surface frost layer, condensation of refrigerant flows out from the second finned tube exchanger after becoming liquid, enter reservoir after the 3rd check valve, then pass through respectively filter, electric expansion valve enters the first finned tube exchanger through the 6th check valve after being become gas-liquid two-phase by throttling, the cold-producing medium evaporation of absorbing heat in the first finned tube exchanger, flow out the first finned tube exchanger fully after the evaporation, enter cross valve, after flowing out, cross valve the second output again by compressor, sucked through gas-liquid separator, complete the circulation to the second finned tube exchanger defrosting, this moment, the first MOD was opened, the second MOD is closed, blower fan work.
after the second finned tube exchanger is completed defrosting, the switching cross valve, sucked by compressor from gas-liquid separator, the cold-producing medium of compression and discharge is after cross valve, after flowing out, cross valve the first output enters the first finned tube exchanger, this moment the 3rd closed electromagnetic valve, cold-producing medium is emitted heat in the first finned tube exchanger, melt frost layer, condensation of refrigerant flows out and enters reservoir through the 4th check valve from the first finned tube exchanger after becoming liquid, then pass through successively filter, the electric expansion valve throttling enters the second finned tube exchanger through the 5th check valve after becoming gas-liquid two-phase, cold-producing medium therein with air heat-exchange, absorbing heat evaporates fully, after flowing out the second finned tube exchanger, enter cross valve (the first closed electromagnetic valve this moment) through the second magnetic valve, after cold-producing medium flows out from cross valve the second output through gas-liquid separator, again by compressor, sucked, complete the circulation to the first finned tube exchanger defrosting, this moment, the first MOD was closed, the second MOD is opened, blower fan work.After the first finned tube exchanger is completed defrosting, cross valve action commutation, the first MOD, the second MOD are all opened, and blower fan is worked always, and the system roll-back heat pump heats circulation.
Beneficial effect:The utility model compared with prior art, has the following advantages:
During defrosting cold-producing medium not from heating system draw heat be used for defrosting, make the heating system temperature fluctuation very little, improved the comfortableness of air-conditioning system; Start to finish to defrosting from defrosting, although cross valve moves twice, but it is destroyed that the pressure balance in heat exchanger, equalized temperature do not have, a large amount of energy losses of bringing thus (there is this loss in conventional reverse circulation defrosting) have been avoided, make simultaneously the total time shorten of system defrost process, improve the unit interval heat input rate of heat pump.
Description of drawings
Fig. 1 is the utility model novel air source heat pump defroster schematic diagram.
have in figure: compressor 1, cross valve 2, cross valve first input end 2a, cross valve the first output 2b, cross valve the second input 2c, cross valve the second output 2d, the first magnetic valve 3, the second magnetic valve 4, heat exchanger 5, heat exchanger input 5a, heat exchanger output 5b, the first check valve 6, the second check valve 7, the 3rd check valve 8, the 4th check valve 9, the 5th check valve 13, the 6th check valve 14, reservoir 10, filter 11, electric expansion valve 12, the first finned tube exchanger 15, the first finned tube exchanger input 15a, the first finned tube exchanger output 15b, the first MOD 16, the second finned tube exchanger 17, the second finned tube exchanger input 17a, the second finned tube exchanger output 17b, the second MOD 18, blower fan 19, the 3rd magnetic valve 20, gas-liquid separator 21.
The specific embodiment
Further illustrate the utility model below in conjunction with drawings and Examples.
the concrete method of attachment of the utility model is the output termination cross valve first input end 2a of compressor 1, cross valve the second input 2c meets heat exchanger input 5a by the first magnetic valve 3, simultaneously also by the second magnetic valve 4, meet the second finned tube exchanger input 17a, heat exchanger output 5b connects the entrance of the first check valve 6, the outlet of the first check valve 6 is divided into three tunnels, one tunnel connects the input of reservoir 10, the 3rd check valve 8 of leading up to meets the second finned tube exchanger output 17b, the 4th check valve 9 of leading up in addition meets the first finned tube exchanger output 15b, the output of reservoir 10 connects the input of electric expansion valve 12 by filter 11, the output of electric expansion valve 12 is divided into three tunnels, second check valve 7 of leading up to meets heat exchanger output 5b, the 5th check valve 13 of leading up to meets the second finned tube exchanger output 17b, the 6th check valve 14 of leading up in addition meets the first finned tube exchanger output 15b, the first finned tube exchanger input 15a meets cross valve the first output 2b, the second finned tube exchanger input 17a also meets cross valve the first output 2b by the 3rd magnetic valve 20 simultaneously, cross valve the second output 2d connects the input of gas-liquid separator 21, the input of the output termination compressor 1 of gas-liquid separator 21, air intake at the first finned tube exchanger 15 is equipped with the first MOD 16, air intake at the second finned tube exchanger 17 is equipped with the second MOD 18, air outlet slit at the first finned tube exchanger 15 and the second finned tube exchanger 17 is equipped with blower fan 19.
during the operation of air source heat pump refrigeration mode in summer: the refrigerant gas of low-temp low-pressure is sucked by compressor 1 from gas-liquid separator 21, becoming the HTHP superheated vapor after compression discharges, out be divided into afterwards two-way from cross valve the first output 2b after cross valve 2, enter respectively the first finned tube exchanger 15 and by the 3rd magnetic valve 20, enter the second finned tube exchanger 17, this moment, the second magnetic valve 4 cut out, in the first finned tube exchanger 15 and the second finned tube exchanger 17, cold-producing medium and air heat-exchange, emit heat and be condensed into liquid, then respectively from the first finned tube exchanger 15, the second finned tube exchanger 17 out after again respectively through the 4th check valve 9, converge and enter reservoir 10 after the 3rd check valve 8, then pass through successively filter 11, become the gas-liquid two-phase of low-temp low-pressure after electric expansion valve 12, enter heat exchanger 5 again after the second check valve 7, the cold-producing medium evaporation of absorbing heat in heat exchanger 5, emit cold, become after cold-producing medium evaporates fully overheated gas from heat exchanger 5 out afterwards through the first magnetic valve 3, cross valve 2 enters gas-liquid separator 21, and then be inhaled into compressor 1, thereby complete kind of refrigeration cycle, this moment the first MOD 16, the second MOD 18 is all opened, blower fan 19 work.
during air source heat pump winter heating mode operation: in gas-liquid separator 21, the refrigerant gas of low-temp low-pressure is sucked by compressor 1, discharge and enter cross valve 2 after compression, the second input 2c out enters heat exchanger 5 through the first magnetic valve 3 afterwards from cross valve, this moment, the second magnetic valve 4 cut out, cold-producing medium is emitted heat in heat exchanger 5, flow out after being condensed into liquid, enter reservoir 10 through the first check valve 6, cold-producing medium from reservoir 10 out afterwards through filter 11, after electric expansion valve 12 is become gas-liquid two-phase by throttling, be divided into two-way, one tunnel enters the second finned tube exchanger 17 through the 5th check valve 13, an other road enters the first finned tube exchanger 15 through the 6th check valve 14, cold-producing medium respectively in two heat exchangers with air heat-exchange, become superheated vapor after absorbing heat, the superheated vapor that flows out from the first finned tube exchanger 15 with flow out from the second finned tube exchanger 17 and enter cross valve 2 after the superheated vapor of the 3rd magnetic valve 20 converge, the second output 2d out enters gas-liquid separator 21 afterwards from cross valve, and then be inhaled into compressor 1, thereby complete circulation, this moment the first MOD 16, the second MOD 18 is all opened, blower fan 19 work.
When needing to defrost after heat pump heating operation a period of time, heat pump is switched to defrosting mode.System is taked the alternately mode of defrosting for the first finned tube exchanger 15 and the second finned tube exchanger 17.when heating mode is switched to defrosting mode, at first carry out the second finned tube exchanger 17 defrostings: the cold-producing medium in gas-liquid separator 21 is sucked compression by compressor 1 at this moment, enter cross valve 2 after discharge, when cross valve 2 is compared heating mode at this moment, be failure to actuate, the second magnetic valve 4 is opened, cold-producing medium enters the second finned tube exchanger 17 through the second magnetic valve 4 after cross valve the second input 2c flows out, this moment the first magnetic valve 3, the 3rd magnetic valve 20 cuts out, the cold-producing medium of HTHP is emitted heat in the second finned tube exchanger 17, melt finned tube exchanger surface frost layer, condensation of refrigerant flows out from the second finned tube exchanger 17 after becoming liquid, enter reservoir 10 after the 3rd check valve 8, then pass through respectively filter 11, electric expansion valve 12 enters the first finned tube exchanger 15 through the 6th check valve 14 after being become gas-liquid two-phase by throttling, the cold-producing medium evaporation of absorbing heat in the first finned tube exchanger 15, flow out the first finned tube exchanger 15 fully after the evaporation, enter cross valve 2, after flowing out, cross valve the second output 2d again by compressor 1, sucked through gas-liquid separator 21, complete the circulation to the second finned tube exchanger 17 defrostings, this moment, the first MOD 16 was opened, the second MOD 18 is closed, blower fan 19 work.
after the second finned tube exchanger 17 is completed defrosting, switching cross valve 2, cold-producing medium in gas-liquid separator 21 is sucked by compressor 1, compress and discharge, after cross valve 2, after flowing out, cross valve the first output 2b enters the first finned tube exchanger 15, this moment, the 3rd magnetic valve 20 cut out, cold-producing medium is emitted heat in the first finned tube exchanger 15, melt frost layer, condensation of refrigerant flows out and enters reservoir 10 through the 4th check valve 9 from the first finned tube exchanger 15 after becoming liquid, then pass through successively filter 11, electric expansion valve 12 throttlings enter the second finned tube exchanger 17 through the 5th check valve 13 after becoming gas-liquid two-phase, cold-producing medium therein with air heat-exchange, absorbing heat evaporates fully, after flowing out the second finned tube exchanger 17, entering cross valve 2(the first magnetic valve 3 this moment through the second magnetic valve 4 closes), after cold-producing medium flows out from cross valve the second output 2d through gas-liquid separator 21, again by compressor 1, sucked, complete the circulation to the first finned tube exchanger 15 defrostings, this moment, the first MOD 16 was closed, the second MOD 18 is opened.After the first finned tube exchanger 15 is completed defrosting, cross valve 2 action commutations, the first MOD 16, the second MOD 18 are all opened, and blower fan 19 is worked always, and the system roll-back heat pump heats circulation.
Under defrosting mode, when carrying out the first finned tube exchanger and the second finned tube exchanger respectively, corresponding the first MOD, the second MOD are closed, in the time of can reducing the defrosting of corresponding finned tube exchanger and the heat exchange thermal loss of air, can increase simultaneously the air quantity of the finned tube exchanger that does not defrost, improve the defrosting effect of system.Running frequency that can be by regulating compressor in defrost process alternately or compressor is carried out energy adjustment, the optimum operation of system while guaranteeing defrosting.
Claims (4)
1. air source heat pump defrosting device, it is characterized in that this device comprises compressor (1), cross valve (2), gas-liquid separator (21), heat exchanger (5), reservoir (10), filter (11), the first finned tube exchanger (15), the second finned tube exchanger (17), be arranged on first MOD (16) of described the first finned tube exchanger (15) air intlet, be arranged on second MOD (18) of described the second finned tube exchanger (17) air intlet, be arranged on the blower fan (19) at two finned tube exchanger air outlet slit places, and be arranged on the first magnetic valve (3) on pipeline, the second magnetic valve (4), the first check valve (6), the second check valve (7), the 3rd check valve (8), the 4th check valve (9), the 5th check valve (13), the 6th check valve (14), electric expansion valve (12) and the 3rd magnetic valve (20),
be provided with cross valve first input end (2a) on described cross valve (2), cross valve the first output (2b), cross valve the second input (2c) and cross valve the second output (2d), be provided with heat exchanger input (5a) and heat exchanger output (5b) on described heat exchanger (5), be provided with the first finned tube exchanger input (15a) and the first finned tube exchanger output (15b) on described the first finned tube exchanger (15), be provided with the second finned tube exchanger input (17a) and the second finned tube exchanger output (17b) on described the second finned tube exchanger (17), the output termination cross valve first input end (2a) of described compressor (1), cross valve the second input (2c) is connected with heat exchanger input (5a) by the first magnetic valve (3), also by the second magnetic valve (4), with the second finned tube exchanger input (17a), be connected simultaneously, cross valve the first output (2b) is divided into two-way, one tunnel is connected with the first finned tube exchanger input (15a), another road is connected with the second finned tube exchanger input (17a) by the 3rd magnetic valve (20), cross valve the second output (2d) is connected with the input of gas-liquid separator (21), the output of gas-liquid separator (21) is connected with the input of compressor (1),
heat exchanger output (5b) simultaneously with the entrance of the first check valve (6) be connected the outlet of check valve (7) and be connected, the outlet of the first check valve (6) is divided into three tunnels, one tunnel connects the input of reservoir (10), the 3rd check valve (8) of leading up to is connected with the second finned tube exchanger output (17b), the 4th check valve (9) of leading up in addition is connected with the first finned tube exchanger output (15b), the output of reservoir (10) is connected with the input of electric expansion valve (12) by filter (11), the output of electric expansion valve (12) is divided into three tunnels, one tunnel is connected with the input of the second check valve (7), the 5th check valve (13) of leading up to is connected with the second finned tube exchanger output (17b), the 6th check valve (14) of leading up in addition is connected with the first finned tube exchanger output (15b).
2. air source heat pump defrosting device according to claim 1, is characterized in that, described compressor (1) maybe can be realized the compressor of energy adjustment for frequency-changeable compressor.
3. air source heat pump defrosting device according to claim 1, is characterized in that, when described the first finned tube exchanger (15) defrosted, the first MOD (16) was closed, and the second MOD (18) is opened; When described the second finned tube exchanger (17) defrosted, the first MOD (16) was opened, and the second MOD (18) is closed.
4. air source heat pump defrosting device according to claim 1, is characterized in that, during described the first finned tube exchanger (15) defrosting, the second finned tube exchanger (17) absorbs heat from air as evaporimeter; During described the second finned tube exchanger (17) defrosting, the second finned tube exchanger (15) absorbs heat from air as evaporimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202639932U CN203286825U (en) | 2013-05-15 | 2013-05-15 | Defrosting device of air source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202639932U CN203286825U (en) | 2013-05-15 | 2013-05-15 | Defrosting device of air source heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203286825U true CN203286825U (en) | 2013-11-13 |
Family
ID=49543185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202639932U Withdrawn - After Issue CN203286825U (en) | 2013-05-15 | 2013-05-15 | Defrosting device of air source heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203286825U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196262A (en) * | 2013-04-19 | 2013-07-10 | 洛阳中懋环保设备有限公司 | Hot gas bypass defrosting device for air source heat pump water heater |
| CN103245150A (en) * | 2013-05-15 | 2013-08-14 | 东南大学 | Air source heat pump defrosting device |
| CN103968594A (en) * | 2014-05-28 | 2014-08-06 | 广东志高暖通设备股份有限公司 | Air cooling heat pump unit |
| CN107655237A (en) * | 2017-11-03 | 2018-02-02 | 上海柯茂机械有限公司 | Air source heat pump system |
-
2013
- 2013-05-15 CN CN2013202639932U patent/CN203286825U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196262A (en) * | 2013-04-19 | 2013-07-10 | 洛阳中懋环保设备有限公司 | Hot gas bypass defrosting device for air source heat pump water heater |
| CN103245150A (en) * | 2013-05-15 | 2013-08-14 | 东南大学 | Air source heat pump defrosting device |
| CN103968594A (en) * | 2014-05-28 | 2014-08-06 | 广东志高暖通设备股份有限公司 | Air cooling heat pump unit |
| CN107655237A (en) * | 2017-11-03 | 2018-02-02 | 上海柯茂机械有限公司 | Air source heat pump system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131113 Effective date of abandoning: 20150211 |
|
| RGAV | Abandon patent right to avoid regrant |