CN204880843U - Gas exhalation of air source increases enthalpy heat pump system - Google Patents
Gas exhalation of air source increases enthalpy heat pump system Download PDFInfo
- Publication number
- CN204880843U CN204880843U CN201520565827.7U CN201520565827U CN204880843U CN 204880843 U CN204880843 U CN 204880843U CN 201520565827 U CN201520565827 U CN 201520565827U CN 204880843 U CN204880843 U CN 204880843U
- Authority
- CN
- China
- Prior art keywords
- way change
- over valve
- air
- heat exchanger
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model relates to a high -efficient air source heat pump system discloses a gas exhalation of air source increases enthalpy heat pump system, including a four -way reversing valve, jet -propelled enthalpy compressor, regenerator, the air -cooled heat exchanger of first refrigerant, a electronic expansion valve, three -way valve, refrigerant subcooling heat exchanger, the 2nd four -way reversing valve, the air -cooled heat exchanger of second refrigerant, the 3rd four -way reversing valve, fourth four -way reversing valve, economic ware and the 2nd electronic expansion valve of increasing. The utility model provides a current heat pump compression ratio big, heat and realize with dual -purpose being difficult to of refrigerating, and the evaporimeter frosts and efficiency operation low grade technical problem, use the jet -propelled enthalpy compressor that increases in the system, utilize the way of refrigerant subcooling heat exchanger heating through outdoor evaporator's air simultaneously, realize the effect that defrosts winter, and the cooperation through a plurality of cross valves realizes can both utilizing in winter and summer middle tonifying qi of compressor and inside heat transfer constant pitch ability means, effectively improve whole heat pump system's efficiency and operational safety.
Description
Technical field
The utility model relates to a kind of heating and cooling cycle system, in particular, relates to a kind of high-efficiency air source heat pump system.
Background technology
Heat pump comes into one's own day by day as a kind of energy saver, and is considered to the effective means of energy-saving and emission-reduction.Heat pump is owing to can provide refrigeration summer, and winter can provide heat, easy to operate and be widely used.But at hot-summer and cold-winter area, because outdoor temperature in winter is low, the large and frosting problem of compression ratio makes air source heat pump not to be widely used, therefore the exploitation high-efficiency heat pump unit that can use in hot-summer and cold-winter area two season is very necessary.
Current air injection enthalpy-increasing compressor adopts gas jet technique in the middle of two-stage throttling, adopts flash vessel to carry out gas-liquid separation, realizes increasing enthalpy effect.It, by limit compression edge injection combination cooling during mesolow, then normally compresses during high pressure, improves compressor air-discharging amount, solve high pressure ratio, and promote the object of heating capacity under reaching low temperature environment.But original design still faces temperature defrosting problem, and effectively can not utilize the feature of air injection enthalpy-increasing in summer.
In sum, in order to solve the shortcoming being difficult to promote rapidly that air source heat pump exists in actual applications, namely compression ratio is large, heats and realizes with dual-purpose being difficult to of freezing, and evaporimeter frosting and efficiency run the technical problems such as low, need to be further improved and innovation existing heat pump.
Utility model content
The utility model provides the dual-purpose air-source air injection enthalpy-increasing heat pump of a kind of heating of refrigeration efficiently, solve existing heat pump compression ratio large, heat and realize with dual-purpose being difficult to of freezing, and evaporimeter frosting and efficiency run the technical problems such as low, use air injection enthalpy-increasing compressor in systems in which, simultaneously utilize cold-producing medium to cross way that cold heat exchanger is heated by the air of outdoor evaporator, realize winter frost removing effect, and realize winter and summer by the cooperation of multiple cross valve and can utilize the energy saving means such as compressor second vapor injection and internal heat, the efficiency of the whole heat pump of effective raising and safety in operation.
The utility model, by the Appropriate application of equipment, realizes heating, cooling needs that heat pump meets season in summer in winter two respectively, eliminates the obstacle that air source heat pump is difficult to promote rapidly in actual applications.
In order to solve the problems of the technologies described above, the utility model is achieved by following technical scheme:
A kind of air-source air injection enthalpy-increasing heat pump, comprises the first four-way change-over valve, air injection enthalpy-increasing compressor, regenerator, the air-cooled heat exchanger of the first cold-producing medium, the first electric expansion valve, triple valve, cold-producing medium crosses cold heat exchanger, the second four-way change-over valve, the air-cooled heat exchanger of second refrigerant, the 3rd four-way change-over valve, the 4th four-way change-over valve, economizer and the second electric expansion valve;
The air-cooled heat exchanger of wherein said first cold-producing medium is positioned at outdoor, and the air-cooled heat exchanger of described second refrigerant is positioned at indoor;
Wherein said first four-way change-over valve, described second four-way change-over valve, described 3rd four-way change-over valve, described 4th four-way change-over valve are that its left port is communicated with upper port or lower port, right output port is communicated with upper port or lower port;
The outlet of described air injection enthalpy-increasing compressor is connected with the lower port of described first four-way change-over valve, the right output port of described first four-way change-over valve is connected with the one end on the cool stream side of described regenerator, the other end on the cool stream side of described regenerator is connected with one end of the air-cooled heat exchanger of described second refrigerant, the other end of the air-cooled heat exchanger of described second refrigerant is connected with the lower port of described second four-way change-over valve and the lower port of described triple valve respectively, the right output port of described triple valve is connected with the import of described second electric expansion valve, the outlet of described second electric expansion valve is connected with the cooling fluid side-entrance end of described economizer, the cooling fluid side outlet end of described economizer is connected with the medial inlet of described air injection enthalpy-increasing compressor,
The left port of described second four-way change-over valve is connected with the outlet of described first electric expansion valve, the import of described first electric expansion valve is connected with the left port of described 4th four-way change-over valve, the described lower port of the 4th four-way change-over valve is connected with one end of the heating fluid side of described regenerator, and the other end of described regenerator heating fluid side is connected with the right output port of described 4th four-way change-over valve, the upper port of described 4th four-way change-over valve is connected with the lower port of described 3rd four-way change-over valve, the upper port of described 3rd four-way change-over valve is connected with the import that cold heat exchanger crossed by described cold-producing medium, the outlet that cold heat exchanger crossed by described cold-producing medium is connected with the right output port of described 3rd four-way change-over valve, the left port of described 3rd four-way change-over valve is connected with the cooled fluid side port of export of described economizer, the cooled fluid side entrance point of described economizer is connected with the right output port of described second four-way change-over valve, the upper port of described second four-way change-over valve is connected with the upper port of described triple valve and one end of the air-cooled heat exchanger of the first cold-producing medium respectively, the other end of the air-cooled heat exchanger of described first cold-producing medium is connected with the left port of the first four-way change-over valve, and the upper port of described first four-way change-over valve is connected with the low-pressure inlet of described air injection enthalpy-increasing compressor.
Wherein, the passage hydraulic diameter of described regenerator, described economizer, the air-cooled heat exchanger of described first cold-producing medium, the air-cooled heat exchanger of described second refrigerant is 0.1mm ~ 25mm.
The beneficial effects of the utility model are:
(1) heat pump of the present utility model is by the port UNICOM mode of control four four-way change-over valves, realizes quick switching and the normal operation of each heat exchanger under two kinds of working conditions of freezing and supplying thermal condition;
(2) heat pump of the present utility model is by using triple valve and four-way change-over valve, and when realizing heat supply in the winter time and cooling in summer operation, compressor all runs with the operational mode of air injection enthalpy-increasing, reaches the object improving systematic function;
(3) heat pump of the present utility model uses the 3rd four-way change-over valve and cold-producing medium to cross cold heat exchanger, is heated by the air of the air-cooled heat exchanger of the first cold-producing medium used as evaporimeter in the winter time, prevents the air-cooled heat exchanger frosting of the first cold-producing medium; Stop cold-producing medium crossing the use of cold heat exchanger in summer, avoid energy to reflux;
(4) heat pump of the present utility model is at air injection enthalpy-increasing suction port of compressor place access regenerator, use four-way change-over valve, when summer fever pump operation, make system compressors inlet superheat, reduce compression ratio, reduce the irreversibility that refrigerant compression causes, improve the validity of the actual refrigeration of system; And in the winter time operation of heat pump time, then stop using this regenerator, thus avoid the backflow of energy.
Accompanying drawing explanation
Fig. 1 is the structural representation of air-source air injection enthalpy-increasing heat pump provided by the utility model;
Fig. 2 is the cooling condition schematic diagram of air-source air injection enthalpy-increasing heat pump provided by the utility model;
Fig. 3 is the confession thermal condition schematic diagram of air-source air injection enthalpy-increasing heat pump provided by the utility model.
In figure: 1, the first four-way change-over valve; 2, air injection enthalpy-increasing compressor; 3, regenerator; 4, the air-cooled heat exchanger of second refrigerant; 5, first electric expansion valve; 6, triple valve; 7, cold heat exchanger crossed by cold-producing medium; 8, second four-way change-over valve; The air-cooled heat exchanger of 9, first cold-producing medium; 10, three four-way change-over valve; 11, four four-way change-over valve; 12, economizer; 13, second electric expansion valve;
Wherein: arrow represents Working fluid flow direction; This pipeline does not circulate pipeline to have slash represent; The air-cooled heat exchanger of second refrigerant (4) is positioned at indoor; The air-cooled heat exchanger of first cold-producing medium (9) is positioned at outdoor.
Detailed description of the invention
Be described in further detail the utility model below by specific embodiment, following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
As shown in Figure 1, present embodiment discloses the air-source air injection enthalpy-increasing heat pump that a kind of efficient refrigeration heating is dual-purpose, crossed cold heat exchanger 7 formed by the first four-way change-over valve 1, second four-way change-over valve 8, the 3rd four-way change-over valve 10, the 4th four-way change-over valve 11, air injection enthalpy-increasing compressor 2, regenerator 3, the air-cooled heat exchanger of economizer 12, first cold-producing medium 9, second refrigerant air-cooled heat exchanger 4, first electric expansion valve 5, second electric expansion valve 13, triple valve 6, cold-producing medium; In this system, the air-cooled heat exchanger 9 of the first cold-producing medium is positioned at outdoor, and the air-cooled heat exchanger 4 of second refrigerant is positioned at indoor.
Wherein the first four-way change-over valve 1, second four-way change-over valve 8, the 3rd four-way change-over valve 10, the 4th four-way change-over valve 11 are that its left port is communicated with upper port or lower port, right output port is communicated with upper port or lower port.
Wherein, the both sides of regenerator 3 are referred to as heating fluid side and cool stream side by the mutual heat exchange of cold-producing medium in regenerator 3 liang of lateral lines in the application.Economizer 12 is with the cold-producing medium in the refrigerant cools opposite side pipeline in a lateral line, in the application, the both sides of economizer 12 is referred to as cool stream side and cooled fluid side.
The outlet of air injection enthalpy-increasing compressor 2 is connected with the lower port of the first four-way change-over valve 1, the right output port of the first four-way change-over valve 1 is connected with the one end on the cool stream side of regenerator 3, the other end on the cool stream side of regenerator 3 is connected with one end of the air-cooled heat exchanger 4 of second refrigerant, the other end of the air-cooled heat exchanger 4 of second refrigerant is connected with the lower port of the second four-way change-over valve 8 and the lower port of triple valve 6 respectively, the right output port of triple valve 6 is connected with the import of the second electric expansion valve 13, the outlet of the second electric expansion valve 13 is connected with the cooling fluid side-entrance end of economizer 12, the cooling fluid side outlet end of economizer 12 is connected with the medial inlet of air injection enthalpy-increasing compressor 2.
The left port of the second four-way change-over valve 8 is connected with the outlet of the first electric expansion valve 5, the import of the first electric expansion valve 5 is connected with the left port of the 4th four-way change-over valve 11, the lower port of the 4th four-way change-over valve 11 is connected with one end of the heating fluid side of regenerator 3, and the other end that described regenerator 3 heats fluid side is connected with the right output port of the 4th four-way change-over valve 11, the upper port of the 4th four-way change-over valve 11 is connected with the lower port of the 3rd four-way change-over valve 10, the import that cold heat exchanger 7 crossed by upper port and the cold-producing medium of the 3rd four-way change-over valve 10 is connected, the outlet that cold heat exchanger 7 crossed by cold-producing medium is connected with the right output port of the 3rd four-way change-over valve 10, the left port of the 3rd four-way change-over valve 10 is connected with the cooled fluid side port of export of economizer 12, the cooled fluid side entrance point of economizer 12 is connected with the right output port of the second four-way change-over valve 8, the upper port of the second four-way change-over valve 8 is connected with the upper port of triple valve 6 and one end of the air-cooled heat exchanger 9 of the first cold-producing medium respectively, the other end of the air-cooled heat exchanger 9 of the first cold-producing medium is connected with the left port of the first four-way change-over valve 1, and the upper port of the first four-way change-over valve 1 is connected with the low-pressure inlet of air injection enthalpy-increasing compressor 2.
The passage hydraulic diameter of regenerator 3, the air-cooled heat exchanger of economizer 12, first cold-producing medium 9, the air-cooled heat exchanger 4 of second refrigerant is preferably 0.1mm ~ 25mm.
The operation principle of air-source air injection enthalpy-increasing heat pump provided by the utility model is as follows:
Under cooling condition, as shown in Figure 2, the left port of the first four-way change-over valve 1, second four-way change-over valve 8, the 3rd four-way change-over valve 10, the 4th four-way change-over valve 11 is communicated with lower port, right output port is communicated with upper port.Cold-producing medium is crossed cold heat exchanger 7 and is quit work.
The high-temperature high-pressure refrigerant that air injection enthalpy-increasing compressor 2 is discharged enters the air-cooled heat exchanger 9 of second refrigerant through the first four-way change-over valve 1 and carries out exchange heat, is cooled to the liquid refrigerant of HTHP, from the liquid refriger-ant section of the air-cooled heat exchanger of the first cold-producing medium 9 HTHP out after the cooled fluid side that the second four-way change-over valve 8 enters economizer 12 successively through the 3rd four-way change-over valve 10, 4th four-way change-over valve 11 enters the heating fluid side of regenerator 3, enter the first electric expansion valve 5 through the 4th four-way change-over valve 11 again and become low temperature liquid cold-producing medium, then enter the air-cooled heat exchanger 4 of second refrigerant through the second four-way change-over valve 8 and carry out evaporation and heat-exchange, for indoor environment provides cold, the cold-producing medium then becoming gaseous state enters the cool stream side cooling of regenerator 3, then the low-pressure inlet entering air injection enthalpy-increasing compressor 2 through the first four-way change-over valve 1 completes the refrigerant circulation of this part, another part becomes the liquid refrigerant of low-temp low-pressure after triple valve 6 and the second electric expansion valve 13, carry out exchange heat from the cool stream side that the liquid refrigerant of the second electric expansion valve 13 low-temp low-pressure out enters economizer 12 and become the medial inlet that gaseous state enters air injection enthalpy-increasing compressor 2, after completing compression, be again discharged into the air-cooled heat exchanger 9 of the first cold-producing medium through the first four-way change-over valve 1 and complete a refrigerant circulation.
Supplying under thermal condition, as shown in Figure 3, the left port of the first four-way change-over valve 1, second four-way change-over valve 8, the 3rd four-way change-over valve 10, the 4th four-way change-over valve 11 is communicated with upper port, right output port is communicated with lower port, and regenerator 3 quits work.
The high-temperature high-pressure refrigerant that air injection enthalpy-increasing compressor 2 is discharged enters the air-cooled heat exchanger 4 of second refrigerant through the first four-way change-over valve 1 provides heat for indoor, is cooled to the liquid refrigerant of HTHP; Enter the second electric expansion valve 13 from the liquid refriger-ant section of the air-cooled heat exchanger 4 of second refrigerant HTHP out through triple valve 6 and become low temperature liquid cold-producing medium, the cool stream side entering economizer 12 is again carried out exchange heat and is become cryogenic gaseous cold-producing medium, then enters air injection enthalpy-increasing compressor 2 medial inlet; The cooled fluid side entering economizer 12 through the second four-way change-over valve 8 from the liquid cold-producing medium another part of the air-cooled heat exchanger of second refrigerant 4 HTHP is out lowered the temperature further, then enter cold-producing medium through the 3rd four-way change-over valve 10 and cross hot and cold heat exchanger 7, heat the air entering the air-cooled heat exchanger of the first cryogen 9 from outside lower the temperature further realized cold.Cross cold heater 7 sub-cooled liquid refrigerant out from cold-producing medium to enter the first electric expansion valve 5 become low temperature liquid cold-producing medium through the 3rd four-way change-over valve 10, the 4th four-way change-over valve 11 successively, then enter the first cold-producing medium air-cooled heat exchanger 9 exchange heat through the second four-way change-over valve 8, become the gaseous refrigerant that low temperature compresses.The low-pressure inlet entering air injection enthalpy-increasing compressor 2 through the first four-way change-over valve 1 from the air-cooled heat exchanger of the first cold-producing medium 9 cryogenic gaseous cold-producing medium out completes compression and completes whole compression with the gas and vapor permeation of medial inlet, and discharged by compressor 2, again enter the air-cooled heat exchanger 4 of second refrigerant through the first four-way change-over valve 1, complete one and heat circulation.
Although be described preferred embodiment of the present utility model by reference to the accompanying drawings above; but the utility model is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that present inventive concept and claim protect, can also make the concrete conversion of a lot of form, these all belong within protection domain of the present utility model.
Claims (2)
1. an air-source air injection enthalpy-increasing heat pump, it is characterized in that, comprise the first four-way change-over valve (1), air injection enthalpy-increasing compressor (2), regenerator (3), the air-cooled heat exchanger of the first cold-producing medium (9), the first electric expansion valve (5), triple valve (6), cold-producing medium cross cold heat exchanger (7), the second four-way change-over valve (8), the air-cooled heat exchanger of second refrigerant (4), the 3rd four-way change-over valve (10), the 4th four-way change-over valve (11), economizer (12) and the second electric expansion valve (13);
The air-cooled heat exchanger of wherein said first cold-producing medium (9) is positioned at outdoor, and the air-cooled heat exchanger of described second refrigerant (4) is positioned at indoor;
Wherein said first four-way change-over valve (1), described second four-way change-over valve (8), described 3rd four-way change-over valve (10), described 4th four-way change-over valve (11) are that its left port is communicated with upper port or lower port, right output port is communicated with upper port or lower port;
The outlet of described air injection enthalpy-increasing compressor (2) is connected with the lower port of described first four-way change-over valve (1), the right output port of described first four-way change-over valve (1) is connected with the one end on the cool stream side of described regenerator (3), the other end on the cool stream side of described regenerator (3) is connected with one end of the air-cooled heat exchanger of described second refrigerant (4), the other end of the air-cooled heat exchanger of described second refrigerant (4) is connected with the lower port of described second four-way change-over valve (8) and the lower port of described triple valve (6) respectively, the right output port of described triple valve (6) is connected with the import of described second electric expansion valve (13), the outlet of described second electric expansion valve (13) is connected with the cooling fluid side-entrance end of described economizer (12), the cooling fluid side outlet end of described economizer (12) is connected with the medial inlet of described air injection enthalpy-increasing compressor (2),
The left port of described second four-way change-over valve (8) is connected with the outlet of described first electric expansion valve (5), the import of described first electric expansion valve (5) is connected with the left port of described 4th four-way change-over valve (11), the lower port of described 4th four-way change-over valve (11) is connected with one end of the heating fluid side of described regenerator (3), and the other end of described regenerator (3) heating fluid side is connected with the right output port of described 4th four-way change-over valve (11), the upper port of described 4th four-way change-over valve (11) is connected with the lower port of described 3rd four-way change-over valve (10), the upper port of described 3rd four-way change-over valve (10) is connected with the import that cold heat exchanger (7) crossed by described cold-producing medium, the outlet that cold heat exchanger (7) crossed by described cold-producing medium is connected with the right output port of described 3rd four-way change-over valve (10), the described left port of the 3rd four-way change-over valve (10) is connected with the cooled fluid side port of export of described economizer (12), the cooled fluid side entrance point of described economizer (12) is connected with the right output port of described second four-way change-over valve (8), the upper port of described second four-way change-over valve (8) is connected with the upper port of described triple valve (6) and one end of the air-cooled heat exchanger of described first cold-producing medium (9) respectively, the other end of the air-cooled heat exchanger of described first cold-producing medium (9) is connected with the left port of described first four-way change-over valve (1), and the upper port of described first four-way change-over valve (1) is connected with the low-pressure inlet of described air injection enthalpy-increasing compressor (2).
2. a kind of air-source air injection enthalpy-increasing heat pump according to claim 1, it is characterized in that, the passage hydraulic diameter of described regenerator (3), described economizer (12), the air-cooled heat exchanger of described first cold-producing medium (9), the air-cooled heat exchanger of described second refrigerant (4) is 0.1mm ~ 25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520565827.7U CN204880843U (en) | 2015-07-30 | 2015-07-30 | Gas exhalation of air source increases enthalpy heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520565827.7U CN204880843U (en) | 2015-07-30 | 2015-07-30 | Gas exhalation of air source increases enthalpy heat pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204880843U true CN204880843U (en) | 2015-12-16 |
Family
ID=54825207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520565827.7U Expired - Fee Related CN204880843U (en) | 2015-07-30 | 2015-07-30 | Gas exhalation of air source increases enthalpy heat pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204880843U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020924A (en) * | 2015-07-30 | 2015-11-04 | 天津大学 | Air source enhanced vapor injection heat pump system |
| CN106288081A (en) * | 2016-08-23 | 2017-01-04 | 上海理工大学 | Supercool type Gas-supplying enthalpy-increasing heat pump and desiccant wheel combined air-conditioning system |
| CN109751795A (en) * | 2018-12-20 | 2019-05-14 | 珠海格力电器股份有限公司 | Heat pump system and its control method |
| CN110608540A (en) * | 2018-06-14 | 2019-12-24 | 三花控股集团有限公司 | Heat pump system |
| US11747057B2 (en) | 2018-06-14 | 2023-09-05 | Hangzhou Sanhua Research Institute Co., Ltd. | Heat pump system |
-
2015
- 2015-07-30 CN CN201520565827.7U patent/CN204880843U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020924A (en) * | 2015-07-30 | 2015-11-04 | 天津大学 | Air source enhanced vapor injection heat pump system |
| CN106288081A (en) * | 2016-08-23 | 2017-01-04 | 上海理工大学 | Supercool type Gas-supplying enthalpy-increasing heat pump and desiccant wheel combined air-conditioning system |
| CN106288081B (en) * | 2016-08-23 | 2017-09-29 | 上海理工大学 | Type Gas-supplying enthalpy-increasing heat pump and desiccant wheel combined air-conditioning system is subcooled |
| CN110608540A (en) * | 2018-06-14 | 2019-12-24 | 三花控股集团有限公司 | Heat pump system |
| CN110608540B (en) * | 2018-06-14 | 2020-08-11 | 三花控股集团有限公司 | Heat pump system |
| US11747057B2 (en) | 2018-06-14 | 2023-09-05 | Hangzhou Sanhua Research Institute Co., Ltd. | Heat pump system |
| CN109751795A (en) * | 2018-12-20 | 2019-05-14 | 珠海格力电器股份有限公司 | Heat pump system and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105020924A (en) | Air source enhanced vapor injection heat pump system | |
| CN204880843U (en) | Gas exhalation of air source increases enthalpy heat pump system | |
| CN203231582U (en) | Two-stage compression heat pump system with economizer and defrosting by means of hot gas bypassing | |
| CN103148629B (en) | Gas-liquid phase ejector synergy refrigeration system for double temperature direct cooling-type refrigerator | |
| CN101788206A (en) | Outdoor double heat exchanger defrosting low-temperature heating system | |
| CN105157270A (en) | Low-environment-temperature air source heat pump system with undercooling loop | |
| CN106839481B (en) | Cooling unit with auxiliary cold source | |
| CN204063300U (en) | A kind of soil composite type variable refrigerant flow aircondition | |
| CN101799227B (en) | Multifunctional air-conditioning and hot-water system | |
| CN103697613A (en) | High-temperature water source heat pump unit | |
| CN106288562A (en) | The defrosting of a kind of air source heat pump system controls devices and methods therefor | |
| CN105276861A (en) | Compensation type double-source heat pump cold and hot air air-conditioner unit | |
| CN106595112A (en) | Solar heat accumulation type two-stage compressed air source heat pump system and operation method thereof | |
| CN105258389A (en) | Compensation type dual-source heat pump cold and hot water unit | |
| CN103528267A (en) | Low-environmental-temperature air source heat pump refrigerating system with heat pipe loop | |
| CN201779921U (en) | Multifunctional switch system of air conditioner and heat pump water heater | |
| CN105466075B (en) | Freeze in heat pump and hot water heating combined system and domestic hot-water's flow processed | |
| CN203964449U (en) | The switchable heat pump of a kind of single twin-stage | |
| CN109186114A (en) | A kind of heat-pump apparatus | |
| CN205351853U (en) | Multi -functional hot recovery type heat pump set | |
| CN104121721B (en) | Single-and-double-stage switchable heat pump | |
| CN106288563A (en) | Defrosting system for ultra-low-loop temperature air source source pump | |
| CN202521952U (en) | Ultralow temperature air source heat pump with double throttling devices | |
| CN206514566U (en) | Air-to-water heat pump | |
| CN204154012U (en) | A kind of air conditioner and heat pump unit with anti-freezing solution regenerating unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20180730 |