CN203518327U - Steam compression type air-conditioner system with energy efficiency augmentation device - Google Patents
Steam compression type air-conditioner system with energy efficiency augmentation device Download PDFInfo
- Publication number
- CN203518327U CN203518327U CN201320527822.6U CN201320527822U CN203518327U CN 203518327 U CN203518327 U CN 203518327U CN 201320527822 U CN201320527822 U CN 201320527822U CN 203518327 U CN203518327 U CN 203518327U
- Authority
- CN
- China
- Prior art keywords
- working medium
- type air
- compression type
- bellows
- steam compression
- 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 - Lifetime
Links
Images
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model relates to the technical field of refrigeration and heating, in particular to a steam compression type air-conditioner system with an energy efficiency augmentation device. The energy efficiency augmentation device is connected into a working medium circulation loop of the system and comprises a container with the variable volume and an executing mechanism for changing the volume of the container. The steam compression type air-conditioner system solves the problem that in the prior art, due to the fact that the average density of a working medium is fixed, the system difficultly works in the best EER or COP state, a new performance adjusting means is provided for the air-conditioner system, the EER of the air-conditioner system can be remarkably improved, and the running performance of the air-conditioner system is remarkably improved.
Description
Technical field
The utility model belongs to cooling and warming technical field, particularly a kind of steam compression heat pump air-conditioning system that efficiency enhancer is housed.
Background technology
Steam compression type air-conditioning system comprises air conditioner refrigerating-heat pump, simple air-conditioning refrigeration system, simple heat pump and heat pump water heater system, the essence of its course of work be its working medium from cryogenic media (as indoor or outdoors air) draw heat, through compressor compression, improve the backward high-temperature medium of temperature (as outdoor or room air) and emit heat.For obtaining most economical efficient operational effect, the condensation temperature of its working medium should exceed a minimum reasonable temperature difference Tk than the temperature of high-temperature medium, and the evaporating temperature of working medium should be than the low minimum operational temperature difference Te of the temperature of cryogenic media.
Under design conditions, above-mentioned requirement can be observed substantially, and now system reaches best Energy Efficiency Ratio and ability to work.But in actual moving process, often can not arrive above-mentioned desirable requirement.
Existing air conditioner refrigerating-heat pump is the change of reply operating mode, mainly contains following two kinds of property regulation means:
1) variable frequency adjustment: variable frequency adjustment is mainly to reach the change flow of working medium and the object of compressor power consumption by changing the rotating speed of compressor.In the situation that temperature is not too high, can reach energy-conservation object by suitable reduction compressor rotary speed like this.
2) expansion valve regulates: comprise heating power expansion valve and electric expansion valve etc.Its Principles of Regulation are to reach by changing the orifice size of expansion valve the object that changes working medium flow and expansion ratio.
The averag density of the working medium of above-mentioned two kinds of regulative modes in all cannot change system, the in other words filling weight of working medium.Theoretical and experiment all confirms, all has the best filling weight of a working medium under each operating mode, and under this best filling weight, system reaches optimum Working, has best Energy Efficiency Ratio.When system has departed from design conditions, above-mentioned two kinds of regulative modes all cannot change the averag density of working medium, so system is just difficult to work under best Energy Efficiency Ratio (EER or COP) state.
When unit switches between air conditioner refrigerating and heat pump working condition, above-mentioned problem is just outstanding especially.As in summer during cooling condition, its ambient temperature interval is that 27 ℃ (indoor) are to 35 ℃ (outdoor); In winter, during heat pump working condition, its external temperature interval is that 20 ℃ (indoor) are to 2 ℃ (outdoor).Under said temperature condition, summer, while freezing, reasonably working medium condensation temperature was made as 50 ℃, and evaporating temperature is 12 ℃; Winter, while heating, the condensation temperature of working medium should be reduced to 35 ℃, and evaporating temperature should be reduced to-8 ℃.Obviously, under these two operating modes, the operating temperature of working medium has differed 15 ℃.Due at different temperature, gaseous working medium has different density, and the density difference of the difference gaseous working medium of 15 ℃ will reach more than 50%.That is to say, under refrigeration and heat pump working condition, the best working medium filling weight in system will have sizable difference.Obviously, traditional heat pump type air conditioning system is difficult to adapt to this situation, if the filling weight of its working medium has been looked after cooling condition, heat pump working condition working medium filling weight will be greatly excessive.For reducing this gap, traditional heat pump type air conditioning system has a mind to dwindle the area of indoor heat exchanger when design, increases indoor heat transfer temperature difference.Way of Refrigerant Design evaporating temperature when like this, freeze summer will be reduced to 5 ℃ from 12 ℃; And condensation temperature while heating winter will be increased to 43 ℃ from 35 ℃.Now under winter, summer two operating modes, the difference of the operating temperature of working medium will be reduced to 10 ℃ of left and right, and the difference of best working medium filling weight is dwindled, but cost is design Energy Efficiency Ratio, also reduce, and design Energy Efficiency Ratio will drop to 3 left and right from 4.
Even while moving under simple cooling condition or heat pump working condition, the most of the time of traditional air-conditioning system is also off-design operating mode, when air-conditioning just starts, indoor temperature is slow decreasing, and after indoor temperature is stable, outdoor temperature may become again in time, and the working medium filling weight of traditional air-conditioning cannot carry out fine adjustment to this, this means that the working medium filling weight of traditional air-conditioning system most of time is not in optimum state.
Utility model content
The averag density due to working medium existing for prior art immobilizes, make system be difficult to the problem of working under best Energy Efficiency Ratio (EER or COP) state, the utility model proposes the continuously adjustable technical scheme of steam compression type air-conditioning system working medium side volume, make working medium averag density in system become adjustable state from the state of immobilizing.The change of working medium side volume means that change has occurred the averag density of working medium, and when the averag density of cycle fluid increases, if other conditions are constant, the condensation temperature of working medium circulation and evaporating temperature all raise, and vice versa.This just provides a kind of new regulating measure for the operation of air-conditioning system, thereby effectively improves the Energy Efficiency Ratio of air-conditioning system.
Technical problem to be solved in the utility model is achieved by the following technical solution:
A kind of steam compression type air-conditioning system that efficiency enhancer is housed, comprise compressor, condenser, expansion valve, evaporimeter and be connected successively the working medium circulation loop that the pipeline of above-mentioned each mechanism forms, in described working medium circulation loop, access efficiency enhancer, described efficiency enhancer comprises variable volume container and changes the executing agency of vessel volume.
Further, system also comprises cross valve, while accessing cross valve in the working medium circulation loop described, switches cross valve and can make this closed circuit by air conditioner refrigerating or heat pump mode operation.
Described condenser also connects into water heat cycles loop by pipeline and water tank and circulating pump.
Better, the link position in described variable volume container and working medium circulation loop is arranged on the circulating line place of compressor outlet.
Particularly, described variable volume container is flexible bellows, the two ends of described bellows are sealed by base plate respectively, and the rear end base plate of described bellows is connected with working medium circulation return by tube connector, and the front end base plate of described bellows is connected with described executing agency.Described executing agency consists of nut screw kinematic pair, and the cylindrical of nut is worm gear, and the worm screw matching with worm gear passes through Motor Drive, and one end of described leading screw is fixedly connected with the front end base plate of described bellows.
The heat pump type air conditioning system that efficiency enhancer is housed of the present utility model can significantly improve the Energy Efficiency Ratio of system, makes operating mode Energy Efficiency Ratio can reach 4 left and right, and its seasonal energy efficiency ratio (seer) can also surpass design conditions Energy Efficiency Ratio, significantly improves the runnability of air-conditioning system.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of embodiment 1-simple air-conditioning refrigeration system;
Fig. 2 is the schematic diagram of embodiment 2-simple heat pump;
Fig. 3 is the schematic diagram of embodiment 3-heat pump water heater system;
Fig. 4 is the schematic diagram of embodiment 4-air conditioner refrigerating-heat pump;
Fig. 5 is efficiency enhancer embodiment schematic diagram;
Fig. 6 is the circulation warm entropy diagram that the system of efficiency enhancer is housed.
The specific embodiment
Fig. 1 is the schematic diagram of embodiment 1-simple air-conditioning refrigeration system, comprises compressor 1, condenser (off-premises station) 3, expansion valve 4, evaporimeter (indoor set) 5 and is connected successively the working medium circulation loop of the pipeline composition of above-mentioned each mechanism.In described working medium circulation loop, access efficiency enhancer 6, described efficiency enhancer is comprised of the executing agency 62 of variable volume container 61 and change vessel volume.As a most preferred embodiment, described variable volume container 61 is arranged on the link position in working medium circulation loop the circulating line place that compressor 1 exports, because the cycle fluid pressure at this place is high, density is large, the smaller volume change of variable volume container 61 can produce larger impact to the averag density of working medium in systemic circulation loop, regulates remolding sensitivity higher.Certainly variable volume container also can be connected on other positions in systemic circulation loop, also can on closed circuit, connect a plurality of variable volume containers.
When summer, outside air temperature declined, the condensation temperature of working medium is also along with decline, and corresponding, the condensing pressure of working medium and density are also along with decline, and the working medium amount in closed circuit is in excessive state, and this will cause the decline of Energy Efficiency Ratio.Now can expand a little the volume of variable volume container 61, reduce the working medium averag density in closed circuit, make the working medium amount in closed circuit reach optimum value, now system has best Energy Efficiency Ratio and refrigerating capacity.Further, under the constant condition of compressor rotary speed, because the working medium averag density in closed circuit is adjustable, the working medium mass flow of passing through compressor is also adjustable, thereby realized utilizing, determine the object that rotating speed routine compressor reaches capacity-variable air conditioner.Therefore, the present invention has the potentiality that replace convertible frequency air-conditioner.
Fig. 2 is the schematic diagram of embodiment 2-simple heat pump, comprises compressor 1, condenser (indoor set) 3, expansion valve 4, evaporimeter (off-premises station) 5 and is connected successively the working medium circulation loop of the pipeline composition of above-mentioned each mechanism.In described working medium circulation loop, access efficiency enhancer 6, described efficiency enhancer is comprised of the executing agency 62 of variable volume container 61 and change vessel volume.As a most preferred embodiment, described variable volume container 61 is arranged on the link position in working medium circulation loop the circulating line place that compressor 1 exports, because the cycle fluid pressure at this place is high, density is large, the smaller volume change of variable volume container 61 can produce larger impact to the averag density of working medium in systemic circulation loop, regulates remolding sensitivity higher.Certainly variable volume container also can be connected on other positions in systemic circulation loop, also can on closed circuit, connect a plurality of variable volume containers.
When winter, outside air temperature declined, can expand a little the volume of variable volume container 61, reduce the averag density of working medium in closed circuit, now the evaporating temperature of working medium also will be along with decline, make evaporimeter keep rational best heat transfer temperature difference, now system realizes efficiently heating under low temperature under the condition that does not substantially reduce Energy Efficiency Ratio and heating capacity.
Fig. 3 is embodiment 3-the be equipped with heat pump water heater system schematic diagram of efficiency enhancer, comprise compressor 1, condenser 3, expansion valve 4, evaporimeter 5 and be connected successively the working medium circulation loop that the pipeline of above-mentioned each mechanism forms, wherein, condenser 3 is gone back and water tank 7 and circulating pump 8 composition water heating circuits.In described working medium circulation loop, access efficiency enhancer 6, described efficiency enhancer is comprised of the executing agency 62 of variable volume container 61 and change vessel volume.As a most preferred embodiment, described variable volume container 61 is arranged on the link position in working medium circulation loop the circulating line place that compressor 1 exports, because the cycle fluid pressure at this place is high, density is large, the smaller volume change of variable volume container 61 can produce larger impact to the averag density of working medium in systemic circulation loop, regulates remolding sensitivity higher.Certainly variable volume container also can be connected on other positions in systemic circulation loop, also can on closed circuit, connect a plurality of variable volume containers.
Due to the work characteristics of Teat pump boiler, water temperature rises gradually, and the water temperature when just started to heat is 10 ℃, and the water temperature that heating ends is raised to 55 ℃, so the condensation temperature of Teat pump boiler working medium is also wanted corresponding and is increased to 65 ℃ from 25 ℃.If use environment-friendly type working medium 134a, in the time of 25 ℃, the density of gaseous working medium is 32kg/m
3, in the time of 65 ℃, the density of gaseous working medium is 100kg/m
3, differ and reach 3 times more than.The working medium filling weight of traditional Teat pump boiler is difficult to adapt to this situation, while starting to heat in the serious excessive situation of working medium, again may be in the very few state of working medium amount during to heating end.This all can obviously reduce the Energy Efficiency Ratio of Teat pump boiler.Use the present invention, we just can this difficult problem of adequate solution.In whole heating process, we can make the volume of variable volume container 61 reduce gradually, namely make the averag density of working medium in closed circuit increase gradually, make condenser all the time in optimum Working, thereby Teat pump boiler has best Energy Efficiency Ratio and maximum ability to work.
Fig. 4 is the schematic diagram of embodiment 4-air conditioner refrigerating-heat pump, comprise compressor 1, cross valve 2, condenser 3, expansion valve 4, evaporimeter 5 and be connected successively the working medium circulation loop that the pipeline of above-mentioned each mechanism forms, switch cross valve 2 and can make this closed circuit by air conditioner refrigerating or heat pump mode operation.In described working medium circulation loop, access efficiency enhancer 6, described efficiency enhancer is comprised of the executing agency 62 of variable volume container 61 and change vessel volume.As a most preferred embodiment, described variable volume container 61 is arranged on the link position in working medium circulation loop the circulating line place that compressor 1 exports, because the cycle fluid pressure at this place is high, density is large, the smaller volume change of variable volume container 61 can produce larger impact to the averag density of working medium in systemic circulation loop, regulates remolding sensitivity higher.Certainly variable volume container also can be connected on other positions in systemic circulation loop, also can on closed circuit, connect a plurality of variable volume containers.
When native system operating mode by air conditioner refrigerating operating mode (if working medium condensation temperature is 50 ℃, evaporating temperature is 12 ℃) switch to heat pump working condition (if working medium condensation temperature is 35 ℃, evaporating temperature is-10 ℃) time, now the volume of variable volume container 61 can be increased, to reduce the working medium averag density in closed circuit, thereby make the condensation temperature of working medium be down to gradually 35 ℃ by 50 ℃, the evaporating temperature of corresponding working medium drops to-10 ℃ of left and right by 12 ℃, realize the switching of operating mode, make systematic energy efficiency ratio remain on 4 left and right, best Energy Efficiency Ratio than existing air-conditioning system improves more than 10%.Otherwise, when transferring cooling condition to by heating condition, the volume reducing of variable volume container 61 can be made to the variation of the filling weight adaptation working medium operating temperature of working medium.
If the utility model and expansion valve regulate or variable frequency adjustment combines the comprehensive fine adjustment that just can realize air-conditioning-heat pump, thereby can under various operating modes, make Δ Tk and Δ Te be adjusted to optimum value, now the Energy Efficiency Ratio of system is by the maximum reaching under this operating mode simultaneously.
Fig. 5 is the embodiment schematic diagram of efficiency enhancer that the steam compression type air-conditioning system of efficiency enhancer is housed.As shown in the figure, described variable volume container 61 is flexible bellows 611, the two ends of described bellows are sealed by base plate respectively, the rear end base plate 612 of described bellows is connected with working medium circulation pipeline by tube connector, and the front end base plate 613 of described bellows is connected with described executing agency 62.
Described executing agency 62 consists of nut screw kinematic pair, and the cylindrical of nut 621 is worm gear 623, and the worm screw 624 matching with worm gear drives by motor 625, and one end of described leading screw 622 is fixedly connected with the front end base plate of described bellows.When motor 625 forward or reverse, worm gear and nut 621 is also followed forward or reverse, thereby leading screw 622 is produced, protracts or rear shrink movement, drives front end base plate 613 motions of bellows container, reaches the object that changes vessel volume.
In order to reduce the dead volume of bellows container, at one section of cylinder 614 of front end base plate 613 inner sides welding of described bellows, this cylindrical diameter is slightly less than the internal diameter of bellows, the length that cylindrical length is slightly larger than bellows while compressing completely.
The vortex totally-enclosed compressor that is 2kW for compressor, the internal diameter of bellows is 20cm, and the diameter of cylinder 614 is 19.8cm, and when the length when bellows compresses is completely 10cm, cylindrical length is 10.1cm.The distance of the end face of cylinder 614 and front end base plate 613 inner side ends changes between 0 to 15cm, and the length of corresponding bellows changes between 10cm to 25cm.
Efficiency enhancer of the present utility model is except the bellows and mechanical driving mechanism thereof of above-described embodiment, can also there be other versions, as piston type cylinder body coordinates with hydraulic drive mechanism, the movement by hydraulic mechanism driven plunger in cylinder body changes the working medium volume in cylinder body.Variable volume container can also adopt the structures such as bellows-type, special deformable composite formula.
Fig. 6 is the circulation warm entropy diagram that the air-conditioning system of efficiency enhancer is housed, and wherein abscissa S represents entropy, ordinate T representation temperature value.The essence of the regulative mode of the volume of change working medium is the averag density that changes the working medium that participates in circulation, thereby make the condensation temperature of working medium and evaporating temperature raise simultaneously or reduce, the closed curve 1-2-3-4 representing with solid line in figure is the cyclic curve under design conditions, wherein 1-2 is working medium compression process, 2-3 is working medium condensation process, 3-4 is working medium expansion process, and 4-1 is working medium evaporation process.When reducing the volume of variable volume container, the averag density that participates in the working medium of circulation increases, illustrated kind of refrigeration cycle curve 1-2-3-4 moves on the whole, as curve 1 '-2 '-3 '-4 ' as shown in, when increasing the volume of variable volume container, the averag density that participates in the working medium of circulation reduces, illustrated kind of refrigeration cycle curve 1-2-3-4 integral body moves down, as shown in curve 1 " 2 "-3 " 4 ", now because the rotating speed of compressor and the aperture of expansion valve there all are not change, thereby the compression ratio of circulation does not have marked change.This is regulative mode of the present utility model and in the past by changing the fundamental difference of the regulative mode of expansion ratio or compression ratio.These two kinds of different regulative modes are combined and can make air-conditioning system accurately meet the operation under various working conditions and make the Energy Efficiency Ratio of system all the time in optimum value.
Claims (7)
1. the steam compression type air-conditioning system that efficiency enhancer is housed, comprise compressor (1), condenser (3), expansion valve (4), evaporimeter (5) and be connected successively the working medium circulation loop that the pipeline of above-mentioned each mechanism forms, it is characterized in that, in described working medium circulation loop, access efficiency enhancer (6), described efficiency enhancer comprises variable volume container and changes the executing agency of vessel volume.
2. the steam compression type air-conditioning system that efficiency enhancer is housed according to claim 1, it is characterized in that, also comprise cross valve (2), while accessing cross valve (2) in the working medium circulation loop described, switch cross valve and can make this closed circuit by air conditioner refrigerating or heat pump mode operation.
3. the steam compression type air-conditioning system that efficiency enhancer is housed according to claim 1, is characterized in that, described condenser also connects into water heat cycles loop by pipeline and water tank (7) and circulating pump (8).
4. according to the steam compression type air-conditioning system that efficiency enhancer is housed described in claims 1 to 3 any one, it is characterized in that, described variable volume container (61) is arranged on the link position in working medium circulation loop the circulating line place that compressor (1) exports.
5. according to the steam compression type air-conditioning system that efficiency enhancer is housed described in claims 1 to 3 any one, it is characterized in that, described variable volume container (61) is flexible bellows (611), the two ends of described bellows are sealed by base plate respectively, the rear end base plate (612) of described bellows is connected with working medium circulation return by tube connector, and the front end base plate (613) of described bellows is connected with described executing agency (62).
6. the steam compression type air-conditioning system that efficiency enhancer is housed according to claim 5, it is characterized in that, described executing agency (62) consists of nut screw kinematic pair, the cylindrical of nut (621) is worm gear (623), the worm screw (624) matching with worm gear drives by motor (625), and one end of described leading screw (622) is fixedly connected with the front end base plate (613) of described bellows.
7. the steam compression type air-conditioning system that efficiency enhancer is housed according to claim 5, it is characterized in that, front end base plate (613) inner side welding one section of cylinder (614) at described bellows, this cylindrical diameter is slightly less than the internal diameter of bellows, the length that cylindrical length is slightly larger than bellows while compressing completely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320527822.6U CN203518327U (en) | 2013-07-22 | 2013-08-27 | Steam compression type air-conditioner system with energy efficiency augmentation device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320438846 | 2013-07-22 | ||
| CN201320438846.4 | 2013-07-22 | ||
| CN201320527822.6U CN203518327U (en) | 2013-07-22 | 2013-08-27 | Steam compression type air-conditioner system with energy efficiency augmentation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203518327U true CN203518327U (en) | 2014-04-02 |
Family
ID=50377253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320527822.6U Expired - Lifetime CN203518327U (en) | 2013-07-22 | 2013-08-27 | Steam compression type air-conditioner system with energy efficiency augmentation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203518327U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604245A (en) * | 2013-07-22 | 2014-02-26 | 陈恩鉴 | Steam compression type air-conditioning system mounted with energy efficiency amplifier |
-
2013
- 2013-08-27 CN CN201320527822.6U patent/CN203518327U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604245A (en) * | 2013-07-22 | 2014-02-26 | 陈恩鉴 | Steam compression type air-conditioning system mounted with energy efficiency amplifier |
| WO2015010502A1 (en) * | 2013-07-22 | 2015-01-29 | 余伟俊 | Vapor compression air-conditioning system equipped with energy efficiency booster |
| CN103604245B (en) * | 2013-07-22 | 2016-04-13 | 陈恩鉴 | A kind of steam compression type air-conditioning system that energy efficiency amplifier is housed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103075831B (en) | Novel air-cooled evaporation type composite refrigeration house refrigerating system | |
| CN104154609B (en) | Dual-system heat pump roof unit | |
| CN103604245B (en) | A kind of steam compression type air-conditioning system that energy efficiency amplifier is housed | |
| CN112325502A (en) | Evaporative cold air source heat pump adopting variable-frequency variable-internal-volume-ratio compressor and control method | |
| CN100402947C (en) | Thermostatic dehumidifying method and equipment | |
| CN1995868A (en) | Wind-driven cooling and heat pump making method and device therefor | |
| CN203518327U (en) | Steam compression type air-conditioner system with energy efficiency augmentation device | |
| CN213687347U (en) | Evaporative cold air source heat pump adopting variable-frequency variable-internal-volume-ratio compressor | |
| CN101078575A (en) | Highly effective heat pump air conditioner and hot water device suitable for wide temperature environment | |
| CN113154721A (en) | Novel energy-saving water chilling unit | |
| CN210463643U (en) | CO2 double-stage frequency conversion air source heat pump hot water unit | |
| CN2702223Y (en) | Dual purpose type air-conditioning and water heating apparatus | |
| CN1605814A (en) | Air compressor with energy storage and refrigeration function | |
| CN202304102U (en) | Air-speed-adjustable ultra-low-temperature air source heat pump | |
| CN103512256A (en) | Refrigerating system and air conditioner | |
| CN208282455U (en) | With the condenser for machine room air conditioner for forcing supercooling apparatus | |
| CN200979313Y (en) | Wind power drive refrigeration and heat pump installation | |
| CN203837328U (en) | Air-cooled heat pump unit | |
| CN2428737Y (en) | Small frequency-variable wind-cooling heat-pump water-cooling-heating machine group | |
| CN204612244U (en) | Modular heat pump | |
| CN204154009U (en) | Adopt water as the centrifugal air conditioner group of cold-producing medium | |
| CN206522880U (en) | A kind of dynamic ice cold-storage air-cooled variable-frequency cryogenic system | |
| CN218442840U (en) | System capable of controlling pressure of refrigerating system | |
| CN110332725A (en) | CO2 twin-stage frequency conversion air friction drag | |
| CN101598476A (en) | A kind of coolant circulating system of air-conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211021 Address after: 510000 room 702, No. 128, compound 81, Xianlie Middle Road, Yuexiu District, Guangzhou City, Guangdong Province Patentee after: Guangdong Tianwei Investment Co.,Ltd. Address before: 510610 room 1303, building C1a, Fuli academician's court, Dongguan Zhuang Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: Chen Enjian Patentee before: Yu Weijun |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
|
| CX01 | Expiry of patent term |