CN203757891U - Direct-evaporation air cooling type fresh air handling unit - Google Patents
Direct-evaporation air cooling type fresh air handling unit Download PDFInfo
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- CN203757891U CN203757891U CN201420132003.6U CN201420132003U CN203757891U CN 203757891 U CN203757891 U CN 203757891U CN 201420132003 U CN201420132003 U CN 201420132003U CN 203757891 U CN203757891 U CN 203757891U
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- evaporimeter
- air
- blower fan
- heat exchanger
- expansion valve
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- 238000001704 evaporation Methods 0.000 title claims description 15
- 238000001816 cooling Methods 0.000 title description 19
- 239000003507 refrigerant Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000009833 condensation Methods 0.000 abstract description 7
- 230000005494 condensation Effects 0.000 abstract description 7
- 238000004378 air conditioning Methods 0.000 abstract description 5
- 238000005057 refrigeration Methods 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000007791 dehumidification Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 3
- 239000000498 cooling water Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 206010009866 Cold sweat Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Air Conditioning Control Device (AREA)
Abstract
一种直接蒸发式水冷型新风机组，新风处理箱体（1）的一端有进风调节阀（2），进风调节阀里侧有空气过滤器（3），另一端有风机（9）；设置有三个可单独或同时运行的制冷回路，第一制冷回路由经制冷剂管路连接的变频压缩机（10）、第一板式换热器（13）、第一储液罐（15）、第一干燥过滤器（18）、第一热力膨胀阀（21）和第一蒸发器（4）组成；第二制冷回路由经制冷剂管路连接的第一定速压缩机（11）、第二板式换热器（14）、第二储液罐（16）、第二干燥过滤器（19）、第二热力膨胀阀（22）和第二蒸发器（5）组成；第三制冷回路由经制冷剂管路连接的第二定速压缩机（12）、冷凝盘管（7）、第三储液罐（17）、第三干燥过滤器（20）、第三热力膨胀阀（23）和第三蒸发器（6）组成。本实用新型不但可以使机组在宽气象条件下稳定运行，满足空调系统的除湿要求，还可以提高送风舒适性，防止出风口结露。
A direct evaporative water-cooled fresh air unit, with an air inlet regulating valve (2) at one end of the fresh air processing box (1), an air filter (3) inside the air inlet regulating valve, and a fan (9) at the other end; There are three refrigerating circuits that can operate independently or simultaneously, the first refrigerating circuit is composed of a frequency conversion compressor (10), a first plate heat exchanger (13), a first liquid storage tank (15), The first dry filter (18), the first thermal expansion valve (21) and the first evaporator (4); the second refrigeration circuit is composed of the first fixed-speed compressor (11) connected through the refrigerant pipeline, the second The second plate heat exchanger (14), the second liquid storage tank (16), the second dry filter (19), the second thermal expansion valve (22) and the second evaporator (5); the third refrigeration circuit consists of The second fixed-speed compressor (12), the condensing coil (7), the third liquid storage tank (17), the third dry filter (20), and the third thermal expansion valve (23) connected through the refrigerant pipeline and the third evaporator (6). The utility model can not only make the unit operate stably under wide weather conditions, meet the dehumidification requirements of the air conditioning system, but also improve the air supply comfort and prevent dew condensation at the air outlet.
Description
Technical field
The utility model relates to a kind of new blower fan group, is exactly the new blower fan group of a kind of direct evaporating water cooled type based on humiture independence control air conditioner system.
Background technology
Energy Saving of Central Air-conditioning is the important component part of building energy conservation, humiture independence control air conditioner system is development in recent years a kind of air conditioning system faster, its adopt two overlap independently system control respectively with conditioning chamber in humidity and temperature, avoided the reduction of the energy waste that in conventional system, humiture Combined Treatment is brought and air quality.The advantage of humiture independence control air conditioner system in building energy conservation has been that increasing HVAC industry personage understands and accepts, and in Practical Project, obtained increasing application.In humiture autonomous control system, the control of humidity realizes by new wind, by a certain amount of new wind process send into after suitable moisture level indoor, by the new wind being dried, indoor remaining wetting taken away, ensure the control requirement of indoor humidity, the new blower fan group of therefore new wind being carried out to cool-down dehumidification processing is one of visual plant of humiture independence control air conditioner system.The new blower fan group of direct-evaporation-type is processed new wind without concentrated handpiece Water Chilling Units supply cryogenic freezing water, flexible and convenient to use, and can, by air-treatment to lower dew-point temperature, be a kind of fresh-air handling unit that is well suited for using in humiture independence control air conditioner system.According to the difference of condensation radiating mode, the new blower fan group of direct-evaporation-type can be divided into two kinds of Wind-cooling type and water-cooling types, compared with Wind-cooling type unit, the Energy Efficiency Ratio of water-cooling type unit is high, and all unit can be placed on indoor, while having avoided Wind-cooling type unit to be applied in some building, without the problem of the outer unit of correct position holding chamber, keeping being also better than air-cooled unit aspect architectural appearance coordination attractive in appearance.Certainly owing to having adopted the condensing mode of water-cooled, need to be correspondingly equipped with cooling tower, coolant pump and cooling water pipeline in system, initial cost will be higher than air-cooled system.The new blower fan group of the direct-evaporation-type master who uses is at present if it were not for for humiture independence control air conditioner system, in standard GB/T/T 25128-2010 " direct-evaporation-type brand new air processing group ", according to the difference of processed new wind air-out dry-bulb temperature, unit is divided into large enthalpy difference type and little enthalpy difference type two classes.Air-out dry-bulb temperature be not more than 23 DEG C for large enthalpy difference type, taking 27 DEG C as new wind processing target as little enthalpy difference type, and for most practical engineering project, leaving air temp is that the new wind of 23 DEG C can not all be taken away indoor humidity load.The new blower fan group of direct-evaporation-type is mainly used in the VMC of multi-connected air conditioning system at present, its operating temperature interval is less, general outside air temperature is down to 23 DEG C when following, the refrigeration system of the new blower fan group of direct-evaporation-type is out of service, new wind is not freezed, blower fan is directly sent the outdoor new wind without warm and humid processing into room.The design of the new blower fan group of existing direct-evaporation-type is not suitable in humiture autonomous control system yet, because the humidity load in air-conditioned room is generally produced by personnel, annual humidity load changes less, resh air requirement is stable, but the air intake state difference of different new wind of period is very large, season in midsummer, refrigerating capacity and moisture removal were all very large, in clammy season, outdoor temperature is low and humidity load still exists, still need unit to carry out cooling and dehumidifying to new wind, this refrigerating capacity that unit will be provided differs greatly, and may differ several times even tens times.For adopting the new blower fan group of direct-evaporation-type of constant speed compressor, the refrigerating capacity excursion that can provide is very limited, if employing frequency-changeable compressor, although the refrigerating capacity adjustable range of unit can have larger increase, but in the situation that rate of load condensate is very little, unit operation performance condition worsens, and Efficiency Decreasing, also cannot realize the stable operation under wide meteorological condition.
Summary of the invention
The utility model can not meet humiture independence control air conditioner system and change at outdoor weather condition the feature of stylish wind processing requirements for the new blower fan group of existing direct evaporating water cooled type, provide a kind of direct evaporating water cooled type new blower fan group, not only can make unit stable operation under wide meteorological condition, meet the dehumidifying requirement of air-conditioning system, can also improve air-supply comfortableness, prevent air outlet dewfall.
For achieving the above object, the technical solution adopted in the utility model is:
The new blower fan group of a kind of direct evaporating water cooled type, there is air inlet adjustment valve one end that new wind is processed casing, and there is air cleaner air inlet adjustment valve inboard, and the other end has blower fan; Be provided with three refrigerating circuits that can move individually or simultaneously, the first refrigerating circuit is made up of the frequency-changeable compressor connecting through refrigerant line, the first plate type heat exchanger, the first fluid reservoir, the first device for drying and filtering, the first heating power expansion valve and the first evaporimeter; The second refrigerating circuit is made up of the first constant speed compressor connecting through refrigerant line, the second plate type heat exchanger, the second fluid reservoir, the second device for drying and filtering, the second heating power expansion valve and the second evaporimeter; The 3rd refrigerating circuit is made up of the second constant speed compressor connecting through refrigerant line, condenser coil, the 3rd fluid reservoir, the 3rd device for drying and filtering, the 3rd heating power expansion valve and the 3rd evaporimeter; Wherein the first evaporimeter, the second evaporimeter, the 3rd evaporimeter and condenser coil are successively set between air cleaner and blower fan.
In above-mentioned, at the refrigerant inlet of the first evaporimeter, the first liquid-dividing head is installed, at the refrigerant inlet of the second evaporimeter, the second liquid-dividing head is installed, at the refrigerant inlet of the 3rd evaporimeter, the 3rd liquid-dividing head is installed.
In the first refrigerating circuit, the first plate type heat exchanger uses as condenser, and two kinds of fluid media (medium)s of heat exchange are respectively cold-producing medium and cooling water.New wind is after first evaporimeter in the first loop, air themperature is reduced to 22 DEG C of left and right, the compressor in the first loop adopts frequency-changeable compressor, frequency-changeable compressor energy adjustment scope is large, the capacity that can correspondingly change compressor in the time that outdoor weather condition changes realizes the change of refrigerating capacity, ensures the requirement of leaving air temp.
In the second refrigerating circuit, the second plate type heat exchanger also uses as condenser, two kinds of fluid media (medium)s of heat exchange are also respectively cold-producing medium and cooling water, compressor in second servo loop adopts constant speed compressor, because the first evaporimeter has carried out cooling and dehumidifying processing to new wind, the new wind state that enters the second evaporimeter is relatively stable, therefore the compressor configuring in second servo loop is constant speed compressor, the second evaporimeter leaving air temp is 15 DEG C of left and right, the adjusting of refrigerating capacity is, on the CWR of the second plate type heat exchanger, electric control valve is housed, by regulating the size control condensing pressure of cooling water flow and condensation temperature to realize.
The 3rd refrigerating circuit and first, the second refrigerating circuit difference, the condenser of the 3rd refrigerating circuit is air-cooled condenser and is placed in new wind processing casing, be that new wind is by the first evaporimeter, the second evaporimeter, after the 3rd evaporator cools dehumidifying, heat by the condenser of tertiary circuit again, the object of doing is like this lower because meet the new air temperature of water capacity processing requirements after three grades of evaporimeters are processed, if directly send into the indoor air outlet dewfall that easily causes, indoor temperature and humidity field inequality, affect the problems such as comfort level, the condenser coil of tertiary circuit is placed on to new wind to be processed in casing, wind pushing temperature can raise in the situation that the new wind water capacity of guarantee processing is constant, avoid the generation of the problems referred to above.New wind after treatment is sent after pressurizeing by pressure fan.
The utility model has following features compared with current traditional new blower fan group of direct evaporating water cooled type:
1. dehumidifying effect is large.The new blower fan group of traditional direct evaporating water cooled type is general only processes 23 DEG C of left and right by new wind, and the utility model is by multiple loops, new wind can be processed to corresponding water capacity while being 12 DEG C to dew-point temperature.
2. can stable operation within the scope of wide meteorological condition.The new blower fan group of tradition direct evaporating water cooled type is according to the outdoor air parameter designing of hot season, refrigerating capacity adjustable range is limited, the clammy season of and high humidity low in outdoor temperature, cannot realize the requirement that significantly reduces refrigerating capacity and meet again simultaneously moisture removal, and the utility model can address this problem well.
3. pair condensation heat reclaims, and has improved comfort level.Take away indoor all humidity loads for making novel wind energy, new wind need be processed to very low dew-point temperature, if the new wind of low temperature is directly sent into room and can be made people feel uncomfortable and bring the problems such as air outlet dewfall, the utility model is arranged on new wind by the condenser of third level refrigeration system and processes in casing, utilizing condensation heat to reclaim heats the new wind of low temperature drying, avoid use and the energy resource consumption of reheater, improved air-supply comfortableness and can not produce the problems such as air outlet dewfall.
Brief description of the drawings
Fig. 1 is this bright structural representation.
Detailed description of the invention
With reference to Fig. 1, the new blower fan group of a kind of direct evaporating water cooled type that the utility model provides, there is air inlet adjustment valve 2 one end that new wind is processed casing 1, and there is air cleaner 3 air inlet adjustment valve 2 inboards, and the other end has blower fan 9, and blower fan is driven by motor 8; Be provided with three refrigerating circuits that can move individually or simultaneously, the first refrigerating circuit is made up of the frequency-changeable compressor 10, the first plate type heat exchanger 13, the first fluid reservoir 15, the first device for drying and filtering 18, the first heating power expansion valve 21 and the first evaporimeter 4 that connect through refrigerant line, at the refrigerant inlet of the first evaporimeter 4, the first liquid-dividing head 24 is installed; The second refrigerating circuit is made up of the first constant speed compressor 11, the second plate type heat exchanger 14, the second fluid reservoir 16, the second device for drying and filtering 19, the second heating power expansion valve 22 and the second evaporimeter 5 that connect through refrigerant line, at the refrigerant inlet of the second evaporimeter 5, the second liquid-dividing head 25 is installed; The 3rd refrigerating circuit is made up of the second constant speed compressor 12 connecting through refrigerant line, condenser coil 7, the 3rd fluid reservoir 17, the 3rd device for drying and filtering 20, the 3rd heating power expansion valve 23 and the 3rd evaporimeter 6, at the refrigerant inlet of the 3rd evaporimeter 6, the 3rd liquid-dividing head 26 is installed; Wherein the first evaporimeter 4, the second evaporimeter 5, the 3rd evaporimeter 6 and condenser coil 7 are successively set between air cleaner 3 and blower fan 9, on the CWR 30 of the second plate type heat exchanger, electric control valve 27 are housed.
New wind is after the first evaporimeter 4, air themperature is reduced to 22 DEG C of left and right, the compressor of the first refrigerating circuit adopts frequency-changeable compressor, frequency-changeable compressor energy adjustment scope is large, the capacity that can correspondingly change compressor in the time that outdoor weather condition changes realizes the change of refrigerating capacity, ensures the requirement of leaving air temp.The first plate type heat exchanger 13 is condensers of the first refrigerating circuit, the type of cooling is water-cooled, in the first plate type heat exchanger 13, the cooling water that cold-producing medium and cooling water inlet pipe 28 transport carries out heat exchange, after the condensation heat that cooling water absorption refrigeration agent discharges, temperature raises, and is transported to cooling tower cooling by cooling water outlet pipe 29.
The design of the second refrigerating circuit is 15 DEG C by the second evaporimeter 5 leaving air temps to be carried out, and the second plate type heat exchanger 14 using as condenser in second servo loop is the same with the first plate type heat exchanger 13, and two kinds of fluid media (medium)s of heat exchange are cold-producing medium and cooling water.In the time that the second refrigerating circuit need to be carried out refrigerating capacity adjusting, by the aperture of controller control electric control valve 27, by regulating size control condensing pressure and the condensation temperature of cooling water flow, thereby regulate refrigerating capacity.
What the condenser of the 3rd refrigerating circuit adopted is condenser coil 7, for air-cooled condensing mode but not water-cooled condensing mode, condenser coil 7 is directly placed on new wind and processes in casing 1, new wind heats by the condenser coil 7 of the 3rd refrigerating circuit after by the first evaporimeter 4, the second evaporimeter 5, the 3rd evaporimeter 6 cooling and dehumidifyings again, in the case of ensureing to process the water capacity of the new wind wind pushing temperature that raises constant, new wind after treatment is sent after by blower fan 9 pressurizations.
When season in midsummer, outside air temperature is high, high humidity, and air enthalpy is high, and new blower fan group will provide very large processing enthalpy difference, and now three refrigerating circuits are all worked, and the frequency conversion unit of the first refrigerating circuit press maximum capacity operation, and unit is pressed maximum cooling capacity and is moved.New wind enters new wind by air inlet adjustment valve 2 and processes in casing 1, after filtering, air cleaner 3 passes through the first evaporimeter 4, after the first evaporimeter 4 cooling and dehumidifyings, air themperature is about 22 DEG C of left and right, then air enters the dehumidifying that is again cooled of the second evaporimeter 5, and after the second evaporimeter 5, air themperature is about 15 DEG C of left and right.New wind continues to flow through the 3rd evaporimeter 6 and carries out cooling and dehumidifying for the third time, after cooling through three grades, air themperature can reach 12 DEG C, the new wind of low temperature drying continues to flow through condenser coil 7, the water capacity of air is constant, temperature is increased to 22 DEG C of left and right, and new wind after treatment is processed casing 1 from new wind and sent after blower fan 9 pressurizations.When outside air temperature, damp condition change, the enthalpy of air also changes.In the time that air enthalpy declines, controller changes the rotating speed of frequency-changeable compressor in the first loop according to the reduction of air enthalpy, reduce refrigerating capacity, make air temperature control after the first evaporimeter 22 DEG C of left and right, in the time that outdoor air enthalpy is reduced to certain value, frequency-changeable compressor 10 shuts down, and the first refrigerating circuit is not worked, only the second refrigerating circuit, the 3rd refrigerating circuit work.In the time that outdoor enthalpy further reduces, electric control valve 27 will turn down gradually under the effect of controller, reduces the flow of the cooling water flowing through in the second plate type heat exchanger 14, makes condensing pressure increase, and reduces refrigerating capacity.Outdoor enthalpy continues to reduce while reaching load minimum of a value, first, second refrigerating circuit is not all worked, only have the second constant speed compressor 12 of the 3rd refrigerating circuit to open, the 3rd evaporimeter 6 carries out cooling and dehumidifying to new wind, and condenser coil 7 carries out heat again to the air after cooling and dehumidifying.In the wide operating mode changing at outdoor weather condition, this unit all can be stablized normal work, ensures the humidity processing of new wind, meets the instructions for use of humiture independence control air conditioner system.
The utility model is not limited to above-mentioned embodiment; anyone can draw other forms of product under enlightenment of the present utility model; as the plate type heat exchanger of water-cooled is changed into double pipe heat exchanger, changes constant speed compressor into frequency-changeable compressor etc.; no matter but do any variation in its shape or structure; every technical scheme identical or close with the utility model, all within protection domain.
Claims (5)
1. the new blower fan group of direct evaporating water cooled type, is characterized in that, there is air inlet adjustment valve (2) one end that new wind is processed casing (1), and there is air cleaner (3) air inlet adjustment valve (2) inboard, and the other end has blower fan (9); Be provided with three refrigerating circuits that can move individually or simultaneously, the first refrigerating circuit is made up of the frequency-changeable compressor connecting through refrigerant line (10), the first plate type heat exchanger (13), the first fluid reservoir (15), the first device for drying and filtering (18), the first heating power expansion valve (21) and the first evaporimeter (4); The second refrigerating circuit is made up of the first constant speed compressor (11) connecting through refrigerant line, the second plate type heat exchanger (14), the second fluid reservoir (16), the second device for drying and filtering (19), the second heating power expansion valve (22) and the second evaporimeter (5); The 3rd refrigerating circuit is made up of the second constant speed compressor (12) connecting through refrigerant line, condenser coil (7), the 3rd fluid reservoir (17), the 3rd device for drying and filtering (20), the 3rd heating power expansion valve (23) and the 3rd evaporimeter (6); Wherein the first evaporimeter (4), the second evaporimeter (5), the 3rd evaporimeter (6) and condenser coil (7) are successively set between air cleaner (3) and blower fan (9).
2. the new blower fan group of a kind of direct evaporating water cooled type according to claim 1, is characterized in that, at the refrigerant inlet of the first evaporimeter (4), the first liquid-dividing head (24) is installed.
3. the new blower fan group of a kind of direct evaporating water cooled type according to claim 1, is characterized in that, at the refrigerant inlet of the second evaporimeter (5), the second liquid-dividing head (25) is installed.
4. the new blower fan group of a kind of direct evaporating water cooled type according to claim 1, is characterized in that, at the refrigerant inlet of the 3rd evaporimeter (6), the 3rd liquid-dividing head (26) is installed.
5. the new blower fan group of a kind of direct evaporating water cooled type according to claim 1, is characterized in that, on the CWR (30) of the second plate type heat exchanger (14), electric control valve (27) is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132003.6U CN203757891U (en) | 2014-03-24 | 2014-03-24 | Direct-evaporation air cooling type fresh air handling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132003.6U CN203757891U (en) | 2014-03-24 | 2014-03-24 | Direct-evaporation air cooling type fresh air handling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203757891U true CN203757891U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420132003.6U Expired - Fee Related CN203757891U (en) | 2014-03-24 | 2014-03-24 | Direct-evaporation air cooling type fresh air handling unit |
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| Country | Link |
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| CN (1) | CN203757891U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940007A (en) * | 2014-03-24 | 2014-07-23 | 广东石油化工学院 | Direct evaporation type water-cooling fresh air unit |
| CN108633221A (en) * | 2018-03-22 | 2018-10-09 | 江苏兆胜特种空调有限公司 | High-power electronic device multi-state liquid cooling source |
| CN111137312A (en) * | 2020-01-22 | 2020-05-12 | 中车大连机车研究所有限公司 | A rail vehicle refrigeration system with fresh air pre-cooling function |
-
2014
- 2014-03-24 CN CN201420132003.6U patent/CN203757891U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940007A (en) * | 2014-03-24 | 2014-07-23 | 广东石油化工学院 | Direct evaporation type water-cooling fresh air unit |
| CN108633221A (en) * | 2018-03-22 | 2018-10-09 | 江苏兆胜特种空调有限公司 | High-power electronic device multi-state liquid cooling source |
| CN111137312A (en) * | 2020-01-22 | 2020-05-12 | 中车大连机车研究所有限公司 | A rail vehicle refrigeration system with fresh air pre-cooling function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG YASHI CO., LTD. Free format text: FORMER OWNER: YASHI AIR CONDITIONER (GUANGZHOU) CO., LTD. Effective date: 20150715 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150715 Address after: 525000 Guangdong Petrochemical Institute, No. 139 Guandu Road, Guangdong, Maoming Patentee after: Guangdong University of Petrochemical Technology Patentee after: Shandong Yashi Co., Ltd. Address before: 525000 Guandu, Guangdong Province, No. two road, No., the compound of the 139 Patentee before: Guangdong University of Petrochemical Technology Patentee before: Yashi Air Conditioner (Guangzhou) Co Ltd |
|
| 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: 20140806 Termination date: 20170324 |