CN201672748U - Multifunctional air conditioning and water heating all-in-one machine - Google Patents
Multifunctional air conditioning and water heating all-in-one machine Download PDFInfo
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- CN201672748U CN201672748U CN2010201423439U CN201020142343U CN201672748U CN 201672748 U CN201672748 U CN 201672748U CN 2010201423439 U CN2010201423439 U CN 2010201423439U CN 201020142343 U CN201020142343 U CN 201020142343U CN 201672748 U CN201672748 U CN 201672748U
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Abstract
A multifunctional air conditioning and water heating all-in-one machine comprises the following fittings: a compressor (1), a hot water heat exchanger (4), an air heat exchanger (6), an air conditioning heat exchanger (10), etc. The main components of one set of heat pump system are used. A structure with three compound-connected heat exchangers and double four-way reversing valves is adopted. The multifunctional air conditioning and water heating all-in-one machine has the following four operation modes: refrigeration and hot water preparation, hot water preparation, heating and hot water preparation, and defrosting. The multifunctional air conditioning and water heating all-in-one machine has a high heat exchange efficiency and simultaneously improves the energy efficiency ratio of the unit. The heat pipe heat exchangers are adopted for settling the problems of easy leakage of heat exchanger and water quality pollution. Furthermore an abuse of large resistance when a plurality of heat exchangers are connected in series is overcome.
Description
Technical field
The utility model relates to a kind of heat pump type air conditioner, hot water facility, particularly a kind of energy-efficient multi-functional air conditioner hot-water integration equipment.
Background technology
The air-cooled heat pump air-conditioning equipment and the air source heat pump hot water facility of China are two kinds of separate distinct devices basically at present, conventional air-cooled heat pump air-conditioning equipment can only provide refrigeration, heat, though and the air-source heat pump hot water group that development in recent years is got up is a kind of energy-saving equipment, only provide health hot water; Though the used heat of discharging when having research report to claim to adopt electric compression air conditioner refrigerating produces health hot water, just produces hot water in air conditioner refrigerating, can not solve the round-the-clock problem that heats water.It is basic that air-cooled heat-pump air-conditioner group and air-source heat pump hot water group adopt
Principle is identical, but the former generally only is used for air-conditioning, and spring and autumn, season, equipment was in idle state, and the equipment that makes is underutilized; The latter can only be used for productive life hot water, and the function and the energy utilization rate of equipment are fully excavated.In addition, for the air-source heat pump hot water group that generally adopts on the market, adopt traditional heat exchanger, quality is very unstable, and the lower and easy leakage of heat exchange efficiency is for the heat exchanger that links to each other with heat storage water tank, when it takes place to reveal, refrigeration working medium can be penetrated in the heat storage water tank, pollutes, give the health hot water of confession cause unsafe factor.
The utility model content
The technical problems to be solved in the utility model is, deficiency at the prior art existence, a kind of multi-functional air conditioner hot water integrated machine is proposed, as the air conditioning hot integration apparatus that is used for the supply of central air-conditioning and central hot water, can solve problems such as traditional air-conditioning, hot water facility function singleness, energy utilization rate are low; Adopt same set of equipment, can freeze summer, can heat winter, can provide health hot water throughout the year, can improve the when annual utilization rate of equipment and installations of comprehensive efficiency of equipment.
The technical solution of the utility model is, described multi-functional air conditioner hot water integrated machine comprises compressor, hot water heat exchanger, air heat exchanger, air-condition heat exchanger, its design feature is, the working medium suction inlet of described compressor connects with the D port of first four-way change-over valve, the sender property outlet of this compressor connects with the A port of second four-way change-over valve, the B port of first four-way change-over valve connects with the D port of second four-way change-over valve, the B port of second four-way change-over valve connects with a working medium port of hot water heat exchanger, another working medium port of hot water heat exchanger connects with the A port of first three-way diverter valve, the C port of second four-way change-over valve connects with the C port of first three-way diverter valve, the C port of first four-way change-over valve connects with a working medium port of air heat exchanger, and the A port of this first four-way change-over valve connects with a working medium port of air-condition heat exchanger; Another working medium port of air heat exchanger through parallel connection first expansion valve of first check valve connect with the B port of first three-way diverter valve, another working medium port of air-condition heat exchanger through parallel connection second expansion valve of second check valve connect with the B port of first three-way diverter valve.
Below make and further specifying.
The operation principle of the utility model unit is, summer, the air-condition heat exchanger that links to each other with air conditioning terminal was the evaporation ends heat absorption when freezing, and hot water heat exchanger is a condensation end during beginning, and absorption refrigeration is discharged condensation heat and produced health hot water; Along with hot water temperature's continuous rising, condensation temperature increases, and at this moment the corresponding reduction of refrigeration efficiency switches to the pattern of hot water heat exchanger and air heat exchanger tandem working, promptly discharges unnecessary condensation waste heat heat hot water the time, reduces condensing pressure; When hot water is heated to design temperature, stop to heat water, switching to air heat exchanger is that condensation end is discharged used heat; During the winter heat supply, air heat exchanger is an evaporimeter, and air-condition heat exchanger carries out air-conditioning as condenser and heats, and also hot water heat exchanger and air-condition heat exchanger can be connected in series as condenser, produces health hot water when heating.At the state of heating, can carry out accumulation of heat to regenerative apparatus, but when needing heat supply by regenerative apparatus to user's heat supply or directly to user's heat supply.Can utilize the heat in the regenerative apparatus during defrosting, increase the speed of defrosting.When not needing season in spring and autumn cooling and warming only need produce health hot water, unit moves in the mode of air-source heat pump hot water group.
The utility model unit has refrigeration+heat water, heats water, heats+heat water, four kinds of mode of operations of defrosting, and referring to Fig. 1, the system architecture and the course of work under these four kinds of mode of operations are described as follows.
(1) the water conservancy project operation mode freezes+heat: the A of second three-way diverter valve 13, C port are communicated with, air-condition heat exchanger 10 is an evaporimeter, not absorbing heat the end system from air-conditioning freezes system, hot water heat exchanger 4 is a condensation end during beginning, the A port of first four-way change-over valve 2 is communicated with the D port, the B port is communicated with the C port, the A port of second four-way change-over valve 3 is communicated with the B port, the C port is communicated with the D port, and the A port of first three-way diverter valve 5 is communicated with the B port; After evaporating, cold-producing medium becomes the gas of low-temp low-pressure in air-condition heat exchanger 10, by entering compressor 1 behind first four-way change-over valve 2, become the gas of HTHP after the compression, again through behind second four-way change-over valve 3, condensation heat release in hot water heat exchanger 4 becomes the liquid of cryogenic high pressure, at last by first three-way diverter valve 5, after 9 step-downs of second expansion valve, enter air-condition heat exchanger 10, the circulation of beginning next round; Continuous rising along with the heat storage water tank water temperature, the unit condensation temperature increases, refrigerating capacity correspondingly reduces, switch to the pattern of hot water heat exchanger 4 and air heat exchanger 6 tandem workings this moment, promptly the system health hot water in unnecessary condensation heat, discharge by air heat exchanger 6, to reduce condensation temperature and pressure, this moment, the AC of first three-way diverter valve 5 was communicated with, two four-way change-over valve commutation positions 2,3 is constant, cold-producing medium is through behind the hot water heat exchanger 4, through first three-way diverter valve 5, second four-way change-over valve 3, entering air heat exchanger 6 behind first four-way change-over valve 2 cools off once more, after 9 step-downs of second expansion valve, get back to air-condition heat exchanger 10 then, enter the next round circulation; When hot water is heated to design temperature and needs refrigeration, first four-way change-over valve 2 commutation position is constant, the AD of second four-way change-over valve 3 links to each other, after cold-producing medium comes out from compressor 1, enter air heat exchanger 6 heat that leaves by second four-way change-over valve 3, first four-way change-over valve 2, through getting back to air-condition heat exchanger 10 after 9 step-downs of second expansion valve, enter the next round circulation.
(2) heat the water conservancy project operation mode separately: the A port of first three-way diverter valve 5 is communicated with the B port, the C port of first four-way change-over valve 2 is connected with the D port, the A port of second four-way change-over valve 3 is connected with the B port, cold-producing medium evaporates the back and enters compressor 1 by first four-way change-over valve 2 in air heat exchanger 6, the high temperature and high pressure gas that comes out from compressor 1 enters hot water heat exchanger 4 condensation heat releases by second four-way change-over valve 3 provides heat for heat storage water tank, condensed cryogenic high pressure refrigerant liquid is successively by first three-way diverter valve 5, get back to air heat exchanger 6 behind first expansion valve 7, the circulation of beginning next round.
(3) heat+heat aqueous mode: when heating separately, the A port of first four-way change-over valve 2 is communicated with the B port, the C port is communicated with the D port, the A port of second four-way change-over valve 3 is communicated with the D port, the B port is communicated with the C port, cold-producing medium is after air heat exchanger 6 evaporations, through entering compressor 1 behind two four-way change-over valves 2,3, enter into air-condition heat exchanger 10 by second four-way change-over valve 3 again, heat is offered not end system of air-conditioning; At this moment, the AC of second three-way diverter valve 13 is connected and directly for the air-conditioning system heat supply, and it is the air-conditioning system heat supply that AB is connected when giving the regenerative apparatus accumulation of heat; Unit can provide health hot water when heating, this moment, the A port of first four-way change-over valve 2 was communicated with the B port, the C port is communicated with the D port, the A port of second four-way change-over valve 3 is communicated with the B port, the D port is communicated with the C port, the A port of first three-way diverter valve 5 links to each other with the C port, cold-producing medium is after air heat exchanger 6 evaporations, enter compressor 1 through first four-way change-over valve 2, and enter hot water heat exchanger 4 by second four-way change-over valve 3 simultaneously and heat water, then successively by first three-way diverter valve 5, second four-way change-over valve 3, first four-way change-over valve 2 enters air-condition heat exchanger 10 and carries out the condensation heat release, get back to air heat exchanger 6 by 7 step-downs of first expansion valve at last, enter the next round circulation.Control system can preferentially heat or preferentially heat water according to user's needs.
(4) defrosting mode: heat in the winter time or when producing health hot water, air heat exchanger is frosting sometimes, at this moment can for absorbing regenerative apparatus 12 heats, evaporimeter defrost by air-condition heat exchanger 10, the AB of second three-way diverter valve 13 is communicated with, the A port of first four-way change-over valve 2 and second four-way change-over valve 3 is connected with the D port, the B port is connected with the C port, cold-producing medium is after air-condition heat exchanger 10 heat absorption evaporations, enter compressor 1 by first four-way change-over valve 2, then successively by second four-way change-over valve 3, entering air heat exchanger 6 condensation heat releases behind first four-way change-over valve 2 defrosts, after 9 step-downs of second expansion valve, get back to air-condition heat exchanger 10, enter the next round circulation.
More than four kinds of different operational modes can automatically switch according to different weather conditions and user's request by intelligence control system, under the situation that fully satisfies the multi-functional demand of user, reach the purpose that maximum improves energy utilization rate.
The utility model has been realized the function of air-cooled heat pump air-conditioning equipment and air source heat pump hot water facility simultaneously in same unit, it only uses the critical piece (as compressor etc.) of a cover heat pump; Simultaneously, system has adopted three structures that heat exchanger mixes connection, two four-way change-over valves, three heat exchangers can be the heat exchangers of new and effective heat exchange of heat pipe or other type, heat pipe in the heat exchange of heat pipe is a kind of high-performance heat transfer components, the capacity of heat transmission is very high, with its form heat exchange of heat pipe not only have the intrinsic heat output of heat pipe big, have a narrow range of temperature, characteristics such as volume in light weight is little, thermal response is rapid, but also have easy for installation, easy to maintenance, long service life, characteristics such as drag losses is little, the heat transfer runner is convenient to separate, do not leak through with each other; It can be phase transition heat accumulation unit or other regenerative apparatuses that air-condition heat exchanger place string has regenerative apparatus, regenerative apparatus.
As known from the above, the utility model is a kind of multi-functional air conditioner hot water integrated machine, can freeze, heats and produce health hot water throughout the year efficiently and stably, has high comprehensive Energy Efficiency Ratio; When summer refrigeration, heat production water, can guarantee higher refrigerating efficiency, can heat health hot water fast again, overcome general air conditioner water heating machine refrigeration efficiency than and the conflicting shortcoming of hot water firing rate, and solved general air conditioner water heating machine along with hot water temperature's the corresponding reduction of rising refrigerating efficiency, the unit problem of unstable that becomes; During winter heating, heat production water and accumulation of heat can be carried out simultaneously, heat with heat production water to be independent of each other, and have solved temperature when low, heat not enough problem.Adopt heat exchange of heat pipe, heat exchange efficiency is improved, the Energy Efficiency Ratio of unit is improved, solved that heat exchanger easily leaks, the problem of polluted water, and the big drawback of resistance when having overcome a plurality of heat exchangers series connection.
Description of drawings
Fig. 1 is the system architecture schematic diagram of a kind of embodiment of the utility model.
In the drawings:
The 1-compressor, first four-way change-over valve of 2-, second four-way change-over valve of 3-,
The 4-hot water heat exchanger, first three-way diverter valve of 5-, the 6-air heat exchanger,
7-first expansion valve, 8-first check valve, 9-second expansion valve,
The 10-air-condition heat exchanger, 11-water pump 12-regenerative apparatus,
Second three-way diverter valve of 13-, 14-second check valve.
The specific embodiment
As shown in Figure 1, multi-functional air conditioner hot water integrated machine described in the utility model comprises compressor 1, hot water heat exchanger 4, air heat exchanger 6, air-condition heat exchanger 10; The working medium suction inlet of described compressor 1 connects with the D port of first four-way change-over valve 2, the sender property outlet of this compressor 1 connects with the A port of second four-way change-over valve 3, the B port of first four-way change-over valve 2 connects with the D port of second four-way change-over valve 3, the B port of second four-way change-over valve 3 connects with a working medium port of hot water heat exchanger 4, connecting of hot water heat exchanger 4 according to another the A port of a working medium port with first three-way diverter valve 5, the C port of second four-way change-over valve 3 connects with the C port of first three-way diverter valve 5, the C port of first four-way change-over valve 2 connects with a working medium port of air heat exchanger 6, and the A port of this first four-way change-over valve 2 connects with a working medium port of air-condition heat exchanger 10; Another working medium port of air heat exchanger 6 through parallel connection first expansion valve 7 of first check valve 8 connect with the B port of first three-way diverter valve 5, another working medium port of air-condition heat exchanger 10 through parallel connection second expansion valve 9 of second check valve 14 connect with the B port of first three-way diverter valve 5.
Described hot water heat exchanger (4), air heat exchanger (6), air-condition heat exchanger (10) adopt high-efficiency heat pipe heat exchanger (can select existing procucts for use), also can adopt other various suitable heat exchangers of prior art.
Two heat transferring mediums (water) of described hot water heat exchanger connect a heat storage water tank and form the loop into and out of end; Also at second three-way diverter valve in air-condition heat exchanger 10 water sides, 13 serial connection regenerative apparatuses 12.
Claims (5)
1. multi-functional air conditioner hot water integrated machine, comprise compressor (1), hot water heat exchanger (4), air heat exchanger (6), air-condition heat exchanger (10), it is characterized in that, the working medium suction inlet of described compressor (1) connects with the D port of first four-way change-over valve (2), the sender property outlet of this compressor (1) connects with the A port of second four-way change-over valve (3), the B port of first four-way change-over valve (2) connects with the D port of second four-way change-over valve (3), a working medium port of the same hot water heat exchanger of B port (4) of second four-way change-over valve (3) connects, connecting of hot water heat exchanger (4) according to another the A port of a working medium port with first three-way diverter valve (5), the C port of second four-way change-over valve (3) connects with the C port of first three-way diverter valve (5), a working medium port of the same air heat exchanger of C port (6) of first four-way change-over valve (2) connects, and a working medium port of the same air-condition heat exchanger of A port (10) of this first four-way change-over valve (2) connects; Another working medium port of air heat exchanger (6) through parallel connection first expansion valve (7) of first check valve (8) connect with the B port of first three-way diverter valve (5), another working medium port of air-condition heat exchanger (10) through parallel connection second expansion valve (9) of second check valve (14) connect with the B port of first three-way diverter valve (5).
2. according to the described multi-functional air conditioner hot water integrated machine of claim 1, it is characterized in that:
I, described all-in-one unit are when freezing+heating the water conservancy project operation mode, the A port of first four-way change-over valve (2) is communicated with the D port, the B port is communicated with the C port, the A port of second four-way change-over valve (3) is communicated with the B port, the C port is communicated with the D port, and the A port of first three-way diverter valve (5) is communicated with the B port;
II, described all-in-one unit are when heating the water conservancy project operation mode separately, the A port of first three-way diverter valve (5) is communicated with the B port, the C port of first four-way change-over valve (2) is connected with the D port, and the A port of second four-way change-over valve (3) is connected with the B port;
III, described all-in-one unit are for heating+heat aqueous mode, and when heating separately, the A port of first four-way change-over valve (2) is communicated with the B port, the C port is communicated with the D port, and the A port of second four-way change-over valve (3) is communicated with the D port, the B port is communicated with the C port; When unit provides health hot water when heating, the A port of first four-way change-over valve (2) is communicated with the B port, the C port is communicated with the D port, the A port of second four-way change-over valve (3) is communicated with the B port, the D port is communicated with the C port, and the A port of first three-way diverter valve (5) links to each other with the C port;
IV, when described all-in-one unit is defrosting mode, the A port of first four-way change-over valve (2) and second four-way change-over valve (3) is connected with the D port, the B port is connected with the C port.
3. according to the described high efficiency energy saving air conditioner hot water integrated machine of claim 1, it is characterized in that described hot water heat exchanger (4), air heat exchanger (6), air-condition heat exchanger (10) adopt the high-efficiency heat pipe heat exchanger.
4. according to the described multi-functional air conditioner hot water integrated machine of claim 1, it is characterized in that, at air-condition heat exchanger (10) second three-way diverter valve in water side (13) serial connection regenerative apparatus (12).
5. according to the described multi-functional air conditioner hot water integrated machine of claim 1, it is characterized in that two heat transferring mediums of described hot water heat exchanger connect a heat storage water tank and form the loop into and out of end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201423439U CN201672748U (en) | 2010-03-26 | 2010-03-26 | Multifunctional air conditioning and water heating all-in-one machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201423439U CN201672748U (en) | 2010-03-26 | 2010-03-26 | Multifunctional air conditioning and water heating all-in-one machine |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101813401A (en) * | 2010-03-26 | 2010-08-25 | 江乐新 | Energy-saving air-conditioning/hot water triple-supply system |
| CN102128528A (en) * | 2011-03-30 | 2011-07-20 | 华南理工大学 | Phase change heat accumulating defrosting system for air source heat pump water heater |
| CN102506479A (en) * | 2011-11-10 | 2012-06-20 | 广东美的电器股份有限公司 | Air conditioning system |
| CN102635973A (en) * | 2011-02-14 | 2012-08-15 | 苏州巴米特信息科技有限公司 | Distinctive device for refrigerating, heating and hot water supplying |
| CN102645060A (en) * | 2012-03-30 | 2012-08-22 | 美的集团有限公司 | Multi-split air conditioning system |
| CN102889654A (en) * | 2012-10-24 | 2013-01-23 | 长沙全益暖通设备有限公司 | Cold and heat accumulation type hot-water air conditioner |
| CN102901165A (en) * | 2012-03-23 | 2013-01-30 | 刘雄 | Air treatment equipment water system |
| CN103502748A (en) * | 2011-04-28 | 2014-01-08 | 松下电器产业株式会社 | Freezer |
| CN103574968A (en) * | 2012-08-08 | 2014-02-12 | 珠海格力电器股份有限公司 | Multifunctional air-conditioning system |
| CN103836792A (en) * | 2014-03-24 | 2014-06-04 | 大连工业大学 | Heat pump and hot water heating combination system |
| CN103900288A (en) * | 2014-04-04 | 2014-07-02 | 中交第二航务工程勘察设计院有限公司 | Heat pump unit for harbor districts and control method thereof |
| CN105444454A (en) * | 2015-12-29 | 2016-03-30 | 江门市迪思高科技有限公司 | Pressure control type air energy water heater and control method |
| CN106016592A (en) * | 2016-05-24 | 2016-10-12 | 南京天加空调设备有限公司 | Control method for total heat recovery air-cooled chiller unit or hot water unit |
| CN106052123A (en) * | 2016-07-27 | 2016-10-26 | 许继鲁 | Air conditioner and air energy water heater combined device |
| CN109798688A (en) * | 2019-01-15 | 2019-05-24 | 合肥美的暖通设备有限公司 | Air-conditioning and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101813401A (en) * | 2010-03-26 | 2010-08-25 | 江乐新 | Energy-saving air-conditioning/hot water triple-supply system |
| CN101813401B (en) * | 2010-03-26 | 2012-08-22 | 江乐新 | Energy-saving air-conditioning/hot water triple-supply system |
| CN102635973A (en) * | 2011-02-14 | 2012-08-15 | 苏州巴米特信息科技有限公司 | Distinctive device for refrigerating, heating and hot water supplying |
| CN102128528B (en) * | 2011-03-30 | 2012-07-18 | 华南理工大学 | Phase change heat accumulating defrosting system for air source heat pump water heater |
| CN102128528A (en) * | 2011-03-30 | 2011-07-20 | 华南理工大学 | Phase change heat accumulating defrosting system for air source heat pump water heater |
| CN103502748A (en) * | 2011-04-28 | 2014-01-08 | 松下电器产业株式会社 | Freezer |
| US9157684B2 (en) | 2011-04-28 | 2015-10-13 | Panasonic Intellectual Property Management Co., Ltd. | Refrigeration apparatus |
| CN103502748B (en) * | 2011-04-28 | 2016-01-13 | 松下电器产业株式会社 | Refrigerating plant |
| CN102506479A (en) * | 2011-11-10 | 2012-06-20 | 广东美的电器股份有限公司 | Air conditioning system |
| CN102901165A (en) * | 2012-03-23 | 2013-01-30 | 刘雄 | Air treatment equipment water system |
| CN102901165B (en) * | 2012-03-23 | 2016-12-21 | 刘雄 | Air treatment equipment water system |
| CN102645060A (en) * | 2012-03-30 | 2012-08-22 | 美的集团有限公司 | Multi-split air conditioning system |
| CN103574968B (en) * | 2012-08-08 | 2016-05-25 | 珠海格力电器股份有限公司 | Multi-functional air regulating system |
| CN103574968A (en) * | 2012-08-08 | 2014-02-12 | 珠海格力电器股份有限公司 | Multifunctional air-conditioning system |
| CN102889654A (en) * | 2012-10-24 | 2013-01-23 | 长沙全益暖通设备有限公司 | Cold and heat accumulation type hot-water air conditioner |
| CN105627625A (en) * | 2014-03-24 | 2016-06-01 | 张明 | Hybrid heating process of heat pump and hot water heating combined system |
| CN103836792B (en) * | 2014-03-24 | 2016-03-02 | 大连工业大学 | Heat pump and hot water heating combined system |
| CN105627624A (en) * | 2014-03-24 | 2016-06-01 | 张明 | Separate heating process of heat pump and hot water heating combined system |
| CN103836792A (en) * | 2014-03-24 | 2014-06-04 | 大连工业大学 | Heat pump and hot water heating combination system |
| CN105627625B (en) * | 2014-03-24 | 2018-04-10 | 青海大学 | Heat pump and the mixing heating flow of hot water heating combined system |
| CN105627624B (en) * | 2014-03-24 | 2018-04-10 | 青海大学 | Heat pump and the independent heating flow of hot water heating combined system |
| CN103900288A (en) * | 2014-04-04 | 2014-07-02 | 中交第二航务工程勘察设计院有限公司 | Heat pump unit for harbor districts and control method thereof |
| CN103900288B (en) * | 2014-04-04 | 2016-08-24 | 中交第二航务工程勘察设计院有限公司 | A kind of port district source pump and control method thereof |
| CN105444454A (en) * | 2015-12-29 | 2016-03-30 | 江门市迪思高科技有限公司 | Pressure control type air energy water heater and control method |
| CN106016592A (en) * | 2016-05-24 | 2016-10-12 | 南京天加空调设备有限公司 | Control method for total heat recovery air-cooled chiller unit or hot water unit |
| CN106052123A (en) * | 2016-07-27 | 2016-10-26 | 许继鲁 | Air conditioner and air energy water heater combined device |
| CN109798688A (en) * | 2019-01-15 | 2019-05-24 | 合肥美的暖通设备有限公司 | Air-conditioning and its control method |
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Granted publication date: 20101215 Effective date of abandoning: 20120822 |