CN100504196C - Healthy dehumidification type air conditioner - Google Patents
Healthy dehumidification type air conditioner Download PDFInfo
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- CN100504196C CN100504196C CNB2006101270272A CN200610127027A CN100504196C CN 100504196 C CN100504196 C CN 100504196C CN B2006101270272 A CNB2006101270272 A CN B2006101270272A CN 200610127027 A CN200610127027 A CN 200610127027A CN 100504196 C CN100504196 C CN 100504196C
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Abstract
This invention is a healthy dehumidifying air conditioner. It includes compressor, electromagnetic four-way reversing valve, outdoor heat exchanger, outdoor fan, outdoor electron expansion valve, indoor heat exchanger and dehumidifying capillary tube. The said indoor heat exchanger is divided into heating section and dehumidifying section. Refrigerants are divided into four parts to enter the said air conditioner indoor heat exchanger. Two parts enter the indoor heat exchanger heating section, while the other two parts enter the dehumidifying section. This system also includes two dehumidifying electromagnetic valves that are respectively arranged on the passing pipeline of the heating section and dehumidifying section. This invention can keep indoor temperature and not influence the cooling and heating capability. When dehumidifying, It greatly increases the heat exchanging efficiency.
Description
Technical field
The present invention relates to a kind of air-conditioner that dehumidifies, and relates more specifically to a kind of healthy dehumidification type air conditioner, in dehumidifying, can keep room temperature constant substantially.
Background technology
Existing room air conditioner has dehumidification function, but this dehumidifying and refrigeration do not have difference in essence, it only is height according to room temperature, the control room inner blower is to realize than the low slightly wind speed of cooling operation or the mode of intermittent working, can not control the temperature in room during the dehumidifying running, the wind pushing temperature of air-conditioning is low, the reduction that in dehumidifying, can bring room temperature, under the not too high situation of indoor temperature, the reduction of room temperature or air-conditioning wind pushing temperature are too low all can to bring discomfort to people.
In order to reach the not purpose of cool-down dehumidification, one dehumidifying control system for air conditioner is arranged, it comprises: compressor, four-way change-over valve, indoor heat exchanger, outdoor heat exchanger and throttle mechanism, the main throttle mechanism that outdoor heat exchanger connects is in the state of opening fully, indoor heat exchanger is divided into two sections, series connection one chromaffin body stream mechanism between two sections heat exchangers, chromaffin body stream mechanism is in throttle, no matter like this in kind of refrigeration cycle, still in heating circulation, the cold-producing medium that at first enters in the leading portion indoor heat exchanger is in condensation heat release state, this section indoor heat exchanger is the section that heats up, and flows at middle chromaffin body under the throttling action of mechanism, and the cold-producing medium that enters the back segment indoor heat exchanger is a low-pressure fluid, just in time be in the heat absorption evaporating state, this section indoor heat exchanger is realized effect on moisture extraction for the dehumidifying section, and this dehumidification control system guarantees that the heat exchanger in the indoor set always has one section heat exchanger to be in the refrigeration mode running, realize respectively the acting in conjunction of condensation and evaporation reaching the not technique effect of cool-down dehumidification by two sections heat exchangers.
But above-mentioned dehumidifying control system for air conditioner just couples together two parts of indoor heat exchanger with chromaffin body stream mechanism simply, cold-producing medium single channel turnover indoor heat exchanger, and heat exchange efficiency reduces, and cold-producing medium is bigger at ducted mobile sound.
Summary of the invention
Its purpose of constant temperature dehumidification air-conditioner of the present invention is to address the above problem and is not enough, a kind of healthy dehumidification type air conditioner is provided, when room humidity and humidity load than higher, but can keep room temperature constant substantially under the situation that room temperature is lower and thermic load is less, reduce space air humidity simultaneously, and dehumidifying does not influence the refrigeration of air-conditioner and heats behavior in service the time, by to the refrigeration system reasonable diffluence, improve refrigeration, heat and the heat exchange efficiency in when operation of dehumidifying, and can reduce cold-producing medium at ducted mobile sound, for the user provides a comfortable indoor environment.
For achieving the above object, described healthy dehumidification type air conditioner has following primary structure:
This air-conditioner system comprises compressor, electromagnetism four-way change-over valve, outdoor heat exchanger, outdoor fan, outdoor electric expansion valve, indoor heat exchanger, dehumidifying capillary.
Described indoor heat exchanger has been divided into two parts, and when the dehumidifying operation mode, wherein a part plays a part evaporimeter for indoor heat exchanger dehumidifying section, and another part is the indoor heat exchanger bringing-up section, plays a part condenser.
Cold-producing medium is divided into four the tunnel and passes in and out described air-conditioner indoor heat exchanger, and wherein the two-way cold-producing medium passes in and out the indoor heat exchanger bringing-up section, and this two-way cold-producing medium enters simultaneously from the lower end of indoor heat exchanger bringing-up section respectively, and this section heat exchanger of flowing through flows out from the upper end simultaneously; The two-way cold-producing medium passes in and out indoor heat exchanger dehumidifying section in addition, and this two-way cold-producing medium enters simultaneously from the lower end of indoor heat exchanger dehumidifying section respectively, and this section heat exchanger of flowing through flows out from the upper end simultaneously.This cold-producing medium shunt method, it is long-pending by the fluid cross-section of tubulation to be equivalent to increase cold-producing medium, shortened the length of pipe group tubulation, suitably increased the flow of cold-producing medium, evaporation or the speeding up of condensation, the equilibrium that also helps cold-producing medium is flowed, the heat exchange efficiency that improved system greatly, also can reduce simultaneously the flow velocity of cold-producing medium in pipeline, thereby reduce the mobile sound of cold-producing medium on pipeline.
One cold-producing medium knockout is set in the pipeline before outdoor refrigerant enters indoor heat exchanger, is used for the cold-producing medium that outdoor heat exchanger is come is split into multichannel, send into the dehumidifying section and the bringing-up section of indoor heat exchanger respectively.
Described air-conditioning system, also comprise two dehumidifying magnetic valves, wherein the second dehumidifying magnetic valve is arranged on the pipeline between cold-producing medium knockout and the indoor heat exchanger dehumidifying section inlet, on the pipeline that the first dehumidifying magnetic valve is arranged on that the indoor heat exchanger bringing-up section exports and indoor set is given vent to anger between the house steward.
The dehumidifying capillary is arranged on the pipeline that connects between outlet of indoor heat exchanger bringing-up section and the indoor heat exchanger dehumidifying section inlet.
In the refrigeration pipe of above-mentioned indoor, also be provided with three separatory threeways, wherein first separatory three is common to the synthetic loop of two return line of indoor heat exchanger bringing-up section, second separatory three is common to a synthetic loop is divided into two pipelines again, article one, pipeline is connected with the dehumidifying magnetic valve, another pipeline is connected with the dehumidifying capillary, and the 3rd separatory three is common to the cold-producing medium that will enter indoor heat exchanger dehumidifying section with coming from the cold-producing medium knockout or is divided into two the tunnel and sends into indoor heat exchanger dehumidifying section from come cold-producing medium through the dehumidifying capillary-compensated of bringing-up section.
The described first dehumidifying magnetic valve and the second dehumidifying magnetic valve are open type heavy caliber magnetic valve, and when air-conditioner was in the dehumidifying operation mode, energising was closed, and cold-producing medium this moment can only be by the dehumidifying capillary; When air-conditioner is in refrigeration and heats operation mode, outage, the dehumidifying magnetic valve is opened, but cold-producing medium non-resistance basically passes through the dehumidifying magnetic valve, the pressure loss can be ignored, the capillary that dehumidifies this moment is inoperative, does not influence normal refrigeration and heating effect, and the throttling step-down of this moment and the Flow-rate adjustment of cold-producing medium are finished by outdoor electric expansion valve.
The motor of described outdoor fan adopts the alternating current generator with 2 grades of wind speed.
When air-conditioner was in described dehumidifying operation mode, the operating frequency of outdoor compressor was to carry out fuzzy control according to indoor current humidity (being detected by the indoor humidity sensor that is positioned in the air-conditioner) and the difference of setting humidity (by the setting of controllers such as remote controller).
Content to sum up, when can being implemented in dehumidifying, described healthy dehumidification type air conditioner keep room temperature constant substantially, and dehumidifying does not influence the refrigeration of air-conditioner and heats behavior in service the time, by to the refrigeration system reasonable diffluence, heat exchange efficiency when having improved refrigeration greatly, heat and having dehumidified operation, simultaneously also reduced cold-producing medium, for the user provides a most comfortable indoor environment at ducted mobile sound.
Description of drawings
The schematic diagram of the existing dehumidifying control system for air conditioner of Fig. 1
Fig. 2 constant temperature dehumidification air-conditioner system of the present invention schematic diagram
As shown in Figure 1, compressor 1, indoor heat exchanger bringing-up section 2, outdoor heat exchanger 3, main throttle mechanism 4, chromaffin body stream mechanism 5, indoor heat exchanger dehumidifying section 6, four-way change-over valve 7;
As shown in Figure 2, compressor 8, electromagnetism four-way change-over valve 9, outdoor heat exchanger 10, outdoor electric expansion valve 11, outdoor fan 12, cold-producing medium knockout 13, indoor heat exchanger 14, indoor heat exchanger bringing-up section 14a, indoor heat exchanger dehumidifying section 14b, the first separatory threeway, 15, the second separatory threeways 16, the 3rd separatory threeway 17, the first dehumidifying magnetic valve, 18, the second dehumidifying magnetic valves 19, dehumidifying capillary 20.
The specific embodiment
As shown in Figure 2, this air-conditioner system comprises compressor 8, electromagnetism four-way change-over valve 9, outdoor heat exchanger 10, outdoor fan 12, outdoor electric expansion valve 11, indoor heat exchanger 14, dehumidifying capillary 20.
Described indoor heat exchanger 14 has been divided into two parts, and when the dehumidifying operation mode, wherein a part plays a part evaporimeter for indoor heat exchanger dehumidifying section 14b, and another part is indoor heat exchanger bringing-up section 14a, plays a part condenser.
Cold-producing medium is divided into four the tunnel and passes in and out described air-conditioner indoor heat exchanger 14, wherein the two-way cold-producing medium passes in and out indoor heat exchanger bringing-up section 14a, this two-way cold-producing medium enters simultaneously from the lower end of indoor heat exchanger bringing-up section 14a respectively, and this section heat exchanger of flowing through flows out from the upper end simultaneously; The two-way cold-producing medium passes in and out an indoor heat exchanger dehumidifying section 14b in addition, and this two-way cold-producing medium enters simultaneously from the lower end of indoor heat exchanger dehumidifying section 14b respectively, and this section heat exchanger of flowing through flows out from the upper end simultaneously.
The first dehumidifying magnetic valve 18 and the second dehumidifying magnetic valve 19 have also been comprised in the described air-conditioning system, wherein the second dehumidifying magnetic valve 19 is arranged on the pipeline between cold-producing medium knockout 13 and the indoor heat exchanger dehumidifying section 14b inlet, on the pipeline that another first dehumidifying magnetic valve 18 is arranged on that indoor heat exchanger bringing-up section 14a exports and indoor set is given vent to anger between the house steward.
Described dehumidifying capillary 20 is arranged on the pipeline that connects indoor heat exchanger bringing-up section 14a outlet and indoor heat exchanger dehumidifying section 14b inlet, and is connected in parallel with the above-mentioned first dehumidifying magnetic valve 18 and the second dehumidifying magnetic valve 19 respectively.
One cold-producing medium knockout 13 is set in the pipeline before outdoor refrigerant enters indoor heat exchanger 14, is used for the cold-producing medium of coming in the air-conditioning system outside is split into multichannel, send into the dehumidifying section 14b and the indoor heat exchanger bringing-up section 14a of indoor heat exchanger respectively.
Also be provided with three separatory threeways in the refrigeration pipe of above-mentioned indoor, wherein the first separatory threeway 15 is used for the synthetic loop of two return line of indoor heat exchanger bringing-up section 14a; The second separatory threeway 16 is used for a synthetic loop is divided into two pipelines again, and a pipeline is connected with the first dehumidifying magnetic valve 18, and another pipeline is connected with dehumidifying capillary 20; The 3rd separatory threeway 17 is used for will entering coming from cold-producing medium knockout 13 cold-producing medium of indoor heat exchanger dehumidifying section 14b, perhaps is divided into two the tunnel and sends into an indoor heat exchanger dehumidifying section 14b from come cold-producing medium through 20 throttlings of dehumidifying capillary of indoor heat exchanger bringing-up section 14a.
The described first dehumidifying magnetic valve 18 and the second dehumidifying magnetic valve 19 are open type heavy caliber magnetic valve, and when air-conditioner was in the dehumidifying operation mode, energising was closed, and cold-producing medium this moment can only be by dehumidifying capillary 20; When air-conditioner is in refrigeration and heats operation mode, outage, the first dehumidifying magnetic valve 18 and the second dehumidifying magnetic valve 19 are opened, but cold-producing medium non-resistance basically passes through two dehumidifying magnetic valves, the pressure loss can be ignored, the capillary 20 that dehumidifies this moment is inoperative, does not influence normal refrigeration and heating effect, and the throttling step-down of this moment and the Flow-rate adjustment of cold-producing medium are finished by outdoor electric expansion valve 11.
The motor of described outdoor fan 12 adopts the alternating current generator with 2 grades of wind speed.
When air-conditioner was in described dehumidifying operation mode, the operating frequency of outdoor compressor 8 was to carry out fuzzy control according to indoor current humidity (being detected by the indoor humidity sensor that is positioned in the air-conditioner) and the difference of setting humidity (by the setting of controllers such as remote controller).
Describe the operational mode of this air-conditioner system in detail below in conjunction with accompanying drawing 2:
When system moves the healthy dehumidification pattern:
This moment off-premises station electric expansion valve 11 standard-sized sheets; the indoor set first dehumidifying magnetic valve 18 and the second dehumidifying magnetic valve 19 are all switched on closed; stop when opening during outdoor fan motor 12; to adjust the heat dissipation capacity of outdoor heat exchanger 10; and then the leaving air temp of adjustment indoor set heat exchanger 14, as prior art as can be known, the downtime of outdoor fan 12 is long more; the heat dissipation capacity of outdoor heat exchanger 10 is more little, and the leaving air temp of indoor heat exchanger 14 is just high more.
Cold-producing medium will pass through following state variation (among the figure in the direction of arrow agent's room in the machine heat exchanger system refrigerant flow direction) in the indoor set heat exchanger:
The gaseous refrigerant of the HTHP that i compressor 8 is discharged, inlet chamber external heat exchanger 10, be condensed into the liquid of HTHP, the outdoor electric expansion valve 11 of flowing through again, because this moment, outdoor electric expansion valve 11 was full-gears, so the liquid refrigerant of HTHP flows directly into indoor heat exchanger 14, again because the second dehumidifying magnetic valve, 19 energisings this moment are closed, cold-producing medium can only enter indoor heat exchanger bringing-up section 14a, when cold-producing medium is flowed through indoor heat exchanger bringing-up section 14a, cooled off by air, this moment, indoor heat exchanger bringing-up section 14a played the effect of condenser.The room air temperature of indoor set heat exchanger 14 of flowing through in this course raises, water capacity remain unchanged substantially (or slightly raising).
Ii is from the liquid refrigerant of the two-way HTHP of indoor heat exchanger bringing-up section 14a outflow, by the first separatory threeway 15 synthetic a tunnel, the second separatory threeway 16 is divided into two-way with this road cold-producing medium again, one tunnel and the first dehumidifying magnetic valve, 18 UNICOMs, dehumidifying capillary 20 is inserted on another road, magnetic valve 18 closures because dehumidify this moment first, cold-producing medium can only be by dehumidifying capillary 20, the throttling step-down becomes the gas-liquid mixed attitude of low-temp low-pressure, be divided into two-way by the 3rd separatory threeway 17 and enter indoor heat exchanger dehumidifying section 14b, evaporation therein absorbs the heat of the space air of the heat exchanger of flowing through, and since this moment system in cold-producing medium be in saturated mode, its saturation temperature is lower than the dew-point temperature of space air, and water will be separated out from air with liquid form, and indoor heat exchanger dehumidifying this moment section 14b plays the effect of evaporimeter.The room air temperature of the indoor heat exchanger of flowing through in this course dehumidifying section 14b descends, and water capacity reduces.Dehumidification function was realized in this stage.
The flow through space air of indoor heat exchanger bringing-up section 14a and the space air of the indoor heat exchanger dehumidifying section 14b that flows through of iii mixes in the air-conditioned wind tunnel system, is admitted to the room by air outlet.This process has just guaranteed that leaving air temp approaches the environment temperature in room.
Above-mentioned adjustment process to space air has just realized the healthy dehumidification function of air-conditioner.
During system running refrigerating pattern:
Off-premises station electric expansion valve 11 work this moment, play the effect of throttling step-down, the indoor set first dehumidifying magnetic valve 18 and the second dehumidifying magnetic valve 19 all cut off the power supply and open, because the circulation bore of this valve is bigger, the flow through pressure loss of this valve of cold-producing medium can be ignored, form path in system, dehumidifying capillary 20 is inoperative.
The gaseous refrigerant of the HTHP that compressor 8 is discharged, 10 condensations of inlet chamber external heat exchanger, again by outdoor electric expansion valve 11 throttlings, cold-producing medium knockout 13 will be split into three the tunnel through the gas-liquid mixed attitude cold-producing medium of the low-temp low-pressure of outdoor electric expansion valve 11 throttlings by what came in the outside, two-way flows into indoor heat exchanger bringing-up section 14a, one the tunnel leads to the second dehumidifying magnetic valve 19, through the 3rd separatory threeway 17 cold-producing medium is divided into two the tunnel again, enter indoor heat exchanger dehumidifying section 14b, gaseous refrigerant after the evaporation divides two-way to come out respectively by the top of indoor heat exchanger bringing-up section 14a and indoor heat exchanger dehumidifying section 14b, total muffler of inlet chamber inboard.This process, whole indoor heat exchanger 14 all plays the effect of evaporimeter.
Because cold-producing medium is divided into four tunnel turnover indoor heat exchangers 14, it is long-pending by the fluid cross-section of tubulation to be equivalent to increase cold-producing medium, shortened the length of pipe group tubulation, the flow of cold-producing medium is suitably increased, speeding up of evaporation or condensation, the equilibrium that also helps cold-producing medium is flowed, and improves the heat exchange efficiency of system greatly, also can reduce simultaneously the flow velocity of cold-producing medium in pipeline, thereby reduce the mobile sound of cold-producing medium on pipeline.
Ratio by reasonable distribution indoor heat exchanger bringing-up section 14a and indoor heat exchanger dehumidifying section 14b, and, can realize the purpose of air-conditioner cool-down dehumidification, constant temperature dehumidification or the dehumidifying that heats up to the outdoor electric expansion valve in the refrigeration system 11, the first dehumidifying magnetic valve 18 and the second dehumidifying magnetic valve 19, dehumidifying capillary 20, the start-stop control of outdoor fan 12 and the Based Intelligent Control of compressor 8 operating frequencys.
As mentioned above, given in conjunction with the accompanying drawings and embodiments scheme content can derive the similar techniques scheme.In every case be the content that does not break away from technical solution of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical solution of the present invention according to technical spirit of the present invention.
Claims (4)
1, a kind of healthy dehumidification type air conditioner comprises compressor (8), electromagnetism four-way change-over valve (9), outdoor heat exchanger (10), outdoor electric expansion valve (11), outdoor fan (12), indoor heat exchanger (14), dehumidifying capillary (20);
Described indoor heat exchanger (14) has been divided into two parts, and when the dehumidifying operation mode, wherein a part is indoor heat exchanger bringing-up section (14a), and another part is an indoor heat exchanger dehumidifying section (14b);
It is characterized in that: cold-producing medium is divided into four the tunnel and passes in and out described air-conditioner indoor heat exchanger (14), and wherein two-way passes in and out indoor heat exchanger bringing-up section (14a), two-way turnover indoor heat exchanger dehumidifying section (14b);
Dehumidifying capillary (20) is arranged on the pipeline that connects between indoor heat exchanger bringing-up section (14a) outlet and indoor heat exchanger dehumidifying section (14b) inlet;
Described air-conditioning system also comprises a cold-producing medium knockout (13), is arranged in outdoor refrigerant and enters indoor heat exchanger (14) indoor pipeline before;
First magnetic valve (18) that dehumidifies on giving vent to anger pipeline between the house steward, indoor heat exchanger bringing-up section (14a) outlet and indoor set is set;
The second dehumidifying magnetic valve (19) is set on the pipeline between described cold-producing medium knockout (13) and indoor heat exchanger dehumidifying section (14b) inlet.
2, healthy dehumidification type air conditioner according to claim 1 is characterized in that: the described first dehumidifying magnetic valve (18) and the second dehumidifying magnetic valve (19) are open type heavy caliber magnetic valve.
3, healthy dehumidification type air conditioner according to claim 1 is characterized in that: the motor of described outdoor fan (12) adopts the alternating current generator with 2 grades of wind speed.
4, according to each described healthy dehumidification type air conditioner of claim 1 to 3, it is characterized in that: also be provided with the first separatory threeway (15), the second separatory threeway (16) in the described air-conditioning system, reach the 3rd separatory threeway (17), the wherein said first separatory threeway (15) is arranged on the outlet of indoor heat exchanger bringing-up section (14a), is used for the two-way cold-producing medium synthetic a tunnel that described indoor heat exchanger bringing-up section (14a) is come out;
The described second separatory threeway (16) is used for the road cold-producing medium that the described first separatory threeway (15) is synthetic and is divided into two-way again, and wherein a way outlet links to each other with the described first dehumidifying magnetic valve (18), and another way outlet links to each other with described dehumidifying capillary (20);
Described the 3rd separatory threeway (17) is arranged on the pipeline between the inlet of described second dehumidifying magnetic valve (19) and the indoor heat exchanger dehumidifying section (14b), is used for will entering coming from described cold-producing medium knockout (13) cold-producing medium of indoor heat exchanger dehumidifying section (14b) or is divided into two the tunnel and enters described indoor heat exchanger dehumidifying section (14b) from come cold-producing medium through described dehumidifying capillary (20) throttling of indoor heat exchanger bringing-up section (14a).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101270272A CN100504196C (en) | 2006-09-21 | 2006-09-21 | Healthy dehumidification type air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101270272A CN100504196C (en) | 2006-09-21 | 2006-09-21 | Healthy dehumidification type air conditioner |
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| CN101149169A CN101149169A (en) | 2008-03-26 |
| CN100504196C true CN100504196C (en) | 2009-06-24 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635904B (en) * | 2012-04-23 | 2014-05-28 | 西安建筑科技大学 | Dual-circulation fresh air dehumidifying and coil cooling type air conditioning unit |
| CN103062851B (en) * | 2013-01-07 | 2015-12-09 | 青岛海信日立空调系统有限公司 | Air-conditioning system and dehumanization method thereof |
| CN103968619B (en) * | 2013-01-31 | 2016-08-10 | 广东美的制冷设备有限公司 | There is the air-conditioner of rapid moisture removal |
| CN103411341B (en) * | 2013-09-02 | 2016-03-23 | 海信（山东）空调有限公司 | Type constant temperature dehumidifying air conditioner and dehumanization method |
| CN104896637A (en) * | 2015-05-30 | 2015-09-09 | 华为技术有限公司 | Light-load dehumidification and refrigeration method and device |
| CN107305074B (en) * | 2016-04-18 | 2020-01-17 | 青岛海尔空调电子有限公司 | Temperature and humidity independent control air conditioning system |
| CN108931068A (en) * | 2017-05-23 | 2018-12-04 | 浙江三花智能控制股份有限公司 | Air-conditioning system, heating dehumanization method, heating method and refrigerating method |
| CN108758960B (en) * | 2018-03-21 | 2020-02-04 | 青岛海信日立空调系统有限公司 | Time-sharing dehumidification method and device for multi-split air conditioning system and computer storage medium |
| CN112628849A (en) * | 2020-12-18 | 2021-04-09 | 珠海格力电器股份有限公司 | Temperature and humidity regulation and control assembly, temperature and humidity regulation and control method thereof and air conditioning system |
| CN114294798B (en) * | 2021-11-26 | 2023-06-02 | 珠海格力电器股份有限公司 | Constant-temperature dehumidification control method of air conditioner and air conditioner |
| CN114353198A (en) * | 2021-12-15 | 2022-04-15 | 广州万居隆电器有限公司 | Dehumidification system with temperature-adjusting fresh air dehumidifier and control method thereof |
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2006
- 2006-09-21 CN CNB2006101270272A patent/CN100504196C/en active Active
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