CN101382364B - Defrosting method for low temperature dehumidifier - Google Patents
Defrosting method for low temperature dehumidifier Download PDFInfo
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- CN101382364B CN101382364B CN2007100595271A CN200710059527A CN101382364B CN 101382364 B CN101382364 B CN 101382364B CN 2007100595271 A CN2007100595271 A CN 2007100595271A CN 200710059527 A CN200710059527 A CN 200710059527A CN 101382364 B CN101382364 B CN 101382364B
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- temperature
- defrosting
- compressor
- fan
- dehumidifier
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- 238000010257 thawing Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003507 refrigerant Substances 0.000 abstract description 22
- 238000007791 dehumidification Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 201000004792 malaria Diseases 0.000 description 1
- 238000005373 pervaporation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The invention relates to a defrosting technology of a dehumidifier, in particular to a defrosting method of a low-temperature dehumidifier which stops a compressor and increases the wind volume of a fan. The defrosting method can solve the problems that a direction changing valve is currently used for changing the direction of a circulating refrigerant for defrosting, while the direction changingvalve is expensive and easily damaged. The technical proposal is as follows: the compressor is started and the fan is operated under the set wind volume, then the dehumidification is operated for a period of time and the temperature of an exhaust pipe of the evaporator is simultaneously judged, if the temperature thereof is higher than the defrosting inrush temperature, the dehumidification is continuously carried out, and if the temperature is not higher than the defrosting inrush temperature, the compressor is closed, the wind volume of the fan is increased, and the defrosting is started; the temperature of the exhaust pipe of the evaporator is simultaneously judged, when the temperature is higher than the defrosting release temperature, the dehumidification state is returned, if the temperature is still not higher than the defrosting release temperature, the defrosting is continuously carried out till the temperature is higher than the defrosting release temperature under the situations that the compressor is closed and the wind volume of the fan is increased, and then the dehumidification state is returned. The defrosting method reduces the cost of the dehumidifier and save the electricity charge due to the elimination of the direction changing valve.
Description
Technical field
The present invention relates to the Defrost technology of dehumidifier, particularly a kind of compressor that stops to add the low wet type Defrost Control of Air-cooling Dehumidifier method that speed motor moves.
Background technology
In general, after dehumidifier is incorporated into the inside of casing with indoor malaria, make its heat exchanger that evaporimeter and condenser constituted by the internal flow refrigerant reduce humidity, the air that will reduce humidity again is expelled back into indoor again.
Fig. 1 is the exploded perspective view of the general dehumidifier of conventional art.
As shown in Figure 1, the dehumidifier structure of conventional art includes: be installed on the chassis, the compressor 1 of compression refrigerant; Be connected in the outlet of compressor, will be by the condenser 2 of refrigerant after the compressor compresses and surrounding air heat exchange; Be connected in the outlet of condenser, the expansion valve (not shown) of refrigerant of device condensation of being condensed expands; Be connected in the outlet of expansion valve, make refrigerant evaporation that expands by expansion valve and the evaporimeter 3 that carries out heat exchange with sky, be arranged at the condenser left side, promote the fan 4 that condenser 2 and evaporimeter 3 carry out heat exchange; Above-mentioned compressor 1, condenser 2, evaporimeter 3, fan 4 are arranged side by side the casing 5 of portion within it.
Casing 5 is made of front casing 5a, back casing 5b and chassis 5c.Dehumidified that air entry 6 that the air in room go up to form by back casing 5b flows into after pervaporation device 3 and condenser 2 flow back to the room by fan 4 by the exhaust outlet 7 of front casing 5a more again here.
The course of work that possesses the dehumidifier of structure as mentioned above is as follows: start back compressor and fan motor runs, compressor with low temperature, low pressure gaseous coolant boil down to high temperature, high-pressure gaseous refrigerant and transport to condenser and the surrounding air heat exchange after become middle temperature, high-pressure liquid refrigerant, transport to again become low temperature after expansion valve expands, the low-pressure liquid refrigerant is transported to evaporimeter again, refrigerant evaporation with liquid state in evaporimeter is the gaseous coolant of low temperature, low pressure, and absorbs heat from ambient air.Therefore along with the evaporation of refrigerant, the temperature of evaporimeter will descend, and be carried by fan and the temperature of the air by evaporimeter also will descend.
Along with the decline of evaporimeter environment temperature, moisture contained in the air is condensation, and falls in the downside drip tray for behind the water droplet in the evaporator surface cohesion.The condensed water that gathers in drip tray will flow out and be contained in and be installed in the steel ladle 8 that can take out the casing bottom from apopore, after bucket takes out condensed water be fallen in outdoor to reach the purpose of indoor dehumidification.
General dehumidifier operating ambient temperature is 18--32 ℃, and when environment temperature is lower than 18 ℃, unit then because of the evaporator surface temperature near or equal 0 ℃ of frosting, the result reduces evaporimeter heat exchange effect and effect on moisture extraction even can't move, more present traditional Defrost methods, commonly used has following four kinds:
1, shuts down defrosting.Promptly stop refrigeration system operation (close compressor), keep the fan operation, to evaporator defrost, shortcoming is that defrosting time is longer by air.
2, electrical heating defrosting.By stopping refrigeration system operation, energising is heated a period of time and is defrosted to the electric heating tube evaporimeter under, and shortcoming is the cost height, additionally increases power consumption.
3, refrigerant bypass defrost.Promptly by magnetic valve the part of HTHP refrigerant is directly introduced evaporimeter a period of time and defrost, shortcoming is that evaporimeter heat exchange effect is reduced.
4, reverse cycle defrost, as shown in phantom in Figure 2, promptly change refrigerant loop direction in the dehumidifier with reversal valve 10, compressor 1 is compressed the high temperature, the high pressure refrigerant that directly to be transported to 3 a period of times of evaporimeter and defrosts, refrigerant behind evaporator defrost returns compressor 1 through expansion valve 9, condenser 2 again, shortcoming is that the evaporimeter heat exchange efficiency is reduced, and magnetic valve damages easily.
Summary of the invention
The present invention discloses a kind of defrosting method for low temperature dehumidifier for the problems referred to above that solve the prior art existence; it belongs to the category of shutting down defrosting; be a kind of by stopping compressor; stop refrigeration system operation defrosting; its structure as shown in Figure 3; the refrigerant circulation is as the direction of arrow; be that compressor 1 compresses the high temperature that; the high pressure refrigerant is transported to condenser 2; again through expansion valve 9; evaporimeter 3 returns compressor 1; but it is a defrosting method for low temperature dehumidifier of having accelerated the fan electromotor operation in the defrosting running; this method is: during defrosting; stop compressor operation and strengthen air quantity of fan; flow to the defrosting method for low temperature dehumidifier of evaporator defrost by air; it is characterized in that: open at compressor; fan is for setting under the air quantity; dehumidifying running a period of time; simultaneously evaporimeter comb temperature is judged; if its temperature＞when temperature would be charged in defrosting; then proceed dehumidifying; if its temperature≤when temperature would be charged in defrosting; compressor cuts out; fan strengthens air quantity and begins defrosting; defrosting is judged evaporimeter comb temperature simultaneously; when removing temperature, its temperature recovery＞defrosting then returns except that wet condition; if its temperature still≤defrosting removes temperature then closes at compressor, fan strengthens air quantity to be continued defrosting pressure when temperature is removed in evaporimeter comb temperature＞defrosting down and returns except that wet condition.
Advantage and good effect: defrosting method for low temperature dehumidifier of the present invention is owing to adopted shutdown (close compressor) Defrost method; so need in dehumidifier, increase the electric heating equipment that cost is risen unlike the electrical heating defrosting; also need increase magnetic valve, the reversal valve of easy damage and unstable properties unlike refrigerant bypass or reverse cycle defrost; therefore power saving, cost are low; simple in structure; the low temperature defrosting is reliable and stable, and defrosting effect is good.
Description of drawings
Fig. 1 is the dehumidifier exploded perspective view of conventional art;
Fig. 2 when utilizing reversal valve with the refrigerant reverse cycle defrost, dehumidifier medium circulation pipeline figure;
Fig. 3 for defrosting method for low temperature dehumidifier of the present invention the time, dehumidifier medium circulation pipeline figure;
Fig. 4 is the embodiment flow chart when utilizing reversal valve with the refrigerant reverse cycle defrost;
Fig. 5 is the flow chart that defrosts of the embodiment when utilizing defrosting method for low temperature dehumidifier of the present invention;
Fig. 6 when utilizing reversal valve with the refrigerant reverse cycle defrost, its compressor, fan open and close, reversal valve state and defrosting temperature～time plot;
Fig. 7 is compressor, fan open and close state and Defrost Control of Air-cooling Dehumidifier temperature～time plot in the defrosting method for low temperature dehumidifier of the present invention.
Critical piece label detail among each figure
1-compressor 2-condenser
3-evaporimeter 4-fan
5-casing 6-air entry
7-exhaust outlet 8-steel ladle
9-expansion valve 10-reversal valve
The specific embodiment
For further specify content of the present invention, technical scheme, to lift following example and accompanying drawings as follows:
As Fig. 3,5, shown in 7, defrosting method for low temperature dehumidifier of the present invention is to utilize dehumidifier evaporimeter comb temperature-sensitive head temperature-sensitive signal to transport to dehumidifier middle controller (not shown) in dehumidifier medium circulation pipeline shown in Figure 3, open by controller control, close compressor operation and regulate air quantity of fan, be to flow to the defrosting method for low temperature dehumidifier of evaporator defrost by air, as Fig. 5, in the example shown in 7, it is to open at compressor, fan is for setting the running 20 minutes that dehumidifies under the air quantity, simultaneously evaporimeter comb temperature is judged, if during its temperature＞1 ℃ then proceed dehumidifying, if during its temperature＜1 ℃ then compressor cuts out, fan strengthens air quantity to begin to defrost 8 minutes, simultaneously evaporimeter comb temperature is judged, if during its temperature＞3 ℃ then return except that wet condition, if during its temperature＜3 ℃ then close at compressor, fan strengthens air quantity to be continued down to return except that wet condition after 30 seconds of defrosting.
Claims (1)
1. defrosting method for low temperature dehumidifier, it is the Defrost method that stops compressor operation and strengthen air quantity of fan, it is characterized in that: open at compressor, fan is for setting under the air quantity, dehumidifying running a period of time is judged evaporimeter comb temperature simultaneously, if its temperature＞when temperature would be charged in defrosting, then proceed dehumidifying, if its temperature≤when temperature would be charged in defrosting, compressor cuts out, fan strengthens air quantity and begins defrosting, defrosting is judged evaporimeter comb temperature simultaneously, when its temperature＞defrosting is removed temperature, then return except that wet condition, if its temperature still≤when temperature is removed in defrosting then close at compressor, fan strengthens air quantity to be continued defrosting down and returns except that wet condition when evaporimeter comb temperature＞defrosting releasing temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100595271A CN101382364B (en) | 2007-09-07 | 2007-09-07 | Defrosting method for low temperature dehumidifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100595271A CN101382364B (en) | 2007-09-07 | 2007-09-07 | Defrosting method for low temperature dehumidifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101382364A CN101382364A (en) | 2009-03-11 |
| CN101382364B true CN101382364B (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100595271A Expired - Fee Related CN101382364B (en) | 2007-09-07 | 2007-09-07 | Defrosting method for low temperature dehumidifier |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013006424A2 (en) | 2011-07-01 | 2013-01-10 | Brooks Automation, Inc. | Systems and methods for warming a cryogenic heat exchanger array, for compact and efficient refrigeration, and for adaptive power management |
| CN104501353B (en) * | 2014-12-01 | 2017-06-06 | 广东美的制冷设备有限公司 | The control method and control device of dehumidifier and dehumidifier |
| CN105042786B (en) * | 2015-07-30 | 2018-09-11 | 广东美的制冷设备有限公司 | The control method and device of dehumidifier and dehumidifier |
| JP6607267B2 (en) * | 2018-01-23 | 2019-11-20 | ダイキン工業株式会社 | Air conditioner |
| KR20210026864A (en) * | 2019-09-02 | 2021-03-10 | 엘지전자 주식회사 | Under counter type refrigerator and a method controlling the same |
| CN113719923A (en) * | 2021-09-15 | 2021-11-30 | 伊岛电器(宁波)有限公司 | Dehumidifier with fan for defrosting |
| CN113719924A (en) * | 2021-09-15 | 2021-11-30 | 伊岛电器(宁波)有限公司 | Dehumidifier of high-efficient dehumidification |
| CN114777222A (en) * | 2022-04-25 | 2022-07-22 | 珠海格力电器股份有限公司 | Dehumidification system, control method and device thereof and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4291542A (en) * | 1977-01-19 | 1981-09-29 | A/S Dantherm | Air drying apparatus of the condensation type |
| CN1158965A (en) * | 1995-03-31 | 1997-09-10 | 三洋电机株式会社 | Dehumidifier |
| CN1904515A (en) * | 2005-07-29 | 2007-01-31 | 乐金电子(天津)电器有限公司 | Commercial use air conditioner |
-
2007
- 2007-09-07 CN CN2007100595271A patent/CN101382364B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4291542A (en) * | 1977-01-19 | 1981-09-29 | A/S Dantherm | Air drying apparatus of the condensation type |
| CN1158965A (en) * | 1995-03-31 | 1997-09-10 | 三洋电机株式会社 | Dehumidifier |
| CN1904515A (en) * | 2005-07-29 | 2007-01-31 | 乐金电子(天津)电器有限公司 | Commercial use air conditioner |
Non-Patent Citations (1)
| Title |
|---|
| JP昭62-94750A 1987.05.01 |
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| CN101382364A (en) | 2009-03-11 |
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Granted publication date: 20110511 Termination date: 20110907 |