CN103316568B - Combined type compressed air cryogenic dehumidifier - Google Patents
Combined type compressed air cryogenic dehumidifier Download PDFInfo
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- CN103316568B CN103316568B CN201310240692.2A CN201310240692A CN103316568B CN 103316568 B CN103316568 B CN 103316568B CN 201310240692 A CN201310240692 A CN 201310240692A CN 103316568 B CN103316568 B CN 103316568B
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Abstract
The application relates to the technical field of compressed air dehumidifiers and in particular relates to a combined type compressed air cryogenic dehumidifier comprising not less than two evaporators, wherein a condenser is arranged between any two adjacent evaporators; an air output end of the last evaporator along the conveying direction of compressed air is connected with not less than two frosting devices in parallel. The compressed air firstly passes through the staggered evaporators and condensers sequentially, is cooled to 2-4 DEG C to be condensed to remove partial water vapor by the evaporator, is heated to the normal temperature by the condenser, then enters the next evaporator to be condensed and dehumidified, and so forth. The compressed air is cooled, condensed and dehumidified repeatedly and can not be frosted by low temperature, the compressed air enters the frosting devices after being cooled, condensed and dehumidified by the last evaporator, the water vapor in the compressed air is frosted to release, and therefore, a dew point of the compressed air is further reduced and cryogenic dehumidification is realized.
Description
Technical field
The application relates to compressed air dehumidifier technical field, particularly a kind of combined compressed air deep cooling dehumidifier.
Background technology
Usually a large amount of saturated liquid state and vaporous water is contained at the compressed air of the industrial extensive use of pneumatic system.In order to prevent these liquid state and the normal work of vaporous water to pneumatic system from working the mischief, need to carry out dehumidifying with dry to compressed air.
The method dehumidified to compressed air is generally compressed air to lower the temperature and makes the liquid state in this compressed air and vaporous water produce condensation and be separated, thus reaches effect on moisture extraction.The such as patent No. be CN1120154A application discloses a kind of cooled compressed air dehumidification system and device thereof, it is via refrigerant pipe and compressor, a heat exchanger of duplex configuration structure, decompressor and evaporimeter circulation connect and compose freeze cycle, this evaporimeter be configured in there is air outlet slit and entrance secondary heat exchanger in, refrigerant pipe is connected with the outer tube of a heat exchanger, form the mode of the periphery flowing of cold-producing medium pipe in this heat exchanger, the interior pipe of the air outlet slit of above-mentioned secondary heat exchanger and a heat exchanger communicates, from the external air of Air Blast fan by the periphery of a heat exchanger of blowing.But, above-mentioned technology has only just carried out shallow cold dehumidifying to compressed gas source, namely compressed-air actuated dew point is only made to reach about 2 ~ 4 DEG C, do not carry out deep-freezing dehumidifying, low dew-point temperature steam can not be realized to compressed air to remove, make depoint depression to about-25 DEG C, therefore above technology is difficult to be suitable in the higher commercial Application of requirement.
Certainly, present stage also has the technical method of employing frosting to realize the object that dehumidifies, it is generally be warming up to normal temperature after compression stroke is carried out condensation dehumidifying to carry out frosting dehumidifying again, condensation dehumidifies and frosting dehumidifies relatively independent, and existing this technology exists following multiple problem: (1) condensation dehumidifies and frosting dehumidifies, and the relatively independent efficiency that causes is low; (2) condensation dehumidifying and frosting dehumidifying adopt independently coolant circulating system respectively, and need to configure the equipment such as compressor respectively, cost is high, and efficiency is low; (3) the condensation dehumidifying stage fails effectively to remove the liquid state in compressed air and vaporous water, and when causing frosting to dehumidify, frosting degree is large, because in frosting dehumidification process, the coefficient of heat transfer is low, therefore not only affect overall effect on moisture extraction, and efficiency is low; (4) because frost layer can not white-out automatically, just need to carry out defrosting operation after a period of time that therefore often works, automaticity is low, inefficiency.
Therefore, for solving weak point of the prior art, provide that a kind of efficiency is high, energy consumption is low, cost is low, effect on moisture extraction is good and that the combined compressed air deep cooling dehumidifier that automaticity is high seems is particularly necessary.
Summary of the invention
The object of the application is to avoid above-mentioned weak point of the prior art and provides that a kind of efficiency is high, energy consumption is low, cost is low, effect on moisture extraction is good and the combined compressed air deep cooling dehumidifier that automaticity is high.
The object of the application is achieved through the following technical solutions:
Provide a kind of combined compressed air deep cooling dehumidifier, comprise the evaporimeter being no less than two, condenser is provided with between two evaporimeters of arbitrary neighborhood, air output along last evaporimeter of compressed air direction of transfer setting is parallel with the frosting device being no less than two, described frosting device has at least one to be in frosting state, remainder is all in defrost state, and compressed air to be dehumidified flows through in staggered evaporimeter and flows to the frosting device being in frosting state after condenser to last evaporimeter;
Also comprise compressor and fluid reservoir, the output of described compressor is connected with the refrigerant inlet of described condenser, the refrigerant exit of condenser is connected with the input of described fluid reservoir, the output of described fluid reservoir is connected with the refrigerant inlet of evaporimeter through first throttle valve on the one hand, be connected through the refrigerant inlet of second throttle with frosting device on the other hand, the refrigerant exit of described evaporimeter is connected with the input of compressor respectively with the refrigerant exit of described frosting device.
Wherein, each frosting device is provided with photoelectric detection switch, and described photoelectric detection switch detects frost thickness in frosting device in real time, closes the compressed air input of frosting device and open defrosting operation when frost thickness is greater than preset value.
Wherein, the operating temperature of described evaporimeter is 2 DEG C ~ 4 DEG C, and the operating temperature of described frosting device is not less than-25 DEG C.
Wherein, the below of described evaporimeter is provided with drips dew collector, and described dew collector is provided with drain valve.
Wherein, described evaporimeter is finned-tube evaporator, described condenser is fin tube condenser, and refrigerant works in the tube side of described finned-tube evaporator and fin tube condenser, and compressed air to be dehumidified plunders finned-tube evaporator and fin tube condenser so that the form of cross-flow is horizontal.
Wherein, it is curved that the tube side of described finned-tube evaporator and fin tube condenser presents Curved Continuous, the fin of the multiple screw-type of outer setting of described finned-tube evaporator and fin tube condenser, zigzag, folding fan-shaped or show window shape.
Wherein, described frosting device quantity is two, and the output of described second throttle is connected with triple valve, and two outputs of described triple valve are connected with the refrigerant inlet of two frosting devices respectively.
Wherein, the refrigerant exit of described evaporimeter is connected with heat exchanger, and described heat exchanger is shell-and-tube heat exchanger, double pipe heat exchanger or plate type heat exchanger.
The beneficial effect of the application: a kind of combined compressed air deep cooling dehumidifier is provided, compressed air is first successively by staggered evaporimeter and condenser, 2 DEG C ~ 4 DEG C condensation remove portion steam are cooled to by evaporimeter, then normal temperature is warmed to by condenser, and then enter the dehumidifying of next evaporator condensation, so repeatedly, compressed air repeatedly lower the temperature condensation dehumidifying and don't cause frosting as temperature is too low, at compressed air after the dehumidifying of last evaporimeter cooling condensation, compressed air enters frosting device, frosting device makes the steam frosting in compressed air disengage, further reduction compressed air dew point, realize deep cooling dehumidifying.Compared with prior art: the application has the following advantages: the dehumidifying of (1) condensation is together with frosting dehumidifying organic unity, the frosting dehumidifying stage is directly entered after in the end evaporimeter cooling condensation dehumidifying, cut down the number of intermediate links, improve the overall efficiency of dehumidifier; (2) condensation dehumidifying and frosting dehumidifying adopt same coolant circulating system, only need a compressor, have effectively saved cost, reduced energy consumption; (3) because the condensation dehumidifying stage adopts multi-layer condensation dehumidifying repeatedly, make the condensation dehumidifying stage most of steam effectively removed in compressed air decrease the frosting degree in frosting dehumidifying stage, namely decrease defrosting workload, also improve the effect of dehumidifying; (4) multiple frosting device alternation; part is in frosting state; part is in defrost state; then original place is become frosting state in the frosting device of defrost state after reaching certain thickness Deng the frosting device frost layer of frosting state; thus ensure dehumidifier to work long hours continuously and defrost without the need to shutting down; improve the automaticity of dehumidifier, improve its operating efficiency further.
Accompanying drawing explanation
Utilize accompanying drawing to be described further the application, but the embodiment in accompanying drawing does not form any restriction to the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Fig. 1 is the structural representation of the embodiment of a kind of combined compressed air deep cooling of the application dehumidifier.
Fig. 2 is the structural representation of the coolant circulating system of the embodiment of a kind of combined compressed air deep cooling of the application dehumidifier.
Include in fig. 1 and 2:
1---evaporimeter, 2---condenser, 3---frosting device, 4---compressor, 5---fluid reservoir, 6---first throttle valve, 7---second throttle, 8---triple valve.
In Fig. 1, flow path hollow core arrow direction is compressed air flow direction, and filled arrows direction is refrigerant flow direction.
Detailed description of the invention
With the following Examples the application is further described.
The detailed description of the invention of a kind of combined compressed air deep cooling of the application dehumidifier, as depicted in figs. 1 and 2, comprise: in multiple evaporimeter 1(figure, only show three, in fact more quantity can be had, specifically can adjust according to physical condition), condenser 2 is provided with between two evaporimeters 1 of arbitrary neighborhood, air output along last evaporimeter 1 of compressed air direction of transfer setting is parallel with the frosting device 3 of two, described frosting device 3 has one to be in frosting state, another is in defrost state, compressed air to be dehumidified flows to the frosting device 3 being in frosting state after flowing through staggered evaporimeter 1 and condenser 2 to last evaporimeter 1, the operating temperature of described evaporimeter 1 is 2 DEG C ~ 4 DEG C, and the operating temperature of described frosting device 3 is not less than-25 DEG C.
This combined compressed air deep cooling dehumidifier also comprises compressor 4 and fluid reservoir 5, the output of described compressor 4 is connected with the refrigerant inlet of described condenser 2, the refrigerant exit of condenser 2 is connected with the input of described fluid reservoir 5, the output of described fluid reservoir 5 is connected through the refrigerant inlet of first throttle valve 6 with evaporimeter 1 on the one hand, on the other hand successively through second throttle 7, be connected with the refrigerant inlet of frosting device 3 after triple valve 8, two outputs of described triple valve 8 are connected with the refrigerant inlet of two frosting devices 3 respectively, the refrigerant exit of described evaporimeter 1 is connected with the input of compressor 4 respectively with the refrigerant exit of described frosting device 3, coolant circulating system is formed with this.
In dehumidifying work, compressed air is first successively by staggered evaporimeter 1 and condenser 2, 2 ~ 4 DEG C are cooled to by evaporimeter 1, temperature is lower than compressed air dew point, compressed air generation condensation remove portion steam, then leave chill surface and enter condenser 2, normal temperature is warmed to by condenser 2, and then enter the dehumidifying of next evaporimeter 1 condensation, so repeatedly, make to keep the higher coefficient of heat transfer between compressed air and evaporimeter 1 on the one hand, improve heat exchange efficiency and efficiency, have by sufficient cool-down dehumidification and don't can cause compressed air frosting because of excessive drop temperature in the guarantee dew dehumidifying stage on the other hand.Therefore, after condensation dehumidifying, the steam of compressed air 95% is removed, and water content of compressed air is down to 0.563 g/kg from 20.356 g/kg.Dew point is effectively down to 3 ~ 4 DEG C by normal temperature 25 DEG C.
At compressed air after condensation dehumidifying lowered the temperature by last evaporimeter 1, compressed air directly enters frosting device 3, frosting device 3 one is in frosting state, and another is in defrost state, and compressed air enters the frosting device 3 being in frosting state, frosting device 3 makes compressed-air actuated temperature be down to-25 DEG C, steam frosting in compressed air disengages, and reduces compressed air dew point further, makes its dew point arrive-25 ° of C, water content reaches 0.044g/kg, realizes deep cooling dehumidifying.In addition, two frosting devices 3 are used alternatingly, one is in frosting state, another one is in defrost state, when frosting device 3 frost thickness being in frosting state acquires a certain degree, then close this frosting device 3 and make it enter defrost state, open another frosting device 3 simultaneously and make it become frosting state from defrost state.
In addition, in coolant circulating system, the spirit medium boil down to high-pressure gaseous that evaporimeter 1 and frosting device 3 export by compressor 4, and the refrigerant of this high-pressure gaseous is sent to condenser 2, in condenser 2, release heat is condensed into the refrigerant of low temperature liquid and is stored in fluid reservoir 5, fluid reservoir 5 sends the refrigerant of low temperature liquid to evaporimeter 1 and frosting device 3 by choke valve, make refrigerant evaporation endothermic in evaporimeter 1 and frosting device 3, realize cooling object, refrigerant is converted into high-temperature low-pressure gaseous state, then be delivered in compressor 4 and again compress, realize circulation.
Compared with prior art: the application has the following advantages: the dehumidifying of (1) condensation is together with frosting dehumidifying organic unity, in the end evaporimeter 1 is lowered the temperature after condensation dehumidifying and is directly entered the frosting dehumidifying stage, cut down the number of intermediate links, improve the overall efficiency of dehumidifier; (2) condensation dehumidifying and frosting dehumidifying adopt same coolant circulating system, only need a compressor 4, have effectively saved cost, reduced energy consumption; (3) because the condensation dehumidifying stage adopts multi-layer condensation dehumidifying repeatedly, the condensation dehumidifying stage most of steam effectively removed in compressed air is made to decrease the frosting degree in frosting dehumidifying stage, namely defrosting workload is decreased, also improve the effect of dehumidifying, and due to coefficient of heat transfer during frosting low, reduce frosting degree also effectively can improve system energy efficiency; (4) two frosting device 3 alternations; one is in frosting state; another is in defrost state; then original place is become frosting state in the frosting device 3 of defrost state after reaching certain thickness Deng frosting device 3 frost layer of frosting state; thus ensure dehumidifier to work long hours continuously and defrost without the need to shutting down; improve the automaticity of dehumidifier, improve its operating efficiency further.
Need remark additionally, in the present embodiment, the quantity of frosting device 3 can more than two, and principal security has at least a part to be in frosting state, and another part is in defrost state; In addition, the operating temperature of frosting device 3 can adopt other temperature lower than 0 DEG C, specifically can change according to required compressed-air actuated dewpoint requirements, simultaneously due at the most of steam of condensation dehumidifying stage existing effect removing, therefore can-40 DEG C be down in the operating temperature of the frosting device 3 of the technical scheme of the application.
Each frosting device 3 is provided with photoelectric detection switch, and described photoelectric detection switch detects frost thickness in frosting device 3 in real time, closes the compressed air input of frosting device 3 and open defrosting operation when frost thickness is greater than preset value.Adopt photoelectric detection switch to rotate and detect frost thickness, thus realize two frosting devices 3 and to automatically switch frosting/defrost state, further increase the automaticity of dehumidifier,
The below of described evaporimeter 1 is provided with drips dew collector, and described dew collector is provided with drain valve.Steam drops in dew collector after generation condensation received by evaporimeter 1, drips the timing of dew collector and opens drain valve draining, avoids the inner ponding of dehumidifier.
Described evaporimeter 1 is finned-tube evaporator 1, described condenser 2 is fin tube condenser 2, refrigerant works in the tube side of described finned-tube evaporator 1 and fin tube condenser 2, and compressed air to be dehumidified plunders finned-tube evaporator 1 and fin tube condenser 2 so that the form of cross-flow is horizontal; It is curved that the tube side of described finned-tube evaporator 1 and fin tube condenser 2 presents Curved Continuous, the fin of the multiple screw-type of outer setting of described finned-tube evaporator and fin tube condenser, zigzag, folding fan-shaped or show window shape.Effectively improve the heat exchange efficiency of evaporimeter 1 and condenser 2 with this, improve the overall efficiency of dehumidifier.
The refrigerant exit of described evaporimeter 1 is connected with heat exchanger, and described heat exchanger is shell-and-tube heat exchanger, double pipe heat exchanger or plate type heat exchanger, balances the cold and hot amount of coolant circulating system with this.
Finally should be noted that; above embodiment is only in order to illustrate the technical scheme of the application; but not the restriction to the application's protection domain; although done to explain to the application with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical scheme of the application or equivalent replacement, and not depart from essence and the scope of technical scheme.
Claims (9)
1. a combined compressed air deep cooling dehumidifier, it is characterized in that: comprise the evaporimeter being no less than two, condenser is provided with between two evaporimeters of arbitrary neighborhood, air output along last evaporimeter of compressed air direction of transfer setting is parallel with the frosting device being no less than two, described frosting device has at least one to be in frosting state, remainder is all in defrost state, and compressed air to be dehumidified flows through in staggered evaporimeter and flows to the frosting device being in frosting state after condenser to last evaporimeter;
Also comprise compressor and fluid reservoir, the output of described compressor is connected with the refrigerant inlet of described condenser, the refrigerant exit of condenser is connected with the input of described fluid reservoir, the output of described fluid reservoir is connected with the refrigerant inlet of evaporimeter through first throttle valve on the one hand, be connected through the refrigerant inlet of second throttle with frosting device on the other hand, the refrigerant exit of described evaporimeter is connected with the input of compressor respectively with the refrigerant exit of described frosting device.
2. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, it is characterized in that: each frosting device is provided with photoelectric detection switch, described photoelectric detection switch detects frost thickness in frosting device in real time, closes the compressed air input of frosting device and open defrosting operation when frost thickness is greater than preset value.
3. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, is characterized in that: the operating temperature of described evaporimeter is 2 DEG C ~ 4 DEG C, and the operating temperature of described frosting device is not less than-25 DEG C.
4. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, is characterized in that: the below of described evaporimeter is provided with drips dew collector, and described dew collector is provided with drain valve.
5. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, it is characterized in that: described evaporimeter is finned-tube evaporator, described condenser is fin tube condenser, refrigerant works in the tube side of described finned-tube evaporator and fin tube condenser, and compressed air to be dehumidified plunders finned-tube evaporator and fin tube condenser so that the form of cross-flow is horizontal.
6. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 5, it is characterized in that: it is curved that the tube side of described finned-tube evaporator and fin tube condenser presents Curved Continuous, the fin of the multiple screw-type of outer setting of described finned-tube evaporator and fin tube condenser, zigzag, folding fan-shaped or show window shape.
7. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, it is characterized in that: described frosting device quantity is two, the output of described second throttle is connected with triple valve, and two outputs of described triple valve are connected with the refrigerant inlet of two frosting devices respectively.
8. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, is characterized in that: the refrigerant exit of described evaporimeter is connected with heat exchanger.
9. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 8, is characterized in that: described heat exchanger is shell-and-tube heat exchanger, double pipe heat exchanger or plate type heat exchanger.
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| CN201310240692.2A CN103316568B (en) | 2013-06-18 | 2013-06-18 | Combined type compressed air cryogenic dehumidifier |
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| CN201310240692.2A CN103316568B (en) | 2013-06-18 | 2013-06-18 | Combined type compressed air cryogenic dehumidifier |
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| CN103316568B true CN103316568B (en) | 2015-07-15 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515342B (en) * | 2013-09-29 | 2017-05-24 | 无锡市零度冷暖设备安装有限公司 | All-fresh-air frostless low-temperature air cooler |
| CN105890242B (en) * | 2016-05-31 | 2019-01-11 | 长虹美菱股份有限公司 | A kind of device and method reducing evaporimeter frosting |
| CN107683068A (en) * | 2017-09-21 | 2018-02-09 | 珠海格力电器股份有限公司 | Radiator and frequency converter with same |
| CN108151169A (en) * | 2017-12-22 | 2018-06-12 | 广东美的制冷设备有限公司 | Dehumidifier |
| CN110388695A (en) * | 2018-04-20 | 2019-10-29 | 蒋伟义 | Has the dehumidification device of temperature control |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5936525A (en) * | 1982-08-24 | 1984-02-28 | Eiichi Uratani | Dehumidifier for large volume compressed air for cold district |
| JP2001241693A (en) * | 2000-02-25 | 2001-09-07 | Daikin Ind Ltd | Air conditioner |
| CN2546788Y (en) * | 2002-04-09 | 2003-04-23 | 陈子钟 | Apparatus for raising dehumidifing efficiency |
| CN100579632C (en) * | 2006-12-13 | 2010-01-13 | 财团法人工业技术研究院 | Compound high pressure air cooling dehumidification system |
| US8601825B2 (en) * | 2007-05-15 | 2013-12-10 | Ingersoll-Rand Company | Integrated absorption refrigeration and dehumidification system |
| CN201569229U (en) * | 2009-07-08 | 2010-09-01 | 刘新路 | Automatic defrosting refrigerating dehumidifier |
| CN203342632U (en) * | 2013-06-18 | 2013-12-18 | 东莞理工学院 | Combined compressed air cryogenic dehumidifier |
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Effective date of registration: 20191225 Address after: 510000 room 801, 8th floor, office building, 116 Yuehua Road, Yuexiu District, Guangzhou City, Guangdong Province Patentee after: Guangdong Xing Xing Petrochemical Design Institute Co., Ltd. Address before: 523808 room 12J308, Dongguan University of Technology, Songshan University Road, 1, Guangdong, Dongguan Patentee before: Dongguan University of technology |
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