CN105135730A - Refrigerating circulatory system - Google Patents
Refrigerating circulatory system Download PDFInfo
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- CN105135730A CN105135730A CN201510622095.5A CN201510622095A CN105135730A CN 105135730 A CN105135730 A CN 105135730A CN 201510622095 A CN201510622095 A CN 201510622095A CN 105135730 A CN105135730 A CN 105135730A
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- evaporation element
- magnetic valve
- defrosting
- evaporation
- evaporimeter
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Abstract
The invention belongs to the technical field of evaporator defrosting and discloses a refrigerating circulatory system which comprises a compressor, condenser and an evaporation assembly sequentially connected in the same closed loop through a pipeline; the evaporation assembly comprises a first evaporation unit and a second evaporation unit; the first evaporation unit and the second evaporation unit can switch over along three working conditions namely both the first evaporation unit and the second evaporation unit operate normally, the first evaporation unit works and the second evaporation unit defrosts, or the first evaporation unit defrosts and the second evaporation unit works. According to the invention, two evaporation units are adopted to switch over along three working conditions, and the self structure is utilized to realize the defrosting function without halt. The refrigerating circulatory system uniformly divides the original evaporator into two evaporators without increasing the evaporator area, part of pipelines and a control valve are additionally arranged, defrosting without halt is realized, continuous refrigeration can be realized during the defrosting process, the defrosting operation on the evaporator can be realized without additionally providing auxiliary equipment, and the defrosting function is realized without consuming energy additionally.
Description
Technical field
The present invention relates to evaporator defrost technical field, particularly a kind of cooling cycle system.
Background technology
Conventional compression formula refrigeration system is widely used in the showcase etc. in refrigerator car, miniature cold storage and shop and supermarket, in conventional compression formula refrigeration system running, when humid air stream is through evaporimeter, when fin temperature is lower than air dew point temperature, water vapour in air will be separated out, and on fin surface condensation, when fin temperature is lower than 0 DEG C, condensate water will form frost layer at fin surface.Frost is the porous type bulk materials be made up of ice crystal, and its thermal resistance apparent thickness difference is about 90 ~ 450 times of steel pipe.Along with the carrying out of process of refrigerastion, frost thickness and thermal conduction resistance increase gradually, thus reduce the heat transfer coefficient of evaporimeter, increase the resistance of air by finned-tube evaporator, reduce air mass flow, have a strong impact on the heat transfer effect of evaporimeter.And evaporimeter frosting can make the aisle spare between fin reduce, the air mass flow flowing through evaporimeter declines, and makes the heat transfer property of evaporimeter and degrading, may be formed further " frost is stifled ".Conventional compression formula cooling cycle system evaporator defrost mode mainly contains cuts off the defrosting of kind of refrigeration cycle formula, electrical heating type defrosting and the defrosting of hot gas formula.Wherein, cutting off the main shortcoming existed of kind of refrigeration cycle formula defrosting is that when defrosting, refrigeration system shuts down molten frost, and defrosting time is long.Although the main shortcoming existed of electrical heating type defrosting shortens defrosting time, adds additional the defrosting electricity charge.The main shortcoming existed of hot gas formula defrosting needs to install auxiliary equipment to prepare hot gas and extra consumed energy.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: during for solving existing cooling cycle system evaporator defrost, needs the problem of shutting down defrosting or installation auxiliary device.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of cooling cycle system, comprise: be linked in sequence in same closed-loop path by pipeline: compressor, condenser and evaporative component, described evaporative component comprises the first evaporation element and the second evaporation element, described first evaporation element and the second evaporation element can realize: normally run, or evaporation element work, another evaporation element defrost the switching of three kinds of operating modes.
Wherein, described first evaporation element comprises sequential communication: the first capillary and the first evaporimeter, and the entrance of described first capillary is the incoming end of described first evaporation element; Described first capillary paralleling has the first magnetic valve; Described second evaporation element comprises sequential communication: the second capillary and the second evaporimeter, and the entrance of described second capillary is the incoming end of described second evaporation element; Described second capillary paralleling has the 4th magnetic valve.
Wherein, the output of described first evaporation element is communicated with the input of described second evaporation element by the second magnetic valve, and the output of described second evaporation element is communicated with the input of described first evaporation element by the 5th magnetic valve.
Wherein, on the branch road at described first evaporation element place and be positioned at the input of described first evaporation element, output correspondence is provided with the 7th magnetic valve and the 3rd magnetic valve; On the branch road at described second evaporation element place and be positioned at the input of described second evaporation element, output correspondence is provided with the 8th magnetic valve and the 6th magnetic valve.
Wherein, device for drying and filtering is communicated with between described condenser and described evaporative component.
Wherein, described first evaporimeter and the second evaporimeter place are equipped with fan.
(3) beneficial effect
Technique scheme tool has the following advantages: a kind of cooling cycle system of the present invention, by adopting two cover evaporation elements, can realize the switching of three kinds of operating modes, utilizes self structure to realize not shutting down the function of defrosting.This system is that original evaporimeter is equally divided into two evaporimeters, and evaporator area does not increase, and just increases part pipeline and by-pass valve control, realizes not shutting down defrosting, can realize continuous cooling during defrosting; The defrost operation that can realize evaporimeter without the need to additionally providing auxiliary equipment, extra consumed energy realizes the function of defrosting; For evaporimeter internal refrigeration storage agent heating defrosting, evenly, the impact of heat exchanger is less in defrosting; Avoid in defrost process and occur that heating and cooling effect makes the gap between evaporation tube and fin increase, the problem of the degradation of heat exchange performance of heat exchanger; There is the effect of certain recovery cold: owing to originally treating that defrosting evaporator surface coverage had certain thickness frost layer, and temperature is lower, in the middle of the cold-producing medium of temperature enter when the defrosting evaporator from condenser, with treat that the frost layer on defrosting evaporator surface carries out heat exchange, frost is melted gradually, and the cold-producing medium in corresponding evaporimeter is cooled, therefore, treat that defrosting evaporator carries out to a certain degree to cold-producing medium again excessively cold, can recovery section cold.
Accompanying drawing explanation
Fig. 1 is the structural representation of cooling cycle system of the present invention;
Fig. 2 is the switch conditions of cooling cycle system of the present invention each magnetic valve under three kinds of operating modes.
Wherein, the 1, first magnetic valve; 2, the second magnetic valve; 3, the 3rd magnetic valve; 4, the 4th magnetic valve; 5, the 5th magnetic valve; 6, the 6th magnetic valve; 7, the 7th magnetic valve; 8, the 8th magnetic valve; 9, the first evaporimeter; 10, the second evaporimeter; 11, compressor; 12, condenser; 13, device for drying and filtering; 14, the first capillary; 15, the second capillary.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
In describing the invention, it should be noted that, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
As shown in Figure 1, the present invention discloses a kind of cooling cycle system, does not shut down online defrost function for realizing in refrigerative circle system; This cooling cycle system comprises: be linked in sequence in same closed-loop path by pipeline: compressor 11, condenser 12 and evaporative component, described evaporative component comprises the first evaporation element and the second evaporation element, described first evaporation element and the second evaporation element can realize: normally run, or evaporation element work, another evaporation element defrost the switching of three kinds of operating modes.
Because this cooling cycle system have employed two evaporation elements, first evaporation element and the second evaporation element parallel with one another, by switching the switching that can realize three kinds of operating modes: normally run, namely the first evaporation element and the second evaporation element all participate in the circulation of whole system with normal duty; First evaporation element defrosting, cold-producing medium now in loop is in heat release state through the first evaporation element, realize the defrost operation to the first evaporation element, but cold-producing medium is then in normal heat absorption state in the second evaporation element, ensure the normal circulation refrigeration of whole system, realize the function of not shutting down online defrosting; Second evaporation element defrosting, principle is similar to the first evaporation element defrosting operating condition, and just the operating mode of two evaporation elements is exchanged.
Concrete, described first evaporation element comprises sequential communication: the first capillary 14 and the first evaporimeter 9, and the entrance of described first capillary 14 is the incoming end of described first evaporation element; Described first capillary 14 is parallel with the first magnetic valve 1; Described second evaporation element comprises sequential communication: the second capillary 15 and the second evaporimeter 10, and the entrance of described second capillary 15 is the incoming end of described second evaporation element; Described second capillary 15 is parallel with the 4th magnetic valve 4.
For the first refrigeration unit, when normally working, cold-producing medium first by after the first capillary 14 step-down, then enters in the first evaporimeter 9 and absorbs heat, and finally gets back in compressor 11 and participates in circulation next time; When first evaporimeter 9 defrosts, condenser 12 high-pressure refrigerant out directly enters the first evaporimeter 9 through the first magnetic valve 1 and carries out heat release, realize the defrost operation to the first evaporimeter 9, meanwhile the second evaporation element still normally works, and the circulation of whole cooling cycle system can't be influenced; The structure of the second evaporimeter 10 is identical with the first evaporimeter 9, and operation principle repeats no more.
Further, the output of described first evaporation element is communicated with the input of described second evaporation element by the second magnetic valve 2, and the output of described second evaporation element is communicated with the input of described first evaporation element by the 5th magnetic valve 5.On the branch road at described first evaporation element place and be positioned at the input of described first evaporation element, output correspondence is provided with the 7th magnetic valve 7 and the 3rd magnetic valve 3; On the branch road at described second evaporation element place and be positioned at the input of described second evaporation element, output correspondence is provided with the 8th magnetic valve 8 and the 6th magnetic valve 6.Device for drying and filtering 13 is communicated with between described condenser 12 and described evaporative component.Described first evaporimeter 9 and the second evaporimeter 10 place are equipped with fan.
Below according to kind of the operating mode of three such as listed by Fig. 2, the operation principle of this cooling cycle system is described in detail:
1, accidental conditions: the 3rd magnetic valve 3, the 6th magnetic valve 6, the 7th magnetic valve 7, the 8th magnetic valve 8 are opened, remaining first magnetic valve 1, second magnetic valve 2, the 4th magnetic valve 4, the 5th magnetic valve 5 are closed; First evaporation element and the second evaporation element parallel running, simultaneously as the evaporative component of cooling cycle system.Cold-producing medium is in high-temperature high-pressure state after compressor 11 compresses, and enter condenser 12 condensation heat release, discharge a part of heat, the middle temperature high-pressure refrigerant drying filter 13 after heat release enters the first evaporation element and the second evaporation element respectively; For the first evaporation element, middle temperature high-pressure refrigerant enters the rear pressure drop of the first capillary 14, and temperature also declines thereupon, becomes the cold-producing medium of low-temp low-pressure; Low-temperature low-pressure refrigerant enters the first evaporimeter 9 and starts heat absorption, after heat absorption becomes the cold-producing medium of middle temperature low pressure, enters compressor 11 and participates in circulation next time; The operation principle of the second evaporation element is identical with the principle of the first evaporation element, repeats no more herein.
2, the first evaporimeter 9 is in defrosting operating condition: the first magnetic valve 1, second magnetic valve 2, the 6th magnetic valve 6, the 7th magnetic valve 7 are opened, and remaining 3rd magnetic valve 3, the 4th magnetic valve 4, the 5th magnetic valve 5, the 8th magnetic valve 8 are closed; Second evaporation element normally works.Cold-producing medium is in high-temperature high-pressure state after compressor 11 compresses, enter the rear condensation heat release of condenser 12, discharge a part of heat, middle temperature high-pressure refrigerant after heat release is after device for drying and filtering 13, successively through the 7th magnetic valve 7, first magnetic valve 1, first evaporimeter 9, second magnetic valve 2, second capillary 15, second evaporimeter 10, 6th magnetic valve 6 is got back in compressor 11, cold-producing medium is walked around the first capillary 14 and is directly entered the first evaporimeter 9 in the first evaporation element, the cold-producing medium of middle temperature high pressure is without step-down, by the temperature of cold-producing medium during the first evaporimeter 9 far above 0 degree Celsius, first evaporimeter 9 surface temperature raises, its surperficial frost layer is made to be heated by tube wall and melt rapidly, realize defrost function, after cold-producing medium flows out the first evaporimeter 9, pipeline through the second magnetic valve 2 place gets back to the input of the second evaporation element, then, after the second capillary 15 reducing pressure by regulating flow, enter the second evaporimeter 10 and absorb heat, become saturated gas enter compressor 11 participate in next time circulation.
After the first evaporimeter 9 defrosting mode terminates, by the connected state of switching solenoid valve, enter the second evaporimeter 10 defrosting operating condition.
3, the second evaporimeter 10 is in defrosting operating condition: the principle that this operation principle and the first evaporimeter 9 are in defrosting operating condition is similar, only the state of all magnetic valves need be carried out switching, that is: the 3rd magnetic valve 3, the 4th magnetic valve 4, the 5th magnetic valve 5, the 8th magnetic valve 8 switch to opening, and remaining first magnetic valve 1, second magnetic valve 2, the 6th magnetic valve 6, the 7th magnetic valve 7 switch to closed condition; Because the first evaporation element and the second evaporation element are set up in parallel, both structures are identical, so no longer repeat its operation principle herein.
After the first evaporimeter 9 and the second evaporimeter 10 all complete defrosting operating condition, switch above-mentioned magnetic valve, system comes back to accidental conditions.
As can be seen from the above embodiments, the present invention is by adopting double evaporators, eight magnetic valve connecting lines are set, by the combination of each electromagnetic valve switch state, this cooling cycle system can realize three kinds of operating modes: accidental conditions, the first evaporimeter 9 defrosting operating condition, the second evaporimeter 10 defrosting operating condition.This system is that original evaporimeter is equally divided into two evaporimeters, and evaporator area does not increase, and just increases part pipeline and by-pass valve control, realizes not shutting down defrosting, can realize continuous cooling during defrosting; The defrost operation that can realize evaporimeter without the need to additionally providing auxiliary equipment, extra consumed energy realizes the function of defrosting; For evaporimeter internal refrigeration storage agent heating defrosting, evenly, the impact of heat exchanger is less in defrosting; Avoid in defrost process and occur that heating and cooling effect makes the gap between evaporation tube and fin increase, the problem of the degradation of heat exchange performance of heat exchanger; There is the effect of certain recovery cold: owing to originally treating that defrosting evaporator surface coverage had certain thickness frost layer, and temperature is lower, in the middle of the cold-producing medium of temperature enter when the defrosting evaporator from condenser 12, with treat that the frost layer on defrosting evaporator surface carries out heat exchange, frost is melted gradually, and the cold-producing medium in corresponding evaporimeter is cooled, therefore, treat that defrosting evaporator carries out to a certain degree to cold-producing medium again excessively cold, can recovery section cold.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (6)
1. a cooling cycle system, it is characterized in that, comprise: be linked in sequence in same closed-loop path by pipeline: compressor (11), condenser (12) and evaporative component, described evaporative component comprises the first evaporation element and the second evaporation element, described first evaporation element and the second evaporation element can realize: normally run, or evaporation element work, another evaporation element defrost the switching of three kinds of operating modes.
2. cooling cycle system as claimed in claim 1, it is characterized in that, described first evaporation element comprises sequential communication: the first capillary (14) and the first evaporimeter (9), and the entrance of described first capillary (14) is the incoming end of described first evaporation element; Described first capillary (14) is parallel with the first magnetic valve (1);
Described second evaporation element comprises sequential communication: the second capillary (15) and the second evaporimeter (10), and the entrance of described second capillary (15) is the incoming end of described second evaporation element; Described second capillary (15) is parallel with the 4th magnetic valve (4).
3. cooling cycle system as claimed in claim 2, it is characterized in that, the output of described first evaporation element is communicated with the input of described second evaporation element by the second magnetic valve (2), and the output of described second evaporation element is communicated with the input of described first evaporation element by the 5th magnetic valve (5).
4. cooling cycle system as claimed in claim 3, it is characterized in that, on the branch road at described first evaporation element place and be positioned at the input of described first evaporation element, output correspondence is provided with the 7th magnetic valve (7) and the 3rd magnetic valve (3); On the branch road at described second evaporation element place and be positioned at the input of described second evaporation element, output correspondence is provided with the 8th magnetic valve (8) and the 6th magnetic valve (6).
5. cooling cycle system as claimed in claim 1, is characterized in that, be communicated with device for drying and filtering (13) between described condenser (12) and described evaporative component.
6. cooling cycle system as claimed in claim 2, is characterized in that, described first evaporimeter (9) and the second evaporimeter (10) place are equipped with fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510622095.5A CN105135730A (en) | 2015-09-25 | 2015-09-25 | Refrigerating circulatory system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510622095.5A CN105135730A (en) | 2015-09-25 | 2015-09-25 | Refrigerating circulatory system |
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| CN105135730A true CN105135730A (en) | 2015-12-09 |
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| CN201510622095.5A Pending CN105135730A (en) | 2015-09-25 | 2015-09-25 | Refrigerating circulatory system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107053997A (en) * | 2016-12-22 | 2017-08-18 | 重庆长安汽车股份有限公司 | Automobile air-conditioning evaporator defroster and method |
| CN107144123A (en) * | 2017-07-18 | 2017-09-08 | 合肥万都云雅制冷科技股份有限公司 | A kind of heat pump dryer system |
| CN107228529A (en) * | 2017-07-07 | 2017-10-03 | 河南瑞凌科技有限公司 | A kind of family expenses ex situ freeze dryer |
| WO2018191877A1 (en) * | 2017-04-19 | 2018-10-25 | Abb Schweiz Ag | Cooling system and cooling method |
| WO2019129195A1 (en) * | 2017-12-29 | 2019-07-04 | 杨吉 | Device for absorbing latent heat of water for heating and submersible latent heat pump |
| WO2020150889A1 (en) * | 2019-01-22 | 2020-07-30 | 北京卡林新能源技术有限公司 | Control system for sequential defrosting of moist-air heat exchanger |
| CN114489175A (en) * | 2021-12-31 | 2022-05-13 | 北京京仪自动化装备技术股份有限公司 | Temperature control system |
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| CN114489175A (en) * | 2021-12-31 | 2022-05-13 | 北京京仪自动化装备技术股份有限公司 | Temperature control system |
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Application publication date: 20151209 |