CN212274329U - Defrosting device adopting defrosted refrigerant to directly spray liquid for evaporation - Google Patents
Defrosting device adopting defrosted refrigerant to directly spray liquid for evaporation Download PDFInfo
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- CN212274329U CN212274329U CN202020912017.5U CN202020912017U CN212274329U CN 212274329 U CN212274329 U CN 212274329U CN 202020912017 U CN202020912017 U CN 202020912017U CN 212274329 U CN212274329 U CN 212274329U
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Abstract
The utility model discloses an adopt defrosting device of the direct hydrojet evaporation of refrigerant after defrosting, integrated in refrigerating system, including being arranged in shunting the refrigerant of refrigeration trunk line to the defrosting pipeline of treating in the evaporimeter of defrosting and being arranged in carrying the refrigerant after defrosting to the defrosting liquid outlet pipe in the refrigerated evaporimeter, the defrosting pipeline is other to be connected on the refrigeration trunk line, the exit at the evaporimeter of treating defrosting is connected to the head end of defrosting liquid outlet pipe, and end-to-end connection is in the import department of refrigerated evaporimeter, and this terminal tie point is located the expansion valve on the refrigeration trunk line and is between the refrigerated evaporimeter. The utility model discloses refrigerant after will defrosting converges with the refrigerant after the throttle in the refrigeration trunk line to evaporating in getting into the evaporimeter, and controlling return air superheat degree near the low value of reasonable scope, evaporating temperature when the evaporating temperature in the refrigerating system was close with when not defrosting this moment, thereby improved the refrigerating output.
Description
Technical Field
The utility model relates to a refrigerating system's defrosting device, concretely relates to defrosting device that adopts the direct hydrojet of refrigerant after defrosting to evaporate.
Background
The refrigerant defrosting technology is an energy-saving technology, and in the prior art, superheated gas refrigerant is generally adopted as a defrosting medium to defrost an evaporator; there are of course also liquid refrigerants used as defrosting media.
The conventional defrosting refrigeration system mainly adopts modes such as reverse cycle defrosting and liquid storage type discontinuous defrosting, and the defrosting mode has the following problems:
1. in the evaporator, in order to completely convert the refrigerant into the gas refrigerant, the opening degree of the expansion valve or the opening size of the evaporator is controlled, so that the refrigerant is almost completely evaporated and converted into the gas when moving to the rear section of the evaporation channel, and thus, although the liquid refrigerant can be effectively prevented from entering the compressor, and the compressor is protected, the gas refrigerant in the rear section of the evaporation channel can not be evaporated and absorb heat any more, so that the evaporation area of the rear section of the evaporation channel is wasted, the evaporation temperature of the refrigeration system is lower than that when the refrigeration system is not defrosted, the superheat degree is higher, and the refrigerating capacity is reduced.
2. The structure of the refrigeration system is complex, and branches and valves are numerous, which results in higher manufacturing cost of the whole refrigeration system and more complex control method.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that above-mentioned exists, provide an adopt the direct hydrojet of refrigerant evaporated defrosting device after the defrosting, refrigerant after this defrosting device converges with the refrigerant after the throttle in the refrigeration trunk line to evaporate in getting into the evaporimeter, and control return air superheat degree near the low value of reasonable scope, evaporating temperature when the evaporating temperature in the refrigerating system was close with not defrosting this moment, thereby improved the refrigerating output.
The purpose of the utility model is realized through the following technical scheme:
a defrosting device adopting defrosted refrigerant to directly spray liquid for evaporation is integrated in a refrigerating system and comprises a defrosting pipeline and a defrosting liquid outlet pipeline, wherein the defrosting pipeline is used for shunting the refrigerant of a main refrigerating pipeline into an evaporator to be defrosted, the defrosting liquid outlet pipeline is used for conveying the defrosted refrigerant into the refrigerating evaporator,
the defrosting pipeline is connected to the main refrigerating pipeline in a bypassing mode, the head end of the defrosting liquid outlet pipeline is connected to the outlet of the evaporator to be defrosted, the tail end of the defrosting liquid outlet pipeline is connected to the inlet of the evaporator which is refrigerating, and the connection point of the tail end is located between the expansion valve on the main refrigerating pipeline and the evaporator which is refrigerating.
The defrosting device adopting the direct liquid spraying and evaporation of the defrosted refrigerant has the working principle that:
when the defrosting device works, the compressor compresses low-temperature and low-pressure gas refrigerant into high-temperature and high-pressure gas refrigerant through compression work, then part of the high-temperature and high-pressure gas refrigerant is shunted to the evaporator to be defrosted through the defrosting pipeline, and the gas refrigerant is used as defrosting medium to release heat to melt frosting on the evaporator. And then merging the defrosted refrigerant into a main refrigerating pipeline to enable the defrosted refrigerant to be merged with the throttled refrigerant in the main refrigerating pipeline and enter a refrigerating evaporator together for evaporation and refrigeration, and finally circularly conveying the refrigerated refrigerant to a compressor.
In the process, the defrosted refrigerant is directly introduced into the evaporator without throttling, and after entering the evaporator, the defrosted refrigerant can be evaporated and absorb heat in the evaporation pipeline in the whole process, so that the effective evaporation heat exchange area of the refrigerant in the evaporator is increased, the evaporation temperature of the refrigeration system during defrosting is close to the evaporation temperature during non-defrosting, the refrigeration capacity is improved, and the refrigeration system has the advantages of simple composition structure, low cost and the like.
The utility model discloses a preferred scheme, wherein, the refrigerant of reposition of redundant personnel is high-temperature high-pressure gas refrigerant or liquid refrigerant or vapour-liquid mixture refrigerant. Wherein, adopt vapour-liquid mixture body as the medium of defrosting, utilize the characteristic that its endothermic ability equals exothermic ability to and the advantage of easy control, even reveal the heat for the external world in the in-process of defrosting, nevertheless through subsequent evaporation heat absorption, also can absorb the heat back equally, can not reduce refrigerating system's refrigeration efficiency.
The utility model discloses a preferred scheme, wherein, the head end of defrosting pipeline is connected between compressor and condenser, and end-to-end connection is in the import department of the evaporimeter of treating the defrosting. In this way, it is possible to deliver a high enthalpy of the gaseous refrigerant to the evaporator to be defrosted, thereby achieving efficient defrosting operation. Of course, after the head end of the defrosting pipeline is connected with the condenser, the condensed liquid refrigerant is conveyed to the evaporator to be defrosted.
Preferably, a flow control valve for controlling the flow of the refrigerant introduced into the defrosting pipe is arranged on the defrosting pipe.
Preferably, a pressure controller for adjusting the pressure of the defrosting medium in the defrosting pipeline is arranged on the defrosting pipeline.
Compared with the prior art, the utility model following beneficial effect has:
1. the utility model provides a during the defrosting device directly lets in the evaporimeter with the refrigerant after defrosting, do not pass through the throttle, evaporate in the evaporimeter, increase the effectual evaporation heat transfer area of refrigerant in the evaporimeter, the refrigerant after defrosting can be whole in the evaporation pipeline the evaporation heat absorption, reduce the return air superheat degree of refrigerant, with return air superheat degree control near the low value of reasonable scope, refrigerating system's evaporating temperature is close with the evaporating temperature when not defrosting when making the defrosting, thereby improve the refrigerating output.
2. Use the utility model provides a defrosting device's refrigerating system has and constitutes advantages such as simple structure, cost are lower and easy control.
Drawings
FIG. 1 is a pressure-enthalpy diagram in which the numerals represent the locations of the refrigerant, 1 represents the inlet of the compressor in defrosting operation, 2 represents the inlet of the condenser in defrosting operation, 3 represents the inlet of the expansion valve in defrosting operation, 4 represents the inlet of the evaporator for cooling in defrosting operation, 5 represents the inlet of the evaporator to be defrosted in defrosting operation, 6 represents the outlet of the evaporator to be defrosted in defrosting operation, and 7 represents the inlet of the evaporator for cooling in defrosting operation; wherein, the circulation path of the refrigerant as the defrosting medium is as follows: 1-2-5-6-7. 1a represents the inlet of the compressor in non-defrosted operation, 2a represents the inlet of the condenser in non-defrosted operation, 3a represents the inlet of the expansion valve in non-defrosted operation, and 4a represents the inlet of the evaporator in non-defrosted operation.
Fig. 2 is a schematic structural diagram of an embodiment of the defrosting apparatus using direct spray evaporation of the defrosted refrigerant, which is applied to a refrigeration system, in the present invention, wherein the dotted line represents a defrosting pipeline.
Detailed Description
In order to make those skilled in the art understand the technical solution of the present invention well, the present invention will be further described below with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.
Example 1
Referring to fig. 2, the defrosting apparatus using direct liquid spraying evaporation of defrosted refrigerant in the present embodiment is integrated in a refrigeration system, and includes a defrosting pipe 1 for shunting the refrigerant of a main refrigeration pipe 5 to an evaporator 3(a) to be defrosted and a defrosting liquid outlet pipe 4 for delivering the defrosted refrigerant to the evaporator 3(b) being refrigerated, the defrosting pipe 1 is bypassed on the main refrigeration pipe 5, a head end of the defrosting liquid outlet pipe 4 is connected to an outlet of the evaporator 3(a) to be defrosted, and a tail end of the defrosting liquid outlet pipe 4 is connected to an inlet of the evaporator 3(b) being refrigerated, and a connection point of the tail end is located between an expansion valve on the main refrigeration pipe 5 and the evaporator 3(b) being refrigerated.
Referring to fig. 2, the defrosting pipe 1 is connected at a head end between the compressor 2 and the condenser 6 and at a tail end at an inlet of the evaporator 3(a) to be defrosted. In this way, it is possible to deliver a high enthalpy of the gas refrigerant into the evaporator 3(a) to be defrosted, thereby achieving an efficient defrosting operation. Of course, the head end of the defrosting pipe 1 is connected to the condenser 6, and then the condensed liquid refrigerant is sent to the evaporator 3(a) to be defrosted.
Furthermore, the defrosting pipe 1 is provided with a flow control valve 8 for controlling the flow of the refrigerant introduced into the pipe and a pressure controller 9 for adjusting the pressure of the defrosting medium in the pipe.
Referring to fig. 1-2, the defrosting method using direct spray evaporation of defrosted refrigerant in this embodiment includes the following steps:
part of high-temperature and high-pressure gas refrigerant (mostly used for normal refrigeration work and a small part for defrosting of the evaporator) formed by compressing work by the compressor 2 is shunted to the evaporator 3(a) to be defrosted through the defrosting pipeline 1, and the gas refrigerant is used as a defrosting medium to release heat to melt frosting on the evaporator, as in the process 5-6. The defrosted refrigerant is converged with the throttled refrigerant in the main refrigerating pipeline 5 through the defrosting liquid outlet pipeline 4, and enters the evaporator 3(b) which is refrigerating for evaporation and refrigeration, as in the process 6-7-1; the refrigerant is sent back to the compressor 2 to be circulated.
Further, during defrosting operation, at least one evaporator is refrigerating; of course, the number of evaporators can be three, four or even more.
Referring to fig. 2, the defrosting apparatus using direct spray evaporation of defrosted refrigerant in the present embodiment operates according to the following principle:
when the defrosting device works, the compressor 2 compresses part of low-temperature and low-pressure gas refrigerant into high-temperature and high-pressure gas refrigerant by compression work, then the high-temperature and high-pressure gas refrigerant is shunted to the evaporator 3(a) to be defrosted through the defrosting pipeline 1, and the gas refrigerant is used as defrosting medium to release heat to melt frosting on the evaporator. Then merging the defrosted refrigerant into the main refrigerating pipeline 5 to enable the defrosted refrigerant and the throttled refrigerant in the main refrigerating pipeline 5 to be merged and enter the evaporator 3(b) which is refrigerating together for evaporation and refrigeration, and finally circularly conveying the refrigerated refrigerant into the compressor 2.
In the process, the defrosted refrigerant is directly introduced into the evaporator without throttling, and after entering the evaporator, the defrosted refrigerant can be evaporated and absorb heat in the evaporation pipeline in the whole process, so that the effective evaporation heat exchange area of the refrigerant in the evaporator is increased, the evaporation temperature of the refrigeration system during defrosting is close to the evaporation temperature during non-defrosting, the refrigeration capacity is improved, and the refrigeration system has the advantages of simple composition structure, low cost and the like.
Example 2
Unlike embodiment 1, in this embodiment, a vapor-liquid mixture refrigerant is obtained by cooling a gas refrigerant or mixing a gas refrigerant with a liquid refrigerant, and the vapor-liquid mixture refrigerant is used as a defrosting medium for defrosting. Therefore, the vapor-liquid mixture with the heat absorbing capacity not less than the heat releasing capacity is adopted as the defrosting medium, so that the defrosting device is easy to control, and the refrigerating efficiency of the refrigerating system cannot be reduced.
The above is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (5)
1. A defrosting device adopting defrosted refrigerant to directly spray liquid for evaporation is integrated in a refrigerating system and is characterized by comprising a defrosting pipeline and a defrosting liquid outlet pipeline, wherein the defrosting pipeline is used for shunting the refrigerant of a main refrigerating pipeline into an evaporator to be defrosted, the defrosting liquid outlet pipeline is used for conveying the defrosted refrigerant into the refrigerating evaporator,
the defrosting pipeline is connected to the main refrigerating pipeline in a bypassing mode, the head end of the defrosting liquid outlet pipeline is connected to the outlet of the evaporator to be defrosted, the tail end of the defrosting liquid outlet pipeline is connected to the inlet of the evaporator which is refrigerating, and the connection point of the tail end is located between the expansion valve on the main refrigerating pipeline and the evaporator which is refrigerating.
2. The defrosting device adopting direct liquid spraying evaporation of defrosted refrigerant according to claim 1, wherein the branched refrigerant is high-temperature and high-pressure gas refrigerant or liquid refrigerant or vapor-liquid mixture refrigerant.
3. The defrosting apparatus using direct spray evaporation of defrosted refrigerant according to claim 2 wherein the defrosting conduit is connected at a head end between the compressor and the condenser and at a tail end at an inlet of the evaporator to be defrosted.
4. The defrosting device using direct spray evaporation of defrosted refrigerant according to claim 3 wherein the defrosting conduit is provided with a flow control valve for controlling the flow of refrigerant to the conduit.
5. The defrosting apparatus using direct spray evaporation of defrosted refrigerant according to claim 4 wherein the defrosting conduit is provided with a pressure controller for adjusting the pressure of the defrosting medium in the conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020912017.5U CN212274329U (en) | 2020-05-26 | 2020-05-26 | Defrosting device adopting defrosted refrigerant to directly spray liquid for evaporation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020912017.5U CN212274329U (en) | 2020-05-26 | 2020-05-26 | Defrosting device adopting defrosted refrigerant to directly spray liquid for evaporation |
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| CN212274329U true CN212274329U (en) | 2021-01-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536719A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting defrosted refrigerant to directly spray liquid for evaporation |
| CN113551450A (en) * | 2021-07-20 | 2021-10-26 | 广东博益空调配套设备有限公司 | Flow-equalizing defrosting heat exchange device |
-
2020
- 2020-05-26 CN CN202020912017.5U patent/CN212274329U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536719A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting defrosted refrigerant to directly spray liquid for evaporation |
| CN113551450A (en) * | 2021-07-20 | 2021-10-26 | 广东博益空调配套设备有限公司 | Flow-equalizing defrosting heat exchange device |
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