CN212481775U - Defrosting device for evaporating defrosting refrigerant by using special evaporator - Google Patents
Defrosting device for evaporating defrosting refrigerant by using special evaporator Download PDFInfo
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- CN212481775U CN212481775U CN202020912121.4U CN202020912121U CN212481775U CN 212481775 U CN212481775 U CN 212481775U CN 202020912121 U CN202020912121 U CN 202020912121U CN 212481775 U CN212481775 U CN 212481775U
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Abstract
The utility model discloses an utilize defrosting device of special evaporimeter evaporation defrosting refrigerant, including being arranged in shunting the refrigerant of refrigeration trunk line to the defrosting pipeline in the evaporimeter of treating defrosting, being used for supplying the refrigerant after defrosting to evaporate endothermic special evaporimeter and be arranged in carrying the defrosting liquid outlet pipe of special evaporimeter with the refrigerant after defrosting, 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 special evaporimeter. The defrosting device adopts the special evaporator to carry out uniform evaporation refrigeration on the defrosted refrigerant, so that the evaporation area of the refrigeration system is increased, the evaporation temperature of the refrigeration system is not lower than that of the refrigeration system without defrosting during defrosting, and the refrigerating capacity of the system is improved; and the adjustability is high when the compressor for inducing defrosting exhausts air, the superheat degree is easy to control, meanwhile, the refrigerant can stably and continuously work, and the system stability is high.
Description
Technical Field
The utility model relates to a refrigerating system's defrosting device, concretely relates to utilize defrosting device of special evaporimeter evaporation defrosting refrigerant.
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. In the existing defrosting process, when a defrosting medium passes through an evaporator to be defrosted, heat is released to defrost, and then the defrosting medium is led to the evaporator which is refrigerating to be evaporated and refrigerated.
In the existing continuous defrosting refrigeration system, defrosted defrosting effluent liquid usually enters other front-end pipelines of an evaporator which is performing refrigeration work, is mixed with a refrigerant in a main refrigeration pipeline, and then enters the evaporator to perform refrigeration work; the mass flow of the refrigerant in the main refrigeration pipeline is increased, the area of the evaporator is relatively reduced, and in order to reach the set ambient temperature, the evaporation temperature needs to be lower than that in normal refrigeration operation, so that the refrigeration capacity of the refrigeration system can be reduced. Moreover, the area of the evaporator is relatively reduced, so that the system has high operation pressure and poor stability.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcome the above-mentioned existing problems, and provides a defrosting device using a special evaporator to evaporate a defrosting refrigerant, wherein the defrosting device uses the special evaporator to perform uniform evaporation refrigeration on the defrosted refrigerant, so that the evaporation temperature of a refrigeration system during defrosting is not lower than that during defrosting, and the refrigeration capacity of the system is improved; moreover, the area reduction of the defrosting evaporator is compensated by the special evaporator, so that the operation pressure change of the system is reduced, and the stability of the system is improved.
The purpose of the utility model is realized through the following technical scheme:
a defrosting device for evaporating defrosting refrigerant by utilizing a special evaporator is integrated in a refrigerating system and comprises a defrosting pipeline, a special evaporator 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 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, and the tail end of the defrosting liquid outlet pipeline is connected to the inlet of the special evaporator.
The defrosting device for evaporating defrosting refrigerant by using the special evaporator 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. Then the defrosted refrigerant is conveyed to a special evaporator which is specially used for evaporating and refrigerating the defrosted refrigerant, and finally the refrigerated refrigerant which finishes the evaporation work in the special evaporator is circularly conveyed to a compressor.
In the process, the defrosted refrigerant is introduced into the special evaporator to be evaporated and absorb heat independently, and is not converged with the refrigerant of the main refrigerating pipeline to be refrigerated, but a special evaporation route for the defrosted refrigerant is formed, so that the evaporation temperature of the refrigerating system during defrosting is not lower than that during defrosting, and the refrigerating capacity of the system is improved. Moreover, the area reduction of the defrosting evaporator is compensated by the special evaporator, so that the operation pressure change of the system is reduced, and the stability of the system is improved.
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, can utilize the characteristic that its endothermic ability equals exothermic ability to and the advantage of easily controlling, 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, the defrosting pipeline is provided with a flow control valve for controlling the flow of the refrigerant introduced into the pipeline and a pressure controller for adjusting the pressure of the defrosting medium in the pipeline.
The utility model discloses a preferred scheme, wherein, be equipped with special expansion valve on the defrosting liquid outlet pipe way.
The utility model discloses a preferred scheme, wherein, the export of special evaporimeter is connected with the head end of return circuit pipeline, and the end-to-end connection of this return circuit pipeline is in the import department of compressor. In this way, after evaporation and heat absorption in the dedicated evaporator, the refrigerant in the dedicated evaporator is sent back to the compressor cycle for operation through the loop pipeline.
Compared with the prior art, the utility model following beneficial effect has:
1. the utility model provides a defrosting device lets in the refrigerant after defrosting and independently evaporates the heat absorption in the special evaporimeter, does not refrigerate together with the refrigerant confluence of refrigeration trunk line, but forms the special evaporation route that is used for the refrigerant of defrosting, and the evaporating temperature of refrigerating system when so can be so that defrosting is not less than the evaporating temperature when not defrosting, improves the refrigerating output of system.
2. The refrigerant after defrosting is conveyed to a special evaporator for evaporation and heat absorption, so that the adjustability of the compressor during exhaust can be improved, and the degree of superheat of returned air can be easily controlled.
3. The utility model provides a continuous operation can be stabilized to refrigerant among the defrosting device, and system stability is stronger.
4. The utility model provides a when defrosting device is used for many storehouses, special defrosting evaporator can become the reserve cold source of other storehouses, and balanced storehouse dispels the heat basically, maintains the temperature, satisfies the mutual reserve design demand in many storehouses.
Drawings
FIG. 1 is a pressure-enthalpy diagram of an embodiment, wherein numerals indicate positions of refrigerants, 1a indicates an inlet of a compressor in normal cooling, 2a indicates an inlet of a condenser in normal cooling, 3a indicates an inlet of an expansion valve in normal cooling, and 4a indicates an inlet of an evaporator in normal cooling; 1 represents a compressor inlet during defrosting, 2 represents a condenser inlet during defrosting, 3 represents an expansion valve inlet during defrosting, 4 represents an evaporator inlet during defrosting, 5 represents an evaporator inlet to be defrosted during defrosting, 6 represents an evaporator outlet to be defrosted during defrosting, and 7 represents a special evaporator inlet during defrosting; wherein, the circulation path of the refrigerant as the defrosting medium is as follows: 1-2-5-6-7.
Fig. 2 is a schematic structural view of an embodiment of a defrosting apparatus using a dedicated evaporator to evaporate a defrosting refrigerant, which is applied to a refrigeration system according to the present invention, wherein a dotted line indicates a defrosting pipe.
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 for evaporating defrosting refrigerant by using a dedicated evaporator in the present embodiment is integrated in a refrigeration system, and includes a defrosting pipe 1 for shunting refrigerant of a main refrigeration pipe 12 to an evaporator 3(a) to be defrosted, a dedicated evaporator 5 for evaporating and absorbing heat of the defrosted refrigerant, and a defrosting liquid outlet pipe 4 for delivering the defrosted refrigerant to the dedicated evaporator 5, wherein the defrosting pipe 1 is bypassed to the main refrigeration pipe 12, and 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 dedicated evaporator 5.
Referring to fig. 2, the defrosting pipe 1 is connected at a head end between the compressor 2 and the condenser 7 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 7, 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 9 for controlling the flow of the refrigerant introduced into the pipe and a pressure controller 10 for adjusting the pressure of the defrosting medium in the pipe.
Referring to fig. 2, a dedicated expansion valve 11 is arranged on the defrosting liquid outlet pipe 4.
With reference to fig. 2, the outlet of said dedicated evaporator 5 is connected to the head end of a circuit pipe 6, the end of which circuit pipe 6 is connected at the inlet of the compressor 2. After the heat is absorbed by the evaporation in the dedicated evaporator 5, the refrigerant in the dedicated evaporator 5 is sent back to the compressor 2 through the loop pipe 6 for circulation.
Referring to fig. 1-2, the defrosting method using a dedicated evaporator to evaporate defrosting refrigerant in the present embodiment includes the following steps:
the partial gas refrigerant (most of the gas refrigerant is conveyed to the evaporator 3(b) for normal refrigeration) which is compressed by the compressor 2 to do work and has high temperature and high pressure 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 frost on the evaporator, as in the process 5-6. The defrosted refrigerant is conveyed to a special evaporator 5 which is specially used for evaporating and absorbing heat of the defrosted refrigerant through a defrosting liquid outlet pipeline 4 to form an independent evaporation and heat absorption route, such as a process 6-7-1; the refrigerant in the dedicated evaporator 5 is sent back to the compressor 2 for circulation through the loop pipe 6.
Specifically, in the defrosting operation, at least one evaporator dedicated to cooling is cooling. Of course, the number of evaporators can be three, four or even more.
In this embodiment, the dedicated evaporator is used as a standby cold source for other storehouses to balance heat dissipation of other storehouses. When a plurality of storehouses are used, the special defrosting evaporator can become a standby cold source of other storehouses, the basic heat dissipation of the storehouses is balanced, the temperature is maintained, and the design requirement of mutual standby of the storehouses is met.
Referring to fig. 1-2, the defrosting apparatus using a dedicated evaporator to evaporate defrosting refrigerant in the present embodiment operates on the following principle:
when the defrosting device works, the compressor 2 compresses low-temperature and low-pressure gas refrigerant into high-temperature and high-pressure gas refrigerant through compression work, then a part of 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 the defrosted refrigerant is conveyed to a special evaporator 5 which is specially used for evaporating and refrigerating the defrosted refrigerant, and finally the refrigerated refrigerant evaporated in the special evaporator 5 is circularly conveyed to the compressor 2.
In the process, the defrosted refrigerant is introduced into the special evaporator 5 to carry out evaporation and heat absorption independently, and is not merged with the refrigerant of the main refrigerating pipeline 12 for refrigeration, but a special evaporation route for the defrosted refrigerant is formed, so that the evaporation temperature of a refrigeration system during defrosting is not lower than that during non-defrosting, and the refrigerating capacity of the system is improved; and the adjustability is high when the compressor 2 for guiding the defrosting exhausts, the superheat degree is easy to control, meanwhile, the refrigerant can stably and continuously work, and the system stability is strong.
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 (7)
1. A defrosting device for evaporating defrosting refrigerant by using a special evaporator is integrated in a refrigerating system and is characterized by comprising a defrosting pipeline, a special evaporator 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 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, and the tail end of the defrosting liquid outlet pipeline is connected to the inlet of the special evaporator.
2. The defrosting apparatus using a dedicated evaporator to evaporate defrosting refrigerant according to claim 1, wherein the branched refrigerant is a high temperature and high pressure gas refrigerant or a liquid refrigerant or a vapor-liquid mixture refrigerant.
3. The defrosting apparatus of claim 2 wherein the defrosting conduit is connected between the compressor and the condenser at a head end and at an inlet of the evaporator to be defrosted at a tail end.
4. A defrosting apparatus using an evaporator according to claim 3, wherein the defrosting pipe is provided with a flow control valve for controlling a flow rate of the refrigerant introduced into the pipe.
5. A defrosting apparatus using a dedicated evaporator to evaporate defrosting refrigerant according to claim 3, wherein the defrosting duct is provided with a pressure controller for adjusting a pressure of the defrosting medium in the duct.
6. The defrosting apparatus using the evaporator to evaporate the defrosting refrigerant according to any one of claims 1 to 5 wherein the defrosting liquid outlet pipe is provided with a dedicated expansion valve.
7. The defrosting apparatus of claim 1 wherein the outlet of the dedicated evaporator is connected to the head end of a loop pipe, the tail end of which is connected to the inlet of the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020912121.4U CN212481775U (en) | 2020-05-26 | 2020-05-26 | Defrosting device for evaporating defrosting refrigerant by using special evaporator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020912121.4U CN212481775U (en) | 2020-05-26 | 2020-05-26 | Defrosting device for evaporating defrosting refrigerant by using special evaporator |
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| CN212481775U true CN212481775U (en) | 2021-02-05 |
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| CN202020912121.4U Active CN212481775U (en) | 2020-05-26 | 2020-05-26 | Defrosting device for evaporating defrosting refrigerant by using special evaporator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536725A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device for evaporating defrosting refrigerant by using special evaporator |
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2020
- 2020-05-26 CN CN202020912121.4U patent/CN212481775U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536725A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device for evaporating defrosting refrigerant by using special evaporator |
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