CN212962271U - Indirect cooling system for defrosting by utilizing exhaust waste heat - Google Patents
Indirect cooling system for defrosting by utilizing exhaust waste heat Download PDFInfo
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- CN212962271U CN212962271U CN202021808344.2U CN202021808344U CN212962271U CN 212962271 U CN212962271 U CN 212962271U CN 202021808344 U CN202021808344 U CN 202021808344U CN 212962271 U CN212962271 U CN 212962271U
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Abstract
The utility model relates to an utilize indirect cooling system of exhaust waste heat defrosting, including secondary refrigerant defrost system, air-cooler, refrigerant circulating system is connected in order to refrigerate the secondary refrigerant with secondary refrigerant circulating system, secondary refrigerant defrost system includes heat recovery device, secondary refrigerant circulating pipe, heat recovery device and secondary refrigerant circulating pipe are connected to make the secondary refrigerant in the secondary refrigerant circulating pipe carry out the heat transfer in the heat recovery device, the exit end intercommunication of heat exchange tube in liquid regulation station and the air-cooler is passed through to the one end of secondary refrigerant circulating pipe. When the utility model is defrosted, the refrigerant discharged from the compressor firstly exchanges heat and cools through the heat recovery device, and then enters the condenser for condensation; because the temperature of the refrigerant entering the condenser is lower than the temperature of the refrigerant in the original normal working, the condensing temperature in the defrosting process is lower than the condensing temperature in the original normal working process, and the energy consumption of the compressor is reduced.
Description
Technical Field
The utility model relates to a refrigeration plant defrosting technical field, concretely relates to utilize indirect cooling system of exhaust waste heat defrosting.
Background
The main methods for defrosting an air cooler and a discharge pipe of the existing indirect cooling system comprise: water defrosting, electric heating coolant defrosting, manual defrosting and the like.
The water defrosting needs water with a certain temperature to melt a frost layer, and is only suitable for defrosting of an air cooler; the electric defrosting is to melt the frost layer of the air cooler by electric heat and is only suitable for defrosting of the air cooler; the electric heating secondary refrigerant defrosting is to heat the secondary refrigerant by electric energy and then send the secondary refrigerant to a pipe bank and an air cooler for defrosting, and certain electric energy needs to be consumed; the manual frost sweeping is that workers directly sweep frost for the calandria, the labor intensity is high, and the manual frost sweeping is only suitable for sweeping frost for smooth calandria.
The existing several defrosting schemes have the following disadvantages: 1. electric defrosting and electric heating secondary refrigerant defrosting both need to consume electric energy, and the energy consumption is large; 2. the water defrosting needs to be provided with a defrosting water tank (water tank) and also needs to consume defrosting water with a certain temperature; the manual frost sweeping applicability is poor, and the labor intensity is high.
SUMMERY OF THE UTILITY MODEL
For solving the problem that prior art exists, the utility model provides an utilize indirect cooling system of exhaust waste heat defrosting.
In order to achieve the above object, the utility model adopts the following technical scheme:
the indirect cooling system comprises a refrigerant circulating system, a secondary refrigerant defrosting system and an air cooler, wherein the refrigerant circulating system is connected with the secondary refrigerant circulating system to refrigerate secondary refrigerant, the secondary refrigerant defrosting system comprises a heat recoverer and a secondary refrigerant circulating pipe, the heat recoverer is connected with the secondary refrigerant circulating pipe to ensure that the secondary refrigerant in the secondary refrigerant circulating pipe exchanges heat in the heat recoverer, one end of the secondary refrigerant circulating pipe is communicated with the outlet end of a heat exchange pipe in the air cooler through a liquid return adjusting station, the other end of the secondary refrigerant circulating pipe is communicated with the inlet end of the heat exchange pipe in the air cooler through a liquid supply adjusting station, and a defrosting pump is installed on the secondary refrigerant circulating pipe.
In any of the above schemes, preferably, the secondary refrigerant circulating pipe includes a circulating liquid inlet pipe and a circulating liquid outlet pipe, one end of the circulating liquid inlet pipe is connected to a first inlet on the heat recovery device, the other end of the circulating liquid inlet pipe is connected to an outlet end of a heat exchange pipe on the air cooler through a liquid return adjusting station, one end of the circulating liquid outlet pipe is connected to a first outlet on the heat recovery device, the other end of the circulating liquid outlet pipe is connected to an inlet end of the heat exchange pipe on the air cooler through a liquid supply adjusting station, and the defrosting pump is installed on the circulating liquid inlet pipe.
In any of the above schemes, preferably, the refrigerant circulation system includes a compressor, a condenser, and an evaporator, the compressor, the condenser, and the evaporator are connected by a first pipeline to form a closed loop circulation system, and a first valve is installed on the first pipeline between the compressor and the condenser.
In any of the above schemes, preferably, the compressor, the heat recovery device and the condenser are sequentially connected through a second pipeline, so that a refrigerant discharged from the compressor enters the condenser after heat exchange through the heat recovery device, and a second valve is installed on the second pipeline.
In any of the above schemes, preferably, the secondary refrigerant circulating system includes a secondary refrigerant liquid supply pipe and a secondary refrigerant liquid return pipe, one end of each of the secondary refrigerant liquid supply pipe and the secondary refrigerant liquid return pipe is connected to the evaporator, the other end of the secondary refrigerant liquid supply pipe is connected to the inlet end of the heat exchange pipe in the air cooler through a liquid supply adjusting station, and the other end of the secondary refrigerant liquid return pipe is connected to the outlet end of the heat exchange pipe in the air cooler through a liquid return adjusting station, so as to form a refrigerating cycle of the secondary refrigerant.
In any of the above solutions, preferably, a coolant pump is installed on the coolant return pipe.
In any of the above schemes, preferably, the liquid supply adjusting station and the liquid return adjusting station include a plurality of liquid supply pipelines connected in parallel, and liquid supply valves are respectively installed on the plurality of liquid supply pipelines.
In any of the above schemes, preferably, the inlet end and the outlet end of the heat exchange tube in the air cooler are both communicated with the corresponding secondary refrigerant liquid return tube and the secondary refrigerant liquid supply tube through liquid supply pipelines.
In any of the above embodiments, preferably, the coolant circulation pipe is respectively communicated with the inlet end and the outlet end of the heat exchange pipe in the air cooler through a liquid supply pipeline.
Compared with the prior art, the utility model provides an utilize indirect cooling system of exhaust waste heat defrosting has following beneficial effect:
1. during defrosting, refrigerant discharged by a compressor is subjected to heat exchange and temperature reduction through a heat recoverer, and then enters a condenser for condensation; because the temperature of the refrigerant entering the condenser is lower than the temperature of the refrigerant in the original normal work, the condensing temperature in the defrosting process is lower than the condensing temperature in the original normal work, the energy consumption of the compressor is reduced, the electric energy for electric defrosting, the electric energy for heating the secondary refrigerant and the defrosting water consumption for flushing the frost are saved, and the energy consumption for defrosting is directly saved;
2. the defrosting method is applicable to all evaporators, is applicable to air coolers, smooth tube banks and fin tube banks, and has wide application range and strong applicability;
3. as long as the compressor in the system runs, the defrosting pump can absorb the exhausted waste heat through the heat recoverer for melting the frost layer of the heat exchange tube on the exhaust tube and the air cooler, so that the defrosting system is reliable and guaranteed, and the labor intensity is low.
Drawings
FIG. 1 is a flow chart of an indirect cooling system using exhaust heat to defrost according to the present invention;
the figures are labeled as follows: 1. a compressor; 2. a condenser; 3. a throttle valve; 4. an evaporator; 5. a heat recovery device; 6. a coolant pump; 7. a defrost pump; 8. a liquid supply regulation station; 9. an air cooler; 10. a secondary refrigerant outlet pipe; 11. a secondary refrigerant inlet pipe; 12. a second valve; 13. a secondary refrigerant liquid supply pipe; 14. a secondary refrigerant liquid return pipe; 15. a first valve; 16. and a liquid return adjusting station.
Detailed Description
In order to further understand the present invention, the present invention will be described in detail with reference to the following embodiments.
As shown in fig. 1, according to the utility model provides an utilize indirect cooling system's of exhaust waste heat defrosting embodiment, including refrigerant cycle system, secondary refrigerant circulation system, still include secondary refrigerant defrost system, air-cooler 9, refrigerant cycle system is connected with secondary refrigerant cycle system in order to refrigerate the secondary refrigerant, secondary refrigerant defrost system includes heat recovery device 5, secondary refrigerant circulating pipe, heat recovery device 5 is connected with the secondary refrigerant circulating pipe to make the secondary refrigerant in the secondary refrigerant circulating pipe carry out the heat transfer in heat recovery device 5, the exit end intercommunication of heat exchange tube in liquid returning regulation station 16 and the air-cooler 9 is passed through to the one end of secondary refrigerant circulating pipe, the other end of secondary refrigerant circulating pipe is through the inlet end intercommunication of supplying liquid regulation station 8 and the heat exchange tube in the air-cooler 9, install defrosting pump 7 on the secondary refrigerant circulating pipe.
The secondary refrigerant circulating pipe comprises a circulating liquid inlet pipe and a circulating liquid outlet pipe, one end of the circulating liquid inlet pipe is connected with a first inlet on the heat recovery device 5, the other end of the circulating liquid inlet pipe is connected with the outlet end of a heat exchange pipe on the air cooler 9 through a liquid return adjusting station 16, one end of the circulating liquid outlet pipe is connected with a first outlet on the heat recovery device 5, the other end of the circulating liquid outlet pipe is connected with the inlet end of the heat exchange pipe on the air cooler 9 through a liquid supply adjusting station 8, and the defrosting pump 7 is installed on the circulating liquid inlet pipe.
During defrosting, the secondary refrigerant in the secondary refrigerant circulating pipe exchanges heat with the refrigerant discharged by the compressor 1 through the heat recoverer 5, so that the secondary refrigerant enters the heat exchange pipe of the air cooler 9 after being heated, a frost layer on the outer wall of the heat exchange pipe is melted and removed, the refrigerant discharged by the compressor 1 exchanges heat and is cooled through the heat recoverer 5, and then enters the condenser 2 for condensation; because the temperature of the refrigerant entering the condenser is lower than the temperature of the refrigerant in the original normal work, the condensing temperature in the defrosting process is lower than the condensing temperature in the original normal work, the energy consumption of the compressor is reduced, the electric energy for electric defrosting, the electric energy for heating the secondary refrigerant and the defrosting water consumption for flushing the frost are saved, and the energy consumption for defrosting is directly saved.
The refrigerant circulating system comprises a compressor 1, a condenser 2 and an evaporator 4, wherein the compressor 1, the condenser 2 and the evaporator 4 are connected through a first pipeline to form a closed-loop circulating system, and a first valve 15 is arranged on the first pipeline between the compressor 1 and the condenser 2.
The compressor 1, the heat recoverer 5 and the condenser 2 are sequentially connected through a second pipeline, so that a refrigerant discharged from the compressor 1 enters the condenser 2 after heat exchange through the heat recoverer 5, and a second valve 12 is installed on the second pipeline.
The heat recovery device 5 is provided with a second inlet and a second outlet, the second inlet and the second outlet are communicated with a first pipeline between the compressor 1 and the condenser 2 through a second pipeline, and the first valve is installed on the first pipeline between the second inlet and the second outlet.
During defrosting, the working principle of the refrigerant circulating system is that the compressor 1 sucks air from the evaporator 4, the refrigerant is changed into high-temperature and high-pressure gas through boosting, the high-temperature and high-pressure gas discharged by the compressor 1 enters the heat recovery device 5 to exchange heat with low-temperature secondary refrigerant, high-temperature steam releases heat and cools, then the high-temperature steam is liquefied by the condenser 2 to be changed into high-pressure liquid refrigerant, the refrigerant is changed into low-temperature and low-pressure liquid through the throttle valve 3, enters the evaporator 4 to be subjected to heat absorption to be changed into low-pressure and low-temperature gas, and then the low-temperature and low-pressure liquid.
In the non-defrosting state, the compressor 1 sucks air from the evaporator 4, the refrigerant is changed into high-temperature and high-pressure gas through pressure boosting, the high-temperature and high-pressure gas discharged by the compressor 1 enters the condenser 2 to be condensed and liquefied into high-pressure liquid refrigerant, the refrigerant is changed into low-temperature and low-pressure liquid after passing through the throttle valve 3, enters the evaporator 4 to be absorbed and changed into low-pressure and low-temperature gas, and then the low-pressure and low-pressure gas is sucked into the compressor 1, so that the refrigerant.
The secondary refrigerant circulating system comprises a secondary refrigerant liquid supply pipe 13 and a secondary refrigerant liquid return pipe 14, one end of each of the secondary refrigerant liquid supply pipe 13 and the secondary refrigerant liquid return pipe 14 is connected with the evaporator 4, the other end of the secondary refrigerant liquid supply pipe 13 is connected with the inlet end of a heat exchange pipe in the air cooler 9 through a liquid supply adjusting station 8, and the other end of the secondary refrigerant liquid return pipe 14 is connected with the outlet end of the heat exchange pipe in the air cooler 9 through a liquid return adjusting station 16 so as to form a refrigerating cycle of the secondary refrigerant. And a coolant pump 6 is arranged on the coolant return pipe 14.
Specifically, one end of the coolant supply tube 13 is connected to a first outlet of the evaporator 4, and one end of the coolant return tube 14 is connected to a first inlet of the evaporator 4, so that coolant enters the evaporator 4 through the coolant return tube 14 for heat exchange and then flows into the coolant supply tube 13, thereby implementing refrigeration cycle.
The liquid supply adjusting station and the liquid return adjusting station comprise a plurality of liquid supply pipelines connected in parallel, and liquid supply valves are respectively installed on the plurality of liquid supply pipelines.
The inlet end and the outlet end of the heat exchange tube in the air cooler are communicated with the corresponding secondary refrigerant liquid return tube and the secondary refrigerant liquid supply tube through liquid supply pipelines. The secondary refrigerant circulating pipe is respectively communicated with the inlet end and the outlet end of the heat exchange pipe in the air cooler through a liquid supply pipeline.
The secondary refrigerant circulating pipe is respectively communicated with the inlet end and the outlet end of the heat exchange pipe in the air cooler 9 through a liquid supply pipeline. The air cooler 9 can be in a defrosting state or a refrigerating state by switching the liquid supply valves on the plurality of liquid supply pipelines.
In this embodiment, the number of air-cooler 9 is a plurality of, when the defrosting, can partly air-cooler 9 defrost, and another part continues to refrigerate, is guaranteeing under the prerequisite of freezer temperature, can defrost again, does not influence each other.
The utility model discloses a theory of operation: when the air cooler 9 is in a defrosting state, the first valve 15 is closed, the second valve 12 is opened, the defrosting pump 7 is started, the secondary refrigerant subjected to heat exchange in the heat exchange tube of the air cooler 9 is conveyed to the heat recoverer 5 by the defrosting pump 7, the secondary refrigerant is subjected to heat exchange with the refrigerant to heat the secondary refrigerant, the secondary refrigerant is heated, the heated secondary refrigerant flows back into the heat exchange tube on the air cooler 9 through the secondary refrigerant liquid outlet pipe 10 and the liquid supply regulating station to defrost the outer wall of the heat exchange tube, and the defrosted secondary refrigerant flows back into the secondary refrigerant liquid inlet pipe through the liquid return regulating station; when the air cooler 9 is in a refrigeration state, the first valve 15 is opened, the second valve 12 is closed, the defrosting pump 7 is closed, corresponding liquid supply valves on the liquid supply adjusting station and the liquid return adjusting station are adjusted, defrosting is stopped, the refrigeration state is recovered, the coolant pump 6 conveys coolant with high temperature in the coolant return pipe 14 into the evaporator 4, heat exchange is carried out between the coolant and the coolant to reduce the temperature, the coolant with low temperature flows back into the heat exchange pipe in the air cooler 9 through the coolant supply pipe 13 and the liquid supply adjusting station to exchange heat, and after heat exchange refrigeration, the temperature of the coolant rises and flows into the coolant return pipe 14 through the liquid return adjusting station to form coolant refrigeration cycle.
It will be understood by those skilled in the art that the invention, including any combination of the elements of the above description and the detailed description and illustrated in the accompanying drawings, is not limited to the details and should not be construed as limited to the embodiments set forth herein for the sake of brevity. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An indirect cooling system for defrosting by utilizing exhaust waste heat comprises a refrigerant circulating system and a secondary refrigerant circulating system, and is characterized in that: the device comprises a refrigerating medium circulating system and an air cooler, wherein the refrigerating medium circulating system is connected with the refrigerating medium circulating system to refrigerate the refrigerating medium, the refrigerating medium defrosting system comprises a heat recoverer and a refrigerating medium circulating pipe, the heat recoverer is connected with the refrigerating medium circulating pipe to enable the refrigerating medium in the refrigerating medium circulating pipe to exchange heat in the heat recoverer, one end of the refrigerating medium circulating pipe is communicated with the outlet end of a heat exchange pipe in the air cooler through a liquid return adjusting station, the other end of the refrigerating medium circulating pipe is communicated with the inlet end of the heat exchange pipe in the air cooler through a liquid supply adjusting station, and a defrosting pump is mounted on the refrigerating medium circulating pipe.
2. The indirect cooling system for defrosting using exhaust heat according to claim 1, wherein: the secondary refrigerant circulating pipe comprises a circulating liquid inlet pipe and a circulating liquid outlet pipe, one end of the circulating liquid inlet pipe is connected with a first inlet on the heat recovery device, the other end of the circulating liquid inlet pipe is connected with the outlet end of a heat exchange pipe on the air cooler through a liquid return adjusting station, one end of the circulating liquid outlet pipe is connected with a first outlet on the heat recovery device, the other end of the circulating liquid outlet pipe is connected with the inlet end of the heat exchange pipe on the air cooler through a liquid supply adjusting station, and the defrosting pump is installed on the circulating liquid inlet pipe.
3. The indirect cooling system for defrosting using exhaust heat according to claim 1, wherein: the refrigerant circulating system comprises a compressor, a condenser and an evaporator, the compressor, the condenser and the evaporator are connected through a first pipeline to form a closed-loop circulating system, and a first valve is installed on the first pipeline between the compressor and the condenser.
4. The indirect cooling system for defrosting using exhaust heat according to claim 3, wherein: the compressor, the heat recoverer and the condenser are sequentially connected through a second pipeline, so that a refrigerant discharged by the compressor enters the condenser after heat exchange through the heat recoverer, and a second valve is installed on the second pipeline.
5. The indirect cooling system for defrosting using exhaust heat according to claim 1, wherein: the secondary refrigerant circulating system comprises a secondary refrigerant liquid supply pipe and a secondary refrigerant liquid return pipe, one end of each of the secondary refrigerant liquid supply pipe and the secondary refrigerant liquid return pipe is connected with the evaporator, the other end of each of the secondary refrigerant liquid supply pipes is connected with the inlet end of a heat exchange pipe in the air cooler through a liquid supply adjusting station, and the other end of each of the secondary refrigerant liquid return pipes is connected with the outlet end of the heat exchange pipe in the air cooler through a liquid return adjusting station so as to form the refrigerating cycle of the secondary refrigerant.
6. The indirect cooling system for defrosting using exhaust heat according to claim 5, wherein: and a coolant pump is arranged on the coolant return pipe.
7. The indirect cooling system for defrosting using exhaust heat according to claim 1, wherein: the liquid supply adjusting station and the liquid return adjusting station comprise a plurality of liquid supply pipelines connected in parallel, and liquid supply valves are respectively installed on the plurality of liquid supply pipelines.
8. The indirect cooling system for defrosting using exhaust heat according to claim 7, wherein: the inlet end and the outlet end of the heat exchange tube in the air cooler are communicated with the corresponding secondary refrigerant liquid return tube and the secondary refrigerant liquid supply tube through liquid supply pipelines.
9. The indirect cooling system for defrosting using exhaust heat according to claim 8, wherein: the secondary refrigerant circulating pipe is respectively communicated with the inlet end and the outlet end of the heat exchange pipe in the air cooler through a liquid supply pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021808344.2U CN212962271U (en) | 2020-08-26 | 2020-08-26 | Indirect cooling system for defrosting by utilizing exhaust waste heat |
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| CN202021808344.2U CN212962271U (en) | 2020-08-26 | 2020-08-26 | Indirect cooling system for defrosting by utilizing exhaust waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945022A (en) * | 2021-11-12 | 2022-01-18 | 华商国际工程有限公司 | Refrigeration and defrosting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945022A (en) * | 2021-11-12 | 2022-01-18 | 华商国际工程有限公司 | Refrigeration and defrosting system |
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