CN218480794U - Large heat accumulating type defrosting air cooling system - Google Patents
Large heat accumulating type defrosting air cooling system Download PDFInfo
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- CN218480794U CN218480794U CN202222571609.7U CN202222571609U CN218480794U CN 218480794 U CN218480794 U CN 218480794U CN 202222571609 U CN202222571609 U CN 202222571609U CN 218480794 U CN218480794 U CN 218480794U
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Abstract
The utility model discloses a large-scale heat accumulation formula defrosting air-cooled system relates to the refrigeration plant field, which comprises a compressor, a condenser, the air-cooled evaporimeter, the export of compressor is linked together through the entry of pipeline with the condenser, the condenser entrance is provided with the first solenoid valve of control condenser switch, the export of condenser is linked together through the entry of pipeline with the air-cooled evaporimeter, the export of air-cooled evaporimeter is linked together through the entry of pipeline with the compressor, thereby form the circulation circuit of air-cooled system, and simultaneously, still be connected with heat accumulation jar and defrosting circulating pump on the circulation circuit, form heat accumulation circulation circuit and defrosting circulation circuit respectively, the heat accumulation mode and the defrosting mode that correspond the system, the refrigerant in the forced circulation air-cooled evaporimeter of heat accumulation defrosting mode messenger system when the defrosting, improve the surface heat transfer coefficient in the air-cooled evaporimeter, thereby the defrosting speed has been improved, the energy consumption is reduced, and then the operation cost of system has been reduced.
Description
Technical Field
The utility model relates to a refrigeration plant technical field, concretely relates to large-scale heat accumulation formula defrosting air-cooled system.
Background
When a traditional large air-cooled refrigeration system works, because the surface temperature of an evaporator is low, water vapor in the air can frost on the surface of the evaporator, a formed frost layer increases the heat transfer resistance of the evaporator, and the heat exchange coefficient of the evaporator is greatly reduced, therefore, how to quickly and effectively defrost and reduce the defrosting energy consumption is an important problem which needs to be solved urgently, most of the existing defrosting modes are electrothermal defrosting and hot-air bypass defrosting, although the electrothermal defrosting is quick, pipelines are simple, but the energy consumption is high, the temperature of a refrigerating chamber is easy to rise, although the hot-air bypass defrosting is more energy-saving than the electrothermal defrosting, the temperature of a shell of the compressor can rise, and the problem of wet compression of the compressor also exists, in addition, the electricity price policy of peak valley electricity is also an important factor of higher system operation cost.
Chinese patent publication No. CN114484910A discloses a bypass heating defrosting apparatus, a defrosting control method, a refrigeration system and a device, which reduce the heat loss of the system and improve the defrosting efficiency by providing a double evaporator and a hot gas bypass branch, but do not solve the problem of temperature rise of the compressor shell.
Chinese patent publication No. CN114485012A discloses an electromagnetic heating sublimation defrosting apparatus, a defrosting control method, a refrigeration system and a device, which adopt an electromagnetic heating principle, and realize efficient defrosting and reduce temperature fluctuation of a refrigeration chamber during defrosting by arranging a double evaporator and a forward and reverse rotation fan, but the essence of electromagnetic heating defrosting is still electrothermal defrosting, and the problem of high energy consumption still exists.
Chinese patent No. CN214701420U discloses a sublimation defrosting system, a refrigerating system, and a refrigerating apparatus, in which a semiconductor refrigerating sheet is provided to cool and dehumidify an evaporator chamber, and a humidity difference is used to achieve defrosting and defrosting with low energy consumption.
Chinese patent publication No. CN113048670B discloses a refrigeration system, a defrosting control method, and a refrigerator, in which an electric heating and vibration device is used to drop a frost layer on the surface of an evaporator, which is beneficial to improving defrosting efficiency and reducing energy consumption, but the movement of the vibration device causes vibration at the connection pipe of the evaporator, greatly reducing service life, and severely reducing reliability of the device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a large-scale heat accumulation formula defrosting air-cooled system aims at solving among the prior art defrosting inefficiency, and the energy consumption is higher, the technical problem that system's working costs is on the high side.
In order to solve the technical problem, the technical scheme of the utility model is that:
a large-scale heat accumulating type defrosting air-cooled system comprises a compressor, a condenser and an air-cooled evaporator, wherein an outlet of the compressor is communicated with an inlet of the condenser through a pipeline, a first electromagnetic valve for controlling the opening and closing of the condenser is arranged at the inlet of the condenser, an outlet of the condenser is communicated with an inlet of the air-cooled evaporator through a pipeline, and an outlet of the air-cooled evaporator is communicated with an inlet of the compressor through a pipeline, so that a circulation loop of the air-cooled system is formed; when the air-cooled evaporator needs defrosting, the first electromagnetic valve is closed, the compressor is stopped, the second electromagnetic valve is opened, the defrosting circulating pump is started, the defrosting mode is started, under the action of the defrosting circulating pump, a gaseous refrigerant pipeline enters the heat storage tank to absorb heat in the heat storage tank, a liquid refrigerant after heat absorption flows into the air-cooled evaporator through the pipeline to be evaporated and absorb heat, and the pipeline returns to the defrosting circulating pump after heat absorption to finish defrosting circulation; the heat storage defrosting mode enables the system to forcibly circulate the refrigerant in the air-cooled evaporator during defrosting, improves the surface heat transfer coefficient in the air-cooled evaporator, and compared with the traditional electric heating defrosting, the defrosting speed can be improved by more than 2 times, so that the defrosting speed is improved, the energy consumption is reduced, and the operation cost of the system is reduced.
In order to further improve the working efficiency of the system and enable the circulation loop of the system to run more stably, a compressor one-way valve for preventing the refrigerant from flowing back is arranged at the outlet of the compressor, a third electromagnetic valve for controlling the on-off of the defrosting circulation pump is arranged at the inlet of the defrosting circulation pump, a defrosting one-way valve for preventing the refrigerant from flowing back is arranged at the outlet of the defrosting circulation pump, and an electronic one-way expansion valve for throttling and reducing pressure is arranged at the inlet of the air-cooled evaporator, so that the working pressure of the system is further reduced.
In order to further realize energy saving and consumption reduction, and reduce the operation cost of the system, the utility model relates to a large-scale heat accumulating type defrosting air-cooled system, the utility model also comprises a cold accumulation tank, a gas-liquid separator and a cold accumulation circulating pump, the entry of the cold accumulation tank is communicated with the exit of an electronic one-way expansion valve through a pipeline, the entrance of the cold accumulation tank is provided with a fourth electromagnetic valve for controlling the switch of the cold accumulation tank, the exit of the cold accumulation tank is communicated with the entry of the gas-liquid separator through a pipeline, the exit of the gas-liquid separator is communicated with the entry of the cold accumulation circulating pump through a pipeline, the exit of the cold accumulation circulating pump is communicated with the exit of an air-cooled evaporator through a pipeline, a cold accumulation circulating loop and a cold consumption circulating loop are formed, when the temperature in the cold accumulation tank is higher than the set temperature, or the electricity consumption period is the low valley period, and when the evaporator does not need defrosting, the first electromagnetic valve, the fourth electromagnetic valve is opened, the second electromagnetic valve, the third electromagnetic valve is closed, the cold accumulation mode is started, at the moment, high-temperature and high-pressure gaseous refrigerant coming out of the compressor flows into the condenser through the pipeline to be condensed and released heat, then low-temperature and low-pressure liquid refrigerant is divided into two paths, one path of the low-temperature and low-pressure liquid refrigerant flows into the air-cooled evaporator to be evaporated and absorbed heat, the other path of the low-temperature and low-pressure liquid refrigerant flows into the cold accumulation tank through the pipeline to be condensed and absorbed heat, then the low-temperature and low-pressure liquid refrigerant is mixed with the refrigerant from the air-cooled evaporator through the pipeline and returns to the compressor to finish cold accumulation circulation, when the electricity consumption period is a peak period, the air-cooled evaporator does not need defrosting, when the temperature in the cold accumulation tank is below a set temperature, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are closed, the fourth electromagnetic valve is opened, the compressor is stopped, the cold accumulation circulating pump is started, the cold accumulation mode is started, the liquid refrigerant flows into the air-cooled evaporator through the pipeline to be evaporated and absorbed heat under the action of the cold accumulation circulating pump to release heat, after releasing heat, the refrigerant enters a gas-liquid separator through a pipeline for gas-liquid separation, and the separated liquid refrigerant returns to a cold accumulation circulating pump through a pipeline from the other end of the gas-liquid separator to complete cold consumption circulation.
In order to further improve the working efficiency of the system and ensure that the circulation loop of the system is more stable during operation, the outlet of the cold accumulation circulating pump is provided with a cold accumulation one-way valve for preventing the refrigerant from flowing back.
In order to further improve the system work efficiency, reduce the system pressure, the utility model relates to a large-scale heat accumulation formula defrosting air-cooled system still includes liquid storage pot and dry separator, the entry of liquid storage pot is linked together with the export of heat accumulation jar and the export of condenser respectively through the pipeline, the export of liquid storage pot is linked together through the entry of pipeline and drier-filter, drier-filter's export is linked together through the entry of pipeline and electron one-way expansion valve, when the system work, in order to adapt to the load change of air-cooled evaporator to the demand of liquid refrigerant, when the evaporation load of air-cooled evaporator increases, required liquid refrigerant liquid measure also increases, by the stock liquid supply of liquid storage pot; when the evaporation load of the air-cooled evaporator is reduced, the required liquid quantity of the liquid refrigerant is reduced, redundant liquid is stored in the liquid storage tank, and meanwhile, the drying filter filters visible dust and dust carried in the flowing process of the liquid refrigerant and absorbs residual moisture of the system, so that the system is free from dirt blockage and ice blockage.
To sum up, the utility model relates to a large-scale heat accumulation formula defrosting air-cooled system has reduced the defrosting energy consumption, has improved defrosting speed, has improved system work efficiency, reduces the working costs of system by a wide margin.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings:
fig. 1 is a schematic connection diagram of a first embodiment of a large heat accumulating type defrosting air-cooling system of the present invention;
fig. 2 is a schematic connection diagram of a second embodiment of a large heat accumulating type defrosting air-cooling system of the present invention;
fig. 3 is a schematic connection diagram of a third embodiment of the large heat accumulating type defrosting air-cooling system of the present invention;
fig. 4 is a schematic connection diagram of a fourth embodiment of the large heat accumulating type defrosting air-cooling system of the present invention;
in the figure, 1-compressor, 2-exhaust pipe, 3-press one-way valve, 4-electromagnetic valve I, 5-condenser, 6-liquid return pipe, 7-liquid storage tank, 8-liquid inlet pipe, 9-dry filter, 10-electronic one-way expansion valve, 11-air-cooled evaporator, 12-air return pipe, 13-heat storage air inlet pipe, 14-electromagnetic valve II, 15-heat storage tank, 16-heat storage liquid return pipe 16, 17-defrosting by-pass pipe, 18-electromagnetic valve III, 19-defrosting circulating pump, 20-defrosting one-way valve, 21-cold storage liquid inlet pipe, 22-electromagnetic valve IV, 23-cold storage tank, 24-cold storage air return pipe, 25-gas-liquid separator, 26-cold storage circulating pump, 27-cold storage one-way valve, 28-cold storage liquid return pipe.
Detailed Description
The present invention will be further described with reference to the accompanying fig. 1-4.
The position that involves in this specification all uses the utility model relates to a position when large-scale heat accumulation formula defrosting air-cooled system normally works is the standard, does not restrict its storage and the position when transporting, only represents relative position relation, does not represent absolute position relation.
The first embodiment is as follows:
as shown in fig. 1, a large heat accumulating type defrosting air-cooling system, includes a compressor 1, a condenser 5, an air-cooling evaporator 11, an outlet of the compressor 1 is communicated with an inlet of the condenser 5 through an exhaust pipe 2, an inlet of the condenser 5 is provided with a first electromagnetic valve 4 for controlling the switch of the condenser 5, an outlet of the condenser 5 is communicated with an inlet of the air-cooling evaporator 11 through a liquid inlet pipe 8, an outlet of the air-cooling evaporator 11 is communicated with an inlet of the compressor 1 through an air return pipe 12, thereby forming a circulation loop of the air-cooling system, and the circulation loop further includes a heat accumulation tank 15 and a defrosting circulation pump 19, an inlet of the heat accumulation tank 15 is communicated with an outlet of the compressor 1 through a heat accumulation air inlet pipe 13, a second electromagnetic valve 14 for controlling the on-off of the heat storage tank 15 is arranged at the inlet of the heat storage tank 15, the outlet of the heat storage tank 15 is communicated with the inlet of the air-cooled evaporator 11 through a heat storage liquid return pipe 16 to form a heat storage circulation loop, when the temperature in the heat storage tank is lower than a set temperature or the electricity consumption time period is a valley time period, the first electromagnetic valve 4 is closed, the second electromagnetic valve 14 is opened, the heat storage mode is opened, high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 1 flows into the heat storage tank 15 through a heat storage air inlet pipe 13 to be condensed and absorb heat, the liquid refrigerant absorbing heat flows into the air-cooled evaporator 11 through the heat storage liquid return pipe 16, and finally returns to the compressor 1 from the air-cooled evaporator 11 through a gas return pipe 12 to complete the heat storage circulation; an inlet of a defrosting circulating pump 19 is communicated with an outlet of the air-cooled evaporator 11 through a defrosting by-pass pipe 17, an outlet of the defrosting circulating pump 19 is communicated with an inlet of a heat storage tank 15 through the defrosting by-pass pipe 17 to form a defrosting circulating loop, when the air-cooled evaporator 11 needs defrosting, a first electromagnetic valve 4 is closed, a compressor 1 is stopped, a second electromagnetic valve 14 is opened, the defrosting circulating pump 19 is started, a defrosting mode is opened, a gaseous refrigerant pipeline enters the heat storage tank 15 under the action of the defrosting circulating pump 19, heat is absorbed in the heat storage tank 15, liquid refrigerants after heat absorption flow into the air-cooled evaporator 11 through a heat storage liquid return pipe 16 to be evaporated and absorbed, the liquid refrigerants after heat absorption flow back to the defrosting circulating pump 19 through the defrosting by-pass pipe 17 to complete defrosting circulation, and the defrosting mode is closed after a frost layer on the surface of the air-cooled evaporator 11 is completely removed; the heat storage defrosting mode enables the system to forcibly circulate the refrigerant in the air-cooled evaporator during defrosting, improves the surface heat transfer coefficient in the air-cooled evaporator, and compared with the traditional electric heating defrosting, the defrosting speed can be improved by more than 2 times, so that the defrosting speed is improved, the energy consumption is reduced, and the operation cost of the system is reduced.
Further, the utility model relates to a large-scale heat accumulation formula defrosting air-cooled system's compressor 1's exit is provided with the press check valve 3 that prevents the refrigerant backward flow, defrosting circulating pump 19's entrance is provided with the third solenoid valve 18 of control defrosting circulating pump 19 switch, defrosting circulating pump 19's exit is provided with the defrosting check valve 20 that prevents the refrigerant backward flow, the entrance of air-cooled evaporator 11 is provided with the electron one-way expansion valve 10 of throttle step-down, system operating pressure has further been reduced, when the defrosting mode is opened, third solenoid valve 18 is opened simultaneously, in order to guarantee the high-efficient operation of defrosting circulation circuit.
The second embodiment:
the difference between the present embodiment and the first embodiment is that, as shown in fig. 2, the present invention further includes a cold storage tank 23, a gas-liquid separator 25 and a cold storage circulating pump 26, an inlet of the cold storage tank 23 is communicated with an outlet of the electronic one-way expansion valve 10 through a cold storage liquid inlet pipe 21, an inlet of the cold storage tank 23 is provided with a fourth electromagnetic valve 22 for controlling the on/off of the cold storage tank 23, an outlet of the cold storage tank 23 is communicated with an inlet of the gas-liquid separator 25 through a cold storage liquid return pipe 28, an outlet of the gas-liquid separator 25 is communicated with an inlet of the cold storage circulating pump 26 through a cold storage liquid return pipe 28, an outlet of the cold storage circulating pump 26 is communicated with an outlet of the air-cooled evaporator 11 through a cold storage liquid return pipe 28, to form a cold storage circulating loop and a cold consumption circulating loop, when the temperature in the cold storage tank 23 is higher than a set temperature, or when the electricity consumption period is a low valley period, and the air-cooled evaporator 11 does not need defrosting, the first electromagnetic valve 4, the fourth electromagnetic valve 22 is opened, the second electromagnetic valve 14, the third electromagnetic valve 18 is closed, when the high-temperature of the high-pressure gas refrigerant coming from the compressor 1, the condenser 2 flows into the condenser 5, the condenser, the low-temperature condenser, the evaporator 11 returns to the evaporator, the evaporator 11, the evaporator 14 is closed, the high-temperature evaporator is set by the high-temperature evaporator, the high-temperature evaporator 21, compressor 1 stops the machine, cold-storage circulating pump 19 starts, the cold-consuming mode is opened, liquid refrigerant is under cold-storage circulating pump 19's effect, return liquid pipe 28 through the cold-storage and flow into air-cooled evaporimeter 11 and evaporate the heat absorption, flow into cold-storage jar 23 through cold-storage feed liquor pipe 21 after the heat absorption and release heat, it carries out gas-liquid separation to enter into vapour and liquid separator 25 through cold-storage muffler 24 again after releasing heat, liquid refrigerant after the separation returns liquid circulating pump 29 through cold-storage liquid pipe 28 from vapour and liquid separator 25's the other end through the cold-storage and returns and accomplishes the cold circulation that consumes, thereby makes the utility model relates to a large-scale heat accumulation formula defrosting air-cooled system further realizes energy saving and consumption reduction, the working costs of reduction system.
Further, the utility model relates to a large-scale heat accumulation formula defrosting air cooling system's cold-storage circulating pump 26's exit is provided with the cold-storage check valve 27 that prevents the refrigerant backward flow, makes cold-storage circulation circuit and consumes the better operation of cold circulation circuit to further improve system work efficiency.
Example three:
the difference between the first embodiment and the second embodiment is that, as shown in fig. 3, the first embodiment further includes a liquid storage tank 7 and a dry separator 9, the liquid storage tank 7 is disposed between the condenser 5 and the electronic one-way expansion valve 10, an inlet of the liquid storage tank 7 is communicated with an outlet of the condenser 5 through a liquid return pipe 6, one end of a heat storage liquid return pipe 16 is communicated with the liquid return pipe 6, an outlet of the liquid storage tank 7 is communicated with an inlet of the dry filter 9 through a liquid inlet pipe 8, and an outlet of the dry filter 9 is communicated with an inlet of the electronic one-way expansion valve 10 through a liquid inlet pipe 8, when the system works, in order to meet the demand of the load change of the air-cooled evaporator 11 for the liquid refrigerant, when the evaporation load of the air-cooled evaporator 11 is increased, the amount of the liquid refrigerant required is also increased, and is supplied by the liquid storage of the liquid storage tank 7; when the evaporation load of the air-cooled evaporator 11 becomes smaller, the amount of liquid refrigerant required becomes smaller, and the redundant liquid is stored in the liquid storage tank 7, so that the pressure of the system is effectively reduced, the working efficiency is improved, meanwhile, the drying filter 9 filters out visible dust and dust carried in the flowing process of the liquid refrigerant and absorbs the residual moisture in the system, the system is free from dirt blockage and ice blockage faults, the heat storage circulation loop and the defrosting circulation loop of the system are more stable in operation, the working efficiency of the system is further improved, the pressure of the system is reduced, and energy conservation and consumption reduction are better realized.
Example four:
further, as shown in fig. 4, the difference between the second embodiment and the second embodiment lies in that the second embodiment further includes a liquid storage tank 7 and a dry separator 9, and the connection mode and the working principle are the same as those of the third embodiment, so that the operation of the cold storage circulation loop is more stable, thereby reducing the working pressure of the heat storage type and cold storage type air cooling system, reducing the system failure, further improving the working efficiency, and further reducing the operating cost of the system of the large heat storage type defrosting air cooling system.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (5)
1. The utility model provides a large-scale heat accumulation formula defrosting air-cooled system, includes compressor, condenser, air-cooled evaporimeter, the export of compressor is linked together through the entry of pipeline with the condenser, the entry of condenser is provided with first solenoid valve, the export of condenser pass through the pipeline with the entry of air-cooled evaporimeter is linked together, the export of air-cooled evaporimeter pass through the pipeline with the entry of compressor is linked together its characterized in that: still include heat accumulation jar and defrosting circulating pump, the heat accumulation jar entry pass through the pipeline with the compressor export is linked together, heat accumulation jar entrance is provided with the second solenoid valve, the export of heat accumulation jar pass through the pipeline with the entry of forced air cooling evaporimeter is linked together, the entry of defrosting circulating pump pass through the pipeline with the export of forced air cooling evaporimeter is linked together, the export of defrosting circulating pump pass through the pipeline with the entry of heat accumulation jar is linked together.
2. A large heat accumulating defrosting air-cooling system according to claim 1, characterized in that: the defrosting device is characterized in that a compressor one-way valve is arranged at an outlet of the compressor, a third electromagnetic valve is arranged at an inlet of the defrosting circulating pump, a defrosting one-way valve is arranged at an outlet of the defrosting circulating pump, and an electronic one-way expansion valve is arranged at an inlet of the air-cooled evaporator.
3. A large heat accumulating defrosting air-cooling system according to claim 2, characterized in that: still include cold storage tank, vapour and liquid separator and cold-storage circulating pump, the entry of cold storage tank is linked together through the export of pipeline with the one-way expansion valve of electron, the entrance of cold-storage pipe is provided with the fourth solenoid valve of control cold storage tank switch, the export of cold storage tank is linked together through the entry of pipeline with vapour and liquid separator, the export of vapour and liquid separator is linked together through the entry of pipeline with the cold-storage circulating pump, the export of cold-storage circulating pump is linked together through the export of pipeline with the forced air cooling evaporimeter.
4. A large heat accumulating defrosting air cooling system according to claim 3, characterized in that: and a cold accumulation one-way valve for preventing the refrigerant from flowing back is arranged at the outlet of the cold accumulation circulating pump.
5. A large heat accumulating type defrosting air-cooling system according to any one of claims 1 to 4, characterized in that: the heat storage device is characterized by further comprising a liquid storage tank and a drying separator, wherein an inlet of the liquid storage tank is communicated with an outlet of the heat storage tank and an outlet of the condenser through pipelines respectively, an outlet of the liquid storage tank is communicated with an inlet of a drying filter through a pipeline, and an outlet of the drying filter is communicated with an inlet of the electronic one-way expansion valve through a pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222571609.7U CN218480794U (en) | 2022-09-28 | 2022-09-28 | Large heat accumulating type defrosting air cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222571609.7U CN218480794U (en) | 2022-09-28 | 2022-09-28 | Large heat accumulating type defrosting air cooling system |
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| CN218480794U true CN218480794U (en) | 2023-02-14 |
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| CN202222571609.7U Active CN218480794U (en) | 2022-09-28 | 2022-09-28 | Large heat accumulating type defrosting air cooling system |
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