CN217929282U - Semi-closed piston type air-cooled compression condensing unit with defrosting function for low-temperature refrigeration house - Google Patents
Semi-closed piston type air-cooled compression condensing unit with defrosting function for low-temperature refrigeration house Download PDFInfo
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- CN217929282U CN217929282U CN202221884327.6U CN202221884327U CN217929282U CN 217929282 U CN217929282 U CN 217929282U CN 202221884327 U CN202221884327 U CN 202221884327U CN 217929282 U CN217929282 U CN 217929282U
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Abstract
The utility model relates to a from low temperature freezer of taking defrosting function is with partly sealing piston air-cooled compression condensation unit, including compressor, oil separator, four-way reversing valve, air-cooler, cistern, air-cooled condenser and vapour and liquid separator, the compressor links to each other with oil separator, oil separator links to each other with the four-way reversing valve, the four-way reversing valve links to each other with vapour and liquid separator, air-cooled condenser, air-cooler respectively, vapour and liquid separator links to each other with the compressor, the air-cooled condenser links to each other with air-cooler, cistern respectively, the cistern links to each other with the air-cooler. The utility model discloses can be through the heating cycle of defrosting four-way reversing valve of automatic control of defrosting pressure value with the settlement of defrosting time, realize the defrosting of air-cooler internal and external surface, safe energy-conservation to the outer surface frosting problem in the air-cooler for the low temperature freezer has been solved.
Description
Technical Field
The utility model relates to an air-cooled compression condensing unit especially relates to a low temperature freezer from taking defrosting function is with partly sealing piston air-cooled compression condensing unit.
Background
The temperature of a common low-temperature refrigeration house is below-25 ℃, and the evaporation temperature of an air cooler is below-35 ℃, so that an air-cooled compression condensing unit is required to work under a low-temperature working condition, when the unit works under the low-temperature working condition, the inner surface and the outer surface of the air cooler frost, and the working efficiency of the unit is reduced if the unit is not defrosted in time.
At present, most of defrosting of an air cooler adopts water defrosting and electric heating defrosting. The defrosting operation time is long by adopting water, secondary ice blockage can be caused if defrosting water is not discharged in time, and unsafe factors can exist if electric heating defrosting is adopted, so that the energy consumption is high, energy is not saved, and the energy is saved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an energy-conserving, safe, do not receive the defrosting device of use restriction, solve the interior external surface problem of frosting of air-cooler for the low temperature freezer.
The utility model discloses a realize through following technical scheme:
the utility model provides a from low temperature freezer of taking defrosting function is with half piston air-cooled compression condensing unit, includes compressor, oil separator, four-way reversing valve, air-cooler, cistern, air-cooled condenser and vapour and liquid separator, the compressor links to each other with the oil separator, the oil separator links to each other with four-way reversing valve, four-way reversing valve links to each other with vapour and liquid separator, air-cooled condenser, air-cooler respectively, vapour and liquid separator links to each other with the compressor, air-cooled condenser links to each other with air-cooler, cistern respectively, the cistern links to each other with the air-cooler.
Preferably, the compressor is a semi-hermetic piston compressor.
In order to set defrosting pressure conveniently, a needle valve, a pressure controller and a defrosting pressure switch are arranged on a pipeline between the compressor and the gas-liquid separator; and a high-pressure gauge is arranged on a pipeline between the compressor and the oil separator.
In order to control the opening and closing and the flow direction of each connecting pipeline conveniently, a first one-way valve is arranged between the outlet of the water accumulation tray defrosting pipe of the air cooler and the inlet bypass pipeline of the liquid dividing head of the air inlet cooler; a liquid outlet valve, a filter, an electromagnetic valve, a thermal expansion valve and a second one-way valve are arranged on an air inlet pipeline between the liquid reservoir and the air cooler; a third one-way valve is arranged on the air return pipeline between the air cooler and the liquid reservoir; a fourth one-way valve is arranged on a pipeline between the air-cooled condenser and the liquid reservoir; a fifth one-way valve is arranged on a pipeline between the air-cooled condenser and the air cooler; and a sixth one-way valve is arranged on a pipeline between the four-way reversing valve and the air cooler.
Compared with the prior art, the utility model adopts the above technical scheme, have following technological effect: the semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigeration house can automatically control the heating cycle of the defrosting four-way reversing valve and the setting of the defrosting time through the defrosting pressure value, defrosting of the inner surface and the outer surface of the air cooler is achieved, safety and energy conservation are achieved, and therefore the problem that the inner surface and the outer surface of the air cooler for the low-temperature refrigeration house are frosted is solved.
Drawings
Fig. 1 is the structure schematic diagram of the utility model discloses a low temperature freezer from area defrosting function is with partly sealing piston forced air cooling compression condensing unit.
Detailed Description
The following description of the preferred embodiments of the present invention will be provided with reference to the accompanying drawings, so that the advantages and features of the present invention can be easily understood by those skilled in the art, and the scope of the present invention can be clearly and clearly defined.
As shown in fig. 1, the semi-closed piston type air-cooled compression condensing unit for the low-temperature refrigerator with the defrosting function comprises a compressor 16, an oil separator 14, a four-way reversing valve 12, an air cooler 1, a liquid reservoir 7, an air-cooled condenser 11 and a vapor-liquid separator 21.
The compressor 16 is a semi-closed piston type compressor, the model is 4NES-20Y, the outlet end of the compressor 16 is connected with the inlet end of the oil separator 14, the inlet end of the compressor 16 is connected with the outlet end of the gas-liquid separator 21, a needle valve 17, a pressure controller 19 and a defrosting pressure switch 20 are sequentially arranged on a connecting pipeline of the compressor, the model of the defrosting pressure switch 20 is KP1, the model of the pressure controller 19 is PS2-L7A, the outlet end of the compressor 16 is connected with the inlet end of the oil separator 14, and a high-pressure gauge 15 is arranged on the connecting pipeline. The pressure setting value of the pressure controller 19 is 0.075MP, and when the suction air of the unit reaches 0.075MP, the heating defrosting cycle is automatically converted; after the unit defrosts for 5 minutes, the four-way reversing valve 12 is closed to heat and defrosted the circulation, and the unit automatically converts into the refrigeration circulation.
The outlet end of the oil separator 14 is connected with the inlet end of the four-way reversing valve 12 through an exhaust pipe 13.
The four-way reversing valve 12 is DSF-70B in model, and three outlets of the four-way reversing valve are respectively connected with the gas-liquid separator 21, the air-cooled condenser 11 and the air cooler 1. And a sixth one-way valve 23 is arranged on a pipeline between the four-way reversing valve 12 and the air cooler 1.
The air cooler 1 is respectively connected with the liquid receiver 7 and the air-cooled condenser 11. Be provided with first check valve 2 between the import bypass line of the ponding dish defrosting pipe export of air-cooler 1 and the 1 minute liquid head of air-cooler, air intake pipe between 7 of cistern and the air-cooler 1 has set gradually out liquid valve 6, filter 5, solenoid valve 18, thermal expansion valve 22 and second check valve 3 on the road, is provided with third check valve 4 on the air return pipe between 1 of air-cooler and the cistern 7, is provided with fifth check valve 9 on the pipeline between the export of thermal expansion valve 22 and the export of air-cooled condenser 11, be provided with fourth check valve 8 on the pipeline between air-cooled condenser 11 and the cistern 7. Wherein, the type of the thermostatic expansion valve 22 is TGES5, and the type of the electromagnetic valve 18 is 200RB7T7T.
The air-cooled condenser 11 is a finned air-cooled condenser and is provided with a condensing fan 10, and the air-cooled condenser 11 is respectively connected with a four-way reversing valve 12, a liquid reservoir 7 and the air cooler 1.
High-pressure superheated steam discharged from the exhaust side of the compressor 16 enters the air-cooled condenser 11 through the four-way reversing valve 12, is condensed into high-pressure supercooled liquid by discharging heat into air through the condensing fan 10, enters the liquid receiver 7 through the fourth one-way valve 8, passes through the drying filter 5, is dried and filtered, flows through the system solenoid valve 18 and the thermostatic expansion valve 22, is subjected to throttling expansion action to form a low-pressure refrigerant mixture of vapor phase and liquid phase, enters the cold storage air cooler 1, absorbs heat in the cold storage and is evaporated into low-pressure superheated steam, then returns to the suction side of the compressor 16 through the four-way reversing valve 12 and the vapor-liquid separator 21, is compressed to work into high-pressure superheated steam, and is discharged through the exhaust side, and the process is repeated. The heat in the cold storage is taken away, the temperature is reduced, and the purpose of refrigeration is achieved.
When the pressure value of the unit defrosting pressure switch 20 is lower than 0.075MPa, the defrosting pressure switch 20 sends an action signal to the four-way reversing valve 12, the four-way reversing valve 12 switches the heating circulation state, the air cooler fan 24 is closed, high-pressure superheated steam discharged from the exhaust side of the compressor 16 enters the cold air blower 1 in the freezer through the four-way reversing valve 12 to rapidly melt the surface frost layer of the cold air blower, the high-pressure superheated steam discharged from the air cooler is condensed into high-pressure subcooled liquid, enters the air-cooled condenser 11 through the second one-way valve 3 and the fifth one-way valve 9, and then returns to the air suction side of the compressor through the four-way reversing valve 12 and the vapor-liquid separator 21. After the unit defrosts for 5 minutes, the fan of the air cooler 1 is started and the four-way reversing valve 12 is switched to the refrigerating state again, and the unit is automatically switched to the refrigerating cycle.
Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a from low temperature freezer of taking defrosting function is with half piston forced air cooling compression condensing unit which characterized in that: the air-cooled compressor comprises a compressor, an oil separator, a four-way reversing valve, an air cooler, a liquid reservoir, an air-cooled condenser and a vapor-liquid separator, wherein the compressor is connected with the oil separator, the oil separator is connected with the four-way reversing valve, the four-way reversing valve is respectively connected with the vapor-liquid separator, the air-cooled condenser and the air cooler, the vapor-liquid separator is connected with the compressor, the air-cooled condenser is respectively connected with the air cooler and the liquid reservoir, and the liquid reservoir is connected with the air cooler.
2. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 1, wherein the semi-closed piston type air-cooled compression condensing unit comprises: the compressor is a semi-sealed piston compressor.
3. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 2, wherein the semi-closed piston type air-cooled compression condensing unit comprises: and a needle valve, a pressure controller and a defrosting pressure switch are arranged on a pipeline between the compressor and the gas-liquid separator.
4. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 3, wherein the semi-closed piston type air-cooled compression condensing unit comprises: and a high-pressure gauge is arranged on a pipeline between the compressor and the oil separator.
5. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 1, wherein the semi-closed piston type air-cooled compression condensing unit comprises: a first one-way valve is arranged between an outlet of the water accumulation disk defrosting pipe of the air cooler and an inlet bypass pipeline of the liquid dividing head of the air cooler.
6. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 1, wherein the semi-closed piston type air-cooled compression condensing unit comprises: and a liquid outlet valve, a filter, an electromagnetic valve, a thermal expansion valve and a second one-way valve are arranged on the air inlet pipeline between the liquid reservoir and the air cooler.
7. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 6, wherein the semi-closed piston type air-cooled compression condensing unit comprises: and a third one-way valve is arranged on an air return pipeline between the air cooler and the liquid reservoir.
8. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 1, wherein the semi-closed piston type air-cooled compression condensing unit comprises: and a fourth one-way valve is arranged on a pipeline between the air-cooled condenser and the liquid reservoir.
9. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 1, wherein the semi-closed piston type air-cooled compression condensing unit comprises: and a fifth one-way valve is arranged on a pipeline between the air-cooled condenser and the air cooler.
10. The semi-closed piston type air-cooled compression condensing unit with the defrosting function for the low-temperature refrigerator according to claim 1, wherein the semi-closed piston type air-cooled compression condensing unit comprises: and a sixth one-way valve is arranged on a pipeline between the four-way reversing valve and the air cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221884327.6U CN217929282U (en) | 2022-07-21 | 2022-07-21 | Semi-closed piston type air-cooled compression condensing unit with defrosting function for low-temperature refrigeration house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221884327.6U CN217929282U (en) | 2022-07-21 | 2022-07-21 | Semi-closed piston type air-cooled compression condensing unit with defrosting function for low-temperature refrigeration house |
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| CN217929282U true CN217929282U (en) | 2022-11-29 |
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| CN202221884327.6U Active CN217929282U (en) | 2022-07-21 | 2022-07-21 | Semi-closed piston type air-cooled compression condensing unit with defrosting function for low-temperature refrigeration house |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379523A (en) * | 2023-04-03 | 2023-07-04 | 南京五洲制冷集团有限公司 | Runner dehumidification air conditioning unit of integrated high temperature heat pump regeneration |
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2022
- 2022-07-21 CN CN202221884327.6U patent/CN217929282U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379523A (en) * | 2023-04-03 | 2023-07-04 | 南京五洲制冷集团有限公司 | Runner dehumidification air conditioning unit of integrated high temperature heat pump regeneration |
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