TWM517808U - Multi-stages refrigeration system using multi-cavities evaporator - Google Patents

Description

Multi-refrigeration system using multi-cavity evaporator

The present invention relates to a refrigeration system, and more particularly to a multiple refrigeration system using a multi-chamber evaporator.

Referring to Figure 1, the conventional one-unit refrigeration system includes a compressor 11, a condenser 12 connected to the compressor 11, an expansion valve 13 connected to the condenser 12, and an evaporation connecting the expansion valve 13 and the compressor 11. 14.

The gas refrigerant 101 pressurized to the high temperature and high pressure by the compressor 11 is cooled by the condenser 12 to become a liquid refrigerant 102 at normal temperature and high pressure, and the liquid refrigerant 102 at normal temperature and high pressure is passed through the expansion valve 13 to become a low temperature and low pressure liquid refrigerant 103, low temperature and low pressure. The liquid refrigerant 103 is absorbed by the evaporator 14 to become a low-temperature low-pressure gaseous refrigerant 104 and then flows to the compressor 11. The existing one-way refrigeration system is widely used in air conditioning systems and refrigeration systems. Although the cooling effect can be achieved, the application surface is indirect cooling. The cooling temperature is between 10 ° C and 30 ° C. When a cryogenic refrigeration system is required, it needs to be used instead. Binary refrigeration system.

Referring to FIG. 2, a conventional binary refrigeration system includes a liquefaction unit 15 and a cooling unit 16. The liquefaction unit 15 includes a liquefaction compressor 151, a liquefaction condenser 152 connected to the liquefaction compressor 151, and a continuous connection. A liquefaction expansion valve 153 connected to the liquefaction condenser 152, and a heat exchanger 154 connecting the liquefaction expansion valve 153 and the liquefaction compressor 151. The cooling unit 16 includes a cooling compressor 161 connected to the heat exchanger 154, a cooling expansion valve 162 connected to the heat exchanger 154, and a cooling evaporator 163 connecting the cooling expansion valve 162 and the cooling compressor 161. .

The liquefaction unit 15 is a refrigerant 105 that can be liquefied at a high pressure and normal temperature using, for example, R404A or R507, and the cooling unit 16 is a refrigerant 106 that cannot be liquefied at a high pressure and normal temperature, for example, using R23. The refrigerant 105 is liquefied by the refrigerant 105 of the liquefaction unit 15, so that the refrigerant 106 of the cooling unit 16 can be liquefied so that the cooling temperature can be about -85 °C.

The existing one-unit refrigeration system and the binary refrigeration system are independent systems. Therefore, if there is a wide-temperature domain cooling demand, the existing method must have both a one-unit refrigeration system and a binary refrigeration system, not only the production cost and subsequent maintenance. The cost is high, and it takes up space. How to achieve the cooling demand in the wide temperature range in one system, and reduce the cost and reduce the space waste, has become the target of the relevant industry.

Therefore, the object of the present invention is to provide a multi-frozen refrigeration system with a multi-cavity evaporator that has a wide temperature range application environment and can reduce cost and space waste.

Thus, the novel multi-refrigeration system using a multi-chamber evaporator includes a first cooling device, a second cooling device, and a cycle switching device. The first cooling device includes a first compressor, a condenser, a first controller, a multi-cavity evaporator, and a first compressor, a first cooling circuit of the condenser, the first controller and the multi-chamber evaporator and having a first refrigerant, the multi-cavity evaporator having a first cooling flow for connecting the first cooling pipe And a second cooling flow path independent of the first cooling flow path and not communicating with each other.

The second cooling device includes a second compressor, a first heat exchanger, and a second cooling flow passage connecting the second compressor, the first heat exchanger and the multi-cavity evaporator Cool the piping.

The cycle switching device includes a first switching unit, the first switching unit has a first switching mechanism installed between the condenser and the first controller, and a first switching mechanism a switching mechanism, a first circulation line of the first heat exchanger and the first compressor, and a first stage connected between the first switching mechanism and the first heat exchanger a cycle controller, the first switching mechanism is switchable between a first cooling position and a second cooling position, and when the first switching mechanism is in the first cooling position, the first refrigerant is subjected to the first cooling The pipeline and the first controller flow to the first cooling flow passage of the multi-chamber evaporator, and when the first switching mechanism is in the second cooling position, the first refrigerant is used by the first circulation pipeline The first cycle controller flows to the first compressor.

The utility of the present invention is to utilize a multi-cavity evaporator having first cooling channels and second cooling channels that are independent of each other and not in communication with each other, and cooperate with the first switchable between the first cooling position and the second cooling position. The switching mechanism enables the multi-refrigeration system to simultaneously have the cooling capacity of the unary and binary refrigeration systems, thereby reducing costs and reducing space waste.

2‧‧‧First cooling device

21‧‧‧First compressor

22‧‧‧Condenser

23‧‧‧First controller

24‧‧‧Multi-cavity evaporator

241‧‧‧First cooling runner

242‧‧‧Second cooling runner

243‧‧‧ Third cooling runner

25‧‧‧First cooling line

26‧‧‧First Auxiliary Unit

261‧‧‧First oil separator

262‧‧‧First high voltage meter

263‧‧‧First reservoir

264‧‧‧First Dry Filter

3‧‧‧Second cooling device

31‧‧‧Second compressor

32‧‧‧First heat exchanger

33‧‧‧Second cooling line

34‧‧‧Second auxiliary unit

341‧‧‧Second oil and gas separator

342‧‧‧Second high pressure gauge

343‧‧‧Second reservoir

344‧‧‧Second drying filter

35‧‧‧Second controller

4‧‧‧Cycle switching device

41‧‧‧First switching unit

411‧‧‧First switching mechanism

412‧‧‧First circulation line

413‧‧‧First Cycle Controller

42‧‧‧Second switching unit

421‧‧‧Second switching mechanism

422‧‧‧Second circulation line

423‧‧‧Second cycle controller

5‧‧‧ Third cooling device

51‧‧‧ Third compressor

52‧‧‧second heat exchanger

53‧‧‧ Third cooling line

54‧‧‧ third auxiliary unit

541‧‧‧ Third Oil and Gas Separator

542‧‧‧ Third high voltage meter

543‧‧‧ third reservoir

544‧‧‧The third drying filter

200‧‧‧First refrigerant

201‧‧‧Second refrigerant

202‧‧‧ Third refrigerant

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a schematic view showing a state of a conventional one-unit refrigeration system; FIG. 2 is a schematic view showing a conventional one Figure 3 is a system diagram illustrating a first embodiment of the novel multi-vessel refrigeration system employing a multi-chamber evaporator, wherein the first switching mechanism is in a first cooling position; a system diagram illustrating the first switching mechanism of the first embodiment in a second cooling position; and FIG. 5 is a system diagram illustrating a second embodiment of the novel multi-frozen system employing a multi-chamber evaporator, wherein The second switching mechanism is in a third cooling position; and FIG. 6 is a system diagram illustrating a second embodiment of the present invention, wherein the second switching mechanism is in a fourth cooling position.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 3, a first embodiment of the novel multi-refrigeration system using a multi-chamber evaporator includes a first cooling device 2, a second cooling device 3, and a first cooling device 2 and the second cooling device. The cycle switching device 4 of the device 3.

The first cooling device 2 includes a first compressor 21, a condenser 22, a first controller 23, a multi-chamber evaporator 24, a first compressor 21, a condenser 22, and a first cooling unit a controller 23 and the multi-cavity The body evaporator 24 is circulated with a first cooling line 25 of a first refrigerant 200 liquefiable at a high pressure normal temperature, and a first auxiliary unit 26 mounted to the first cooling line 25.

In the embodiment, the first refrigerant 200 is R507 refrigerant, and the first controller 23 is a capillary for reducing and cooling the first refrigerant 200. In practical applications, the first controller 23 can also be used. It is an expansion valve that still achieves the same effect.

The multi-cavity evaporator 24 has a first cooling flow path 241 for connecting the first cooling circuit 25, and a second cooling flow path 242 which is independent of the first cooling flow path 241 and does not communicate with each other. .

The first auxiliary unit 26 has a first oil separator 261 mounted on the first cooling line 25 and connected to the first compressor 21, and is mounted on the first cooling line 25 and connected to the first oil and gas separation. And a first high pressure gauge 262 of the condenser 22, a first accumulator 263 mounted to the first cooling duct 25 and connected to the condenser 22, and a first cooling duct 25 A first drying filter 264 of the first reservoir 263 is connected. The first oil separator 261 can separate the lubricating oil of the first compressor 21 from the first refrigerant 200, and the first accumulator 263 can separate the first refrigerant 200 in the gaseous state from the first refrigerant 200 in the liquid state and store the liquid state. A refrigerant 200, and the first drying filter 264 can dry the moisture or moisture in the first refrigerant 200 and filter possible impurities.

The second cooling device 3 includes a second compressor 31, a first heat exchanger 32, a second cooling connected to the second compressor 31, the first heat exchanger 32 and the multi-chamber evaporator 24. Second cooling tube of flow channel 242 The road 33 and a second auxiliary unit 34 mounted to the second cooling duct 33. A second refrigerant 201 that cannot be liquefied at a high pressure and normal temperature flows through the second cooling line 33. In this embodiment, the second refrigerant 201 is an R23 refrigerant.

The second auxiliary unit 34 includes a second oil separator 341 installed in the second cooling line 33 and communicating with the second compressor 31, and is mounted on the second cooling line 33 and connected to the second oil and gas separation. And a second high pressure gauge 342 of the first heat exchanger 32, a second accumulator 343 connected to the second cooling duct 33 and connected to the first heat exchanger 32, and a second reservoir 343 The second cooling line 33 is connected to the second reservoir 343 and the second drying filter 344 of the second cooling channel 242 of the multi-chamber evaporator 24. The functions of the second oil separator 341, the second reservoir 343 and the second drying filter 344 are similar to the first oil separator 261, the first reservoir 263 and the first drying filter 264, respectively. I will not repeat them here.

The cycle switching device 4 includes a first switching unit 41 connected to the condenser 22. The first switching unit 41 has a first cooling circuit 25 installed between the first drying filter 264 and the first a first switching mechanism 411 between the controllers 23, a first switching mechanism 411 connected to the first switching mechanism 411, the first heat exchanger 32 and the first circulation line 412 of the first compressor 21, and a first cycle A conduit 412 and a first circulation controller 413 between the first switching mechanism 411 and the first heat exchanger 32.

In the embodiment, the first switching mechanism 411 is a three-hole three-way solenoid valve, and the first circulation controller 413 is a capillary tube for stepping down and cooling the first refrigerant 200. In practical applications, The first circulation controller 413 can also be an expansion valve, and the same effect can still be achieved.

Referring to Figures 3 and 4, the first switching mechanism 411 can be switched between a first cooling position as shown in Figure 3 and a second cooling position as shown in Figure 4.

Referring to FIG. 3, when the first switching mechanism 411 is in the first cooling position, the second compressor 31 is closed, so that the second refrigerant 201 in the second cooling line 33 does not flow.

The first refrigerant 200 in the first cooling pipe 25 is pressurized by the first compressor 21 into a high-temperature high-pressure gaseous first refrigerant 200, and the gaseous first refrigerant 200 is cooled by the condenser 22 to become a normal-temperature high-pressure liquid. The first refrigerant 200, the normal temperature and high pressure liquid first refrigerant 200 passes through the first controller 23 to become a low temperature and low pressure liquid first refrigerant 200, and the low temperature and low pressure liquid first refrigerant 200 is first cooled by the multi-chamber evaporator 24. After the flow path 241 absorbs heat, the multi-chamber evaporator 24 can provide a cooling temperature of about -50 ° C, and becomes a low-temperature low-pressure gaseous first refrigerant 200, and then flows to the first compressor 21 to complete the cooling cycle.

Referring to FIG. 4, when the first switching mechanism 411 is in the second cooling position, the liquid is cooled by the condenser 22 to become a normal temperature and high pressure liquid first refrigerant 200, which flows to the first circulation pipeline as shown in FIG. The first circulation controller 413 of the 412, and the first refrigerant 200 located in the first cooling flow passage 241 of the multi-chamber evaporator 24 is temporarily in a stagnant state. The normal temperature and high pressure liquid first refrigerant 200 becomes a low temperature and low pressure liquid first refrigerant 200 through the first circulation controller 413, and the low temperature and low pressure liquid first refrigerant 200 absorbs heat through the first heat exchanger 32, and becomes a low temperature and low pressure. The gaseous first refrigerant 200 then flows to the first compressor 21 and continues to circulate.

When the temperature of the first refrigerant 200 in the first circulation line 412 is sufficient to liquefy the second refrigerant 201 in the second cooling line 33, the second compressor 31 is activated to pressurize the second cooling line. The second refrigerant 201 in the 33 is a high-temperature high-pressure gaseous second refrigerant 201 flowing to the first heat exchanger 32, and a low-temperature low-pressure liquid first refrigerant 200 and a high-temperature high-pressure gaseous second refrigerant 201 in the first heat exchanger. The heat exchange in 32 causes the high temperature and high pressure gaseous second refrigerant 201 to become a low temperature and high pressure liquid second refrigerant 201, and the low temperature and high pressure liquid second refrigerant 201 flows through the second cooling flow path 242 of the multi-chamber evaporator 24 to absorb heat. The gaseous second refrigerant 201, which becomes a low temperature and a low pressure, flows to the second compressor 31, so that the multi-chamber evaporator 24 can provide a low temperature of less than -50 ° C, or even an ultra-low temperature of -70 ° C or less.

The first switching mechanism 411 capable of switching between the first cooling position and the second cooling position is engaged by the multi-cavity evaporator 24 having the first cooling flow path 241 and the second cooling flow path 242 that are independent of each other and not in communication with each other. The multi-refrigeration system can simultaneously reduce the cooling capacity of the unary and binary refrigeration systems, thereby reducing costs and reducing space waste.

Referring to FIG. 5, the second embodiment of the novel multi-refrigeration system using the multi-chamber evaporator is substantially similar to the first embodiment, except that the multi-refrigeration system further includes a third cooling device 5, and The cyclic switching device 4 further includes a second switching unit 42 and the multi-cavity evaporator 24 further has a third independent of the first cooling flow passage 241 and the second cooling flow passage 242 and not in communication with each other. Cooling runner 243, the second cooling device 3 further includes a second controller 35 mounted to the second cooling conduit 33 and interposed between the first heat exchanger 32 and the multi-chamber evaporator 24. In this embodiment, the second controller 35 is a capillary.

The third cooling device 5 includes a third compressor 51, a second heat exchanger 52, a third cooling connected to the third compressor 51, the second heat exchanger 52, and the multi-chamber evaporator 24. The third cooling line 53 of the flow path 243 and a third auxiliary unit 54. A third refrigerant 202 flows through the third cooling line 53. In the embodiment, the third refrigerant 202 is a refrigerant that is self-mixed and adjusted by the manufacturer.

The third auxiliary unit 54 includes a third oil separator 541 installed in the third cooling line 53 and communicating with the third compressor 51, and is mounted on the third cooling line 53 and connected to the third oil and gas separation. And a third high pressure gauge 542 of the second heat exchanger 52, a third accumulator 543 attached to the third cooling duct 53 and connected to the second heat exchanger 52, and a The third cooling line 53 is connected to the third reservoir 543 and the third drying filter 544 of the third cooling passage 243 of the multi-chamber evaporator 24. The functions of the third oil separator 541, the third reservoir 543 and the third drying filter 544 are similar to the first oil separator 261, the first reservoir 263 and the first drying filter 264, respectively. I will not repeat them here.

The second switching unit 42 has a second switching mechanism 421 installed between the second drying filter 344 and the second controller 35, and a second switching mechanism 421 connected to the second switching mechanism 421. The second heat exchanger 52 and the second circulation line 422 of the second compressor 31, and one of the second circulation line 422 and the second switching mechanism 421 and the second heat exchanger 52 second cycle controllers 423. In this embodiment, the second switching mechanism 421 is a three-hole two-position three-way solenoid valve, and the The second circulation controller 423 is a capillary.

Referring to Figures 5 and 6, the second switching mechanism 421 can be switched between a third cooling position as shown in Figure 5 and a fourth cooling position as shown in Figure 6.

Referring to FIG. 5, when the first switching mechanism 411 is in the second cooling position, and the second switching mechanism 421 is in the third cooling position, the third compressor 51 is turned off to make the third cooling line 53 The third refrigerant 202 does not flow. The liquid second refrigerant 201 which is cooled by the first heat exchanger 32 and becomes a normal temperature and high pressure is a liquid second refrigerant 201 which flows through the second controller 35 to become a low temperature and a low pressure, and the low temperature and low pressure liquid second refrigerant 201 passes through the liquid refrigerant. After the second cooling runner 242 of the multi-chamber evaporator 24 absorbs heat, the multi-chamber evaporator 24 can provide a low temperature cooling temperature of less than -50 ° C, even an ultra-low temperature cooling temperature of -70 ° C or less, and The gaseous second refrigerant 201 which becomes a low temperature and a low pressure flows to the second compressor 31.

Referring to FIG. 6, when the first switching mechanism 411 is in the second cooling position, and the second switching mechanism 421 is in the fourth cooling position, the first heat exchanger 32 dissipates heat and becomes a liquid at room temperature and high pressure. The second refrigerant 201 flows to the second circulation line 422, and the first refrigerant 200 located in the first cooling flow passage 241 of the multi-chamber evaporator 24 and the second refrigerant 201 in the second cooling flow passage 242 Temporarily stagnant. The liquid-phase second refrigerant 201 at normal temperature and high pressure passes through the second circulation controller 423 to become a low-temperature low-pressure liquid second refrigerant 201, and the low-temperature low-pressure liquid second refrigerant 201 absorbs heat through the second heat exchanger 52, and becomes a low-temperature low-pressure. The gaseous second refrigerant 201 then flows to the second compressor 31 and continues to circulate.

When the temperature of the second refrigerant 201 in the second circulation line 422 is sufficient to liquefy the third refrigerant 202 in the third cooling line 53, the third compressor 51 is activated to pressurize the third cooling line 53. The third refrigerant 202 in the interior is a high-temperature high-pressure gaseous third refrigerant 202 flowing to the second heat exchanger 52, and a low-temperature low-pressure liquid second refrigerant 201 and a high-temperature high-pressure gaseous third refrigerant 202 in the second heat exchanger 52. The medium heat exchange causes the high temperature and high pressure gaseous third refrigerant 202 to become a low temperature and high pressure liquid third refrigerant 202, and the low temperature and high pressure liquid third refrigerant 202 flows through the third cooling flow passage 243 of the multi-chamber evaporator 24 to absorb heat. The gaseous third refrigerant 202, which becomes a low temperature and a low pressure, flows to the third compressor 51, so that the multi-chamber evaporator 24 can provide a lower cooling temperature (about -100 ° C) than the second refrigerant 201.

When the first switching mechanism 411 is in the first cooling position as shown in FIG. 3, and the second compressor 31 and the third compressor 51 are not activated, the first cooling device 2 can perform the operation as shown in FIG. The illustrated cooling cycle will not be described here.

In summary, the novel multi-vessel refrigeration system using a multi-cavity evaporator utilizes a multi-cavity evaporator 24 having first cooling channels 241 and second cooling channels 242 that are independent of each other and not in communication with each other. The first switching mechanism 411 that switches between the first cooling position and the second cooling position enables the multi-refrigeration system to simultaneously have the cooling capacity of the unary and binary refrigeration systems, thereby reducing costs and reducing space waste, so that the present invention can be achieved. The purpose of the new type.

However, the above is only the preferred embodiment of the present invention, and when it is not possible to limit the scope of the implementation of the present invention, The simple equivalent changes and modifications made by the scope of patents and the contents of the patent specifications are still within the scope of this new patent.

2‧‧‧First cooling device

21‧‧‧First compressor

22‧‧‧Condenser

23‧‧‧First controller

24‧‧‧Multi-cavity evaporator

241‧‧‧First cooling runner

242‧‧‧Second cooling runner

25‧‧‧First cooling line

26‧‧‧First Auxiliary Unit

261‧‧‧First oil separator

262‧‧‧First high voltage meter

263‧‧‧First reservoir

264‧‧‧First Dry Filter

3‧‧‧Second cooling device

31‧‧‧Second compressor

32‧‧‧First heat exchanger

33‧‧‧Second cooling line

34‧‧‧Second auxiliary unit

341‧‧‧Second oil and gas separator

342‧‧‧Second high pressure gauge

343‧‧‧Second reservoir

344‧‧‧Second drying filter

4‧‧‧Cycle switching device

41‧‧‧First switching unit

411‧‧‧First switching mechanism

412‧‧‧First circulation line

200‧‧‧First refrigerant

201‧‧‧Second refrigerant

Claims (8)

A multi-refrigeration system using a multi-chamber evaporator includes: a first cooling device including a first compressor, a condenser, a first controller, a multi-chamber evaporator, and a first connection a first cooling circuit of the compressor, the condenser, the first controller and the multi-chamber evaporator and having a first refrigerant, the multi-cavity evaporator having a first connection for connecting the first cooling line a cooling flow passage, and a second cooling flow passage independent of the first cooling flow passage and not communicating with each other; a second cooling device including a second compressor, a first heat exchanger, and a connection a second cooling unit of the second compressor, the first heat exchanger and the second cooling flow passage of the multi-chamber evaporator; and a cycle switching device including a first switching unit, the first switching unit Having a first switching mechanism installed between the condenser and the first controller, and a first switching mechanism, the first heat exchanger and the first compressor a first circulation line, and a first cycle installed in the first cycle a first circulation controller between the first switching mechanism and the first heat exchanger, the first switching mechanism being switchable between a first cooling position and a second cooling position, when the first switching When the mechanism is in the first cooling position, the first refrigerant flows through the first cooling pipe and the first controller to the first cooling flow passage of the multi-cavity evaporator, when the first switching mechanism is in the first In the second cooling position, the first refrigerant flows from the first circulation line and the first circulation controller to the first compressor. The multi-refrigeration system using the multi-cavity evaporator according to claim 1, wherein a second refrigerant is circulated in the second cooling pipe, and only the first refrigerant or the second refrigerant is at the same time. One flows in the multi-chamber evaporator. The multi-refrigeration system using the multi-chamber evaporator according to claim 2, wherein the first cooling device further comprises a first auxiliary unit, the first auxiliary unit has a first cooling line installed and connected a first oil separator of the first compressor, a first high pressure meter connected to the first cooling pipe and connecting the first oil separator and the condenser, and a first cooling pipe connected to the first cooling pipe a first accumulator of the condenser, a first desiccant filter mounted to the first cooling line and connecting the first accumulator and the first switching mechanism of the first switching unit. The multi-refrigeration system using the multi-cavity evaporator according to claim 3, wherein the second cooling device further comprises a second auxiliary unit, the second auxiliary unit comprising a second cooling unit connected to the second cooling line a second oil separator of the second compressor, a second high pressure meter mounted on the second cooling pipe and connecting the second oil separator and the first heat exchanger, and a second cooling pipe And a second reservoir connected to the first heat exchanger, and a second second cooling passage connected to the second cooling conduit and connecting the second reservoir and the multi-chamber evaporator Dry the filter. The multi-refrigeration system using the multi-chamber evaporator according to any one of claims 2 to 3, further comprising a third cooling device, the multi-cavity The body evaporator further has a third cooling flow path independent of the first cooling flow path and the second cooling flow path and not communicating with each other, the third cooling device including a third compressor and a second heat An exchanger, and a third cooling line connecting the third compressor, the second heat exchanger, and a third cooling passage of the multi-chamber evaporator. The multi-refrigeration system using the multi-cavity evaporator according to claim 5, wherein a third refrigerant is circulated in the third cooling pipe, and only the first refrigerant, the second refrigerant or the first time is at the same time. One of the three refrigerants flows in the multi-chamber evaporator. The multiple refrigeration system of the multi-cavity evaporator of claim 6, wherein the cyclic switching device further comprises a second switching unit, and the second cooling device further comprises a second cooling circuit installed a second controller between the first heat exchanger and the multi-chamber evaporator, the second switching unit having a second cooling pipe installed between the first heat exchanger and the first a second switching mechanism between the two controllers, a second switching line connecting the second switching mechanism, the second heat exchanger and the second compressor, and a second circulation line installed between the two a second circulation controller between the second switching mechanism and the second heat exchanger, the second switching mechanism being switchable between a third cooling position and a fourth cooling position, wherein the second switching mechanism is in the In the three cooling position, the second refrigerant is a second cooling flow path flowing to the multi-cavity evaporator via the second cooling pipe and the second controller, when the switch is in the fourth cooling position, The second refrigerant is controlled by the second circulation line and the second circulation The device flows to the second compressor. The multi-refrigeration system using the multi-cavity evaporator according to claim 7, wherein the third cooling device further comprises a third auxiliary unit, wherein the third auxiliary unit comprises a third cooling unit and is connected to the third cooling unit. a third oil separator of the third compressor, a third high pressure meter mounted on the third cooling line and connecting the third oil separator and the second heat exchanger, and a third cooling pipe And a third accumulator connected to the second heat exchanger, and a third third cooling passage connected to the third cooling duct and connecting the third accumulator and the multi-cavity evaporator Dry the filter.