CN204963279U - Multi-element refrigeration system using multi-cavity evaporator - Google Patents

Abstract

A multi-component refrigeration system using a multi-chamber evaporator includes a first cooling device, a second cooling device and a circulation switching device. The first cooling device includes a first compressor, a condenser, a first controller, an evaporator, and a first cooling pipeline. The evaporator has a first cooling channel and a second cooling channel that are independent of each other and not interconnected. The second cooling device includes a second compressor, a first heat exchanger, and a second cooling pipeline. The circulation switching device includes a first switching mechanism that can switch between a first cooling position and a second cooling position. By using the evaporator and cooperating with the first switching mechanism, the multi-component refrigeration system has the cooling capacity of both a single-component and a binary refrigeration system, thereby reducing costs and reducing space waste.

Description

Multi-element refrigeration system using multi-cavity evaporator

technical field

The utility model relates to a refrigeration system, in particular to a multi-element refrigeration system using a multi-cavity evaporator.

Background technique

Referring to Fig. 1, the existing unitary refrigeration system comprises a compressor 11, a condenser 12 connected to the compressor 11, an expansion valve 13 connected to the condenser 12, and an expansion valve 13 connected to the compressor 11 Evaporator 14.

The compressor 11 is pressurized into a high-temperature and high-pressure gaseous refrigerant 101, which becomes a normal-temperature and high-pressure liquid refrigerant 102 after being radiated by the condenser 12, and the normal-temperature and high-pressure liquid refrigerant 102 becomes a low-temperature and low-pressure liquid refrigerant 103 through the expansion valve 13. The liquid refrigerant 103 absorbs heat through the evaporator 14 to become a low-temperature and low-pressure gas refrigerant 104 and then flows to the compressor 11 . The existing unitary refrigeration system is generally used in air conditioning systems and refrigeration systems. Although it can achieve cooling effects, the application surface is indirect cooling, and its cooling temperature is between -10°C and -30°C. When a lower temperature refrigeration system is required, then A binary refrigeration system needs to be used instead.

Referring to FIG. 2 , an existing 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, a liquefaction expansion valve 153 connected to the liquefaction condenser 152, and a liquefaction expansion valve 153 connected to the liquefaction compressor. 151 of the heat exchanger 154 . 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 uses a refrigerant 105 such as R404A or R507 which can be liquefied under high pressure and normal temperature, while the cooling unit 16 uses a refrigerant 106 such as R23 which cannot be liquefied under high pressure and normal temperature. Using the refrigerant 105 of the liquefaction unit 15 to cooperate with the heat exchanger 154, the refrigerant 106 of the cooling unit 16 can be liquefied, and the cooling temperature can reach about -85°C.

The existing unitary refrigeration system and binary refrigeration system are independent systems. Therefore, if there is a cooling demand in a wide temperature range, the existing method must have a unitary refrigeration system and a binary refrigeration system at the same time. Not only the production cost and Subsequent maintenance costs are relatively high, and it takes up space. How to meet the cooling requirements of a wide temperature range in one system, while reducing costs and reducing space waste, has become the goal that relevant industry players want to overcome.

Contents of the invention

The purpose of the utility model is to provide a multi-element refrigeration system using a multi-cavity evaporator which has a wide temperature range application environment and can reduce cost and space waste.

The utility model applies a multi-element refrigeration system of a multi-cavity evaporator, comprising: 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-chamber evaporator, and a first cooling pipe connecting the first compressor, the condenser, the first controller and the multi-chamber evaporator and passing a first refrigerant The multi-cavity evaporator has a first cooling flow channel for connecting the first cooling pipeline, and a second cooling flow channel which is independent from the first cooling flow channel and not communicated with each other.

The second cooling device includes a second compressor, a first heat exchanger, and a second cooling channel connecting the second compressor, the first heat exchanger and the multi-cavity evaporator. Cooling lines.

The cycle switching device includes a first switching unit, the first switching unit has a first switching mechanism installed on the first cooling pipeline and between the condenser and the first controller, and a first switching mechanism connected to the first A switching mechanism, the first heat exchanger and the first circulation pipeline of the first compressor, and a first circulation pipeline installed on the first circulation pipeline and interposed between the first switching mechanism and the first heat exchanger A cycle controller, the first switching mechanism can switch between a first cooling position and a second cooling position, when the first switching mechanism is at the first cooling position, the first refrigerant is cooled by the first cooling The pipeline and the first controller flow to the first cooling channel of the multi-cavity evaporator. When the first switching mechanism is at the second cooling position, the first refrigerant is composed of the first circulation pipeline and the A first cycle controller flows to the first compressor.

In the multi-component refrigeration system using a multi-cavity evaporator described in the utility model, a second refrigerant circulates in the second cooling pipeline, and at the same time only one of the first refrigerant or the second refrigerant is used in the multiple flow in the chamber evaporator.

In the multi-component refrigeration system using multi-cavity evaporators described in the utility model, the first cooling device also includes a first auxiliary unit, and the first auxiliary unit has a The first oil-air separator of the engine, a first high-pressure gauge installed on the first cooling pipeline and connected to the first oil-gas separator and the condenser, a first high-pressure gauge installed on the first cooling pipeline and connected to the condenser A first liquid reservoir, a first dry filter installed on the first cooling pipeline and connected to the first liquid reservoir and the first switching mechanism of the first switching unit.

In the multi-component refrigeration system using multi-cavity evaporators described in the present invention, the second cooling device also includes a second auxiliary unit, and the second auxiliary unit includes a The second oil-air separator of the machine, a second high pressure gauge installed on the second cooling pipeline and connected to the second oil-gas separator and the first heat exchanger, a second high pressure gauge installed on the second cooling pipeline and connected to the The second liquid reservoir of the first heat exchanger, and a second dry filter installed on the second cooling pipeline and connecting the second liquid reservoir and the second cooling channel of the multi-cavity evaporator.

The multi-component refrigeration system using a multi-cavity evaporator described in the utility model also includes a third cooling device, and the multi-cavity evaporator also has a The third cooling channel and the second cooling channel are independent of each other and do not communicate with each other. The third cooling device includes a third compressor, a second heat exchanger, and a connection between the third compressor, The second heat exchanger and the third cooling pipeline of the third cooling channel of the multi-cavity evaporator.

In the multi-component refrigeration system using a multi-cavity evaporator described in the present invention, a third refrigerant circulates in the third cooling pipeline, and only one of the first refrigerant, the second refrigerant, or the third refrigerant flows at the same time One of them flows in the multi-chamber evaporator.

In the multi-element refrigeration system using a multi-cavity evaporator described in the present invention, the cycle switching device also includes a second switching unit, and the second cooling device also includes a A second controller between a heat exchanger and the multi-cavity evaporator, the second switching unit has a second cooling pipeline installed between the first heat exchanger and the second controller A second switching mechanism, a second circulation pipeline connecting the second switching mechanism, the second heat exchanger and the second compressor, and a second circulation pipeline installed on the second circulation pipeline and interposed between the second switching mechanism and the second circulation controller between the second heat exchanger, the second switching mechanism can switch between a third cooling position and a fourth cooling position, when the second switching mechanism is at the third cooling position, The second refrigerant flows to the second cooling channel of the multi-cavity evaporator through the second cooling pipeline and the second controller. When the second switching mechanism is at the fourth cooling position, the second refrigerant It flows to the second compressor through the second circulation pipeline and the second circulation controller.

In the multi-component refrigeration system using multi-cavity evaporators described in the present invention, the third cooling device also includes a third auxiliary unit, and the third auxiliary unit includes a The third oil-air separator of the engine, a third high-pressure gauge installed on the third cooling pipeline and connected to the third oil-gas separator and the second heat exchanger, and a third high-pressure gauge installed on the third cooling pipeline and connected to the The third liquid reservoir of the second heat exchanger, and a third dry filter installed on the third cooling pipeline and connecting the third liquid reservoir and the third cooling channel of the multi-cavity evaporator.

The beneficial effect of the utility model is that: using a multi-cavity evaporator with a first cooling channel and a second cooling channel that are independent and not connected to each other, the coordination can switch between the first cooling position and the second cooling position The first switching mechanism makes the multi-element refrigeration system have the cooling capacity of the one-element and two-element refrigeration systems at the same time, thereby reducing costs and reducing space waste.

Description of drawings

Fig. 1 is a schematic diagram illustrating the state of a conventional unitary refrigeration system.

Fig. 2 is a schematic diagram illustrating the state of a conventional binary refrigeration system.

Fig. 3 is a system diagram illustrating the first embodiment of the multi-cavity evaporator multi-component refrigeration system of the present invention, the first switching mechanism is in a first cooling position.

FIG. 4 is a system diagram illustrating the first switching mechanism of the first embodiment in a second cooling position.

Fig. 5 is a system diagram illustrating the second embodiment of the multi-cavity evaporator multi-component refrigeration system of the present invention, the second switching mechanism is in a third cooling position.

FIG. 6 is a system diagram illustrating the second embodiment of the present invention, the second switching mechanism is in a fourth cooling position.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail. It should be noted that in the following description, similar components are denoted by the same reference numerals.

Referring to Fig. 3, the first embodiment of the multi-element refrigeration system of the utility model application multi-cavity evaporator comprises a first cooling device 2, a second cooling device 3, and a connection between the first cooling device 2 and the second cooling device. The cycle switching device 4 of the cooling device 3 .

The first cooling device 2 includes a first compressor 21, a condenser 22, a first controller 23, a multi-cavity evaporator 24, a connection to the first compressor 21, the condenser 22, the first A controller 23 and the multi-chamber evaporator 24 communicate with a first cooling pipeline 25 of a first refrigerant 200 that can be liquefied at high pressure and normal temperature, and a first auxiliary unit installed on the first cooling pipeline 25 26.

In this embodiment, the first refrigerant 200 is R507 refrigerant, and the first controller 23 is a capillary tube used to reduce the pressure and temperature of the first refrigerant 200. In practical applications, the first controller 23 can also It is an expansion valve, which can still achieve the same effect.

The multi-chamber evaporator 24 has a first cooling channel 241 for connecting the first cooling pipeline 25, and a second cooling channel 242 independent from the first cooling channel 241 and not communicating with each other. .

The first auxiliary unit 26 has a first oil-gas separator 261 installed on the first cooling pipeline 25 and connected to the first compressor 21, a first oil-gas separator 261 installed on the first cooling pipeline 25 and connected to the first oil-gas separator A first high pressure gauge 262 of the device 261 and the condenser 22, a first liquid receiver 263 installed on the first cooling pipeline 25 and connected to the condenser 22, and a first liquid receiver 263 installed on the first cooling pipeline 25 and The first dry filter 264 of the first liquid reservoir 263 is connected. The first oil-gas 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 gaseous first refrigerant 200 from the liquid first refrigerant 200 and store the liquid first refrigerant. A refrigerant 200, and the first dry 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 unit connecting the second compressor 31, the first heat exchanger 32 and the multi-chamber evaporator 24. The second cooling pipeline 33 of the flow channel 242 , and a second auxiliary unit 34 installed on the second cooling pipeline 33 . A second refrigerant 201 that cannot be liquefied under high pressure and normal temperature flows through the second cooling pipeline 33 . In this embodiment, the second refrigerant 201 is R23 refrigerant.

The second auxiliary unit 34 includes a second oil-gas separator 341 installed on the second cooling pipeline 33 and connected to the second compressor 31 , a second oil-gas separator 341 installed on the second cooling pipeline 33 and connected to the second oil-gas separator 341 and the second high pressure gauge 342 of the first heat exchanger 32, a second liquid reservoir 343 installed on the second cooling pipeline 33 and connected to the first heat exchanger 32, and a second liquid reservoir 343 installed on the first heat exchanger 32 The second cooling pipeline 33 is connected to the second liquid reservoir 343 and the second drying filter 344 of the second cooling channel 242 of the multi-cavity evaporator 24 . The functions of the second oil-gas separator 341 , the second liquid reservoir 343 and the second dry filter 344 are similar to those of the first oil-gas separator 261 , the first liquid reservoir 263 and the first dry filter 264 respectively, I won't go into details here.

The cycle switching device 4 includes a first switching unit 41 connected to the condenser 22, and the first switching unit 41 has a device installed on the first cooling pipeline 25 between the first dry filter 264 and the first A first switching mechanism 411 between the controllers 23, a first circulation pipeline 412 connecting the first switching mechanism 411, the first heat exchanger 32 and the first compressor 21, and a first circulation pipeline 412 installed in the first circulation A pipeline 412 and a first circulation controller 413 between the first switching mechanism 411 and the first heat exchanger 32 .

In this embodiment, the first switching mechanism 411 is a three-way solenoid valve with three holes and two positions, and the first circulation controller 413 is a capillary tube used to reduce the pressure and temperature of the first refrigerant 200. In practical applications, , the first cycle controller 413 can also be an expansion valve, and the same effect can still be achieved.

Referring to FIGS. 3 and 4 , the first switching mechanism 411 can switch between a first cooling position as shown in FIG. 3 and a second cooling position as shown in FIG. 4 .

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

The first refrigerant 200 in the first cooling pipeline 25 is pressurized by the first compressor 21 to become a high-temperature and high-pressure gaseous first refrigerant 200, and the gaseous first refrigerant 200 becomes a liquid state at room temperature and high pressure after being dissipated by the condenser 22. The first refrigerant 200, the normal temperature and high pressure liquid first refrigerant 200 becomes the low temperature and low pressure liquid first refrigerant 200 through the first controller 23, the low temperature and low pressure liquid first refrigerant 200 passes through the first cooling of the multi-cavity evaporator 24 After the flow channel 241 absorbs heat, the multi-cavity evaporator 24 can provide a cooling temperature of about -50° C., and become a low-temperature and low-pressure gaseous first refrigerant 200 , and then flow 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 condenser 22 dissipates heat and becomes a liquid first refrigerant 200 at room temperature and high pressure, as shown in FIG. 4 , and flows to the first circulation pipeline 412 of the first circulation controller 413, and the first refrigerant 200 in the first cooling channel 241 of the multi-cavity evaporator 24 is temporarily stagnant. The normal temperature and high pressure liquid first refrigerant 200 passes through the first cycle controller 413 to become a low temperature and low pressure liquid first refrigerant 200, and the low temperature and low pressure liquid first refrigerant 200 absorbs heat through the first heat exchanger 32 to become a low temperature and low pressure liquid refrigerant. 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, start the second compressor 31 to pressurize the second cooling line The second refrigerant 201 in 33 becomes the high-temperature and high-pressure gaseous second refrigerant 201 flowing to the first heat exchanger 32, and the low-temperature and low-pressure liquid first refrigerant 200 and the high-temperature and high-pressure gaseous second refrigerant 201 are in the first heat exchanger 32. 32 heat exchange, so that the high temperature and high pressure gaseous second refrigerant 201 becomes the 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 channel 242 of the multi-cavity evaporator 24 to absorb heat Afterwards, the low-temperature and low-pressure gaseous second refrigerant 201 flows to the second compressor 31, so that the multi-chamber evaporator 24 can provide a low temperature lower than -50°C, even an ultra-low temperature below -70°C. .

Utilize the multi-cavity evaporator 24 with the first cooling channel 241 and the second cooling channel 242 that are independent and not communicated with each other, cooperate with the first switching mechanism 411 that can switch between the first cooling position and the second cooling position , so that the multi-element refrigeration system has the cooling capacity of the one-element and two-element refrigeration systems at the same time, thereby reducing cost and reducing space waste.

Referring to Fig. 5, the second embodiment of the multi-component refrigeration system using a multi-cavity evaporator of the present invention is roughly similar to the first embodiment, except that the multi-component refrigeration system also includes a third cooling device 5, The cycle switching device 4 also includes a second switching unit 42, and the multi-cavity evaporator 24 also has a first cooling channel 241 and the second cooling channel 242 that are independent and not communicated with each other. Three cooling passages 243 , the second cooling device 3 further includes a second controller 35 installed on the second cooling pipeline 33 and between the first heat exchanger 32 and the multi-cavity 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 unit connecting the third compressor 51, the second heat exchanger 52 and the multi-chamber evaporator 24. The third cooling pipeline 53 of the flow channel 243 , and a third auxiliary unit 54 . A third refrigerant 202 circulates in the third cooling pipeline 53 . In this embodiment, the third refrigerant 202 is a refrigerant mixed and adjusted by the industry according to the demand.

The third auxiliary unit 54 includes a third oil-gas separator 541 installed on the third cooling pipeline 53 and connected to the third compressor 51 , a third oil-gas separator 541 installed on the third cooling pipeline 53 and connected to the third oil-gas separator 541 and the third high pressure gauge 542 of the second heat exchanger 52, a third liquid reservoir 543 installed on the third cooling pipeline 53 and connected to the second heat exchanger 52, and a third liquid receiver 543 installed on the second heat exchanger 52. The third cooling pipeline 53 is connected to the third liquid storage 543 and the third drying filter 544 of the third cooling channel 243 of the multi-cavity evaporator 24 . The effects of the third oil-gas separator 541 , the third liquid reservoir 543 and the third dry filter 544 are similar to those of the first oil-gas separator 261 , the first liquid reservoir 263 and the first dry filter 264 respectively, I won't go into details here.

The second switching unit 42 has a second switching mechanism 421 installed on the second cooling pipeline 33 and between the second dry filter 344 and the second controller 35, and a second switching mechanism 421 connected to the second switching mechanism 421. , the second circulation pipeline 422 of the second heat exchanger 52 and the second compressor 31, and a 52 between the second cycle controller 423 . In this embodiment, the second switching mechanism 421 is a three-hole two-position three-way solenoid valve, and the second circulation controller 423 is a capillary tube.

Referring to FIGS. 5 and 6 , the second switching mechanism 421 can switch between a third cooling position as shown in FIG. 5 and a fourth cooling position as shown in FIG. 6 .

Referring to FIG. 5 , when the first switching mechanism 411 is at the second cooling position and the second switching mechanism 421 is at the third cooling position, the third compressor 51 is turned off so that the third cooling pipeline 53 The third refrigerant 202 does not flow. And after the first heat exchanger 32 dissipates heat, it becomes the liquid second refrigerant 201 at room temperature and high pressure, and flows through the second controller 35 to become the low temperature and low pressure liquid second refrigerant 201, and the low temperature and low pressure liquid second refrigerant 201 passes through the After the second cooling channel 242 of the multi-chamber evaporator 24 absorbs heat, the multi-chamber evaporator 24 can provide a low-temperature cooling temperature lower than -50°C, or even an ultra-low temperature cooling temperature below -70°C. And become the low-temperature and low-pressure gaseous second refrigerant 201 , and then flow 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, it will be in a liquid state at room temperature and high pressure after being dissipated by the first heat exchanger 32. The second refrigerant 201 flows to the second circulation pipeline 422 , and the first refrigerant 200 in the first cooling channel 241 of the multi-cavity evaporator 24 and the second refrigerant 201 in the second cooling channel 242 Temporarily stagnated. The normal temperature and high pressure liquid second refrigerant 201 passes through the second circulation controller 423 to become a low temperature and low pressure liquid second refrigerant 201, and the low temperature and low pressure liquid second refrigerant 201 absorbs heat through the second heat exchanger 52 to become a low temperature and low pressure liquid refrigerant. 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, start the third compressor 51 to pressurize the third cooling line 53 The third refrigerant 202 inside becomes the high-temperature and high-pressure gaseous third refrigerant 202 flowing to the second heat exchanger 52, and the low-temperature and low-pressure liquid second refrigerant 201 and the high-temperature and high-pressure gaseous third refrigerant 202 are in the second heat exchanger 52 Medium heat exchange, so that the high-temperature and high-pressure gaseous third refrigerant 202 becomes the 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 channel 243 of the multi-cavity evaporator 24 to absorb heat , the low-temperature and low-pressure gaseous third refrigerant 202 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 cooling operation as shown in FIG. 3 The cooling cycle shown is not repeated here.

In summary, the multi-cavity refrigeration system using multi-cavity evaporators in the present invention utilizes the multi-cavity evaporator 24 with the first cooling channel 241 and the second cooling channel 242 that are independent and not connected to each other. The first switching mechanism 411 that switches between the first cooling position and the second cooling position enables the multi-element refrigeration system to have the cooling capacity of the one-element and two-element refrigeration systems at the same time, and can reduce costs and reduce space waste, so it can indeed achieve The purpose of this utility model.

Claims (8)

1. apply the polynary refrigeration system of Multicarity evaporimeter for one kind, comprise: first cooling device, second cooling device, and a cyclic switching device, this first cooling device comprises first compressor, a condenser, first controller, a Multicarity evaporimeter, and one connects this first compressor, this condenser, this first controller and this Multicarity evaporimeter and the first cooling line of first refrigerant that circulates, this second cooling device comprises second compressor, first heat exchanger, and one connects this second compressor, second cooling line of this first heat exchanger and this Multicarity evaporimeter, it is characterized in that: this Multicarity evaporimeter has one for connecting the first coolant flow channel of this first cooling line, and one with this first coolant flow channel separate and the second coolant flow channel be not interconnected, this second cooling line connects this second coolant flow channel, this cyclic switching device comprises first switch unit, this first switch unit has one and is installed on this first cooling line and the first switching mechanism between this condenser and this first controller, one connects this first switching mechanism, first circulation line of this first heat exchanger and this first compressor, and one is installed on this first circulation line and the first cycle controller between this first switching mechanism and this first heat exchanger, this first switching mechanism can switch between first cool position and second cool position, when this first switching mechanism is in this first cool position, this first refrigerant is the first coolant flow channel flowing to this Multicarity evaporimeter through this first cooling line and this first controller, when this first switching mechanism is in this second cool position, this first refrigerant flows to this first compressor by this first circulation line and this first cycle controller.

2. apply the polynary refrigeration system of Multicarity evaporimeter according to claim 1, it is characterized in that: circulation has second refrigerant in this second cooling line, one of them only having this first refrigerant or this second refrigerant at one time flows in this Multicarity evaporimeter.

3. apply the polynary refrigeration system of Multicarity evaporimeter according to claim 2, it is characterized in that: this first cooling device also comprises first auxiliary unit, this first auxiliary unit has one and is installed on this first cooling line and the first gs-oil separator connecting this first compressor, one is installed on this first cooling line and connects the first high pressure gauge of this first gs-oil separator and this condenser, one is installed on this first cooling line and connects the first reservoir of this condenser, one is installed on this first cooling line and connects the first device for drying and filtering of the first switching mechanism of this first reservoir and this first switch unit.

4. apply the polynary refrigeration system of Multicarity evaporimeter according to claim 3, it is characterized in that: this second cooling device also comprises second auxiliary unit, this second auxiliary unit comprises one and is installed on this second cooling line and the second gs-oil separator being communicated with this second compressor, one is installed on this second cooling line and connects the second high pressure gauge of this second gs-oil separator and this first heat exchanger, one is installed on this second cooling line and connects the second reservoir of this first heat exchanger, and one is installed on this second cooling line and connects the second device for drying and filtering of the second coolant flow channel of this second reservoir and this Multicarity evaporimeter.

5. according to Claims 2 or 3, apply the polynary refrigeration system of Multicarity evaporimeter, it is characterized in that: the polynary refrigeration system of this application Multicarity evaporimeter also comprises the 3rd cooling device, this Multicarity evaporimeter also have one with this first coolant flow channel and separate and the 3rd coolant flow channel be not interconnected of this second coolant flow channel, 3rd cooling device, comprise the 3rd compressor, second heat exchanger, and one connects the 3rd compressor, 3rd cooling line of the 3rd coolant flow channel of this second heat exchanger and this Multicarity evaporimeter.

6. apply the polynary refrigeration system of Multicarity evaporimeter according to claim 5, it is characterized in that: circulation has the 3rd refrigerant in the 3rd cooling line, one of them only having this first refrigerant, this second refrigerant or the 3rd refrigerant at one time flows in this Multicarity evaporimeter.

7. apply the polynary refrigeration system of Multicarity evaporimeter according to claim 6, it is characterized in that: this cyclic switching device also comprises second switch unit, and this second cooling device also comprises one is installed on this second cooling line and second controller between this first heat exchanger and this Multicarity evaporimeter, this second switch unit has one and is installed on this second cooling line and the second switching mechanism between this first heat exchanger and this second controller, one connects this second switching mechanism, second circulation line of this second heat exchanger and this second compressor, and one is installed on this second circulation line and the second cycle controller between this second switching mechanism and this second heat exchanger, this second switching mechanism can switch between the 3rd cool position and the 4th cool position, when this second switching mechanism is in the 3rd cool position, this second refrigerant is the second coolant flow channel flowing to this Multicarity evaporimeter through this second cooling line and this second controller, when this second switching mechanism is in the 4th cool position, this second refrigerant flows to this second compressor through this second circulation line and this second cycle controller.

8. apply the polynary refrigeration system of Multicarity evaporimeter according to claim 7, it is characterized in that: the 3rd cooling device also comprises the 3rd auxiliary unit, 3rd auxiliary unit comprises one and is installed on the 3rd cooling line and the 3rd gs-oil separator being communicated with the 3rd compressor, one is installed on the 3rd cooling line and connects the third high pressure table of the 3rd gs-oil separator and this second heat exchanger, one is installed on the 3rd cooling line and connects the 3rd reservoir of this second heat exchanger, and one is installed on the 3rd cooling line and connects the 3rd device for drying and filtering of the 3rd coolant flow channel of the 3rd reservoir and this Multicarity evaporimeter.