CN218210160U - Cascade refrigerating device - Google Patents
Cascade refrigerating device Download PDFInfo
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- CN218210160U CN218210160U CN202222613825.3U CN202222613825U CN218210160U CN 218210160 U CN218210160 U CN 218210160U CN 202222613825 U CN202222613825 U CN 202222613825U CN 218210160 U CN218210160 U CN 218210160U
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Abstract
The utility model relates to the technical field of refrigeration devices, and discloses a cascade refrigeration device, which comprises a case, wherein a primary refrigeration system and a secondary refrigeration system are arranged inside the case, the primary refrigeration system and the secondary refrigeration system are connected through a plate heat exchanger, the primary refrigeration system comprises a first compressor, a first oil-liquid separator and a first condenser which are connected in sequence, the first compressor is also connected with a liquid storage tank, and the other end of the liquid storage tank is connected with an external evaporator; the utility model has the advantages of as follows: 1. the refrigeration temperature area of the conventional system is greatly widened while the refrigeration working efficiency is ensured; 2. the multi-stage refrigeration system can effectively reduce the production cost and the occupied area by overlapping; 3. the Y-shaped filter is arranged at the water inlet end of the condenser, so that impurities are effectively eliminated, and normal use of equipment is protected.
Description
Technical Field
The utility model relates to a refrigerating plant technical field especially relates to a cascade refrigerating plant.
Background
The high-low temperature test is a conventional technical means for detecting the stability of various electrical parts at present, and is usually used together with a high-low temperature test chamber. In order to enable the interior of the test box to reach a sufficient refrigeration temperature, the test box needs to be externally connected with a refrigeration system, the refrigeration system is connected with an evaporator inside the test box, and the control of the temperature inside the test box is realized through a control device.
In the existing refrigeration system, the limit low temperature which can be achieved under the common condition is-80 ℃, if the temperature needs to be reduced to be lower, a liquid nitrogen refrigeration mode needs to be adopted or a plurality of refrigeration devices need to be connected to the outside of a test box simultaneously for cooperative use, but the two modes have the problems of high cost, the transportation and the storage of the liquid nitrogen are difficult, and the connection of the plurality of refrigeration devices occupies too much production area.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cascade refrigeration device to prior art's not enough, it has the wide, the low-cost characteristics of refrigeration interval.
In order to achieve the purpose, the utility model relates to a cascade refrigeration device, which comprises a case, wherein a primary refrigeration system and a secondary refrigeration system are arranged inside the case, the primary refrigeration system and the secondary refrigeration system are connected through a plate heat exchanger, the primary refrigeration system comprises a first compressor, a first oil-liquid separator and a first condenser which are connected in sequence, the first compressor is also connected with a liquid storage tank, and the other end of the liquid storage tank is connected with an external evaporator; the second refrigeration system comprises a second compressor, a second oil-liquid separator and a second condenser which are connected in sequence, and the first condenser and the second condenser are both connected with the plate heat exchanger.
Preferably, a check valve is disposed between the first compressor and the first oil-liquid separator.
Preferably, the liquid storage tank is provided with a first pressure sensor.
Further, a second pressure sensor is arranged between the first condenser and the plate heat exchanger.
Preferably, the water inlet ends of the first condenser and the second condenser are both provided with filters.
Furthermore, a control cabinet is arranged at the front end of the case, and a control panel is arranged on the control cabinet.
Preferably, the case is further provided with an exhaust fan for dissipating heat of the equipment.
Preferably, the machine case is a double-layer machine case, and the first condenser, the second condenser and the plate heat exchanger are all arranged on the upper layer of the machine case.
Preferably, a drying filter is arranged between the second condenser and the plate heat exchanger.
Has the advantages that: compared with the prior art, the utility model relates to a cascade refrigeration device, which comprises a case, wherein a primary refrigeration system and a secondary refrigeration system are arranged inside the case, the primary refrigeration system and the secondary refrigeration system are connected through a plate heat exchanger, the primary refrigeration system comprises a first compressor, a first oil-liquid separator and a first condenser which are connected in sequence, the first compressor is also connected with a liquid storage tank, and the other end of the liquid storage tank is connected with an external evaporator; the utility model has the advantages of as follows: 1. the refrigeration temperature area of the conventional system is greatly widened while the refrigeration working efficiency is ensured; 2. the multi-stage refrigeration system can effectively reduce the production cost and the occupied area by overlapping; 3. the Y-shaped filter is arranged at the water inlet end of the condenser, so that impurities are effectively eliminated, and normal use of equipment is protected.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the case of the present invention.
Fig. 3 is a schematic structural diagram of the primary refrigeration system and the secondary refrigeration system of the present invention.
The reference numerals include:
the air conditioner comprises a case (1), a control cabinet (11), a control panel (12), an exhaust fan (13), a primary refrigeration system (2), a first compressor (21), a first oil-liquid separator (22), a first condenser (23), a check valve (24), a second pressure sensor (25), a secondary refrigeration system (3), a second compressor (31), a second oil-liquid separator (32), a second condenser (33), a drying filter (34), a plate heat exchanger (4), a liquid storage tank (5), a first pressure sensor (51) and a filter (6).
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 3.
The utility model relates to a cascade refrigerating plant, including quick-witted case 1, machine incasement portion is provided with one-level refrigerating system 2 and second grade refrigerating system 3, one-level refrigerating system 2 and second grade refrigerating system 3 pass through plate heat exchanger 4 and connect. The primary refrigeration system 2 comprises a first compressor 21, a first oil-liquid separator 22 and a first condenser 23 which are sequentially connected, the first compressor 21 is further connected with a liquid storage tank 5, the other end of the liquid storage tank 5 is connected with an external evaporator, the liquid storage tank 5 is mainly used for storing liquid refrigerant and has a liquid sealing effect, gas is prevented from flowing into the compressor from the external evaporator to generate liquid impact accidents, and the service life of the compressor is effectively prolonged; the two-stage refrigeration system 3 comprises a second compressor 31, a second oil-liquid separator 32 and a second condenser 33 which are sequentially connected, the first condenser 23 and the second condenser 33 are both connected with the plate heat exchanger 4, and the first oil-liquid separator 22 and the second oil-liquid separator 32 separate oil from refrigerant flowing out of the compressors and mixed with lubricant to remove oily impurities.
The utility model discloses when using, machine case 1 is inside to be formed with one-level refrigeration cycle and second grade refrigeration cycle, wherein, the inside R23 refrigerant of placing of one-level refrigeration cycle's first compressor 21, minimum refrigerating temperature is about-83 ℃, the inside R404A refrigerant of placing of second grade refrigeration cycle, minimum refrigerating temperature is about-45 ℃, when refrigerating temperature is within-83 ℃, need not to use second grade refrigerating system 3, when refrigerating temperature is below-83 ℃, second grade refrigerating system 3 just can start, compensate required refrigerating temperature.
Wherein, the connection mode of the primary refrigeration system 2 is as follows: the refrigerant discharge end of the external evaporator is connected with a liquid storage tank 5, the liquid storage tank 5 is connected with a first compressor 21, the first compressor 21 is connected with a first oil-liquid separator 22, the first oil-liquid separator 22 is connected with a first condenser 23, the first condenser 23 is connected with a plate heat exchanger 4, and the plate heat exchanger 4 is finally connected with the refrigerant inflow end of the external evaporator; the connection mode of the secondary refrigeration system 3 is as follows: the plate heat exchanger 4 is connected with the second compressor 31, the second compressor 31 is connected with the second oil-liquid separator 32, the second oil-liquid separator 32 is connected with the second condenser 33, and the second condenser 33 is connected back to the plate heat exchanger 4 to form a secondary refrigeration cycle.
The utility model discloses compare with traditional refrigerating plant, have following advantage: 1. the refrigeration temperature area of the conventional system is greatly widened while the refrigeration working efficiency is ensured; 2. the multi-stage refrigeration system can effectively reduce the production cost and the occupied area by superposition.
In one embodiment, a check valve 24 is disposed between the first compressor 21 and the first oil-liquid separator 22. The check valve 24 prevents the refrigerant from flowing back into the first compressor 21, thereby preventing the compressor from being abnormal and prolonging the service life of the equipment. Similarly, a check valve 24 is provided between the second compressor 31 and the second oil-liquid separator 32.
Preferably, the inventors provide the receiver tank 5 with a first pressure sensor 51 and a second pressure sensor 25 between the first condenser 23 and the plate heat exchanger 4. The first pressure sensor 51 detects the pressure value of the refrigerant before pressurization, the second pressure sensor 25 detects the pressure value of the refrigerant after pressurization, information is transmitted to the control center, a user can conveniently monitor the parameters inside the equipment, when the pressure value reaches a certain limit and safety problems possibly occur, the equipment gives an alarm, and the emergency stop of the equipment can be automatically or manually realized.
In order to further improve the technical scheme, the water inlet ends of the first condenser 23 and the second condenser 33 are respectively provided with a filter 6. The utility model discloses a Y type internal thread filter 6 filters aquatic impurity, and Y type internal thread filter 6 has the structure advanced, and the resistance is little, advantages such as the blowdown is convenient.
In the technical scheme, a control cabinet 11 is arranged at the front end of the case 1, and a control panel 12 is arranged on the control cabinet 11. The control cabinet 11 is a core control component of the whole device, the control panel 12 includes a display screen, and the values of the first pressure sensor 51 and the second pressure sensor 25 are displayed on the display screen so as to facilitate the operator to monitor the device.
Preferably, the top of the cabinet 1 is provided with an exhaust fan 13 for dissipating heat of the equipment.
As shown in fig. 2, in the present technical solution, the cabinet 1 is a double-layer cabinet 1, and the first condenser 23, the second condenser 33 and the plate heat exchanger 4 are all disposed on an upper layer of the cabinet 1. The double-layer case 1 divides the internal components into two layers for placing, and can effectively reduce the occupied area of the refrigerating system.
Preferably, a drying filter 634 is arranged between the second condenser 33 and the plate heat exchanger 4. The desiccant filter 634 can absorb moisture impurities in the refrigerant, thereby avoiding affecting the refrigeration effect of the refrigerant. The utility model discloses in, also be provided with drier-filter 634 between plate heat exchanger 4 and the outside evaporimeter for the cooling effect is better after the refrigerant gets into the evaporimeter.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there may be variations in the embodiments and applications according to the spirit of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (9)
1. A cascade refrigeration device comprises a machine box (1), and is characterized in that: a primary refrigeration system (2) and a secondary refrigeration system (3) are arranged in the case (1), the primary refrigeration system (2) and the secondary refrigeration system (3) are connected through a plate heat exchanger (4), the primary refrigeration system (2) comprises a first compressor (21), a first oil-liquid separator (22) and a first condenser (23) which are sequentially connected, the first compressor (21) is further connected with a liquid storage tank (5), and the other end of the liquid storage tank (5) is connected with an external evaporator; the secondary refrigeration system comprises a second compressor (31), a second oil-liquid separator (32) and a second condenser (33) which are connected in sequence, and the first condenser (23) and the second condenser (33) are both connected with the plate heat exchanger (4).
2. The cascade refrigeration system of claim 1, wherein: a check valve (24) is arranged between the first compressor (21) and the first oil-liquid separator (22).
3. The cascade refrigeration system of claim 1, wherein: the liquid storage tank (5) is provided with a first pressure sensor (51).
4. The cascade refrigeration system of claim 1, wherein: and a second pressure sensor (25) is arranged between the first condenser (23) and the plate heat exchanger (4).
5. The cascade refrigeration system of claim 1, wherein: and the water inlet ends of the first condenser (23) and the second condenser (33) are respectively provided with a filter (6).
6. The cascade refrigeration system according to claim 1, wherein: the front end of the case (1) is provided with a control cabinet (11), and the control cabinet (11) is provided with a control panel (12).
7. The cascade refrigeration system of claim 1, wherein: the case (1) is also provided with an exhaust fan (13) used for radiating the equipment.
8. The cascade refrigeration system of claim 1, wherein: the heat exchanger is characterized in that the case (1) is a double-layer case, and the first condenser (23), the second condenser (33) and the plate heat exchanger (4) are arranged on the upper layer of the case (1).
9. A cascade refrigeration unit according to any one of claims 1 to 8, wherein: and a drying filter (34) is arranged between the second condenser (33) and the plate heat exchanger (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222613825.3U CN218210160U (en) | 2022-09-30 | 2022-09-30 | Cascade refrigerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222613825.3U CN218210160U (en) | 2022-09-30 | 2022-09-30 | Cascade refrigerating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218210160U true CN218210160U (en) | 2023-01-03 |
Family
ID=84639224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222613825.3U Active CN218210160U (en) | 2022-09-30 | 2022-09-30 | Cascade refrigerating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218210160U (en) |
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2022
- 2022-09-30 CN CN202222613825.3U patent/CN218210160U/en active Active
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