CN117346370A - Cascade refrigerator capable of improving refrigerating capacity and compact in structure - Google Patents
Cascade refrigerator capable of improving refrigerating capacity and compact in structure Download PDFInfo
- Publication number
- CN117346370A CN117346370A CN202311229008.0A CN202311229008A CN117346370A CN 117346370 A CN117346370 A CN 117346370A CN 202311229008 A CN202311229008 A CN 202311229008A CN 117346370 A CN117346370 A CN 117346370A
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- Prior art keywords
- temperature
- level
- low
- subcooler
- heat exchanger
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- 239000002184 metal Substances 0.000 claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 40
- 238000009413 insulation Methods 0.000 claims abstract description 23
- 229920000742 Cotton Polymers 0.000 claims abstract description 22
- 238000005187 foaming Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 28
- 229910052802 copper Inorganic materials 0.000 claims description 28
- 239000010949 copper Substances 0.000 claims description 28
- 238000003466 welding Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 9
- 238000007789 sealing Methods 0.000 abstract description 7
- 238000004321 preservation Methods 0.000 abstract description 4
- 239000003507 refrigerant Substances 0.000 description 39
- 238000005057 refrigeration Methods 0.000 description 28
- 238000009434 installation Methods 0.000 description 19
- 239000007788 liquid Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000001816 cooling Methods 0.000 description 10
- 238000004781 supercooling Methods 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000013526 supercooled liquid Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/17—Size reduction
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a cascade refrigerator capable of improving refrigerating capacity and having a compact structure, which comprises a refrigerating unit module, wherein the refrigerating unit module comprises a sheet metal bracket, a high-temperature-level subcooler and a low-temperature-level subcooler, wherein the high-temperature-level subcooler and the low-temperature-level subcooler are arranged on the sheet metal bracket; one end of the low-temperature-level subcooler is connected with the first heat exchanger, the other end of the low-temperature-level subcooler is connected with the low-temperature-level drying filter and then is connected with the low-temperature-level capillary tube, the low-temperature-level capillary tube is connected with the second heat exchanger, and the second heat exchanger is connected with the low-temperature-level subcooler; six surfaces of the sheet metal bracket are fixedly coated with sheet heat insulation cotton through screws to form a foaming sealing heat-insulation refrigerating unit module. The invention meets the requirements of high refrigerating capacity and compact overall structure on the premise of ensuring the heat preservation effect, and reduces the occupied space.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a cascade refrigerator which can improve the refrigerating capacity and has a compact structure.
Background
In industry, in order to meet the requirements of production process, scientific research and the like, a vapor compression type low-temperature cascade refrigeration cycle device is generally adopted to obtain a lower evaporation temperature (generally used for preparing a low temperature of minus 60 ℃ to minus 120 ℃). Such cascade refrigerators generally consist of two separate refrigeration systems, referred to as a high temperature stage and a low temperature stage, respectively. Because the compressor type water chiller of the cascade refrigeration system has two or more compressors, the number of matched parts such as corresponding refrigeration is correspondingly increased, the number and complexity of refrigerant pipelines are correspondingly increased, special bending design of a secondary refrigerant loop is required to be adopted, and the number of the multistage heat exchangers and the pipelines is increased in multiple, but the space of the conventional heat-insulating cotton is increased or the conventional heat-insulating cotton cannot be reliably installed aiming at the independent pipelines; on the other hand, because the required low temperature limit is higher, the performance requirement can be met by combining a plurality of heat exchangers with compressors at different levels at high and low temperatures, and the heat preservation effect and the compactness of the structural space of the refrigeration circuit become a problem.
The conventional refrigeration structure needs to wrap various heat exchangers and related connecting copper pipes respectively by using heat preservation cotton with a certain thickness (generally more than 3 cm), so that the heat preservation and insulation effects are achieved, the space between the plate heat exchangers needs to be large enough, on one hand, the structural appearance size is large, and more installation and placement space is needed; on the other hand, the connecting path between the pipelines is forced to be lengthened, the pressure loss in the pipeline is further increased, the refrigeration performance is influenced, and meanwhile, the refrigeration loss of the pipeline wall is also reduced in proportion to the lengthening of the pipeline, so that the refrigeration capacity is obviously reduced.
Disclosure of Invention
The invention mainly aims to solve the problem that the conventional cascade refrigerator cannot achieve both the refrigerating effect and the compactness of the structure, and provides a cascade refrigerator capable of improving the refrigerating capacity and having a compact structure, which comprises a foaming sealing heat-insulating refrigerating unit module, wherein the refrigerating unit module comprises a sheet metal bracket coated with sheet-shaped heat-insulating cotton and a multi-stage heat exchanger arranged on the sheet metal bracket, so that the heat-insulating cotton is prevented from being coated on various heat exchangers and related connecting copper pipes, the requirements of high refrigerating capacity and compact structure are met on the premise of ensuring the heat-insulating effect, the welding difficulty of a pipeline is effectively reduced, the occupied space area is reduced, the reliability of the compressor and the pipeline structure is improved, and the service life of the refrigerator is prolonged; by adopting the refrigeration unit module structure, the assembly type installation can be realized, so that the production and the installation are more flexible and convenient, and the transportation and the disassembly of a large number of complete machines in the production and the installation are reduced.
In order to achieve the above object, the present invention adopts the following technical scheme.
The cascade refrigerator comprises a refrigeration unit module, wherein the refrigeration unit module comprises a sheet metal bracket, a high-temperature-level subcooler and a low-temperature-level subcooler, wherein the high-temperature-level subcooler and the low-temperature-level subcooler are arranged on the sheet metal bracket, the high-temperature-level subcooler is connected with a high-temperature-level dry filter, the high-temperature-level dry filter is connected with a high-temperature-level capillary tube and then is connected with a first heat exchanger, and the first heat exchanger is connected with the high-temperature-level subcooler; one end of the low-temperature-level subcooler is connected with the first heat exchanger, the other end of the low-temperature-level subcooler is connected with the low-temperature-level drying filter and then is connected with the low-temperature-level capillary tube, the low-temperature-level capillary tube is connected with the second heat exchanger, and the second heat exchanger is connected with the low-temperature-level subcooler; six surfaces of the sheet metal bracket are fixedly coated with sheet heat insulation cotton through screws to form a foaming sealing heat-insulation refrigerating unit module. The invention provides a cascade refrigerator capable of improving refrigerating capacity and having a compact structure, which comprises a refrigerating unit module, wherein the refrigerating unit module comprises a sheet metal bracket coated with sheet-shaped heat insulation cotton and a multi-stage plate heat exchanger arranged on the sheet metal bracket, on one hand, the sheet-shaped heat insulation cotton is fixedly coated on six sides of the sheet metal bracket through screws to form the foaming sealing heat insulation refrigerating unit module, the heat insulation cotton is prevented from being coated on various heat exchangers and related connecting copper pipes, the pipeline welding difficulty is effectively reduced, the reliability of a pipeline structure is improved, the multi-stage plate heat exchanger has a compact structure, the occupied space area is reduced, meanwhile, the path length of the pipeline is reduced, and the multi-stage heat exchanger is combined with a high-low temperature compressor, so that the high refrigerating capacity cooling requirement comprising but not limited by-60 ℃ to 200 ℃ accurate temperature control can be met, and the whole compact structure requirement is met on the premise of guaranteeing the heat insulation effect; on the other hand, by adopting the refrigeration unit module structure, the assembly type installation can be realized, so that the production and the installation are more flexible and convenient, and the transportation and the disassembly of a large number of complete machines in the production and the installation are reduced.
Preferably, the high-temperature-stage heat exchanger is connected with the high-temperature-stage subcooler through a copper pipe, and the air-cooled heat exchanger is connected with the high-temperature-stage subcooler. The high-temperature-level compressor is used for leading high-temperature and high-pressure refrigerant gas into the air-cooled heat exchanger through a copper pipe, reducing the temperature of the refrigerant in the air-cooled heat exchanger through air cooling, changing the refrigerant into high-pressure normal-temperature liquid, filtering the high-temperature-level liquid through a high-temperature-level supercooler, leading the high-temperature-level liquid to enter a high-temperature-level capillary after being supercooled through a high-temperature-level drying filter, leading the high-temperature-level liquid to enter a first heat exchanger (condensing evaporator) after being throttled, evaporated and decompressed through the high-temperature-level capillary, changing the refrigerant after the high-temperature-level capillary absorbs heat and reduces the temperature into gas, returning the gas from the first heat exchanger (condensing evaporator) to the high-temperature-level supercooler, and leading the refrigerant to be sucked back by the high-temperature-level compressor after passing through an outlet of the high-temperature-level supercooler. The above arrangement reduces the temperature of the refrigerant entering the first heat exchanger (condensing evaporator) by the supercooling action of the high-temperature-stage subcooler, and changes the refrigerant into a supercooled liquid refrigerant. The invention provides more refrigerating capacity for the phase-change refrigeration of the refrigerant without increasing heat exchange power and condenser power.
Preferably, the low-temperature-stage heat exchanger further comprises a low-temperature-stage compressor, one end of the low-temperature-stage compressor is connected with the low-temperature-stage subcooler, and the other end of the low-temperature-stage compressor is connected with the first heat exchanger through a copper pipe. The low-temperature-level compressor is used for similarly supercooling high-temperature and high-pressure refrigerant through a first heat exchanger (a condensing evaporator) to be changed into high-pressure and low-temperature gas, the high-pressure refrigerant enters the low-temperature-level supercooler to be further supercooled, the high-pressure refrigerant is further cooled, the high-pressure refrigerant is converted into high-pressure and low-temperature liquid and then filtered by a low-temperature-level drying filter, and the low-temperature-level capillary tube is used for evaporating, absorbing heat and cooling, the refrigerant is evaporated to become gas, the evaporated gas is continuously evaporated and absorbed by a cooling heat source outside connected with a second heat exchanger, and cold and hot neutralization exchange is carried out, so that the cooling performance requirement of the cooled heat source is realized. The neutralized refrigerant in the second heat exchanger flows back into the low-temperature-stage subcooler from the second heat exchanger, and is sucked back by the low-temperature-stage compressor after being superheated by the low-temperature-stage subcooler. The overheat of the low temperature level subcooler heats the refrigerant before entering the low temperature level compressor, protects the low temperature level compressor, prevents the low temperature level compressor from liquid impact risk, and increases the reliability and service life of the low temperature level compressor.
Preferably, the high-temperature-level subcooler, the low-temperature-level subcooler, the first heat exchanger and the second heat exchanger are respectively provided with nails on the back surfaces and are respectively arranged on the corresponding positions of the sheet metal bracket through nuts. According to the invention, the multistage subcooler and the multistage heat exchanger are arranged in the metal plate bracket, and the sheet-shaped heat insulation cotton is coated on the metal plate bracket, so that the heat insulation cotton is prevented from being coated on various heat exchangers and related connecting copper pipes, and the multistage plate heat exchanger has a compact structure and small occupied space.
Preferably, the refrigeration unit module comprises a support plate, wherein the metal plate support is provided with a bulge and a groove locating feature which are correspondingly matched with each other, the metal plate support is correspondingly provided with a plurality of screw holes and screw reaming holes, and when the installation position is correct, the metal plate support is fixedly arranged on the support plate through the cooperation of a plurality of screws and the screw reaming holes and screw reaming holes. The invention adopts the refrigeration unit module, can meet the installation of module assemblies, reduces the transportation of a large number of complete machines and the related disassembly in the production, and has more flexible production and installation aspects.
Preferably, the sheet metal bracket is also provided with a foaming bracket. The refrigeration loop is arranged and fixed on the foaming heat-preserving bracket. The bracket structure is convenient for welding and installing all parts.
Preferably, the components in the refrigerator are connected through copper pipes. The heat exchangers and the supercoolers are respectively connected and communicated through copper pipes; and each drying filter and each capillary tube are respectively connected to the corresponding positions of the copper tubes.
Preferably, the air-cooled heat exchanger is provided with a fan in a matching way. The matched fan changes high-pressure high-temperature gas conveyed from the high-temperature-stage compressor in the copper pipe into high-pressure high-temperature liquid through the radiating fins.
Preferably, welded joints are reserved on four copper pipelines connected with the high-temperature-level compressor and the low-temperature-level compressor of the refrigeration unit module. The refrigerating unit module can be independently foamed and sealed, and the corresponding welding port is an external connecting port of the pipeline.
Preferably, the first heat exchanger is a condensation evaporator. The high temperature stage and the low temperature stage of the cascade refrigerator are connected through the condensing evaporator.
Therefore, the invention has the advantages that:
(1) The six surfaces of the sheet metal bracket are fixed with coated sheet heat insulation cotton through screws to form a foaming sealing heat-insulation refrigerating unit module, the heat insulation cotton is prevented from being coated on various heat exchangers and related connecting copper pipes, the welding difficulty of pipelines is effectively reduced, the reliability of the pipeline structure is improved, the multistage plate heat exchanger is compact in structure, the occupied space area is reduced, meanwhile, the path length of the pipelines is reduced, and the high-low temperature compressors are combined through the plurality of heat exchangers, so that the high refrigerating capacity cooling requirement comprising but not limited to accurate temperature control at-60 ℃ to 200 ℃ can be met, and the requirements of high refrigerating capacity and compact overall structure are met on the premise of guaranteeing the heat insulation effect;
(2) The refrigeration unit module structure is adopted, so that the assembly type installation can be realized, the production and the installation are more flexible and convenient, and a large number of complete machine transportation and disassembly in the production and the installation are reduced;
(3) The supercooling effect of the high-temperature-stage supercooler reduces the temperature of the refrigerant entering the first heat exchanger, so that the refrigerant is changed into supercooled liquid refrigerant, and more refrigerating capacity is provided for phase-change refrigeration of the refrigerant under the condition that the heat exchange power and the condenser power are not increased;
(4) The overheat of low temperature level subcooler heats the refrigerant before entering the low temperature level compressor, protects the low temperature level compressor, prevents the low temperature level compressor from having liquid impact risk, increases the reliability and the service life of the low temperature level compressor.
Drawings
Fig. 1 is a schematic structural diagram of a cascade refrigerator capable of improving refrigerating capacity and having a compact structure in an embodiment of the present invention.
Fig. 2 is an enlarged view of a portion a of fig. 1 in an embodiment of the present invention.
Fig. 3 is a schematic diagram of a cascade refrigerator with improved refrigerating capacity and compact structure according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a cascade refrigerator after assembling a refrigeration unit module according to an embodiment of the present invention.
1. The high-temperature-stage compressor 2, the copper pipe 3, the air-cooled heat exchanger 4, the high-temperature-stage dry filter 5, the high-temperature-stage subcooler 6, the fan 7, the low-temperature-stage dry filter 8, the high-temperature-stage capillary tube 9, the first heat exchanger 10, the foaming bracket 11, the low-temperature-stage subcooler 12, the second heat exchanger 13, the sheet-like heat-insulating cotton 14, the sheet metal bracket 15, the supporting plate 16, the low-temperature-stage capillary tube 17, the low-temperature-stage compressor 18 and the refrigerating unit module.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
The cascade refrigerator capable of improving the refrigerating capacity and having a compact structure is shown in fig. 1 and 4, and comprises a refrigerating unit module 18, wherein the refrigerating unit module 18 comprises a sheet metal bracket 14, and a high-temperature-stage subcooler 5 and a low-temperature-stage subcooler 11 which are arranged on the sheet metal bracket 14, the high-temperature-stage subcooler 5 is connected with a high-temperature-stage dry filter 4, the high-temperature-stage dry filter 4 is connected with a high-temperature-stage capillary tube 8 and then is connected with a first heat exchanger 9, and the first heat exchanger 9 is connected with the high-temperature-stage subcooler 5; one end of the low-temperature-level subcooler 11 is connected with the first heat exchanger 9, the other end of the low-temperature-level subcooler 11 is connected with the low-temperature-level dry filter 7 and then is connected with the low-temperature-level capillary tube 16, the low-temperature-level capillary tube 16 is connected with the second heat exchanger 12, and the second heat exchanger 12 is connected with the low-temperature-level subcooler 11; six surfaces of the sheet metal bracket 14 are fixedly coated with sheet-shaped heat insulation cotton 13 through screws to form a foaming sealing heat-insulation refrigerating unit module 18. The invention provides a cascade refrigerator capable of improving refrigerating capacity and having a compact structure, which comprises a refrigerating unit module 18, wherein the refrigerating unit module 18 comprises a sheet metal bracket 14 coated with sheet-shaped heat insulation cotton 13 and a plurality of stages of plate heat exchangers arranged on the sheet metal bracket 14, on one hand, the sheet heat insulation cotton 13 is fixedly coated on six sides of the sheet metal bracket 14 through screws to form the foaming sealing heat-insulating refrigerating unit module 18, the heat-insulating cotton is prevented from being used for coating various heat exchangers and related connecting copper pipes 2, the welding difficulty of pipelines is effectively reduced, the reliability of the pipeline structure is improved, the structure of the multistage plate heat exchanger is compact, the occupied space area is reduced, meanwhile, the path length of the pipelines is reduced, and the high-low temperature all-stage compressors are jointly matched through a plurality of heat exchangers, so that the requirements of high refrigerating capacity including but not limited to-60 ℃ accurate temperature control can be met, and the compact requirement of the whole structure is satisfied on the premise of guaranteeing the heat-insulating effect; on the other hand, by adopting the structure of the refrigeration unit module 18, the assembly type installation can be realized, so that the production and the installation are more flexible and convenient, and a large number of complete machine transportation and disassembly in the production and the installation are reduced.
As shown in fig. 3 and 4, the high-temperature-stage compressor 1 is further included, one end of the high-temperature-stage compressor 1 is connected with the high-temperature-stage subcooler 5, the other end of the high-temperature-stage compressor 1 is connected with the air-cooled heat exchanger 3 through the copper pipe 2, and the air-cooled heat exchanger 3 is connected with the high-temperature-stage subcooler 5. The high-temperature-stage compressor 1 is used for introducing high-temperature and high-pressure refrigerant gas into the air-cooled heat exchanger 3 through the copper pipe 2, reducing the temperature of the refrigerant in the air-cooled heat exchanger 3 through air cooling, changing the refrigerant into high-pressure normal-temperature liquid, filtering the high-temperature-stage liquid through the high-temperature-stage subcooler 5, then entering the high-temperature-stage capillary tube 8 after being subjected to supercooling, throttling, evaporating and depressurization through the high-temperature-stage capillary tube 8, entering the first heat exchanger 9 (condensing evaporator), evaporating the refrigerant subjected to heat absorption and temperature reduction through the high-temperature-stage capillary tube 8, changing the refrigerant into gas, returning the gas from the first heat exchanger 9 (condensing evaporator) into the high-temperature-stage subcooler 5, performing heat exchange through the high-temperature-stage subcooler 5, and returning the refrigerant through the outlet of the high-temperature-stage subcooler 5 by the high-temperature-stage compressor 1. The above arrangement reduces the temperature of the refrigerant entering the first heat exchanger 9 (condensing evaporator) by the supercooling action of the high-temperature-stage subcooler 5, and changes the refrigerant into a supercooled liquid refrigerant. The invention provides more refrigerating capacity for the phase-change refrigeration of the refrigerant without increasing heat exchange power and condenser power.
As shown in fig. 3 and 4, the low-temperature-stage compressor 17 is further included, one end of the low-temperature-stage compressor 17 is connected with the low-temperature-stage subcooler 11, and the other end of the low-temperature-stage compressor 17 is connected with the first heat exchanger 9 through the copper pipe 2. The low-temperature-level compressor 17 converts the high-temperature and high-pressure refrigerant into high-pressure and low-temperature gas through the supercooling of the first heat exchanger 9 (condensing evaporator), the high-pressure and low-temperature gas enters the low-temperature-level supercooler 11 for further supercooling, the high-pressure refrigerant is further cooled, the high-pressure refrigerant is converted into high-pressure and low-temperature liquid and filtered by the low-temperature-level drying filter 7, the low-temperature-level capillary tube 16 evaporates and absorbs heat for cooling, the refrigerant evaporates and becomes gas, the evaporated gas is continuously connected with the second heat exchanger 12 and is evaporated and absorbed by a cooling heat source, and the cold and hot neutralization exchange is performed, so that the cooling performance requirement of the cooled heat source is realized. The neutralized refrigerant in the second heat exchanger 12 flows back into the low-temperature-stage subcooler 11 from the second heat exchanger 12, and is sucked back by the low-temperature-stage compressor 17 after being superheated in the low-temperature-stage subcooler 11. The superheating action of the low-temperature-stage subcooler 11 heats the refrigerant before entering the low-temperature-stage compressor 17, protects the low-temperature-stage compressor 17, prevents the low-temperature-stage compressor 17 from liquid impact risk, and increases the reliability and service life of the low-temperature-stage compressor 17.
The high-temperature-level supercooler 5, the low-temperature-level supercooler 11, the first heat exchanger 9 and the second heat exchanger 12 are respectively provided with nails on the back surfaces and are respectively arranged on the corresponding positions of the sheet metal bracket 14 through nuts. According to the invention, the multistage subcooler and the multistage heat exchanger are arranged in the sheet metal bracket 14, and the sheet metal bracket 14 is coated with the sheet-shaped heat insulation cotton 13, so that the heat insulation cotton is prevented from being coated on various heat exchangers and related connecting copper pipes 2, and the multistage plate heat exchanger has a compact structure and small occupied space.
As shown in fig. 2, the metal plate bracket 14 and the support plate 15 are provided with corresponding matched convex and groove positioning features, the metal plate bracket 14 and the support plate 15 are correspondingly provided with a plurality of screw holes and screw reamers, after the installation position is correct, the refrigeration unit module 18 containing the sheet metal bracket 14 is fixedly installed on the supporting plate 15 through the cooperation of a plurality of screws, screw holes and screw reaming. The invention adopts the refrigeration unit module 18, can meet the installation of module assemblies, reduces the transportation of a large number of complete machines and the related disassembly in the production, and has more flexible production and installation aspects.
As shown in fig. 2, the sheet metal bracket 14 is further provided with a foam bracket 10. The refrigeration loop is arranged and fixed on the foaming heat-preserving bracket. The bracket structure is convenient for welding and installing all parts.
The components in the refrigerator are connected through copper pipes 2. The heat exchangers and the supercoolers are respectively connected and communicated through copper pipes 2; the drying filters and the capillaries are respectively connected to the corresponding positions of the copper pipe 2.
As shown in fig. 4, the air-cooled heat exchanger 3 is provided with a fan 6. The matched fan 6 changes the high-pressure high-temperature gas conveyed from the high-temperature stage compressor 1 in the copper pipe 2 into high-pressure high-temperature liquid through the radiating fins.
Four copper pipelines of the refrigerating unit module 18 connected with the high-temperature-stage compressor 1 and the low-temperature-stage compressor 17 are provided with welding ports. The refrigeration unit module 18 can be individually foamed and sealed, and the corresponding welded joint is a pipeline external joint.
The first heat exchanger 9 is a condensing evaporator. The high temperature stage and the low temperature stage of the cascade refrigerator are connected through the condensing evaporator.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The cascade refrigerator capable of improving the refrigerating capacity and having a compact structure is characterized by comprising a refrigerating unit module, wherein the refrigerating unit module comprises a sheet metal bracket, a high-temperature-level subcooler and a low-temperature-level subcooler, wherein the high-temperature-level subcooler and the low-temperature-level subcooler are arranged on the sheet metal bracket, the high-temperature-level subcooler is connected with a high-temperature-level dry filter, the high-temperature-level dry filter is connected with a high-temperature-level capillary tube and then is connected with a first heat exchanger, and the first heat exchanger is connected with the high-temperature-level subcooler; one end of the low-temperature-level subcooler is connected with the first heat exchanger, the other end of the low-temperature-level subcooler is connected with the low-temperature-level drying filter and then is connected with the low-temperature-level capillary tube, the low-temperature-level capillary tube is connected with the second heat exchanger, and the second heat exchanger is connected with the low-temperature-level subcooler; six faces of the sheet metal bracket are fixedly coated with sheet-shaped heat insulation cotton through screws.
2. The cascade refrigerator capable of improving refrigerating capacity and being compact in structure as claimed in claim 1, further comprising a high-temperature-stage compressor, wherein one end of the high-temperature-stage compressor is connected with the high-temperature-stage subcooler, the other end of the high-temperature-stage compressor is connected with an air-cooled heat exchanger through a copper pipe, and the air-cooled heat exchanger is connected with the high-temperature-stage subcooler.
3. The cascade refrigerator capable of improving refrigerating capacity and being compact in structure as claimed in claim 1, further comprising a low-temperature-stage compressor, wherein one end of the low-temperature-stage compressor is connected with the low-temperature-stage subcooler, and the other end of the low-temperature-stage compressor is connected with the first heat exchanger through a copper pipe.
4. The cascade refrigerator capable of improving refrigerating capacity and being compact in structure as claimed in claim 1, wherein the high-temperature-level subcooler, the low-temperature-level subcooler, the first heat exchanger and the second heat exchanger are respectively provided with nails on the back surfaces and are respectively arranged on the corresponding positions of the sheet metal bracket through nuts.
5. The cascade refrigerator capable of improving refrigerating capacity and being compact in structure according to claim 1 or 4, further comprising a supporting plate, wherein the sheet metal support and the supporting plate are provided with corresponding matched protruding and groove locating features, the sheet metal support and the supporting plate are correspondingly provided with a plurality of screw holes and screw reaming holes, and the refrigerating unit module is fixedly arranged on the supporting plate through a plurality of screws.
6. The cascade refrigerator capable of improving refrigerating capacity and being compact in structure as claimed in claim 1, wherein the sheet metal bracket is further provided with a foaming bracket.
7. The cascade refrigerator of claim 1, wherein the components of the refrigerator are connected by copper pipes.
8. The cascade refrigerator with improved refrigerating capacity and compact structure as recited in claim 1, wherein the air-cooled heat exchanger is provided with a fan in a matched manner.
9. A cascade refrigerator with improved refrigerating capacity and compact structure according to claim 1, 2 or 3, wherein the four copper pipelines of the refrigerating unit module connected with the high-temperature-level compressor and the low-temperature-level compressor are provided with welding ports.
10. The cascade refrigerator of claim 1, wherein the first heat exchanger is a condensing evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311229008.0A CN117346370A (en) | 2023-09-22 | 2023-09-22 | Cascade refrigerator capable of improving refrigerating capacity and compact in structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311229008.0A CN117346370A (en) | 2023-09-22 | 2023-09-22 | Cascade refrigerator capable of improving refrigerating capacity and compact in structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117346370A true CN117346370A (en) | 2024-01-05 |
Family
ID=89370200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311229008.0A Pending CN117346370A (en) | 2023-09-22 | 2023-09-22 | Cascade refrigerator capable of improving refrigerating capacity and compact in structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117346370A (en) |
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2023
- 2023-09-22 CN CN202311229008.0A patent/CN117346370A/en active Pending
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