CN112013560A - MRC second grade compression mixes heat preservation device for refrigeration - Google Patents
MRC second grade compression mixes heat preservation device for refrigeration Download PDFInfo
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- CN112013560A CN112013560A CN202010873511.XA CN202010873511A CN112013560A CN 112013560 A CN112013560 A CN 112013560A CN 202010873511 A CN202010873511 A CN 202010873511A CN 112013560 A CN112013560 A CN 112013560A
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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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
- F25B41/00—Fluid-circulation arrangements
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention belongs to the field of compression refrigeration equipment, and particularly relates to a heat preservation device for MRC two-stage compression mixed refrigeration; comprises a circulating component, a heat preservation component and a detection component; the circulating assembly, the heat preservation assembly and the detection assembly are all arranged into columnar structures; a first electromagnetic valve is arranged in the circulating assembly; the heat insulation assembly is arranged at the upper end of the circulating assembly, a third cavity and a fourth cavity are arranged in the heat insulation assembly, and the third cavity and the fourth cavity are isolated from each other; the heat preservation device is added into the existing two-stage compression refrigeration system, and the heat preservation device and a compression link in the two-stage compression refrigeration system can form a group of open-close type loops, and after the two-stage compression refrigeration system stops working, the open-close type loops operate to compress and store compressed gas in the loops, so that the refrigeration system can be started to be used at any time, preheating is not needed, and the use is rapid.
Description
Technical Field
The invention belongs to the field of compression refrigeration equipment, and particularly relates to a heat preservation device for MRC two-stage compression mixed refrigeration.
Background
The two-stage compression refrigeration is realized by dividing the compression process into two times, namely, low-pressure refrigerant vapor output from an evaporator is compressed to intermediate pressure by a low-pressure compressor, and then is compressed to condensing pressure by a high-pressure compressor.
The existing two-stage compression refrigeration system consists of an evaporator, a condenser, an intercooler, a low-pressure compressor and a high-pressure compressor, and the working flow is as follows: the steam flowing out of the evaporator is sucked by the low-pressure compressor, compressed to the intermediate pressure and mixed with the dry saturated steam flowing out of the intercooler in the pipeline, so that the superheated steam discharged from the low-pressure machine enters the high-pressure compressor after being cooled, enters the condenser after being compressed to the condensation pressure, the condensed high-pressure refrigerant liquid enters the serpentine coil of the intercooler for recooling, and finally enters the evaporator through the throttle valve for heat absorption and evaporation.
After the existing secondary compression refrigerator is stopped, uncompressed gas can be reserved in the pipeline, and when the pipeline is opened again for use after the pipeline is stopped for a period of time, the gas in the pipeline needs to be recompressed and preheated, so that the pipeline cannot be used immediately, and the working efficiency is influenced.
Disclosure of Invention
Aiming at the problems, the invention provides a heat preservation device for MRC two-stage compression mixed refrigeration, which comprises a circulation component, a heat preservation component and a detection component;
the circulating assembly, the heat preservation assembly and the detection assembly are all arranged into columnar structures;
a first electromagnetic valve is arranged in the circulating assembly;
the heat insulation assembly is arranged at the upper end of the circulating assembly, a third cavity and a fourth cavity are arranged in the heat insulation assembly, the third cavity and the fourth cavity are isolated from each other, and the third cavity and the fourth cavity are symmetrically arranged by taking the central axis of the heat insulation assembly as a symmetrical line;
one end of the first electromagnetic valve is communicated with the third cavity through one group of first connecting pipes, the other end of the first electromagnetic valve is communicated with the fourth cavity through the other group of first connecting pipes, and the joints of the two groups of first connecting pipes and the heat insulation assembly are arranged in a sealing mode;
the detection assembly is fixedly arranged at the upper end of the heat insulation assembly, the detection assembly and the heat insulation assembly are in sealing fit, and a first air pressure sensor and a second air pressure sensor are arranged in the detection assembly;
the detection end of the first air pressure sensor penetrates through one end of the detection assembly and is positioned in the third cavity; the detection end of the second air pressure sensor penetrates through one end of the detection assembly and is positioned in the fourth cavity; the connection parts of the detection ends of the two groups of air pressure sensors and the detection assembly are hermetically arranged;
the first electromagnetic valve is electrically connected with the first air pressure sensor and the second air pressure sensor.
Further, the circulation assembly includes a base;
the base is of a columnar structure, a first cavity is formed in the base, and the first electromagnetic valve is arranged in the first cavity;
the two groups of first connecting pipes are arranged above the base, and the central axes of the two groups of first connecting pipes are vertical to the upper surface of the base;
one ends of the two groups of first connecting pipes penetrate through the upper end of the base and are located in the first cavity, and one ends of the two groups of first connecting pipes located in the first cavity are respectively communicated with the output end and the output end of the first electromagnetic valve.
Furthermore, an access hole is formed in the side wall of the base;
the access hole is communicated with the first cavity, two sets of access doors are hinged in the access hole and are symmetrically arranged and two sets of access doors can be connected through a first buckle.
Further, the heat preservation assembly comprises a first shell, a partition plate and two groups of second shells;
the first shell and the two groups of second shells are both arranged into a columnar structure, and one ends of the first shell and one ends of the two groups of second shells are both arranged into an open structure;
the first shell is sleeved outside the two groups of second shells, one ends of the open structures of the first shell and the two groups of second shells are positioned on the same plane and have the same direction, and the three groups of shells are not attached to each other;
the baffle is fixedly clamped between the three groups of shells, and one end of the baffle close to the opening of the open structure of the three groups of shells is positioned between the two axial ends of the shells.
Furthermore, a closed cavity formed by the partition plate, the first shell and the two groups of second shells is set as a second cavity, and the second cavity is set as a vacuum cavity;
and an open cavity formed by the partition plate, the first shell and the two groups of second shells is a clamping groove.
Furthermore, one end surface of the first shell is parallel to the upper surface of the base, and a third cavity and a fourth cavity are respectively arranged in the two groups of second shells;
two groups of fixed tubes are arranged between the first shell and the two groups of second shells, the central axis of each fixed tube is superposed with the central axis of the first connecting tube, and the inner diameter of each fixed tube is not smaller than the outer diameter of the first connecting tube;
two ends of the two groups of fixed tubes respectively penetrate through one end of the first shell and one end of the two groups of second shells, and the two groups of fixed tubes are respectively communicated with the third cavity and the fourth cavity;
the two groups of fixed pipes are respectively sleeved on the two groups of first connecting pipes, and the joints of the fixed pipes and the first connecting pipes are arranged in a sealing manner.
Furthermore, a second connecting pipe, a third connecting pipe, a fourth connecting pipe and a fifth connecting pipe are arranged outside the first shell;
one end of the second connecting pipe and one end of the fourth connecting pipe sequentially penetrate through the first shell and the group of second shells and are communicated with the third cavity;
one end of the third connecting pipe and one end of the fifth connecting pipe sequentially penetrate through the other group of second shells of the first shell and are communicated with the fourth cavity;
the four groups of connecting pipes are hermetically arranged at the connecting part of the four groups of connecting pipes penetrating through the shell.
Further, the detection assembly comprises a third shell and a lug;
the third shell is of a columnar structure with the same cross section as the first shell, and the first shell can be fixedly connected with the third shell through a second buckle;
the lug is arranged at one end of the third shell and can be clamped in the clamping groove, and the joint of the lug and the clamping groove is arranged in a sealing manner;
one end of the third shell, which is provided with the convex block, is attached to the openings of the third cavity and the fourth cavity.
Furthermore, a groove is formed in one end, far away from the bump, of the third shell, two groups of through holes are formed in the bottom surface of the groove, and the groove is communicated with the third cavity and the fourth cavity through the two groups of through holes respectively;
the first air pressure sensor and the second air pressure sensor are arranged in the groove;
the detection end of the first air pressure sensor penetrates through one group of through holes to be located inside the third cavity, the detection end of the second air pressure sensor penetrates through the other group of through holes to be located inside the fourth cavity, and the connection positions of the detection ends of the two groups of sensors and the two groups of through holes are arranged in a sealing mode.
Furthermore, a top cover is arranged at one end of the third shell, which is provided with the groove, and the top cover can be sleeved on the third shell.
The invention has the beneficial effects that:
1. the heat preservation device is added into the existing two-stage compression refrigeration system, and the heat preservation device and a compression link in the two-stage compression refrigeration system can form a group of open-close loops;
2. the circulating assembly, the heat insulation assembly and the detection assembly are assembled into the heat insulation device, and the circulating assembly and the detection assembly are both of an open-close type structure, so that the maintenance or replacement of electrical elements in the circulating assembly and the detection assembly is more convenient, and the heat insulation device is not required to be integrally disassembled;
3. the second hasps which are arranged in the annular array at equal intervals are used for fixedly connecting the heat insulation assembly and the detection assembly, the lower end of the detection assembly is required to be clamped in the heat insulation assembly, the structure combination is adopted to form an error-proof structure, and the detection assembly is more convenient and safer when being installed.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view showing the structure of a heat retaining device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an exemplary recycling assembly of the present invention;
FIG. 3 shows a schematic perspective view of an endless assembly according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an insulation assembly according to an embodiment of the present invention;
FIG. 5 is a schematic perspective view of an insulation assembly according to an embodiment of the present invention;
FIG. 6 shows an exploded view of a detection assembly in accordance with an embodiment of the present invention;
fig. 7 shows a schematic flow diagram of two-stage compression refrigeration according to an embodiment of the present invention.
In the figure: 1. a circulation component; 2. a heat preservation assembly; 3. a detection component; 4. a base; 401. a first cavity; 402. an access hole; 5. a first connecting pipe; 6. a first solenoid valve; 7. an access door; 8. a first buckle; 9. a first housing; 901. a second cavity; 10. a second housing; 1001. a third cavity; 1002. a fourth cavity; 11. a partition plate; 1101. a card slot; 12. a fixed tube; 13. a second connecting pipe; 14. a third connecting pipe; 15. a fourth connecting pipe; 16. a fifth connecting pipe; 17. a second buckle; 18. a third housing; 1801. a groove; 1802. a through hole; 19. a bump; 20. a first air pressure sensor; 21. a second air pressure sensor; 22. and a top cover.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a heat preservation device for MRC two-stage compression mixed refrigeration, which comprises a circulation component 1, a heat preservation component 2 and a detection component 3, and is shown in figure 1; the circulating assembly 1, the heat insulation assembly 2 and the detection assembly 3 are all arranged in a columnar structure, two groups of mutually isolated cavities are arranged in the heat insulation assembly 2, the two groups of cavities are symmetrically arranged by taking the central axis of the heat insulation assembly 2 as a symmetrical line, and the circulating assembly 1 is arranged at the lower end of the heat insulation assembly 2 and is used for circulating gas in the two groups of cavities in the heat insulation assembly 2; the detection assembly 3 is arranged at the upper end of the heat insulation assembly 2, the detection ends of the detection assembly 3 are respectively arranged in two groups of cavities in the heat insulation assembly 2, and the detection assembly 3 is used for measuring pressure values in the two groups of cavities in the heat insulation assembly 2.
In a conventional state, the interior of the circulating component 1 is closed, so that two groups of cavities in the heat-insulating component 2 are isolated from each other, and the gases in the two groups of cavities cannot flow through each other; the detection component 3 is used for detecting the pressure value in two sets of cavities respectively, and when the pressure difference in two sets of cavities reached the predetermined range, the detection component 3 can send a signal to the circulation component 1, and the circulation component 1 operates for two sets of cavities inside the heat preservation component 2 communicate, and the circulation is reached in the mutual circulation of the gas in two sets of cavities.
The circulating assembly 1 comprises a base 4 and a first electromagnetic valve 6, as shown in fig. 2 and 3, the base 4 is provided with a columnar structure, a first cavity 401 is arranged inside the base 4, and the first electromagnetic valve 6 is arranged in the first cavity 401; two groups of first connecting pipes 5 are arranged above the base 4, the central axes of the two groups of first connecting pipes 5 are perpendicular to the upper surface of the base 4, one ends of the two groups of first connecting pipes 5 penetrate through the upper end of the base 4 and are positioned in the first cavity 401, and one ends of the two groups of first connecting pipes 5 positioned in the first cavity 401 are respectively communicated with two ends of the first electromagnetic valve 6; the access hole 402 has been seted up on the lateral wall of base 4, access hole 402 and first cavity 401 intercommunication, it has two sets of access doors 7, two sets of to articulate in the access hole 402 access door 7 symmetry sets up, and is two sets of access door 7 accessible is connected by first hasp 8, and two sets of access doors 7 after connecting can be with first cavity 401 and base 4 outside isolated each other.
The two groups of first connecting pipes 5 are vertically arranged on the base 4, so that the heat insulation assembly 2 is convenient to install, and the bottom surface of the heat insulation assembly 2 is flat and convenient to place; through separately setting up circulation subassembly 1 and heat preservation subassembly 2, and accessible access door overhauls or maintains first solenoid valve 6, and follow-up maintenance is more convenient.
In practical use, the connection mode of the two groups of access doors 7 is not limited, and the access doors 7 can also be arranged as one group, and this embodiment is only an exemplary illustration.
The heat preservation assembly 2 comprises a first shell 9, a partition plate 11 and two groups of second shells 10, as shown in fig. 4 and 5; the first shell 9 and the two groups of second shells 10 are both arranged to be columnar structures, one ends of the first shell 9 and one end of the two groups of second shells 10 are both arranged to be open structures, the first shell 9 is sleeved outside the two groups of second shells 10, one ends of the open structures of the first shell 9 and the two groups of second shells 10 are located on the same plane and face the same direction, and the three groups of shells are not attached to each other; the partition plate 11 is fixedly clamped between the three groups of shells, and one end, close to the opening of the open structure of the three groups of shells, of the partition plate 11 is located between the two axial ends of the shells;
a closed cavity formed by the partition plate 11, the first shell 9 and the two groups of second shells 10 is set as a second cavity 901, and the second cavity 901 is set as a vacuum cavity; the open cavity that baffle 11, first casing 9 and two sets of second casings 10 constitute sets up to draw-in groove 1101, the one end joint of determine module 3 is in draw-in groove 1101, and the junction of determine module 3 and draw-in groove 1101 seals the setting, through five sets of second hasp 17 fixed connection between determine module 3 and the first casing 9, and five sets of second hasp 17 are the equidistant setting of annular array on the outer wall of first casing 9.
Through with baffle 11, the second cavity 901 that first casing 9 and two sets of second casings 10 constitute sets up to vacuum cavity, it is better to make the inside heat preservation effect of two sets of second casings 10, and heat can not conduct each other, through set up two sets of second casings 10 in first casing 9 is inside, it sets up five groups of second hasps 17 to be the equidistant annular array on first casing 9 outer wall, and but the joint of the one end of detecting component 3 is in draw-in groove 1101, make detecting component 3 position when the installation can not take place the mistake.
In practical use, the number of the second hasps 17 is not limited specifically, and the single hasp is set to ensure the anti-misloading effect, and the embodiment is only used for illustrative explanation here.
The surface of one end of the first shell 9 is parallel to the upper surface of the base 4, a third cavity 1001 and a fourth cavity 1002 are respectively arranged in two groups of second shells 10, two groups of fixed tubes 12 are arranged between the first shell 9 and the two groups of second shells 10, the central axis of each fixed tube 12 is overlapped with the central axis of the first connecting tube 5, the inner diameter of each fixed tube 12 is not smaller than the outer diameter of the first connecting tube 5, two ends of each group of fixed tubes 12 respectively penetrate through one end of the first shell 9 and one end of each group of second shells 10, and the two groups of fixed tubes 12 are respectively communicated with the third cavity 1001 and the fourth cavity 1002; the two groups of fixed pipes 12 are respectively sleeved on the two groups of first connecting pipes 5, the joints of the fixed pipes 12 and the first connecting pipes 5 are arranged in a sealing mode, and the input end and the output end of the first electromagnetic valve 6 are respectively communicated with the fourth cavity 1002 and the third cavity 1001 through the two groups of first connecting pipes 5.
A second connecting pipe 13, a third connecting pipe 14, a fourth connecting pipe 15 and a fifth connecting pipe 16 are arranged outside the first shell 9; one end of the second connecting pipe 13 and one end of the fourth connecting pipe 15 sequentially penetrate through the first shell 9 and the group of second shells 10 to be communicated with the third cavity 1001; one end of the third connecting pipe 14 and one end of the fifth connecting pipe 16 sequentially penetrate through another group of the second housings 10 of the first housing 9 to be communicated with the fourth cavity 1002, and the joints of the four groups of the connecting pipes and the penetrating housings are arranged in a sealing manner.
The detection assembly 3 comprises a third housing 18 and a projection 19, as shown in fig. 6; the third shell 18 is arranged to be a columnar structure with the same cross section as the first shell 9, and the first shell 9 can be fixedly connected with the third shell 18 through a second buckle 17; the bump 19 is arranged at one end of the third shell 18, when the third shell 18 is fixedly connected with the first shell 9 through the second buckle 17, the bump 19 is clamped in the clamping groove 1101, the joint of the bump 19 and the clamping groove 1101 is sealed, and one end of the third shell 18, which is provided with the bump 19, is attached to the openings of the third cavity 1001 and the fourth cavity 1002, so that the third cavity 1001 and the fourth cavity 1002 form a closed cavity; a groove 1801 is formed in one end, away from the bump 19, of the third housing 18, two groups of through holes 1802 are formed in the bottom surface of the groove 1801, and the groove 1801 is communicated with the third cavity 1001 and the fourth cavity 1002 through the two groups of through holes 1802; a first air pressure sensor 20 and a second air pressure sensor 21 are arranged in the groove 1801, the first air pressure sensor 20 and the second air pressure sensor 21 are both electrically connected with the first electromagnetic valve 6, the detection end of the first air pressure sensor 20 passes through one group of through holes 1802 and is positioned in the third cavity 1001, the detection end of the second air pressure sensor 21 passes through the other group of through holes 1802 and is positioned in the fourth cavity 1002, and the connection between the detection ends of the two groups of sensors and the two groups of through holes 1802 is sealed; a top cover 22 is arranged at one end of the third casing 18 provided with the groove 1801, and the top cover 22 can be sleeved on the third casing 18.
Through setting up two sets of baroceptors in third casing 18, with third casing 18 through second hasp 17 and first casing 9 fixed connection, the accessible top cap 22 is covered with it at the top recess 1801 opening part of third casing 18, and is more convenient when maintaining or changing the baroceptor in third casing 18, need not to dismantle third casing 18 whole.
In practical use, the connection manner of the first casing 9 and the third casing 18 is not particularly limited, and the embodiment is only used for exemplary illustration.
The heat preservation device is suitable for a multi-stage compression refrigeration system, and the embodiment of the invention is exemplarily illustrated by the two-stage compression refrigeration system, as shown in fig. 7; the two-stage compression refrigeration system comprises an evaporator, a condenser, an intercooler, a low-pressure compressor and a high-pressure compressor; the intercooler is communicated with the input end of the evaporator through a first pipeline, a first throttle valve is arranged on the first pipeline, the output end of the evaporator is communicated with the third cavity 1001 through a group of second pipelines, and a second electromagnetic valve is arranged on the group of second pipelines and used for controlling the circulation and closing of the group of second pipelines; the input end of the low-pressure compressor is communicated with the third cavity 1001 through another group of second pipelines; the output end of the low-pressure compressor is communicated with the input end of the high-pressure compressor through a third pipeline, and the third pipeline is communicated with the intercooler through a sixth pipeline; the output end of the high-pressure compressor is communicated with the fourth cavity 1002 through a group of fourth pipelines, a fourth electromagnetic valve is arranged on each group of fourth pipelines and used for controlling the circulation and closing of the group of fourth pipelines, the fourth cavity 1002 is communicated with the input end of the condenser through another group of fourth pipelines, a third electromagnetic valve is arranged on each group of fourth pipelines and used for controlling the circulation and closing of the group of fourth pipelines, the output end of the condenser is communicated with the intercooler through a fifth pipeline, and a second throttling valve is arranged on the fifth pipeline;
the second solenoid valve, the third solenoid valve and the fourth solenoid valve are electrically connected with the first solenoid valve 6.
Illustratively, when the two-stage compression refrigeration system is normally used, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are in a normally open state, the first electromagnetic valve 6 is in a normally closed state, the output end of the evaporator is communicated with the input end of the low-pressure compressor, and the output end of the high-pressure compressor is communicated with the input end of the condenser; when the two-stage compression refrigeration system stops working, the second electromagnetic valve and the third electromagnetic valve are closed, and the third cavity 1001, the low-pressure compressor, the high-pressure compressor and the fourth cavity 1002 form an open-close loop; the gas at the initial position of the loop enters the low-pressure compressor from the third cavity 1001, the gas is compressed by the low-pressure compressor and then enters the high-pressure compressor, the compressed gas enters the fourth cavity 1002, the temperature of the gas in the cavities is gradually reduced after a period of time, and the pressure of the gas in the cavities is changed;
when the air pressure difference value in the third cavity 1001 and the fourth cavity 1002 is higher than a preset range value, the first electromagnetic valve 6 and the fourth electromagnetic valve are closed; when the difference between the air pressures in third cavity 1001 and fourth cavity 1002 is lower than a predetermined range, first solenoid valve 6 and the fourth solenoid valve are opened, and the air in fourth cavity 1002 enters third cavity 1001 to perform the compression cycle again.
Through the structure, after the secondary compression refrigeration system stops working, gas between the evaporator and the condenser pipeline is compressed by the low-pressure compressor and the high-pressure compressor and then stored in the fourth cavity 1002, so that the refrigeration system can be started to enter the use at any time, preheating is not needed, and the use is rapid.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a MRC second grade compression mixes heat preservation device for refrigeration which characterized in that: comprises a circulating component (1), a heat preservation component (2) and a detection component (3);
the circulating assembly (1), the heat-insulating assembly (2) and the detection assembly (3) are all arranged into columnar structures;
a first electromagnetic valve (6) is arranged in the circulating assembly (1);
the heat insulation component (2) is arranged at the upper end of the circulating component (1), a third cavity (1001) and a fourth cavity (1002) are arranged in the heat insulation component (2), the third cavity (1001) and the fourth cavity (1002) are isolated from each other, and the third cavity (1001) and the fourth cavity (1002) are symmetrically arranged by taking the central axis of the heat insulation component (2) as a symmetry line;
one end of the first electromagnetic valve (6) is communicated with the third cavity (1001) through one group of first connecting pipes (5), the other end of the first electromagnetic valve (6) is communicated with the fourth cavity (1002) through the other group of first connecting pipes (5), and the connecting positions of the two groups of first connecting pipes (5) and the heat preservation assembly (2) are arranged in a sealing mode;
the detection assembly (3) is fixedly arranged at the upper end of the heat insulation assembly (2), the detection assembly and the heat insulation assembly are in sealing fit, and a first air pressure sensor (20) and a second air pressure sensor (21) are arranged in the detection assembly (3);
the detection end of the first air pressure sensor (20) penetrates through one end of the detection assembly (3) and is positioned in the third cavity (1001); one end of the detection end of the second air pressure sensor (21), which penetrates through the detection assembly (3), is positioned in the fourth cavity (1002); the connection parts of the detection ends of the two groups of air pressure sensors and the detection assembly (3) are hermetically arranged;
the first electromagnetic valve (6) is electrically connected with the first air pressure sensor (20) and the second air pressure sensor (21).
2. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 1, wherein: the circulation assembly (1) comprises a base (4);
the base (4) is of a columnar structure, a first cavity (401) is formed in the base (4), and the first electromagnetic valve (6) is arranged in the first cavity (401);
the two groups of first connecting pipes (5) are arranged above the base (4), and the central axes of the two groups of first connecting pipes (5) are vertical to the upper surface of the base (4);
one ends of the two groups of first connecting pipes (5) penetrate through the upper end of the base (4) and are located in the first cavity (401), and one ends of the two groups of first connecting pipes (5) located in the first cavity (401) are respectively communicated with the output end and the output end of the first electromagnetic valve (6).
3. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 2, wherein: an access hole (402) is formed in the side wall of the base (4);
the access hole (402) is communicated with the first cavity (401), two groups of access doors (7) are hinged in the access hole (402), the access doors (7) are symmetrically arranged and two groups of access doors (7) can be connected through a first buckle (8).
4. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 1, wherein: the heat preservation assembly (2) comprises a first shell (9), a partition plate (11) and two groups of second shells (10);
the first shell (9) and the two groups of second shells (10) are arranged to be columnar structures, and one ends of the first shell (9) and one ends of the two groups of second shells (10) are arranged to be open structures;
the first shell (9) is sleeved outside the two groups of second shells, one ends of the open structures of the first shell (9) and the two groups of second shells (10) are positioned on the same plane and have the same orientation, and the three groups of shells are not attached to each other;
baffle (11) fixed joint is between three group's casings, baffle (11) are close to the one end of three group's casing open structure openings and are located between the casing axial both ends.
5. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 4, wherein: a closed cavity formed by the partition plate (11), the first shell (9) and the two groups of second shells (10) is set as a second cavity (901), and the second cavity (901) is set as a vacuum cavity;
an open cavity formed by the partition plate (11), the first shell (9) and the two groups of second shells (10) is set as a clamping groove (1101).
6. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 5, wherein: one end surface of the first shell (9) is parallel to the upper surface of the base (4), and a third cavity (1001) and a fourth cavity (1002) are respectively arranged in the two groups of second shells (10);
two groups of fixed tubes (12) are arranged between the first shell (9) and the two groups of second shells (10), the central axis of the fixed tubes (12) is superposed with the central axis of the first connecting tube (5), and the inner diameter of the fixed tubes (12) is not less than the outer diameter of the first connecting tube (5);
two ends of the two groups of fixed pipes (12) respectively penetrate through one end of the first shell (9) and one end of the two groups of second shells (10), and the two groups of fixed pipes (12) are respectively communicated with the third cavity (1001) and the fourth cavity (1002);
the two groups of fixed pipes (12) are respectively sleeved on the two groups of first connecting pipes (5), and the joints of the fixed pipes (12) and the first connecting pipes (5) are arranged in a sealing manner.
7. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 6, wherein: a second connecting pipe (13), a third connecting pipe (14), a fourth connecting pipe (15) and a fifth connecting pipe (16) are arranged outside the first shell (9);
one ends of the second connecting pipe (13) and the fourth connecting pipe (15) sequentially penetrate through the first shell (9) and the group of second shells (10) and are communicated with the third cavity (1001);
one ends of the third connecting pipe (14) and the fifth connecting pipe (16) sequentially penetrate through the other group of second shells (10) of the first shell (9) and are communicated with the fourth cavity (1002);
the four groups of connecting pipes are hermetically arranged at the connecting part of the four groups of connecting pipes penetrating through the shell.
8. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 1, wherein: the detection assembly (3) comprises a third housing (18) and a lug (19);
the third shell (18) is arranged to be a columnar structure with the same cross section as the first shell (9), and the first shell (9) can be fixedly connected with the third shell (18) through a second buckle (17);
the bump (19) is arranged at one end of the third shell (18), the bump (19) can be clamped in the clamping groove (1101), and the joint of the bump (19) and the clamping groove (1101) is arranged in a sealing manner;
one end of the third shell (18) provided with the convex block (19) is attached to the openings of the third cavity (1001) and the fourth cavity (1002).
9. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 8, wherein: a groove (1801) is formed in one end, far away from the protruding block (19), of the third shell (18), two groups of through holes (1802) are formed in the bottom surface of the groove (1801), and the groove (1801) is communicated with the third cavity (1001) and the fourth cavity (1002) through the two groups of through holes (1802);
the first air pressure sensor (20) and the second air pressure sensor (21) are arranged in a groove (1801);
the detection end of the first air pressure sensor (20) penetrates through one group of through holes (1802) to be located inside the third cavity (1001), the detection end of the second air pressure sensor (21) penetrates through the other group of through holes (1802) to be located inside the fourth cavity (1002), and the connection positions of the detection ends of the two groups of sensors and the two groups of through holes (1802) are arranged in a sealing mode.
10. The thermal insulation device for the MRC two-stage compression hybrid refrigeration according to claim 9, wherein: one end of the third shell (18) provided with the groove (1801) is provided with a top cover (22), and the top cover (22) can be sleeved on the third shell (18).
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