CN117366973A - Cryogenic refrigerator - Google Patents

Cryogenic refrigerator Download PDF

Info

Publication number
CN117366973A
CN117366973A CN202210772176.3A CN202210772176A CN117366973A CN 117366973 A CN117366973 A CN 117366973A CN 202210772176 A CN202210772176 A CN 202210772176A CN 117366973 A CN117366973 A CN 117366973A
Authority
CN
China
Prior art keywords
temperature
compartment
cryogenic
refrigeration
stage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210772176.3A
Other languages
Chinese (zh)
Inventor
孙守军
赵向辉
孙永升
刘煜森
费斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Smart Technology R&D Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Smart Technology R&D Co Ltd
Haier Smart Home Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Smart Technology R&D Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Smart Technology R&D Co Ltd
Priority to CN202210772176.3A priority Critical patent/CN117366973A/en
Publication of CN117366973A publication Critical patent/CN117366973A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/025—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures using primary and secondary refrigeration systems
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • 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
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention belongs to the field of refrigerators, and particularly provides a cryogenic refrigerator. The cryogenic refrigerator comprises a refrigerator body, a high-temperature-level refrigerating system, a low-temperature-level refrigerating system and a controller. Wherein the box body is limited with a conventional compartment and a cryogenic compartment; the low-temperature-level refrigerating system is used for refrigerating the cryogenic compartment; the high-temperature-stage refrigeration system is used for refrigerating the conventional compartment and the low-temperature-stage refrigeration system. And the controller is configured to control the high-temperature-level refrigerating system to refrigerate the low-temperature-level refrigerating system when the cryogenic refrigerator detects that the cryogenic compartments need to be refrigerated, so that the cryogenic refrigerator can refrigerate the cryogenic compartments preferentially when the cryogenic refrigerator simultaneously needs to refrigerate a plurality of compartments.

Description

Cryogenic refrigerator
Technical Field
The invention belongs to the field of refrigerators, and particularly provides a cryogenic refrigerator.
Background
In order to achieve the low temperature refrigeration effect, some refrigerators are equipped with cascade refrigeration systems. Some cascade refrigeration systems include a high temperature stage refrigeration system including a high temperature stage compressor, a high temperature stage condenser, a high temperature stage pressure reducing member, and a high temperature stage evaporator, and a low temperature stage refrigeration system including a low temperature stage compressor, a low temperature stage condenser, a low temperature stage pressure reducing member, and a low temperature stage evaporator. The high-temperature-level refrigerating system is thermally connected with the low-temperature-level refrigerating system, so that the high-temperature-level refrigerating system absorbs heat of the low-temperature-level refrigerating system, and the low-temperature-level refrigerating system obtains lower refrigerating temperature, thereby realizing the low-temperature refrigerating effect of the refrigerator.
In a cryogenic refrigerator, at least one normal temperature compartment of a refrigerating compartment, a temperature changing compartment and a freezing compartment is often provided, and a cryogenic compartment is provided. The high-temperature-stage refrigeration system is used for refrigerating the refrigerating compartment, the temperature-changing compartment and the freezing compartment through the high-temperature-stage evaporator, and the low-temperature-stage refrigeration system is used for refrigerating the cryogenic compartment through the low-temperature-stage evaporator.
In the prior art, when a plurality of compartments of a cryogenic refrigerator need to be refrigerated at the same time, the plurality of compartments are often subjected to sequential refrigeration. For example, the refrigerated compartment is refrigerated for a period of time, and the cryogenic compartment is refrigerated for a period of time. Because the temperature in the cryogenic chamber is lower, the rate of cold leakage is greater than that of the refrigerating chamber, the temperature changing chamber and the freezing chamber, so that the storage effect of the cryogenic chamber on food materials is poor.
In other words, when a plurality of compartments of the cryogenic refrigerator need to be refrigerated at the same time, if the cryogenic compartments are not preferentially cooled, on one hand, the temperature rising speed of the cryogenic compartments is high, and the system efficiency is low. On the other hand, because the cryogenic compartment is low in temperature reduction speed, if the cryogenic compartment is not cooled preferentially, the refrigerating time required by the cryogenic compartment can be greatly increased when the temperature of the cryogenic compartment is increased greatly, and the overall cooling time of a plurality of compartments is further increased.
Disclosure of Invention
An object of the present invention is to solve the problem that the prior cryogenic refrigerator cannot make the cryogenic compartment refrigerate preferentially when a plurality of compartments need to refrigerate simultaneously.
It is a further object of the present invention to improve the cooling efficiency of a cryogenic refrigerator to a cryogenic compartment.
It is a further object of the present invention to improve the utilization of cold energy in a cryogenic refrigerator.
In order to achieve the above object, the present invention provides a cryogenic refrigerator comprising:
a housing defining a conventional compartment and a cryogenic compartment;
a low-temperature-level refrigeration system for refrigerating the cryogenic compartment;
a high temperature stage refrigeration system for refrigerating the conventional compartment and the low temperature stage refrigeration system;
and the controller is configured to control the high-temperature-level refrigerating system to refrigerate the low-temperature-level refrigerating system when the cryogenic refrigerator detects that the cryogenic compartment needs to refrigerate.
Optionally, the conventional compartments include a freezer compartment and a refrigerator/temperature swing compartment; the high-temperature-stage refrigeration system comprises a high-temperature-stage compressor, a high-temperature-stage condenser, a first control valve, a freezing depressurization member and a freezing evaporator, wherein the high-temperature-stage compressor, the high-temperature-stage condenser, the first control valve, the freezing depressurization member and the freezing evaporator are sequentially connected end to end, the high-temperature-stage refrigeration system further comprises a refrigeration/temperature-changing depressurization member and a refrigeration/freezing evaporator which are connected in series between the first control valve and the freezing evaporator, and the refrigeration/freezing evaporator is used for refrigerating the refrigeration/temperature-changing compartment; the cryogenic refrigerator further comprises a heat exchanger, wherein the heat exchanger comprises a condensation channel and an evaporation channel, the condensation channel is connected in series into the low-temperature-stage refrigeration system, and the evaporation channel is connected in series between the outlet of the refrigeration/freezing evaporator and the inlet of the freezing evaporator; the controller is further configured to control the first control valve to allow the refrigerant flowing therethrough to flow to the freezing and depressurizing member while the high-temperature-stage refrigeration system is refrigerating the cryogenic compartment.
Optionally, the high-temperature-stage refrigeration system further comprises a second control valve and a bypass pipeline, wherein the second control valve is connected in series between the evaporation channel and the freezing evaporator, an inlet of the bypass pipeline is connected with one outlet of the second control valve, and an outlet of the bypass pipeline is in fluid connection with an outlet of the freezing evaporator; the controller is further configured to control the second control valve to allow the refrigerant flowing therethrough to flow to the bypass line while the high-temperature-stage refrigeration system is refrigerating the sub-zero compartment.
Optionally, the controller is further configured to control the second control valve to flow the refrigerant flowing therethrough to the freezing evaporator when the cryogenic refrigerator detects that the cryogenic compartment does not require refrigeration.
Optionally, the high temperature stage refrigeration system further comprises a diverter line, an inlet of the diverter line being connected to the other outlet of the second control valve, an outlet of the diverter line being fluidly connected to the inlet of the refrigeration/freezing evaporator.
Optionally, the high temperature stage refrigeration system further comprises a third control valve having a first inlet fluidly connected to the freeze depressurization member, a second inlet fluidly connected to the refrigeration/freezing evaporator, a first outlet fluidly connected to the evaporation channel, and a second outlet fluidly connected to an outlet of the freezing evaporator; the controller is further configured to control the second control valve to flow at least a portion of the refrigerant flowing therethrough to the bypass line and to control the third control valve to communicate the first inlet with the first outlet and the second inlet with the second outlet if the cryogenic refrigerator detects that the refrigeration/temperature change compartment requires refrigeration while the high temperature stage refrigeration system is cooling the cryogenic compartment.
Optionally, the controller is further configured to control the first inlet and the second inlet to communicate with the first outlet, respectively, when the cryogenic refrigerator detects that the cryogenic compartment does not require refrigeration.
Optionally, the high temperature stage refrigeration system further comprises a first shut-off valve in series between the refrigeration/freezing evaporator and the evaporation channel and a second shut-off valve in series between the outlet of the refrigeration/freezing evaporator and the outlet of the freezing evaporator; the controller is further configured to control the first shut-off valve to close and the second shut-off valve to open if the cryogenic refrigerator detects that the refrigeration/temperature change compartment requires refrigeration while the high temperature level refrigeration system is cooling the cryogenic compartment.
Optionally, the controller is further configured to control the first shut-off valve to open and the second shut-off valve to close when the cryogenic refrigerator detects that the cryogenic compartment does not require refrigeration.
Optionally, the controller is further configured to control the fan corresponding to the freezing evaporator to stop rotating while the high-temperature-stage refrigeration system is refrigerating the cryogenic compartment.
Based on the foregoing description, it can be understood by those skilled in the art that in the foregoing technical solution of the present invention, when the cryogenic refrigerator detects that the cryogenic compartment needs to be refrigerated, the high-temperature-level refrigeration system is controlled to perform refrigeration on the low-temperature-level refrigeration system, so that the cryogenic refrigerator can perform preferential refrigeration on the cryogenic compartment when a plurality of compartments need to be refrigerated at the same time.
Further, when the high-temperature-level refrigerating system is used for refrigerating the cryogenic compartment, the second control valve is controlled to enable the refrigerant flowing through the second control valve to flow to the bypass pipeline, so that the refrigerant is prevented from flowing through the freezing evaporator, the refrigerating capacity produced by the high-temperature-level refrigerating system can be almost completely transferred to the low-temperature-level refrigerating system, and the refrigerating efficiency of the cryogenic refrigerator to the cryogenic compartment is improved.
Still further, when making high temperature level refrigerating system refrigerate the cryogenic compartment, if the cryogenic refrigerator detects that refrigeration/alternating temperature compartment needs to refrigerate, make the refrigerant that flows through it flow to the shunt line through controlling the second control valve to control the third control valve and make first import and first export intercommunication, make second import and second export intercommunication for refrigeration/alternating temperature evaporator can utilize the refrigeration capacity refrigeration that refrigerant in the high temperature level refrigerating system can't be absorbed by low temperature level refrigerating system in the present circulation, promoted the cryogenic refrigerator to the utilization ratio of cold capacity.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. It will be understood by those skilled in the art that components or portions thereof identified in different drawings by the same reference numerals are identical or similar; the drawings of the invention are not necessarily to scale relative to each other.
In the accompanying drawings:
FIG. 1 is a schematic view showing the construction of a compartment of a cabinet according to a first embodiment of the present invention;
FIG. 2 is a simplified schematic diagram of a refrigeration system according to a first embodiment of the present invention;
fig. 3 is a schematic view showing the construction of a refrigeration system according to a first embodiment of the present invention;
fig. 4 is a schematic view showing the construction of a refrigeration system according to a second embodiment of the present invention;
fig. 5 is a schematic view showing the construction of a refrigeration system according to a third embodiment of the present invention;
fig. 6 is a schematic view showing the construction of a refrigeration system according to a fourth embodiment of the present invention;
fig. 7 is an enlarged view of a portion a in fig. 6.
Detailed Description
It should be understood by those skilled in the art that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention, and the some embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive effort, based on the embodiments provided by the present invention, shall still fall within the scope of protection of the present invention.
It should be noted that, in the description of the present invention, terms such as "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships, which are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Further, it should also be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
In addition, it should be noted that, in the description of the present invention, the terms "cooling capacity" and "heating capacity" are two descriptions of the same physical state. That is, the higher the "cooling capacity" of a certain object (for example, evaporator, air, condenser, etc.), the lower the "heat" of the object, and the lower the "cooling capacity" of the object, the higher the "heat" of the object. Some object absorbs the cold and releases the heat, and the object releases the cold and absorbs the heat. A target maintains "cold" or "heat" to maintain the target at a current temperature. "refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, i.e., a target (e.g., an evaporator) absorbs heat while it is refrigerating.
In the present invention, a cryogenic refrigerator includes a cabinet, a high-temperature-stage refrigeration system, a low-temperature-stage refrigeration system, and a controller. Wherein the box body is limited with a conventional compartment and a cryogenic compartment; the low-temperature-level refrigerating system is used for refrigerating the cryogenic compartment; the high-temperature-stage refrigeration system is used for refrigerating the conventional compartment and the low-temperature-stage refrigeration system. And the controller is configured to control the high-temperature-level refrigerating system to refrigerate the low-temperature-level refrigerating system when the cryogenic refrigerator detects that the cryogenic compartments need to be refrigerated, so that the cryogenic refrigerator can refrigerate the cryogenic compartments preferentially when the cryogenic refrigerator simultaneously needs to refrigerate a plurality of compartments.
The cryogenic refrigerator of the present invention will be described in detail with reference to the accompanying drawings in combination with specific embodiments.
A cryogenic refrigerator in a first embodiment of the present invention will be first described by way of example with reference to fig. 1 to 3.
As shown in fig. 1, in a first embodiment of the present invention, a cabinet 100 includes a freezing compartment 110, a refrigerating/temperature changing compartment 120, and a cryogenic compartment 130, wherein the freezing compartment 110 and the refrigerating/temperature changing compartment 120 together constitute a conventional compartment of the cabinet 100. In addition, one skilled in the art can also define only the refrigerator compartment 110 or the refrigerating/temperature changing compartment 120 as a conventional compartment as required by the case 100.
As shown in fig. 2, in the first embodiment of the present invention, the heat exchanger 400 includes an evaporation path 410 and a condensation path 420, the evaporation path 410 is connected in series into the high-temperature stage refrigeration system 200, and the condensation path 420 is connected in series into the low-temperature stage refrigeration system 300. Further, the refrigerant in the evaporation channel 410 and the refrigerant in the condensation channel 420 are thermally connected, so that the two parts of the refrigerant can exchange heat, and the high-temperature-stage refrigeration system 200 can refrigerate the low-temperature-stage refrigeration system 300 through the heat exchanger 400.
As shown in fig. 3, in the first embodiment of the present invention, the high temperature stage refrigeration system 200 includes a high temperature stage compressor 201, a high temperature stage condenser 202, an optional high temperature stage dew prevention pipe 203, an optional high temperature stage dry filter 204, a first control valve 205, a freeze depressurization member 206, a freeze evaporator 207, an optional high temperature stage liquid storage bag 208, and an optional high temperature stage air return pipe 209, which are sequentially connected end to end, so that the refrigerant in the high temperature stage refrigeration system 200 can circulate along the following paths: high temperature level compressor 201- & gthigh temperature level condenser 202- & gthigh temperature level dew prevention pipe 203- & gthigh temperature level dry filter 204- & gtfirst control valve 205- & gtfreezing depressurization member 206- & gtfreezing evaporator 207- & gthigh temperature level liquid storage bag 208- & gthigh temperature level air return pipe 209- & gthigh temperature level compressor 201.
As shown in fig. 3, in the first embodiment of the present invention, the evaporation channel 410 is connected in series between the freezing depression member 206 and the freezing evaporator 207.
In other embodiments of the present invention, the evaporating channels 410 may be connected in series between the freeze evaporator 207 and the high temperature grade reservoir 208 as desired by one skilled in the art.
With continued reference to fig. 3, the high temperature stage refrigeration system 200 further includes a refrigeration/temperature and pressure swing member 210 and a refrigeration/temperature and pressure swing evaporator 211 in series between the first control valve 205 and the evaporation channel 410 to enable the refrigerant within the high temperature stage refrigeration system 200 to circulate along the following paths: high temperature stage compressor 201- & gthigh temperature stage condenser 202- & gthigh temperature stage dew prevention pipe 203- & gthigh temperature stage dry filter 204- & gtfirst control valve 205- & gtrefrigeration/temperature and pressure reducing member 210- & gtrefrigeration/temperature and pressure reducing evaporator 211- & gtevaporation channel 410- & gtrefrigeration evaporator 207- & gthigh temperature stage liquid storage bag 208- & gthigh temperature stage return pipe 209- & gthigh temperature stage compressor 201.
With continued reference to fig. 3, the high temperature stage refrigeration system 200 further includes an auxiliary depressurization member 212 and an auxiliary evaporator 213 in series between the first control valve 205 and the evaporation channel 410 to enable the refrigerant within the high temperature stage refrigeration system 200 to circulate along the following paths: high temperature stage compressor 201- & gthigh temperature stage condenser 202- & gthigh temperature stage dew prevention pipe 203- & gthigh temperature stage dry filter 204- & gtfirst control valve 205- & gtauxiliary depressurization member 212- & gtauxiliary evaporator 213- & gtevaporation channel 410- & gtfreeze evaporator 207- & gthigh temperature stage liquid storage bag 208- & gthigh temperature stage return air pipe 209- & gthigh temperature stage compressor 201.
Preferably, the first control valve 205 is a three-in three-out reversing valve to control the flow of refrigerant therethrough to at least one of the freezing and pressure reducing member 206, the refrigeration/temperature and pressure reducing member 210, and the auxiliary pressure reducing member 212 by the first control valve 205. Alternatively, one skilled in the art may replace the first control valve 205 with three shut-off valves in parallel as desired.
Further, the freezing and pressure reducing members 206, the refrigeration/temperature and pressure reducing members 210 and the auxiliary pressure reducing member 212 are all capillary tubes, and further, it will be understood by those skilled in the art that at least one of the freezing and pressure reducing members 206, the refrigeration/temperature and pressure reducing members 210 and the auxiliary pressure reducing member 212 is provided as any other viable pressure reducing member, such as an electronic expansion valve.
Still further, the freezing evaporator 207 is used to cool the freezing compartment 110, the refrigerating/temperature changing evaporator 211 is used to cool the refrigerating/temperature changing compartment 120, and the auxiliary evaporator 213 is used to assist the cryogenic stage refrigeration system in cooling the cryogenic compartment 130. The freezing evaporator 207, the refrigerating/temperature-changing evaporator 211 and the auxiliary evaporator 213 are respectively provided with fans to deliver cool air around each evaporator into the corresponding compartment by the fans.
With continued reference to fig. 3, in a first embodiment of the invention, the cryogenic refrigeration system 300 includes a cryogenic compressor 301, an optional cryogenic condenser 302, an optional heat exchange tube 303, an optional cryogenic filter drier 304, a cryogenic depressurization member 305, a cryogenic evaporator 306, an optional cryogenic liquid package 307, an optional cryogenic first air return pipe 308, and an optional cryogenic second air return pipe 309, in end-to-end relationship, in order to enable the refrigerant within the cryogenic refrigeration system 300 to circulate along the following path: low temperature stage compressor 301→low temperature stage condenser 302→heat exchange tube 303→low temperature stage dry filter 304→low temperature stage depressurization member 305→low temperature stage evaporator 306→low temperature stage liquid storage package 307→low temperature stage first muffler 308→low temperature stage second muffler 309→low temperature stage compressor 301.
The low-temperature-stage pressure reducing member 305 is a capillary tube, and the low-temperature-stage evaporator 306 is used for refrigerating the cryogenic compartment 130. The low-temperature-stage first air return pipe 308 is thermally connected with the low-temperature-stage pressure reducing member 305, and the low-temperature-stage second air return pipe 309 is thermally connected with the heat exchange pipe 303, so as to improve the supercooling degree of the refrigerant when entering the low-temperature-stage evaporator 306.
As can be seen in fig. 3, the condensing channels 420 are connected in series between the heat exchange tubes 303 and the low temperature stage drier-filter 304. In addition, one skilled in the art can also place the condensing channels 420 in series at any other feasible location within the cryogenic refrigeration system 300 as desired.
Further, although not shown in the drawings, in the first embodiment of the present invention, the cryogenic refrigerator further includes a controller. The controller is configured to: when the cryogenic refrigerator detects that the cryogenic compartment 130 needs to be cooled, the high-temperature-stage refrigeration system 200 is controlled to cool the low-temperature-stage refrigeration system 300. Specifically, the controller is configured to control the first control valve 205 so that the refrigerant flowing therethrough flows only to the freezing and depressurizing means 206 while the high-temperature-stage refrigeration system 200 is refrigerating the sub-zero compartment 130; and stops the rotation of the blower corresponding to the freezing evaporator 207. Further, the fan corresponding to the refrigerating/temperature-changing evaporator 211 is stopped.
Wherein detecting whether the cryogenic compartment 130 requires refrigeration comprises: the temperature in the cryogenic compartment 130 is detected by the temperature sensor, and when the temperature in the cryogenic compartment 130 is detected to exceed a preset temperature interval, it is determined that the cryogenic compartment 130 needs to be cooled. The preset temperature interval may be any feasible temperature interval, such as-80 ℃ to-65 ℃, 60 ℃ to-40 ℃, 65 ℃ to-45 ℃, 55 ℃ to-40 ℃, etc.
Based on the foregoing description, it will be understood by those skilled in the art that in the first embodiment of the present invention, when the cryogenic refrigerator detects that the cryogenic compartment 130 needs to be cooled, the first control valve 205 is controlled to enable the refrigerant flowing therethrough to flow only to the freezing and depressurizing means 206; and the fan corresponding to the freezing evaporator 207 stops rotating, so that the cryogenic refrigerator can preferentially refrigerate the cryogenic compartment 130 when a plurality of compartments need to refrigerate at the same time.
A refrigeration system according to a second embodiment of the present invention will be described in detail with reference to fig. 4.
It should be noted that, for convenience of description and for enabling those skilled in the art to quickly understand the technical solution of the present invention, only the differences between the second embodiment and the refrigeration system in the first embodiment will be described in detail.
As shown in fig. 4, in the second embodiment of the present invention, the high temperature stage refrigeration system 200 further includes a second control valve 214 and a bypass line 215, the second control valve 214 being connected in series between the evaporation channel 410 and the freezing evaporator 207, an inlet of the bypass line 215 being connected to one outlet of the second control valve 214, an outlet of the bypass line 215 being fluidly connected to an outlet of the freezing evaporator 207.
Optionally, the second control valve 214 is a two-in/two-out reversing valve, so that the refrigerant flowing through the second control valve 214 is controlled to flow to the freezing evaporator 207 or the bypass line 215. Alternatively, one skilled in the art can replace the second control valve 214 with two shut-off valves in parallel as desired.
Further, the controller is further configured to control the second control valve 214 so that the refrigerant flowing through the second control valve flows to the bypass line 215 without flowing through the refrigeration evaporator 207, while the high-temperature-stage refrigeration system 200 is configured to cool the sub-zero compartment 130.
Still further, the controller is further configured to control the second control valve 214 such that the refrigerant flowing therethrough flows to the freezing evaporator 207 without flowing through the bypass line 215 when the sub-ambient temperature sensor detects that the sub-ambient temperature sensor 130 does not need to be cooled.
Based on the foregoing description, it can be understood by those skilled in the art that in the second embodiment of the present invention, the high-temperature-stage refrigeration system 200 is used for refrigerating the cryogenic compartment 130, and simultaneously, the refrigerant does not flow through the refrigeration evaporator 207, so that the cooling capacity of the high-temperature-stage refrigeration system 200 can be almost completely transferred to the low-temperature-stage refrigeration system 300, thereby improving the refrigerating efficiency of the cryogenic refrigerator for the cryogenic compartment 130.
A refrigeration system according to a third embodiment of the present invention will be described in detail with reference to fig. 5.
It should be noted that, for convenience of description and for enabling those skilled in the art to quickly understand the technical solution of the present invention, only the differences between the refrigeration system of the third embodiment and the refrigeration system of the second embodiment will be described in detail.
In a third embodiment of the present invention, as shown in fig. 5, the high temperature stage refrigeration system 200 further includes a bypass line 216, an inlet of the bypass line 216 being connected to another outlet of the second control valve 214, and an outlet of the bypass line 216 being fluidly connected to an inlet of the refrigeration/freezing evaporator 211.
Optionally, the second control valve 214 is a one-in three-out reversing valve, so that the refrigerant flowing through the second control valve 214 is controlled to flow to the freezing evaporator 207, the bypass line 215 or the refrigerating/temperature-changing evaporator 211. Alternatively, one skilled in the art can replace the second control valve 214 with three shut-off valves in parallel as desired.
With continued reference to fig. 5, in a third embodiment of the present invention, the high temperature stage refrigeration system 200 further includes a first shut-off valve 217 connected in series between the refrigeration/freezing evaporator 211 and the evaporation channel 410 and a second shut-off valve 218 connected in series between the outlet of the refrigeration/freezing evaporator 211 and the outlet of the freezing evaporator 207.
Further, the controller is also configured to control the first shut-off valve 217 to close and the second shut-off valve 218 to open if the cryogenic refrigerator detects that the refrigeration/temperature swing compartment 120 needs to be cooled while the high temperature stage refrigeration system 200 is cooling the cryogenic compartment 130.
Still further, the controller is further configured to control the first shut-off valve 217 to open and the second shut-off valve 218 to close when the cryogenic refrigerator detects that the cryogenic compartment 130 does not require refrigeration.
Based on the foregoing description, it can be understood by those skilled in the art that in the third embodiment of the present invention, the high temperature stage refrigeration system 200 is made to cool the sub-cooling compartment 130, and the first stop valve 217 is controlled to be closed and the second stop valve 218 is controlled to be opened, so that the refrigeration/temperature-varying evaporator 211 can utilize the cold energy of the refrigerant in the high temperature stage refrigeration system 200, which cannot be absorbed by the low temperature stage refrigeration system 300 in the current cycle, to cool, thereby improving the utilization rate of the cold energy by the sub-cooling compartment.
A refrigeration system according to a fourth embodiment of the present invention will be described in detail with reference to fig. 6 and 7.
It should be noted that, for convenience of description and for enabling those skilled in the art to quickly understand the technical solution of the present invention, only the differences between the refrigeration system of the fourth embodiment and the refrigeration system of the third embodiment will be described in detail.
As shown in fig. 6, in the fourth embodiment of the present invention, the first stop valve 217 and the second stop valve 218 in the third embodiment are replaced with a third control valve 219.
As shown in fig. 7, the third control valve 219 has a first inlet 2191, a first outlet 2192, a second inlet 2193, and a second outlet 2194, the first inlet 2191 is fluidly connected to the freezing and depressurizing member 206, the first outlet 2192 is fluidly connected to the evaporation channel 410, the second inlet 2193 is fluidly connected to the refrigeration/freezing evaporator 211, and the second outlet 2194 is fluidly connected to the outlet of the freezing evaporator 207.
Further, the controller is further configured to control the second control valve 214 to flow at least a portion of the refrigerant flowing therethrough to the bypass line 215 and to control the third control valve 219 to communicate the first inlet 2191 with the first outlet 2192 and the second inlet 2193 with the second outlet 2193 if the cryogenic refrigerator detects that the refrigeration/temperature swing compartment 120 requires refrigeration while the high temperature stage refrigeration system 200 is cooling the cryogenic compartment 130.
Still further, the controller is further configured to control the first and second inlets 2191, 2193 to communicate with the first outlet 2192, respectively, when the cryogenic refrigerator detects that refrigeration of the cryogenic compartment 130 is not required.
The manner of detecting whether the refrigerating/temperature-changing compartment 120 needs to be refrigerated is the same as that of detecting whether the cryogenic compartment 130 needs to be refrigerated in the first embodiment, and will not be described here again.
Based on the foregoing, it will be appreciated by those skilled in the art that in the fourth embodiment of the present invention, while the high-temperature-stage refrigeration system 200 is refrigerating the sub-cooling compartment 130, if the sub-cooling compartment 120 detects that the sub-cooling compartment needs to be refrigerated, the second control valve 214 is controlled to enable the refrigerant flowing through the sub-cooling compartment to flow to the split line 215, and the third control valve 219 is controlled to enable the first inlet 2191 to communicate with the first outlet 2192 and the second inlet 2193 to communicate with the second outlet 2194, so that the refrigerating/temperature-varying evaporator 211 can utilize the cold energy of the high-temperature-stage refrigeration system 200, which the refrigerant cannot be absorbed by the low-temperature-stage refrigeration system 300 in the current cycle, thereby improving the utilization rate of the cold energy by the sub-cooling compartment.
Thus far, the technical solution of the present invention has been described in connection with the foregoing embodiments, but it will be readily understood by those skilled in the art that the scope of the present invention is not limited to only these specific embodiments. The technical solutions in the above embodiments can be split and combined by those skilled in the art without departing from the technical principles of the present invention, and equivalent changes or substitutions can be made to related technical features, so any changes, equivalent substitutions, improvements, etc. made within the technical principles and/or technical concepts of the present invention will fall within the protection scope of the present invention.

Claims (10)

1. A cryogenic refrigerator comprising:
a housing defining a conventional compartment and a cryogenic compartment;
a low-temperature-level refrigeration system for refrigerating the cryogenic compartment;
a high temperature stage refrigeration system for refrigerating the conventional compartment and the low temperature stage refrigeration system;
and the controller is configured to control the high-temperature-level refrigerating system to refrigerate the low-temperature-level refrigerating system when the cryogenic refrigerator detects that the cryogenic compartment needs to refrigerate.
2. The cryogenic refrigerator of claim 1, wherein,
the conventional compartments include a freezing compartment and a refrigerating/temperature changing compartment;
the high-temperature-stage refrigeration system comprises a high-temperature-stage compressor, a high-temperature-stage condenser, a first control valve, a freezing depressurization member and a freezing evaporator, wherein the high-temperature-stage compressor, the high-temperature-stage condenser, the first control valve, the freezing depressurization member and the freezing evaporator are sequentially connected end to end, the high-temperature-stage refrigeration system further comprises a refrigeration/temperature-changing depressurization member and a refrigeration/freezing evaporator which are connected in series between the first control valve and the freezing evaporator, and the refrigeration/freezing evaporator is used for refrigerating the refrigeration/temperature-changing compartment;
the cryogenic refrigerator further comprises a heat exchanger, wherein the heat exchanger comprises a condensation channel and an evaporation channel, the condensation channel is connected in series into the low-temperature-stage refrigeration system, and the evaporation channel is connected in series between the outlet of the refrigeration/freezing evaporator and the inlet of the freezing evaporator;
the controller is further configured to control the first control valve to allow the refrigerant flowing therethrough to flow to the freezing and depressurizing member while the high-temperature-stage refrigeration system is refrigerating the cryogenic compartment.
3. The cryogenic refrigerator of claim 2, wherein,
the high-temperature-stage refrigeration system further comprises a second control valve and a bypass pipeline, wherein the second control valve is connected in series between the evaporation channel and the freezing evaporator, the inlet of the bypass pipeline is connected with one outlet of the second control valve, and the outlet of the bypass pipeline is in fluid connection with the outlet of the freezing evaporator;
the controller is further configured to control the second control valve to allow the refrigerant flowing therethrough to flow to the bypass line while the high-temperature-stage refrigeration system is refrigerating the sub-zero compartment.
4. The cryogenic refrigerator of claim 3, wherein,
the controller is further configured to control the second control valve to flow the refrigerant flowing therethrough to the freezing evaporator when the cryogenic refrigerator detects that the cryogenic compartment does not require refrigeration.
5. The cryogenic refrigerator of claim 3, wherein,
the high-temperature-stage refrigeration system further comprises a diversion pipeline, wherein an inlet of the diversion pipeline is connected with the other outlet of the second control valve, and an outlet of the diversion pipeline is in fluid connection with an inlet of the refrigeration/freezing evaporator.
6. The cryogenic refrigerator of claim 5, wherein,
the high temperature stage refrigeration system further includes a third control valve having a first inlet fluidly connected to the freeze depressurization member, a second inlet fluidly connected to the refrigeration/freezing evaporator, a first outlet fluidly connected to the evaporation channel, and a second outlet fluidly connected to an outlet of the freezing evaporator;
the controller is further configured to control the second control valve to flow at least a portion of the refrigerant flowing therethrough to the bypass line and to control the third control valve to communicate the first inlet with the first outlet and the second inlet with the second outlet if the cryogenic refrigerator detects that the refrigeration/temperature change compartment requires refrigeration while the high temperature stage refrigeration system is cooling the cryogenic compartment.
7. The cryogenic refrigerator of claim 6, wherein,
the controller is further configured to control the first inlet and the second inlet to communicate with the first outlet, respectively, when the cryogenic refrigerator detects that the cryogenic compartment does not require refrigeration.
8. The cryogenic refrigerator of claim 5, wherein,
the high temperature stage refrigeration system further includes a first shut-off valve in series between the refrigeration/freezing evaporator and the evaporation channel and a second shut-off valve in series between the outlet of the refrigeration/freezing evaporator and the outlet of the freezing evaporator;
the controller is further configured to control the first shut-off valve to close and the second shut-off valve to open if the cryogenic refrigerator detects that the refrigeration/temperature change compartment requires refrigeration while the high temperature level refrigeration system is cooling the cryogenic compartment.
9. The cryogenic refrigerator of claim 8, wherein,
the controller is further configured to control the first shut-off valve to open and the second shut-off valve to close when the cryogenic refrigerator detects that the cryogenic compartment does not require refrigeration.
10. The cryogenic refrigerator of any one of claims 2 to 9, wherein,
the controller is further configured to control a fan corresponding to the freezing evaporator to stop rotating while the high-temperature-stage refrigeration system is caused to refrigerate the cryogenic compartment.
CN202210772176.3A 2022-06-30 2022-06-30 Cryogenic refrigerator Pending CN117366973A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210772176.3A CN117366973A (en) 2022-06-30 2022-06-30 Cryogenic refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210772176.3A CN117366973A (en) 2022-06-30 2022-06-30 Cryogenic refrigerator

Publications (1)

Publication Number Publication Date
CN117366973A true CN117366973A (en) 2024-01-09

Family

ID=89397111

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210772176.3A Pending CN117366973A (en) 2022-06-30 2022-06-30 Cryogenic refrigerator

Country Status (1)

Country Link
CN (1) CN117366973A (en)

Similar Documents

Publication Publication Date Title
KR101638675B1 (en) Combined binary refrigeration cycle apparatus
CN104011485A (en) Air-Conditioning Unit
WO2014068967A1 (en) Refrigeration device
WO2011045976A1 (en) Air-conditioning hot-water supply system
KR102370565B1 (en) A refrigerator
US10288335B2 (en) Refrigerator having a refrigeration system with first and second conduit paths
CN101014818A (en) Refrigerating device
JP6653443B2 (en) Outdoor unit of air conditioner
JP2006098044A (en) Refrigeration device
CN217275069U (en) Refrigeration device
JP5157307B2 (en) vending machine
JP2007100987A (en) Refrigerating system
CN117366973A (en) Cryogenic refrigerator
JP2009293887A (en) Refrigerating device
CN116697645A (en) Refrigerating system and refrigerating equipment
JP6846599B2 (en) refrigerator
JP2009115336A (en) Refrigeration system
JP2006029738A (en) Heat storage type air conditioner
CN219713696U (en) Cascade refrigerating system and refrigerating equipment
CN217465080U (en) Refrigeration device with cascade refrigeration system
CN218096773U (en) Refrigerator with multiple temperature zones
CN117404862A (en) Cryogenic refrigerator
CN218096770U (en) Refrigerator with deep cooling function
CN219390195U (en) Refrigerating apparatus
CN218096666U (en) Cascade refrigerating system for refrigerating equipment and refrigerating equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication