CN116294364A - Refrigerating device of direct-cooling refrigerator and control method - Google Patents
Refrigerating device of direct-cooling refrigerator and control method Download PDFInfo
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- CN116294364A CN116294364A CN202310205712.6A CN202310205712A CN116294364A CN 116294364 A CN116294364 A CN 116294364A CN 202310205712 A CN202310205712 A CN 202310205712A CN 116294364 A CN116294364 A CN 116294364A
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- 238000001816 cooling Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000004065 semiconductor Substances 0.000 claims abstract description 70
- 238000007710 freezing Methods 0.000 claims abstract description 67
- 230000008014 freezing Effects 0.000 claims abstract description 67
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 238000010257 thawing Methods 0.000 claims abstract description 11
- 238000005057 refrigeration Methods 0.000 claims description 84
- 230000017525 heat dissipation Effects 0.000 claims description 25
- 238000009833 condensation Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000001704 evaporation Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- 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
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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
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
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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
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
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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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable devices
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2500/00—Problems to be solved
- F25D2500/04—Calculation of parameters
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The utility model discloses a refrigerating device of a direct-cooling refrigerator and a control method thereof, wherein the refrigerating device comprises a refrigerating chamber, a freezing chamber, a compression refrigerating mechanism and a semiconductor refrigerating mechanism, wherein the semiconductor refrigerating mechanism comprises a semiconductor refrigerating sheet, one side of the semiconductor refrigerating sheet faces to a refrigerating evaporator, and a first radiating mechanism is arranged on the side of the semiconductor refrigerating sheet; a second radiating mechanism is arranged on one side of the semiconductor refrigerating sheet, which is far away from the first radiating mechanism; two sides of the semiconductor refrigerating sheet are respectively connected with the switching devices to form an H-bridge circuit; the control mechanism comprises a control board, an annular temperature sensor, a refrigerating defrosting sensor, a refrigerating sensor and a freezing sensor; the refrigerating device can solve the problems that the temperature of a refrigerating chamber is low and the freezing is high under the condition of low ambient temperature or increased freezing heat load of the refrigerator, the temperature of the refrigerating chamber is too low and the temperature of the refrigerating chamber is high and the compressor is not stopped for a long time under the condition of high ambient temperature or increased freezing heat load of the refrigerator.
Description
Technical Field
The utility model relates to the technical field of refrigeration devices, in particular to a direct-cooling refrigerator refrigeration device and a control method.
Background
The refrigerating system of the two-temperature-zone direct-cooling refrigerator is generally a compression type single-cycle refrigerating system and a compression type double-cycle refrigerating system, and the double-cycle refrigerating system is switched by valves to realize independent temperature control of refrigeration and freezing.
The single-cycle refrigeration system comprises the following cycles: the low-temperature low-pressure refrigerant is compressed into high-temperature high-pressure gas in the compressor, discharged from the outlet of the compressor, condensed and cooled by the condenser, throttled and depressurized by a single capillary tube, evaporated and absorbed into low-temperature low-pressure gas by the freezing evaporator and the refrigerating evaporator, and finally returned to the compressor to form a complete compression refrigeration cycle. The single-cycle direct-cooling refrigerator is generally matched with the sizes of refrigerating and freezing evaporators at specific environmental temperature in design, and proper refrigerants are adjusted to meet the test requirements of national standard GB8059 on power consumption and storage temperature.
However, in practice, the use conditions of the user are complex, the external environment temperature changes, the number of times of opening the refrigerating and freezing chamber by the user in different periods changes, and the load of the loading compartment changes, which affects the heat loads of the refrigerating and freezing chambers of the refrigerator, so that the refrigerating demand proportion of the refrigerating and freezing chamber also changes. The single-cycle direct-cooling refrigerator has the defects that when the temperature is lower than a specific environment temperature or the freezing load is large, the temperature of the refrigerating chamber is lower than the temperature of the refrigerating chamber in order to ensure that the proper temperature of the refrigerating chamber is achieved, the temperature of the refrigerating chamber is over zero, and the freezing chamber is frozen, when the temperature of the refrigerating chamber is higher than the temperature of the refrigerating chamber or the freezing load is large, the temperature of the refrigerating chamber is over low in order to ensure the refrigerating, refrigerating and preserving effects, the compressor is not stopped for a long time, so that energy is wasted, and the user experience effect is influenced.
In order to solve the above problems, patent CN 206001777U discloses a refrigerator, in which a fan is added in a refrigerating chamber, a refrigerating air duct is provided, the refrigerator is controlled to be connected with the fan in series through a ring temperature magnetic control switch, the start and stop of the fan are automatically adjusted according to the ring temperature, and the distribution of refrigerating and freezing temperatures is adjusted. The above-mentioned mode can alleviate the cold-stored refrigeration temperature distribution problem under high low ring temperature to a certain extent, but to the cold-stored refrigeration load change that the user uses and lead to, can't the cold volume distribution of dynamic regulation cold-stored refrigeration.
The patent CN 104654646B discloses a refrigeration control method of a reversible direct-cooling system, which is characterized in that a four-way reversing valve is added at the front end of a throttling device (capillary tube) at the rear end of an evaporator, the four-way reversing valve is switched according to different ring temperatures, the flow direction of a refrigerant between a refrigeration evaporator and a freezing evaporator is regulated, and the problem of area matching of the evaporator of the refrigerator under different environment temperatures is solved. The mode can well solve the cold energy requirements of refrigeration and freezing under different loads, but a throttling capillary tube and a four-way reversing valve are needed to be added, the welding points of the pipelines of the refrigerating system are increased more, the valve is likely to leak, the leakage risk of the whole refrigerating system is greatly increased, and the refrigerating reliability of the product is affected.
Disclosure of Invention
The utility model aims to provide a direct-cooling refrigerator refrigerating device and a control method, which solve the following technical problems:
the existing single-cycle direct-cooling refrigerator has the defects that the temperature of a refrigerating chamber is low and the freezing temperature is high under the condition of low ambient temperature or increased freezing heat load, the temperature of the refrigerating chamber is too low and the temperature of the refrigerating chamber is high under the condition of high ambient temperature or increased freezing heat load, and a compressor is not stopped for a long time.
The aim of the utility model can be achieved by the following technical scheme:
a refrigerating device of a direct-cooling refrigerator comprises a refrigerating chamber and a freezing chamber, and also comprises
The compression refrigeration system comprises a compressor, an anti-condensation pipe is connected in series behind the compressor, a condenser is connected in series behind the anti-condensation pipe, a filter is connected in series behind the condenser, a capillary is connected in series behind the filter, a freezing evaporator arranged in the freezing chamber is connected in series behind the capillary, a refrigerating evaporator arranged in the refrigerating chamber is connected in series behind the freezing evaporator, and the refrigerating evaporator is connected with the compressor to form a circulation system;
the semiconductor refrigeration mechanism comprises a semiconductor refrigeration sheet, one side of the semiconductor refrigeration sheet faces the refrigeration evaporator, and the side of the semiconductor refrigeration sheet is provided with a first heat dissipation mechanism; a second heat dissipation mechanism is arranged on one side, away from the first heat dissipation mechanism, of the semiconductor refrigerating sheet; two sides of the semiconductor refrigerating sheet are respectively connected with the switching devices to form an H-bridge circuit;
the control mechanism comprises a control board arranged on the box body, an ambient temperature sensor arranged outside the box body and used for detecting the temperature of the external environment of the refrigerator, a refrigerated defrosting sensor arranged on the refrigerated evaporator and used for detecting the temperature of the refrigerated evaporator, a refrigerated sensor arranged inside the refrigerated chamber and used for detecting the temperature inside the refrigerated chamber, and a freezing sensor arranged inside the freezing chamber and used for detecting the temperature inside the freezing chamber; the ring temperature sensor, the refrigerating defrosting sensor, the refrigerating sensor and the freezing sensor are all electrically connected with the control board.
In still further embodiments: the first heat dissipation mechanism comprises a first heat radiator and a first heat dissipation fan, the first heat radiator is arranged on one side of the semiconductor refrigerating sheet, which faces the refrigeration evaporator, and the first heat dissipation fan is arranged on the first heat radiator; the second heat dissipation mechanism comprises a second radiator and a second heat dissipation fan, the second radiator is arranged on one side, far away from the refrigeration evaporator, of the semiconductor refrigerating sheet, and the second heat dissipation fan is arranged on the second radiator.
In still further embodiments: the first cooling fan, the second cooling fan and the semiconductor refrigerating sheet are electrically connected with the control board.
In still further embodiments: the first radiator and the second radiator are both installed on the semiconductor refrigerating sheet through screws, and are in contact heat conduction with the heat conduction block through heat conduction glue.
In still further embodiments: the side end of the first radiator is provided with a heat insulation channel, and the heat insulation channel is made of heat insulation materials.
In still further embodiments: the switching device is a MOS tube or a relay.
The control method of the direct-cooling refrigerator refrigerating device is characterized by comprising the following steps:
s1, powering on a refrigerator, and reading the temperature TH of a ring temperature sensor, the temperature TZ of a refrigerating defrosting sensor, the temperature TC of the refrigerating sensor and the temperature TD of a freezing sensor through a control board;
s2, comparing TC with TCon (set refrigeration starting point temperature), TD with TDon (set refrigeration starting point temperature), if TC is more than or equal to TCon and TD is more than or equal to TDon, turning to S3, if TC is more than or equal to TCon and TD is less than TDon, turning to S4, and if TC is less than TCon and TD is more than or equal to TDon, turning to S6;
s3, judging TH, and turning to S4 if TH is more than or equal to 32 ℃; if not, turning to S5;
s4: the compressor operates, the semiconductor refrigeration mechanism starts to operate, and the forward circuit is connected;
s5, judging TH, and turning to S6 if TH is less than or equal to 16 ℃; if not, turning to S7;
s6: the compressor operates, the semiconductor refrigeration mechanism starts to operate, and a negative circuit is connected;
s7, judging that TH, if TH is more than 16 ℃ and less than 32 ℃, the compressor is operated, and the semiconductor refrigeration mechanism is not operated;
s8, judging that TC is less than or equal to TCoff (set refrigeration shutdown point temperature) and TD is less than or equal to TDoff (set refrigeration shutdown point temperature), stopping the compressor, and stopping the operation of the semiconductor refrigeration mechanism;
s9, accumulating the running time N of the compressor, judging whether the running time N is more than or equal to 48 hours, namely judging whether TZ is less than 3 ℃, if yes, turning to the S refrigerating sensor, and if not, turning to the S freezing sensor;
s10, starting the semiconductor refrigeration mechanism to operate, and switching on a forward circuit;
s11, stopping the operation of the semiconductor refrigeration mechanism.
The utility model has the beneficial effects that:
(1) According to the utility model, by adding the semiconductor refrigeration mechanism near the refrigerating chamber evaporator, combining with the fact that the two chambers of the direct-cooling single-cycle system have great fluctuation in refrigerating and freezing load proportion under different use conditions of users, fully utilizing the characteristics that the cold and hot sides of the semiconductor refrigeration sheets in the semiconductor refrigeration mechanism can be switched, changing the evaporating temperature of the direct-cooling compression refrigeration mechanism, indirectly controlling and changing the evaporating temperature of the system and the heat exchange temperature difference of the refrigerating chamber, and the evaporating temperature and the heat exchange temperature difference of the freezing chamber, the utility model meets the requirements of different cold quantities of the refrigerating chamber, so that the temperature of the refrigerating chamber is lower under low environmental temperature or the increasing of freezing and heating load of the refrigerator, the temperature of the refrigerating chamber is too low under high environmental temperature or the increasing of the refrigerating and heating load, the refrigerating chamber is higher, and the compressor is not stopped for a long time; the energy-saving and fresh-keeping effects can be achieved by more fitting the requirements of users;
(2) According to the utility model, a welding point or a valve of a refrigerating system pipeline is not required to be added in the compression refrigerating mechanism, so that the leakage risk of the refrigerating system is reduced, and the safety and reliability of products are improved.
Drawings
The utility model is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a compression refrigeration system in accordance with one embodiment of the present utility model;
FIG. 3 is a schematic diagram of a semiconductor refrigeration mechanism in accordance with one embodiment of the present utility model;
FIG. 4 is a schematic diagram of the switching control of a semiconductor refrigeration mechanism in one embodiment of the utility model;
fig. 5 is a flowchart of a control method of a refrigeration apparatus according to an embodiment of the present utility model.
The reference numerals in the figures represent:
1. a refrigerating chamber; 2. a freezing chamber; 3. a compressor; 4. a freezing evaporator; 5. a refrigerated evaporator; 6. a semiconductor refrigeration mechanism; 61. a first heat sink; 62. a first heat radiation fan; 63. a second heat sink; 64. a second heat radiation fan; 65. a semiconductor refrigeration sheet; 66. a heat preservation channel; 7. a control board; 8. a ring temperature sensor; 9. a refrigerated defrosting sensor; 10. a refrigerated sensor; 11. freezing sensor.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-4, the utility model discloses a refrigerating device of a direct-cooling refrigerator, which comprises a refrigerating chamber 1 and a freezing chamber 2, wherein the refrigerating chamber 1 is arranged above the freezing chamber 2; the refrigerating system comprises a compressor 3, an anti-condensation pipe is connected in series behind the compressor 3, a condenser is connected in series behind the anti-condensation pipe, a filter is connected in series behind the condenser, a capillary is connected in series behind the filter, a freezing evaporator 4 arranged in the freezing chamber 2 is connected in series behind the capillary, a refrigerating evaporator 5 arranged in the refrigerating chamber 1 is connected in series behind the freezing evaporator 4, and the refrigerating evaporator 5 is connected with the compressor 3 to form a circulating system.
The inside of the refrigerating chamber 1 is provided with a semiconductor refrigerating mechanism 6, the semiconductor refrigerating mechanism 6 comprises a semiconductor refrigerating sheet 65, one side of the semiconductor refrigerating sheet 65 faces the refrigerating evaporator 5, and the side is provided with a first heat dissipation mechanism; a second heat dissipation mechanism is arranged on one side of the semiconductor refrigerating plate 65 away from the first heat dissipation mechanism; two sides of the semiconductor refrigerating sheet 65 are respectively connected with a switching device to form an H-bridge circuit; the type of the switching device is not particularly limited, and the switching device only needs to meet the actual application requirements, for example, in the embodiment of the utility model, the switching device is a MOS tube or a relay.
The refrigerating device also comprises a control mechanism, wherein the control mechanism comprises a control board 7 arranged on the box body, an annular temperature sensor 8 arranged outside the box body and used for detecting the external environment temperature of the refrigerator, a refrigerated defrosting sensor 9 arranged on the refrigerated evaporator 5 and used for detecting the temperature of the refrigerated evaporator 5, a refrigerated sensor 10 arranged inside the refrigerated chamber 1 and used for detecting the internal temperature of the refrigerated chamber 1, and a freezing sensor 11 arranged inside the freezing chamber 2 and used for detecting the internal temperature of the freezing chamber 2; the ring temperature sensor 8, the refrigerating defrosting sensor 9, the refrigerating sensor 10 and the freezing sensor 11 are all electrically connected with the control board 7.
Further, the first heat dissipation mechanism comprises a first heat sink 61 and a first heat dissipation fan 62, wherein the first heat sink 61 is arranged on one side of the semiconductor refrigerating sheet 65 facing the refrigeration evaporator 5, and the first heat dissipation fan 62 is arranged on the first heat sink 61; the second heat dissipation mechanism includes a second heat sink 63 and a second heat dissipation fan 64, the second heat sink 63 is mounted on a side of the semiconductor cooling fin 65 away from the refrigeration evaporator 5, and the second heat dissipation fan 64 is mounted on the second heat sink 63.
Further, the first cooling fan 62, the second cooling fan 64 and the semiconductor cooling fin 65 are electrically connected to the control board 7.
Further, the first heat sink 61 and the second heat sink 63 are mounted on the semiconductor cooling fin 65 by screws, and contact and conduct heat with the heat conducting block by heat conducting glue, and transfer cold side cold energy and hot side heat energy of the semiconductor cooling fin 65 to the cold side heat sink and the hot side heat sink respectively for heat dissipation by fan reinforcement.
It should be noted that the cold side and the hot side of the semiconductor refrigeration sheet 65 are not fixed to one side, and when the connection mode of the H-bridge circuit is changed by the switching device, the cold side and the hot side of the semiconductor refrigeration sheet 65 are switched accordingly.
Further, the side end of the first heat sink 61 is provided with a heat insulation channel 66, and the heat insulation channel 66 is made of a heat insulation material.
The thermal insulation material of the thermal insulation channel 66 is not particularly limited, and may be required to meet the actual thermal insulation requirement, for example, in the embodiment of the present utility model, polyurethane foam or EPS foam is used as the thermal insulation material.
Referring to fig. 5, the present utility model further includes a control method of the refrigerating device of the direct-cooling refrigerator, including the following steps:
s1, powering on a refrigerator, and reading the temperature TH of an annular temperature sensor 8, the temperature TZ of a refrigerating defrosting sensor 9, the temperature TC of a refrigerating sensor 10 and the temperature TD of a freezing sensor 11 through a control board 7;
s2, comparing TC with TCon (set refrigeration starting point temperature), TD with TDon (set refrigeration starting point temperature), if TC is more than or equal to TCon and TD is more than or equal to TDon, turning to S3, if TC is more than or equal to TCon and TD is less than TDon, turning to S4, and if TC is less than TCon and TD is more than or equal to TDon, turning to S6;
s3, judging TH, and turning to S4 if TH is more than or equal to 32 ℃; if not, turning to S5;
s4: the compressor 3 operates, the semiconductor refrigeration mechanism 6 starts to operate, and a forward circuit is connected;
s5, judging TH, and turning to S6 if TH is less than or equal to 16 ℃; if not, turning to S7;
s6: the compressor 3 operates, the semiconductor refrigeration mechanism 6 starts to operate, and a negative circuit is connected;
s7, judging that TH, if TH is more than 16 ℃ and less than 32 ℃, the compressor 3 is operated, and the semiconductor refrigeration mechanism 6 is not operated;
s8, judging that TC is less than or equal to TCoff (set refrigeration shutdown point temperature) and TD is less than or equal to TDoff (set refrigeration shutdown point temperature), stopping the compressor 3, and stopping the operation of the semiconductor refrigeration mechanism 6;
s9, accumulating the running time N of the compressor 3, judging whether N is more than or equal to 48 hours, namely judging whether TZ is less than 3 ℃, if yes, turning to the S refrigerating sensor 10, and if not, turning to the S refrigerating sensor 11;
s, the refrigeration sensor 10 is used for starting the semiconductor refrigeration mechanism 6 to operate, and a forward circuit is connected;
s freeze sensor 11 semiconductor refrigeration mechanism 6 stops running.
The working principle of the utility model is as follows:
when the refrigerator operates under the condition of high ambient temperature or the load of the refrigerating chamber 1 is large, namely the heat leakage quantity of the refrigerating chamber 1 is large, the refrigerating chamber 1 has large refrigerating requirement, at the moment, the evaporation area of the refrigerating chamber 1 is smaller, the compression refrigerating mechanism is automatically adjusted, TZ is pulled down to ensure the refrigerating capacity Qc=KADeltaTc, wherein DeltaTc=TC-TZ, the temperature of the refrigerating chamber 2 is further reduced due to the fact that the refrigerating capacity requirement qd=KADeltaTd of the refrigerating chamber 2, deltaT=Td-TZ, and TZ is reduced, and the refrigerating chamber 2 enters the refrigerating evaporator 5 after entering the refrigerating evaporator 4, the temperature of the refrigerating chamber 2 is reduced, so that more refrigerating agent exists in the refrigerating evaporator 4, the heat exchange quantity of the refrigerating chamber 2 is increased, the heat exchange quantity of the refrigerating evaporator 5 is further deteriorated, and the temperature difference between the upper space and the lower space (upper heat and lower cold) of the refrigerating chamber 1 is increased;
at this time, the semiconductor refrigeration mechanism 6 is started, the H-bridge circuit is switched to a forward path through the switching device, the refrigerating evaporator 5 is heated by utilizing the hot side at the end of the first radiator 61, TZ is raised, the circulation efficiency of the compression refrigeration mechanism is improved, the temperature of the freezing chamber 2 is raised, meanwhile, the cold side cold energy at the end of the second radiator 63 is blown into the refrigerating chamber 1 through the first cooling fan 62, the temperature of the refrigerating chamber 1 is reduced, the refrigerating capacity of the freezing chamber 2 is reduced by adjusting the efficiency of the compression refrigeration mechanism and the refrigerating capacity conveying direction of the semiconductor refrigeration mechanism 6, and the refrigerating capacity of the refrigerating chamber 1 is increased, so that the problem of large cold energy requirement of the refrigerating chamber 1 is solved;
conversely, when the refrigerator operates under the condition of low ambient temperature or the load of the freezing chamber 2 is large, namely the heat leakage of the freezing chamber 2 is large, the refrigerating requirement of the freezing chamber 2 is large, the evaporation area of the freezing chamber 2 is larger, the compression refrigerating mechanism automatically adjusts to raise TZ, the heat exchange temperature difference delta T=Td-TZ of the freezing chamber 2 is smaller, and the refrigerating capacity requirement of the freezing chamber 2 cannot be met;
at this time, the semiconductor refrigeration mechanism 6 is started, the cold and hot sides of the semiconductor refrigeration sheet 65 are switched, the first radiator 61 end, namely the cold side, is used for supplying, the refrigerating evaporator 5 is cooled, the evaporation temperature of the compression refrigeration mechanism is reduced, the delta T is improved, the air heat exchange efficiency of the refrigerating evaporator 4 and the freezing chamber 2 is improved, the temperature of the freezing chamber 2 is reduced, meanwhile, the hot side heat of the second radiator 63 end is blown into the refrigerating chamber through the second cooling fan 64, the temperature of the refrigerating chamber 1 is increased, the starting time of the compressor 3 is further prolonged, and the heat exchange efficiency is improved through the heat exchange temperature difference of the freezing chamber 2; the refrigerating capacity of the refrigerating chamber 1 and the refrigerating chamber 2 is regulated by switching the heating capacity conveying direction of the semiconductor refrigerating plate 65, so that the problem of high refrigerating capacity requirement of the refrigerating chamber 2 is solved.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like 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 or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing describes one embodiment of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.
Claims (7)
1. The refrigerating device of the direct-cooling refrigerator comprises a refrigerating chamber (1) and a freezing chamber (2), and is characterized by further comprising
The compression refrigeration system comprises a compressor (3), an anti-condensation pipe is connected in series behind the compressor (3), a condenser is connected in series behind the anti-condensation pipe, a filter is connected in series behind the condenser, a capillary is connected in series behind the filter, a freezing evaporator (4) arranged in the freezing chamber (2) is connected in series behind the capillary, a refrigerating evaporator (5) arranged in the refrigerating chamber (1) is connected in series behind the freezing evaporator (4), and the refrigerating evaporator (5) is connected with the compressor (3) to form a circulation system;
the semiconductor refrigeration mechanism (6), the semiconductor refrigeration mechanism (6) comprises a semiconductor refrigeration sheet (65), one side of the semiconductor refrigeration sheet (65) faces the refrigeration evaporator (5) and is provided with a first heat dissipation mechanism; a second heat dissipation mechanism is arranged on one side, far away from the first heat dissipation mechanism, of the semiconductor refrigerating sheet (65); two sides of the semiconductor refrigerating sheet (65) are respectively connected with the switching devices to form an H-bridge circuit;
the control mechanism comprises a control board (7) arranged on the box body, an ambient temperature sensor (8) arranged outside the box body and used for detecting the external environment temperature of the refrigerator, a refrigeration defrosting sensor (9) arranged on the refrigeration evaporator (5) and used for detecting the temperature of the refrigeration evaporator (5), a refrigeration sensor (10) arranged inside the refrigeration chamber (1) and used for detecting the internal temperature of the refrigeration chamber (1), and a freezing sensor (11) arranged inside the freezing chamber (2) and used for detecting the internal temperature of the freezing chamber (2); the ring temperature sensor (8), the refrigerating defrosting sensor (9), the refrigerating sensor (10) and the freezing sensor (11) are electrically connected with the control board (7).
2. The direct-cooling refrigerator refrigerating apparatus according to claim 1, wherein the first heat dissipating mechanism comprises a first heat sink (61) and a first heat dissipating fan (62), the first heat sink (61) is mounted on a side of the semiconductor refrigerating sheet (65) facing the refrigerating evaporator (5), and the first heat dissipating fan (62) is mounted on the first heat sink (61); the second heat dissipation mechanism comprises a second heat radiator (63) and a second heat dissipation fan (64), the second heat radiator (63) is arranged on one side, far away from the refrigeration evaporator (5), of the semiconductor refrigerating sheet (65), and the second heat dissipation fan (64) is arranged on the second heat radiator (63).
3. The direct-cooling refrigerator refrigerating device according to claim 2, wherein the first cooling fan (62), the second cooling fan (64) and the semiconductor refrigerating sheet (65) are electrically connected with the control board (7).
4. The direct-cooling refrigerator refrigerating device according to claim 2, wherein the first heat sink (61) and the second heat sink (63) are mounted on the semiconductor refrigerating sheet (65) by screws, and are in contact with the heat conducting block by heat conducting glue for conducting heat.
5. The direct-cooling refrigerator refrigerating device according to claim 4, wherein a heat-insulating channel (66) is arranged at the side end of the first radiator (61), and a preparation material of the heat-insulating channel (66) is a heat-insulating material.
6. The direct-cooling refrigerator refrigerating apparatus according to claim 1, wherein the switching device is a MOS transistor or a relay.
7. A control method of a refrigerating apparatus of a direct-cooling refrigerator according to any one of claims 1 to 6, comprising the steps of:
s1, powering on a refrigerator, and reading the temperature TH of a ring temperature sensor (8), the temperature TZ of a refrigerating defrosting sensor (9), the temperature TC of a refrigerating sensor (10) and the temperature TD of a freezing sensor (11) through a control board (7);
s2, comparing TC with TCon (set refrigeration starting point temperature), TD with TDon (set refrigeration starting point temperature), if TC is more than or equal to TCon and TD is more than or equal to TDon, turning to S3, if TC is more than or equal to TCon and TD is less than TDon, turning to S4, and if TC is less than TCon and TD is more than or equal to TDon, turning to S6;
s3, judging TH, and turning to S4 if TH is more than or equal to 32 ℃; if not, turning to S5;
s4: the compressor (3) operates, the semiconductor refrigeration mechanism (6) starts to operate, and the forward circuit is connected;
s5, judging TH, and turning to S6 if TH is less than or equal to 16 ℃; if not, turning to S7;
s6: the compressor (3) operates, the semiconductor refrigeration mechanism (6) is started to operate, and a negative circuit is connected;
s7, judging that TH is not operated if TH is more than 16 ℃ and less than 32 ℃, and the compressor (3) is operated and the semiconductor refrigeration mechanism (6) is not operated;
s8, judging that TC is less than or equal to TCoff (set refrigeration shutdown point temperature) and TD is less than or equal to TDoff (set refrigeration shutdown point temperature), stopping the compressor (3), and stopping the operation of the semiconductor refrigeration mechanism (6);
s9, accumulating the running time N of the compressor (3), judging whether N is more than or equal to 48 hours, namely judging whether TZ is less than 3 ℃, if so, turning to the S refrigerating sensor (10), and if not, turning to the S freezing sensor (11);
s10, starting the semiconductor refrigeration mechanism (6) to operate, and switching on a forward circuit;
s11, stopping the operation of the semiconductor refrigeration mechanism (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310205712.6A CN116294364A (en) | 2023-03-06 | 2023-03-06 | Refrigerating device of direct-cooling refrigerator and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310205712.6A CN116294364A (en) | 2023-03-06 | 2023-03-06 | Refrigerating device of direct-cooling refrigerator and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116294364A true CN116294364A (en) | 2023-06-23 |
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ID=86800785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310205712.6A Pending CN116294364A (en) | 2023-03-06 | 2023-03-06 | Refrigerating device of direct-cooling refrigerator and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116294364A (en) |
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2023
- 2023-03-06 CN CN202310205712.6A patent/CN116294364A/en active Pending
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