CN113970212A - Refrigerator and refrigerator defrosting method - Google Patents

Refrigerator and refrigerator defrosting method Download PDF

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Publication number
CN113970212A
CN113970212A CN202111207934.9A CN202111207934A CN113970212A CN 113970212 A CN113970212 A CN 113970212A CN 202111207934 A CN202111207934 A CN 202111207934A CN 113970212 A CN113970212 A CN 113970212A
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CN
China
Prior art keywords
defrosting
refrigerator
controlling
control module
auxiliary control
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Granted
Application number
CN202111207934.9A
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Chinese (zh)
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CN113970212B (en
Inventor
王瑶瑶
孙彬
石映晖
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Hisense Shandong Refrigerator Co Ltd
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Hisense Shandong Refrigerator Co Ltd
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Priority to CN202111207934.9A priority Critical patent/CN113970212B/en
Publication of CN113970212A publication Critical patent/CN113970212A/en
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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
    • 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
    • F25B31/00—Compressor arrangements
    • 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
    • F25B41/30—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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • 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
    • F25B49/022—Compressor control arrangements
    • 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
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D29/005—Mounting of control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • 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
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • 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)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Defrosting Systems (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention discloses a refrigerator, comprising: a cabinet serving as a support structure of the refrigerator; the refrigeration system comprises a compressor, a control valve, a condenser, an evaporator and an auxiliary control module; the auxiliary control module is respectively connected with the compressor and the evaporator; the auxiliary control module is used for controlling the air return state of an air return pipe of the compressor; the controller is configured to: controlling the defrosting channel of the control valve to be opened and the refrigerating channel to be closed in response to the defrosting operation of the refrigerator; when the environment temperature is detected to be greater than the environment temperature threshold value, controlling the auxiliary control module to stop working; and when the detected ambient temperature is less than or equal to the ambient temperature threshold value, controlling the auxiliary control module to work. The invention also discloses a defrosting method of the refrigerator. By adopting the embodiment of the invention, the defrosting can still be reliably carried out at a lower ambient temperature, and the problem of air return and liquid impact of the compressor is avoided.

Description

Refrigerator and refrigerator defrosting method
Technical Field
The invention relates to the field of refrigerators, in particular to a refrigerator and a defrosting method of the refrigerator.
Background
The condenser is a heat radiating part of the refrigerator, and can radiate high-temperature and high-pressure refrigerant gas treated by the compressor into surrounding air through heat exchange and cool the refrigerant gas into liquid to realize heat exchange. The condenser can discharge heat in the running process of the refrigerator, and a part of the refrigerator utilizes the heat emitted by the condenser for defrosting the refrigerator, but the defrosting scheme is heat conduction and completely depends on the condensation heat in the conventional running state of the system, but the actual situation is usually insufficient, and the defrosting requirement cannot be finished particularly in a low-temperature environment; and the refrigerant after defrosting and cooling returns to the compressor in a liquid state, so that the service life of the compressor can be reduced after long-term operation.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a refrigerator defrosting method, which can reliably defrost at a lower ambient temperature and avoid the problem of air return liquid impact of a compressor.
To achieve the above object, an embodiment of the present invention provides a refrigerator, including:
a cabinet serving as a support structure of the refrigerator and having a plurality of storage compartments therein;
the refrigeration system comprises a compressor, a control valve, a condenser, an evaporator and an auxiliary control module; the auxiliary control module is respectively connected with the compressor and the evaporator; the auxiliary control module is used for controlling the air return state of an air return pipe of the compressor;
the controller is configured to:
responding to the defrosting operation of the refrigerator, and controlling the opening of a conventional channel, the opening of a defrosting channel and the closing of a refrigerating channel of the control valve;
when the environment temperature is detected to be greater than a preset environment temperature threshold value, controlling the auxiliary control module to stop working;
and when the environment temperature is detected to be less than or equal to the environment temperature threshold value, controlling the auxiliary control module to work.
As an improvement of the above, the controller is further configured to:
and responding to the refrigeration operation of the refrigerator, controlling the opening of a conventional channel, the closing of a defrosting channel and the opening of a refrigeration channel of the control valve, and controlling the auxiliary control module to stop working.
As an improvement of the above, after controlling the auxiliary control module to stop operating, the controller is further configured to:
acquiring the defrosting temperature of the evaporator;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
As an improvement of the above, after controlling the auxiliary control module to operate, the controller is further configured to:
acquiring the exhaust temperature of an exhaust port of the compressor and the defrosting temperature of the evaporator;
when the exhaust temperature is greater than a preset exhaust temperature threshold value, controlling the auxiliary control module to stop working;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
As a modification of the above, the auxiliary control module is at least one of a temperature heating element or a pressure regulating element.
In order to achieve the above object, an embodiment of the present invention further provides a defrosting method for a refrigerator, which is applied to a refrigerator, where a refrigeration system of the refrigerator includes: the system comprises a compressor, a control valve, a condenser, an evaporator and an auxiliary control module; the auxiliary control module is respectively connected with the compressor and the evaporator; the auxiliary control module is used for controlling the air return state of an air return pipe of the compressor; the refrigerator defrosting method comprises the following steps:
responding to the defrosting operation of the refrigerator, and controlling the opening of a conventional channel, the opening of a defrosting channel and the closing of a refrigerating channel of the control valve;
when the environment temperature is detected to be greater than a preset environment temperature threshold value, controlling the auxiliary control module to stop working;
and when the environment temperature is detected to be less than or equal to the environment temperature threshold value, controlling the auxiliary control module to work.
As an improvement of the above, the method further comprises:
and responding to the refrigeration operation of the refrigerator, controlling the opening of a conventional channel, the closing of a defrosting channel and the opening of a refrigeration channel of the control valve, and controlling the auxiliary control module to stop working.
As an improvement of the above solution, after controlling the auxiliary control module to stop operating, the method further includes:
acquiring the defrosting temperature of the evaporator;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
As an improvement of the above solution, after controlling the auxiliary control module to operate, the method further includes:
acquiring the exhaust temperature of an exhaust port of the compressor and the defrosting temperature of the evaporator;
when the exhaust temperature is greater than a preset exhaust temperature threshold value, controlling the auxiliary control module to stop working;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
As a modification of the above, the auxiliary control module is at least one of a temperature heating element or a pressure regulating element.
Compared with the prior art, the refrigerator and the refrigerator defrosting method provided by the embodiment of the invention have the advantages that the control valves of the three channels are arranged in the refrigerating system, different channels are respectively conducted during the refrigerating and defrosting of the refrigerator, when the refrigerating channels are conducted, the refrigerating system is normally refrigerated, when the defrosting channels are conducted, the exhaust temperature of the compressor is utilized to defrost the evaporator, when the ambient temperature is lower, the auxiliary control module is combined to further defrost, the defrosting can still be reliably performed at the lower ambient temperature, and the problem of liquid impact of air returning of the compressor is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a refrigeration system in a refrigerator according to an embodiment of the present invention;
fig. 3 is a flowchart of a refrigerator defrosting method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention, where the refrigerator includes: a cabinet 10, a refrigeration system 20, and a controller 30.
The refrigerator body 10 serves as a support structure of a refrigerator, and a plurality of storage compartments are formed therein.
Referring to fig. 2, the refrigeration system 20 includes: a compressor 21, a control valve 22, a condenser 23, an evaporator 24, and an auxiliary control module 25; wherein, the normal channel 22a of the control valve 22 is connected with the compressor 21, the defrosting channel 22b is connected with the evaporator 24, the refrigerating channel 22c is connected with the condenser 23, and the auxiliary control module 25 is respectively connected with the compressor 21 and the evaporator 24; the auxiliary control module 25 is configured to control a return air state of a return air pipe of the compressor 21.
Further, the refrigeration system 20 further includes a temperature sensor 26 disposed at a discharge port of the compressor 21, and the temperature sensor 26 is configured to detect a discharge temperature of the compressor 21. The refrigeration system 20 also includes a dry filter 27 and a capillary tube 28.
The controller 30 is configured to:
in response to the defrosting operation of the refrigerator, the normal passage 22a of the control valve 22 is controlled to be opened, the defrosting passage 22b is controlled to be opened, and the refrigerating passage 22c is controlled to be closed;
when the environment temperature is detected to be greater than a preset environment temperature threshold value, controlling the auxiliary control module 25 to stop working;
and when the environment temperature is detected to be less than or equal to the environment temperature threshold value, controlling the auxiliary control module 25 to work.
For example, when the refrigerator needs defrosting, the normal passage 22a of the control valve 22 is controlled to be opened, the defrosting passage 22b is controlled to be opened, and the cooling passage 22c is controlled to be closed, the passages of the compressor 21, the normal passage 22a, the defrosting passage 22b, the evaporator 24 and the auxiliary control module 25 are conducted, and the evaporator 24 is defrosted by hot gas at the exhaust port of the compressor 21. In this process, a defrosting control operation needs to be further performed in combination with the ambient temperature.
And when the environment temperature is detected to be greater than a preset environment temperature threshold value, controlling the auxiliary control module 25 to stop working. The environment temperature threshold is a boundary temperature for evaluating whether liquid impact is generated in the return air of the compressor 21 in high-temperature and low-temperature environments, the exhaust temperature of the compressor 21 body is high under the high-temperature condition, the refrigerant can be basically vaporized in the return air pipe return air process, and the risk of liquid impact of the compressor does not exist.
And when the environment temperature is detected to be less than or equal to the environment temperature threshold value, controlling the auxiliary control module 25 to work. In a low temperature state, the exhaust temperature of the compressor 21 is low, which is not enough to completely defrost the evaporator 24, and needs to be adjusted by the auxiliary control module 25, and in addition, the ambient temperature is low, the state of the refrigerant in the return pipe of the compressor 21 cannot be guaranteed, and liquid slugging may occur, so that the return gas state of the return pipe of the compressor needs to be controlled by the auxiliary control module 25, and liquid slugging is avoided.
Optionally, the auxiliary control module 25 is at least one of a temperature heating element or a pressure regulating element; when the temperature heating element works, the refrigerant is heated to be vaporized at high temperature, and the high-temperature vaporization heating element is used for further increasing the return air temperature; the pressure regulating element regulates the flow of the refrigerant by regulating the valve opening of the pressure regulating element, the valve opening is small, the return air pressure is low, the flow rate of the return air port is low, and the pressure regulating element can be used for preventing liquid impact and improving the exhaust temperature of the compressor 21.
Optionally, the controller 30 is further configured to:
in response to a cooling operation of the refrigerator, the normal passage 22a of the control valve 22 is controlled to be opened, the defrosting passage 22b is controlled to be closed, and the cooling passage 22c is controlled to be opened, and the supplementary control module 25 is controlled to be stopped.
Illustratively, when the refrigerator is normally refrigerating, the normal passage 22a is opened, the defrosting passage 22b is closed, and the refrigerating passage 22c is opened, and then the passages of the compressor 21, the normal passage 22a, the refrigerating passage 22c, the condenser 23, the dry filter 27, the capillary tube 28, and the evaporator 24 are conducted. When the running time of the refrigerator is greater than the running time threshold value, the refrigerator starts to defrost, the compressor 21 is controlled to continue running at the moment, the control valve 21 switches the state, the conventional channel 22a is opened, the defrosting channel 22b is opened, and the refrigerating channel 22c is closed.
Further, after controlling the auxiliary control module 25 to stop operating during the defrosting operation of the refrigerator, the controller 30 is further configured to:
acquiring the defrosting temperature of the evaporator 24;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
Illustratively, a defrosting sensor located on the evaporator 24 detects a defrosting temperature Te, and defrosting is finished when the defrosting temperature Te reaches a defrosting temperature threshold Te 0. At this time, the control valve 22 is operated to switch the flow paths, the normal path 22a is opened, the defrosting path 22b is closed, and the cooling path 22c is opened.
Further, after controlling the auxiliary control module 25 to operate during the defrosting operation of the refrigerator, the controller 30 is further configured to:
acquiring a discharge temperature of a discharge port of the compressor 21 and a defrosting temperature of the evaporator 24;
when the exhaust temperature is greater than a preset exhaust temperature threshold value, controlling the auxiliary control module 25 to stop working;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
Illustratively, the temperature sensor 26 at the discharge of the compressor 21 detects the discharge temperature Tc, and the auxiliary control element 25 stops operating when the detected discharge temperature Tc reaches the discharge temperature threshold Tc0, otherwise it continues operating. Meanwhile, when the defrosting temperature Te reaches the defrosting temperature threshold Te0, defrosting is finished. At this time, the control valve 22 is operated to switch the flow paths, the normal path 22a is opened, the defrosting path 22b is closed, and the cooling path 22c is opened.
Compared with the prior art, the refrigerator provided by the embodiment of the invention has the advantages that the control valves 22 of the three channels are arranged in the refrigerating system 20, different channels are respectively conducted during refrigerating and defrosting of the refrigerator, when the refrigerating channels are conducted, the refrigerating system is normally refrigerated, when the defrosting channels are conducted, the evaporator 24 is defrosted by utilizing the exhaust temperature of the compressor 21, defrosting is further conducted by combining the auxiliary control module when the ambient temperature is lower, defrosting can still be reliably conducted at lower ambient temperature, and the problem of liquid impact caused by air return of the compressor is avoided.
Referring to fig. 3, fig. 3 is a flowchart of a refrigerator defrosting method according to an embodiment of the present invention, the refrigerator defrosting method is applied to a refrigerator, and a refrigeration system of the refrigerator includes: the system comprises a compressor, a control valve, a condenser, an evaporator and an auxiliary control module; the auxiliary control module is respectively connected with the compressor and the evaporator; the auxiliary control module is used for controlling the air return state of an air return pipe of the compressor; the refrigerator defrosting method comprises the following steps:
s11, responding to the defrosting operation of the refrigerator, and controlling the opening of a conventional channel, the opening of a defrosting channel and the closing of a refrigerating channel of the control valve;
s12, when the environment temperature is detected to be larger than a preset environment temperature threshold value, controlling the auxiliary control module to stop working;
and S13, controlling the auxiliary control module to work when the environment temperature is detected to be less than or equal to the environment temperature threshold value.
Illustratively, when the refrigerator needs defrosting, the control valve is controlled to open a conventional channel, open a defrosting channel and close a refrigerating channel, the compressor, the conventional channel, the defrosting channel, the evaporator and the auxiliary control module are communicated, and hot gas at the exhaust port of the compressor is used for defrosting the evaporator. In this process, a defrosting control operation needs to be further performed in combination with the ambient temperature.
And when the environment temperature is detected to be greater than a preset environment temperature threshold value, controlling the auxiliary control module to stop working. The environment temperature threshold is a boundary temperature for evaluating whether liquid impact is generated in return air of the compressor in high-temperature and low-temperature environments, the exhaust temperature of the compressor body is higher under the high-temperature condition, a refrigerant can be basically vaporized in the return air pipe return air process, and the risk of liquid impact of the compressor does not exist.
And when the environment temperature is detected to be less than or equal to the environment temperature threshold value, controlling the auxiliary control module to work. Under the low temperature state, the exhaust temperature of compressor is low, is not enough to make the evaporimeter is completely defrosted, needs adjust with the help of auxiliary control module, and the ambient temperature is low in other borders, and the refrigerant can't guarantee at the state of compressor muffler, probably takes place the liquid hammer, consequently need control with the help of auxiliary control module the return-air state of the muffler of compressor avoids taking place the liquid hammer.
Optionally, the auxiliary control module is at least one of a temperature heating element or a pressure regulating element; when the temperature heating element works, the refrigerant is heated to be vaporized at high temperature, and the high-temperature vaporization heating element is used for further increasing the return air temperature; the pressure regulating element regulates the flow of the refrigerant by regulating the valve opening of the pressure regulating element, the valve opening is small, the return air pressure is low, the flow speed of the return air port is low, and the pressure regulating element can be used for preventing liquid impact and improving the exhaust temperature of the compressor.
Optionally, the refrigerator defrosting method further includes step S21:
and S21, responding to the refrigeration operation of the refrigerator, controlling the opening of the normal channel, the closing of the defrosting channel and the opening of the refrigeration channel of the control valve, and controlling the auxiliary control module to stop working.
For example, when the refrigerator is normally cooled, the normal passage is opened, the defrosting passage is closed, and the cooling passage is opened, and at this time, the passages of the compressor, the normal passage, the cooling passage, the condenser, the dry filter, the capillary tube, and the evaporator are conducted. When the running time of the refrigerator is greater than the running time threshold value, the refrigerator starts to defrost, the compressor is controlled to continue running at the moment, the control valve switches states, and the conventional channel is opened, the defrosting channel is opened, and the refrigerating channel is closed.
Further, after controlling the auxiliary control module to stop operating during the defrosting operation of the refrigerator in step S12, the refrigerator defrosting method further includes steps S121 to S122:
s121, acquiring the defrosting temperature of the evaporator;
and S122, when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
Illustratively, a defrosting sensor located on the evaporator detects a defrosting temperature Te, and defrosting is finished when the defrosting temperature Te reaches a defrosting temperature threshold Te 0. At the moment, the control valve acts to switch the flow path, the conventional channel is opened, the defrosting channel is closed, and the refrigerating channel is opened.
Further, in the defrosting operation of the refrigerator in step S13, after controlling the auxiliary control module to operate, the refrigerator defrosting method further includes steps S131 to S133:
s131, acquiring the exhaust temperature of an exhaust port of the compressor and the defrosting temperature of the evaporator;
s132, when the exhaust temperature is larger than a preset exhaust temperature threshold value, controlling the auxiliary control module to stop working;
and S133, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator when the defrosting temperature is greater than a preset defrosting temperature threshold value.
Illustratively, a temperature sensor at the discharge port of the compressor detects the discharge temperature Tc, and the auxiliary control element stops working when the detected discharge temperature Tc reaches a discharge temperature threshold Tc0, otherwise, the auxiliary control element continues working. Meanwhile, when the defrosting temperature Te reaches the defrosting temperature threshold Te0, defrosting is finished. At the moment, the control valve acts to switch the flow path, the conventional channel is opened, the defrosting channel is closed, and the refrigerating channel is opened.
Compared with the prior art, the refrigerator defrosting method provided by the embodiment of the invention has the advantages that the control valves of the three channels are arranged in the refrigerating system, different channels are respectively conducted during the refrigerating and defrosting of the refrigerator, when the refrigerating channels are conducted, the refrigerating system is normally refrigerated, when the defrosting channels are conducted, the exhaust temperature of the compressor is utilized to defrost the evaporator, when the ambient temperature is lower, the auxiliary control module is combined to further defrost, the defrosting can still be reliably performed at the lower ambient temperature, and the problem of liquid impact of the return air of the compressor is avoided.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. A refrigerator, characterized by comprising:
a cabinet serving as a support structure of the refrigerator and having a plurality of storage compartments therein;
the refrigeration system comprises a compressor, a control valve, a condenser, an evaporator and an auxiliary control module; the auxiliary control module is respectively connected with the compressor and the evaporator; the auxiliary control module is used for controlling the air return state of an air return pipe of the compressor;
the controller is configured to:
responding to the defrosting operation of the refrigerator, and controlling the opening of a conventional channel, the opening of a defrosting channel and the closing of a refrigerating channel of the control valve;
when the environment temperature is detected to be greater than a preset environment temperature threshold value, controlling the auxiliary control module to stop working;
and when the environment temperature is detected to be less than or equal to the environment temperature threshold value, controlling the auxiliary control module to work.
2. The refrigerator of claim 1, wherein the controller is further configured to:
and responding to the refrigeration operation of the refrigerator, controlling the opening of a conventional channel, the closing of a defrosting channel and the opening of a refrigeration channel of the control valve, and controlling the auxiliary control module to stop working.
3. The refrigerator of claim 1, wherein after controlling the auxiliary control module to stop operating, the controller is further configured to:
acquiring the defrosting temperature of the evaporator;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
4. The refrigerator of claim 1, wherein after controlling the auxiliary control module to operate, the controller is further configured to:
acquiring the exhaust temperature of an exhaust port of the compressor and the defrosting temperature of the evaporator;
when the exhaust temperature is greater than a preset exhaust temperature threshold value, controlling the auxiliary control module to stop working;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
5. The refrigerator of claim 1, wherein the auxiliary control module is at least one of a temperature heating element or a pressure regulating element.
6. The refrigerator defrosting method is characterized by being applicable to a refrigerator, and a refrigerating system of the refrigerator comprises the following steps: the system comprises a compressor, a control valve, a condenser, an evaporator and an auxiliary control module; the auxiliary control module is respectively connected with the compressor and the evaporator; the auxiliary control module is used for controlling the air return state of an air return pipe of the compressor; the refrigerator defrosting method comprises the following steps:
responding to the defrosting operation of the refrigerator, and controlling the opening of a conventional channel, the opening of a defrosting channel and the closing of a refrigerating channel of the control valve;
when the environment temperature is detected to be greater than a preset environment temperature threshold value, controlling the auxiliary control module to stop working;
and when the environment temperature is detected to be less than or equal to the environment temperature threshold value, controlling the auxiliary control module to work.
7. The refrigerator defrosting method of claim 6, further comprising:
and responding to the refrigeration operation of the refrigerator, controlling the opening of a conventional channel, the closing of a defrosting channel and the opening of a refrigeration channel of the control valve, and controlling the auxiliary control module to stop working.
8. The refrigerator defrosting method of claim 6, wherein after controlling the auxiliary control module to stop operating, the method further comprises:
acquiring the defrosting temperature of the evaporator;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
9. The refrigerator defrosting method of claim 6, wherein after controlling the auxiliary control module to operate, the method further comprises:
acquiring the exhaust temperature of an exhaust port of the compressor and the defrosting temperature of the evaporator;
when the exhaust temperature is greater than a preset exhaust temperature threshold value, controlling the auxiliary control module to stop working;
and when the defrosting temperature is greater than a preset defrosting temperature threshold value, controlling the refrigerator to finish defrosting and executing the refrigerating operation of the refrigerator.
10. The refrigerator defrosting method of claim 6, wherein the auxiliary control module is at least one of a temperature heating element or a pressure adjusting element.
CN202111207934.9A 2021-10-18 2021-10-18 Refrigerator and refrigerator defrosting method Active CN113970212B (en)

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CN112984881A (en) * 2021-03-05 2021-06-18 四川长虹空调有限公司 Liquid return judgment method and system for compressor of refrigeration system
CN115751823A (en) * 2022-12-22 2023-03-07 珠海格力电器股份有限公司 Anti-condensation system of air return pipe and refrigerator

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CN104697251A (en) * 2013-12-10 2015-06-10 苏州三星电子有限公司 Refrigerator and refrigeration system of refrigerator
CN110260582A (en) * 2019-06-05 2019-09-20 合肥华凌股份有限公司 Defrosting system and refrigeration equipment with the defrosting system
CN110425112A (en) * 2019-08-12 2019-11-08 郑州海尔空调器有限公司 The control method of the air-conditioning of anti-compressor liquid hammer and anti-compressor liquid hammer

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US4662184A (en) * 1986-01-06 1987-05-05 General Electric Company Single-sensor head pump defrost control system
CN2543004Y (en) * 2002-04-23 2003-04-02 广东科龙电器股份有限公司 Direct-cooling refrigerator
CN104697251A (en) * 2013-12-10 2015-06-10 苏州三星电子有限公司 Refrigerator and refrigeration system of refrigerator
CN110260582A (en) * 2019-06-05 2019-09-20 合肥华凌股份有限公司 Defrosting system and refrigeration equipment with the defrosting system
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Publication number Priority date Publication date Assignee Title
CN112984881A (en) * 2021-03-05 2021-06-18 四川长虹空调有限公司 Liquid return judgment method and system for compressor of refrigeration system
CN112984881B (en) * 2021-03-05 2023-03-24 四川长虹空调有限公司 Liquid return judgment method and system for compressor of refrigeration system
CN115751823A (en) * 2022-12-22 2023-03-07 珠海格力电器股份有限公司 Anti-condensation system of air return pipe and refrigerator

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