CN113915859A - Refrigerator and control method thereof - Google Patents

Refrigerator and control method thereof Download PDF

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Publication number
CN113915859A
CN113915859A CN202110135727.0A CN202110135727A CN113915859A CN 113915859 A CN113915859 A CN 113915859A CN 202110135727 A CN202110135727 A CN 202110135727A CN 113915859 A CN113915859 A CN 113915859A
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China
Prior art keywords
temperature
radio frequency
temperature difference
fan
refrigerator
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Granted
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CN202110135727.0A
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Chinese (zh)
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CN113915859B (en
Inventor
赵强
段跃斌
李秀军
侯同尧
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Hisense Shandong Refrigerator Co Ltd
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Hisense Shandong Refrigerator Co Ltd
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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
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/36—Freezing; Subsequent thawing; Cooling
    • A23L3/365—Thawing subsequent to freezing
    • 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
    • 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
    • F25D23/00—General constructional features
    • F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y02A40/963—Off-grid food refrigeration
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
    • Y02P60/85—Food storage or conservation, e.g. cooling or drying

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Nutrition Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
  • Electric Ovens (AREA)
  • Transmitters (AREA)

Abstract

The invention discloses a refrigerator, comprising: the radio frequency unfreezing system unfreezes the food material to be unfrozen by outputting a radio frequency output signal; the fan is used for radiating the heat of the radio frequency unfreezing system; the radio frequency cooling air door is used for controlling the ventilation quantity of the refrigerator; the controller is configured to: acquiring the exhaust temperature of an exhaust port and the intake temperature of an air inlet of a refrigerator, and acquiring the temperature of a thawing cavity in the radio frequency thawing system and the temperature of a refrigerating chamber of the refrigerator; calculating a first temperature difference between the exhaust temperature and the intake air temperature, and calculating a second temperature difference between the temperature of the thawing chamber and the temperature of the refrigerating chamber; and adjusting the rotating speed of the fan according to the first temperature difference and the second temperature difference, and adjusting the opening of the radio frequency cooling air door according to the rotating speed of the fan. The invention further discloses a refrigerator control method, and by adopting the embodiment of the invention, the heat dissipation of the radio frequency thawing system can be effectively carried out in the radio frequency thawing process, so that the normal work of the refrigerator is ensured.

Description

Refrigerator and control method thereof
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a refrigerator and a control method thereof.
Background
In recent years, with the rapid development of eating habits and life rhythms, in consumer demand research in the household appliance industry, the market demand for fast thawing of frozen foods is more and more strong, and a refrigerator is used as a direct medium for storing and freezing food materials, so that a user expects a thawing function. The radio frequency system of unfreezing can accelerate the speed of unfreezing, but in practical application, the radio frequency system of unfreezing begins the back of work, can produce a large amount of heats, if not timely heat dissipation, the temperature can rise to more than 70 ℃, seriously influences food material effect and the normal work of refrigerator of unfreezing, also brings the potential safety hazard simultaneously.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a control method thereof, which can effectively dissipate heat of a radio frequency unfreezing system in a radio frequency unfreezing process and ensure the normal work of the refrigerator.
To achieve the above object, an embodiment of the present invention provides a refrigerator, including:
the radio frequency unfreezing system unfreezes the food material to be unfrozen by outputting a radio frequency output signal;
the fan is used for radiating the heat of the radio frequency unfreezing system;
the radio frequency cooling air door is used for controlling the ventilation quantity of the refrigerator;
the controller is configured to:
acquiring the exhaust temperature of an exhaust port and the intake temperature of an air inlet of a refrigerator, and acquiring the temperature of a thawing cavity in the radio frequency thawing system and the temperature of a refrigerating chamber of the refrigerator;
calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the thawing chamber and the temperature of the refrigerating chamber;
and adjusting the rotating speed of the fan according to the first temperature difference and the second temperature difference, and adjusting the opening of the radio frequency cooling air door according to the rotating speed of the fan.
As an improvement of the above scheme, the fan is preset with a rotation speed grade, the rotation speed grade comprises a first rotation speed, a second rotation speed and a third rotation speed, the first rotation speed is greater than the second rotation speed, and the second rotation speed is greater than the third rotation speed; then, the adjusting the rotation speed of the fan according to the first temperature difference and the second temperature difference includes:
when the first temperature difference or the second temperature difference is larger than or equal to a preset high-temperature threshold value, controlling the rotating speed of the fan to be a first rotating speed;
when the first temperature difference or the second temperature difference is smaller than a high-temperature threshold and larger than a preset low-temperature threshold, controlling the rotating speed of the fan to be a second rotating speed;
and when the first temperature difference or the second temperature difference is smaller than or equal to a low-temperature threshold value, controlling the rotating speed of the fan to be a third rotating speed.
As an improvement of the above scheme, the radio frequency cooling air door is preset with air door opening degree grades, the air door opening degree grades comprise a first air door opening degree and a second air door opening degree, and the first air door opening degree is greater than the second air door opening degree; then, the adjusting the opening of the radio frequency cooling damper according to the rotation speed of the fan includes:
when the rotating speed of the fan is a first rotating speed or a second rotating speed, controlling the opening of the radio frequency cooling air door to be the first air door opening;
and when the rotating speed of the fan is a third rotating speed, controlling the opening of the radio frequency cooling air door to be the opening of the second air door.
As an improvement of the above, when the first temperature difference or the second temperature difference is greater than or equal to a preset high temperature threshold, the controller is further configured to:
acquiring a first accumulated number of times that the first temperature difference is greater than or equal to the high temperature threshold;
acquiring a second accumulated number of times that the second temperature difference is greater than or equal to the high temperature threshold;
and when the first accumulated times or the second accumulated times is larger than a preset time threshold value, controlling the radio frequency unfreezing system to stop working.
As an improvement of the above, the controller is further configured to:
and acquiring food material information of the food material to be unfrozen, and controlling the radio frequency unfreezing system to output an initial radio frequency output signal according to the food material information.
As an improvement of the above scheme, the food material information includes at least one of a kind, a quality and an initial temperature of the food material to be thawed.
In order to achieve the above object, an embodiment of the present invention further provides a refrigerator control method, including:
acquiring the exhaust temperature of an exhaust port and the intake temperature of an air inlet of a refrigerator, and acquiring the temperature of a thawing cavity in a radio frequency thawing system of the refrigerator and the temperature of a refrigerating chamber of the refrigerator; the radio frequency thawing system is used for thawing food materials to be thawed in the thawing cavity by outputting a radio frequency output signal;
calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the thawing chamber and the temperature of the refrigerating chamber;
and adjusting the rotating speed of a fan of the refrigerator according to the first temperature difference and the second temperature difference, and adjusting the opening of a radio frequency cooling air door of the refrigerator according to the rotating speed of the fan.
As an improvement of the above scheme, the fan is preset with a rotation speed grade, the rotation speed grade comprises a first rotation speed, a second rotation speed and a third rotation speed, the first rotation speed is greater than the second rotation speed, and the second rotation speed is greater than the third rotation speed; then, the adjusting the rotation speed of the fan of the refrigerator according to the first temperature difference and the second temperature difference includes:
when the first temperature difference or the second temperature difference is larger than or equal to a preset high-temperature threshold value, controlling the rotating speed of the fan to be a first rotating speed;
when the first temperature difference or the second temperature difference is smaller than a high-temperature threshold and larger than a preset low-temperature threshold, controlling the rotating speed of the fan to be a second rotating speed;
and when the first temperature difference or the second temperature difference is smaller than or equal to a low-temperature threshold value, controlling the rotating speed of the fan to be a third rotating speed.
As an improvement of the above scheme, the radio frequency cooling air door is preset with air door opening degree grades, the air door opening degree grades comprise a first air door opening degree and a second air door opening degree, and the first air door opening degree is greater than the second air door opening degree; then, the adjusting the opening of the radio frequency cooling damper of the refrigerator according to the rotation speed of the fan includes:
when the rotating speed of the fan is a first rotating speed or a second rotating speed, controlling the opening of the radio frequency cooling air door to be the first air door opening;
and when the rotating speed of the fan is a third rotating speed, controlling the opening of the radio frequency cooling air door to be the opening of the second air door.
As an improvement of the above, when the first temperature difference or the second temperature difference is greater than or equal to a preset high temperature threshold, the method further includes:
acquiring a first accumulated number of times that the first temperature difference is greater than or equal to the high temperature threshold;
acquiring a second accumulated number of times that the second temperature difference is greater than or equal to the high temperature threshold;
and when the first accumulated times or the second accumulated times is larger than a preset time threshold value, controlling the radio frequency unfreezing system to stop working.
Compared with the prior art, the refrigerator and the control method thereof disclosed by the embodiment of the invention have the advantages that the radio frequency output signal is output by the radio frequency unfreezing system to unfreeze the food material to be unfrozen, and in the unfreezing process, the exhaust temperature and the intake temperature of the refrigerator are firstly obtained, and the temperature of the injection unfreezing cavity and the temperature of the refrigerating chamber of the refrigerator are obtained; then calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the defrosting cavity and the temperature of the refrigerating chamber; and finally, adjusting the rotating speed of a fan of the refrigerator according to the first temperature difference and the second temperature difference, and adjusting the opening of a radio frequency cooling air door of the refrigerator according to the rotating speed of the fan. In the thawing process, the temperature difference between the exhaust temperature and the intake temperature and the temperature difference between the thawing cavity and the refrigerating chamber are obtained, so that the heat productivity of the radio frequency thawing system can be determined, the working states of the fan and the radio frequency cooling air door can be controlled in time, the heat dissipation of the radio frequency thawing system can be effectively realized, and the normal work of the refrigerator is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;
fig. 2 is a flowchart of a refrigerator control 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 100 includes:
the radio frequency unfreezing system 10 is used for unfreezing the food material to be unfrozen by outputting a radio frequency output signal;
a fan 20 for dissipating heat from the rf thawing system;
a radio frequency cooling damper 30 for controlling a ventilation amount of the refrigerator;
the controller 40 is configured to:
acquiring the exhaust temperature of an exhaust port and the intake temperature of an intake port of a refrigerator, and acquiring the temperature of a thawing cavity in the radio frequency thawing system 10 and the temperature of a refrigerating chamber of the refrigerator;
calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the thawing chamber and the temperature of the refrigerating chamber;
and adjusting the rotating speed of the fan according to the first temperature difference and the second temperature difference, and adjusting the opening of the radio frequency cooling air door according to the rotating speed of the fan.
It is worth to say that the radio frequency thawing system 10 includes a thawing chamber, a signal source output module, a power amplifier and a tuner; the signal source output module outputs a radio frequency output signal with fixed frequency to the food material to be thawed; the power amplifier is used for amplifying the radio frequency output signal, and the tuner is used for detecting a reflected signal reflected by the food material to be unfrozen after receiving the radio frequency output signal.
Specifically, the signal source output module is a source for generating a radio frequency output signal, and is capable of outputting a radio frequency output signal with a fixed frequency, and the radio frequency output signal is amplified step by a power amplifier and then output to a load (i.e., the food material placed in the thawing cavity). The tuner is used for matching the impedance of the load and the power amplifier, and the power is output to the load as much as possible through automatic impedance matching, so that the power reflection in the system is prevented. The tuner comprises a power detection circuit and an impedance matching circuit, can detect a reflected signal reflected by a load end in real time and transmit information to the controller 40, and the controller 40 can adjust the impedance matching circuit and the output frequency according to a detection result, so that stable transmission of radio frequency power is ensured.
Specifically, temperature sensors are installed in both the air inlet and the air outlet of the refrigerator 100, the controller 40 obtains an exhaust temperature of the air outlet and an intake temperature of the air inlet of the refrigerator, calculates a first temperature difference between the exhaust temperature and the intake temperature, adjusts the rotation speed of the fan according to the first temperature difference and the second temperature difference, and adjusts the opening degree of the radio frequency cooling damper according to the rotation speed of the fan. The intake temperature may represent an ambient temperature, and the exhaust temperature may represent an operating temperature of the rf thawing system 10 during a thawing process, and when the exhaust temperature is far greater than the intake temperature, it may indicate that the output power of the rf thawing system 10 is large, and the problem of excessive heat dissipation cannot be solved by natural heat dissipation, and at this time, heat dissipation needs to be performed by means of other devices (such as the fan 20).
Similarly, the controller 40 obtains the temperature of the thawing chamber in the radio frequency thawing system and the temperature of the refrigerating chamber of the refrigerator, calculates a second temperature difference between the temperature of the thawing chamber and the temperature of the refrigerating chamber, adjusts the rotation speed of the fan according to the first temperature difference and the second temperature difference, and adjusts the opening degree of the radio frequency cooling damper according to the rotation speed of the fan. The temperature of the thawing chamber is usually higher than that of the refrigerating chamber, and when the temperature difference between the thawing chamber and the refrigerating chamber is too large, in order to avoid the problem that the temperature of the refrigerating chamber is increased due to the heat of the thawing chamber being transferred to the refrigerating chamber, the heat generated by the radio frequency thawing system needs to be dissipated so as to ensure the normal operation of the refrigerator 100, and meanwhile, the cold air dissipated from the refrigerating chamber in the refrigerating process of the refrigerator refrigerating system 20 can also play a role in cooling, so that the heat of the radio frequency thawing system 10 is reduced.
Optionally, the fan 20 is preset with a rotation speed class, where the rotation speed class includes a first rotation speed, a second rotation speed, and a third rotation speed, the first rotation speed is greater than the second rotation speed, and the second rotation speed is greater than the third rotation speed; then, said adjusting the rotation speed of said fan 20 according to said first temperature difference and said second temperature difference comprises:
when the first temperature difference or the second temperature difference is greater than or equal to a preset high-temperature threshold value, controlling the rotating speed of the fan 20 to be a first rotating speed;
when the first temperature difference or the second temperature difference is smaller than a high temperature threshold and larger than a preset low temperature threshold, controlling the rotating speed of the fan 20 to be a second rotating speed;
and when the first temperature difference or the second temperature difference is smaller than or equal to the low-temperature threshold, controlling the rotating speed of the fan 20 to be a third rotating speed.
For example, the first rotation speed, the second rotation speed, the third rotation speed, the high temperature threshold, and the low temperature threshold may be determined according to a historical heat generation amount of the radio frequency thawing system 10, or may be set by a user, which is not specifically limited in the present invention.
In the embodiment of the present invention, the rotation speed of the fan 20 is controlled by the first temperature difference and the second temperature difference, so that the rotation speed of the fan 20 can be dynamically adjusted according to the heat productivity of the radio frequency thawing system 10, the radio frequency thawing system 10 can be effectively cooled, and the normal operation of the refrigerator is ensured.
Optionally, the radio frequency cooling damper 30 is preset with a damper opening degree grade, where the damper opening degree grade includes a first damper opening degree and a second damper opening degree, and the first damper opening degree is greater than the second damper opening degree; then, the adjusting the opening of the rf cooling damper 30 according to the rotation speed of the fan 20 includes:
when the rotating speed of the fan is a first rotating speed or a second rotating speed, indicating that the fan 20 is in high-speed operation or medium-speed operation, controlling the opening of the radio frequency cooling air door 30 to be the first air door opening;
and when the rotating speed of the fan is a third rotating speed, indicating that the fan 20 is in low-speed operation, and controlling the opening of the radio frequency cooling air door to be the second air door opening.
For example, the high temperature threshold and the low temperature threshold may be determined according to a historical heating value of the radio frequency thawing system 10, or may be set by a user, which is not specifically limited in the present invention. When the fan 20 is at the first rotation speed and the second rotation speed, a larger air discharge amount is required, and the first air door opening degree can be set to 90 degrees at this time; when the fan 20 is at the third rotation speed, a smaller discharge air volume is required, and the second damper opening may be set to 45 °.
In the embodiment of the invention, the opening degree of the radio frequency cooling air door 30 is controlled by acquiring the rotating speed of the fan 20, the opening degree of the air door can be dynamically adjusted according to the rotating speed of the fan 20, the heat dissipation of a radio frequency thawing system can be effectively carried out, and the normal work of a refrigerator is ensured.
Optionally, when the first temperature difference or the second temperature difference is greater than or equal to a preset high temperature threshold, the controller 40 is further configured to:
acquiring a first accumulated number of times that the first temperature difference is greater than or equal to the high temperature threshold;
acquiring a second accumulated number of times that the second temperature difference is greater than or equal to the high temperature threshold;
and when the first accumulated times or the second accumulated times is larger than a preset time threshold value, controlling the radio frequency unfreezing system to stop working.
Specifically, the controller 40 determines whether the first temperature difference or the second temperature difference is greater than or equal to the high-temperature threshold at regular time, and when it is continuously determined that the first temperature difference or the second temperature difference is greater than or equal to the high-temperature threshold for too many times, it indicates that the heat generation amount of the radio frequency thawing system 10 still cannot be reduced after heat dissipation, and at this time, it indicates that the radio frequency thawing system 10 has failed, and the radio frequency thawing system 10 needs to be shut down.
In the embodiment of the present invention, whether the radio frequency thawing system 10 has a fault is determined by determining the number of times that the first temperature difference or the second temperature difference is greater than or equal to the high temperature threshold, so that the health status of the radio frequency thawing system 10 can be monitored in time, and whether the radio frequency thawing system 10 has a fault can be found in time.
Optionally, the controller 40 is further configured to:
and acquiring food material information of the food material to be unfrozen, and controlling the radio frequency unfreezing system to output an initial radio frequency output signal according to the food material information.
Specifically, the food material information includes at least one of a kind, a quality and an initial temperature of the food material to be thawed. The refrigerator 100 is provided with a touch display screen, a user can identify and manage the food materials in the refrigerator through radio frequency identification, video identification, manual input, voice input and the like, when the user takes out the food materials from the freezing area of the refrigerator and puts the food materials into the thawing chamber, the corresponding food material information is updated into the controller 40, and the food material information can be confirmed through tag identification, language input and the like. When the controller 40 obtains the food material information, an initial rf output signal corresponding to the food material information may be extracted by looking up a table in a database according to factors such as the type, quality, and initial temperature state of the food material, so as to control the rf thawing system 10 to output the initial rf output signal.
Compared with the prior art, in the refrigerator 100 disclosed in the embodiment of the invention, the radio frequency output signal is output by the radio frequency unfreezing system 10 to unfreeze the food material to be unfrozen, and in the unfreezing process, the exhaust temperature and the intake temperature of the refrigerator are firstly obtained, and the temperature of the injection unfreezing cavity and the temperature of the refrigerating chamber of the refrigerator are obtained; then calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the defrosting cavity and the temperature of the refrigerating chamber; and finally, adjusting the rotating speed of a fan of the refrigerator according to the first temperature difference and the second temperature difference, and adjusting the opening of a radio frequency cooling air door of the refrigerator according to the rotating speed of the fan. In the thawing process, the temperature difference between the exhaust temperature and the intake temperature and the temperature difference between the thawing cavity and the refrigerating chamber are obtained, so that the heat productivity of the radio frequency thawing system can be determined, the working states of the fan and the radio frequency cooling air door can be controlled in time, the heat dissipation of the radio frequency thawing system can be effectively realized, and the normal work of the refrigerator is ensured.
Referring to fig. 2, fig. 2 is a flowchart of a refrigerator control method according to an embodiment of the present invention, where the refrigerator control method includes:
s1, acquiring the exhaust temperature of an exhaust port and the intake temperature of an intake port of the refrigerator, and acquiring the temperature of a thawing cavity in a radio frequency thawing system of the refrigerator and the temperature of a refrigerating chamber of the refrigerator;
s2, calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the defrosting cavity and the temperature of the refrigerating chamber;
and S3, adjusting the rotating speed of a fan of the refrigerator according to the first temperature difference and the second temperature difference, and adjusting the opening of a radio frequency cooling air door of the refrigerator according to the rotating speed of the fan.
It is worth to be noted that the refrigerator control method according to the embodiment of the present invention is implemented by a controller in the refrigerator, wherein the controller is respectively connected to the radio frequency thawing system, the exhaust port temperature sensor and the air inlet temperature sensor; the radio frequency thawing system is used for thawing food materials to be thawed by outputting a radio frequency output signal, the exhaust port temperature sensor is used for detecting the exhaust temperature of an exhaust port of the refrigerator, and the air inlet temperature sensor is used for detecting the air inlet temperature of an air inlet of the refrigerator. The outlet temperature sensor is installed in an outlet of the refrigerator, and the inlet temperature sensor is installed in an inlet of the refrigerator.
The radio frequency unfreezing system comprises an unfreezing cavity, a signal source output module, a power amplifier and a tuner; the signal source output module outputs a radio frequency output signal with fixed frequency to the food material to be thawed; the power amplifier is used for amplifying the radio frequency output signal, and the tuner is used for detecting a reflected signal reflected by the food material to be unfrozen after receiving the radio frequency output signal.
Specifically, the signal source output module is a source for generating a radio frequency output signal, and is capable of outputting a radio frequency output signal with a fixed frequency, and the radio frequency output signal is amplified step by a power amplifier and then output to a load (i.e., the food material placed in the thawing cavity). The tuner is used for matching the impedance of the load and the power amplifier, and the power is output to the load as much as possible through automatic impedance matching, so that the power reflection in the system is prevented. The tuner comprises a power detection circuit and an impedance matching circuit, can detect a reflected signal reflected by a load end in real time and transmit information to the controller, and the controller can adjust the impedance matching circuit and the output frequency according to a detection result, so that stable transmission of radio frequency power is guaranteed.
Specifically, the controller obtains an exhaust temperature of an exhaust port and an intake temperature of an intake port of the refrigerator, calculates a first temperature difference between the exhaust temperature and the intake temperature, then adjusts the rotation speed of the fan according to the first temperature difference and the second temperature difference, and adjusts the opening degree of the radio frequency cooling damper according to the rotation speed of the fan. The air inlet temperature can represent the ambient temperature, the air outlet temperature can represent the working temperature of the radio frequency unfreezing system in the unfreezing process, when the air outlet temperature is far higher than the air inlet temperature, the output power of the radio frequency unfreezing system is large, the problem that the heat dissipation amount is too large cannot be solved by means of natural heat dissipation, and at the moment, heat dissipation needs to be carried out by means of other equipment (such as a fan).
Similarly, the controller obtains the temperature of a thawing cavity in the radio frequency thawing system and the temperature of a refrigerating chamber of the refrigerator, calculates a second temperature difference between the temperature of the thawing cavity and the temperature of the refrigerating chamber, adjusts the rotating speed of the fan according to the first temperature difference and the second temperature difference, and adjusts the opening degree of the radio frequency cooling air door according to the rotating speed of the fan. The temperature of the unfreezing cavity is usually higher than that of the refrigerating chamber, when the temperature difference between the temperature of the unfreezing cavity and the temperature of the refrigerating chamber is too large, in order to avoid the problem that the temperature of the refrigerating chamber is increased due to the fact that heat of the unfreezing cavity is transferred to the refrigerating chamber, heat generated by the radio frequency unfreezing system needs to be dissipated at the moment, so that normal operation of the refrigerator is guaranteed, meanwhile, cold air emitted from the refrigerating chamber in the refrigerating process of the refrigerator refrigerating system can also play a role in cooling, and the heat productivity of the radio frequency unfreezing system is reduced.
Optionally, the fan is preset with a rotation speed grade, the rotation speed grade comprises a first rotation speed, a second rotation speed and a third rotation speed, the first rotation speed is greater than the second rotation speed, and the second rotation speed is greater than the third rotation speed; then, the adjusting the rotation speed of the fan according to the first temperature difference and the second temperature difference in step S3 includes:
s31, when the first temperature difference or the second temperature difference is larger than or equal to a preset high-temperature threshold value, controlling the rotating speed of the fan to be a first rotating speed;
s32, when the first temperature difference or the second temperature difference is smaller than a high temperature threshold and larger than a preset low temperature threshold, controlling the rotating speed of the fan to be a second rotating speed;
and S33, controlling the rotating speed of the fan to be a third rotating speed when the first temperature difference or the second temperature difference is smaller than or equal to a low-temperature threshold value.
For example, the first rotation speed, the second rotation speed, the third rotation speed, the high temperature threshold, and the low temperature threshold may be determined according to a historical heat generation amount of the radio frequency thawing system, or may be set by a user, which is not specifically limited in the present invention.
In the embodiment of the invention, the rotating speed of the fan is controlled through the first temperature difference and the second temperature difference, the rotating speed of the fan can be dynamically adjusted according to the heat productivity of the radio frequency thawing system, the heat dissipation of the radio frequency thawing system can be effectively carried out, and the normal work of the refrigerator is ensured.
Optionally, the radio frequency cooling air door is preset with an air door opening degree grade, the air door opening degree grade includes a first air door opening degree and a second air door opening degree, and the first air door opening degree is greater than the second air door opening degree; then, in step S3, the adjusting the opening of the rf cooling damper according to the rotation speed of the fan includes:
s34, when the rotating speed of the fan is a first rotating speed or a second rotating speed, indicating that the fan is in high-speed operation or medium-speed operation, and controlling the opening of the radio frequency cooling air door to be the first air door opening;
and S35, when the rotating speed of the fan is a third rotating speed, indicating that the fan is in low-speed operation, and controlling the opening of the radio frequency cooling air door to be the second air door opening.
For example, the high temperature threshold and the low temperature threshold may be determined according to a historical heating value of the radio frequency thawing system, or may be set by a user, which is not specifically limited in the present invention. When the fan is at a first rotating speed and a second rotating speed, a larger air exhaust amount is needed, and the opening degree of the first air door can be set to be 90 degrees; when the fan is at the third rotation speed, a smaller discharge air volume is required, and the second damper opening may be set to 45 °.
In the embodiment of the invention, the opening of the radio frequency cooling air door is controlled by acquiring the rotating speed of the fan, the opening of the air door can be dynamically adjusted according to the rotating speed of the fan, the heat dissipation of a radio frequency thawing system can be effectively carried out, and the normal work of a refrigerator is ensured.
Optionally, in step S31, when the first temperature difference or the second temperature difference is greater than or equal to a preset high temperature threshold, the method further includes:
s311, acquiring a first accumulated number of times that the first temperature difference is greater than or equal to the high-temperature threshold;
s312, acquiring a second accumulated number of times that the second temperature difference is greater than or equal to the high-temperature threshold;
s313, when the first accumulated times or the second accumulated times is larger than a preset time threshold, controlling the radio frequency unfreezing system to stop working.
Specifically, the controller periodically determines whether the first temperature difference or the second temperature difference is greater than or equal to the high-temperature threshold, and when it is continuously determined that the first temperature difference or the second temperature difference is greater than or equal to the high-temperature threshold for too many times, it indicates that the heating value of the radio frequency thawing system still cannot be reduced after heat dissipation, and at this time, it indicates that the radio frequency thawing system has failed, and the radio frequency thawing system needs to be shut down.
In the embodiment of the invention, whether the radio frequency thawing system has a fault is determined by judging the accumulated times that the first temperature difference or the second temperature difference is greater than or equal to the high-temperature threshold, the health state of the radio frequency thawing system can be monitored in time, and whether the radio frequency thawing system has a fault can be found in time.
Optionally, the method further comprises:
s101, obtaining food material information of the food material to be unfrozen, and controlling the radio frequency unfreezing system to output an initial radio frequency output signal according to the food material information.
Specifically, the food material information includes at least one of a kind, a quality and an initial temperature of the food material to be thawed. The refrigerator is provided with the touch display screen, a user can recognize and manage the food materials in the refrigerator through radio frequency recognition, video recognition, manual input, voice input and the like, when the user takes out the food materials from the freezing area of the refrigerator and puts the food materials into the unfreezing cavity, the corresponding food material information is updated into the controller, and the food material information can be confirmed through modes of tag recognition, language input and the like. When the controller acquires the food material information, an initial radio frequency output signal corresponding to the food material information can be extracted by looking up a table in a database according to factors such as the category, the quality, the initial temperature state and the like of food materials, so that the radio frequency thawing system is controlled to output the initial radio frequency output signal.
Compared with the prior art, the refrigerator control method disclosed by the embodiment of the invention has the advantages that the radio frequency output signal is output by the radio frequency unfreezing system to unfreeze the food material to be unfrozen, and in the unfreezing process, the exhaust temperature and the intake temperature of the refrigerator are firstly obtained, and the temperature of the injection unfreezing cavity and the temperature of the refrigerating chamber of the refrigerator are obtained; then calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the defrosting cavity and the temperature of the refrigerating chamber; and finally, adjusting the rotating speed of a fan of the refrigerator according to the first temperature difference and the second temperature difference, and adjusting the opening of a radio frequency cooling air door of the refrigerator according to the rotating speed of the fan. In the thawing process, the temperature difference between the exhaust temperature and the intake temperature and the temperature difference between the thawing cavity and the refrigerating chamber are obtained, so that the heat productivity of the radio frequency thawing system can be determined, the working states of the fan and the radio frequency cooling air door can be controlled in time, the heat dissipation of the radio frequency thawing system can be effectively realized, and the normal work of the refrigerator is ensured.
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:
the radio frequency unfreezing system unfreezes the food material to be unfrozen by outputting a radio frequency output signal;
the fan is used for radiating the heat of the radio frequency unfreezing system;
the radio frequency cooling air door is used for controlling the ventilation quantity of the refrigerator;
the controller is configured to:
acquiring the exhaust temperature of an exhaust port and the intake temperature of an air inlet of a refrigerator, and acquiring the temperature of a thawing cavity in the radio frequency thawing system and the temperature of a refrigerating chamber of the refrigerator;
calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the thawing chamber and the temperature of the refrigerating chamber;
and adjusting the rotating speed of the fan according to the first temperature difference and the second temperature difference, and adjusting the opening of the radio frequency cooling air door according to the rotating speed of the fan.
2. The refrigerator as claimed in claim 1, wherein the fan is previously provided with a rotation speed level including a first rotation speed, a second rotation speed and a third rotation speed, the first rotation speed being greater than the second rotation speed, the second rotation speed being greater than the third rotation speed; then, the adjusting the rotation speed of the fan according to the first temperature difference and the second temperature difference includes:
when the first temperature difference or the second temperature difference is larger than or equal to a preset high-temperature threshold value, controlling the rotating speed of the fan to be a first rotating speed;
when the first temperature difference or the second temperature difference is smaller than a high-temperature threshold and larger than a preset low-temperature threshold, controlling the rotating speed of the fan to be a second rotating speed;
and when the first temperature difference or the second temperature difference is smaller than or equal to a low-temperature threshold value, controlling the rotating speed of the fan to be a third rotating speed.
3. The refrigerator of claim 2 wherein said rf cooling damper is preset with damper opening levels, said damper opening levels including a first damper opening and a second damper opening, said first damper opening being greater than said second damper opening; then, the adjusting the opening of the radio frequency cooling damper according to the rotation speed of the fan includes:
when the rotating speed of the fan is a first rotating speed or a second rotating speed, controlling the opening of the radio frequency cooling air door to be the first air door opening;
and when the rotating speed of the fan is a third rotating speed, controlling the opening of the radio frequency cooling air door to be the opening of the second air door.
4. The refrigerator of claim 2 or 3, wherein when the first temperature difference or the second temperature difference is greater than or equal to a preset high temperature threshold, the controller is further configured to:
acquiring a first accumulated number of times that the first temperature difference is greater than or equal to the high temperature threshold;
acquiring a second accumulated number of times that the second temperature difference is greater than or equal to the high temperature threshold;
and when the first accumulated times or the second accumulated times is larger than a preset time threshold value, controlling the radio frequency unfreezing system to stop working.
5. The refrigerator of claim 1, wherein the controller is further configured to:
and acquiring food material information of the food material to be unfrozen, and controlling the radio frequency unfreezing system to output an initial radio frequency output signal according to the food material information.
6. The refrigerator of claim 5, wherein the food material information comprises at least one of a type, a quality, and an initial temperature of the food material to be thawed.
7. A refrigerator control method, comprising:
acquiring the exhaust temperature of an exhaust port and the intake temperature of an air inlet of a refrigerator, and acquiring the temperature of a thawing cavity in a radio frequency thawing system of the refrigerator and the temperature of a refrigerating chamber of the refrigerator; the radio frequency thawing system is used for thawing food materials to be thawed in the thawing cavity by outputting a radio frequency output signal;
calculating a first temperature difference between the exhaust temperature and the intake temperature, and calculating a second temperature difference between the temperature of the thawing chamber and the temperature of the refrigerating chamber;
and adjusting the rotating speed of a fan of the refrigerator according to the first temperature difference and the second temperature difference, and adjusting the opening of a radio frequency cooling air door of the refrigerator according to the rotating speed of the fan.
8. The method as claimed in claim 7, wherein the fan is previously provided with a rotation speed class including a first rotation speed, a second rotation speed and a third rotation speed, the first rotation speed being greater than the second rotation speed, the second rotation speed being greater than the third rotation speed; then, the adjusting the rotation speed of the fan of the refrigerator according to the first temperature difference and the second temperature difference includes:
when the first temperature difference or the second temperature difference is larger than or equal to a preset high-temperature threshold value, controlling the rotating speed of the fan to be a first rotating speed;
when the first temperature difference or the second temperature difference is smaller than a high-temperature threshold and larger than a preset low-temperature threshold, controlling the rotating speed of the fan to be a second rotating speed;
and when the first temperature difference or the second temperature difference is smaller than or equal to a low-temperature threshold value, controlling the rotating speed of the fan to be a third rotating speed.
9. The method of controlling a refrigerator according to claim 7, wherein said radio frequency cooling damper is preset with a damper opening level, said damper opening level comprising a first damper opening and a second damper opening, said first damper opening being greater than said second damper opening; then, the adjusting the opening of the radio frequency cooling damper of the refrigerator according to the rotation speed of the fan includes:
when the rotating speed of the fan is a first rotating speed or a second rotating speed, controlling the opening of the radio frequency cooling air door to be the first air door opening;
and when the rotating speed of the fan is a third rotating speed, controlling the opening of the radio frequency cooling air door to be the opening of the second air door.
10. The refrigerator control method of claim 8 or 9, wherein when the first temperature difference or the second temperature difference is greater than or equal to a preset high temperature threshold, the method further comprises:
acquiring a first accumulated number of times that the first temperature difference is greater than or equal to the high temperature threshold;
acquiring a second accumulated number of times that the second temperature difference is greater than or equal to the high temperature threshold;
and when the first accumulated times or the second accumulated times is larger than a preset time threshold value, controlling the radio frequency unfreezing system to stop working.
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CN202120285812.0U Active CN214371184U (en) 2020-12-02 2021-02-01 Radio frequency thawing refrigerator
CN202110136637.3A Pending CN113915936A (en) 2020-12-02 2021-02-01 Refrigerator and control method thereof
CN202120286190.3U Active CN214371190U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202120281991.0U Active CN214371180U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202120281912.6U Active CN214620252U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202110135731.7A Active CN113915935B (en) 2020-12-02 2021-02-01 Thawing refrigerator and control method thereof
CN202110135734.0A Pending CN113915860A (en) 2020-12-02 2021-02-01 Refrigerator and control method thereof
CN202120283248.9U Active CN214371182U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202120285896.8U Active CN214665468U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202110139049.5A Active CN113915864B (en) 2020-12-02 2021-02-01 Radio frequency thawing refrigerator
CN202120285846.XU Active CN214665467U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202110139047.6A Pending CN113915862A (en) 2020-12-02 2021-02-01 Radio frequency thawing refrigerator
CN202120285897.2U Active CN215113424U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202120283917.2U Active CN214582001U (en) 2020-12-02 2021-02-01 Radio frequency thawing apparatus and refrigerator
CN202120281911.1U Active CN214892054U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202120286128.4U Active CN214371187U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202110135727.0A Active CN113915859B (en) 2020-12-02 2021-02-01 Refrigerator and control method thereof
CN202110106950.2A Active CN113915858B (en) 2020-12-02 2021-02-01 Radio frequency thawing refrigerator
CN202110106949.XA Active CN113915857B (en) 2020-12-02 2021-02-01 Radio frequency thawing refrigerator
CN202110139046.1A Active CN113915861B (en) 2020-12-02 2021-02-01 Radio frequency thawing refrigerator
CN202120286186.7U Active CN214371189U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202120285814.XU Active CN214371186U (en) 2020-12-02 2021-02-01 Radio frequency thawing refrigerator
CN202120285840.2U Active CN215063114U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202120285862.9U Active CN216522584U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202120283919.1U Active CN214371183U (en) 2020-12-02 2021-02-01 Radio frequency power supply impedance matching system and unfreezing refrigerator
CN202110136614.2A Pending CN113915823A (en) 2020-12-02 2021-02-01 Thawing refrigerator and control method thereof
CN202120283247.4U Active CN214371181U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202120286137.3U Active CN214371188U (en) 2020-12-02 2021-02-01 Refrigeration storage device
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CN202120281916.4U Active CN214665466U (en) 2020-12-02 2021-02-01 A kind of refrigerator
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CN202120286190.3U Active CN214371190U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202120281991.0U Active CN214371180U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202120281912.6U Active CN214620252U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202110135731.7A Active CN113915935B (en) 2020-12-02 2021-02-01 Thawing refrigerator and control method thereof
CN202110135734.0A Pending CN113915860A (en) 2020-12-02 2021-02-01 Refrigerator and control method thereof
CN202120283248.9U Active CN214371182U (en) 2020-12-02 2021-02-01 Refrigeration storage device
CN202120285896.8U Active CN214665468U (en) 2020-12-02 2021-02-01 A kind of refrigerator
CN202110139049.5A Active CN113915864B (en) 2020-12-02 2021-02-01 Radio frequency thawing refrigerator
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