CN113915937B - Refrigerator and control method thereof - Google Patents

Refrigerator and control method thereof Download PDF

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Publication number
CN113915937B
CN113915937B CN202110136665.5A CN202110136665A CN113915937B CN 113915937 B CN113915937 B CN 113915937B CN 202110136665 A CN202110136665 A CN 202110136665A CN 113915937 B CN113915937 B CN 113915937B
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radio frequency
heat dissipation
thawing system
threshold
output signal
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CN113915937A (en
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赵强
段跃斌
李秀军
侯同尧
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Hisense Refrigerator Co Ltd
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Hisense 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 thawing system thaws food materials to be thawed by outputting radio frequency output signals; an exhaust port temperature sensor for detecting an exhaust temperature of an exhaust port of the refrigerator; an air inlet temperature sensor for detecting an air inlet temperature of an air inlet of the refrigerator; the controller is configured to: calculating the heat dissipation capacity of the radio frequency thawing system when the radio frequency thawing system works according to the exhaust temperature and the intake temperature; and controlling the radio frequency thawing system to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold. The invention also discloses a refrigerator control method. By adopting the embodiment of the invention, the working state of the radio frequency thawing system can be effectively controlled according to the heat dissipation capacity of the radio frequency thawing system, and the influence on the normal operation of the refrigerator caused by overlarge heat dissipation capacity is avoided.

Description

Refrigerator and control method thereof
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a control method thereof.
Background
In recent years, with the rapid development of eating habits and life rhythms, the market demand of frozen foods for rapid thawing is found to be stronger in the investigation of consumer demand in the household electrical industry, and refrigerators are used as direct media for food storage and freezing, and are endowed with the desire of thawing functions by consumers. The radio frequency thawing system can accelerate thawing speed, but in practical application, after the radio frequency thawing begins to work, the heat dissipation of the radio frequency module needs to be balanced by means of a heat dissipation system in the refrigerator, so that the problems are that: because the efficiency of the work of the radio frequency module is limited at present, the heat dissipation capacity of the radio frequency tuning module is large, and the heat dissipation in the refrigerator can seriously influence the normal work of the refrigerator.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a control method thereof, which can effectively control the working state of a radio frequency thawing system according to the heat dissipation capacity of the radio frequency thawing system and avoid influencing the normal operation of the refrigerator due to overlarge heat dissipation capacity.
To achieve the above object, an embodiment of the present invention provides a refrigerator including:
the radio frequency thawing system thaws food materials to be thawed by outputting radio frequency output signals;
an exhaust port temperature sensor for detecting an exhaust temperature of an exhaust port of the refrigerator;
an air inlet temperature sensor for detecting an air inlet temperature of an air inlet of the refrigerator;
the controller is configured to:
calculating the heat dissipation capacity of the radio frequency thawing system when the radio frequency thawing system works according to the exhaust temperature and the intake temperature;
and controlling the radio frequency thawing system to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold.
As an improvement of the above solution, the heat dissipation threshold includes a first heat dissipation threshold and a second heat dissipation threshold, the first heat dissipation threshold being smaller than the second heat dissipation threshold; and controlling the radio frequency thawing system to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold value, wherein the method comprises the following steps:
when the heat dissipation capacity is smaller than or equal to the first heat dissipation threshold value, controlling the radio frequency thawing system to stop working;
when the heat dissipation capacity is larger than the first heat dissipation threshold and smaller than the second heat dissipation threshold, the radio frequency thawing system is controlled to dynamically adjust radio frequency output signals according to a preset radio frequency output signal adjustment strategy;
and when the heat dissipation capacity is larger than or equal to the second heat dissipation threshold, controlling the radio frequency thawing system to reduce the radio frequency output signal to a preset radio frequency output signal threshold.
As an improvement of the above solution, the calculating the heat dissipation capacity of the rf thawing system during operation according to the exhaust temperature and the intake temperature includes:
calculating a temperature difference between the exhaust temperature and the intake temperature;
and carrying out integral calculation on the temperature difference to obtain the heat dissipation capacity of the radio frequency thawing system during working.
As an improvement of the above solution, the rf output signal adjustment strategy satisfies the following formula:
Pt＝k*(Pr-Q)；
wherein Pt represents an adjusted radio frequency output signal, pr represents a radio frequency output signal currently output by the radio frequency thawing system, k is a preset coefficient, and Q is the heat dissipation capacity.
As an improvement of the above, when the heat dissipation capacity is greater than or equal to the second heat dissipation threshold, the controller is further configured to:
acquiring accumulated times when the heat dissipation capacity is greater than or equal to the second heat dissipation threshold;
and when the accumulated times are larger than a preset times threshold, controlling the radio frequency thawing 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 thawed, and controlling the radio frequency thawing system to output an initial radio frequency output signal according to the food material information.
As an improvement of the above-described aspect, 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 method for controlling a refrigerator, including:
acquiring the exhaust temperature of an exhaust port and the intake temperature of an air inlet of the refrigerator;
calculating the heat dissipation capacity of a radio frequency thawing system of the refrigerator when the radio frequency thawing system works according to the exhaust temperature and the intake temperature; the radio frequency thawing system thaws food materials to be thawed by outputting radio frequency output signals;
and controlling the radio frequency thawing system to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold.
As an improvement of the above solution, the heat dissipation threshold includes a first heat dissipation threshold and a second heat dissipation threshold, the first heat dissipation threshold being smaller than the second heat dissipation threshold; and controlling the radio frequency thawing system to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold value, wherein the method comprises the following steps:
when the heat dissipation capacity is smaller than or equal to the first heat dissipation threshold value, controlling the radio frequency thawing system to stop working;
when the heat dissipation capacity is larger than the first heat dissipation threshold and smaller than the second heat dissipation threshold, the radio frequency thawing system is controlled to dynamically adjust radio frequency output signals according to a preset radio frequency output signal adjustment strategy;
and when the heat dissipation capacity is larger than or equal to the second heat dissipation threshold, controlling the radio frequency thawing system to reduce the radio frequency output signal to a preset radio frequency output signal threshold.
As an improvement of the above solution, the calculating the heat dissipation capacity of the radio frequency thawing system of the refrigerator during operation according to the exhaust temperature and the intake temperature includes:
calculating a temperature difference between the exhaust temperature and the intake temperature;
and carrying out integral calculation on the temperature difference to obtain the heat dissipation capacity of the radio frequency thawing system during working.
Compared with the prior art, the refrigerator and the control method thereof in the embodiment of the invention output radio frequency output signals through the radio frequency thawing system to thaw food, acquire exhaust temperature and intake temperature in the thawing process, calculate the heat dissipation capacity of the radio frequency thawing system when in operation according to the exhaust temperature and the intake temperature, and control the radio frequency thawing system to adjust the radio frequency output signals according to the heat dissipation capacity and a preset heat dissipation threshold. In the thawing process, the radio frequency output signal of the radio frequency thawing system is adjusted in real time by calculating the heat dissipation capacity of the radio frequency thawing system, so that the working state of the radio frequency thawing system can be effectively controlled according to the heat dissipation capacity of the radio frequency thawing system, and the influence on the normal operation of the refrigerator due to overlarge heat dissipation capacity is avoided.
Drawings
Fig. 1 is a schematic view of a refrigerator according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of a refrigerator according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a refrigerator 100 according to an embodiment of the present invention, where the refrigerator 100 includes:
the radio frequency thawing system 10 thaws food materials to be thawed by outputting radio frequency output signals;
an exhaust port temperature sensor 20 for detecting an exhaust temperature of an exhaust port of the refrigerator;
an intake port temperature sensor 30 for detecting an intake air temperature of an intake port of the refrigerator;
the controller 40 is configured to:
calculating the heat dissipation capacity of the radio frequency thawing system 10 during operation according to the exhaust temperature and the intake temperature;
and controlling the radio frequency thawing system 10 to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold.
Illustratively, the rf 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 of the food material to be thawed, which is reflected back after the radio frequency output signal is received.
Specifically, the signal source output module is a source for generating a radio frequency output signal, and can output the radio frequency output signal with a fixed frequency, and the radio frequency output signal is amplified step by a power amplifier and then is output to a load (namely, food materials 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, so that reflected signals reflected by a load end can be detected in real time, information is transmitted to the controller 40, and the controller 40 can adjust the impedance matching circuit and the output frequency according to detection results, so that stable transmission of radio frequency power is ensured.
Specifically, the outlet temperature sensor 20 is installed in the outlet of the refrigerator 100, and the inlet temperature sensor 30 is installed in the inlet of the refrigerator 100.
Specifically, the controller 40 first calculates a temperature difference between the exhaust temperature and the intake temperature, and then integrates the temperature difference to obtain a heat dissipation amount of the rf thawing system 10 during operation, wherein the heat dissipation amount satisfies the following formula:
Figure BDA0002927216730000051
wherein Q is the heat dissipation capacity; c is a coefficient, which can be preset; Δt is an absolute value of a temperature difference between the intake air temperature and the exhaust gas temperature; t0 is any time; t is a cycle time, and represents integrating the heat dissipation amount over one cycle time.
Specifically, the heat dissipation threshold includes a first heat dissipation threshold Qmin and a second heat dissipation threshold Qmax, where the first heat dissipation threshold is smaller than the second heat dissipation threshold, that is, satisfies: qmin < Qmax; then, the controlling the rf thawing system 10 to adjust the rf output signal according to the heat dissipation capacity and the preset heat dissipation threshold includes:
when the heat dissipation capacity is smaller than or equal to the first heat dissipation threshold, namely, the following conditions are satisfied: q is less than or equal to Qmin, and the radio frequency thawing system 10 is controlled to stop working; at this point, a malfunction of the rf thawing system 10 is indicated;
when the heat dissipation capacity is greater than the first heat dissipation threshold and less than the second heat dissipation threshold, namely: qmin < Q < Qmax, and controlling the rf thawing system 10 to dynamically adjust the rf output signal thereof according to a preset rf output signal adjustment strategy;
when the heat dissipation capacity is greater than or equal to the second heat dissipation threshold, namely, the following is satisfied: q is larger than or equal to Qmax, and the radio frequency thawing system 10 is controlled to reduce the radio frequency output signal to a preset radio frequency output signal threshold value.
For example, the rf output signal threshold may be preset according to the historical operating state of the rf thawing system 10, which is not particularly limited in the present invention. The radio frequency output signal adjustment strategy satisfies the following formula:
Pt＝k*(Pr-Q)；
wherein Pt represents the adjusted rf output signal, pr represents the rf output signal currently output by the rf thawing system 10, k is a preset coefficient, and Q is the heat dissipation capacity.
In the embodiment of the present invention, the working condition of the rf thawing system 10 is determined according to the heat dissipation capacity of the rf thawing system 10, so that the output power of the rf thawing system 10 can be reflected in real time, and further the heat dissipation capacity of the rf thawing system 10 is reduced by adjusting the output rf output signal, so that the influence on the normal operation of the refrigerator due to the excessive heat dissipation capacity is avoided.
Further, when the heat dissipation amount is greater than or equal to the second heat dissipation threshold, the controller 40 is further configured to:
acquiring accumulated times when the heat dissipation capacity is greater than or equal to the second heat dissipation threshold;
and when the accumulated times are larger than a preset times threshold, controlling the radio frequency thawing system 10 to stop working.
Specifically, the controller 40 determines whether the heat dissipation capacity is greater than or equal to the second heat dissipation threshold at regular time, and when it is continuously determined that the heat dissipation capacity is greater than or equal to the second heat dissipation threshold for too many times, it indicates that the heat dissipation capacity of the rf thawing system 10 cannot be reduced after the rf output signal outputted by the rf thawing system 10 is reduced, and at this time, it indicates that the rf thawing system 10 has failed, and the rf thawing system 10 needs to be turned off.
In the embodiment of the present invention, whether the radio frequency thawing system 10 fails or not is determined by determining the cumulative number of times that the heat dissipation capacity is greater than or equal to the second heat dissipation 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 fails or not can be found in time.
Further, the controller 40 is further configured to:
and acquiring food material information of the food material to be thawed, and controlling the radio frequency thawing system 10 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 food materials of the refrigerator through radio frequency identification, video identification, manual input, voice input and the like, and when the user takes food materials out of a freezing area of the refrigerator and puts the food materials into a thawing cavity, corresponding food material information is updated into the controller 40, and food material information confirmation can be performed through modes of 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 a type, a quality, an initial temperature state, etc. 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, the refrigerator 100 according to the embodiment of the invention thaws food to be thawed by outputting a radio frequency output signal through the radio frequency thawing system 10, obtains an exhaust temperature and an intake temperature during thawing, and calculates the heat dissipation capacity of the radio frequency thawing system 10 during operation according to the exhaust temperature and the intake temperature, so as to control the radio frequency thawing system 10 to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold. In the thawing process, the radio frequency output signal of the radio frequency thawing system 10 is adjusted in real time by calculating the heat dissipation capacity of the radio frequency thawing system 10, so that the working state of the radio frequency thawing system 10 can be effectively controlled according to the heat dissipation capacity of the radio frequency thawing system 10, and the influence on the normal operation of the refrigerator due to overlarge heat dissipation capacity is avoided.
Referring to fig. 2, fig. 2 is a flowchart of a refrigerator control method according to an embodiment of the present invention, the refrigerator control method includes:
s1, acquiring the exhaust temperature of an exhaust port and the intake temperature of an air inlet of a refrigerator;
s2, calculating the heat dissipation capacity of a radio frequency thawing system of the refrigerator during operation according to the exhaust temperature and the intake temperature; the radio frequency thawing system thaws food materials to be thawed by outputting radio frequency output signals;
and S3, controlling the radio frequency thawing system to adjust radio frequency output signals according to the heat dissipation capacity and a preset heat dissipation threshold.
It is worth to be noted that, the refrigerator control method according to the embodiment of the present invention is implemented by executing a controller in the refrigerator, where 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 thaws food materials to be thawed by outputting radio frequency output signals, 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 exhaust port temperature sensor is installed in an exhaust port of the refrigerator, and the intake port temperature sensor is installed in an intake port of the refrigerator.
The radio frequency thawing system comprises a thawing 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 of the food material to be thawed, which is reflected back after the radio frequency output signal is received.
Specifically, the signal source output module is a source for generating a radio frequency output signal, and can output the radio frequency output signal with a fixed frequency, and the radio frequency output signal is amplified step by a power amplifier and then is output to a load (namely, food materials 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 reflected signals reflected by a load end in real time, and transmits information to the controller, and the controller can adjust the impedance matching circuit and the output frequency according to detection results, so that stable transmission of radio frequency power is ensured.
Specifically, step S2 specifically includes:
s21, calculating a temperature difference between the exhaust temperature and the intake temperature;
s22, carrying out integral calculation on the temperature difference to obtain the heat dissipation capacity of the radio frequency thawing system during working; wherein the heat dissipation capacity satisfies the following formula:
Figure BDA0002927216730000091
wherein Q is the heat dissipation capacity; c is a coefficient, which can be preset; Δt is an absolute value of a temperature difference between the intake air temperature and the exhaust gas temperature; t0 is any time; t is a cycle time, and represents integrating the heat dissipation amount over one cycle time.
Specifically, the heat dissipation threshold includes a first heat dissipation threshold Qmin and a second heat dissipation threshold Qmax, where the first heat dissipation threshold is smaller than the second heat dissipation threshold, that is, satisfies: qmin < Qmax; then, step S3 specifically includes:
s31, when the heat dissipation capacity is smaller than or equal to the first heat dissipation threshold, namely, the following conditions are satisfied: q is less than or equal to Qmin, and the radio frequency thawing system is controlled to stop working; at this time, the radio frequency thawing system is indicated to be faulty;
s32, when the heat dissipation capacity is greater than the first heat dissipation threshold and less than the second heat dissipation threshold, namely: qmin < Q < Qmax, and the radio frequency thawing system is controlled to dynamically adjust the radio frequency output signal according to a preset radio frequency output signal adjustment strategy;
s33, when the heat dissipation capacity is greater than or equal to the second heat dissipation threshold, namely, the following conditions are satisfied: q is more than or equal to Qmax, and the radio frequency thawing system is controlled to reduce the radio frequency output signal to a preset radio frequency output signal threshold value.
The rf output signal threshold may be preset according to a historical operating state of the rf thawing system, which is not particularly limited in the present invention. The radio frequency output signal adjustment strategy satisfies the following formula:
Pt＝k*(Pr-Q)；
wherein Pt represents an adjusted radio frequency output signal, pr represents a radio frequency output signal currently output by the radio frequency thawing system, k is a preset coefficient, and Q is the heat dissipation capacity.
In the embodiment of the invention, the working condition of the radio frequency thawing system is determined according to the heat dissipation capacity of the radio frequency thawing system, so that the output power of the radio frequency thawing system can be reflected in real time, and the heat dissipation capacity of the radio frequency thawing system is reduced by adjusting the output radio frequency output signal, thereby avoiding influencing the normal operation of the refrigerator due to overlarge heat dissipation capacity.
Further, when the heat dissipation capacity is greater than or equal to the second heat dissipation threshold, the method further includes the steps of:
s34, acquiring accumulated times of the heat dissipation capacity being larger than or equal to the second heat dissipation threshold value;
and S35, when the accumulated times are larger than a preset times threshold, controlling the radio frequency thawing system to stop working.
Specifically, the controller determines at regular time whether the heat dissipation capacity is greater than or equal to the second heat dissipation threshold, and when it is continuously determined that the heat dissipation capacity is greater than or equal to the second heat dissipation threshold for too many times, the controller indicates that the heat dissipation capacity of the radio frequency thawing system still cannot be reduced after reducing the radio frequency output signal output by the radio frequency thawing system, and at this time, indicates that the radio frequency thawing system has failed and needs to be turned off.
In the embodiment of the invention, whether the radio frequency thawing system fails or not is determined by judging the accumulated times that the heat dissipation capacity is larger than or equal to the second heat dissipation threshold value, so that the health state of the radio frequency thawing system can be monitored in time, and whether the radio frequency thawing system fails or not can be found in time.
Further, the method further comprises:
s4, acquiring food material information of the food material to be thawed, and controlling the radio frequency thawing 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 a touch display screen, a user can recognize and manage food materials of the refrigerator through radio frequency recognition, video recognition, manual input, voice input and the like, and when the user takes food materials out of a freezing area of the refrigerator and puts the food materials into a thawing cavity, corresponding food material information is updated into the controller, and food material information confirmation can be carried out 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 in a database in a table look-up mode according to factors such as the type, quality and initial temperature state of the food material, 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 provided by the embodiment of the invention has the advantages that the radio frequency output signal is output by the radio frequency thawing system to thaw food, in the thawing process, the exhaust temperature and the air inlet temperature are obtained, and the heat dissipation capacity of the radio frequency thawing system in working is calculated according to the exhaust temperature and the air inlet temperature, so that the radio frequency thawing system is controlled to adjust the radio frequency output signal according to the heat dissipation capacity and the preset heat dissipation threshold value. In the thawing process, the radio frequency output signal of the radio frequency thawing system is adjusted in real time by calculating the heat dissipation capacity of the radio frequency thawing system, so that the working state of the radio frequency thawing system can be effectively controlled according to the heat dissipation capacity of the radio frequency thawing system, and the influence on the normal operation of the refrigerator due to overlarge heat dissipation capacity is avoided.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (6)

1. A refrigerator, comprising:
the radio frequency thawing system thaws food materials to be thawed by outputting radio frequency output signals;
an exhaust port temperature sensor for detecting an exhaust temperature of an exhaust port of the refrigerator;
an air inlet temperature sensor for detecting an air inlet temperature of an air inlet of the refrigerator;
the controller is configured to:
calculating the heat dissipation capacity of the radio frequency thawing system when the radio frequency thawing system works according to the exhaust temperature and the intake temperature;
controlling the radio frequency thawing system to adjust a radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold;
the method for calculating the heat dissipation capacity of the radio frequency thawing system during working according to the exhaust temperature and the intake temperature comprises the following steps: calculating a temperature difference between the exhaust temperature and the intake temperature; integrating and calculating the temperature difference to obtain the heat dissipation capacity of the radio frequency thawing system during working;
the heat dissipation threshold comprises a first heat dissipation threshold and a second heat dissipation threshold, and the first heat dissipation threshold is smaller than the second heat dissipation threshold; and controlling the radio frequency thawing system to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold value, wherein the method comprises the following steps:
when the heat dissipation capacity is smaller than or equal to the first heat dissipation threshold value, controlling the radio frequency thawing system to stop working;
when the heat dissipation capacity is larger than the first heat dissipation threshold and smaller than the second heat dissipation threshold, the radio frequency thawing system is controlled to dynamically adjust radio frequency output signals according to a preset radio frequency output signal adjustment strategy;
and when the heat dissipation capacity is larger than or equal to the second heat dissipation threshold, controlling the radio frequency thawing system to reduce the radio frequency output signal to a preset radio frequency output signal threshold.
2. The refrigerator of claim 1, wherein the radio frequency output signal adjustment strategy satisfies the following formula:
Pt＝k*(Pr-Q)；
wherein Pt represents an adjusted radio frequency output signal, pr represents a radio frequency output signal currently output by the radio frequency thawing system, k is a preset coefficient, and Q is the heat dissipation capacity.
3. The refrigerator of claim 1, wherein when the heat dissipation capacity is greater than or equal to the second heat dissipation threshold, the controller is further configured to:
acquiring accumulated times when the heat dissipation capacity is greater than or equal to the second heat dissipation threshold;
and when the accumulated times are larger than a preset times threshold, controlling the radio frequency thawing system to stop working.
4. The refrigerator of claim 1, wherein the controller is further configured to:
and acquiring food material information of the food material to be thawed, and controlling the radio frequency thawing system to output an initial radio frequency output signal according to the food material information.
5. The refrigerator of claim 4, wherein the food material information includes at least one of a kind, a quality, and an initial temperature of the food material to be thawed.
6. A refrigerator control method, comprising:
acquiring the exhaust temperature of an exhaust port and the intake temperature of an air inlet of the refrigerator;
calculating the heat dissipation capacity of a radio frequency thawing system of the refrigerator when the radio frequency thawing system works according to the exhaust temperature and the intake temperature; the radio frequency thawing system thaws food materials to be thawed by outputting radio frequency output signals;
controlling the radio frequency thawing system to adjust a radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold;
the method for calculating the heat dissipation capacity of the radio frequency thawing system during working according to the exhaust temperature and the intake temperature comprises the following steps: calculating a temperature difference between the exhaust temperature and the intake temperature; integrating and calculating the temperature difference to obtain the heat dissipation capacity of the radio frequency thawing system during working;
the heat dissipation threshold comprises a first heat dissipation threshold and a second heat dissipation threshold, and the first heat dissipation threshold is smaller than the second heat dissipation threshold; and controlling the radio frequency thawing system to adjust the radio frequency output signal according to the heat dissipation capacity and a preset heat dissipation threshold value, wherein the method comprises the following steps:
when the heat dissipation capacity is smaller than or equal to the first heat dissipation threshold value, controlling the radio frequency thawing system to stop working;
when the heat dissipation capacity is larger than the first heat dissipation threshold and smaller than the second heat dissipation threshold, the radio frequency thawing system is controlled to dynamically adjust radio frequency output signals according to a preset radio frequency output signal adjustment strategy;
and when the heat dissipation capacity is larger than or equal to the second heat dissipation threshold, controlling the radio frequency thawing system to reduce the radio frequency output signal to a preset radio frequency output signal threshold.
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CN202120285812.0U Active CN214371184U (en) 2020-12-02 2021-02-01 Radio frequency thawing 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
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
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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
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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
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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
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CN109619373A (en) * 2017-10-09 2019-04-16 青岛海尔智能技术研发有限公司 Ultrasonic wave unfreezing control method and refrigerator
CN208487861U (en) * 2018-07-20 2019-02-12 汕头市金山厨房酒店用品有限公司 A kind of freezing food materials efficiently thaw cabinet
CN110513954A (en) * 2019-08-14 2019-11-29 长虹美菱股份有限公司 A kind of refrigerator and control method with quick-thawing function

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