CN114518001A - Refrigerator and unfreezing control method thereof - Google Patents
Refrigerator and unfreezing control method thereof Download PDFInfo
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- CN114518001A CN114518001A CN202210142483.3A CN202210142483A CN114518001A CN 114518001 A CN114518001 A CN 114518001A CN 202210142483 A CN202210142483 A CN 202210142483A CN 114518001 A CN114518001 A CN 114518001A
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000010257 thawing Methods 0.000 claims abstract description 365
- 235000013305 food Nutrition 0.000 claims abstract description 167
- 238000001514 detection method Methods 0.000 claims abstract description 31
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- 238000005057 refrigeration Methods 0.000 description 6
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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
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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
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- 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
- F25D2600/02—Timing
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a refrigerator and a defrosting control method of the refrigerator. The refrigerator includes: the thawing chamber is used for storing food to be thawed; and the detection range of the distance sensor faces to the bottom of the thawing chamber and is used for detecting the distance between the distance sensor and the object. When the unfreezing chamber is in the unfreezing mode, calculating the thickness of the food to be unfrozen according to the distance detected by the distance sensor; according to the thickness, determining the unfreezing condition of the food to be unfrozen; the thawing conditions comprise thawing temperature and thawing time; and controlling the operating parameters of the thawing chamber according to the thawing conditions. By adopting the method and the device, the thickness of the food to be thawed can be effectively detected, so that the most appropriate thawing condition is intelligently selected according to the thickness, and the food thawing control process is optimized.
Description
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a refrigerator and a defrosting control method of the refrigerator.
Background
With the rapid development of the technical field of refrigerators, the functions of the existing refrigerators are more and more, and the refrigerators capable of unfreezing food are developed on the market and widely applied. The current unfreezing technology adopts a heat source temperature rising mode, such as a heating unfreezing method adopting technologies of air, radio frequency, ultrasonic wave, ohmic resistance and the like.
In the thawing control process of the refrigerator, the related art generally judges the thawing time of the food by detecting the temperature of the surface of the food or the weight of the food. However, the inventors found that the prior art has at least the following problems: the thawing state of different foods cannot be well measured only by the surface temperature or the weight of the foods, the thawing time is difficult to accurately judge, and the thawing control of the foods is difficult to well realize.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a defrosting control method of the refrigerator, which can effectively detect the thickness of food to be defrosted, so that the most appropriate defrosting condition is intelligently selected according to the thickness, and the defrosting control process of the food is optimized.
To achieve the above object, an embodiment of the present invention provides a refrigerator, including:
the thawing chamber is used for storing food to be thawed;
the detection range of the distance sensor faces to the bottom of the unfreezing chamber and is used for detecting the distance between the distance sensor and the object;
a controller to:
when the unfreezing chamber is in the unfreezing mode, calculating the thickness of the food to be unfrozen according to the distance detected by the distance sensor;
according to the thickness, determining the unfreezing condition of the food to be unfrozen; the thawing conditions comprise thawing temperature and thawing time;
And controlling the operating parameters of the thawing chamber according to the thawing conditions.
As a modification of the above, the distance sensor is located at the middle of the upper edge of the rear surface of the thawing chamber, and the edge of the maximum detection range of the distance sensor is tangent to the boundary line of the front surface and the lower surface of the thawing chamber.
As an improvement of the above scheme, the calculating the thickness of the food to be thawed according to the distance detected by the distance sensor specifically includes:
when the thawing chamber is empty, acquiring the distance detected by the distance sensor as a first distance;
when the food to be defrosted is stored in the unfreezing chamber, the distance detected by the distance sensor is acquired as a second distance;
calculating the thickness of the food to be thawed according to the first distance, the second distance and the height of the rear surface of the thawing chamber by the following calculation formula:
wherein y is the thickness of the food to be thawed, a is the first distance, and x is the second distance. b is the height of the rear surface of the thawing chamber.
As an improvement of the above scheme, the determining the thawing condition of the food to be thawed according to the thickness specifically includes:
Determining a thawing temperature corresponding to the thickness of the food to be thawed as a target thawing temperature according to a preset corresponding relation between the thickness and the thawing temperature;
determining the thawing time corresponding to the thickness of the food to be thawed at the target thawing temperature as the target thawing time according to the corresponding relation among the preset thawing temperature, thickness and thawing time;
and obtaining the unfreezing condition of the food to be unfrozen according to the target unfreezing temperature and the target unfreezing time.
As an improvement of the above scheme, the preset correspondence between the thickness and the thawing temperature specifically includes:
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset first thawing temperature, the corresponding thawing temperature is the preset first thawing temperature;
when the said is waitingThickness of the defrosted food material satisfies
When the temperature is higher than the preset second thawing temperature, the corresponding thawing temperature is the preset second thawing temperature; wherein the first thawing temperature is less than the second thawing temperature.
As an improvement of the above, the controller is further configured to:
when the thawing chamber is detected to start entering the thawing mode, after the target thawing time, controlling the thawing chamber to exit the thawing mode;
after the thawing chamber is controlled to exit the thawing mode, acquiring a preset storage temperature, and controlling the operating parameters of the thawing chamber according to the preset storage temperature; wherein the preset storage temperature is less than the first thawing temperature.
As an improvement of the above scheme, the distance sensor is a laser sensor or an ultrasonic sensor;
the lower surface of the thawing chamber is provided with an opaque material, and the opaque material comprises at least one of a black coating, a black plastic film and a black metal tray.
The embodiment of the invention provides a defrosting control method of a refrigerator, wherein the refrigerator comprises the following steps:
the thawing chamber is used for storing food to be thawed;
the detection range of the distance sensor faces to the bottom of the unfreezing chamber and is used for detecting the distance between the distance sensor and the object;
the method comprises the following steps:
when the unfreezing chamber is in the unfreezing mode, calculating the thickness of the food to be unfrozen according to the distance detected by the distance sensor;
according to the thickness, determining the unfreezing condition of the food to be unfrozen; the thawing conditions comprise thawing temperature and thawing time;
and controlling the operating parameters of the thawing chamber according to the thawing conditions.
As a modification of the above, the distance sensor is located at the middle of the upper edge of the rear surface of the thawing chamber, and the edge of the maximum detection range of the distance sensor is tangent to the boundary line of the front surface and the lower surface of the thawing chamber; the distance sensor is a laser sensor or an ultrasonic sensor; the lower surface of the thawing chamber is provided with an opaque material, and the opaque material comprises at least one of a black coating, a black plastic film and a black metal tray.
As an improvement of the above scheme, the calculating the thickness of the food to be thawed according to the distance detected by the distance sensor specifically includes:
when the thawing chamber is empty, acquiring the distance detected by the distance sensor as a first distance;
when the food to be defrosted is stored in the defrosting chamber, the distance detected by the distance sensor is acquired as a second distance;
calculating the thickness of the food to be thawed by the following calculation formula according to the first distance, the second distance and the height of the rear surface of the thawing chamber:
wherein y is the thickness of the food to be thawed, a is the first distance, and x is the second distance. b is the height of the rear surface of the thawing chamber;
then, the determining the thawing condition of the food to be thawed according to the thickness specifically includes:
determining the thawing temperature corresponding to the thickness of the food to be thawed as a target thawing temperature according to the preset corresponding relation between the thickness and the thawing temperature;
determining the thawing time corresponding to the thickness of the food to be thawed at the target thawing temperature according to the corresponding relation among the preset thawing temperature, the preset thickness and the preset thawing time, and taking the thawing time as the target thawing time;
Obtaining the unfreezing condition of the food to be unfrozen according to the target unfreezing temperature and the target unfreezing time;
wherein, the corresponding relation of predetermined thickness and thawing temperature specifically includes:
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset first thawing temperature, the corresponding thawing temperature is the preset first thawing temperature;
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset second thawing temperature, the corresponding thawing temperature is the preset second thawing temperature; wherein the first thawing temperature is less than the second thawing temperature.
Compared with the prior art, the refrigerator and the unfreezing control method of the refrigerator disclosed by the embodiment of the invention comprise the unfreezing chamber and the distance sensor; the detection range of the distance sensor faces to the bottom of the unfreezing chamber and is used for detecting the distance between the distance sensor and the object. After the unfreezing chamber is in the unfreezing mode, a controller of the refrigerator calculates the thickness of the food to be unfrozen according to the distance detected by the distance sensor; according to the thickness, determining the unfreezing condition of the food to be unfrozen; the thawing conditions comprise thawing temperature and thawing time; and controlling the operating parameters of the thawing chamber according to the thawing conditions. By adopting the technical means of the embodiment of the invention, as the key factor for determining the unfreezing time of the food is the thickness of the food, the thicker the food is, the larger the temperature difference between the surface and the center in the unfreezing process is, and the longer the unfreezing time is. Therefore, the embodiment of the invention obtains the thickness of the food material to be thawed through the calculation of the set algorithm by arranging the distance sensor, so that the appropriate thawing condition is intelligently matched according to the thickness of the food material to be thawed, the problem of poor thawing efficiency and poor thawing effect caused by the fact that the thawing control of the food is realized by detecting the surface temperature or weight of the food in the prior art is solved, and the food thawing control process is effectively optimized. In addition, the embodiment of the invention does not need to adopt more sensor components, thereby effectively saving the manufacturing cost of the refrigerator and effectively improving the use experience of users.
Drawings
Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention in a preferred embodiment;
FIG. 2 is a flow chart illustrating the operation of the controller in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the installation structure of a distance sensor in a preferred embodiment in the embodiment of the invention;
FIG. 4 is a schematic view of the installation structure of the distance sensor in a preferred embodiment in the embodiment of the invention;
FIG. 5 is a schematic diagram illustrating the detection principle of the distance sensor in a preferred embodiment according to the embodiment of the present invention;
FIG. 6 is a schematic flow chart of a preferred embodiment of the present invention for calculating the thickness of a food item;
FIG. 7 is a schematic flow chart of a preferred embodiment of the present invention for determining thawing conditions;
FIG. 8 is a schematic flow chart of another preferred embodiment for determining thawing conditions in the example of the present invention;
FIG. 9 is a flow chart illustrating the operation of the controller in accordance with another preferred embodiment of the present invention;
fig. 10 is a schematic flow chart of a defrosting control method for a refrigerator according to an embodiment of the present invention in a preferred embodiment.
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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The embodiment of the invention provides a refrigerator 10 which comprises a refrigerator body, wherein at least one storage chamber is arranged in the refrigerator body, and the refrigerator further comprises a refrigerating system.
Specifically, the storage chamber is a refrigerating chamber and/or a freezing chamber for storing articles to be secured or frozen, such as food materials, wine, or medicines. The refrigeration system is used for performing a refrigeration operation. The refrigerator 10 performs a cooling operation by the cooling system, and provides cooling energy to be transmitted to the storage compartment so that the storage compartment is maintained in a constant low temperature state. The refrigeration system of the refrigerator provided by the embodiment of the invention comprises a compressor, a condenser, a drying filter, a capillary tube and an evaporator, and the working composition of the refrigeration system comprises a compression process, a condensation process, a throttling process and an evaporation process.
Wherein, the compression process is as follows: plugging a power cord of the refrigerator, starting the compressor to work under the condition that a contact of the temperature controller is connected, sucking a low-temperature and low-pressure refrigerant by the compressor, compressing the refrigerant into high-temperature and high-pressure superheated gas in a cylinder of the compressor, and then discharging the gas into a condenser; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas is radiated by the condenser, the temperature is continuously reduced, the refrigerant gas is gradually cooled to be normal-temperature and high-pressure saturated vapor and further cooled to be saturated liquid, the temperature is not reduced any more, and the temperature at the moment is called as condensation temperature. The pressure of the refrigerant in the whole condensation process is almost unchanged; the throttling process is as follows: the condensed refrigerant saturated liquid flows into a capillary tube after being filtered by a drying filter to remove moisture and impurities, throttling and pressure reduction are carried out through the capillary tube, and the refrigerant is changed into normal-temperature low-pressure wet vapor; the evaporation process is as follows: the subsequent vaporization begins by absorbing heat in the evaporator, not only reducing the temperature of the evaporator and its surroundings, but also turning the refrigerant into a low temperature, low pressure gas. The refrigerant from the evaporator returns to the compressor again, and the above processes are repeated to transfer the heat in the refrigerator to the air outside the refrigerator, thereby achieving the purpose of refrigeration.
Fig. 1 is a schematic structural diagram of a refrigerator according to a preferred embodiment of the present invention. The refrigerator provided by the embodiment of the invention also comprises a thawing chamber 11, a distance sensor 12 and a controller 13.
The thawing chamber 11 is used for storing food to be thawed and thawing the food to be thawed when in a thawing mode.
Preferably, the thawing chamber 11 is provided in a refrigerating chamber of the refrigerator, and the thawing chamber temperature and the refrigerating chamber temperature are independently controlled and insulated by a physical partition.
Alternatively, the thawing chamber may be provided in the form of a drawer.
The detection range of the distance sensor 12 faces the bottom of the thawing chamber and is used for detecting the distance between the distance sensor and an object. That is, when food is not stored in the thawing chamber, the distance sensor 12 can detect the distance between itself and the bottom of the thawing chamber within the detection range; when food to be defrosted is stored in the defrosting chamber, the food to be defrosted is located in the detection range of the distance sensor 12, and the distance between the distance sensor 12 and the food to be defrosted in the detection range can be detected.
The controller 13 is connected with the distance sensor 12, and the controller 13 acquires the distance information detected by the distance sensor 12 in real time through communication with the distance sensor 12, so that the thawing control of the thawing chamber 11 is realized according to the distance information.
Fig. 2 is a schematic flow chart of the operation performed by the controller in a preferred embodiment of the present invention. The controller 13 is configured to execute steps S11 to S13:
s11, when the defrosting chamber is in a defrosting mode, calculating the thickness of the food to be defrosted according to the distance detected by the distance sensor;
s12, determining the unfreezing condition of the food to be unfrozen according to the thickness; the thawing conditions comprise thawing temperature and thawing time;
and S13, controlling the operation parameters of the thawing chamber according to the thawing conditions.
In the embodiment of the present invention, when a user needs to thaw food, the food to be thawed is stored in the thawing chamber 11, and the thawing function of the thawing chamber is started through a key, voice, or a touch screen, so that the thawing chamber enters a thawing mode.
Further, the controller 13 obtains a distance value currently detected by the distance sensor, and calculates the thickness of the food to be thawed stored in the thawing chamber 11 through a preset algorithm, so as to intelligently determine a corresponding target thawing temperature according to the thickness of the food to be thawed; in addition, the controller 13 can also determine a corresponding target thawing time according to the thickness of the food to be thawed and the target thawing temperature, so as to adjust the operating parameters of the thawing chamber according to the target thawing temperature and the target thawing time, that is, control the thawing chamber to introduce a heat source into the thawing time, so that the indoor temperature reaches the target thawing temperature, and thus, the food to be thawed is completely thawed within the target thawing time.
The embodiment of the invention provides a refrigerator, which comprises a thawing chamber and a distance sensor, wherein the thawing chamber is arranged on the bottom of the thawing chamber; the detection range of the distance sensor faces to the bottom of the unfreezing chamber and is used for detecting the distance between the distance sensor and the object. After the unfreezing chamber is in the unfreezing mode, a controller of the refrigerator calculates the thickness of the food to be unfrozen according to the distance detected by the distance sensor; according to the thickness, determining the unfreezing condition of the food to be unfrozen; the thawing conditions comprise thawing temperature and thawing time; and controlling the operating parameters of the thawing chamber according to the thawing conditions. By adopting the technical means of the embodiment of the invention, as the key factor for determining the unfreezing time of the food is the thickness of the food, the thicker the food is, the larger the temperature difference between the surface and the center in the unfreezing process is, and the longer the unfreezing time is. Therefore, the embodiment of the invention obtains the thickness of the food material to be thawed through the calculation of the set algorithm by arranging the distance sensor, so that the appropriate thawing condition is intelligently matched according to the thickness of the food material to be thawed, the problem of poor thawing efficiency and poor thawing effect caused by the fact that the thawing control of the food is realized by detecting the surface temperature or weight of the food in the prior art is solved, and the food thawing control process is effectively optimized. In addition, the embodiment of the invention does not need to adopt more sensor components, thereby effectively saving the manufacturing cost of the refrigerator and effectively improving the use experience of users.
As a preferable implementation mode, the embodiment of the present invention is further implemented on the basis of the above embodiment, the distance sensor 12 is located at the middle of the upper edge of the rear surface of the thawing chamber 11, and the edge of the maximum detection range of the distance sensor is tangent to the boundary line between the front surface and the lower surface of the thawing chamber.
In particular, in an application scenario, referring to fig. 3 to fig. 4, a schematic view of a mounting structure of a distance sensor in a preferred implementation manner in an embodiment of the present invention is shown. The thawing chamber 11 is provided in the form of a drawer, the thawing chamber 11 includes a front surface, a rear surface, a lower surface, a left surface, and a rear surface, the distance sensor 12 is provided at the middle of the upper edge of the rear surface, and its detection range faces the lower surface of the thawing chamber 11.
The installation angle of the distance sensor can be correspondingly changed according to the sizes of unfreezing chambers of different models and the different parameters of the distance sensor, and the installation angle is based on the following principle: the edge of the maximum detection range of the distance sensor is tangent to the boundary line of the front surface and the lower surface of the thawing chamber.
By adopting the technical means of the embodiment of the invention, the distance sensor is arranged on the upper edge of the rear surface of the thawing chamber, and the installation angle of the distance sensor is adjusted, so that the edge of the maximum detection range of the distance sensor is tangent to the boundary line between the front surface and the lower surface of the thawing chamber, the detection blind area of the distance sensor to the food in the thawing chamber can be effectively reduced, and the accuracy of detecting the distance of the food to be thawed stored in the thawing chamber is effectively improved.
In some optional embodiments, the installation position of the distance sensor 12 may also be the same structural whole as the air duct of the thawing chamber, that is, the distance sensor 12 is fixed on the air duct and does not move with the drawer of the thawing chamber, so as to avoid the situation that the distance sensor moves with the drawer to cause the deviation of the installation position or the installation angle, which leads to inaccurate detection results.
It will be appreciated that the location of the distance sensor is also located at the upper edge of the rear surface of the thawing chamber when the chamber is closed. The installation angle with the drawer is realized by the structure that the sensor is embedded on the air duct, and the beneficial effects obtained by the invention are not influenced.
In a preferred embodiment, the distance sensor is a laser sensor or an ultrasonic sensor.
The detection of the object in the detection range is realized by means of real-time transmission or periodic transmission of laser or ultrasonic waves, and the distance information of the detected object is determined according to the return time of the laser or ultrasonic waves.
Preferably, the lower surface of the thawing chamber is provided with an opaque material comprising at least one of a black coating, a black plastic film and a black metal tray.
By adopting the technical means of the embodiment of the invention, in order to increase the feasibility of distance detection of the distance sensor and the accuracy of the detection result, the method is suitable for the characteristics of high sensitivity and high accuracy of the laser sensor to a dark object with high emissivity, and the opaque material with high emissivity is applied to the bottom of the unfreezing chamber to realize the identification accuracy of the distance sensor.
Referring to fig. 6, a flow chart of calculating the thickness of the food in the embodiment of the present invention in a preferred embodiment is shown. Step S11, namely calculating the thickness of the food to be thawed according to the distance detected by the distance sensor, specifically includes steps S111 to S113:
s111, when the unfreezing chamber is empty, obtaining the distance detected by the distance sensor as a first distance;
s112, when the food to be defrosted is stored in the unfreezing chamber, acquiring the distance detected by the distance sensor as a second distance;
s113, calculating the thickness of the food to be defrosted according to the first distance, the second distance and the height of the rear surface of the defreezing chamber by the following calculation formula:
wherein y is the thickness of the food to be thawed, a is the first distance, and x is the second distance. b is the height of the rear surface of the thawing chamber.
In the embodiment of the present invention, referring to fig. 5, a schematic diagram of a detection principle of a distance sensor in a preferred implementation manner in the embodiment of the present invention is shown. After the distance sensor 12 is installed in the thawing chamber according to the above requirements, when the thawing chamber does not store food, that is, when the thawing chamber is empty, the distance sensor 12 detects the distance a between itself and the lower surface of the thawing chamber within its detection range, and sends the distance a to the controller 13.
When the user deposits the food to be defrosted into the defrosting compartment, the distance sensor 12 detects the distance x between itself and the upper surface of the food to be defrosted within the detection range.
After the user starts the thawing mode of the thawing chamber, the controller 13 obtains the distance x of the food to be thawed, which is detected by the distance sensor 12, and the thickness y of the food to be thawed can be calculated by combining the height b of the rear surface of the thawing chamber and the distance a, which are obtained and stored in advance.
It can be understood that, when the thawing chamber is empty, the controller may acquire and store the distance (the first distance a) detected by the distance sensor, and apply the distance to the subsequent calculation process, without reacquiring every calculation, and of course, the controller may also be configured to reacquire at a certain period to calibrate the first distance a, without affecting the beneficial effect achieved by the present invention.
It is to be understood that the controller may determine the no-load condition or the load condition of the refrigerator according to the state information such as whether the refrigerator is in the defrosting mode, or of course, the controller may also determine the no-load condition or the load condition of the refrigerator by providing a weight sensor to detect the load weight of the defrosting chamber, which is not limited in this regard.
As a preferred embodiment, after the user starts the thawing function, the controller 13 continuously obtains the distance information detected by the distance sensor 12, collects 5 sets of distance data, and uses an average value of the 5 sets of distance data as the distance of the food to be thawed, i.e. the second distance x, to further calculate the thickness y of the food to be thawed, so as to improve the accuracy of detecting the distance of the food to be thawed and further improve the accuracy of detecting the thickness of the food to be thawed.
As a preferred embodiment, refer to fig. 7, which is a schematic flow chart of determining thawing conditions in a preferred embodiment of the present invention. The step S12, namely determining the thawing condition of the food to be thawed according to the thickness, specifically includes steps S121 to S123:
s121, determining a thawing temperature corresponding to the thickness of the food to be thawed as a target thawing temperature according to a preset corresponding relation between the thickness and the thawing temperature;
S122, determining the thawing time corresponding to the thickness of the food to be thawed at the target thawing temperature as the target thawing time according to the preset corresponding relation between the thawing temperature, the thickness and the thawing time;
s123, obtaining the unfreezing condition of the food to be unfrozen according to the target unfreezing temperature and the target unfreezing time.
It should be noted that the freezing rate of food according to the international society for refrigeration in the 70 th 20 th century is defined as the ratio of the shortest distance between the surface and the center of food to the time taken for cooling. Namely, Vt is L/t, wherein Vt is the freezing rate of the food, L is the shortest distance between the surface and the center of the food, and t is time.
Thawing is the inverse process of freezing, and therefore, the thickness of the food is one of the key parameters that determine the thawing rate. In the embodiment of the invention, by identifying the thicknesses of different food materials and recommending proper thawing time at the set thawing temperature T, the food to be thawed is matched with the most proper thawing conditions, and the thawing efficiency is improved.
Specifically, a corresponding relationship between the thickness y and the thawing temperature T is preset and stored in an internal memory of the controller 13, and when the controller 13 calculates the thickness of the food to be thawed, the corresponding relationship can be queried to obtain a suitable target thawing temperature T.
Preferably, the preset correspondence between the thickness and the thawing temperature specifically includes:
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset first thawing temperature, the corresponding thawing temperature is the preset first thawing temperature;
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset second thawing temperature, the corresponding thawing temperature is the preset second thawing temperature; wherein the first thawing temperature is less than the second thawing temperature.
Specifically, referring to fig. 8, a schematic flow chart of another preferred embodiment of the present invention for determining the thawing condition is shown. When the thickness y of the food to be defrosted is detected, if so
If the thickness of the food to be thawed is smaller, introducing a heat source into the thawing compartment to enable the temperature to reach T1; if it is
And (3) indicating that the thickness of the food to be thawed is larger, introducing a heat source into the thawing compartment to enable the temperature to reach T2, wherein T1 is less than T2.
By adopting the technical means of the embodiment of the invention, different thawing temperatures are set for foods to be thawed with different thicknesses, so that the problem that the thawing time is too long due to the fact that the foods to be thawed are too thick, and the use experience of a user is influenced can be effectively avoided.
Further, after the value of the thawing temperature T1 or T2 is determined, corresponding thawing time T is intelligently set according to the preset corresponding relation between the thawing temperature, the thickness and the thawing time by combining the thickness y of the food to be thawed.
By adopting the technical means of the embodiment of the invention, the appropriate unfreezing temperature can be selected according to the thickness of the food to be unfrozen, and the corresponding unfreezing time can be intelligently set by combining the thickness of the food to be unfrozen and the unfreezing temperature, so that the unfreezing control on the food in different states can be effectively realized, the unfreezing efficiency is improved, and a good use experience is provided for a user.
As a preferred embodiment, refer to fig. 9, which is a schematic flowchart of operations performed by the controller in another preferred embodiment according to an embodiment of the present invention. The embodiment of the present invention is further implemented on the basis of any of the above embodiments, and the controller 13 is further configured to execute steps S14 and S15, in addition to the steps S11 to S13:
s14, when the thawing chamber is detected to start entering the thawing mode, after the target thawing time, controlling the thawing chamber to exit the thawing mode;
s15, after the thawing chamber is controlled to exit the thawing mode, acquiring a preset storage temperature, and controlling the operation parameters of the thawing chamber according to the preset storage temperature; wherein the preset storage temperature is less than the first thawing temperature.
In the embodiment of the present invention, a timer is provided for counting down the thawing duration of the thawing chamber 11. For example, after the thawing time t is set to 1h, the timer starts counting, and when the countdown is finished after 1 hour, the thawing chamber is controlled to exit the thawing mode. And controlling the operation parameters of the thawing chamber so as to maintain the indoor temperature of the thawing chamber at the preset storage temperature T0.
Wherein T2 > T1 > T0 is satisfied.
By adopting the technical means of the embodiment of the invention, after the unfreezing chamber is unfrozen, the temperature of the unfreezing chamber is controlled to be maintained at a proper constant value, the food in the unfreezing chamber is stored for a short time, and the influence on the quality of the food is avoided.
Preferably, by arranging the human-computer interaction module, after the thawing chamber is controlled to exit the thawing mode, reminding information is pushed by the human-computer interaction module, for example, a sound prompt is played, and a light or character prompt lamp mode is displayed to remind a user that thawing is finished and food needs to be taken away in time.
Referring to fig. 10, a schematic flow chart of a defrosting control method for a refrigerator according to an embodiment of the present invention in a preferred embodiment is shown. The embodiment of the invention also provides a thawing control method of the refrigerator, wherein the refrigerator comprises the following steps:
The thawing chamber is used for storing food to be thawed;
the distance sensor is arranged in the thawing chamber and used for detecting the distance between the distance sensor and the object;
the defrosting control method of the refrigerator specifically executes the following steps from S21 to S23:
s21, when the defrosting chamber is in a defrosting mode, calculating the thickness of the food to be defrosted according to the distance detected by the distance sensor;
s22, determining the unfreezing condition of the food to be unfrozen according to the thickness; the thawing conditions comprise thawing temperature and thawing time;
and S23, controlling the operation parameters of the thawing chamber according to the thawing conditions.
By adopting the technical means of the embodiment of the invention, the thickness of the food material to be thawed is calculated by the set algorithm through the arrangement of the distance sensor, so that the appropriate thawing condition is intelligently matched according to the thickness of the food material to be thawed, the problem of poor thawing efficiency and poor thawing effect caused by the fact that the thawing control of the food is realized by detecting the surface temperature or weight of the food in the prior art is solved, and the food thawing control process is effectively optimized. In addition, the embodiment of the invention does not need to adopt more sensor components, thereby effectively saving the manufacturing cost of the refrigerator and effectively improving the use experience of users.
As a preferred embodiment, the distance sensor is arranged in the middle of the upper edge of the rear surface of the thawing chamber, and the edge of the maximum detection range of the distance sensor is tangent to the boundary line of the front surface and the lower surface of the thawing chamber; the distance sensor is a laser sensor or an ultrasonic sensor; the lower surface of the thawing chamber is provided with an opaque material, and the opaque material comprises at least one of a black coating, a black plastic film and a black metal tray.
By adopting the technical means of the embodiment of the invention, the detection blind area of the distance sensor to the food in the thawing chamber can be effectively reduced, and the accuracy of detecting the distance of the food to be thawed stored in the thawing chamber is effectively improved.
As a preferred embodiment, the step S21 specifically includes:
when the thawing chamber is empty, acquiring the distance detected by the distance sensor as a first distance;
when the food to be defrosted is stored in the unfreezing chamber, the distance detected by the distance sensor is acquired as a second distance;
calculating the thickness of the food to be thawed according to the first distance, the second distance and the height of the rear surface of the thawing chamber by the following calculation formula:
Wherein y is the thickness of the food to be thawed, a is the first distance, and x is the second distance. b is the height of the rear surface of the thawing chamber;
then, the step S22 specifically includes:
determining the thawing temperature corresponding to the thickness of the food to be thawed as a target thawing temperature according to the preset corresponding relation between the thickness and the thawing temperature;
determining the thawing time corresponding to the thickness of the food to be thawed at the target thawing temperature according to the corresponding relation among the preset thawing temperature, the preset thickness and the preset thawing time, and taking the thawing time as the target thawing time;
obtaining the unfreezing condition of the food to be unfrozen according to the target unfreezing temperature and the target unfreezing time;
wherein, the corresponding relation of the preset thickness and the unfreezing temperature specifically comprises:
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset first thawing temperature, the corresponding thawing temperature is the preset first thawing temperature;
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset second thawing temperature, the corresponding thawing temperature is the preset second thawing temperature; wherein the first thawing temperature is less than the second thawing temperature.
By adopting the technical means of the embodiment of the invention, the appropriate thawing temperature can be selected according to the thickness of the food to be thawed, and the corresponding thawing time can be intelligently set by combining the thickness of the food to be thawed and the thawing temperature, so that the thawing control of the food in different states can be effectively realized, the thawing efficiency can be improved, and a good use experience can be provided for a user.
Preferably, the method further comprises:
when the thawing chamber is detected to start entering the thawing mode, after the target thawing time, controlling the thawing chamber to exit the thawing mode;
after the thawing chamber is controlled to exit the thawing mode, acquiring a preset storage temperature, and controlling the operating parameters of the thawing chamber according to the preset storage temperature; wherein the preset storage temperature is less than the first thawing temperature.
By adopting the technical means of the embodiment of the invention, after the unfreezing chamber is unfrozen, the temperature of the unfreezing chamber is controlled to be maintained at a proper constant value, the food in the unfreezing chamber is stored for a short time, and the influence on the quality of the food is avoided.
It should be noted that, the thawing control method for the refrigerator provided by the embodiment of the present invention is the same as all the process steps of the controller for the refrigerator of the above embodiment, and the working principles and beneficial effects of the two are in one-to-one correspondence, so that the detailed description is omitted.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-only memory (ROM), a Random Access Memory (RAM), or the like.
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 thawing chamber is used for storing food to be thawed;
the detection range of the distance sensor faces to the bottom of the unfreezing chamber and is used for detecting the distance between the distance sensor and the object;
a controller to:
when the unfreezing chamber is in the unfreezing mode, calculating the thickness of the food to be unfrozen according to the distance detected by the distance sensor;
according to the thickness, determining the unfreezing condition of the food to be unfrozen; the thawing conditions comprise thawing temperature and thawing time;
and controlling the operating parameters of the thawing chamber according to the thawing conditions.
2. The refrigerator of claim 1, wherein the distance sensor is located at a middle of an upper edge of a rear surface of the thawing chamber, and an edge of a maximum detection range of the distance sensor is tangent to an intersection line of a front surface and a lower surface of the thawing chamber.
3. The refrigerator according to claim 2, wherein the calculating the thickness of the food to be thawed based on the distance detected by the distance sensor comprises:
when the unfreezing chamber is empty, the distance detected by the distance sensor is obtained and used as a first distance;
when the food to be defrosted is stored in the unfreezing chamber, the distance detected by the distance sensor is acquired as a second distance;
calculating the thickness of the food to be thawed according to the first distance, the second distance and the height of the rear surface of the thawing chamber by the following calculation formula:
wherein y is the thickness of the food to be thawed, a is the first distance, and x is the second distance. b is the height of the rear surface of the thawing chamber.
4. The refrigerator according to claim 3, wherein said determining thawing conditions of said food to be thawed according to said thickness comprises:
determining the thawing temperature corresponding to the thickness of the food to be thawed as a target thawing temperature according to the preset corresponding relation between the thickness and the thawing temperature;
determining the thawing time corresponding to the thickness of the food to be thawed at the target thawing temperature according to the corresponding relation among the preset thawing temperature, the preset thickness and the preset thawing time, and taking the thawing time as the target thawing time;
And obtaining the unfreezing condition of the food to be unfrozen according to the target unfreezing temperature and the target unfreezing time.
5. The refrigerator as claimed in claim 4, wherein the preset correspondence between the thickness and the thawing temperature specifically comprises:
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset first thawing temperature, the corresponding thawing temperature is the preset first thawing temperature;
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset second thawing temperature, the corresponding thawing temperature is the preset second thawing temperature; wherein the first thawing temperature is less than the second thawing temperature.
6. The refrigerator of claim 4, wherein the controller is further configured to:
when the thawing chamber is detected to start entering the thawing mode, after the target thawing time, controlling the thawing chamber to exit the thawing mode;
after the thawing chamber is controlled to exit the thawing mode, acquiring a preset storage temperature, and controlling the operating parameters of the thawing chamber according to the preset storage temperature; wherein the preset storage temperature is less than the first thawing temperature.
7. The refrigerator of claim 2, wherein the distance sensor is a laser sensor or an ultrasonic sensor;
The lower surface of the thawing chamber is provided with an opaque material, and the opaque material comprises at least one of a black coating, a black plastic film and a black metal tray.
8. A defrosting control method of a refrigerator, characterized in that the refrigerator comprises:
the thawing chamber is used for storing food to be thawed;
the detection range of the distance sensor faces to the bottom of the unfreezing chamber and is used for detecting the distance between the distance sensor and the object;
the method comprises the following steps:
when the unfreezing chamber is in the unfreezing mode, calculating the thickness of the food to be unfrozen according to the distance detected by the distance sensor;
according to the thickness, determining the unfreezing condition of the food to be unfrozen; the thawing conditions comprise thawing temperature and thawing time;
and controlling the operating parameters of the thawing chamber according to the thawing conditions.
9. The thawing control method of a refrigerator of claim 8, wherein the distance sensor is located at a middle of an upper edge of a rear surface of the thawing chamber, and an edge of a maximum detection range of the distance sensor is tangent to an intersection line of a front surface and a lower surface of the thawing chamber; the distance sensor is a laser sensor or an ultrasonic sensor; the lower surface of the thawing chamber is provided with an opaque material, and the opaque material comprises at least one of a black coating, a black plastic film and a black metal tray.
10. The thawing control method of a refrigerator according to claim 8, wherein said calculating a thickness of the food to be thawed based on the distance detected by the distance sensor comprises:
when the thawing chamber is empty, acquiring the distance detected by the distance sensor as a first distance;
when the food to be defrosted is stored in the defrosting chamber, the distance detected by the distance sensor is acquired as a second distance;
calculating the thickness of the food to be thawed by the following calculation formula according to the first distance, the second distance and the height of the rear surface of the thawing chamber:
wherein y is the thickness of the food to be thawed, a is the first distance, and x is the second distance. b is the height of the rear surface of the thawing chamber;
then, the determining the thawing condition of the food to be thawed according to the thickness specifically includes:
determining the thawing temperature corresponding to the thickness of the food to be thawed as a target thawing temperature according to the preset corresponding relation between the thickness and the thawing temperature;
determining the thawing time corresponding to the thickness of the food to be thawed at the target thawing temperature according to the corresponding relation among the preset thawing temperature, the preset thickness and the preset thawing time, and taking the thawing time as the target thawing time;
Obtaining the unfreezing condition of the food to be unfrozen according to the target unfreezing temperature and the target unfreezing time;
wherein, the corresponding relation of the preset thickness and the unfreezing temperature specifically comprises:
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset first thawing temperature, the corresponding thawing temperature is the preset first thawing temperature;
when the thickness of the food material to be unfrozen meets the requirement
When the temperature is higher than the preset second thawing temperature, the corresponding thawing temperature is the preset second thawing temperature; wherein the first thawing temperature is less than the second thawing temperature.
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| KR20070043170A (en) * | 2005-10-20 | 2007-04-25 | 삼성전자주식회사 | Apparatus and method of thawing control in refrigerator |
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