CN116264900A - Thawing device and thawing method - Google Patents
Thawing device and thawing method Download PDFInfo
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- CN116264900A CN116264900A CN202111560941.7A CN202111560941A CN116264900A CN 116264900 A CN116264900 A CN 116264900A CN 202111560941 A CN202111560941 A CN 202111560941A CN 116264900 A CN116264900 A CN 116264900A
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- thawing
- thawed
- defrosting
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- 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
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/06—Freezing; Subsequent thawing; Cooling
- A23B4/07—Thawing subsequent to freezing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The invention provides a thawing device and a thawing method, which can determine the temperature, weight and type of a to-be-thawed object, and determine a thawing strategy according to the temperature, weight and type of the to-be-thawed object, so that the thawing strategy can be suitable for the to-be-thawed object with various components, the thawing effect of the to-be-thawed object is ensured, the thawing degree of the to-be-thawed object is ensured to meet the requirement of a user, and the quality of the to-be-thawed object is ensured not to be influenced by a thawing process.
Description
Technical Field
The invention belongs to the technical field of thawing devices, and particularly relates to a thawing device and a thawing method thereof.
Background
Freezing technology has long been adopted by food material production, home and business kitchen users as an effective method for maintaining freshness and quality of agricultural and aquatic products and other processed foods. The technology of freezing technology using equipment such as refrigerators, freezers and the like has been very mature and has reached a high popularity.
The freezing chamber (the chamber temperature of the freezing chamber is generally-18 ℃) of the household refrigerator is used for storing food materials which are not eaten in a short period, particularly various meats, before a user cooks the food materials stored in the freezing chamber, the frozen food materials are usually required to be thawed to about the target temperature of-5 ℃ to 0 ℃, the meats at the temperature are convenient to cut, the meats cannot be cut due to the too low temperature, the meats are not easy to cut due to the too high temperature, and the cut meat pieces or meat slices are not formed.
At present, the thawing method and the defects mainly adopted by the household kitchen are as follows:
the air thawing and the cold storage thawing are simple in operation, but the thawing time is too long, the surface of the food material is easy to oxidize, and the juice loss is serious after thawing.
The water thawing is long in time consumption, bacteria, microorganisms and the like are easy to grow on the surface of the food material in the thawing process, and the food quality is seriously affected.
The heating wire or the heating pipe is used for thawing, the heating efficiency is low, and the temperature of the thawed food is uneven.
When the microwave oven based on the magnetron technology thaws food materials, the magnetron serving as a transmitting source cannot control the phase of electromagnetic waves transmitted by the microwave oven, and the directivity is poor, so that the inside and outside of the food materials are heated unevenly, the temperature difference between the inside and outside of the thawed food materials is overlarge, juice is lost too much, and the quality of the food materials is seriously damaged.
The working frequency adopted for flat capacitive thawing is 40.68MHz; the principle of the flat capacitive type is that a radio frequency signal source forms a voltage of several kilovolts on parallel metal plates through a radio frequency matching device, so that an electric field is formed between the two parallel metal plates like a capacitor, and food materials are thawed by using the electric field. The scheme has the defects that the selected frequency band is low, the size of the annular isolator of the frequency band is too large to use, so that the isolation between a transmitting link and a receiving link of the radio frequency module is not high, the transmitting match is often poor due to the change of thawing food materials, and the power flows backwards into the receiving link to burn the receiving link, so that the quality reliability is low. On the other hand, the working principle determines that the capacitor plate inevitably forms high voltage of several kilovolts, and the existence of the high voltage makes the product lower in safety. In some schemes, a relay opening and closing method is adopted when frequency modulation and/or power adjustment are/is carried out, and noise exists.
Although the thawing apparatus that emits electromagnetic waves of a specific frequency has high thawing efficiency and good temperature uniformity, in such thawing apparatus, thawing time is generally determined by the surface temperature and weight of an object to be thawed. However, since the ingredient contents of the objects to be thawed are not the same, for example, the ingredient contents of fish and meat of the same weight and surface temperature are completely different, the thawing strategy thereof is not common. Therefore, the thawing apparatus has a problem that different kinds of to-be-thawed objects having different contents of components are excessively thawed or insufficiently thawed or the quality is changed after thawing due to the same thawing policy.
The radio-frequency auxiliary heating technology in the radio-frequency oven is also adopted, but the radio-frequency auxiliary heating is generally in a single-frequency mode, the power of the radio-frequency auxiliary heating is relatively low, the radio-frequency auxiliary heating technology is mainly used for thawing small food materials, the efficiency is low when thawing large food materials, the uniformity is poor, and the radio-frequency auxiliary heating technology is not suitable for rapid and uniform thawing of the large food materials in a commercial kitchen.
The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a defrosting device with high defrosting efficiency and good temperature uniformity, so as to solve the problems of excessive defrosting or insufficient defrosting or quality change after defrosting caused by the adoption of the same defrosting strategy for different types of to-be-defrosted objects with different component contents in the conventional defrosting device.
In order to achieve the technical purpose, the invention is realized by adopting the following technical scheme:
a thawing apparatus, comprising:
the thawing cavity is used for accommodating an object to be thawed;
the defrosting antenna is positioned in the defrosting cavity;
the radio frequency power source is used for generating radio frequency signals in a fixed frequency range and sending out the radio frequency signals through the defrosting antenna;
the device comprises:
the temperature detection module is used for detecting the temperature of the object to be thawed;
the image acquisition module is used for acquiring the picture of the object to be thawed;
the storage module is used for storing a plurality of standard pictures of the objects to be defrosted;
the control module is used for acquiring the initial defrosting temperature of the object to be defrosted through the temperature detection module; the image acquisition module is used for acquiring images of the object to be thawed; the image acquisition module is used for acquiring images of the object to be defrosted according to the images acquired by the image acquisition module and the standard images stored by the storage module; the device is used for determining the weight of the object to be thawed according to the volume and the type of the object to be thawed; and the thawing control device is used for determining a thawing strategy according to the initial thawing temperature, weight and type of the object to be thawed and performing thawing control according to the thawing strategy.
A defrosting apparatus as described above, the apparatus comprising:
the incident power detection module is used for detecting electromagnetic wave power Pin transmitted to the defrosting cavity by the radio frequency power source;
the reflected power detection module is used for detecting electromagnetic wave power Pref1 reflected by the defrosting cavity;
the control module is used for calculating electromagnetic wave absorption efficiency according to Pin and Pref1; the thawing time is determined according to the initial thawing temperature, weight, type, electromagnetic wave absorption efficiency and Pin of the object to be thawed.
As described above, the thawing apparatus described above, the thawing time= (initial thawing temperature+target temperature) ×weight of the substance to be thawed/(electromagnetic wave absorption efficiency×pin), wherein the specific heat capacity of the substance to be thawed is determined by the kind of the substance to be thawed.
The thawing device as described above, the radio frequency power source is used to emit radio frequency signals of 430MHz + -40 MHz and 2450MHz + -50 MHz, or 430MHz + -40 MHz and 915MHz + -50 MHz.
In the defrosting device, the defrosting antenna is a dual-frequency antenna.
A thawing method, the method comprising:
detecting the initial thawing temperature of the object to be thawed;
collecting a picture of an object to be defrosted;
determining the volume of an object to be thawed according to the acquired picture; determining the type of the object to be defrosted according to the acquired picture and the standard picture;
determining the weight of the object to be thawed according to the volume and the type of the object to be thawed;
and determining a thawing strategy according to the initial thawing temperature, weight and type of the object to be thawed, and performing thawing control according to the thawing strategy.
A thawing method of a thawing apparatus as described above, the method comprising:
detecting electromagnetic wave power Pin transmitted to the defrosting cavity by a radio frequency power source;
detecting electromagnetic wave power Pref1 reflected back by the defrosting cavity;
calculating electromagnetic wave absorption efficiency according to Pin and Pref1;
and determining the thawing time according to the initial thawing temperature, weight, type, electromagnetic wave absorption efficiency and Pin of the object to be thawed.
As described above, in the thawing method of the thawing apparatus, the thawing time= (initial thawing temperature+target temperature) ×weight of the object to be thawed/(optimal electromagnetic wave absorption efficiency×pin), and the specific heat capacity of the object to be thawed is determined by the type of the object to be thawed.
The thawing device as described above, the radio frequency power source is used to emit radio frequency signals of 430MHz + -40 MHz and 2450MHz + -50 MHz, or 430MHz + -40 MHz and 915MHz + -50 MHz.
In the defrosting device, the defrosting antenna corresponding to the radio frequency power source is a dual-frequency antenna.
Compared with the prior art, the invention has the advantages and positive effects that: the thawing device comprises a thawing cavity, a thawing antenna, a radio frequency power source temperature detection module, an image acquisition module, a storage module and a control module. The defrosting cavity is used for containing objects to be defrosted. The defrosting antenna is positioned in the defrosting cavity. The radio frequency power source is used for generating radio frequency signals with fixed frequency range and emitting the radio frequency signals through the defrosting antenna. The temperature detection module is used for detecting the temperature of the object to be thawed. The image acquisition module is used for acquiring pictures of the object to be thawed. The storage module is used for storing a plurality of standard pictures of the objects to be thawed. The control module is used for obtaining the initial defrosting temperature of the object to be defrosted through the temperature detection module; the image acquisition module is used for acquiring images of the object to be thawed; the image acquisition module is used for acquiring images of the object to be defrosted according to the images acquired by the image acquisition module and the standard images stored by the storage module; the device is used for determining the weight of the object to be thawed according to the volume and the type of the object to be thawed; the method is used for determining a thawing strategy according to the initial thawing temperature, weight and type of the object to be thawed and performing thawing control according to the thawing strategy. The invention can determine the temperature, the weight and the type of the object to be defrosted, and determine the defrosting strategy according to the temperature, the weight and the type of the object to be defrosted, so that the defrosting strategy can be suitable for the object to be defrosted with various components, the defrosting effect of the object to be defrosted is ensured, the defrosting degree of the object to be defrosted is ensured to meet the requirement of a user, and the quality of the object to be defrosted is ensured not to be influenced by the defrosting process.
The thawing method comprises the following steps: detecting the initial thawing temperature of the object to be thawed; collecting a picture of an object to be defrosted; determining the volume of an object to be thawed according to the acquired picture; determining the type of the object to be defrosted according to the acquired picture and the standard picture; determining the weight of the object to be thawed according to the volume and the type of the object to be thawed; and determining a thawing strategy according to the initial thawing temperature, weight and type of the object to be thawed, and performing thawing control according to the thawing strategy. The invention can determine the thawing strategy according to the initial thawing temperature of the to-be-thawed object and the weight and the type of the to-be-thawed object determined according to the acquired picture of the to-be-thawed object. The invention can ensure that the thawing strategy can be suitable for the to-be-thawed objects with various components, ensure the thawing effect of the to-be-thawed objects, ensure that the thawing degree of the to-be-thawed objects meets the requirements of users, and ensure that the quality of the to-be-thawed objects is not influenced by the thawing process.
Other features and advantages of the present invention will become apparent upon review of the detailed description of the invention in conjunction with the drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a thawing apparatus according to an embodiment of the present invention.
Fig. 2 is a flow chart of a thawing method according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The embodiment provides a thawing device, which is an electromagnetic wave thawing mode. The optimal thawing strategy is determined in particular by detecting the initial thawing temperature, weight and type of the substance to be thawed (the composition of the substance to be thawed). According to the method, the device and the system, the defrosting strategy is determined according to the initial defrosting temperature of the to-be-defrosted object, the weight and the type of the to-be-defrosted object determined by the acquired picture of the to-be-defrosted object, the defrosting strategy is ensured to be applicable to various types of to-be-defrosted objects, the defrosting effect of the to-be-defrosted object is ensured, the defrosting degree of the to-be-defrosted object is ensured to meet the requirements of users, and the quality of the to-be-defrosted object is ensured not to be influenced by the defrosting process.
As shown in fig. 1, the thawing device of the present embodiment includes a thawing cavity, a thawing antenna, a radio frequency power source, a temperature detection module, an image acquisition module, a storage module, and a control module. The thawing device also comprises a stabilized voltage power supply.
The defrosting cavity is used for accommodating the object to be defrosted for defrosting, and is provided with a door body, and the defrosting cavity is opened and closed through the door body.
The thawing cavity is a metal cavity, preferably all-metal stainless steel, and electromagnetic wave leakage is prevented; the inner cavity is smooth and flat, and smooth and round at the joint and the corner, so that electromagnetic wave gathering and ignition are avoided.
The door body is used for sealing the defrosting cavity. The door body and the thawing cavity adopt an elastic sealing structure, so that electromagnetic leakage possibly caused by processing errors and assembly errors of the door body and the thawing cavity is compensated.
In general, a food tray is disposed in the thawing cavity, and is used for carrying food, and the to-be-thawed object is placed on the food tray.
The food material tray is made of polyethylene.
The defrosting antenna is positioned in the defrosting cavity and used for emitting electromagnetic waves and radiating energy generated by the radio frequency power source into the defrosting cavity.
The defrosting antenna is positioned at the top of the defrosting cavity.
The radio frequency power source, the control module and the stabilized voltage power supply are all positioned at the top or the rear part of the defrosting cavity, the stabilized voltage power supply supplies power to the control module and the radio frequency power source through power cables, the radio frequency power source is connected with the defrosting antenna through radio frequency cables, and the control module is connected with the radio frequency power source, the temperature detection module and the image acquisition module through signal control cables.
The radio frequency power source is a signal source for generating a thawing signal, and is used for generating a radio frequency signal with a fixed frequency range and emitting the radio frequency signal through a thawing antenna.
The temperature detection module is used for detecting the temperature of the object to be thawed.
The temperature detection module of this embodiment sets up at the top of defrosting cavity, is infrared temperature measurement module for detect the surface temperature of waiting to unfreeze the food, take the surface minimum temperature when beginning to unfreeze to be initial defrosting temperature.
The image acquisition module is used for acquiring pictures of the object to be thawed.
The image acquisition module of this embodiment can include an image acquisition module that sets up at the top of defrosting cavity, detects coarsely. Or, the image acquisition module can comprise a plurality of image acquisition modules arranged in the thawing cavity to form stereoscopic accurate detection.
The storage module is used for storing a plurality of standard pictures of the objects to be thawed to form a database. The standard pictures of the objects to be defrosted are standard pictures of different types of objects to be defrosted, and are generally distinguished by colors and textures of the objects to be defrosted. For example, the colors and textures of various fishes and meats are different, and the type of the object to be thawed is determined by the characteristics of the colors and textures.
The control module is used for obtaining the initial defrosting temperature of the object to be defrosted through the temperature detection module.
The control module is used for determining the volume of the object to be thawed according to the picture acquired by the image acquisition module.
The installation position of the image acquisition module is determined, the acquisition angle is determined, and the size of the thawing cavity is determined. When the object to be defrosted is placed in the defrosting device, the image acquisition module photographs the object to be defrosted, compares the photographed image with the original defrosting cavity image, calculates the relative size of the object to be defrosted and the defrosting cavity, and calculates the actual size of the object to be defrosted according to the actual size of the cavity and the acquired angle.
The control module is used for determining the type of the object to be defrosted according to the picture acquired by the image acquisition module and the standard picture stored by the storage module, and the composition, namely the density, of the object to be defrosted can be determined according to the type of the object to be defrosted.
The control module is used for determining the weight of the object to be defrosted according to the volume and the type (density) of the object to be defrosted.
The control module is used for determining a defrosting strategy according to the initial defrosting temperature, the weight and the type of the object to be defrosted and performing defrosting control according to the defrosting strategy.
Preferably, the thawing apparatus of the present embodiment includes:
the incident power detection module is used for detecting electromagnetic wave power Pin transmitted to the defrosting cavity by the radio frequency power source.
The reflected power detection module is used for detecting electromagnetic wave power Pref1 reflected back by the defrosting cavity.
The control module is used for calculating the electromagnetic wave absorption efficiency according to Pin and Pref1.
Electromagnetic wave absorption efficiency= (Pin-Pref 1)/Pin.
The control module is used for determining the thawing time according to the initial thawing temperature, weight, type, electromagnetic wave absorption efficiency and Pin of the object to be thawed.
Specifically, the thawing time= (initial thawing temperature+target temperature) ×weight of the object to be thawed/(electromagnetic wave absorption efficiency×pin), wherein the specific heat capacity of the object to be thawed is determined by the type of the object to be thawed.
Wherein the target temperature is the temperature of the object to be defrosted after defrosting, and is generally-5-0 ℃.
The temperature of the object to be defrosted after defrosting in the embodiment is determined, so that the object to be defrosted is ensured to be suitable for cutting.
Preferably, the rf power source of the present embodiment is an rf power source capable of generating two frequencies.
Specifically, the radio frequency power source of this embodiment is used for sending out radio frequency signals of 430mhz±40MHz and 2450mhz±50MHz, or 430mhz±40MHz and 915mhz±50MHz, so as to achieve the purpose of rapid and uniform thawing.
The two output ends of the radio frequency power source are connected with the corresponding input ends of the different frequency combiner, and finally the common radio frequency output end is connected with the defrosting antenna.
The defrosting antenna of the present embodiment is preferably a dual-frequency antenna.
Generally, the thawing device is provided with two radio frequency power sources, each radio frequency power source can independently work in two frequency bands, and the maximum output power is half of the maximum radio frequency output power of the whole device.
The embodiment adopts a power source with electromagnetic wave power more than or equal to 500W to ensure that the food less than or equal to 5kg is thawed within 20 minutes, so that the thawing time is short, the juice loss is avoided, and the thawing time is short, and the juice loss is avoided.
The experimental comparison results of the same object to be thawed after being thawed in different modes are as follows:
the embodiment also provides a defrosting method, which comprises the following steps:
detecting the initial thawing temperature of the object to be thawed;
preferably, the temperature detection module detects the surface temperature of the food material to be thawed, and the lowest surface temperature is taken as the initial thawing temperature.
And collecting a picture of the object to be thawed.
Determining the volume of an object to be thawed according to the acquired picture; and determining the type of the object to be thawed according to the acquired picture and the standard picture.
And determining the weight of the object to be thawed according to the volume and the type of the object to be thawed.
And determining a thawing strategy according to the initial thawing temperature, weight and type of the object to be thawed, and performing thawing control according to the thawing strategy.
Further, the thawing method further comprises:
detecting electromagnetic wave power Pin transmitted to the defrosting cavity by a radio frequency power source;
detecting electromagnetic wave power Pref1 reflected back by the defrosting cavity;
calculating electromagnetic wave absorption efficiency according to Pin and Pref1;
the thawing time is determined according to the initial thawing temperature, weight, type, electromagnetic wave absorption efficiency and Pin of the object to be thawed.
Preferably, the thawing time= (initial thawing temperature+target temperature) ×weight of the object to be thawed/(optimal electromagnetic wave absorption efficiency×pin), wherein the specific heat capacity of the object to be thawed is determined by the type of the object to be thawed.
The radio frequency power source is used for emitting radio frequency signals of 430MHz + -40 MHz and 2450MHz + -50 MHz or 430MHz + -40 MHz and 915MHz + -50 MHz.
The defrosting antenna corresponding to the radio frequency power source is a dual-frequency antenna.
Specifically, as shown in fig. 2, the control method includes the following steps:
s1, starting.
And placing the object to be defrosted into the defrosting cavity and receiving a defrosting start signal.
S2, detecting the temperature of the object to be thawed by the temperature detection module.
Preferably, the temperature detection module detects the surface temperature of the food material to be thawed, and the lowest surface temperature is taken as the initial thawing temperature.
S3, collecting a picture of the object to be thawed.
S4, determining the volume of the object to be thawed according to the acquired picture; and determining the type of the object to be thawed according to the acquired picture and the standard picture.
S5, determining the weight of the object to be defrosted according to the volume and the type of the object to be defrosted.
S6, controlling the radio frequency power source to emit radio frequency signals, detecting electromagnetic wave power Pin transmitted to the defrosting cavity by the radio frequency power source, detecting electromagnetic wave power Pref1 reflected back by the defrosting cavity, and calculating electromagnetic wave absorption efficiency according to the Pin and the Pref1.
Electromagnetic wave absorption efficiency= (Pin-Pref 1)/Pin.
S7, determining the thawing time according to the initial thawing temperature, weight, type, electromagnetic wave absorption efficiency and Pin of the object to be thawed.
Specifically, the thawing time= (initial thawing temperature+target temperature) ×the weight of the object to be thawed/(optimal electromagnetic wave absorption efficiency) ×pin), where the specific heat capacity of the object to be thawed is determined by the type of the object to be thawed.
Wherein the target temperature is the temperature of the object to be defrosted after defrosting, and is generally-5-0 ℃.
The defrosting strategy of the embodiment is determined according to the weight of the to-be-defrosted object, the ingredients of the to-be-defrosted object and the initial defrosting temperature of the to-be-defrosted object, the defrosting strategy accords with the to-be-defrosted object, the defrosting time can be reduced, the defrosting quality of the to-be-defrosted object can be guaranteed, the temperature of the to-be-defrosted object after being defrosted is determined, and the to-be-defrosted object is guaranteed to be suitable for cutting.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A thawing apparatus, comprising:
the thawing cavity is used for accommodating an object to be thawed;
the defrosting antenna is positioned in the defrosting cavity;
the radio frequency power source is used for generating radio frequency signals in a fixed frequency range and sending out the radio frequency signals through the defrosting antenna;
characterized in that the device comprises:
the temperature detection module is used for detecting the temperature of the object to be thawed;
the image acquisition module is used for acquiring the picture of the object to be thawed;
the storage module is used for storing a plurality of standard pictures of the objects to be defrosted;
the control module is used for acquiring the initial defrosting temperature of the object to be defrosted through the temperature detection module; the image acquisition module is used for acquiring images of the object to be thawed; the image acquisition module is used for acquiring images of the object to be defrosted according to the images acquired by the image acquisition module and the standard images stored by the storage module; the device is used for determining the weight of the object to be thawed according to the volume and the type of the object to be thawed; and the thawing control device is used for determining a thawing strategy according to the initial thawing temperature, weight and type of the object to be thawed and performing thawing control according to the thawing strategy.
2. The thawing device as defined in claim 1, wherein the device comprises:
the incident power detection module is used for detecting electromagnetic wave power Pin transmitted to the defrosting cavity by the radio frequency power source;
the reflected power detection module is used for detecting electromagnetic wave power Pref1 reflected by the defrosting cavity;
the control module is used for calculating electromagnetic wave absorption efficiency according to Pin and Pref1; the thawing time is determined according to the initial thawing temperature, weight, type, electromagnetic wave absorption efficiency and Pin of the object to be thawed.
3. The thawing device according to claim 2, wherein the thawing time = (initial thawing temperature + target temperature) × the weight of the substance to be thawed/(electromagnetic wave absorption efficiency) × Pin), and wherein the specific heat capacity of the substance to be thawed is determined by the type of the substance to be thawed.
4. A defrosting apparatus according to any one of claims 1 to 3, wherein the radio frequency power source is adapted to emit radio frequency signals of 430MHz ± 40MHz and 2450MHz ± 50MHz, or 430MHz ± 40MHz and 915MHz ± 50 MHz.
5. The defrosting apparatus of claim 4 wherein the defrosting antenna is a dual frequency antenna.
6. A thawing method, characterized in that the method comprises:
detecting the initial thawing temperature of the object to be thawed;
collecting a picture of an object to be defrosted;
determining the volume of an object to be thawed according to the acquired picture; determining the type of the object to be defrosted according to the acquired picture and the standard picture;
determining the weight of the object to be thawed according to the volume and the type of the object to be thawed;
and determining a thawing strategy according to the initial thawing temperature, weight and type of the object to be thawed, and performing thawing control according to the thawing strategy.
7. The thawing method of the thawing device as defined in claim 6, wherein the method comprises:
detecting electromagnetic wave power Pin transmitted to the defrosting cavity by a radio frequency power source;
detecting electromagnetic wave power Pref1 reflected back by the defrosting cavity;
calculating electromagnetic wave absorption efficiency according to Pin and Pref1;
and determining the thawing time according to the initial thawing temperature, weight, type, electromagnetic wave absorption efficiency and Pin of the object to be thawed.
8. The thawing method of the thawing apparatus according to claim 7, wherein the thawing time = (initial thawing temperature + target temperature) × the weight of the substance to be thawed/(optimal electromagnetic wave absorption efficiency) Pin), and wherein the specific heat capacity of the substance to be thawed is determined by the kind of the substance to be thawed.
9. The defrosting apparatus of any one of claims 6 to 8 wherein the radio frequency power source is configured to emit radio frequency signals of 430MHz ± 40MHz and 2450MHz ± 50MHz, or 430MHz ± 40MHz and 915MHz ± 50 MHz.
10. The thawing device of claim 9, wherein the thawing antenna corresponding to the radio frequency power source is a dual frequency antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111560941.7A CN116264900A (en) | 2021-12-17 | 2021-12-17 | Thawing device and thawing method |
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