JPH11294921A - Freezing refrigerator with detector for food temperature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sensor for the temperature of foods which achieves a compact designing and no contact with foods while eliminating the need for altering and adjustment depending on the type of the foods by enabling optimal thawing and heating cooking with a heating cooker even when a temperature difference is large between the inside and the surface of the foods. SOLUTION: In a freezing refrigerator 1 for storing foods by freezing or cold storage, sensors 11a, 11b, 11c and 11d for the temperature of the foods is provided to detect the ambient temperature of foods 9a and 9b, a memory means 12 to store heat transfer characteristic of the foods and temperature of foods computing means 13a and 13b to compute the internal temperature from the ambient temperature and the heat transfer characteristic of the foods to detect the internal temperature of the foods 9a and 9b stored. Thus, the detected internal temperature of the foods is passed onto thermal cookers 15a, 15b, 15c and 15d to accomplish the optimal thawing and heating cooking with the heating cookers based on the internal temperature of the foods and the surface temperature of the foods detected on the side of the heating cookers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator for freezing or refrigerated food, storing the food, and then using the thawing / heating apparatus to defrost and heat the food for use.

[0002]

2. Description of the Related Art A technique for detecting the temperature of a food when the food is thawed and cooked is disclosed in, for example, JP-A-6-10184.
No. 6 discloses this. Hereinafter, the above-described conventional product temperature detection technology will be described with reference to the drawings.

FIG. 4 is a front sectional view of a heating cooker using a conventional product temperature detecting technique. In FIG. 4, reference numeral 51 denotes a cooking chamber, and 52 denotes a cooking dish installed in the cooking chamber 51. Numeral 53 denotes food, which is placed on the cooking dish 52.
An operation panel 54 has a cooking start button 56. Reference numeral 57 denotes a magnetron that performs high-frequency output for performing cooking. An infrared sensor 58 detects the surface temperature of the food 53.

[0004] The operation of the heating cooker configured as described above will be described below. First, the user places the food 53 on the cooking dish 52 and presses the cooking start button 56 to start cooking. When cooking is started, the infrared sensor 58 detects the food 5
3, the high-frequency output of the magnetron 57 is adjusted according to the detected surface temperature of the food 53, and the cooking is performed. Further, the infrared sensor 58 detects the surface temperature of the food 53 even during the heating and cooking, and ends the heating and cooking when the surface temperature reaches a certain temperature.

A technique for detecting the temperature of food while storing the food is disclosed, for example, in Japanese Patent Application Laid-Open No. 7-225875. Hereinafter, the above-described conventional product temperature detection technology will be described with reference to the drawings.

FIG. 5 shows a configuration diagram of a product temperature sensor installed in a conventional storage. In FIG. 5, a product temperature sensor 61 includes a thermistor main body 62 and an epoxy resin 63 surrounding the main body.
It is constituted by. The epoxy resin 63 measures the two heat capacities of the thermistor main body 62 and the food, and sequentially winds the thermistor main body 62 while adjusting the rate of change of the detected temperature for each unit elapsed time so that the heat capacity becomes the same as the food. This is to make the temperature detected by the temperature sensor 61 equal to the temperature of the food.

[0007]

However, in the first conventional example, since the high-frequency output of heating and cooking is adjusted only from the surface temperature of the food at the start of cooking, the internal temperature and the surface temperature of the food are adjusted. If the temperature difference is large,
There was a drawback that the finish of heating cooking was poor.

[0008] For example, when thawing or heating cooking of frozen food, there is a high possibility that the thawing will be insufficient or the heating time will be excessively long so that the thawing will not be insufficient. there were.

[0009] The present invention solves the conventional problems, and enables a food cooker to perform optimal thawing and heating cooking even when the temperature difference between the internal temperature and the surface temperature of the food is large. An object of the present invention is to provide a refrigerator with a detection device.

In the second conventional example, since the specific heat of the epoxy resin surrounding the thermistor body of the product temperature sensor is small, depending on the type of food, the epoxy resin is required to meet the heat capacity of the food. There is a drawback that the temperature sensor itself becomes large and the inside of the storage becomes narrower. In addition, there is a disadvantage that it is necessary to change the product temperature sensor or adjust the heat capacity depending on the type of food.

[0011] Another object of the present invention is to solve the conventional problem, and it is not necessary to change or adjust the product temperature sensor even if the product temperature sensor is not bulky and compact and the type of food changes. Another object of the present invention is to provide a product temperature detecting device that can detect the temperatures of different types of foods with one type of sensor.

[0012]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention relates to a refrigerator for freezing or refrigerated storage of food, which is provided in a storage to detect an ambient temperature of the stored food. The temperature of the food, the storage means for storing the heat transfer characteristics of the stored food, the ambient temperature of the food detected by the temperature sensor, and the heat transfer characteristics of the food stored by the storage means, the internal temperature of the food, The temperature of the stored food is detected, the detected internal temperature of the food is passed to the cooking device, and the internal temperature of the food and the food detected by the cooking device are detected. Depending on the surface temperature, it is possible to perform optimal thawing and cooking with a cooking device.

[0013] Thus, even when the temperature difference between the internal temperature and the surface temperature of the food is large, it is possible to always provide good finished food without over-thawing or insufficient thawing, and without overheating or insufficient heating. .

[0014] The article temperature sensor is installed on the bottom surface of the storage to detect the temperature of the bottom surface of the stored food, and the temperature sensor is installed in the circulating air at the top of the storage to store the food. Since the temperature sensor comprises an upper temperature sensor for detecting the ambient temperature of the upper portion of the prepared food, the product temperature sensor is not bulky, compact, and does not narrow the inside of the storage.

In addition, even if the kind of food changes, it can be dealt with only by changing the storage contents of the storage means, so that there is no need to change or adjust the temperature sensor, and the temperature of different kinds of food is one. A highly versatile product temperature detection device that can be detected by the above sensor can be provided.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is provided with a storage which can store food by freezing or refrigeration, and is provided in the storage to detect an ambient temperature of the stored food. A temperature sensor, storage means for storing heat transfer characteristics of the stored food, an ambient temperature of the food detected by the product temperature sensor, and a heat transfer characteristic of the food stored by the storage means, the inside of the food A temperature calculating means for calculating a temperature;
A food temperature output device that outputs the internal temperature of the food calculated by the food temperature calculation device; and a food temperature detection device that receives the food temperature output from the food temperature output device of the food temperature detection device. Refrigeration refrigerator with a product temperature detection device characterized by performing thawing and heating cooking with a thawing heating cooking device, detecting the internal temperature of stored food, and detecting the internal temperature of the food to the thawing heating cooking device. The temperature difference between the internal temperature of the food and the surface temperature is large by performing the optimal thawing and cooking by the thawing heating cooking device based on the internal temperature of the food and the surface temperature of the food detected by the thawing heating cooking device. Even in such a case, it is possible to always provide a good finished food without over-thawing or under-thawing, and without over-heating or under-heating.

According to a second aspect of the present invention, the article temperature sensor of the article temperature detecting device is provided on a bottom surface of the inside of the storage, and detects a bottom temperature of the stored food; 2. The refrigerator according to claim 1, further comprising an upper temperature sensor installed in the circulating air to detect an upper ambient temperature of the stored food, wherein the temperature sensor is not bulky. It is compact and does not make the inside of the storage space narrow.

According to a third aspect of the present invention, the storage means of the product temperature detecting device includes an upper overall heat transfer coefficient from an upper atmosphere of the food to an inner center of the food and a lower overall heat transfer coefficient from the bottom of the food to the inner center of the food. The overall heat transfer coefficient, the upper surface area of the food, the lower surface area of the food, and the heat capacity of the food are stored, and the product temperature calculating unit is configured to read the detected value of the product temperature sensor and the storage content of the storage unit. 2. The refrigerator according to claim 1, wherein the refrigerator calculates the temperature of the food without contact with the food and has good responsiveness. it can. Further, even if the type of food changes, it is possible to cope with it only by changing the storage contents of the storage means, and it is not necessary to change or adjust the product temperature sensor. A highly versatile product temperature detection device capable of detection can be provided.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a refrigerator-freezer with a product temperature detecting device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a refrigerator having an article temperature detecting device according to an embodiment of the present invention, FIG. 2 is a diagram showing a food heat transfer model for representing the heat transfer characteristics of food, and FIG. It is a flow chart for explaining operation of the example.

In FIG. 1, reference numeral 1 denotes a freezer-refrigerator, which has two storages, an A storage 2a and a B storage 2b, which can store food by freezing or refrigeration. A cooling unit 3 cools the inside of the refrigerator, and supplies cooled air (hereinafter, abbreviated as cold air) into the refrigerator. 4a is a temperature sensor in A warehouse provided in A warehouse 2a, and 4b is a temperature sensor in B warehouse provided in B warehouse 2b. Reference numeral 5a denotes an A-compartment temperature detecting means for detecting the inside temperature of the A-compartment by the A-compartment temperature sensor 4a. Reference numeral 5b denotes an inside of the B-compartment for detecting the inside temperature of the B-compartment by the B-compartment temperature sensor 4b. It is a temperature detecting means. 6a is A warehouse 2
A internal temperature setting means for setting the internal temperature of a;
b is a B-compartment temperature setting means for setting the inside temperature of the B-compartment 2b. Reference numeral 7a denotes an A-compartment temperature judging unit for judging whether or not the inside-compartment temperature detected by the A-compartment temperature detection unit 5a exceeds the A-compartment set temperature set by the A-compartment temperature setting unit 6a. B-compartment temperature determining means for determining whether or not the inside-compartment temperature detected by the B-compartment temperature detecting means 5b exceeds the B-compartment set temperature set by the B-compartment temperature setting means 6b. Reference numeral 8a denotes an A-compartment cooling control unit that controls the cooling of the A-compartment 2a based on the determination result of the A-compartment internal temperature determination unit 7a. This is B-room cooling control means.
9a is the food stored in the A storage, and 9b is the food stored in the B storage.

Reference numeral 10 denotes an article temperature detecting device, and an article temperature sensor 1
1a, 11b, 11c, 11d, storage means 12, product temperature calculating means 13a, 13b, and product temperature output means 14.

11a and 11b store food 9 in A warehouse 2a.
food 9 that is installed at a position opposite to and sandwiches a
11a is an article temperature sensor for detecting the ambient temperature of a.
An A-compartment upper temperature sensor installed in the circulating air in the upper part of the storage 2a and detecting the upper ambient temperature of the stored food 9a, and 11b is installed on the bottom surface of the A storage 2a and the bottom surface of the stored food 9a. This is a lower temperature sensor of the A compartment for detecting the temperature.

11c and 11d store the food 9 in the B warehouse 2b.
food 9 installed at a position opposite to and sandwiching b
a temperature sensor for detecting the ambient temperature of b;
A B-compartment upper temperature sensor that is installed in the circulating air in the upper part of the storage 2b and detects the upper ambient temperature of the stored food 9b, and 11d is installed on the bottom surface of the B storage 2b and is the bottom surface of the stored food 9b. This is a lower temperature sensor of the B-chamber for detecting the temperature.

Reference numeral 12 denotes storage means for storing the heat transfer characteristics of the stored foods 9a and 9b. 13a calculates the internal temperature of the food 9a from the ambient temperature of the food 9a detected by the A-compartment upper temperature sensor 11a and the A-compartment lower temperature sensor 11b and the heat transfer characteristics of the food 9a stored in the storage means 12. The A-compartment temperature calculating means 13b has an ambient temperature of the food 9b detected by the B-compartment upper temperature sensor 11c and the B-compartment lower temperature sensor 11d, and a heat transfer characteristic of the food 9b stored in the storage means 12. Is a B-ware temperature calculating means for calculating the internal temperature of the food 9b.

Reference numeral 14 denotes an article temperature output means for selectively outputting the internal temperatures of the foods 9a and 9b calculated by the A article temperature calculating means 13a and the B article temperature calculating means 13b. , 15b, 15c, and 15d by wire.

The thawing / heating cooking apparatus group 15a, 15b,
Reference numerals 15c and 15d denote product temperature output means 1 of the product temperature detection device 10.
In response to the internal temperature of the food output from 4, the food is thawed and cooked.

FIG. 2 is a diagram showing a food heat transfer model for representing the heat transfer characteristics of the food stored in the storage means 12. As shown in FIG. In the present embodiment, as the food whose internal temperature is to be detected, rice cooked in a plastic case, such as a frozen lunch, is taken.

In FIG. 2, 21 is cooked rice, and 22 is a container for storing cooked rice 21. Reference numeral 23 denotes a food lid. T1 is the upper atmosphere temperature of the food, T2 is the bottom temperature of the food, T3 is the internal temperature of the food to be detected this time, and is the temperature of the internal center of the food indicated by a black circle in FIG.
A1 is the upper surface area of the food, which is the outer surface area of the food above the horizontal plane including the inner center of the food. A2 is the lower surface area of the food, which is the outer surface area of the food below the horizontal plane including the inner center of the food. K1 is the overall heat transfer coefficient of the upper part of the food, and is a value derived from the heat transfer coefficient of air from the upper atmosphere of the food to the center of the food, the heat conductivity of the top lid, and the heat conductivity of cooked rice. K2 is the overall heat transfer coefficient of the lower part of the food, and is a value derived from the thermal conductivity of the container from the bottom of the food to the inner center of the food or the thermal conductivity of the cooked rice. C is the heat capacity of the food. In this example, cooked rice occupies most of the cooked food, and is a value derived from the product of the specific heat and the weight of cooked rice.

The storage means 12 stores an upper overall heat transfer coefficient K1, a lower overall heat transfer coefficient K2, an upper surface area A1, a lower surface area A2 of the food, and a heat capacity C of the food.

In the heat transfer model shown in FIG. 2, when the amount of heat entering from the upper part of the food is Q1 and the amount of heat entering from the lower part of the food is Q2, the amount of heat entering per unit time ΔQ
1 and ΔQ2 are given by the following equations, respectively.

[Delta] Q1 = K1A1 (T1-T3) [Delta] Q2 = K2A2 (T2-T3) Therefore, when the total amount of heat entering the food is Q, the total amount of heat entering per unit time ΔQ is the amount of heat entering from the top and the amount of heat entering from the bottom. Is the sum of the invading heat quantities of

ΔQ = ΔQ1 + ΔQ2 = (K1A1T1 +
(K2A2T2)-(K1A1 + K2A2) T3 The total amount of heat of penetration ΔQ per unit time is represented by a differential value of the total amount of heat of penetration Q with time t. In addition, since the internal temperature T3 of the food having the heat capacity C increases due to the amount of heat Q that enters, ΔQ = dQ / dt = C · dT3 / dt. Therefore, C · dT3 / dt = (K1A1T1 + K2A2T2) −
(K1A1 + K2A2) T3, and the solution of this differential equation is represented by (Equation 1) where the initial value of the internal temperature T3 of the food is T0.

[0034]

(Equation 1)

Further, even in the case where the temperature of the food decreases as the food is cooled, Q is defined as the amount of heat released from the food.
The exact same equation as (Equation 1) is obtained.

The product temperature calculating means 13a and 13b take the temperature of the upper atmosphere of the food 9a detected by the upper temperature sensor 11a of the warehouse A as T1, and the temperature sensor 11b of the lower warehouse A takes the case of the warehouse A as an example. The bottom surface temperature of the food 9a obtained is T2, and the heat transfer characteristic K of the food 9a stored in the storage means 12
1, K2, A1, A2, and C according to (Equation 1)
The internal temperature T3 of the food 9a is calculated.

The initial value T0 of the internal temperature T3 of the food is:
Assuming that the temperature when the food is first placed in the refrigerator is a freezing temperature (for example, −20 ° C.), the calculation is repeated according to (Equation 1). The internal temperature T3 converges to a true value.

The operation of the refrigerator-freezer with the product temperature detecting device constructed as described above will be described below with reference to FIGS. 1, 2 and 3.

In FIG. 3, first, the A-compartment temperature detecting means 5a detects the inside-compartment temperature in the A-compartment by the A-compartment temperature sensor 4a (Step 1).

The A-compartment judging means 7a determines that the temperature in the A-compartment detected by the A-compartment temperature detecting means 5a exceeds the A-compartment set temperature set by the A-compartment temperature setting means 6a. Is determined (Step 2). As a result, when the temperature in the refrigerator A is higher than the set temperature in the refrigerator A,
The A-chamber cooling control means 8a converts the cool air generated by the cooling means 3 into A
It is supplied to the storage (Step 3). If the inside temperature of the A-compartment is lower than the A-compartment set temperature, the A-compartment cooling control means shuts off the cool air in the A-compartment (Step 4).

Next, the B-compartment temperature detecting means 5b detects the B-compartment internal temperature using the B-compartment temperature sensor 4b (St).
ep5).

The B-compartment judging means 7b determines that the B-compartment temperature detected by the B-compartment temperature detecting means 5b exceeds the B-compartment set temperature set by the B-compartment temperature setting means 6b. Is determined (Step 6). As a result, when the temperature in the B-chamber is higher than the set temperature in the B-chamber,
The B-chamber cooling control means 8b converts the cold air generated by the cooling means 3 into B
It is supplied to the storage (Step 7). If the inside temperature of the B-compartment is lower than the set temperature of the B-compartment, the B-compartment cooling control means shuts off the cool air in the B-compartment (Step 8).

Next, the A-chamber upper temperature sensor 11a
The upper atmosphere temperature of the food 9a is detected as T1, and the lower temperature sensor 11b of the A compartment detects the bottom temperature of the food 9a as T2 (St)
ep9). Then, the product temperature calculating means 13a stores the storage means 1
2 stores the heat transfer characteristics K1, K2, A of the food 9a
An internal temperature T3 of the food 9a is calculated from 1, A2, and C according to (Equation 1) (Step 10).

Next, the B-chamber upper temperature sensor 11c is
b, the upper atmosphere temperature is detected as T1, and the B-chamber lower temperature sensor 11d detects the bottom temperature of the food 9b as T2 (St)
ep11). Then, the product temperature calculating means 13b calculates the heat transfer characteristics K1, K2, A of the food 9b stored in the storage means 12.
An internal temperature T3 of the food 9a is calculated from 1, A2, and C according to (Equation 1) (Step 12).

Next, the food 9 stored in the A warehouse 2a
It is assumed that “a” is taken out and put into the thawing / heating cooking device 15a (Step 13). Here, it is assumed that the A-compartment 2a is set to a -20 ° C freezing temperature by the A-compartment temperature setting means 6a.

Then, the food temperature output means 14 outputs the internal temperature of the food 9a calculated by the food temperature calculation means 13a to the thawing / heating cooking device 15a connected by wire (S).
step14).

Then, the thawing / heating cooking device 15a receives the internal temperature of the food 9a in the A warehouse output from the product temperature output means 14, and performs thawing and heating cooking (Step 1).
5).

Next, the food 9 stored in the B
It is assumed that b is taken out and put into the thawing / heating cooking device 15d (Step 16).

Here, the refrigerator B 2b was originally set at a freezing temperature of −20 ° C., but the food 9 stored in the refrigerator B is
The operator predicts that b will be heated and used, and the operator operates the B-chamber temperature setting means 6b a predetermined time before (about 8 hours before in this case) to switch to the partial temperature of -3 ° C. By doing so, the food 9 in the B warehouse 2b that has been frozen and stored
b was previously thawed to a partial temperature.

Then, the food temperature output means 14 outputs the internal temperature of the food 9b calculated by the food temperature calculation means 13b to the thawing / heating cooking device 15d connected by wire (S).
step17).

Then, the thawing heating cooking device 15d receives the internal temperature of the food 9b in the refrigerator B output from the product temperature output means 14 and performs heating cooking (Step 18).
Return to p1.

By the above operation, the refrigerator-freezer with the product temperature detecting device of the present embodiment performs the cooling and preservation of the food stored in the storage and the detection of the internal temperature of the food.

Although the method of detecting the food temperature according to the present embodiment is such that even if there is an error in the initial value T0 of the internal temperature T3 of the food, it converges to the true value after a certain period of time. , In a frozen lunch containing 300 g of cooked rice, the time constant τ is about 1 hour, and even if the initial value T0 of the internal temperature T3 initially has an error of 10 ° C., the calculation is repeated according to (Equation 1). The error converges to within 0.5 ° C. in 3 hours, and the accuracy is no problem as a practical product temperature detecting device. For example, in the case where a frozen lunch is thawed and cooked and sold, remove sales peaks such as lunch hours,
Once a day, at regular times, frozen lunches are brought in from the freezer truck, and it is sufficiently possible to keep them in the refrigerator for a certain period of time from the time of bringing in to the time of sale.

However, the initial temperature T0 may be estimated by any method, for example, by measuring the temperature of a simulated load having the same heat transfer characteristics as the food enclosed with the food, and input to the product temperature detecting device. is there.

Further, the method of detecting the food temperature according to the present embodiment, as shown in the heat transfer model of FIG.
Although the heat transfer characteristic of the food is approximated to the first-order lag system, the calculation may be performed by approximating the second-order lag system, the third-order lag system, or the like in consideration of the heat storage on the surface of the food. The calculation becomes complicated, but the accuracy increases.

Further, in the product temperature detecting device 10 of the present embodiment, the product temperature sensors 11a, 11b, 11c, 11d detect the ambient temperature of the food at regular intervals, and the product temperature calculating means 13a, 1
3b, the calculation is performed at regular time intervals regardless of whether the detection values of the product temperature sensors 11a, 11b, 11c, 11d do not change. However, in order to reduce the calculation frequency and reduce the calculation load, The temperature calculating means 13a, 13b may not calculate when the detected values of the product temperature sensors 11a, 11b, 11c, 11d are constant values, but may calculate each time the detected values change. is there.

In this embodiment, the food 9a in the refrigerator A and the food 9b in the refrigerator B may be of the same type and have the same heat transfer characteristics, or may be of different types and have different heat transfer characteristics. It is a good thing. However, in the case of different types, the storage unit 12 stores the heat transfer characteristics for each type of food.

Further, in this embodiment, two temperature sensors for detecting the ambient temperature of the food are provided around the foods 9a and 9b, respectively. The number may be increased, and if the ambient temperature of the food is to be equalized, one food temperature sensor may be used for one food.

In the refrigerator 1 of the present embodiment, the number of storages that can store food by freezing or refrigeration is two. However, regardless of this, a plurality of storages whose temperature can be individually set is provided. It is also possible to provide a product temperature sensor and a product temperature calculating means for each storage.

In this embodiment, the product temperature detecting device 1
0 and the thawing / heating cooking device group 15a, 1
5b, 15c, and 15d were connected by wire, but regardless of this, the thaw / cooking / cooking apparatus group 15a, 1 was wirelessly connected.
The temperature of the food may be transmitted to 5b, 15c, and 15d, or the detected internal temperature of the food may be displayed on a display, and the operator looks at the display and displays the food temperature on the thawing / heating cooking device. By inputting, the detected internal temperature of the food may be passed to the thawing / heating cooking device.

Further, in the product temperature output means 14 of this embodiment, the A product temperature calculating means 13a and the B product temperature calculating means 13
The method of selectively outputting the internal temperature of the food calculated by b is, for example, a method of extracting the food from the refrigerator 1
May be selected depending on which door of the A store 2a or the B store 2b is opened or closed.
Information may be bidirectionally exchanged between the refrigerators 1a, 15b, 15c, 15d and the refrigerator 1 for selection.

Further, in this embodiment, the thawing / heating apparatus and the freezing refrigerator are separately provided, but if necessary, a dedicated thawing / heating apparatus may be incorporated in the freezer as an integral type. is there.

As described above, the refrigerator-freezer with an article temperature detecting device according to the present embodiment is different from the refrigerator-freezer 1 provided with a plurality of storages 2a and 2b in which the temperatures inside the storages can be set separately. And temperature sensors 11a, 11b, 11c, 11 for detecting the ambient temperature of the stored food.
d, storage means 12 for storing the heat transfer characteristics of the stored foods 9a, 9b, and product temperature sensors 11a, 11b, 11c,
11d and the ambient temperature of the food detected by the storage means 12
And temperature calculating means 13a and 13b for calculating the internal temperature of the food from the heat transfer characteristics of the food stored in the storage device. The internal temperature of the stored food 9a and 9b is detected, and the detected internal temperature of the food is detected. To the cooking devices 15a, 15b, 15c, 1
5d, based on the internal temperature of the food and the surface temperature of the food detected by the cooking device, it is possible to perform optimal thawing and cooking with the cooking device.

As a result, even when the temperature difference between the internal temperature and the surface temperature of the food is large, it is possible to always provide a good finished food without over-thawing or insufficient thawing, and without overheating or insufficient heating. .

The article temperature sensor is connected to the storages 2a and 2b.
Food 9 installed and stored in the circulating air at the top of the warehouse
Upper temperature sensors 11a, 11c for detecting the ambient temperature above the a, 9b, and lower temperature sensors 11b, installed on the bottom surfaces of the storages 2a, 2b, for detecting the temperature of the bottom surfaces of the stored foods 9a, 9b. 11d, the article temperature sensors 11a, 11b, 11c, 11d are not bulky and compact, and the insides of the storages 2a, 2b are not narrowed.

Further, according to the present method, it is possible to realize a food temperature detecting device which is non-contact with food and has good responsiveness, and even if the type of food changes, only by changing the storage contents of the storage means 12. It is possible to provide a highly versatile product temperature detection device that is compatible, does not require changing or adjusting the product temperature sensor, and can detect the temperature of different types of foods with one type of sensor.

Further, in the refrigerator with the article temperature detecting device according to the present embodiment, the storage temperatures of the plurality of storages 2a and 2b can be set separately, so that the storage temperature of some of the storages is previously set to the partial temperature (-3 ° C.). By switching to (3), a part of the food that has been frozen and stored is thawed to a partial temperature in advance by a necessary amount, whereby the time required for thawing and cooking by heating can be reduced.

For example, when a frozen lunch is to be thawed and cooked and sold, the set temperature is switched the night before and the thaw is previously thawed to the partial temperature in anticipation of sales at lunch the next day. From a frozen state, the time required for thawing and cooking to take 2 minutes can be reduced to half, eliminating loss of sales opportunities and increasing sales.

[0069]

As described above, the present invention comprises a storage which can store food by freezing or refrigeration, and is provided in the storage to detect the ambient temperature of the stored food. And storage means for storing the heat transfer characteristics of the stored food; the ambient temperature of the food detected by the product temperature sensor; and the heat transfer characteristics of the food stored by the storage means, the internal temperature of the food. And a product temperature output device for outputting the internal temperature of the food calculated by the product temperature calculation device. The product temperature output device of the product temperature detection device outputs A freezing refrigerator with a product temperature detecting device, characterized in that the temperature of the food is received and the thawing and cooking is performed by a thawing / heating cooking device, the internal temperature of the stored food is detected, and the detected food is detected. Defrosting heating inside temperature The temperature difference between the internal temperature of the food and the surface temperature is determined by performing optimal thawing and cooking with the thawing / heating cooking device based on the internal temperature of the food and the surface temperature of the food detected by the thawing / heating cooking device. Is large, there is no over-thawing or lack of thawing, and there is no overheating or lack of heating.

The product temperature sensor of the product temperature detecting device is
A lower temperature sensor installed on the bottom surface of the storage to detect the bottom surface temperature of the stored food; and an upper temperature sensor installed in the circulating air at the top of the storage and detecting the upper ambient temperature of the stored food. The product temperature sensor is not bulky, compact, and does not make the storage space narrow.

Further, the storage means of the article temperature detecting device includes an upper overall heat transfer coefficient from the upper atmosphere of the food to the inner center of the food, a lower overall heat transfer coefficient from the bottom of the food to the inner center of the food, The upper surface area of the food, the lower surface area of the food, and the heat capacity of the food are stored, and the product temperature calculating means is
The method is characterized in that the internal temperature of the food is calculated from the detected value of the product temperature sensor and the content stored in the storage means. A temperature detecting device can be realized. Further, even if the type of food changes, it is possible to cope with it only by changing the storage contents of the storage means, and it is not necessary to change or adjust the product temperature sensor. A highly versatile product temperature detection device capable of detection can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a refrigerator-freezer with a product temperature detecting device according to an embodiment of the present invention.

FIG. 2 is a heat transfer model diagram of the food to show the heat transfer characteristics of the food of the embodiment.

FIG. 3 is a flowchart for explaining the operation of the embodiment;

FIG. 4 is a front sectional view of a cooking device using a conventional product temperature detection technique.

FIG. 5 is a configuration diagram of a product temperature sensor installed in a conventional storage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator-freezer 2a, 2b Storage 3 Cooling means 4a, 4b Internal temperature sensor 5a, 5b Internal temperature detecting means 6a, 6b Internal temperature setting means 7a, 7b Internal temperature judging means 8a, 8b Cooling control means 9a, 9b Food 10 Product temperature detecting device 11a, 11b, 11c, 11d Product temperature sensor 12 Storage means 13a, 13b Product temperature calculating means 14 Product temperature output means 15a, 15b, 15c, 15d Defrosting heating cooking device

Claims (3)

[Claims] An article temperature sensor for detecting an ambient temperature of stored food, comprising: a storage capable of storing frozen food in a frozen or refrigerated state; Storage means for storing thermal characteristics, the ambient temperature of the food detected by the food temperature sensor, from the heat transfer characteristics of the food stored in the storage means, the product temperature calculation means for calculating the internal temperature of the food, A food temperature output device that outputs the internal temperature of the food calculated by the food temperature calculation device; and a food temperature detection device that receives the food temperature output from the food temperature output device of the food temperature detection device. A freezing refrigerator with a product temperature detecting device, wherein thawing and heating cooking is performed by a thawing heating cooking device. 2. An article temperature sensor of the article temperature detecting device is installed on a bottom surface of the storage, and a lower temperature sensor for detecting a bottom temperature of the stored food, and is installed in circulating air at an upper part of the article. 2. The refrigerator according to claim 1, further comprising an upper temperature sensor for detecting an upper ambient temperature of the stored food. 3. The storage means of the article temperature detecting device comprises: an upper overall heat transfer coefficient from an upper atmosphere of the food to an inner center of the food; a lower overall heat transfer coefficient from a bottom of the food to an inner center of the food; The upper surface area of the food, the lower surface area of the food, and the heat capacity of the food are stored, and the product temperature calculating unit calculates the internal temperature of the food from the detected value of the product temperature sensor and the storage content of the storage unit. The refrigerator according to claim 1, wherein the refrigerator is operated.