JP2003148860A - Food temperature display freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a freezer which enables an operator to rapidly cope with the temperature rise of stored food by detecting the temperature of the food, and by displaying the temperature and temperature rise level of the food, and has an unbulky and compact food temperature sensor without narrowing the interior of a storage chamber. SOLUTION: In the freezer 1 provided with the storage chamber 2 that freezes and stores food, the internal temperature of the food is computed by a food temperature computing means 11 from the ambient temperature of the food detected by the food temperature sensors 9a, 9b, and the heat transfer characteristic of the food stored in a storage means 10, and the internal temperature of the food is displayed on a food temperature display means 12, while the temperature rise level of the food is displayed on a temperature rise level display means 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects the temperature of food and displays the temperature of the food and the temperature rise level so that the temperature of the stored food can be increased. In addition, the present invention relates to a freezer that can always obtain an optimum defrosting finished state by switching the defrosting program of the defroster when defrosting stored food.

[0002]

2. Description of the Related Art During storage of food, the temperature of the food is detected,
For the technology to control the temperature of foods accordingly,
For example, it is disclosed in Japanese Patent Laid-Open No. 7-225875.

The above-mentioned conventional article temperature detecting technique will be described below with reference to the drawings.

FIG. 9 shows a perspective view of a conventional article temperature sensor installed in a storage. In FIG. 9, a temperature sensor 91 includes a thermistor body 92 and an epoxy resin 9 surrounding the thermistor body 92.
It is composed of three. The epoxy resin 93 measures the heat capacities of the thermistor body 92 and the food, and sequentially winds the thermistor body 92 while adjusting the rate of change of the detected temperature per unit elapsed time so that the heat capacity becomes the same as that of the food.
The temperature detected by the product temperature sensor 91 and the temperature of the food are made equal.

[0005]

However, in the above-mentioned conventional example, since the specific heat of the epoxy resin 93 surrounding the thermistor main body 92 of the article temperature sensor 91 is small, in order to match the heat capacity of the food depending on the type of food. However, there is a drawback that a large amount of epoxy resin 93 is required, the product temperature sensor 91 itself becomes large, and the inside of the storage compartment becomes narrow. Further, there is a drawback in that it is necessary to change the product temperature sensor 91 or adjust the heat capacity depending on the type of food.

The present invention solves the conventional problems. The product temperature sensor is not bulky, is compact, and even if the type of food is changed, it is not necessary to change or adjust the product temperature sensor. Using the product temperature detection technology that can detect the temperature of food with one type of sensor, the temperature of food is detected, and the temperature and temperature rise level of the food is displayed to respond to the temperature rise of the stored food. The object is to provide a freezer that enables

[0007]

SUMMARY OF THE INVENTION The invention according to claim 1 of the present invention is a freezer provided with a storage capable of freezing and storing food, and an article temperature sensor for detecting an ambient temperature of the food, and a food. A storage means for storing the heat transfer characteristic of the food, an ambient temperature of the food detected by the product temperature sensor, and a heat transfer characteristic of the food stored in the storage means for calculating an internal temperature of the food. Means, an article temperature display means for displaying the temperature of the food product calculated by the article temperature calculation means, and a temperature increase level for displaying the temperature increase level of the food temperature calculated by the article temperature calculation means from the normal freezing temperature. It is a product temperature display freezer having a temperature level display means, the product temperature sensor is not bulky, is compact, and does not narrow the inside of the storage,
By detecting the temperature of the food and displaying the temperature of the food and the temperature rise level, it is possible to cope with the temperature rise of the stored food.

Furthermore, even if the type of food is changed, it is possible to deal with it by simply changing the stored contents of the storage means, and it is not necessary to change or adjust the product temperature sensor. It has the effect that it can be detected by the sensor.

The invention according to claim 2 is characterized in that the temperature rise level display means divides the temperature rise value from the normal freezing temperature into a plurality of ranges and displays the corresponding range name. The product temperature display freezer described in 1, by dividing the temperature rise value from the normal freezing temperature into a plurality of ranges, the dangerous level of temperature rise of frozen foods is defined stepwise and the corresponding range name is displayed. This has the effect of making it easier for the operator to recognize the danger level of temperature rise and enabling quick response to the temperature rise of stored food.

According to a third aspect of the invention, the temperature rise level display means divides the temperature rise value from the normal freezing temperature into a plurality of ranges and displays the corresponding range name. The range of the temperature rise value displayed by the temperature level display means corresponds to the defrosting program of the defroster when defrosting the stored food, and the display of the corresponding range name is the defrosting program number. 1 is a product temperature display freezer, in which an operator inputs the defrosting program number displayed by the temperature rise level display means into a defroster in which the defrosting program can be switched in advance according to the temperature rise level, thereby raising the temperature of food. It is possible to always obtain the optimum defrosted finished state without being affected by.

According to a fourth aspect of the present invention, the product temperature display means and the temperature increase level display means are the same indicator, and the product temperature display and the temperature increase level display are alternately performed. Item 1. The product temperature display freezer according to item 1, wherein the product temperature display means and the temperature rise level display means are combined into a single display to facilitate the operator's recognition of the temperature rise level and raise the stored food. It has the effect of enabling prompt response to temperature.

The invention according to claim 5 is an article temperature sensor,
2. The product temperature display freezer according to claim 1, wherein a plurality of storage units, a product temperature calculation unit, a product temperature display unit, and a temperature rise level display unit are provided for each of the plurality of storages. It has the effect of enabling each storage to cope with the temperature rise of the stored food and also enabling the storage of different kinds of food for each storage.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a product temperature display freezer according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing the structure of a product temperature display freezer according to an embodiment of the present invention, and FIG. 2 is a heat transfer model diagram of food for showing heat transfer characteristics of food. FIG. 3 is a flow chart for explaining the operation of the same embodiment.

In FIG. 1, reference numeral 1 denotes a freezer, which has a storage 2 capable of storing foods in a frozen state. Reference numeral 3 denotes a cooling means for cooling the inside of the refrigerator, which circulates cooled air (hereinafter, abbreviated as cold air) in the refrigerator. Reference numeral 4 is an internal temperature sensor provided in the storage 2. Reference numeral 5 denotes an in-compartment temperature detecting means for detecting the in-compartment temperature by the in-compartment temperature sensor 4. Reference numeral 6 is an internal temperature determination means for determining whether or not the internal temperature detected by the internal temperature detection means 5 exceeds a set temperature of the internal temperature, and 7 is an internal storage based on the determination result of the internal temperature determination means 6. It is a cooling control means for controlling the cooling inside.

Numeral 8 is a food item stored in the refrigerator.

Reference numerals 9a and 9b denote article temperature sensors which are installed at positions facing each other with the food 8 sandwiched between them and detect the ambient temperature of the stored food 8. An upper temperature sensor for detecting the upper atmosphere temperature of the installed and stored food 8, 9b is a lower temperature sensor for detecting the lower atmosphere temperature of the stored food 8 installed in the circulating air in the lower part of the refrigerator. is there.

Reference numeral 10 is a storage means for storing the heat transfer characteristics of the stored food 8.

An item 11 calculates the internal temperature of the food 8 from the ambient temperature of the food 8 detected by the upper temperature sensor 9a and the lower temperature sensor 9b and the heat transfer characteristics of the food 8 stored in the storage means 10. It is a temperature calculation means.

Reference numeral 12 is a product temperature display means for displaying the temperature of the food product calculated by the product temperature calculation means 11.

Reference numeral 13 is a temperature rise level display means for displaying the temperature rise level of the food temperature calculated by the product temperature calculation means 11 from the normal freezing temperature, which is the normal freezing temperature (-20).
The temperature rise value from (° C) is divided into a plurality of ranges and the corresponding range name is displayed. For example, since the temperature of frozen foods is defined as -15 ° C or lower in the "Japan Standard Commodity Classification" of the Administrative Agency, the temperature rise value from the normal freezing temperature (-20 ° C) is 0K to 5K (ie, , Food temperature is -20 ℃ ~
When the temperature is -15 ° C, the range name is "Level 1", and the temperature rise value is 6K to 10K (that is, the food temperature is -14 ° C to -10).
(° C), the range name is "Level 2" and the temperature rise value is 11
When the temperature exceeds K (that is, the food temperature is -11 ° C or higher), the range name is displayed as "Level 3".

FIG. 2 is a heat transfer model diagram of the food for showing the heat transfer characteristics of the food stored in the storage means 10. As food for which the internal temperature is to be detected, for example, frozen food such as frozen gratin, which is frozen and stored in a plastic container, will be taken up.

In FIG. 2, 31 is a gratin and 3
Reference numeral 2 is a container of heat-resistant resin in which the gratin 31 is placed. And 33 is an upper lid of the resin for dust protection. T1 is the upper atmosphere temperature of the food, T2 is the lower atmosphere temperature of the food, T3 is the internal temperature of the food to be detected this time, which is the temperature of the internal center of the food indicated by the 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 upper overall heat transfer coefficient of the food,
It is a value derived from the heat transfer coefficient of air from the upper atmosphere of the food to the inner center of the food, the heat conductivity of the upper lid 33, and the heat conductivity of the gratin 31.

K2 is the lower overall heat transfer coefficient of the food,
It is a value derived from the heat transfer coefficient of air from the lower atmosphere of the food to the inner center of the food, the heat conductivity of the container 32, and the heat conductivity of the gratin 31.

C is the heat capacity of the food, and most of it is the gratin 31 in this embodiment, which is a value derived from the product of the specific heat of gratin and the weight.

The storage means 10 stores an upper overall heat transfer coefficient K1 and a lower overall heat transfer coefficient K2 of the food, an upper surface area A1 and 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 entering heat ΔQ per unit time
1 and ΔQ2 are respectively expressed by the following equations.

ΔQ1 = K1A1 (T1−T3) ΔQ2 = K2A2 (T2−T3) Therefore, if 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. Since it is the sum of the amount of heat of penetration of

ΔQ = ΔQ1 + ΔQ2 = (K1A1T1 +
K2A2T2)-(K1A1 + K2A2) T3 The total intrusion heat amount ΔQ per unit time is represented by a differential value of the total intrusion heat amount Q with respect to time t.

Further, since the internal temperature T3 of the food having the heat capacity C rises due to the amount of heat Q entering, ΔQ = dQ / dt = C · dT3 / dt is expressed. Therefore, C · dT3 / dt = (K1A1T1 + K2A2T2) −
(K1A1 + K2A2) T3, and the solution of this differential equation is represented by (Equation 1), where T0 is the initial value of the internal temperature T3 of the food.

[0033]

[Equation 1]

Further, even when the food is cooled and the temperature is lowered, by setting Q as the amount of heat released from the food,
The same formula as (Equation 1) is obtained.

The product temperature calculation means 11 sets the upper atmosphere temperature of the food 8 detected by the upper temperature sensor 9a to T1, and the lower atmosphere temperature of the food 8 detected by the lower temperature sensor 9b to T2, and the storage means 8 stores the data. From the heat transfer characteristics K1, K2, A1, A2, C of the food 8 being processed, the internal temperature T3 of the food 8 is calculated according to (Equation 1).

The initial value T0 of the internal temperature T3 of the food is
Assuming that the temperature when the food is first put in the storage is the freezing temperature (for example, -20 ° C), by repeating the calculation according to (Equation 1), even if there is an error in the initial value, the internal The temperature T3 converges to a true value.

The operation of the product temperature display freezer configured as described above will be described below with reference to FIGS. 1, 2, and 3.

In FIG. 3, first of all, the inside temperature detecting means 5
Detects the internal temperature of the storage 2 by the internal temperature sensor 4 (Step 1).

Then, the in-compartment temperature determination means 6 determines whether or not the in-compartment temperature detected by the in-compartment temperature detection means 5 exceeds the set temperature of the in-compartment temperature (Step 2).
As a result, when the inside temperature is higher than the set temperature of the inside temperature, the cooling control means 7 circulates the cool air produced by the cooling means 3 in the storage 2 (Step 3). When the inside temperature is lower than the set temperature of the inside temperature, the cooling control means 7 shuts off the cool air in the storage 2 (Step 4).

Next, the upper temperature sensor 9a detects the upper atmosphere temperature T1 of the food 8, and the lower temperature sensor 9b detects the food 8.
The lower atmosphere temperature T2 of is detected (Step 5).

The product temperature calculation means 11 is the storage means 1
0 memorizes the heat transfer characteristics of food 8, K1, K2, A1,
The internal temperature T3 of the food 8 is calculated from A2 and C according to (Equation 1) (Step 6). As a result, the storage 2
The temperature fluctuations of the food 8 due to the opening and closing of the door, etc. are accurately detected. Then, the product temperature display means 12 displays the food temperature calculated by the product temperature calculation means 11 (Step 7).

The temperature rise level display means 13 displays the temperature rise level of the food temperature calculated by the product temperature calculation means 11 from the normal freezing temperature (-20 ° C.). That is, when the food temperature is -20 ° C to -15 ° C, the range name is “Level”.
"1" is displayed (Step 8) and the food temperature is -14 ° C ~
When the temperature is -10 ° C, the range name "Level 2" is displayed (S
otherwise, display the range name "Level 3" assuming that the food temperature is -11 ° C or higher (Step 1).
0). Then, the process returns to Step 1.

As described above, the operation of Step 1 to Step 10 detects the temperature of the food and displays the detected temperature and the temperature rise level of the food.

Although the food temperature detecting method of the present embodiment has an error in the initial value T0 of the internal temperature T3 of the food, the food temperature converges to a true value after a certain period of time. With 250 g of gratin, the time constant τ is about 1 hour, and the initial value T0 of the internal temperature T3 is initially 10
Even if there is an error in ° C, by repeating the calculation according to (Equation 1), the error converges within 0.5 ° C within 3 hours, and the accuracy is satisfactory as a practical product temperature detection method. For example, in a restaurant or the like, if the operator stores new food in the freezer 1 before closing at 10:00 pm, the food temperature is correctly detected and displayed and the product temperature is controlled in the morning.

Further, in the present embodiment, two product temperature sensors for detecting the ambient temperature of the food are provided around the food 8. However, in order to improve the accuracy of product temperature detection, the number of sensors is further reduced. The number may be increased, or one item temperature sensor may be used as long as the ambient temperature of the food can be equalized.

As described above, the product temperature display freezer of this embodiment has the product temperature sensors 9a, 9a for detecting the ambient temperature of the food.
b, the storage means 10 for storing the heat transfer characteristics of the food, the ambient temperature of the food detected by the article temperature sensor, and the heat transfer characteristics of the food stored in the storage means to calculate the internal temperature of the food. Product temperature calculation means 11 and a product temperature display means 12 for displaying the temperature of the food product calculated by the product temperature calculation means 11.
And a temperature rise level display means 13 for displaying the temperature rise level of the food temperature calculated by the product temperature calculation means from the normal freezing temperature, and the temperature rise of the food temperature from the normal freezing temperature. By dividing the value into multiple ranges, the danger level of temperature rise of frozen foods is defined in stages, and by displaying the corresponding range name, the operator can easily recognize the danger level of temperature rise and storage It enables quick response to the temperature rise of the food being processed.

For example, when the temperature of the food rises, the operator can suppress the temperature rise of the food by promptly opening and closing the door of the freezer.

The product temperature sensor is arranged in the circulating air in the upper part of the inside of the storage 2 and is an upper part temperature sensor for detecting the ambient temperature of the upper part of the stored food product 8a.
And a product temperature sensor 9b which is a lower temperature sensor installed in the circulating air in the lower part of the storage 2 and detecting the ambient temperature of the lower part of the stored food 8.
The product temperature sensors 9a and 9b are not bulky, are compact, and do not narrow the inside of the storage 2.

In addition, the present product temperature detection method enables the product temperature to be detected in a non-contact and highly responsive manner, and the stored contents of the storage means 10 are changed even if the type of food is changed. Therefore, it is possible to realize the product temperature detection with high versatility, which does not require the change or adjustment of the product temperature sensors 9a and 9b and can detect the temperature of different kinds of foods with one type of sensor.

(Second Embodiment) Next, another embodiment will be described with reference to the drawings. The first embodiment
The same components as those of 1 are assigned the same reference numerals and detailed description thereof will be omitted.

FIG. 4 is a block diagram showing the structure of the product temperature display freezer according to the second embodiment of the present invention, and FIG. 5 is a flow chart for explaining the operation of the same embodiment.

In FIG. 4, the configuration in which reference numerals 1 to 12 are given is common to the first embodiment.

Reference numeral 14 denotes a temperature rise level display means (defrosting program number display) for displaying the temperature rise level of the food temperature calculated by the product temperature calculation means 11 from the normal freezing temperature, and the normal freezing temperature (-20 The temperature rise value from (.degree. C.) is divided into a plurality of ranges corresponding to the defrosting program of the defroster when defrosting the stored food, and the corresponding defrosting program number is displayed. For example, the normal freezing temperature (-2
Temperature rise value from 0 ° C to 0K to 5K (that is, food temperature is-
Defrosting program number “00
1 ", the temperature rise value is 6K to 10K (that is, the food temperature is -14
Defrosting program number “002” when
When the temperature rise value exceeds 11K (that is, the food temperature is -11 ° C or higher), the defrosting program number "003" is displayed.

The operation of the product temperature display freezer configured as described above will be described below with reference to FIGS. 4 and 5.

In FIG. 5, Step 1 to Step 7 are common to the first embodiment.

Then, the temperature rise level display means (defrosting program number display) 14 displays the proper defrosting program number of the defroster when defrosting the stored food. That is, when the food temperature is -20 ° C to -15 ° C, the defrosting program number "001" is displayed (Step 11), and the food temperature is -1.
When the temperature is between 4 ° C and -10 ° C, the defrosting program number “002” is displayed (Step 12).
The defrosting program number “003” is displayed when the temperature is 11 ° C. or higher (Step 13). Then, the process returns to Step 1.

As described above, the temperature of the food is detected by the operations of Step 1 to Step 13, and the detected temperature of the food and the proper defrosting program number of the defroster for defrosting the stored food are displayed.

As described above, the product temperature display freezer of the present embodiment has the temperature rising level display means (defrosting) for displaying the temperature rising level of the food temperature calculated by the product temperature calculation means from the normal freezing temperature. A program number display) 14 is provided, and a plurality of values corresponding to the defrosting program of the defroster for defrosting stored foods are used for increasing the temperature rise of foods from the normal freezing temperature (-20 ° C). By displaying the corresponding defrosting program number by dividing into ranges, the operator inputs the defrosting program number displayed by the temperature rise level display means (displaying the defrosting program number) 14 into the defroster to perform defrosting, and It has an effect that it is possible to always obtain the optimum thawing finish state without being affected by the temperature rise.

(Third Embodiment) Next, another embodiment will be described with reference to the drawings. The first embodiment
The same components as those of 1 are assigned the same reference numerals and detailed description thereof will be omitted.

FIG. 6 is a block diagram showing the structure of the product temperature display freezer according to the third embodiment of the present invention, and FIG. 7 is a flow chart for explaining the operation of the same embodiment.

In FIG. 6, the configuration in which reference numerals 1 to 11 are given is common to the first embodiment.

Reference numeral 15 is a common display means for alternately displaying the product temperature display and the temperature rise level display.

The operation of the product temperature display freezer configured as described above will be described below with reference to FIGS. 6 and 7.

In FIG. 7, Step 1 to Step 6 are common to the first embodiment.

The common display means 15 displays the food temperature calculated by the product temperature calculation means 11 (Ste).
p21). Then, a waiting time (for example, 1 second) is performed (Step 22).

Next, the common display means 15 is the product temperature calculation means 1
The temperature rise level of the food temperature calculated by 1 from the normal normal freezing temperature (−20 ° C.) is displayed. That is, when the food temperature is -20 ° C to -15 ° C, the range name is “Level”.
"1" is displayed (Step 23), and the food temperature is -14 ° C ~
When the temperature is -10 ° C, the range name "Level 2" is displayed (S
otherwise, display the range name "Level 3" assuming that the food temperature is -11 ° C or higher (Step 24).
25). Then, wait for a time (for example, 1 second) (S
(Step 26). Then, the process returns to Step 1.

As described above, the temperature of the food is detected by the operations of Step 1 to Step 26, and the detected temperature and the temperature rise level of the food are alternately displayed on the common display means 15 every one second.

As described above, the product temperature display freezer according to the present embodiment is provided with the common display means 15 for alternately displaying the product temperature display and the temperature rise level display. By alternately performing the product temperature display means and the temperature rise level display means with one display, the operator can easily recognize the temperature rise level, and can quickly respond to the temperature rise of the stored food. It has the effect of enabling correspondence.

Further, by using one display for both the product temperature display means and the temperature rise level display means, there is an effect that the cost for the construction can be reduced.

(Fourth Embodiment) Next, another embodiment will be described with reference to the drawings. The first embodiment
The same components as those of 1 are assigned the same reference numerals and detailed description thereof will be omitted.

FIG. 8 is a block diagram showing the structure of a product temperature display freezer according to the fourth embodiment of the present invention.

In FIG. 8, the configuration with reference numerals 1 to 13 is common to the first embodiment.

Reference numeral 2'is a second storage which is provided below the storage 2 of the freezer 1 and which has an independent opening / closing door and is capable of storing food in a frozen state.

Reference numeral 8'denotes a food item stored in the second storage 2 '.

Reference numerals 9a 'and 9b' are second product temperature sensors installed in the second storage 2'in a position opposite to each other with the food 8'in-between to detect the ambient temperature of the stored food 8 '. is there.

Reference numeral 10 'is a second storage means for storing the heat transfer characteristics of the stored food 8'.

Reference numeral 11 'denotes the ambient temperature of the food 8'detected by the second product temperature sensors 9a', 9b 'and the second storage means 1.
From the heat transfer characteristics of the food 8'which 0'remembers, the food 8 '
It is a second product temperature calculation means for calculating the internal temperature of the.

Reference numeral 12 'is a second product temperature display means for displaying the temperature of the food product calculated by the second product temperature calculation means 11'.

Reference numeral 13 'is a second temperature increase level display means for displaying the temperature increase level of the food temperature calculated by the second product temperature calculation means 11' from the normal freezing temperature. The temperature rise value from 20 ° C) is divided into a plurality of ranges,
The corresponding range name is displayed. When the temperature rise value from the normal freezing temperature (-20 ° C) is 0K to 5K (that is, the food temperature is -20 ° C to -15 ° C), the range name is " Level
1 ", the temperature rise value is 6K to 10K (that is, the food temperature is -1
The range name is displayed as “Level 2” when the temperature is 4 ° C. to −10 ° C., and the range name is displayed as “Level 3” when the temperature rise value exceeds 11K (that is, the food temperature is −11 ° C. or higher). is there.

The operation of the product temperature display freezer configured as described above is the same as the operation of the first embodiment described with reference to FIG.

The second storage 2'is the same as the operation of Step 5 to Step 10 of the first embodiment described in FIG.

As described above, the product temperature display freezer of the present embodiment has the plurality of storages 2 and 2 ', and the product temperature sensor,
A plurality of storage means, article temperature calculation means, article temperature display means, and temperature rise level display means are provided for each of the plurality of storages 2 and 2 ', and for each of the plurality of storages 2 and 2'. By detecting the food temperature, displaying the product temperature, and displaying the temperature rise level, it is possible to respond to the temperature rise of the stored food in each of the plurality of storages 2 and 2'and different types for each storage. It also has the effect of enabling the storage of foods.

[0083]

As described above, the invention described in claim 1 is
In a freezer provided with a storage capable of freezing and storing food, a temperature sensor for detecting the ambient temperature of the food,
A storage unit for storing heat transfer characteristics of food, an ambient temperature of the food detected by the product temperature sensor, and a heat transfer characteristic of the food stored in the storage unit for calculating an internal temperature of the food. A calculation unit, a product temperature display unit that displays the temperature of the food product calculated by the product temperature calculation unit, and a temperature rise level of the food temperature calculated by the product temperature calculation unit from the normal freezing temperature It is a product temperature display freezer having a temperature rise level display means, the product temperature sensor is not bulky, is compact, detects the temperature of food without narrowing the inside of the storage, and detects the temperature and temperature of food. By displaying
Enables handling of temperature rise of stored food. Furthermore, even if the type of food is changed, it can be dealt with only by changing the stored content of the storage means, and it is not necessary to change or adjust the product temperature sensor. It can be detected.

Further, the invention according to claim 2 is characterized in that the temperature rise level display means divides the temperature rise value from the normal freezing temperature into a plurality of ranges and displays the corresponding range name. The product temperature display freezer according to claim 1, wherein the temperature rise level of the frozen food is defined stepwise by dividing the temperature rise value from the normal freezing temperature into a plurality of ranges, and the corresponding range name. By displaying, the operator can easily recognize the danger level of the temperature rise, and can promptly respond to the temperature rise of the stored food.

In the invention according to claim 3, the temperature rise level display means divides the temperature rise value from the normal freezing temperature into a plurality of ranges and displays the corresponding range name. The range of the temperature rising value displayed by the temperature rising level display means corresponds to the defrosting program of the defroster when defrosting the stored food, and the display of the corresponding range name is the defrosting program number. The product temperature display freezer according to claim 1, wherein the operator inputs the defrosting program number displayed by the temperature rise level display means into a defroster capable of switching the defrosting program in advance according to the temperature rise level. It is possible to always obtain the optimum thawing finish regardless of the temperature rise.

Further, the invention according to claim 4 is characterized in that the article temperature display means and the temperature rise level display means are the same indicator and alternately perform the article temperature display and the temperature rise level display. The product temperature display freezer according to claim 1, wherein one display serves as both the product temperature display means and the temperature increase level display means,
This makes it easier for the operator to recognize the temperature rise level and enables quick response to the temperature rise of the food being stored.

According to the invention of claim 5, a plurality of article temperature sensors, storage means, article temperature calculation means, article temperature display means, and temperature rise level display means are provided for each of a plurality of storages. The product temperature display freezer according to claim 1, wherein
It is possible for each of the plurality of storages to cope with the temperature rise of the stored foods, and it is also possible to store different kinds of foods for each storage.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of a product temperature display freezer according to the present invention.

FIG. 2 is a heat transfer model diagram of food for representing heat transfer characteristics of the food according to the same embodiment.

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

FIG. 4 is a block diagram showing a configuration of Embodiment 2 of a product temperature display freezer according to the present invention.

FIG. 5 is a flowchart for explaining the operation of the same embodiment.

FIG. 6 is a block diagram showing the configuration of Embodiment 3 of the product temperature display freezer according to the present invention.

FIG. 7 is a flowchart for explaining the operation of the embodiment.

FIG. 8 is a block diagram showing a configuration of a fourth embodiment of a product temperature display freezer according to the present invention.

FIG. 9 is a perspective view of a conventional article temperature sensor arranged in a storage.

[Explanation of symbols]

1 freezer 2 storage 2'second storage 3 Cooling means 4 Internal temperature sensor 5 Internal temperature detection means 6 Internal temperature determination means 7 Cooling control means 8 food 8'food 9a, 9b Product temperature sensor 9a ', 9b' Second temperature sensor 10 storage means 10 'Second storage means 11 Product temperature calculation means 11 'Second product temperature calculation means 12 Product temperature display means 12 'Second product temperature display means 13 Temperature rising level display means 13 'Second heating level display means 14 Temperature rising level display means (defrosting program number display) 15 Common display means

Claims (5)

[Claims] 1. An article temperature sensor for detecting an ambient temperature of food, a storage means for storing heat transfer characteristics of the food, an ambient temperature of the food detected by the article temperature sensor, and the storage means. From the heat transfer characteristics of the food, a product temperature calculation means for calculating the internal temperature of the food, a product temperature display means for displaying the temperature of the food calculated by the product temperature calculation means, and a calculation by the product temperature calculation means. And a temperature rise level display means for displaying the temperature rise level of the temperature of the food from the normal freezing temperature. 2. The product temperature display freezer according to claim 1, wherein the temperature rise level display means divides the temperature rise value from the normal freezing temperature into a plurality of ranges and displays the corresponding range names. . 3. The temperature rise level display means divides the temperature rise value from the normal freezing temperature into a plurality of ranges and displays the corresponding range name, which is displayed by the temperature rise level display means. 2. The product temperature display freezer according to claim 1, wherein the range of the temperature rise value corresponds to the defrosting program of the defroster when defrosting the stored food, and the display of the corresponding range name is the defrosting program number. . 4. The product temperature display means and the temperature rise level display means are:
2. The product temperature display freezer according to claim 1, wherein the same display unit alternately displays the product temperature display and the temperature rise level display. 5. A plurality of product temperature sensors, storage means, product temperature calculation means, product temperature display means, and temperature rise level display means are provided for each of the plurality of storages. Freezer with the indicated product temperature.