JP2015016178A - Thermal insulation cabinet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and inexpensively perform the exchange of the heat generator of a thermal insulation cabinet.SOLUTION: A thermal insulation cabinet includes: a storage part 2 for storing food; and a first heat generation part 6 arranged on at least one of the bottom surface 21, left side surface 22, right side surface 23, upper surface 24, and back surface 25 of the storage part 2. The first heat generation part 6 includes: a first heat generator 61; and a first cover 62 that is removably connected to the planar heat generator and where ceramic particles are attached to the front surface. The first heat generator 61 and the first cover 62 are mutually connected by screws, etc. The first generator 61 has a planar shape and the first cover 62 has a U shape covering at least the three surfaces of the first generator 61.

Description

  The present invention relates to a heat insulating cabinet for storing articles in a state where they are kept warm.

  2. Description of the Related Art Conventionally, there is known a heat insulation cabinet for keeping warm an article that is to be stored in a certain temperature range such as sushi rice. A heating element such as a heater is used to control the temperature of the heat insulating box. Patent Document 1 discloses a heat insulating chamber in which a linear heater is provided between the heat insulating materials inside the bottom surface portion and the back surface portion of the heat insulating chamber. Further, Patent Document 2 discloses a heat insulating cabinet in which a ceramic panel heater is provided inside the side surface portion. Further, Patent Document 3 discloses a heat insulating cabinet in which a far-infrared radiation ceramic sheet is provided inside the side surface portion.

Registered Utility Model No. 3040431 Registered Utility Model No. 2582480 JP 2000-116537 A

  When a linear heater is provided between the heat insulating materials as in the heat insulating chamber disclosed in Patent Document 1, it is difficult to replace the heater. Therefore, when the heater breaks down, the main body of the heat insulating cabinet has to be discarded or the heat insulating material and the heater have to be replaced.

  When a sheet-like ceramic heater is provided as in the heat insulation chambers disclosed in Patent Document 2 and Patent Document 3, the heater can be easily replaced as compared with the heat insulation chamber described in Patent Document 1. However, if the ceramic heater failed, the entire ceramic heater had to be replaced. Since the ceramic heater is expensive, there is a problem that the cost increases when the entire ceramic heater is replaced.

  Then, this invention is made | formed in view of these points, and it aims at providing the thermal insulation which can replace | exchange a heating element easily and at low cost.

  In the present invention, it is a heat insulating chamber that keeps an article warm, and is provided in at least one of an accommodation part that accommodates an article, and a bottom surface part, a right side surface part, a left side surface part, a back surface part, and an upper surface part of the accommodation part. A heat generating part, and the heat generating part is provided with a sheet heating element, a cover that is detachably connected to the sheet heating element, and has ceramic particles attached to the surface thereof.

  The planar heating element and the cover are connected to each other by screws, for example. The planar heating element has a plate shape, and the cover covers at least three surfaces of the planar heating element. Specifically, the cover has a U-shape, for example.

  The above-mentioned heat storage is a set value in a temperature variable range of any of 36 ° C. or more and less than 95 ° C., 36 ° C. or more and less than 70 ° C., and 36 ° C. or more and less than 40 ° C. The heating value may be heated based on the set value.

  In addition, the above-described warming cabinet includes a temperature variable range of the internal temperature of the housing unit, and a set value acquisition unit that acquires a set value of the internal temperature in the temperature variable range, and the heat generating unit has a temperature variable range and a set value. The housing part may be heated on the basis.

  According to the present invention, there is an effect that the heating element can be replaced easily and at low cost.

It is a perspective view of the heat storage which concerns on 1st Embodiment. It is a front view of the heat storage which concerns on 1st Embodiment. It is AA sectional view taken on the line of the heat retention box which concerns on 1st Embodiment. It is a figure which shows the cross section of the 1st heat generating part which concerns on 2nd Embodiment. It is BB sectional drawing of the accommodating part which concerns on 1st Embodiment. It is CC sectional view taken on the line of the accommodating part which concerns on 1st Embodiment. It is a figure which shows the structure of a control unit. It is a figure which shows the cross section of the 1st heat generating part which concerns on 2nd Embodiment. It is CC sectional view taken on the line of the accommodating part which concerns on 3rd Embodiment.

<First Embodiment>
FIG. 1 is a perspective view of a warm box 1 according to the first embodiment. FIG. 2 is a front view of the heat storage 1. FIG. 3 is a cross-sectional view of the heat insulation box 1 along the line AA shown in FIG. The heat insulating chamber 1 includes a storage unit 2, an opening / closing door 4, a control unit 5, a first heating unit 6, a second heating unit 7, a third heating unit 8, and a temperature sensor 9. The heat insulation box 1 can store articles such as foods that need to be stored in the storage unit 2 in a state of being kept at a constant temperature, such as sushi rice.

  The accommodating portion 2 has a bottom surface portion 21, a left side surface portion 22, a right side surface portion 23, an upper surface portion 24, and a back surface portion 25, and has a hollow rectangular parallelepiped shape having an opening on the front side. A top plate 26 is provided on the upper surface portion 24. The bottom surface portion 21, the left side surface portion 22, the right side surface portion 23, the top surface portion 24, and the back surface portion 25 each have a stainless steel outer plate, an inner plate, and a heat insulating material provided between the outer plate and the inner plate.

  At least one of the bottom surface portion 21, the left side surface portion 22, the right side surface portion 23, the top surface portion 24, and the back surface portion 25 is provided with a heat generating portion. In the present embodiment, the first heat generating portion 6 is provided on the bottom surface portion 21, the second heat generating portion 7 is provided on the left side surface portion 22, and the third heat generating portion 8 is provided on the right side surface portion 23. The bottom surface portion 21 has a recess for providing the first heat generating portion 6.

  Between the bottom surface portion 21 and the top surface portion 24, there are provided a shelf plate 27 and a shelf plate 28 for placing articles. The shelf board 27 and the shelf board 28 can be moved back and forth along a U-shaped rail provided inside the left side surface part 22 and the right side surface part 23.

  The bottom plate 29, the left side plate 30, and the right side plate 31 are, for example, stainless steel plates. The bottom plate 29, the left side plate 30, and the right side plate 31 cover the first heat generating unit 6, the second heat generating unit 7, and the third heat generating unit 8, respectively.

  The open / close door 4 is provided on the front side of the housing portion 2 so as to be openable and closable. The open / close door 4 also has an outer plate, an inner plate, and a heat insulating material provided between the outer plate and the inner plate.

  The control unit 5 includes an operation unit 51 exposed to the outside and a control unit 52 provided inside. The operation unit 51 is provided with an input operation unit for a user of the heat storage box to input a set value of the internal temperature of the storage unit 2 and a display unit for displaying the set value. In the operation unit 51, the user can input a set value in any temperature variable range of 36 ° C. or higher and lower than 95 ° C., 36 ° C. or higher and lower than 70 ° C., and 36 ° C. or higher and lower than 40 ° C.

  For example, the operation unit 51 displays information indicating a plurality of different temperature variable ranges of 36 ° C. or higher and lower than 95 ° C., 36 ° C. or higher and lower than 70 ° C., and 36 ° C. or higher and lower than 40 ° C. When the user selects one temperature variable range from a plurality of temperature variable ranges, the operation unit 51 switches the input temperature setting value in accordance with the selected temperature variable range.

  Specifically, when the user selects a variable temperature range of 36 ° C. or more and less than 95 ° C., the operation unit 51 has a first temperature interval such as 40 ° C., 45 ° C.,. Accepts temperature setpoints in 5 ° C increments. When the user selects a variable temperature range of 36 ° C. or more and less than 70 ° C., the operation unit 51 is set to 2 ° C., which is the second temperature interval, such as 38 ° C., 40 ° C.,. Accept set values. When the user selects a variable temperature range of 36 ° C. or more and less than 40 ° C., the operation unit 51 is set at the third temperature interval such as 36.5 ° C., 37.0 ° C.,. A temperature set value is received in a unit of 0.5 ° C. By doing in this way, the user can input easily the temperature setting value selected by the appropriate fineness according to the use.

  The control unit 52 receives the temperature setting value input by the user of the heat storage in the operation unit 51, and controls the internal temperature of the storage unit 2 based on the received temperature setting value. The control unit 52 is a processor such as a CPU. The control unit 52 changes the current value that flows through the first heat generating unit 6, the second heat generating unit 7, and the third heat generating unit 8 based on the temperature setting value and the internal temperature of the housing unit 2 detected by the temperature sensor 9. Thereby, the internal temperature of the accommodating part 2 is controlled. Details of the configuration of the control unit 52 will be described later.

  The first heating unit 6 includes a first heating element 61 and a first cover 62. The first heating element 61 is, for example, a mica heater, an aluminum nitride heater, a polyimide heater, or a silicon rubber heater. The first heating element 61 is a planar heating element processed into a plate shape, and the temperature can be changed by the control of the control unit 5.

  The first cover 62 is detachably connected to the first heating element 61. The first heating element 61 and the first cover 62 are connected to each other by screws, for example. The first cover 62 is made of a ceramic-coated stainless steel plate, and ceramic particles adhere to the surface. Since the first cover 62 is coated with ceramic, when the first cover 62 is heated by the first heating element 61, the first cover 62 is an electromagnetic wave in a wavelength range that is easily absorbed by a substance such as an article accommodated in the heat insulating chamber 1. Far infrared rays are emitted.

  As shown in FIG. 3, the first heating element 61 is provided in contact with the heat insulating material inside the bottom surface portion 21. The first cover 62 has a shape that covers at least three surfaces of the first heating element 61. Specifically, the first cover 62 has a U-shape, and the first heating element 61 is in contact with three surfaces that are not in contact with the heat insulating material.

  FIG. 4 is a diagram illustrating a cross section of the first heat generating unit 6 according to the first embodiment. The second heat generating part 7 and the third heat generating part 8 have the same shape. As shown in FIG. 4, the first heating element 61 and the first cover 62 are connected by a screw 63.

FIG. 5 is a cross-sectional view of the accommodating portion 2 taken along line BB shown in FIG. That is, FIG. 5 is a view when a cross section taken along line B-B of the housing portion 2 is viewed from above.
The second heat generating unit 7 includes a second heat generating body 71 and a second cover 72. The third heat generating unit 8 includes a third heat generating body 81 and a third cover 82. Similar to the first heating element 61, the second heating element 71 and the third heating element 81 are mica heaters, aluminum nitride heaters, polyimide heaters, or silicon rubber heaters. The second heating element 71 and the third heating element 81 are planar heating elements processed into a plate shape, and the temperature can be changed under the control of the control unit 5. Similarly to the first cover 62, the second cover 72 and the third cover 82 are made of a ceramic-coated stainless steel plate, and the ceramic particles adhere to the surface.

  The first heat generating part 6, the second heat generating part 7 and the third heat generating part 8 are respectively connected to each other with a first heat generating element 61 and a first cover 62, a second heat generating element 71 and a second cover 72, and a second heat generating element. The three heating elements 81 and the third cover 82 are included. Therefore, when any of the first heating element 61, the second heating element 71, and the third heating element 81 fails, the first cover 62, the second cover 72, and the third cover 82 are discarded by removing the screws. Only the first heating element 61, the second heating element 71, and the third heating element 81 can be easily exchanged.

FIG. 6 is a cross-sectional view of the accommodating portion 2 taken along the line CC shown in FIG. That is, FIG. 6 is a view when a cross section taken along the line CC of the accommodating portion 2 is viewed from the front.
As shown in FIG. 6, the second heat generating portion 7 and the third heat generating portion 8 according to the present embodiment are arranged inside the left side surface portion 22 and the right side surface portion 23 between the bottom surface portion 21 and the top surface portion 24 of the housing portion 2. Is provided.

FIG. 7 is a diagram showing the configuration of the control unit 52. The control unit 52 includes a temperature detection unit 521, a set value acquisition unit 522, a display information output unit 523, and a temperature control unit 524.
The temperature detection unit 521 detects the internal temperature of the storage unit 2 based on temperature information acquired from the temperature sensor 9 provided inside the storage unit 2. The temperature detection unit 521 can also acquire a plurality of pieces of temperature information from a plurality of temperature sensors 9 provided at a plurality of different positions inside the housing unit 2.

  The set value acquisition unit 522 acquires a temperature set value input by the user using the operation unit 51. The display information output unit 523 outputs information to be displayed on the operation unit 51.

  Based on the temperature information indicating the internal temperature of the storage unit 2 acquired from the temperature detection unit 521 and the temperature setting value acquired by the setting value acquisition unit 522, the temperature control unit 524 is configured to generate the first heating element 61 and the second heating unit. By controlling the current flowing through the body 71 and the third heating element 81, the internal temperature of the housing portion 2 is controlled. Specifically, the temperature control unit 524 generates heat by flowing current to the first heating element 61, the second heating element 71, and the third heating element 81 when the internal temperature of the housing portion 2 is lower than the temperature setting value. And increase the internal temperature of the housing part 2. The temperature control unit 524 stops the flow of current through the first heating element 61, the second heating element 71, and the third heating element 81 when the internal temperature of the housing portion 2 is higher than the temperature setting value, and the first temperature control unit 524 By stopping the heat generation of the heating element 61, the second heating element 71, and the third heating element 81, the internal temperature of the housing portion 2 is lowered.

  The temperature control unit 524 may individually control each of the first heating element 61, the second heating element 71, and the third heating element 81 based on a plurality of temperature information detected by the plurality of temperature sensors 9. . For example, when the temperature on the left side 22 is lower than the temperature on the right side 23, the temperature control unit 524 causes the second heating element 71 to generate a larger amount of heat than the third heating element 81. The second heating element 71 and the third heating element 81 are controlled. By doing in this way, the temperature control unit 524 can make the internal temperature of the accommodating part 2 uniform.

<Second Embodiment>
FIG. 8 is a diagram illustrating a cross section of the first heat generating unit 6 according to the second embodiment. Although the first cover 62, the second cover 72, and the third cover 82 in the first embodiment have a U-shape, the shapes of the first cover 62, the second cover 72, and the third cover 82 are It is not limited to the letter shape. The shape of the first cover 62, the second cover 72, and the third cover 82 may be a square shape as shown in FIG. When the shape of the first cover 62, the second cover 72, and the third cover 82 is a square shape, the first heating element 61, the second heating element 71, and the third heating element 81 are pulled out after removing the screws. Thus, the first heating element 61, the second heating element 71, and the third heating element 81 can be easily removed.

<Third Embodiment>
FIG. 9 is a cross-sectional view of the accommodating portion 2 corresponding to FIG. 6 according to the third embodiment. In the accommodating part 2 shown in FIG. 9, the area of the 2nd heat generating part 7 and the 3rd heat generating part 8 is smaller than the area of the 2nd heat generating part 7 and the 3rd heat generating part 8 shown in FIG. 7 and the third heat generating part 8 are different from the accommodating part 2 shown in FIG. 6 in that they are provided above the accommodating part 2. The 2nd heat generating part 7 and the 3rd heat generating part 8 are provided above the shelf board 27, for example.
As described above, since the second heat generating unit 7 and the third heat generating unit 8 are provided on the upper side, heating can be performed at a position away from the first heat generating unit 6. There is an effect that the temperature is prevented from being excessively higher than other regions, and the internal temperature of the housing portion 2 is easily made uniform.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  For example, in the above-described embodiment, the second heat generating portion 7 and the third heat generating portion 8 are provided in such a direction that the second cover 72 and the third cover 82 look like a U shape when viewed from above or below. However, the second cover 72 and the third cover 82 may be provided in a state in which the second cover 72 and the third cover 82 are viewed in a U shape when viewed from the front or the rear, ie, rotated 90 degrees. In the above embodiment, the first heating element 61 and the first cover 62 are connected to each other by screws, but may be connected to each other by a member other than screws.

  In the above-described embodiment, the first heat generating portion 6 is provided on the bottom surface portion 21, the second heat generating portion 7 is provided on the left side surface portion 22, and the third heat generating portion 8 is provided on the right side surface portion 23. The location is not limited to the above example. For example, the heat insulating chamber 1 may include only the first heat generating portion 6 provided on the bottom surface portion 21, and may be provided at all locations of the bottom surface portion 21, the left side surface portion 22, the right side surface portion 23, the top surface portion 24, and the back surface portion 25. A heating part may be provided.

  In the above embodiment, the first cover 62, the second cover 72, and the third cover 82 have been described as being ceramic-coated stainless steel plates. However, the present invention is not limited to such a configuration. For example, the first cover 62, the second cover 72, and the third cover 82 may be formed of a ceramic material.

DESCRIPTION OF SYMBOLS 1 ... Insulation box 2 ... Storage part 4 ... Opening / closing door 5 ... Control part 6 ... 1st heat generating part 7 ... 2nd heat generating part 8 ... 3rd heat generating part 9- ..Temperature sensor 21 ... bottom surface portion 22 ... left side surface portion 23 ... right side surface portion 24 ... upper surface portion 25 ... back surface portion 26 ... top plate 27 ... shelf 28 ... Shelf plate 29 ... Bottom plate 30 ... Left side plate 31 ... Right side plate 51 ... Operation unit 52 ... Control unit 61 ... First heating element 62 ... First cover 63 ... Screw 71 ... second heating element 72 ... second cover 81 ... third heating element 82 ... third cover 521 ... temperature detection unit 522 ... setting value acquisition unit 523・ Display information output unit 524 ... Temperature control unit

Claims (6)

A warmer that warms items,
A storage section for storing the article;
A heat generating portion provided on at least one of the bottom surface portion, the right side surface portion, the left side surface portion, the back surface portion, and the top surface portion of the housing portion;
With
The heating part is
A planar heating element;
A cover that is detachably connected to the planar heating element and has ceramic particles attached to the surface;
Having a heat storage. The planar heating element and the cover are connected to each other by screws,
The heat storage according to claim 1. The planar heating element has a plate shape,
The cover has a shape covering at least three surfaces of the planar heating element,
The heat storage according to claim 1 or 2. The cover is U-shaped,
The heat storage according to claim 3. A setting value for acquiring a setting value in a temperature variable range of any of 36 ° C. or more and less than 95 ° C., 36 ° C. or more and less than 70 ° C., and 36 ° C. or more and less than 40 ° C. for setting the internal temperature of the housing portion. An acquisition unit,
The heat generating unit heats the housing unit based on the set value.
The heat storage box according to any one of claims 1 to 4. A temperature variable range of the internal temperature of the housing unit, and a set value acquisition unit for acquiring a set value of the internal temperature in the temperature variable range;
The heat generating part heats the accommodating part based on the temperature variable range and the set value.
The heat storage box according to any one of claims 1 to 4.

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