JPH10234590A - Mobile warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile warmer which shows an insignificant temperature drop even when a door is operated ON/OFF during the movement of the warmer following the shutoff of power supply. SOLUTION: This mobile warmer 100 is caused to generate heat by an electric heating source 103 which warms the interior of a heat-retaining box 101 and the electric heat source 12 of a heat accumulator 10 using a power supply from a power supply plug 110. The electric heat source 103 directly warms the interior of the heat- retaining box 101 at about 80 deg.C and the electric heat source 12 heats a heat accumulating material 11 at about 30 deg.C. The mobile warmer 100 is moved under such a state that a power supply is cut off by pulling the power supply plug 110 out of a power supply outlet, and therefore, the internal temperature of the warmer 100 drops due to the ON/OFF operation of a door. The internal air of the heat-retaining box 101 is circulated through a route starting with a suction aperture and ending with a blowout aperture 18B passing through flow paths 14a-14 with the help of a ventilator 15 driven by a secondary cell. The internal air of the heat-retaining box 101 is warmed by giving a quantity of heat to the air from the heat accumulator 11, so that the loss of the heat is compensated for. Thus it is possible to retain heat for a long time. The circulating air can be brought into contact directly with the surface of the heat accumulating material 11 as an alternative choice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage (hereinafter referred to as a "hot storage" in the present invention) configured to store and keep warm foods and dishes.

[0002]

2. Description of the Related Art This type of storage is used, for example, in hospitals and the like for serving meals to nurses, and in hotels and the like for transporting food to customers. The power supply at the place where the power outlet is located, that is, the power supplied from the predetermined place is supplied with power to the electric heating source provided inside so that the power is heated, and when moving, the power supply is cut off and moved. (Hereinafter referred to as a mobile storage).

[0006] For example, the structure of a mobile storage 100 as shown in FIGS. 6 and 7 (hereinafter referred to as a first prior art).
Is a hot roll box SBZ marketed by the present applicant.
-P450H2 type and the like.

[0006] In FIGS. 6 and 7, a plurality of shelves 102 provided inside a heat insulation box 101 have a structure that can be pulled out to the front side. For example, warm food is placed and stored to keep warm.

The heat insulation box 101 is provided with a door 101A which can be opened and closed on the front side, and each wall including the door 101A is covered with a metal plate around the heat insulation material 101a. 101a is, for example, a plate-like material obtained by integrally forming an isocyanurate resin and hard polyurethane into a foam, and a metal plate on the outer periphery is a stainless steel plate on the outside and an aluminum plate on the inside.

The electric heating source 103 for heating is, for example, a planar heater formed by braiding glass fiber and a thin wire-shaped electric heating element, that is, a so-called panel heater, and a power outlet (not shown). By inserting the power plug 110 into the control panel 112 and operating the control panel 112, it is possible to perform a heating operation for heating the entire inside of the heat insulation box 101, that is, the inside of the refrigerator.

The control panel 112 is a part provided with an operation part and a display part for controlling the control unit 111 provided inside the upper cover box 105 to a required state, and includes a power switch and a temperature controller. The control unit 111 includes a knob, a temperature indicator, and the like. The control unit 111 includes a temperature detection signal detected by an internal temperature detector (not shown) provided at an appropriate location inside the heat retaining box 101 and a temperature control signal for the temperature controller. By comparing with a reference voltage corresponding to the temperature value set by the knob, and only when the temperature is lower than a predetermined temperature, by supplying power to the electric heat source 103, the inside of the refrigerator to a required temperature, for example, 80 ° C It is configured to keep.

The lower wheel 1 is used for serving meals.
When moving by the power supply 40, the user moves with the power plug 110 removed from the power outlet. For this reason, every time the door 101A is opened, such as when serving food, the temperature in the refrigerator decreases, so that it is impossible to keep the temperature for an excessively long time.

Further, the electric heat source 1 using the panel heater described above.
As a configuration using an electric heat source different from 03, as shown in FIG. 8, there is also a configuration of a mobile storage 100 using an electric heat source 103 including a sheathed heater group 103A and a blower 103B (hereinafter, referred to as a second conventional technology). It is well known.

In FIG. 8, a partition wall 107 is a metal partition wall provided inside the heat retaining box 101, and a gap 107 between the inner surface of the heat retaining box 101 and the partition wall 107.
A forms a circulation ventilation path, and a ventilation port 107B provided at a key point of the partition wall 107 forms a ventilation path that passes through in the middle.

The sheathed heater group 103A is formed, for example, by stacking a plurality of sheathed heaters each formed by enclosing an electric heating element made of a coiled nickel chrome alloy wire in a quartz glass tube in a loop shape. Ventilation is allowed to flow through the gap between each sheathed heater,
The blower 103B is, for example, a sirocco fan rotated by an electric motor, and heats the air in the refrigerator sucked from the upper ventilation port 107B by the sheathed heater group 103A and circulates in a flow indicated by an arrow.

The control unit 111 controls the electric heat source 103 to maintain the temperature in the refrigerator at a required temperature, as in the case of the first prior art shown in FIGS. And for serving meals,
The movement by the lower wheel 140 is the same as that of the first prior art.

On the other hand, when the object to be stored in the refrigerator is a cold food or a cooked product, it is necessary to keep the refrigerator at a low temperature. For example, the cool air cooled by a cooling device such as a compression refrigerator is used. As shown in FIG. 9, two ventilation holes 1
51 and 152 are provided to take in cool air (hereinafter referred to as the third
(Referred to as the prior art) is disclosed in Japanese Patent Application Laid-Open No. 62-231662 and Japanese Utility Model No. 3019972.

In FIG. 9, vents 151 and 152 are
The cooling pipes 151A and 152A connecting to the cooling device can be attached and detached. When the cooling pipes 151A and 152A are removed, the ventilation holes 151 and 152 are closed.

Further, depending on the object to be stored in the storage,
In order to switch between heating and cooling and to improve the efficiency of heating and cooling, a configuration in which a heat storage device 108 in which a heat storage material and a cold storage material are mixed is provided as shown in FIG. A fourth prior art) is disclosed in Japanese Patent Application Laid-Open No. 8-14725.

In FIG. 10, an object 109 may be an object to be heated or an object to be cooled, as the case may be. The electric heat source 103 is a Peltier element for heating or cooling by the Peltier effect. 103C, the intended heating or cooling can be performed by reversing the direction of current flow.

The regenerator 108 accumulates heat energy associated with the heating at the time of heating, and the accumulated heat amount and the electric heat source 1
The object 109 is operated so as to be heated by the heat quantity added to the heat quantity by the heating of 03, and at the time of cooling,
The thermal energy associated with the cooling is accumulated, and the object 109 is operated so as to be cooled and heated by an additive heat amount of the accumulated heat amount and the heat amount due to the cooling of the electric heat source 103.

As a configuration for obtaining an additional amount of heat using such a heat storage device, a configuration in which a heat storage device is provided near the electric heat source in a hot air blower that blows hot air by blowing air to the electric heat source is also a commercially available fan. It is well known by heaters and the like.

[0019]

The first prior art described above
In the configuration of the second related art, when moving for serving, etc., the power plug 110 is moved while being disconnected from the power outlet. Therefore, every time the door 101A is opened, the temperature in the refrigerator decreases. There is a disadvantage that the heat cannot be kept for a long time.

In order to solve this inconvenience, the fourth
It is conceivable to provide the heat storage device 108 in the related art by providing the heat storage device 108 in a refrigerator, but in such a configuration, the heat storage device 108 is not enough to obtain a heat storage amount that can be heated for a long time. Since heating must be performed to a high temperature, for example, about 100 to 200 ° C., the object 102A
The heating itself becomes more than the target value, and there is a disadvantage that it cannot be used practically.

Even if the heat accumulator 108 is sufficiently heated, the heat radiation temperature itself from the heat accumulator 108 is high,
In addition, since heat is radiated quickly, inconvenience such as inability to maintain heating for a long time occurs. For this reason, there is a problem that it is desired to provide a mobile-type storage room without such inconvenience.

[0022]

SUMMARY OF THE INVENTION According to the present invention, after the inside of a warm storage is heated by a first electric heat source using a power supplied at a predetermined place as described above, the power is shut off. In the movable storage cabinet, the air heated by flowing between the heat storage material for storing heat by the second electric heat source using the power supply and the heat insulating material layer surrounding the outer periphery of the heat storage material is heated. A first configuration in which a heat storage and heating means for arranging a heat storage unit to be supplied to the inside of the refrigerator on the bottom outer surface side of the above-mentioned storage room or on the bottom side of the above-mentioned storage room;

In addition to the first configuration, the second configuration in which the ventilation device for driving the aerator for carrying out the above-mentioned circulation by a secondary battery provided in the above-mentioned refrigerator is provided. Is solved.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, the present invention relates to a mobile warming storage 10 having the structure shown in FIGS.
An embodiment in which the present invention is applied to 0 will be described.

[0025]

An embodiment will be described below with reference to FIGS.
In FIGS. 1 to 5, portions denoted by the same reference numerals as those in FIGS. 6 to 10 are portions having the same functions as the portions denoted by the same reference numerals described with reference to FIGS. 6 to 10. 1 to 5 are portions having the same functions as the portions denoted by the same reference numerals described in any of FIGS. 1 to 5.

[First Embodiment] A first embodiment will be described below with reference to FIGS. In the configurations of FIGS. 1 to 3, the points different from the configuration of the first related art of FIGS.
First, a heat storage unit 10 having a unique configuration is provided outside the bottom portion 101E of the heat retaining box 101. Second, a secondary battery 30 is provided as an operation power supply during movement. Part. Although not shown, the regenerator 10 is located on the bottom 101E, the secondary battery 30 is located on the lower cover 130,
Each is fixed by an appropriate fixing method, for example, by screwing.

In FIG. 1 and FIG. 3, the regenerator 10 has a flow path 14 provided between a heat storage material 11 having an electric heat source 12 provided therein and a heat insulating material layer 13 surrounding the outer periphery of the heat storage material 11. The heated air that has flowed through the flow path 14 is supplied to the heat insulation box 1.
01, that is, the ventilator 15 for supplying into the storage
Is provided in the middle of the flow path 14.

Specifically, a ventilator 15, for example, a blower for rotating a sirocco fan 15A by an electric motor 15B is provided at the bottom of the inlet side cylindrical flow path 14a, and is taken in from the inlet side cylindrical flow path 14a. The air in the refrigerator is supplied to the flow path 14b on the lower surface 12b side of the heat storage material 11, the flow path 14c on the side surface 12c side of the heat storage material 11, and the flow path 14d on the upper surface 12a side of the heat storage material 11.
After that, the liquid is discharged from the outlet-side cylindrical flow path 14e. Further, a partition wall 18 is provided on the bottom side of the heat retaining box 101 to form a gap 19 with the bottom wall 101D of the heat retaining box 101, and the gap 19 is formed by the partition wall 18C on the inlet side and the outlet side. And a suction port 18A for sucking air in the refrigerator and guiding it to the inlet-side cylindrical flow passage 14a, and a heater for guiding heated air from the outlet-side cylindrical flow passage 14e into the refrigerator. The air outlet 18B is divided into a left side and a right side of the partition wall 18, respectively, so that the air in the refrigerator is circulated while being heated by these flow paths.

The heat storage material 11 has a temperature of 300 to 400 °.
C is a solid heat storage material that does not dissolve even when heated to C, for example, magnesia brick, and the heat insulating layer 13 is a heat insulating material having a heat conductivity as small as possible, for example, a brick stone brick, and has a heat conductivity of It is about 0.67 at a temperature of 300 K, and the heat storage material 11 and the heat insulating layer 13 are surrounded by a metal plate 1.
6, for example, it is formed to have a required structure by being surrounded by an aluminum plate. It is needless to say that a well-known method is used to provide a dimensional allowance so that each part is not damaged against expansion and contraction due to a change in temperature, or to allow deformation.

Then, the heat storage material 11 is divided into upper and lower portions at an intermediate portion in the thickness direction as shown by a chain line, and a groove for the electric heat source 12 is formed on each opposing surface. For example, after embedding a looped sheathed heater, the opposing surfaces are integrally formed by bonding with fire-resistant clay or the like, and, for example, a connection plug 12A is provided on the back side.

The power supply is connected by inserting a connection plug 12A into a connection socket 12B on which a power supply line 12D is wired, and then applying a protective cover 12C to the bottom 101E.
It is fixed to.

The electrical control of each part is configured as shown in FIG. In FIG. 5, a temperature detector S1 is disposed inside the heat retaining box 101, that is, at an appropriate location in the refrigerator, for example, on the inner side surface, and is used for controlling the temperature in the refrigerator. The vessel S2 is disposed at an appropriate place of the heat storage device 10, for example, on the side surface of the heat storage material 11, and is used for controlling the heat storage temperature of the heat storage material 11.

100 VA obtained from power plug 110
The C power supply includes a relay RY1 for the electric heat source 103 and an electric heat source 1
2 and a rectifier D1 for charging the secondary battery 30.
The DC power is supplied to the control unit 111 and the relay RY3 for the blower 21. When the power plug 110 is removed from the power outlet and moves, the DC power is supplied to the control unit 111.
And only the ventilator 15 operates.

The temperature of the electric heat source 103 is controlled by a temperature detector S
By controlling the relay RY1 with an output obtained by comparing the detection signal of No. 1 with a first reference voltage provided in the control unit 111, the inside of the refrigerator is heated to a required temperature, for example, about 80 ° C. The temperature control of the electric heat source 12 is performed by controlling the relay RY2 with an output obtained by comparing a detection signal of the temperature detector S2 with a second reference voltage provided in the control unit 111, so that the heat storage material 11 is controlled. Is heated to a required temperature, for example, 300 ° C.

When the power supply plug 110 is disconnected from the power supply outlet and 100 VAC is cut off, the detection signal of the temperature detector S1 is compared with a first reference voltage provided in the control unit 111 to obtain an output. By controlling the relay RY3, the air in the refrigerator led from the suction port 18A is circulated along the heat storage material 11 by the aerator 15, and then guided into the refrigerator from the outlet 18B. The temperature can be maintained at a required temperature, for example, about 80 ° C.

Therefore, it is possible to maintain the heat retention for a relatively long time even while moving for serving meals or the like.

[Second Embodiment] A second embodiment will be described below with reference to FIG. The difference between the second embodiment and the first embodiment is that, as shown in FIG.
4e is provided at a position shifted in the opposite direction from the center, so that the air discharged from the outlet-side flow path 14e is directly sucked into the inlet-side flow path 14a, and the inside of the refrigerator is heated. This is to avoid delay.

[Third Embodiment] Hereinafter, a third embodiment will be described. The difference between the third embodiment and the first embodiment is the first embodiment.
In the embodiment, the regenerator 10 is connected to the bottom 10 of the heat retaining box 101.
In the third embodiment, the heat storage unit 10 is provided on the bottom side inside the heat retaining box 101, that is, on the bottom side inside the refrigerator, although the heat storage unit 10 is arranged outside the bottom of the refrigerator. It is configured by changing to.

[Summary of the Configuration of the Embodiment] To summarize the configuration of the first, second and third embodiments, the power is supplied at a predetermined location, for example, at a location where there is a power outlet of a commercial power supply of 100 VAC. First electric heat source 10 using a power source
3. For example, after heating the inside of the warm storage, that is, the inside of the heat retaining box 101 by a panel-type heater, the above-mentioned power supply is shut off and, for example, a movable warm storage moved by wheels 140. At 100,

A heat storage material 11 for storing heat by the second electric heat source 12 using the above-mentioned power source, for example, magnesia brick, and a heat insulating material layer 12 surrounding the outer periphery of the heat storage material 11, for example, a heat insulating material made of wax brick, Between the layers, for example, the regenerator 10 that supplies heated air that flows through the flow passages 14b, 14c, and 14d into the above-described refrigerator, that is, into the inside of the heat-retaining box 101, The bottom outer surface side or the bottom side in the above-mentioned refrigerator, that is, the bottom 101E of the heat insulating box 101
Bottom 101E on the outer surface side of the inside or inside the heat insulation box 101
A first configuration in which a heat storage heating means disposed on the side is provided;

In addition to the first configuration, a ventilator 15 for carrying out the above-mentioned circulation, for example, a blower is driven by the above-mentioned storage compartment, that is, a secondary battery 30 provided in the heat-retaining box 101. This constitutes the second configuration in which the ventilation driving means is provided.

[Modification] The present invention includes the following modifications. (1) By providing the inlet side flow path 14a to the outside of the heat-retaining box 101, the air outside the heat-retainer box 101 is heated by the heat storage material 11 and supplied to the inside of the heat-retainer box 101. And change the configuration.

(2) The present invention is applied to the mobile warm storage 100 according to the second conventional technique.

(3) The mobile warm storage 100 according to the first prior art structure having the structure of the third prior art, or
The present invention is applied to a mobile storage 100 having the configuration of the second related art which also has the configuration of the third related art.

(4) The heat storage material 11 is made of refractory brick made of another material, for example, high alumina brick.

(5) Heat storage material 11 is heated to 300 to 400 ° C.
A material that dissolves by a certain degree of heating and has a relatively large latent heat, for example, a metal such as a lead-based, zinc-based, or tin-based metal or an alloy thereof, and a metal that has a relatively large thermal conductivity and does not melt by the heating , For example, housed in a stainless steel container.

(6) The heat insulating layer 13 is formed by changing to another heat insulating material such as a heat insulating material mainly composed of gypsum, silica or the like, or a heat insulating material made of firebrick made of a material different from the heat storage material 11.

(7) The metal plate 16 that covers the lower surface 12b, the side surface 12c, and the upper surface 12a of the heat storage material 11 in the flow paths 14b, 14c, and 14d is removed.
The b, side surface 12c, and upper surface 12a are configured to directly contact the flowing air.

(8) The ventilator 15 may be another type of electrically driven ventilator, for example, a fan-type ventilator that rotates a propeller-type impeller with an electric motor, or a fan that rotates a screw-type impeller with an electric motor. It is configured by changing to a shape-type aerator.

[0050]

According to the present invention, the heated air is supplied to the interior of the refrigerator by the aerator along the heat storage material of the regenerator provided on the bottom side of the storage. The heat retention can be maintained by assisting the decrease.

Further, since the outer periphery of the heat storage material is covered with a heat insulating layer having a high heat insulating property, the amount of heat stored in the heat storage material can be held without dissipating heat to unnecessary portions, so that the heat retention can be maintained for a relatively long time. There are such features.

[Brief description of the drawings]

In the drawings, FIGS. 1 to 5 show this embodiment, and FIGS.
0 indicates the prior art, and the contents of each drawing are as follows.

FIG. 1 is a longitudinal sectional view of the overall configuration.

FIG. 2 is a cross-sectional view of a main part.

FIG. 3 is a cross-sectional, longitudinal, and side view of a main part.

FIG. 4 is a plan view of a main part.

FIG. 5 is a main part circuit block diagram.

FIG. 6 is a perspective view of the overall configuration.

FIG. 7 is a longitudinal sectional view and a cross-sectional view of a main part of the overall configuration.

FIG. 8 is a vertical cross-sectional view and a main cross-sectional view of the overall configuration.

FIG. 9 is a vertical cross-sectional view of the entire configuration.

FIG. 10 is a longitudinal sectional view of the entire configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat storage unit 11 Heat storage material 12 Electric heat source 12a Upper surface 12b Lower surface 12c Side surface 12A Connection plug 12B Connection socket 12C Protective cover 13 Insulation layer 14a Inlet side cylindrical flow path 14b Flow path 14c Flow path 14d Flow path 14e Exit side cylindrical shape Flow path 15 Ventilator 15A Sirocco fan 15B Electric motor 16 Metal plate 18 Partition wall 18A Suction port 18B Blow-out port 18C Partition wall 19 Gap 30 Secondary battery 100 Mobile storage box 101 Heat insulation box 101a Insulation material 101A Door 101D Bottom wall 101E Bottom 102 Shelf 102A Target 103 Electric Heat Source 103A Sheathed Heater Group 103B Blower 103C Peltier Element 105 Upper Cover Box 107 Partition Wall 107A Gap 107B Vent 108 Heat Storage 109 Target 110 Power Plug 111 Control Unit 112 Control Panel Le 140 Wheels 151 Vent 151A Cooling pipe 152 Vent 152A Cooling pipe D1 Rectifier RY1 Relay RY2 Relay RY3 Relay S1 Temperature detector S2 Temperature detector

Claims (2)

[Claims] 1. A first method using a power supply supplied at a predetermined place.
After heating the interior of the storage compartment by the electric heat source, the movable storage compartment that moves while shutting off the power supply, wherein a heat storage material that stores heat by a second electric heat source using the power supply, A heat storage device, wherein a heat storage device for supplying heated air that flows between the heat storage material and the heat insulating material layer surrounding the outer periphery of the heat storage material to the inside of the storage is provided on the bottom outer surface side of the storage or at the bottom side of the storage. A mobile storage device comprising a heating means. 2. A first method using a power supply supplied at a predetermined location.
After heating the interior of the storage compartment by the electric heat source, the movable storage compartment that moves while shutting off the power supply, wherein a heat storage material that stores heat by a second electric heat source using the power supply, A heat storage device, wherein a heat storage device for supplying heated air that flows between the heat storage material and the heat insulating material layer surrounding the outer periphery of the heat storage material to the inside of the storage is provided on the bottom outer surface side of the storage or at the bottom side of the storage. A movable warm storage, comprising: a warming means; and a ventilation driving means for driving a ventilator for performing the circulation by a secondary battery provided in the warm storage.