JP2001161513A - Electromagnetic induction heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic induction heater capable of heating a can body in which a material to be heated is contained and saving energy to improve economic efficiency by retaining and controlling it in an appropriate temperature and performing a sufficient hygienic management and omitting bothersome labor. SOLUTION: A plurality of stages of housing shelves 2 are formed in tiers in the appliance body 1. A plurality of pit-shaped holders 4 in which magnetic metal can bodies S holding materials to be heated can be separately contained are formed in the respective housing shelves 2. An electromagnetic induction coil 5 heating the can bodies S by electromagnetic induction heater is installed in each holder 4. Further, a first sensor 7 detecting presence of absence of the can body S contained in the holder 4 and a second sensor 8 detecting the appropriate temperature of the can body S are set in the appliance. The electromagnetic induction coil 5 is separately heated and the temperature is controlled by a control unit 6 in accordance with presence or non-presence of the can body S in the holder 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction heating device used for heating and maintaining the temperature of an object to be heated such as canned beverages such as coffee, tea or soup.

[0002]

2. Description of the Related Art Conventionally, in a convenience store or a station stall in an installation space where a vending machine cannot be placed,
To heat beverages in cans, they use a dedicated small showcase (can warmer) or a heating device such as a water bath.

[0003]

However, in such a conventional heating device such as a small showcase,
It is necessary to keep the heating mechanism always energized to warm the entire case and keep the product warm, even if the amount of the stored product is small. For this reason, in a 24-hour convenience store or the like, even if the power consumption is slight, the power consumption increases over a long period of time, which is economically disadvantageous. Further, even if the showcase is small, it is difficult to install it on a small counter in a store, for example.

On the other hand, in the case of using a water bath, for example, since an electric heater or gas is used as a heating means, in a small store such as a counter, a burn is easily caused by a red hot portion, and there is a danger. . Moreover, it takes time to heat and raise the temperature of the canned product to an appropriate temperature. In addition, since the temperature of the drinking water that has been raised is kept close to the temperature range in which bacteria can easily grow, sufficient hot water for preventing the growth of bacteria such as O-157, bad smell, and dirt is required for hygiene. Difficult to manage temperature. In addition, take out the canned product from the water bath,
When handing it to the buyer, it was necessary to wipe off the water droplets attached to the can body.

The present invention has been made in view of the above-mentioned circumstances, and a plurality of cans accommodating various kinds of objects to be heated are individually heated and heated, and the temperature can be controlled to be maintained at an appropriate temperature, thereby saving energy. It is an object of the present invention to provide an electromagnetic induction heating device capable of improving economic efficiency by energy conversion, performing sufficient hygiene management, and eliminating troublesome labor.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides at least one pit-like holder capable of individually storing a magnetic metal can housing a heated object. ,
Heating means for heating and raising the temperature of the can body accommodated in the holder by electromagnetic induction; a first sensor for detecting the presence or absence of the can body connected to the control means; and detecting a surface temperature of the can body When the second sensor and the first sensor detect that the can is housed in the holder, the amount of electricity supplied to the heating means is determined based on the surface temperature of the can detected by the second sensor. And a control means for heating or maintaining the temperature to a predetermined surface temperature.

The control means grasps the temperature of the object to be heated in the can body from the surface temperature of the can body detected by the second sensor, and the object to be heated reaches a desired temperature from the initial temperature. Then, it is desirable to control so that the time until the heat retention is started at the temperature is minimized. Further, a transparent cover may be provided on the upper part of the apparatus main body so as to be detachable or openable.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external view showing an entire configuration of an electromagnetic induction heating device according to the present invention, and FIG. 2 is a schematic sectional view of the same.

As shown in FIG. 1 and FIG.
Has a form in which, for example, three upper and lower storage shelves 2 are formed in the shape of a sandalwood, and a cover 3 made of a transparent plastic or the like is covered on the upper part so as to be detachable or openable. In each of the storage shelves 2 of the device body 1, for example, three pit-shaped holders 4 are arranged, and in each of these holders 4, as a heated object, for example, coffee, tea, soup, or the like Magnetic metal cans S containing various kinds of beverages and foods can be individually stored. An electromagnetic induction coil 5 as a heating means is provided at the inner bottom of each holder 4, and this electromagnetic induction coil 5 heats the cans S stored in each holder 4 by electromagnetic induction. The temperature can be raised.

Further, a control unit 6 is provided in the device body 1.
The control unit 6 includes a first sensor 7 installed in each holder 4 for detecting the presence or absence of the can S, and a second sensor 8 for detecting an appropriate temperature of the can S. And are connected. On the front surface of each of the storage shelves 2 of the device main body 1, for example, a status indicator 9 composed of a switching coloring lamp of two colors, red and blue, is provided at a position corresponding to each holder 4, respectively. The device 9 includes a control unit 6
Is connected to a display circuit (not shown), and is configured to switch and display the heating temperature rising state and the heat keeping state of the can S stored in the holder 4.

Next, the heating operation of the electromagnetic induction heating apparatus according to the present invention will be described. The cover 3 of the device body 1 is removed or opened, and the cans S at normal temperature or in a cooled state are put into the holders 4 of the respective storage shelves 2 from above and stored therein. Cover.
At this time, when the can bodies S are stored in the respective holders 4,
The corresponding first sensor 7 is turned on, and the signal is sent to the control unit 6. The control unit 6 confirms that the can S is accommodated in the holder, and energizes the electromagnetic induction coil 5.

When the electromagnetic induction coil 5 is energized, an induced current flows through the can S accommodated in the holder 4, and the can S itself generates heat due to Joule heat due to its electric resistance, so that the heating temperature increasing function is achieved. Operate. As a result, the heating and heating of the beverage or food in the can S is promptly executed, and at the same time, one of the display circuits of the status indicator 9 is turned on, and the red lamp is turned on to display the heating and heating state. .

When the temperature of the can body S (beverage food) is raised to an appropriate temperature set to a predetermined value, the second sensor 8 is turned on, and a signal is sent to the control unit 6. The control unit 6 controls the flow of current to the electromagnetic induction coil 5 and maintains the can S at a constant temperature. At the same time, the control unit 6
Switches the other display circuit of the status indicator 9 on,
The red lamp is turned off, the blue lamp is switched to the red lamp and lit, indicating the heat retention state.

When the can S stored in the holder 4 is taken out in such a warm state, the first sensor 7 corresponding to the can S is turned off, and the signal is sent to the control unit 6. The control unit 6 stops supplying power to the electromagnetic induction coil 5, and the heat retention is released. At the same time, the circuit of the status indicator 9 is turned off, the blue lamp is turned off, and the absence of the can S in the holder 4 is determined.

Incidentally, the control unit 6 includes a microcomputer, and a program having a heating / heating function and a heating function is incorporated in the microcomputer. This program has been
The temperature of the beverage in the can can be predicted from the surface temperature of the can S by the second sensor. for that reason,
From how many minutes after the initial value of the surface temperature of the can S, if the can S reaches a certain temperature, it is grasped how much the temperature of the beverages contained therein rises. Then, the remaining time until the temperature of the beverage is adjusted to the appropriate temperature is predicted, the current to the electromagnetic induction coil 5 is controlled, the temperature of the beverage is increased to the appropriate temperature in the shortest time, and the temperature is immediately maintained at the appropriate temperature. Control becomes possible. Therefore, it takes too much time to reach an appropriate temperature, or it is necessary to wait until the temperature rises too much, and conversely, it is not necessary to wait until it cools down.

In the above-described embodiment of the present invention, an apparatus for heating canned beverages such as coffee, tea or soup has been described as an example. However, the present invention is not limited to this. It can also be used for peripheral equipment or physics and chemistry experimental equipment. In addition, it goes without saying that the present invention can be variously modified and implemented without departing from the gist of the present invention.

[0017]

As described above, according to the present invention,
The can body can be quickly heated to an appropriate temperature and kept warm, and the power consumption is reduced, so that the economic efficiency can be improved by energy saving. In addition, since an electric heater or gas is not used, there is no risk of burns due to the generation of a red-hot portion, whereby safety can be ensured.

Further, since there is no need to use a water medium such as tap water, it is possible to omit the troublesome management of water as in the past, and to prevent the growth of bacteria, bad smell, dirt, and the like. Therefore, sufficient hygiene management can be performed, and there is no need to wipe off water droplets adhering to the can body taken out after keeping the temperature.

Further, by minimizing the time during which the object to be heated in the can body is heated and kept at a desired temperature, the time required to reach the temperature is saved, and the efficiency of sales and work is improved. .

In addition, by providing a transparent cover in the upper part of the apparatus main body so as to be detachable or openable, it is possible to prevent heat radiation during heating and heating of the can body, and to increase the efficiency of heating and keeping heat. , Sanitary. Moreover, cans (products) in each holder placed in a candy-shaped storage shelf
The type and brand can be easily visually recognized, and the can body (product) can be easily taken out.

[Brief description of the drawings]

FIG. 1 is an external view showing an embodiment of an electromagnetic induction heating device according to the present invention.

FIG. 2 is also a schematic sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 2 Storage shelf 3 Cover 4 Holder 5 Electromagnetic induction coil 6 Control unit 7 First sensor 8 Second sensor 9 Status indicator S Can

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B110 AA01 BA01 BA02 3E046 BB03 CA14 GA10 3K059 AB04 AB22 AB28 AC09 AC33 AC35 AC74 AD03 AD15 AD39 BD02 CD18 CD39 CD72

Claims (3)

[Claims] At least one pit-shaped holder capable of individually storing a magnetic metal can housing an object to be heated, and heating and raising the can stored in the holder by electromagnetic induction. Heating means for heating; a first sensor for detecting the presence or absence of a can body connected to the control means; a second sensor for detecting a surface temperature of the can body; When it is detected that the can body is housed, the amount of electricity to the heating means is controlled based on the surface temperature of the can body detected by the second sensor to control heating to a predetermined surface temperature to keep the temperature. Means, and an electromagnetic induction heating device comprising: 2. The control means grasps the temperature of the object to be heated in the can body from the surface temperature of the can body detected by the second sensor, and the object to be heated reaches a desired temperature from an initial temperature. 2. The electromagnetic induction heating apparatus according to claim 1, wherein the time until the heat retention is started at the temperature is controlled to be shortest. 3. The electromagnetic induction heating device according to claim 1, wherein a transparent cover is provided on an upper part of the device main body so as to be detachable or openable.