JPH03255816A - High frequency heating device - Google Patents

Abstract

PURPOSE:To mount the heating device on a movable vehicle for the convenience of its use by providing an electromagnet which is actuated upon detecting acceleration, centrifugal force or angular velocity so that a container of items to be heated is held by the magnetic force of said electromagnet. CONSTITUTION:In a microwave heater which can be mounted on a large bus, cruiser, the bullet train or aeroplane and used therein, a container 1 in which items to the heated are placed or mounted is integrally combined with a structure 2 made of magnetic material and mounted on the bottom of a heating chamber 3. In response to starting, acceleration, emergency stop, running along a curve or rear-end collision, an acceleration detection means 30 or a means 31 for detecting centrifugal force or angular velocity respectively inputs an output signal of its own into a control unit 32, which in turn computes a time variation of these signals and when either one of the variation of input signal exceeds a reference variation stored in advance, a command to actuate a solenoid valve is transmitted to an solenoid drive circuit 29 to suck a magnetic structure 2 attached to the container toward the bottom surface of a heating chamber 3. As a result, the container accommodating the items to be heated can be prevented from being turned upside down.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is a high-frequency microwave that is mounted on a mobile engine such as an automobile or a ship powered by an internal combustion engine and that heats objects made of solid or fluid materials using microwaves. This invention relates to a heating device.

BACKGROUND OF THE INVENTION This type of apparatus, as typified by a microwave oven, is equipped with a door that opens and closes when a heated object is taken in and taken out of a heating chamber to which microwaves are supplied. This door used to have a mechanism that locked it when closed, but now it is kept closed using a spring or a pawl on the door itself. Since a household microwave oven has the above configuration, the door can be easily opened by pulling the door or pressing a button with one hand. On the other hand, some commercial use devices are equipped with a manual locking mechanism.

Moreover, the heating chamber is generally equipped with a rotating table on which the object to be heated can be placed as a means for uniformly heating the object. There is also a configuration in which a radio-wave stirring metal blade is installed in some parts, and the object to be heated is placed directly on the bottom surface of the heating chamber.

Devices of this type have now become a necessity in the home, but they are also used outside the home, for example in large buses, cruisers, and airplanes.

For these devices, microwave ovens used in homes are used as they are, or for commercial use, devices with higher output or a larger heating chamber are used.

These types of devices that have been used outside the home have generally been used in a user-specified environment and by people who are familiar with the environment and operation of the device.

On the other hand, in recent years, with the advent of foods made exclusively for high-frequency heating devices and frozen foods, and the expansion of the restaurant industry, changes have appeared in eating habits, and outdoor leisure activities have also become popular as people have more free time. In such a social environment, there is a need for a high-frequency heating device that can be used by an unspecified number of people in mobile vehicles such as private cars and private ships.

Problems to be Solved by the Invention However, when this device is mounted on a mobile engine and used, vibrations are applied to the device while the mobile engine is running, and it is difficult to safely and conveniently perform high-frequency heating in an environment accompanied by this vibration. It is necessary to do it in a good manner.

For example, when a car is equipped with this device to heat and cook food, when the vehicle stops suddenly due to necessity while driving, conventional devices of this type may cause the object to be heated to fall over, or in the worst case scenario, the door may open and the object to be heated may fall. There is a possibility that it will scatter inside the car, so this needs to be resolved. Particularly when the object to be heated is a liquid food such as coffee, milk, or soup, the basic problem is how to stably place the object to be heated in the heating chamber.

The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a high-frequency heating device that is convenient for mounting on a mobile engine and for its practical use.

Means for Solving the Problems In order to solve the above problems, the high frequency heating device of the present invention has a heating chamber in which the object to be heated is stored, a door for putting the object in and out of the heating chamber, and a built-in or The device is equipped with a detection means for detecting the gravity applied to the apparatus, and an electromagnet that operates based on the output of the gravity detection means, and the door or the storage container for the object to be heated is held by the magnetic force of the electromagnet. .

Furthermore, the gravity detection means is comprised of acceleration detection means, centrifugal force detection means, or angular velocity detection means.

Effect of the present invention With the above-described configuration, the weight detection means detects changes in the gravity applied to the device according to the running state of the mobile engine (for example, when starting, when stopping twice, when traveling on a curve, when rear-ending the vehicle, etc.). Based on this detection signal, the control unit of this device predicts and judges the risk of the heated object falling over, and when the vehicle is in a running state where there is a possibility of falling, it activates the electromagnet to store or place the door or the heated object. Holds the container with magnetic attraction. This prevents the object to be heated from falling or opening the door.

Control of operating the electromagnet based on the signal from the acceleration detection means is performed in a state where the gravity applied to the device is changing greatly, and the operation of the electromagnet is controlled based on the amount of change in gravity over time. On the other hand, if the vehicle is traveling at a constant speed around a curve, for example, this state is identified by centrifugal force detection means or angular velocity detection means. Therefore, the operation control of the electromagnet based on the output of the centrifugal force detection means and the angular velocity detection means is different from the operation control of the electromagnet based on the acceleration detection means.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

1 and 2 are examples of the first means of the present invention. In Figures 1 and 2, 1 is a container in which the object to be heated is stored, 2 is a structure made of magnetic material attached to the container, 3 is a heating chamber in which the object to be heated is stored, and 4 is a heating chamber. 5 is a magnetron 6 that generates microwaves to supply electricity to the heating chamber, and a tiff magnet that is installed close to the bottom of the
This is a power supply unit that drives and controls the stone 4. In addition, 7 is a waveguide,
Reference numeral 8 designates a radio wave agitation means, 9 a partition plate made of a low microwave loss material, 10 a door for taking the heated object in and out of the heating chamber 3, 11 an operation panel, 12 a main body, and 13 a main body support.

14 is a battery, 15 is an oil generator that generates AC power by an internal combustion engine, and its output is connected to a diode 1.
A DC power supply section 19 is formed which is rectified by 6 to 1 days and connected in parallel with the battery 14 to drive the high frequency heating device. The DC voltage of this DC power supply section is supplied to an inverter circuit 24 including a bypass capacitor 20, a step-up transformer 21, a resonant capacitor 22, a transistor 23, and the like. The output of the inverter circuit is supplied to the magnetron 6 as the output of the two secondary windings of the step-up transformer 21.

The output of the high voltage secondary winding is converted to high voltage DC via a high voltage rectifier circuit 28 consisting of a capacitor 25 and a diode 2627, and then supplied to the magnetron. Meanwhile, the output of the low voltage secondary winding is supplied to the magnetron cathode. Further, the DC voltage of the DC power supply section 19 is input to an electromagnet drive circuit 29 that generates a voltage to be supplied to the electromagnet 4.

30 is an acceleration detection means, which is configured by a method using a magnetic weight and a differential coil, a method using a weight magnet and a magnetic conversion element, etc., and is installed in the mobile engine on which this device is installed. . 31 is a centrifugal force detection means or an angular velocity detection means, and when installed in a mobile engine, the steering angular velocity is mainly detected using a rotating slint and a photocoupler. It consists of a structure using a coil or a magnetic transducer element. The control unit 32 controls the step-up transformer 2 based on a data input signal 33 of heating information on the object to be heated inputted from the operation panel of the high-frequency heating device.
1 and a resonant capacitor 22, and an inverter circuit control section that controls the conduction time of the transistor 23 in synchronization with the resonant state of the resonant circuit consisting of the resonant circuit 1 and the resonant capacitor 22; It is mainly composed of a control section that operates the is magnet drive circuit 29 and operates the electromagnet 4. With the above configuration, the container in which the object to be heated is housed or placed is integrally combined with the structure made of magnetic material and placed on the bottom surface of the heating chamber. The acceleration detection means, the centrifugal force detection means, or the angular velocity detection means each generate their own output signals in response to starting, accelerating, suddenly stopping, driving around a curve, rear-end collision, etc. (hereinafter, this state is referred to as an unstable state). is input to the control unit 32. The control unit calculates the amount of change in these signals over time, and when the change in one of the input signals exceeds the predetermined and stored reference amount of change, it immediately transmits a command to the electromagnet drive circuit 29 to activate the electromagnet, and causes the container to be activated. The attached magnetic material structure is attracted to the bottom of the heating chamber.

As a result, the container containing the object to be heated can be prevented from falling over.

In this type of device, the operation of the magnetron drive power source is controlled based on the closed state of the door, but the operation of the electromagnet may be controlled independently of the door closing signal.

In addition, if the electromagnet is configured to operate for a predetermined period of time based on a signal that indicates an unstable state, when a signal that indicates an unstable state is sent from each detection means while the electromagnet is operating, The electromagnet operating time is updated. This update time may be determined by the time when the last signal indicating an unstable state is sent.Furthermore, the magnetic material attached to the container may be magnetized in advance. In this case, when an abnormal state occurs, the suction can be held more firmly.

3 and 4 show an embodiment of the second means of the present invention, and the configuration different from the first means is that the electromagnets 34, 35 are attached to the main body wall surface 36 facing the door 10. These points are located close to each other. As a result, when the electromagnet is activated, the door is magnetically attracted and held to the main body side, thereby preventing the object to be heated from scattering out of the apparatus from the heating chamber in an unstable state. In addition,
Components corresponding to FIGS. 1 and 2 are designated by the same numbers.

In addition, the configuration in which the door is held by magnetic attraction and the configuration in which the storage container for heated objects is held by magnetic attraction may be used together. In this case, the convenience of this device in mobile engines will be doubly emphasized. become. Furthermore, since the gravity detection means and the control unit grasp changes in the gravity applied to the device from time to time, it is also possible for users of this device to predict future changes in gravity based on the amount of change. A state in which a door cannot be opened or a heated object cannot be taken out without perceiving an unstable state is a means of sensually informing the user of an unstable state. For example, it is possible to avoid a situation where the coffee becomes unstable and spills as soon as the hot coffee is taken out.

Effects of the Invention As described above, the high frequency heating device of the present invention provides the following effects.

(1) The container or door of the heated object is magnetically attracted and held by the magnetic force of the electromagnet that detects the gravity applied to the device and operates based on this detection signal, thereby preventing the heated object from falling over or scattering outside the device. It is possible to provide a device that can be prevented from occurring and is highly convenient to be installed on a mobile engine.

(2) The configuration detects changes in gravity applied to this device using acceleration detection means, centrifugal force detection means, or angular velocity detection means, so that it is possible to detect changes in gravity that are applied to the device by acceleration detection means, centrifugal force detection means, or angular velocity detection means. The stable state can be grasped, and the safe usage environment of the device can be made clear to the user.

(3) By magnetically attracting and holding the container or door, the user of this device can be intuitively informed whether the environment in which the heated object is being taken in or taken out is safe or unsafe, thereby increasing the safety level. We can provide equipment that can.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a high-frequency heating device showing an embodiment of the present invention, Fig. 2 is a circuit diagram of a drive power circuit in which the device is mounted on a mobile engine having an internal combustion engine, and Fig. 3 is a circuit diagram of the high-frequency heating device according to the present invention. FIG. 4 is a cross-sectional view of a high-frequency heating device showing another embodiment, and a circuit diagram of a drive power supply circuit in which the device is mounted on a mobile engine having an internal combustion engine. 1... Container, 2... Magnetic material structure,
3... Heating chamber, 4.34.35... Electromagnet, 10... Door, 29... Electromagnet drive circuit, 30 Acceleration detection means, 31. ... Centrifugal force detection means or angular velocity detection means, 32 ... Control section, 36 ... Main body wall surface.

Claims (4)

[Claims] (1) A heating chamber in which an object to be heated is stored, a door through which the object to be heated is taken in and out of the heating chamber, a detection means that is built in or attached to this apparatus and detects the gravity applied to this apparatus, and the gravity detection means A high-frequency heating device comprising an electromagnet that operates based on the output of the electromagnet, and configured to hold the door or the storage container of the object to be heated by the magnetic force of the electromagnet. (2) a heating chamber in which an object to be heated is stored, an electromagnet provided on the bottom of the heating chamber, and a structure made of a magnetic material attached to a container in which the object to be heated is stored or placed;
A detection means that is built in or attached to the device and detects the gravity applied to the device, and a control section that operates the electromagnet based on the output of the gravity detection means to magnetically attract and hold the structure made of the magnetic material. high frequency heating device. (3) A door forming one wall of the heating chamber where the object to be heated is stored, an electromagnet provided on the wall of the main body that faces the door, and an electromagnet built into or attached to this device that detects the gravity applied to this device. and a control section that operates the electromagnet based on the output of the gravity detection means to magnetically attract and hold the door. (4) The high-frequency heating device according to claim 1, 2, or 3, wherein the gravity detection means is comprised of acceleration detection means, centrifugal force detection means, or angular velocity detection means.