JPH0276095A - Heater for automatic vending machine - Google Patents

Abstract

PURPOSE:To heat a product to a uniform temperature without being conscious of an ambient temperature by providing an arithmetic part to compute heating time by an induction heating coil from the ambient temperature detected by a temperature sensor and a preset temperature set at a temperature setting apparatus. CONSTITUTION:The subject device is the one to heat the product of can vessel sold in an automatic vending machine by an induction heating system, and is provided with the temperature sensor A to detect the ambient temperature, the temperature setting apparatus B to set the heating temperature of the product, the arithmetic part D to calculate the heating time by the induction heating coil C from the ambient temperature detected by the temperature sensor A and the preset temperature set at the temperature setting apparatus B, and a feed means E to supply a power to the induction heating coil during the heating time found at the arithmetic part D. In such a way, it is possible to heat the product to a constant temperature in spite of the ambient temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for heating products in cans and containers sold in vending machines using an induction heating method.

[Prior Art] As this type of induction heating device, one is known that heats a product in a can by energizing an induction heating coil for a certain period of time.

[Problem to be Solved by the Invention] However, in the method of heating for a certain period of time as described above, the temperature of the product increases in proportion to the heating time compared to the temperature of the product before heating, so the temperature after heating is The drawback was that it depended on the temperature before heating, and the temperature of the product varied depending on the season.

The present invention was made to eliminate the above-mentioned problems, and an object of the present invention is to provide a heating device for a vending machine that can heat products to a constant temperature regardless of the ambient temperature.

[Means for Solving the Problems] The heating device for a vending machine of the present invention is a device that induction-heats products in cans and containers to be sold using an induction heating coil, and includes a temperature sensor A that detects the surrounding temperature, and a temperature sensor A that detects the surrounding temperature. a temperature setting device B for setting the heating temperature of the temperature setting device B; a calculation section calculating the heating time by the induction heating coil C from the ambient temperature detected by the temperature sensor A and the set temperature set by the temperature setting device B; It is characterized by comprising a power supply means E that supplies power to the induction heating coil during the heating time determined by the calculation section.

Effect] The heating time T3 of the induction heating coil C and the temperature rise ΔT of the product due to this heating are in a proportional relationship as T3=K·8T. Temperature sensor A
If the temperature of the product before heating detected by T1 is T1, and the heating temperature set by temperature setting device B is T2, ΔT=T, -
T, so in the calculation section, T3=K・'(T
, -Tυ, the heating time T can be determined, and during this heating time T3, power is supplied to the induction heating coil C by the energizing means E.

[Embodiment] FIG. 2 is a block diagram showing an embodiment of a heating device for a vending machine according to the present invention.

l is the CPU (central processing unit) that centrally controls this device.
As will be described later, the inside includes a calculation unit 1a that calculates the heating time from the temperature before and after heating the product. 2
is a memory that stores various data necessary for controlling the CPUI. 3 is a human output section, and each device described below is connected to the CPU 1 via this input/output section 3. 4 is a temperature sensor that detects the ambient temperature T1 as the temperature before heating the product, and 5 is an A/D converter that converts an analog detection signal from the temperature sensor 4 into a digital signal. 6 is a temperature setting device for setting the heating temperature T of the product. 7 is a sales start switch that is turned on when selling a product. 8 is an induction heating coil for induction heating the products to be sold, and 9 is an induction heating power source that supplies power to the induction heating coil 8. Xl is a heating start relay, and the contact x1 of this relay is inserted into the line between the induction heating coil 8 and the induction heating power source 9. This induction heating power source 9 and contact x1 correspond to the above-mentioned power supply means. Xl is a product conveyance relay for conveying the product to be sold to the heating position of the induction heating coil 8 when the sales start switch 7 is turned on.

Next, the operation of the apparatus having the above configuration will be explained based on the flowchart shown in FIG.

In step S1, it is determined whether or not the heating temperature T is set by the temperature setting device 6. If the heating temperature T2 is set, the heating temperature T2 is stored in the memory 2 in step S2.

In the next step S3, the presence or absence of sales is determined, and when the sales start switch 7 is turned on, the product conveyance relay X is turned on in step S4, and the product to be sold is placed at the heating position of the induction heating coil 8. transported to.

In step S5, the ambient temperature T1 measured by the temperature sensor 4 is read, and in step S6, the heating time T3 is calculated by the calculation section 1a using the following formula.

T3-('rt-'r,)・K (K is proportionality constant)
Then, in step S7, the heating start relay X1 is turned on to heat the product with the induction heating coil 8 during the heating time T3.

[Effects of the Invention] As explained above, the present invention detects the temperature of the product and adjusts the heating time required to heat it from that temperature to a predetermined temperature because the temperature rise of the product is proportional to the heating time. Since it is calculated, the product can be heated to a uniform temperature regardless of the ambient temperature.

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to the claims of the heating device for a vending machine of the present invention, Fig. 2 is a control block diagram of an embodiment of the present invention, and Fig. 3 shows the control operation of the device of Fig. 2. It is a flowchart. 1...CPU, la...calculation unit, 2...memory,
3... Input/output section, 4... Temperature sensor, 5... A/
D converter, 6...Temperature setting device, 7...Sales start switch, 9...Induction heating coil, 9...Induction heating power supply,
X: Relay for starting heating, X: Relay for transporting products. Patent applicant: Fuji Electric Co., Ltd. Agent Patent attorney: Aohaku Ao, 1 other person Figure 1 CE Figure 2

Claims (1)

[Claims] (1) In a device that uses an induction heating coil to induction-heat products in cans and containers to be sold, there is a temperature sensor that detects the surrounding temperature, a temperature setting device that sets the heating temperature of the product, and a temperature sensor that detects the temperature of the product. a calculation unit that calculates the heating time by the induction heating coil from the ambient temperature and the set temperature set by the temperature setting device; and a power supply means that supplies power to the induction heating coil during the heating time determined by the calculation unit; A heating device for a vending machine characterized by comprising: