JPS6162993A - Vending machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a cooling mechanism equipped with a compressor to cool the product, and a heating mechanism equipped with a heater to heat the product, and selectively sells cooled products and heated products. Regarding vending machines.

[Technical background of the invention and its problems] In this type of vending machine, when the heater and compressor operate simultaneously, the total electric power becomes enormous. This makes it necessary and uneconomical.

For this reason, conventionally, when one is in operation, the other is stopped to suppress operating power.

However, with this kind of control, when either one is used frequently, for example when a large amount of cooled products are sold in the summer, the compressor operates continuously, so the heater is rarely energized. As a result, the temperature of heated products would drop below the specified temperature, causing problems such as products that were not heated sufficiently being sold, and sales of heated products being stopped.

[Purpose of the Invention] This invention was made to solve the above problem, and by supplying a certain amount of current to the heater even when the compressor is energized, the temperature of the heated product can be adjusted. To provide an automatic vending device which can always sell both chilled products and heated products in a good temperature condition by preventing temperature drop as much as possible.

[Summary of the Invention] The present invention provides a vending machine that selectively sells chilled products and heated products, which includes a cooling mechanism equipped with a compressor to cool products, and a heating mechanism equipped with a heater to heat the products. A cooling thermoswitch that turns off when the temperature drops below a preset temperature and turns on when it rises above this temperature, a heating control relay connected in parallel to the compressor, and a normally closed contact of this relay connected in parallel. The compressor is energized via a cooling thermoswitch, and the heater is energized through a parallel circuit between the normally closed contact of the heating control relay and the current control rectifier. This is done through the .

Further, the present invention provides a vending machine that selectively sells chilled products and heated products, which is provided with a cooling mechanism equipped with a compressor to cool the product, and a heating mechanism equipped with a heater to heat the product, and in which the temperature of the heating mechanism is set in advance. A heating thermoswitch that turns off when the temperature rises above the set temperature and turns on when the temperature drops below this temperature, a cooling control relay that is connected to the power supply via this heating thermoswitch, and a cooling control relay that is connected in parallel to the compressor. A heating control relay and a current control rectifying element connected in parallel to the normally closed contact of this relay are provided, and the compressor is energized via the normally closed contact of the cooling control relay, and the heater is supplied with electricity through the normally closed contact of the cooling control relay. energization is carried out through a parallel circuit of the normally closed contact of the heating control relay and the current control rectifying element.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a compressor provided in the cooling mechanism, and 2 is a heater provided in the heating mechanism. Note that the cooling mechanism cools the products to be sold cold, and the heating mechanism heats the products to be sold heated. In addition, a 300W compressor is used as the compressor 1, and a 300W one is used as the heater.
I'm using one from KW.

Further, 3 is a cooling thermoswitch which turns off when the temperature of the cooling mechanism falls below a preset temperature and turns on when the temperature rises above this temperature, and 4 indicates a cooling thermoswitch when the temperature of the heating mechanism is higher than the preset temperature. It is a heating thermoswitch that turns off when the humidity reaches this level and turns on when the humidity drops below this level.

ACl 00V commercial AC power supply line LI,
A timer 5 is connected to L2 via the cold section thermoswitch 3. The compressor 1 is connected in parallel to the timer 5 via a contact switch 51 of the timer. Further, a heating control relay 6 is connected to the timer 5 in parallel.

Further, the heater 2 is connected to the lines L1 and L2 through the heating thermoswitch 4 and the normally closed contact 61 of the relay 6 in series. A diode 7 is connected in parallel to the normally closed contact 61 as a current control rectifying element with the polarity shown.

Although not shown, this device includes a coin mechanism for accepting money, a selection switch for selecting products to sell, and sales of cooled or heated products in response to the insertion of a predetermined amount of money into the coin mechanism and operation of the selection switch. It is equipped with a working bend mechanism.

In the device according to the embodiment of the present invention configured as described above, when the temperature of the cooling mechanism is lower than the set temperature, the cooling thermoswitch 3 is turned off. Power has been stopped. Thus, the normally closed contact 61 of the relay 6 is on, and if the temperature of the heating mechanism is below the set temperature, the heater 2 is energized via the heating thermoswitch 4 and the normally closed contact 61. In this manner, when the operation of the compressor 1 is stopped, the heater 2 is energized with a full alternating current wave, and the heater 2 operates at the heating port of the IKW. In this state, when the temperature of the cooling mechanism rises above the set temperature, the cooling thermoswitch 3 is turned on, which causes the timer 5 to operate, and after a predetermined delay, the contact switch 51 of the timer 5
turns on. The compressor 1 then operates to cool the cooling mechanism and cool the products for sale. On the other hand, as soon as the cooling thermoswitch 3 is turned on, the heating control relay 6 is turned on.
operates to turn off the normally closed contact 61. Then, when the temperature of the heating mechanism falls below the set temperature, the heater is energized via the heating thermoswitch 4 and the diode 7, and the amount of heat generated by the heater 2 is halved to 500W. Therefore, even if the compressor 1 and heater 2 operate simultaneously, the total power is 800W. Therefore,
The power supply capacity may be set to match the total heat generation amount of the heater 2, which is 1 kW, and there is no need to make the power supply capacity so large that it becomes uneconomical. Moreover, even if compressor 1 is used, heater 2 can operate with half of the total heat generation, so the temperature of the heating mechanism may become abnormally low and sales of heated products may be stopped, or heating may be insufficient. There is no risk that it will be sold as is. In other words, both chilled products and heated products can always be sold at a good temperature. Note that when the temperature of the heating mechanism becomes higher than the set temperature, the heating thermoswitch 4 is turned off to stop supplying electricity to the heater 2, thereby suppressing the temperature of the heating mechanism within a predetermined temperature range.

Next, another embodiment of the invention will be described with reference to the drawings.

Components that are the same as those in the embodiment described above are given the same reference numerals and detailed explanations will be omitted.

In this case, a heating upper limit temperature control thermoswitch 8 is connected in series with the heater 2 instead of the heating thermoswitch 4, and the heating upper limit temperature control thermoswitch 8 and the heating thermoswitch are connected to lines L1 and L2. A cooling control relay 9 is connected in series with a heating thermoswitch 14 having the same function as the cooling control relay 9. In addition, the cooling thermoswitch 3, the timer 5, and its contact switch 51 are omitted, and the compressor 1 and the heating control relay 6 are connected to the lines L1 and L2 via the normally closed contact 91 of the cooling control relay 9.
A parallel circuit is connected with.

With this configuration, when the temperature of the heating mechanism is below the set temperature, the heating thermoswitch 14 is on, so the cooling control relay 9 is operated and its normally closed contact 91 is off. In this state, the normally closed contact 61 of the heating control relay 6 is on, and the heater 2 is connected to the IKW.
The compressor 1 operates with a calorific value of , while the operation of the compressor 1 is stopped.

Thereafter, when the temperature of the heating mechanism rises above the set temperature, the heating thermoswitch 14 is turned off, thereby stopping power supply to the cooling control relay 9 and turning on its normally closed contact 91. In this way, the compressor 1 starts operating, and the cooling mechanism cools the chilled product. Further, the heating control relay 6 is activated and its normally closed contact 61 is turned off. As a result, the heater 2 is energized via the diode 7, and the heater 2 now operates with half the amount of heat generated.

In this way, also in this embodiment, when the compressor 1 is operating, the power supply to the heater 2 is not stopped, and the heating port is operated with half the maximum heat generation amount, so that the same effect as in the previous embodiment can be obtained. It is.

Note that if the temperature of the heating mechanism exceeds a preset upper limit temperature, the heating upper limit temperature control thermoswitch 8 is turned off to stop power supply to the heater 2, thereby preventing an abnormal rise in temperature.

In each of the above embodiments, a diode is used as the current control rectifying element, but the present invention is not limited to this, and for example, a thyristor may be used. For example, when a bidirectional thyristor is used as the thyristor, the maximum amount of heat generated by the heater 2 is the sum of that amount of heat and the power consumption of the compressor 1. For example, in the above-mentioned embodiment, the amount of heat generated by the heater 2 when the compressor 1 is used can be reduced to 7.
The power can be increased up to 00W, making it possible to more reliably prevent a drop in the temperature of the heating mechanism.

[Effects of the Invention] As detailed above, according to the present invention, even when the compressor is energized, the heater is energized to a certain extent to prevent the temperature of the heated product from decreasing as much as possible. It is possible to provide a vending machine that can always sell both chilled products and heated products in a good temperature condition.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of the main part showing one embodiment of the present invention;
The figure is a circuit diagram of main parts showing another embodiment of the present invention. 1... Compressor, 2... Heater, 3... Thermoswitch for cooling, 4.14... Thermoswitch for heating, 6... Relay for heating control, 7... Diode,
9...Relay for cooling control.

Claims (2)

[Claims] (1) In a vending machine that selectively sells chilled products and heated products, the machine is provided with a cooling mechanism equipped with a compressor to cool the products and a heating mechanism equipped with a heater to heat the products, and the temperature of the cooling mechanism is set in advance. A cooling thermoswitch that turns off when the temperature drops below a certain temperature and turns on when the temperature rises above this temperature, a heating control relay that is connected in parallel to the compressor, and a heating control relay that is connected in parallel to the normally closed contact of this relay. A rectifier for current control is provided, and the compressor is energized via the cooling thermoswitch, and the heater is energized by connecting the normally closed contact of the heating control relay and the current control rectifier. A vending machine characterized by vending through a parallel circuit. (2) In a vending machine that selectively sells chilled products and heated products, the device is provided with a cooling mechanism equipped with a compressor to cool the products and a heating mechanism equipped with a heater to heat the products, and the temperature of the heating mechanism is set in advance. a heating thermoswitch that turns off when the temperature rises above the specified temperature and turns on when the temperature drops below this temperature; a cooling control relay that is connected to the power supply via the heating thermoswitch; and a cooling control relay that is connected in parallel to the compressor. A heating control relay and a current control rectifying element connected in parallel to the normally closed contact of this relay are provided, and the compressor is energized via the normally closed contact of the cooling control relay. A vending machine characterized in that the heater is energized via a parallel circuit of the normally closed contact of the heating control relay and the current control rectifying element.