JPH0737174Y2 - Cooling and heating device for vending machines - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vending machine for selling beverages in packaging containers and the like.

2. Description of the Related Art In recent years, large-scale vending machines of the HOT & COLD type (hereinafter referred to as H & C), which are capable of heating at the same time as cooling, have been developed as beverage vending machines with packaging containers (hereinafter referred to as vending machines).

An example of a conventional H & C vending machine will be described below with reference to the drawings.

Fig. 3 shows the structure of a conventional cooling and heating device for an H & C vending machine.
FIG. 4 also shows an electric circuit.

In FIG. 3, reference numeral 1 is a main body having a heat insulating wall, and a heat insulating door 2 is attached to the front surface of the main body 1. Further, a heat insulating partition wall 3 is provided inside the main body 1 to form a first storage chamber 4a and a second storage chamber 4b. Furthermore, the compressor 5, the condenser 6,
The first capillary 7a and the first capillary provided in the first storage chamber 4a
The cooler 8a is sequentially piped, and the condenser 6 to the compressor 5 are connected.
Up to this, the solenoid valve 9, the second capillary 7b, and the second cooler 8b provided in the second storage chamber 4b are sequentially connected in parallel by piping.
Further, first and second in-compartment fan motors 10a and 10b are provided in the first and second storage chambers 4a and 4b, respectively. The second storage room 4b
The heater 11 is provided in the.

Next, the electric circuit will be described. In FIG.
The second internal fan motors 10a and 10b are directly connected in parallel to the power source. Reference numeral 12 is a changeover switch, the common terminal of which is at one end of the power supply, and the H terminal for changeover is provided with a heating thermostat 13, a temperature fuse 14, and a heater provided in the second storage chamber.
11 and sequentially connected to the other end of the power supply. Further, the C terminal for switching of the selector switch 12 is connected to the second cooling thermostat 15b provided in the second storage chamber, the solenoid valve 9 and the other end of the power source in sequence. Reference numeral 16 is a first cooling thermostat 15a provided in the first storage chamber 4a, one end of which is one end of the power supply, and the other end is the fan motor for cooling the compressor 5 and the condenser.
16 are connected in parallel to the other end of the power supply.

The operation of the conventional H & C vending machine configured as described above will be described below. When the changeover switch 12 is set to the H terminal side, the heating heater is controlled by the heating thermostat 13 and the second internal fan motor 10b is continuously rotated to heat the second storage chamber 4b to a constant temperature. On the other hand, the first storage room
Reference numeral 4a denotes a first cooling thermostat 15a, which controls the compressor 5 to cool the first cooler 8a and a first internal fan motor.
10a is continuously rotated and cooled to a constant temperature. Further, when the changeover switch 12 is set to the C terminal side, the power supply to the heating heater 11 is cut off, the solenoid valve 9 is controlled by the second cooling thermostat 15b, and the second cooler 8b is cooled.
The second internal fan motor 10b is continuously rotated and the second storage chamber 4b is cooled to a constant temperature. Since the second storage chamber 4b is set to have a smaller cooling load than the first storage chamber 4a, the second cooling thermostat 15b is within the range in which the compressor 5 is controlled by the first cooling thermostat 15a. The second cooler 8b can be cooled by controlling the solenoid valve 9 in FIG. Therefore, the first and second storage chambers 4a, 4b are cooled-cooled by the operation of the changeover switch 12.
Two types of operation, cooling and heating, are possible.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described configuration, when the cooling-heating operation is performed, the current and the input of the compressor 5 and the heater 11 are summed, and the current and the input of the entire vending machine are increased. It had the drawback of requiring large equipment. In particular, when the H & C vending machine became large, it exceeded the outlet capacity of general household equipment of 15 A, and had the drawback of requiring the installation of large equipment.

In view of the above drawbacks, the present invention reduces the output (input) of the heating heater to an output (input) capable of maintaining the temperature when the compressor is operating during cooling-heating operation, and when the compressor is stopped, By increasing the output (input) of the heater, the purpose is to reduce the input and current of the entire vending machine to below a certain value, so that equipment with a low power supply capacity can be used.

Means for Solving the Problems In order to solve the above problems, the cooling and heating device of the present invention comprises:
A changeover switch for selecting the operation mode of the second storage chamber, a main heater connected in series with a heating thermostat and a temperature fuse from the H side terminal of the changeover switch, and the start / stop of the compressor are detected. A contact for turning on and off, a heating thermostat, and an auxiliary heater connected in series with the contact.

The present invention has the above-described structure,
Since only the main heater is energized when the compressor is in operation and the main heater and the auxiliary heater are energized when the compressor is stopped, the current / input of the vending machine is operated at a low value by the current / input of the auxiliary heater. Therefore, the power supply capacity can be reduced accordingly.

Embodiment Hereinafter, a cooling and heating apparatus for a vending machine according to an embodiment of the present invention will be described with reference to the drawings, but the same structure as that of a conventional one will be denoted by the same reference numeral and the detailed description thereof will be omitted.

FIG. 1 shows an electric circuit of a cooling and heating device according to an embodiment of the present invention, and FIG. 2 shows a structure of the cooling and heating device of the same vending machine. In the figure, a relay 17 is connected in parallel with the compressor 5 from the first cooling thermostat 15a. On the other hand, the heating thermostat 13, the thermal fuse 14, and the main heater 18 are sequentially connected in series from the H terminal of the changeover switch 12. Further, an auxiliary heater 20 is connected through a contact 19 of the relay after the H terminal of the changeover switch, the heating thermostat, and the temperature fuse connected in series.

The operation of the cooling and heating device for the vending machine configured as described above will be described below with reference to FIGS. 1 and 2. First
In the storage chamber 4a, the compressor 5 and the condenser cooling fan motor 16 are controlled by the first cooling thermostat 15a, and the first cooling device.
8a is cooled and the first internal fan motor 10a is continuously rotated and cooled to a constant temperature. When the changeover switch 12 is set to the C terminal side, the electromagnetic valve 9 is controlled by the second cooling thermostat 15b, the second cooler 8b is cooled, and the second internal fan motor 10b continuously rotates and the second storage chamber. 4b is cooled to a constant temperature. When the changeover switch 12 is set to the H terminal side, the main heater is energized by the heating thermostat 13 and the relay 17 cuts off the energization when the first cooling thermostat 15a is OFF (the compressor 5 is stopped at this time). Then, the contact 19 of the relay is turned on and the auxiliary heater 20 is also energized and controlled. On the contrary, the first
When the cooling thermostat 15a is ON (the compressor 5 is operating at this time), the relay 17 is energized, the relay contact 19 is turned OFF, and the auxiliary heater 20 is not energized. As described above, the main heater 18 is controlled when the compressor 5 is operating, and the main heater 18 and the auxiliary heater 20 are controlled by the heating thermostat 13 when the compressor 5 is stopped, and the second internal fan motor 10b is continuously rotated. Then, the second storage chamber 4b is heated to a constant temperature.

As described above, according to this embodiment, the main heater and the auxiliary heater are provided in the second storage chamber, and the auxiliary heater is turned off when the compressor is in operation and is turned on when the compressor is stopped to stop the compressor. Since the power is supplied only during the period, the current and input during cooling-heating operation can be lowered and the power supply capacity can be reduced accordingly. Further, generally, when the output (input) of the heater is lowered, the temperature raising performance at low ambient temperature (the time characteristic required to heat the product from a low temperature to reach a certain temperature) deteriorates, but at low ambient temperature the compressor The operating rate is low, the energization rate of the auxiliary heater is considerably high, and it is possible to secure the same heating performance as the conventional one with a lower power supply capacity than the conventional one.

Effect of the Invention As described above, according to the present invention, the main heater and the auxiliary heater are provided in the second storage chamber, and the contact which turns on and off when the compressor is in operation and detects the operation / stop of the compressor is turned on. By controlling the energization of the auxiliary heater with, the auxiliary heater is energized and heated only when the compressor is stopped during the cooling-heating operation, so it can be operated with a lower current and input, and the power supply capacity Can be lowered.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of a cooling and heating device for a vending machine according to an embodiment of the present invention, FIG. 2 is a configuration diagram of the cooling and heating device, and FIG. 3 is a configuration diagram of a conventional cooling and heating device for a vending machine. The figure is the same electric circuit diagram. 1 ... Main body, 4a ... First storage room, 4b ... Second storage room, 5
...... Compressor, 12 ...... Switch, 13 ...... Heating thermostat, 15a ...... First cooling thermostat, 15b ...... Second cooling thermostat, 17 ...... Relay, 18 ...... Main heater, 19 ...... Relay contact, 20 ... Auxiliary heater.

Claims (1)

[Scope of utility model registration request] 1. A plurality of storage chambers divided by an insulating partition wall,
Main heaters and auxiliary heaters provided in the plurality of storage chambers, a cooling device having a compressor that cools the plurality of storage chambers, and a main heater and an auxiliary device that cools each of the plurality of storage chambers or is connected in parallel. Equipped with a plurality of changeover switches that energize the heater to switch to heating operation, and contacts that detect the operation and stop of the compressor and turn it off when the compressor is operating and turn it on when it is stopped and control the auxiliary heater. A cooling and heating device for a vending machine, which is characterized by that.