JPH045791A - In-box cooler for automatic vending machine - Google Patents

Abstract

PURPOSE:To highly conveniently correspond respective 3 chambers to the sales of various merchandise by inserting a solenoid valve operated through respective thermostats to the branch pipes respectively to the left and right chambers of refrigerant piping guiding the refrigerant from a compressor. CONSTITUTION:A right chamber N is used for cooling only. When using a middle chamber M as a cooling chamber, a shutter 11 is opened to feed cold air cooled by a evaporator 7N through an air hole 12. The cooling of a heating chamber and the right chamber N is controlled by opening and closing a solenoid valve 9N by a thermostat 8N detecting the cooling temperature of the chamber. Besides, a compressor 4 continues operating when either of a solenoid valve 9L or the solenoid valve 9N is opened and stop operating for the first time when both of the solenoid valves are closed. Therefore, since the compressor 4 continues operating by the opening of the solenoid valve 9 by the temperature detected by a thermostat 8L, a left chamber L is cooled enough even when used by switching from the heating chamber to the cooling chamber, and also it is cooled till a prescribed cooling temperature in a short time.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a vending machine in which the interior is divided into three chambers: a left chamber, a middle chamber, and a right chamber. The chamber and the left chamber relate to an internal cooling system for selectively using the chamber as a cooling chamber.

[Conventional technology]

As this type of refrigerator cooling device, one shown in FIG. 3 is known. In the figure, the vending machine is shown in the main body case 1.
The inside of the chamber is divided into three chambers: a left ventricle formed by a heat insulating wall, a middle chamber M, and a right ventricle N, and the partition wall between the middle chamber M and the right ventricle N has a ventilation hole equipped with a shutter 11 that can be opened and closed. 12 are provided. Further, a machine room 13 is formed below the inside of the main body case 1. Next, a compressor 4 and a condenser 5, which serve as the internal cooling device 3, are installed in the machine room 13, and evaporators 7L and 7N, to which refrigerant is circulated and supplied from the compressor 4 through the condenser 5 via the refrigerant piping 6, are on the left. They are placed in the room and right ventricle N, respectively. Furthermore, in the right chamber N, there is a cooling thermostat 8 for detecting the indoor cooling temperature and controlling the operation of the compressor 4.
N is provided.

On the other hand, a 1i magnetic valve 9L is inserted and installed in the branch pipe 6L connected to the evaporator 7L of the refrigerant pipe 6 which branches downstream of the condenser 5 and is connected to each evaporator. A thermostat 8L is provided for detecting temperature and controlling the opening and closing of the electromagnetic valve 9L.

ILL and IIM are heaters that serve as heat sources when the left chamber and middle chamber M are used as heating chambers, and are installed in each chamber together with heating thermostats 12L and 12M that detect the heating temperature in the chamber, respectively. Configure device IO.

FIG. 4 shows the sequence of the internal cooling device 3 and the internal heating device 10. Note that one of 16 and 17 is O.
A switch that operates in conjunction with the other OFF when it is N, 1
8 is a switch similar to 17.

The above-mentioned vending machine has three compartments that can be used as a heating compartment (H) or a cooling compartment (20) depending on whether the product is being sold as a hot product or a cold product. Initially, the above vending machine did not have heater IIL and thermostat 12L installed in the left ventricle, and the usage mode of the middle chamber M1 and right ventricle N was set to C-C-C or C-H-C. Right ventricle N is dedicated for cooling, middle ventricle M
It was used for cooling or heating depending on the product. Cooling of the left ventricle is controlled by opening and closing the solenoid valve 8L, while cooling of the right ventricle N is performed by directly controlling the operation of the compressor 4. The heater IIL and thermostat 12L were also installed in the left ventricle so that products could be sold in more variety. As a result, the usage mode of the three chambers in the refrigerator is changed from the conventional C-C-C.
and C-H-C in two ways, plus H-H-C and H-C-
It became possible to use C in two ways, expanding the sales area for the product.

[Problem to be solved by the invention]

By the way, in a conventional vending machine where the three compartments can be used in four different modes, the thermostat (12)
Since the operation of the compressor 4 is controlled by N, the usage mode H-H-C or H- in which the left ventricle is used for hot products is selected.
When changing the usage mode from C-C to C-C-C or C-H-C in which the left ventricle is used for cold products, the left ventricle may take a long time to cool or is not cooled sufficiently. was occurring.

It is an object of the present invention to provide an internal cooling device for a vending machine that ensures the above-mentioned four usage modes for the three chambers in the chamber and cools each of the three chambers appropriately.

[Means to solve the problem]

In order to achieve the above object, according to the present invention, the interior of the vending machine is divided into three chambers, a left chamber, a middle chamber, and a right chamber, and the vending machine is arranged in the left chamber and the right chamber, respectively. It consists of an evaporator, a compressor that circulates and supplies refrigerant to these evaporators, and a vent opening in the partition wall between the right chamber and the middle chamber and equipped with a shutter that can be opened and closed, so that the right chamber is always used as a cooling chamber. In the internal cooling device for a vending machine, the left chamber and the middle chamber are selectively used as a cooling chamber, in which a thermostat is installed in each of the left chamber and the right chamber to detect the cooling temperature in the room. , a solenoid valve operated via each of the thermostats is inserted and installed in each of the branch pipes to the left chamber and the right chamber of a refrigerant pipe that guides refrigerant from the compressor.

[Effect]

The cooling of the left and right compartments is controlled by electromagnetic valves that are opened and closed via thermostats that detect the cooling temperature in the room, and the operation of the compressor is controlled based on both electromagnetic valves. Therefore, the problem of the previous note can be solved.

〔Example〕

1 and 2 show an embodiment of the invention, and parts common or identical to those in FIGS. 3 and 4 are designated by the same reference numerals.

In FIGS. 1 and 2, a solenoid valve 9N is also inserted in the branch pipe 6N of the refrigerant pipe 6 that supplies refrigerant from the compressor 4 to the evaporator 7N, and this solenoid valve 9N is connected to the right ventricle N
Opening/closing is controlled by thermostat 8N. Note that the relay 15a is a contact point of the relay 15.

In the above configuration, the right ventricle N is dedicated to cooling, the middle ventricle M
When used as a cooling chamber, the shutter 11 is opened and cold air cooled by the evaporator 7N is sent through the ventilation hole 12. Also, when using it as a heating chamber, shutter 1
1 is closed and heated by the heater 11M. Therefore, the three chambers in the warehouse, left ventricle L, middle chamber M, and right ventricle N, are c-c-c.
, c-H-C, H-H-C, and H-C-C. Cooling of the right ventricle N is controlled by opening and closing a solenoid valve 9N by a thermostand 8N that detects the cooling temperature in the room. Furthermore, the compressor 4 continues to operate when one of the solenoid valves 9L and 9N is open, and stops only when both solenoid valves close. Therefore, even when the left chamber is switched from the heating chamber to the cooling chamber, the compressor 4 continues to operate by opening the solenoid valve 9L depending on the temperature detected by the thermostat 8L, so it is sufficiently cooled and in a short time. It is cooled to a predetermined cold storage temperature.

〔Effect of the invention〕

According to this invention, the vending machine has an interior divided into three chambers, a left chamber, a middle chamber, and a right chamber. It consists of one compressor that circulates and supplies air, and a ventilation hole that opens in the partition wall between the right ventricle and the middle chamber and is equipped with a shutter that can be opened and closed. In this internal cooling device for a vending machine, which is selectively used as a cooling chamber, thermostats are installed in each of the left and right chambers to detect the cooling temperature in the room, and the thermostats are activated via each of the thermostats. A solenoid valve is installed in each of the branch pipes to the left and right chambers of the refrigerant piping that guides the refrigerant from the compressor, so that the three chambers are C-C-C, C-C-C, -H-C, H-H-C,
In addition to being used in four modes: H-C-C and H-C-C, it also takes a long time to cool down, which previously occurred when the right chamber was switched from heating chamber H to cooling chamber C. It is possible to solve the problem of not being able to sell various products, and to make each of the three rooms extremely suitable for the sale of various products.

[Brief explanation of the drawing]

Fig. 1 is an internal front view of a vending machine equipped with an internal cooling device showing an embodiment of the present invention, Fig. 2 is an electric circuit diagram showing the sequence for internal cooling and heating, and Fig. 3 is a conventional vending machine. FIG. 4, which is an internal front view of a vending machine equipped with an internal cooling device, is an electric circuit diagram showing the sequence. 3... Internal cooling device, 4... Compressor, 6... Refrigerant piping, 6L, 6N... Branch pipe, 7L, 7N... Evaporator, 8L, 8N... Cooling thermostat, 9
L, 9N...Solenoid valve, 11...Shutter, 12...
- Ventilation hole, L... left ventricle, M... middle ventricle, N... right ventricle. Figure 1 Figure 2

Claims (1)

[Claims] 1) An evaporator installed in each of the left and right chambers of a vending machine whose interior is divided into three chambers, a left chamber, a middle chamber, and a right chamber, and circulating and supplying refrigerant to these evaporators. It consists of one compressor and a vent opening in the partition wall between the right ventricle and the middle chamber and equipped with a shutter that can be opened and closed. In the internal cooling device of a vending machine for use as a cooling chamber, a thermostat for detecting the cooling temperature in the room is installed in each of the left and right chambers, and a solenoid valve that is operated via each of the thermostats is installed. An internal cooling device for a vending machine, characterized in that the refrigerant piping that guides refrigerant from the compressor is inserted into branch pipes to the left chamber and the right chamber, respectively.