JPH0668790B2 - Water supply controller for vending machines - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water supply control device for a vending machine.

2. Description of the Related Art Conventionally, a water supply control device for a vending machine is disclosed in, for example, Japanese Patent Laid-Open No.
The device was as shown in Fig. 3 of No. 210267. In FIG. 3, reference numeral 1 is a water reservoir for storing water from tap water. Reference numeral 2 is a water level detection device for detecting the water level of the water reservoir 1. Reference numeral 3 is a water supply valve for supplying tap water to the water reservoir 1. Reference numeral 4 denotes an ice making machine, which, as is well known, comprises an evaporator, an ice making section 41 containing an auger, and an ice storage chamber 42. Reference numeral 5 is a water pump for supplying water that has passed through the water reservoir 1 and the ice maker 4 to the beverage sales line A. 6 is a carbonator tank for manufacturing and storing carbonated water, 7 is a cold water valve for switching between dilution water and the carbonator tank 6, and 8 is a carbonated water valve for controlling discharge of carbonated water. Reference numeral 9 is a cold water coil for cooling water. Reference numeral 10 is a main running water line connecting the water reservoir 1 and the water pump 5. Reference numeral 11 is a dilution water line that is piped through the water pump 5, the cold water coil 9, and the cold water valve 7 to the bend stage where the cup 12 is carried out. A syrup line 13 is piped from the syrup tank 14 through the syrup valve 15 to the bend stage. Reference numeral 16 denotes a carbonated water line that branches from the dilution water line 11 via the cold water valve 7 as a three-way valve and is piped to the bend stage via the carbonator tank 6 and the carbonated water valve 8.

The operation of the water supply control device for a vending machine configured as described above will be described below.

First, the water reservoir 1 is supplied with water from the tap water and is maintained at a constant water level. The ice making machine 4 receives water from the water reservoir 1 and always stores the ice made in the ice making section 41 in the ice storage chamber 42. When a sales command is given from here, the syrup valve 15 is opened according to a predetermined program to supply the syrup to the cup 12, and at the same time, the cold water is supplied to the cup 12 by starting the water pump 5 and opening the cold water valve 7. In addition, the carbonated water valve 8 is opened according to the selection of the product, and the carbonated water is supplied to the cup 12 from the ice making machine 4. At this time, the water reservoir 1
Although the water in the inside decreases, when the water level detecting device 2 detects the decrease in the water level, the water supply valve 3 opens to supply tap water to the water reservoir 1. Then, when the water level in the water reservoir 1 reaches a predetermined level by the water supply and the water level detection device 2 detects it, the water supply valve 3 is closed and the water supply from the tap water is stopped.

Problems to be Solved by the Invention However, in the above-mentioned configuration, since tap water is directly supplied to the water reservoir, if the tap water cannot be directly drawn depending on the installation location of the vending machine, There was a problem that beverages could not be sold from the vending machine.

In view of the above problems, the present invention provides an automatic vending machine that can sell beverages from the automatic vending machine even at a place where the automatic vending machine cannot be directly drawn with tap water.

Means for Solving the Problems In order to solve the above problems, the water supply control device of the vending machine of the present invention has
A sub water flow line from the water tank to the water reservoir is provided via the first and second three-way valves, and the first and second three-way valves are used when a low water level is detected by a water level detection device that detects the water level in the water reservoir. Is switched to connect the sub water flow line.

Operation The present invention has the above-described configuration, and when the water level detection device detects that the water level in the water reservoir is "low", it simultaneously detects that the selling operation is completed, and the first three-way outlet Switch the valve from the main running water line to the water supply rank,
Switch the three-way valve from the beverage sales line to the sub water flow line to supply water from the water tank to the water reservoir. When the water level detector detects that the water level in the water reservoir is "high," the first three-way valve is switched from the sub tank to the main water circuit, and the second three-way valve is moved from the sub water line to the beverage sales line. Switch to the normal sales standby state. Therefore, even at the location of the vending machine where tap water cannot be drawn directly,
Beverages can be sold.

Embodiment Hereinafter, a water supply control device for a vending machine according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a water supply controller for an automatic vending machine according to an embodiment of the present invention. In FIG. 1, 1 to 16 are the same as those in FIG. 3, and the description thereof will be omitted. 17 is a water supply tank, which contains a large amount of tap water stored beforehand. Reference numeral 18 denotes a first three-way valve provided at the suction port of the water pump 5. The main flowing water line 10 is on the normally open side of the inlet (hereinafter referred to as NO side), and the normally open side of the inlet (hereinafter, A water supply tank 17 is connected to the NC side), and a suction port of the water pump 5 is connected to a common outlet (hereinafter referred to as the C side). Reference numeral 19 is a second three-way valve provided on the outlet side of the water pump 5, and the beverage sales line A is on the normally open side of the outlet (hereinafter referred to as NO side) and the normally closed side of the outlet (hereinafter, The sub water flow line 20 is connected to the NC side), and the suction port of the water pump 5 is connected to a common inflow port (hereinafter referred to as the C side). Second
The figure is an electric circuit diagram of water supply control, 21 is the water level detection device 2
This is a switch that electrically switches the first and second three-way valves when "high" or "low" is detected in. Reference numeral 22 is a relay controlled by the control means. Reference numeral 23 is a first contact of the relay 22, and 24 is a second contact of the relay 22.

Next, the operation of the configuration of this embodiment will be described.

First, the normal selling operation is the same as the conventional example, and will be omitted.

The running water circuit consists of the water reservoir 1 → the main running water line 10
→ First three-way valve 18 (NO side-C side open) → Water pump 5 → Second three-way valve 19 (C side-NO side open) → Beverage sales line A, running water circuit It is configured and operates according to a predetermined program. Then, when the water level in the water reservoir 1 decreases with the sale of the beverage, the switch of the water level detection device 2
21 closes and detects low water level. When the selling operation is completed by the control means, the relay 22 is de-energized, and the first contact 23 of the relay 22 moves to the NC side to shut off the water pump 5. At the same time, the second contact 24 also moves to the NC side to energize the first and second three-way valves 18, 19 and the water pump 5. And each of the above three-way valve, 18, 19 is NC side-C
It is opened between the sides, and the running water circuit is the sub tank 17 → the first three-way valve 18 (open between the NC side and the C side) → the sub running water line 20 →
Water is supplied to the water reservoir 1, and the water level of the water reservoir 1 is raised to a high level, and the water level detection device 3 detects the water level "high". Return to the running water circuit.

As described above, according to the present embodiment, the main water flow line 10, the water supply tank 17, and the water pump 5 are connected via the first three-way valve 18, and the water pump 5, the sub water flow line 20, and the beverage sales line A are connected. Is provided via the second three-way valve 19, the water pump for supplying the water in the water supply tank 17 can be shared by the water pumps 5 used in the conventional water flow circuit, and the cost can be reduced. Further, the space for the water pump for supplying the water in the water supply tank 17 is not required, so that the space can be saved.

As described above, according to the present invention, the main water flow line, the water supply tank, and the water pump are connected through the first three-way valve, and the water pump, the sub water flow line, and the beverage sales line are connected to the second three-way port. Since the connection is provided through the valve, the beverage can be sold even at the place of installation of the vending machine where tap water cannot be directly drawn, and further, the following effects can be obtained.

That is, according to the present invention, the water pump for supplying water within the water supply rank can be shared by the water pumps used in the conventional running water circuit, and the cost can be reduced. In addition, it is possible to save space because a dedicated space for a water pump for supplying water in the water supply tank is not required.

[Brief description of drawings]

FIG. 1 is a running water circuit diagram of a water supply control device for a vending machine according to an embodiment of the present invention, FIG. 2 is a water supply control circuit diagram for this embodiment, and FIG. 3 is a conventional water supply control device for a vending machine. It is a running water circuit diagram. A ... Beverage sales line, 1 ... Water reservoir, 2 ... Water level detector, 5 ... Water pump, 7 ... Cold water valve, 10 ... Main running water line, 15 ... Syrup valve, 17 ... Water tank ,
18,19 …… First and second three-way valves, 20 …… Sub running water line, 21 …… Switch, 22 …… Relay.

Claims (1)

[Claims] 1. A main flowing water line connecting a water reservoir and an inlet side of a water pump, and first and second three-way valves provided at an inlet side and an outlet side of the water pump, from a water supply tank to the water. A sub-flow line to a reservoir, the water supply tank is connected to a normally closed side inlet of the first three-way valve connected to the inlet side of the water pump, and the outlet side of the water pump The sub-flow line to the water reservoir is connected to the normally-closed side outlet of the second three-way valve connected between the outlet side of the water pump and the beverage sales line to detect the water level in the water reservoir. A water supply control device for a vending machine, which switches the first and second three-way valves to connect the sub-flow water line when a low water level is detected by the water level detection device.