JPH0525567U - Frequency switching device for vending machines - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a frequency switching device for a vending machine capable of automatically performing frequency switching. [Structure] Frequency detection circuit 1 for detecting the frequency of an AC power supply
2 detects the frequency of the AC power supply. Further, the frequency of the device using the AC power supply is automatically switched to the frequency of the AC power supply detected by the frequency switching circuit 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a frequency switching device for a vending machine.

[0002]

[Prior Art]

 Generally, in an automatic vending machine, an AC power source such as a ballast for a lighting circuit, a heater for a heating circuit, a motor for a cooling circuit, and a timer for a sales control circuit is used as shown in Japanese Utility Model Publication No. 60-12206. There are many devices. In a lighting circuit that uses a fluorescent lamp as a signboard lamp and an interior lamp, a ballast 3 and a glow starter 4 for lighting the fluorescent lamp 2 are required like the lighting circuit 1 in the circuit configuration diagram shown in FIG. However, in order to operate the ballast 3, it is necessary to correspond to the frequency (50 Hz, 60 Hz) of the place where the vending machine is installed.

In order to make the ballast 3 correspond to the frequency of the installation place, conventionally, the switch or connector of the frequency switching unit 5 has to be switched to correspond to the frequency of the installation place of the ballast 3. There is. Similarly, with respect to the heater of the heating circuit 6, the timer of the sales control circuit 7, and the motor of the cooling circuit 8, the frequency is switched by switching the switch or the connector.

[0004]

[Problems to be solved by the device]

 However, such switching of the frequency of the ballast 3 must be performed each time depending on the place where the vending machine is installed, and the switch or connector switching in the frequency switching unit 5 is performed manually. , It was time-consuming.

An object of the present invention is to provide a frequency switching device for a vending machine which can automatically switch frequencies.

[0006]

[Means for Solving the Problems]

 The present invention provides a frequency detection circuit for detecting the frequency of an AC power supply, and a frequency switching circuit for automatically switching the frequency of a device using the AC power supply to the frequency of the AC power supply detected by the frequency detection circuit. It is equipped with and.

[0007]

[Action]

 With this configuration, the frequency of the AC power supply can be detected, and the frequency of the device using the AC power supply can be automatically switched to the detected frequency of the AC power supply.

[0008]

【Example】

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

FIG. 1 is a circuit configuration diagram of a frequency switching device of a vending machine according to an embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 3 indicate the same or corresponding portions.

In the figure, 9 is a switching relay for switching the frequency switching contact 10 to 60 Hz or 50 Hz by a switching signal of a frequency switching device described later. Reference numeral 11 is a frequency switching device for automatically determining the frequency of the power source after switching on the ballast 3 by determining whether the frequency of the power source is 50 Hz or 60 Hz when the power is turned on after the vending machine is installed. .

The frequency switching device 11 operates the frequency detecting circuit 12 that determines whether the frequency of the power source is 50 Hz or 60 Hz when the power is turned on, and operates the switching relay 9 according to the detection result of the frequency detecting circuit 12. It has a frequency switching circuit 13 for switching the frequency switching contact 10.

Next, the frequency switching operation of the frequency switching device of the vending machine thus configured will be described.

Now, for example, when an AC power supply of 50 Hz is turned on to the newly installed vending machine, the AC power thus turned on is input to the frequency detection circuit 12 of the frequency switching device 11. Here, the frequency detection circuit 12 detects that the AC power source is 50 Hz, and inputs this detection signal to the frequency switching circuit 13.

Here, if the frequency switching contact 10 is switched to the 60 Hz side, for example, the operation of the switching relay 9 by the frequency switching circuit 13 switches the frequency switching contact 10 to the 50 Hz side.

As described above, when the power is turned on, it is determined whether the frequency of the power source is 50 Hz or 60 Hz, and the switching relay 9 is operated to automatically switch the frequency of the ballast 3. By providing it, the frequency can be automatically switched.

In the above description, the case where a frequency switching device 11 having a frequency detection circuit 12 and a frequency switching circuit 13 is newly added to the circuit configuration diagram of the conventional vending machine shown in FIG. Although described, the present invention is not limited to this, and a frequency switching circuit 13 may be added to the frequency detection circuit 12 provided in the heating device 6 as shown in FIG. 2, for example.

Here, the frequency detection circuit 12 of the heating device 6 detects the frequency by obtaining the cycle of the power source using a triac in order to adjust the amount of current flowing through the heater. By transmitting the frequency information detected by the detection circuit 12 to the newly provided frequency switching circuit 13, the switching relay 9 can be operated to automatically switch the frequency.

In addition, the frequency information detected by the frequency detection circuit 12 is transmitted to the frequency switching circuit 13 and the switching relay 9 of the lighting circuit 1 is operated to switch the frequency of the ballast 3. It is also possible to provide a switching relay for the timer of the sales control circuit 7 and the motor of the cooling circuit 8 which are required, and automatically switch the frequency according to this frequency information.

[0019]

[Effect of the device]

 As described above, according to the present invention, the frequency of the AC power supply can be detected, and at the same time, the frequency of the device using the AC power supply can be automatically switched to the detected frequency of the AC power supply. Therefore, it is possible to save the trouble of switching the frequency due to the installation of the vending machine.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a frequency switching device of a vending machine according to an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram in which a frequency switching circuit is added to the heating device of the frequency switching device.

FIG. 3 is a circuit configuration diagram of a conventional frequency switching device of a vending machine.

[Explanation of symbols]

 1 Lighting Circuit 3 Ballast 6 Heating Device 9 Switching Relay 10 Frequency Switching Contact 11 Frequency Switching Device 12 Frequency Detection Circuit 13 Frequency Switching Circuit

Claims (1)

[Scope of utility model registration request] 1. A frequency detection circuit for detecting the frequency of an AC power supply, and a frequency switching for automatically switching the frequency of a device using the AC power supply according to the frequency of the AC power supply detected by the frequency detection circuit. A frequency switching device for a vending machine, comprising a circuit.