JPH0415220Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an ozone-type deodorizing device used in storages such as refrigerators.
This invention relates to a safety circuit for a deodorizing device that stops ozone generation when an electric blower malfunctions.

[Conventional technology]

Generally, a deodorizing device using an ozone generator is installed in the ventilation path of a closed space such as a refrigerator.
A high-voltage power generator, a deodorizing catalyst, and an electric blower are installed.The electric blower takes in air containing odor components, and the mixed air, which is a mixture of this air and ozone generated by an ozone generator, is brought into contact with the deodorizing catalyst. The odor components are decomposed by the oxidizing action of ozone, and the excess ozone is decomposed and returned to oxygen, which is then released into the warehouse or the like.

[The problem that the idea attempts to solve]

However, in the deodorizing device with the above structure, if the motor connection of the electric blower for forced circulation is disconnected and stops working, the ozone generated by the ozone generator will flow back from the air intake port of the deodorizing device, causing the refrigerator to dry. There was a problem that the ozone could leak into closed spaces such as indoor spaces, exceeding the safety standard concentration of ozone, and potentially harming the human body.

The present invention was developed to solve these problems, and includes a disconnection detection circuit that detects disconnection in the motor connection of an electric blower. When a disconnection is detected, high voltage is applied to the ozone generator. It is an object of the present invention to provide a safety circuit for a deodorizing device that stops the operation of a high-voltage power generator that supplies it.

[Means to solve the problem]

In order to achieve the above object, this invention is a deodorizing device that is installed in the ventilation path of a storage room and is composed of an ozone generator, a high-voltage power generator, a deodorizing catalyst, and an electric blower. A disconnection detection circuit for detecting a disconnection in the motor connection of the electric blower is provided between the driving power source, and when this disconnection detection circuit detects a disconnection in the motor connection, a high voltage is supplied to the ozone generator. The present invention is characterized in that the operation of the high-voltage power generation device is stopped.

[Effect]

In the above configuration, when the motor connection of the electric blower is disconnected, the disconnection detection circuit is activated and the operation of the ozone generator's high voltage power supply generator is stopped, so the ozone generation from the ozone generator is stopped and the deodorizing device This prevents ozone from leaking outside.

〔Example〕

Hereinafter, the present invention will be described in detail based on drawings showing embodiments thereof.

FIG. 1 is an electric circuit diagram showing an embodiment of the safety circuit of the deodorizing device of the present invention, and FIG. 2 is a schematic diagram of the conventional deodorizing device and the deodorizing device according to the present invention.

In FIG. 2, reference numeral 1 denotes a refrigerating compartment of a refrigerator-freezer, and a partition wall 3 forming a ventilation passage 2 is provided at the rear of the refrigerator compartment. An ozone generator 5 that is supplied with ozone and generates ozone, a deodorizing catalyst 6 that promotes the oxidative decomposition of this ozone and malodorous components and decomposes excess ozone into oxygen, and an electric motor that forcibly circulates the air inside the refrigerator. A blower 7 is provided.

Reference numeral 8 indicates an air intake port provided in the upper part of the ventilation passage 2, 9 indicates an air discharge port formed in the front surface of the electric blower 7, and 10 indicates an opening/closing door that covers the opening of the refrigerator compartment 1.

Next, in FIG. 1, 11 is a control circuit equipped with a general one-chip microcomputer, and the one-chip microcomputer includes a program ROM, data RAM,
It has an ALU and is driven by a reference clock oscillation circuit 12.

The control circuit 11 controls the high-voltage power generator 4, the ozone generator 5, and the electric blower 7.
is coming under control.

Reference numeral 13 denotes a triax for controlling energization of the electric blower 7 based on the control signal from the control circuit 11, and 14 a disconnection detection circuit for detecting disconnection of the motor connection of the electric blower 7.

This disconnection detection circuit 14 includes a resistor 15 connected in series to the electric blower 7, a series circuit of a diode 16 and a capacitor 17 connected in parallel to the resistor 15, and a photocoupler 18 connected to both ends of the capacitor 17. When the electric blower 7 is operating normally, a minute AC voltage is generated across the resistor 15, and this AC voltage is converted to a DC voltage by the diode 16 and capacitor 17, and as a result, the The light emitting diode in the photocoupler 18 turns on, and the photocoupler 18
A phototransistor (no reference numeral) inside is turned on to notify the one-chip microcomputer 11 that the electric blower 7 is operating normally.

When a disconnection occurs in the motor connection of the electric blower 7, no current flows through the resistor 15, so no voltage is generated across the capacitor 17, the light emitting diode in the photocoupler 18 is turned on, and the control circuit 11 It is determined that the motor connection No. 7 is disconnected.

When the control circuit 11 detects a break in the motor connection of the electric blower 7, it stops supplying high voltage to the high voltage power supply generator 4, and therefore stops generating ozone from the ozone generator 5. Note that 19 is the main switch of the deodorizing device.

Therefore, according to the present invention, when the main switch 19 is closed, the high-voltage power generator 4 and the electric blower 7 are energized, the ozone generator 5 generates ozone, and the electric blower 7 takes in ozone into the refrigerator. The malodorous components contained in the air are decomposed by the ozone and the deodorizing catalyst.

Then, when a wire breakage occurs in the motor connection of the electric blower 7 for some reason during operation of the deodorizing device and the air blowing stops, the wire breakage detection circuit 14 detects the wire breakage, and the control circuit 11 detects the wire breakage from the wire breakage detection circuit 14. When a disconnection is detected by the signal, the power supply to the high voltage power supply generator 4 is stopped. Therefore, ozone is not generated from the ozone generator 5, and ozone is prevented from flowing into the refrigerator due to stopping of the electric blower 7.

[Effect of idea]

Since the present invention is configured as described above, when a disconnection occurs in the motor connection of the electric blower, the power supply to the high voltage power supply generator is immediately stopped, and the generation of ozone from the ozone generator is also stopped. Therefore, it is possible to prevent high-concentration ozone from leaking into the refrigerator, and also to prevent adverse effects on the human body, thereby increasing safety.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of the safety circuit of the deodorizing device of the present invention, and FIG. 2 is a schematic diagram of the conventional deodorizing device and the deodorizing device according to the present invention. 2...Ventilation path, 4...High voltage power supply generator, 5...
... Ozone generator, 6 ... Deodorizing catalyst, 7 ... Electric blower, 11 ... Control circuit, 14 ... Disconnection detection circuit.

Claims (1)

[Scope of claim for utility model registration] Ozone generator installed in the ventilation path of the storage room,
In a deodorizing device consisting of a high-voltage power supply generator, a deodorizing catalyst, and an electric blower, a disconnection detection circuit is provided between the electric blower and the power source that drives the electric blower to detect a disconnection in the motor connection of the electric blower. A safety circuit for a deodorizing device, characterized in that when this disconnection detection circuit detects a disconnection in the motor connection, the operation of a high voltage power supply generator that supplies high voltage to the ozone generator is stopped.