JPS6032504Y2 - Ventilation fan operation control device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an operation control device for a ventilation fan that performs ventilation operation in rooms that are relatively hot and humid, such as a melting room and a kitchen.The purpose of the invention is to detect the temperature and humidity in the room, respectively. A changeover switch is provided with a temperature-sensitive switch and a humidity-sensitive switch that open and close with each other, and switches between intervening the temperature-sensitive switch and humidity-sensitive switch in series and in parallel with the current-carrying path of a fan drive motor. By providing a configuration in which ventilation is provided, ventilation operation can be automated and power consumption can be prevented.
An object of the present invention is to provide an operation control device for a ventilation fan that can perform optimal ventilation operation by sensing one or both of temperature and humidity.

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

1 is an AC power supply, and one output end of this is the main switch 2
The other output end is connected to the AC bus 4 through the AC bus 3 .

Reference numeral 5 denotes a humidity-sensitive switch, which opens and closes a microswitch by utilizing the action of a moisture-sensitive member such as hair or an organic cellophane film that expands and contracts depending on the surrounding humidity. The value can be adjusted as desired.

Reference numeral 6 denotes a temperature-sensitive switch, which is composed of, for example, a bimetal switch, and is closed when the temperature exceeds a set temperature, and its set value can be arbitrarily adjusted by selecting the amount of displacement of the bimetal.

Reference numeral 7 denotes an operation switch, which is composed of interlocking changeover switches 8 and 9 having fixed contact pieces a and b and movable contact piece C, respectively.

10 and 11 are ventilation fans and motors for driving them.

The ventilation fan is attached to the ventilation opening of the melting chamber (not shown), and the humidity-sensitive switch 5 and temperature-sensitive switch 6 are attached to the ceiling or ventilation fan of the melting chamber so as to be able to detect the humidity and temperature in the melting chamber, respectively. It is being

Thus, the AC bus 3 is branched into two, one end of which is connected to the fixed contact a of the changeover switch 9 via the moisture sensitive switch 5, and the other end connected to the fixed contact a of the changeover switch 8. ing.

Further, the fixed contact piece a of the changeover switch 9 is connected to the changeover switch 8.
The movable contact C of the changeover switch 9 is connected to the AC bus 4 via the motor 11, and the movable contact C of the changeover switch 8 is connected to the temperature sensitive switch 6. It is connected to the movable contact piece C of the changeover switch 9.

Next, the operation of this embodiment with the above configuration will be explained.

First, let's talk about usage in the summer, for example.
In the summer, the operation switch 7 is operated in advance to close the contacts ca and a of the changeover switches 8 and 9, and to close the manual switch 2.

When entering the port, when the temperature inside the welding chamber becomes high and the temperature-sensitive switch 6 closes, the motor 11 forms an energizing path 12 via the manual switch 2, the contacts a and c of the changeover switch 8, and the temperature-sensitive switch 6. Then, the fan 10 is rotated, and automatic ventilation operation is started.

Furthermore, when the humidity inside the welding chamber becomes too humid and the humidity-sensitive switch 5 closes, the motor 11 forms an energizing path 12 between the manual switch 2, the humidity-sensing switch 5, and the contacts a and C of the changeover switch 9. , automatic operation is started in the same manner as described above.

When the contact pieces 4 cm of the changeover switches 8 and 9 are closed as described above, the moisture-sensitive switch 5 and the temperature-sensitive switch 6 are connected in parallel and are interposed in the energizing path 12.
Automatic ventilation operation is performed when the melting chamber becomes either hot or humid.

Thereafter, when the humidity and temperature within the melting chamber become lower than the respective set values and the humidity-sensitive switch 5 and temperature-sensitive switch 6 are returned to open, the ventilation operation is automatically stopped.

On the other hand, let's talk about usage in winter, for example.
In winter, the operation switch 7 is operated in advance to close the contact pieces c and b of the changeover switches 8 and 9, and to close the manual switch 2.

Then, when entering the port, the temperature and humidity inside the welding chamber become high and the humidity-sensitive switch 5 and temperature-sensitive switch 6 close, respectively, and the motor 11 moves the humidity-sensitive switch 5. Contact piece b- of changeover switch 8
An energizing path 12 is formed between the fan 10 and the temperature-sensitive switch 6 to rotate the fan 10, thereby starting automatic ventilation operation.

As described above, when the contact pieces c and b of the changeover switches 8 and 9 are closed, the humidity-sensitive switch 5 and the temperature-sensitive switch 6
are connected in series and interposed in the energizing path 12, and automatic ventilation operation is performed only when the inside of the melting chamber is hot and humid.

Thereafter, when one of the humidity and temperature in the melting chamber falls below the set value and one of the humidity-sensitive switch 5 and the temperature-sensitive switch 6 returns to open, the ventilation operation is automatically stopped.

Incidentally, when it is desired to stop the above-mentioned actual ventilation operation in the middle or when it is desired not to perform the ventilation operation, the manual switch 2 is opened.

In this way, according to this embodiment, the ventilation operation is started and stopped based on the opening and closing of the humidity-sensitive switch 5 and the temperature-sensitive switch 6, which respectively detect the humidity and temperature inside the melt chamber, so that the ventilation operation can be automated. Therefore, unlike when starting and stopping ventilation operation by operating a manual power switch, for example, there is no need to worry about operations, and there is no need to forget to stop ventilation operation, which saves power. Waste can be prevented.

Further, according to the present embodiment, an operation switch is provided for selectively switching between the case where the humidity-sensitive switch 5 and the temperature-sensitive switch 6 are connected in series and interposed with respect to the current-carrying path 12 of the motor 11, and when they are connected in parallel and interposed therebetween. For example, by selecting parallel connection in the summer, automatic ventilation operation will be performed when one of the temperatures exceeds the set value for the humidity type. If either the temperature or humidity increases, you will feel uncomfortable.
For example, by connecting in series in the winter, automatic ventilation operation will be performed when both humidity and temperature exceed the set value, and therefore, in the winter, the If the ventilation operation is performed when the indoor temperature is not very high and only the humidity is high, the warm air inside the melting chamber will be exhausted outside, making you feel cold. Take precautions to prevent this from happening. As a result, optimal ventilation operation can be performed according to the environmental conditions.

In the above embodiment, a moisture-sensitive switch 5 that opens and closes a microswitch by the expansion and contraction of the moisture-sensitive member is used, but a moisture-sensitive resistive element may be used instead, or a bimetallic switch may be used. Instead of the temperature-sensitive switch 6, a switch using a temperature-sensitive resistance element may be used.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but may be modified as appropriate without departing from the gist, such as being applicable to a ventilation fan for a kitchen or the like. Of course.

As explained above, in the present invention, automatic ventilation operation is started when one or both of temperature and humidity are above set values, and automatic ventilation operation is stopped when temperature and humidity are below set values. Therefore, it is possible to provide a ventilation fan operation control device that can prevent power consumption and perform optimal ventilation operation according to environmental conditions.

[Brief explanation of drawings]

The drawing is an electrical circuit diagram showing an embodiment of the present invention. In the drawing, 5 is a moisture sensitive switch, 6 is a thermosensor blood, 7 is the operation switch, 8 and 9 are switching switches blood, 10 is a fan, 11 indicates a motor.

Claims (1)

[Scope of utility model registration request] A case in which a motor for driving a fan, a temperature-sensitive switch and a humidity-sensitive switch that open and close by detecting indoor temperature and humidity, respectively, and these temperature-sensitive switches and humidity-sensitive switches are interposed in series in the current-carrying path of the motor. An operation control device for a ventilation fan, comprising a changeover switch for switching between the case where the fan is interposed in parallel with the switch and the case where the fan is provided in parallel.