JPH01258375A - Plug adaptor - Google Patents

Abstract

PURPOSE:To make it possible to control an electric product automatically responding to the temperature or the humidity by providing a temperature sensor or a humidity sensor at the position linking to permeating holes at the side surface of a case, and operating a relay depending on the output of the sensor. CONSTITUTION:From the upper and the lower case 1, a plug 2 is projected, and at the other side of the case 1, a socket 3 is formed. The plug 2 and contacts 4 are connected to a base plate 5 in the case 1, a thermistor 6, a control IC 7, and the like are installed at the surface of the base plate 5, while a humidity sensor is formed at the rear side of the base plate 5. Furthermore, permeating holes 9 are formed on the outer surface of the case 1, through which the air inside and outside the case 1 can be circulated. When this plug adaptor is used for a kitchen fan, for example, and a heating cooking is carried out under the fan, the heat or the steam from the cooking converts the potential of the thermistor 6 and the humidity sensor, and when the value exceeds a specific standard value, the output of a comparator is converted from L to H to operate a relay, and the power is fed to the plug of the kitchen fan.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is a device that is installed between the plug of an electrical appliance such as a ventilation fan and an outlet in the home, and automatically controls the electrical appliance according to the temperature and humidity. Regarding the plug adapter that controls the.

[Conventional technology]

Conventionally, for example, a household ventilation fan was left plugged into an outlet, turned on manually when cooking, etc., and then manually turned off again when it was no longer needed.

[Problem to be solved by the invention]

In the case of the above-mentioned conventional technology, the switch must be turned on manually each time, so people sometimes forget to turn it on when cooking, or they cook without turning it on due to the hassle, resulting in steam and smoke filling the kitchen and unpleasant smells. There were cases where oily smoke was left behind.

It is also possible to incorporate sensors into electrical products such as ventilation fans to automatically control the electrical products based on temperature and humidity, but in this case, it cannot be used with existing products and the ventilation fan, etc. must be replaced. The problem is that it is a heavy burden on the user.

This invention was made in view of the above-mentioned problems with the conventional technology, and provides a plug adapter that can automatically control electrical products according to temperature and humidity, is inexpensive, and is easy to handle. The purpose is to

[Means to solve the problem]

In this invention, a plug and a socket are provided on the side surface of the case, and a through hole is formed on the side surface of the case.
At least one of a temperature sensor and a humidity sensor is provided in a position communicating with this through hole, and a relay is actuated by the output of a comparator that compares the output of these sensors with a predetermined reference value. This is a plug adapter that connects to the contacts of a socket.

[For production]

The plug adapter of the present invention is adapted to control power supply to an electrical product plugged into a socket depending on temperature and humidity.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 to 4 show a first embodiment of the present invention, and the plug adapter of this embodiment has a plug 2 protruding from upper and lower cases 1 made of synthetic resin, and a case 1.
A socket 3 is formed on the other side. Inside the case 1, there is a spring member 4a that forms the contact 4 of the socket 3.
are provided corresponding to the holes of the socket 3. The plug 2 and contacts 4 are connected to the terminals of a board 5 inside the case 1, and a thermistor 6 as a temperature sensor, a control IC 7, and other circuit elements (not shown) are attached to the front surface of the board 5, and the back surface A humidity sensor 8 is formed by printing electrodes 8a in a comb-like shape. moreover,
A through hole 9 is formed on the outer surface of the case 1, allowing air to circulate inside and outside the case 1.

The control circuit of this plug adapter will be explained based on FIG. 4.

The plug 2 is connected to a transformer 10, and the secondary output of the transformer 10 is connected to a rectifier circuit 11 and a power supply circuit 12, and the output of this power supply circuit 12 is connected to each IC and electronic element. Furthermore, the output of the predetermined voltage of the power supply circuit 12 is connected to the thermistor 6, and the potential of the thermistor 6 is connected to the non-inverting input part of the comparator 13. Also, comparator 1
A predetermined reference voltage is input to the inverting input section 3. The output of this comparator 13 is input to the base of a transistor 14. A relay 15 is connected to the collector side of the transistor 14, and a contact 4 between the plug 2 and the socket 3
A contact 15a of a relay 15 is provided in series between the two.

Further, in the circuit including the humidity sensor 8, the output of the oscillation circuit 16 is connected to a buffer 17, and the output of the buffer 17 is adjusted to a predetermined potential and input to the humidity sensor 8. The humidity sensor 8 is connected in series to a thermistor 18 for temperature compensation, and the humidity sensor 8
is connected to the amplifier 19 and the rectifying and smoothing circuit 20,
The DC voltage obtained by this rectifying and smoothing circuit 20 is input to a non-inverting input section of a comparator 21. Also, comparator 2
A predetermined reference voltage is input to the inverting input section No. 1.

The output of the comparator 21 is input to the base of the transistor 14.

When the plug adapter of this embodiment is used, for example, in a ventilation fan, the plug of the ventilation fan is inserted into the socket 3 of the plug adapter, and the plug 2 of the plug adapter is inserted into a household electrical outlet. When the ventilation fan is turned on and cooking is performed under the ventilation fan, the resulting heat or steam causes the potentials of the thermistor 6 and humidity sensor 8 of the plug adapter to change, and when they exceed a predetermined standard value, the comparison is made. The output of the transistor 13 or 19 changes from LOW to the old GH, and the transistor 14 turns ON. This activates the relay 15, closes the contact 15a, and supplies power from the commercial power source to the contact 4 of the socket 3 into which the plug of the ventilation fan is inserted. Here, the output of comparator 13.19 is the transistor 1
4 is input in the form of an OR, so the ventilation fan is activated when either the temperature or the humidity exceeds a predetermined value.

According to the plug adapter of this example, it automatically detects heat and humidity and starts or stops the ventilation fan, so if you forget to turn on the ventilation fan or turn it off. No more forgetting.

Next, a second embodiment of the plug adapter of the present invention will be described with reference to FIGS. 5 and 6. Here, the same members as those in the first embodiment are given the same reference numerals and the description thereof will be omitted.

In this embodiment, a plug portion 25 having a plug 2 on one side of the case 1 is provided so as to be swingable about a swing shaft 26 with respect to the case 1 . Further, sockets 3 are formed on other plurality of side surfaces of the case 1, a slit-shaped through hole 9 is provided in a part of the side surfaces, and an LED is provided on the top surface of the case 1.
Alternatively, a display section 27 such as an LCD is provided.

As shown in FIG. 6, a board 5 is housed inside the plug adapter of this embodiment, and a thermistor 6,
A control IC 7, a humidity sensor 8, and other electronic elements such as resistors and capacitors are attached. This board 5 is
The base end of the plug 2 is connected to the flexible lead wire 28 so that no force is applied to the connection terminal even if the case 1 swings. Further, a spring member 4a of a contact 4 is attached to the inside of the socket 3 (the contacts on both sides are omitted in the figure), and is connected to a circuit on a board 5.

The control circuit of this embodiment is also similar to that in FIG.
There are three sockets, and the LC of the display section 27
A drive IC (not shown) for driving D and the like is further provided.

This plug adapter has 6 thermistors and 8 humidity sensors.
The output is digitized and displayed on the display unit 27, and the power supply to the plug inserted into the socket 3 is controlled according to a predetermined temperature or humidity, and the ventilation fan etc. is turned on.
Turn off.

According to this plug adapter, the temperature and humidity can be displayed on the display section 27.
This is convenient for the user, and since the case 1 is swingable with respect to the plug 2, the display section 27
The angle can be adjusted for easy viewing. Furthermore, since a plurality of sockets 3 are provided, a plurality of electrical appliances can be controlled simultaneously by temperature or humidity. In this case, it is also possible to provide separate comparators so that the reference value for feeding power to each socket can be arbitrarily set separately.

Note that either the humidity sensor or the temperature sensor may be formed on the substrate by printing, or may be attached to the substrate separately.

〔Effect of the invention〕

The plug adapter of this invention controls the power supply to the contacts of the socket by a sensor installed inside the case, so you can insert this plug adapter into a household outlet and connect the plug of a ventilation fan etc. to the socket of this plug adapter. Just by plugging it into the device, you can automatically control the ventilation fan based on temperature, etc.

Furthermore, the plug adapter can be used with existing electrical products by simply inserting it into an outlet, making it extremely versatile.

[Brief explanation of the drawing]

Fig. 1 is a plan view with the upper case removed of a first embodiment of the plug adapter of this invention, Fig. 2 is a perspective view of a board provided inside the plug adapter of this embodiment, and Fig. 3 is a plan view of this embodiment. 4 is a circuit diagram of the control circuit of this embodiment, FIG. 5 is a perspective view of a second embodiment of the plug adapter of this invention, and FIG. 6 is a diagram of the plug adapter of this embodiment. FIG. 3 is a plan view with the upper case removed. 1...Case, 2...Plug, 3...Socket,
4... Contact, 5... Board, 6... Thermistor (temperature sensor) 8... Humidity sensor, 9... Through hole, 1
3.21... Comparator, 15... Relay Fig. 3 Fig. 1 Plug-in Fig. 6

Claims (1)

[Claims] 1. A plug adapter that has a socket provided on the side of the case and a plug protruding from the other side of the case, and this plug can be plugged into a commercial power outlet in the home, with a socket that is transparent to the case. At least one of a temperature sensor and a humidity sensor is provided at a predetermined position in a case that has a hole and communicates with the outside air through the hole, and the output of each sensor is compared with a predetermined reference value. A plug adapter characterized in that it is provided with a relay whose operation is controlled by the output of the comparator and which opens and closes the connection state between the plug and the contacts of the socket.