JPH0431473Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a ventilation fan that is installed above a range and controls the blower by detecting the temperature.

[Conventional technology]

FIG. 2 is a sectional view showing a conventional ventilation fan disclosed in, for example, Japanese Utility Model Application Publication No. 50-150151. This blower is provided inside the main body casing, and is composed of an electric motor 5, a blade casing 6, and blades 7. Reference numeral 8 denotes a lower casing which is provided to cover the above-mentioned opening and forms a suction port 9, and 10 and 11 are high-temperature side temperature sensors formed by a thermistor, which are provided facing each other across the suction port 9 of the lower casing, and are not shown in the figure. A lead wire that is not connected to the control box 14 is connected to the control box 14 via an intermediate connection terminal. Reference numeral 12 denotes a low-temperature side temperature sensor which is provided to protrude from the upper surface of the main body casing 1 and detects the room temperature, and is connected to the control box. 13 is a range.

The conventional ventilation fan is configured as described above, and when cooking is performed using the range 13, the high temperature side temperature sensors 10 and 11 detect the heat and compare it with the temperature detected by the low temperature side temperature sensor 12. . If the temperature difference based on this comparison exceeds a predetermined value, the blower 4
is automatically operated to suck in combustion exhaust gas etc. from the suction port 9 and discharge it to the outside through the blow-off port 3.

[Problem that the invention attempts to solve]

In the conventional ventilation fan as described above, the lower casing 8 cannot be removed until the lead wires of the high-temperature side temperature sensors 10 and 11 have been disconnected from the intermediate connection terminals, which makes the work troublesome. The dot was hot.

This idea was made in order to solve this problem, and the purpose is to obtain a ventilation fan that allows the lower casing to be opened without removing the intermediate connection terminals one by one, and allows for easy maintenance inside the main casing. It is something to do.

[Means for solving problems]

In the ventilation fan according to this invention, the lead wire of the temperature sensor is wired into the main casing from the rotating portion side of the main casing and the lower casing.

[Effect]

In this invention, the lead wire of the temperature sensor is wired into the main casing from the rotating part side of the main casing and the lower casing, so the lower part of the main casing can be opened without removing the lead wire from the lower casing. This makes maintenance inside the main body casing easier.

〔Example〕

FIG. 1 is a cross-sectional view showing an embodiment of this invention, in which 1 to 12 indicate the same or equivalent parts as the above-mentioned conventional example, 20 a ventilation hole provided in the front inclined part of the main casing 1, 21 is a duct connecting member provided facing the air outlet 3 of the main casing 1;
A wind pressure shutter 22 is installed inside. 23 is a front casing forming the front surface of the main body casing 1, and a bent portion 25 is provided so that the switch operating member 24 is flush with this front casing;
A screw 27 is provided into which a thumbscrew 26 is threaded. Reference numeral 28 denotes a partition plate that partitions the inside of the main body casing 1 into a ventilation chamber 29 and an electrical component chamber 30, and a bush 31 through which the high temperature side temperature sensors 10 and 11 pass is attached. Numerals 32 and 33 are gaskets formed of an elastic material and provided above and below this partition plate.
are respectively provided between the lower casing 8,
The ventilation chamber 29 and the electrical parts chamber 30 are isolated from each other.
Reference numeral 34 denotes an L-shaped sensor mounting member fixed to the lower casing 8 by screws 35 at predetermined intervals, and a bush 36 is provided for mounting the high temperature side temperature sensors 10, 11.
The lead wire 60 is covered with a protective tube 37 and is provided with a knot 38 to prevent it from being inserted too far into the bush 36. It extends into a control box 47 which will be described later. Reference numeral 39 denotes a coupling piece provided at the lower back of the lower casing 8, which is rotatably engaged with an engaging member 40 provided at the lower back of the main casing 1. 41 is a hole provided in the front of the lower casing 8 through which the thumbscrew 26 passes; 42 is a filter provided in a recess 43 provided in the lower casing 8 to cover the suction port 9;
It is made of punched metal with 4 screws.
5 to the lower casing 8. 4
6 is a grease filter attached to this filter,
Reference numeral 47 denotes a control box provided in the electrical component room 30, the switch operating member 24 is attached to the front surface, and each temperature sensor 10, 1 is installed inside, although not shown.
1 and 12 are connected to each other, a control circuit for controlling the electric motor 5 of the blower 4 is provided, a switch 48 for switching between forced operation and automatic operation is provided at the bottom, and lead wires 60 for each of the temperature sensors 10, 11, 12 are connected.
is inserted from the top and connected to the control circuit. 55 is a fixture for the electric motor 5, and 56 is a mounting screw for the blade 7.

In the ventilation fan configured as described above, when cooking is performed using the microwave, the high temperature side temperature sensors 10 and 11 detect the heat, and compare it with the room temperature detected by the low temperature side temperature sensor 12. When the temperature difference resulting from this comparison exceeds a predetermined value, the blower 4 is automatically operated by a control circuit provided in the control box 47, and the combustion exhaust gas, oil smoke, etc. from the range are passed through the filter 42 and the grease filter 46 into the suction port. 9 into the ventilation chamber 29, and the air outlet 3
The air is discharged to the outside through a duct (not shown) connected to the duct connecting member 21. In this way, the lead wire 60 is routed from the rotating part of the main body casing 1 and the lower casing 8 into the main body casing 1 and connected to the inside of the control box 47, without using an intermediate connection terminal as in the conventional case. Therefore, lower casing 8
There is no need to remove the lead wire 60 of the high temperature side sensor each time the lower part of the main body is opened, and maintenance inside the main body casing 1 can be easily performed.

Note that by switching the switch 48, automatic operation can be changed to forced operation.

Furthermore, the number of high-temperature side temperature sensors 10 and 11 is not necessarily two, and may be one.

[Effect of idea]

As explained above, this invention includes a main body casing provided with an air outlet, a lower casing rotatably attached to the lower part of this main body casing and provided with a suction port, and a blower provided within the main body casing. A control box is provided in the main casing via the blower and a partition plate, and a temperature sensor is connected to the control box via a lead wire and is provided in the lower casing facing the suction port. By wiring the lead wire of the temperature sensor into the main body casing from the rotating part side of the main body casing and the lower casing, the lower part of the main body casing can be opened without removing the intermediate connection terminals one by one as in the conventional case. can be made,
This has the effect of making maintenance inside the main body casing easier.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention, and FIG. 2 is a sectional view showing a conventional ventilation fan. In addition, the same reference numerals in each figure indicate the same or equivalent parts, 1 is the main casing, 3 is the air outlet, 4 is the blower, 8 is the lower casing, 9 is the suction port, 10,
11 is a high temperature side temperature sensor, 12 is a low temperature side temperature sensor, 28 is a partition plate, 47 is a control box, and 60 is a lead wire.

Claims (1)

[Scope of utility model registration request] A main body casing provided with an air outlet, a lower casing rotatably attached to the lower part of this main body casing and provided with a suction port, a blower provided in the main body casing, and a blower and a partition plate. A control box provided within the main body casing;
a temperature sensor connected to the control box via a lead wire and provided in the lower casing facing the suction port; A ventilation fan characterized in that wiring is connected inside the main body casing from the side.