JPS5851559Y2 - Heater safety device mounting device - Google Patents

Description

[Detailed description of the invention] The present invention consists of a safety device for the heating machine that turns on and off the electric circuit for operating the heating machine, namely a temperature fuse, and a temperature overrise prevention device that detects a predetermined air temperature inside the heating machine, a so-called auto-cut switch. Regarding the mounting device.

Conventionally, it has been common for these types of safety devices to be installed separately.

Therefore, each mounting plate has a different shape and is spaced apart from each other.
Electric wires to connect these and devices to protect them were also required.

Furthermore, since these installation operations are performed separately, the number of parts required is doubly increased.

On the other hand, the temperature-sensing part of the over-temperature prevention switch device detects the air temperature inside the heater and turns the electric circuit on and off, but due to product variations, the critical temperature for over-temperature rise may vary depending on the product. This resulted in uneven quality.

The purpose of this invention is to provide a temperature fuse and an overtemperature prevention switch device on one mounting plate, and to make it possible to adjust the temperature sensing temperature of the overtemperature prevention switch device, thereby improving the installation ease of the safety device. The purpose is to reduce the variation in operating temperature of the prevention switch device.

That is, a temperature fuse installed in the electric circuit for controlling the operation of the heater and a temperature sensor detect the predetermined air temperature inside the heater, and the temperature is 0N.
- an overtemperature rise prevention switch device that turns OFF is attached to the same mounting plate such that the mounting plate is interposed between the temperature sensing section and the heat exchanger; A part of the mounting plate in the heater is cut and raised toward the heat exchanger side, and a guide plate is formed to control the temperature sensed by the temperature sensing part by guiding the heated air flow inside the heater to the temperature sensing part. It is a safety device attachment device.

In this configuration, since the temperature fuse and the overtemperature rise prevention switch device are mounted on one mounting plate, the number of parts of the mounting device can be reduced and the wiring etc. can be shortened, resulting in good mounting performance.

Further, by adjusting the angle at which the guide plate is cut and raised, the heat flux to the temperature sensing portion of the overtemperature rise prevention switch device can be changed, and the apparent sensing temperature above can be adjusted.

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

In FIGS. 1 and 2, 1 is a temperature overrise prevention switch device, 2 is a temperature fuse, 3 is a fuse holder, 4 is a mounting plate, and 5 is a wall of the main body of the heater.

The mounting plate 4 is fixed to the inner surface of the heater body wall 5 by means of fixing means such as fixing screws (not shown) in mounting holes 4b provided in the mounting legs 4a.

The temperature fuse 2 and the fuse holder 3 are fixed to the inner surface of the mounting plate 4 by six fixing screws.

The overtemperature rise prevention switch device 1 is mounted on its mounting bracket H'a.
is fixedly attached to the surface of the mounting plate 4 on the side of the heater main body wall 5 using fixing screws 7.

Reference numeral 8 denotes a guide plate cut and raised toward the heat exchanger side, which will be described later, for mounting the overtemperature rise prevention switch device 1 on the mounting plate 4, and its upper end extends from the switch device 1 at a predetermined angle with respect to the mounting plate 4. It is tilted away from you.

9 is an opening formed after the guide plate 8 is cut and raised.

Although not shown, the heat exchanger of the heater is composed of a combustor or the like, and is located inside and below the mounting plate 4 to heat the air sent from the blower.

The mounting plate of the present invention having the above structure has the following functions.

If the temperature fuse 2 is blown, the electric circuit is cut off by cutting off the supply of fuel or current to the heat exchanger, and the heating function is stopped.

When the overtemperature rise prevention switch device 1 detects that the air temperature inside the heater is higher than a predetermined value, a built-in bimetal switch is activated to stop the heating operation in the same way as above, to prevent the heater from overheating. It operates as a safety device.

In the action of such a safety device, the heat exchanger radiates radiant heat, but this radiant heat is blocked mainly by the guide plate 8 and the mounting plate 4, so the temperature sensing part of the temperature rise prevention switch device 1 detects the air temperature inside the heater. This will prevent malfunctions.

This guide plate 8 further guides the heated air sent through the heat exchanger away from the temperature sensitive part of the switch device 1, causing a vortex in the vicinity of the rear opening 9 and causing it to flow away.

Therefore, the temperature-sensing section senses the temperature of the air that is disturbed or stirred by this vortex, and senses a more accurate in-machine air temperature.

By adjusting the cutting and raising angle of the guide plate 8, it is possible to change the turbulence of the air flow and the influence of the radiant heat of the heat exchanger applied from the guide plate 8 to the temperature sensing part, and the switch device 1
The discrepancy between the actual operating temperature and the product specification temperature can be eliminated.

Therefore, if product variations are taken into account, the above adjustments can be made for each product, and the range of operating temperature variations of the overtemperature rise prevention switch device 1 becomes much smaller than in the past.

Incidentally, the overtemperature rise prevention switch device 1 and the temperature fuse 2 may be attached to the mounting plate 4 and then the mounting plate 4 may be fixed to the wall 5 of the main body of the heater.

In this case, a short length of wiring between the temperature fuse 2 and the switch device 1 is sufficient.

Alternatively, the mounting plate 4 may be a flat plate, and a frame 10 may be provided on the heater body wall 5 as shown in FIG. 3, and the frame 10 may be attached to the mounting arm 10a. The heater main body wall 5 may be expanded outward by that amount.

As explained above, the present invention includes a temperature fuse interposed in the electric circuit for controlling the operation of the heater, and a temperature overrise prevention switch device that detects a predetermined air temperature inside the heater and turns it on to 0N-QFF. The temperature sensing section and the heat exchanger are mounted on the same mounting plate so that the mounting plate is interposed between them, and a part of the mounting plate between the temperature sensing section and the heat exchanger is attached to the heat exchanger side. Since the guide plate is cut up and raised to control the temperature sensed by the temperature sensing part by guiding the heated air flow inside the heater to the temperature sensing part, it is possible to reduce the length of the electric wires and the number of mounting plates. It is possible to reduce the amount and is economical, and the replacement work is easy because it is integrated.

In addition, by adjusting the angle at which the guide plate is cut and raised, variations in the operating temperature of the overtemperature rise prevention switch device can be reduced, and product quality can be made uniform.

By forming the guide plate on the mounting plate in this manner, it becomes easy to install a temperature fuse and an overtemperature rise prevention switch device on the same mounting plate.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the installed state of the safety device mounting device according to the present invention, FIG. 2 is a longitudinal sectional view of the same guide plate portion, and FIG. 3 is a perspective view of another embodiment. 1...Temperature rise prevention switch device, 2...
...Temperature fuse, 3...Fuse holder, 4
...Mounting plate, 8...Guidance plate.

Claims (2)

[Scope of utility model registration request] (1) The temperature fuse installed in the electric circuit for controlling the operation of the heater and the temperature sensor detects the predetermined air temperature inside the heater and the temperature reaches 0N.
- A temperature overrise prevention switch device that turns off is attached to the same mounting plate such that the mounting plate is interposed between the temperature sensing section and the heat exchanger, and the temperature sensing section and the heat exchanger are connected to each other. A part of the mounting plate is cut and raised toward the heat exchanger side to form a guide plate that controls the temperature sensed by the temperature sensing part by guiding the heated air flow inside the heater to the temperature sensing part. Safety device mounting device for heating equipment. (2) The guide plate is cut and raised diagonally with respect to the mounting plate, and has a shape that causes turbulence between the guide plate and the temperature sensor after the heated air flow is directed away from the temperature sensor. A safety device mounting device for a heating machine according to claim 1 of the utility model registration claim.