JPS6120456Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a hot air heater having a temperature sensor.

Conventionally, temperature detectors such as autocuts have been used by being directly attached to a heat exchanger, or by being installed near a heat exchanger so as to receive radiant heat from the heat exchanger. however,
In the former case, high heat resistance was required, and in the latter case, there were drawbacks such as unstable operating characteristics.

This invention was developed in view of the above-mentioned drawbacks, and the purpose is to provide a highly reliable hot-air heater that can employ a temperature detector with relatively low heat resistance and has stable operating characteristics.

An example of this invention is shown below in Figures 1 and 2.
Referring to the drawings, reference numeral 1 denotes a casing, in which a suction port 2 is provided at the upper part of the back surface, and an outlet port 3 is provided at the lower part of the front surface. 4 is a partition wall provided in the casing 1, 5 is this partition wall 4,
This is a blower with blades 6 provided between the blades 6 and 4, and is formed from a blade casing 7 and an electric motor 8. 9 is a combustor attached to the partition wall 4; 10 is a heat exchanger connected to the combustor and provided between the partition walls 4; 11 is the suction port 2 on the upper surface of the heat exchanger. This mounting member is provided in a U-shape with a predetermined plate width near the plate and is secured with screws 12, and is provided so that the direction of the plate width is the same as the direction in which the air is blown by the blower 5. Reference numeral 13 denotes a temperature sensor such as an auto cut installed on the mounting member at a predetermined distance from the heat exchanger 10, 14 a humidifying plate provided at the lower end of the partition walls 4, 4, and 15 the humidifying plate. A fuel tank 16 is provided at the bottom of the casing 1, and an electromagnetic pump 16 is provided in the fuel tank to supply fuel to the combustor 9. 17 is an oil level gauge provided in the combustion tank, 18 is a fuel filler port of the fuel tank, 19 is a combustion blower that supplies fuel air to the combustor 9, 20 is an operating section, 21 is a control circuit section, and 22 is the above-mentioned suction This is a filter provided outside the mouth 2.

The hot air heater configured as above operates the combustion blower 19 and the electromagnetic pump 16.
The compressor is operated to supply combustor air and fuel to the combustor 9 for combustion and to heat the heat exchanger 10. The blower 5 is operated to supply indoor air through the filter 22 to the heated heat exchanger 10 for heat exchange, and the air is blown along the water surface of the humidifying tray 14, humidified, and blown out from the outlet 3 for heating. At this time, since the plate width direction of the mounting member 11 is set to be the same as the blowing direction of the blower 5, there is no resistance to the blowing, and the air is blown out from the outlet 3 with a uniform distribution, providing a comfortable heating effect. Furthermore, the temperature detector 13 is normally heated by thermal conduction from the mounting member 11 during heating, but is cooled by the indoor air sucked in by the blower 5, so that it is kept at a low temperature. On the other hand, if there is some abnormality, for example, if the air volume decreases due to clogging of the filter 22 and the heat exchanger 10 etc. becomes abnormally overheated, the heat conduction from the heat exchanger 10 increases and the cooling effect of the indoor air drawn in also decreases, causing the temperature detector 13 to become too hot and activate, stopping combustion via the control circuit section 21.

In the above embodiment, the mounting member 11 is formed in a U-shape, but as shown in FIG. A similar effect can be expected even if it is attached to the container 10.

As explained above, this invention has a temperature detector mounted on the heat exchanger at a predetermined distance via a mounting member with good thermal conductivity, so that the cooling effect of air blowing is high, and the temperature can be detected during normal combustion. The container is kept at a low temperature and requires low heat resistance. In addition, since the temperature sensor is sensitive to the temperature of the heat exchanger through thermal conduction, there are fewer disturbances, and in the event of an abnormality, the cooling effect of air blowing, etc. is reduced, so the temperature sensor operates reliably, resulting in highly reliable hot air heating. There is an effect that can be obtained by machine.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing one embodiment of this invention, FIG. 2 is a side sectional view of FIG. 1, and FIG. 3 is a detailed view of main parts showing another embodiment of this invention. In each figure, the same reference numerals indicate the same or corresponding parts, 1 is a casing, 5 is a blower, 10 is a heat exchanger, 11 is a mounting member, and 13 is a temperature sensor.

Claims (1)

[Scope of utility model registration request] a heat exchanger provided in the casing; a blower that sucks air outside the casing into the casing, brings it into contact with the heat exchanger, and blows it out of the casing;
and a temperature sensor for temperature control that detects the temperature of the heat exchanger, wherein the temperature sensor is attached to the surface of the heat exchanger corresponding to the upstream part of the air blown by the blower so as to be able to conduct heat. 1. A hot air heater, characterized in that the temperature sensor is attached to a mounting member having good thermal conductivity, and the temperature sensor is separated from the heat exchanger by a predetermined distance by the mounting member.