JP2853369B2 - Hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air heater.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, a conventional hot air heater detects a temperature in the vicinity thereof by a room temperature thermistor 2 attached to a rear portion of a hot air heater main body 1, and is attached to an operation unit. Combustion control is performed so that the detected temperature of the room temperature thermistor 2 coincides with the set temperature input from the temperature setting key 3 to keep the room temperature constant.

[0003]

In the above-mentioned conventional configuration, the room temperature at which the user of the warm air heater is considered comfortable is set by the temperature setting key 3.
Although it was designed to keep the room in a comfortable state by setting the temperature, the perceived temperature felt by the human body is not necessarily comfortable if the room temperature is constant, and even if the room temperature is constant, cooling from the wall The perceived temperature fluctuates due to the intensity of radiation, an increase in the amount of radiation due to sunlight entering the room, and the like. In order to solve this, a radiation sensor 4 is attached to the conventional hot air heater main body 1, the amount of radiation in the room is measured, and the combustion control is performed so that the perceived temperature is stabilized in a comfortable state based on the relationship with the room temperature. Machine development.

However, the radiation sensor 4 sometimes malfunctions and abnormally burns due to the influence of heat and heat radiation of the warm air from the outlet of the warm air heater main body. Another problem is that the sensor output changes due to deformation of the radiation sensor due to dents and adhesion of dust to the sensor.

The present invention has been made to solve the above-mentioned problems, and the radiation sensor does not cause a change in output due to the influence of heat of combustion or the effect of hot air, deformation due to dusting, or adhesion of dust to the sensor. The purpose of the present invention is to develop a hot air heater capable of measuring the temperature and controlling the combustion together with the room temperature.

[0006]

According to the present invention, in order to achieve the above object, a radiation sensor is provided at a position above a front plate of a hot air heater and farther from a hot air outlet, and the radiation sensor is provided .
Has a polyethylene sheet on the front to prevent dust from entering.
Of the radiation sensor and the surrounding front plate.
A foam urethane heat insulating material is provided in the gap, and the radiation
A pantin with an aperture ratio of 50% or more on the front plate facing the sensor
Attach the cover consisting of
The combustion control is performed according to the output of.

[0007]

According to the present invention, the radiation sensor is hardly affected by heat from the rear and surroundings, and measures the radiation amount in the front part of the radiation sensor without directly receiving the warm air flowing from the blowout part. Can be. In addition, a change in the sensor output due to beating and dust is prevented, and furthermore, an output fluctuation of the radiation sensor due to an air current is suppressed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in the figure, the radiation sensor 4 is provided with an inclined portion A provided at the upper right corner of the front plate 11 of the front plate 11 of the hot air heater 1.
In order to suppress heat transfer to the light collector, a heat insulating material 6 made of urethane foam is attached to a gap between the back portion of the light collector 5 and the front plate 11. A protective punching cover 8 is mounted on the surface of the radiation sensor 4 in order to prevent a change in performance or damage due to dust or dirt on the radiation sensor 4, and a polyethylene sheet 9 for preventing dust is provided between the punching cover 8 and the light receiving section 7 inside. ing. The radiation sensor 4 is attached so that the angle of attachment of the radiation sensor 4 is approximately 5 ° above horizontal along the inclination of the inclined portion A.

The functions of the above configuration will be described. In FIG. 2, the radiation sensor 4 is moved to the position of the inclined portion A at the upper right corner of the front plate far from the combustion portion, the position of the lower right portion B of the front plate, and the position of the inclined portion C at the upper left corner of the front plate above the combustion portion. Each was installed, and radiant energy was applied from the front of the warm air heater main body 1 by a radiant lamp during combustion to compare the amount of captured radiation.

As a result, since the position of C is above the hot air outlet 1a, the rising hot air is directly caught, and the output of the radiation sensor 4 fluctuates with the change of combustion from strong combustion to weak combustion. A malfunction has occurred. In addition, it was affected by changes in combustion from the rear because it was close to the combustion section provided in the left half.

The position B is less susceptible to the effects of warm air and combustion than the position C, but the lower half of the viewing angle of the radiation sensor looks at the floor and captures the radiation of the entire room. Is difficult. In order to capture the radiation amount of the whole room at the position B, it is necessary to incline upward by 10 ° or more.

As in the embodiment of the present invention, the position of A is the most preferable among the positions of A, B, and C in consideration of the mounting because it is hardly affected by warm air or combustion. In addition, since the viewing angle of the radiation sensor is about 120 °, it is preferable to tilt the sensor unit upward within a range of 5 ° or less in order to uniformly capture the amount of radiation in the entire room.

As shown in the vertical sectional view of the main part of the radiation sensor 4 and the hot air heater 1 in FIG. 1, the back and front plates of the light collector 5 are used to suppress the heat transfer of the radiation sensor 4 to the light collector 5. A heat insulating material 6 made of urethane foam is attached to the gap. As a result, the light receiving section 7 of the radiation sensor can collect and capture radiation from the front with the light collector 5 without being affected by heat from the back of the sensor.

Further, when the radiation sensor 4 is attached to the warm air heater 1, it is necessary to provide a protective cover 8 at the front to prevent a change in performance due to damage of the radiation sensor 4 due to dust or dust. One used.

Aperture ratio 50% Punched metal Aperture ratio 70% Punched metal Thickness 3 mm Glass plate Thickness 2 mm Acrylic plate Polyethylene sheet Using the above material for the protective cover, 100% without cover
(Table 1) shows a comparison of the radiation amount and the comparison of the dust resistance, the protective effect, the airflow effect, and the heat dissipation when the above conditions are satisfied.は indicates good, ◎ indicates excellent, △ indicates slightly good, and × indicates unacceptable.

[0016]

[Table 1]

Judging from the results shown in Table 1, it is preferable to use the punching cover 8, and since the performance is improved in proportion to the aperture ratio, the punching cover 8 preferably has a high aperture ratio. Further, in order to improve the performance against dust, it is also possible to use a polyethylene sheet 9 in combination.

[0018]

As described above, the warm air heater according to the present invention is designed to radiate indoor air in order to prevent malfunctions and abnormalities due to the effects of warm air and combustion, the effects of external impacts such as dents, and the effects of dust. Since the combustion amount can be measured and the combustion control can be performed in consideration of the room temperature and the indoor radiation amount, a hot air heater having an optimum sensible temperature can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a hot air heater equipped with a radiation sensor according to one embodiment of the present invention.

FIG. 2 is a perspective view of a hot air heater equipped with a radiation sensor.

FIG. 3 is a perspective view of a conventional hot air heater.

FIG. 4 is a perspective view of the back side of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot-air heater main body 2 Room temperature thermistor 3 Temperature setting key 4 Radiation sensor 5 Light collector 6 Insulation material 7 Light-receiving part 8 Punching cover 9 Polyethylene sheet 10 Operation base 11 Front plate

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Mitsuharu Tomioka 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-62-194161 (JP, A) JP-A-63- 187128 (JP, A) JP-A-62-182550 (JP, A) JP-A-3-63444 (JP, A) JP-A-61-145246 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24H 3/04 305 F24H 3/04 301 F24H 3/02 301

Claims (1)

(57) [Claims] 1. A warm-air heating machines odor with room temperature detector
A radiation sensor is provided at a position on the side of the front plate of the warm air heater farther from the hot air outlet , and the radiation sensor
Has a polyethylene sheet on the front to prevent dust from entering.
Of the radiation sensor and the surrounding front plate.
A foam urethane heat insulating material is provided in the gap, and the radiation
A pantin with an aperture ratio of 50% or more on the front plate facing the sensor
A hot air heater equipped with a cover made of a heat sheet and performing combustion control according to the output of the radiation sensor.