JP2929851B2 - 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 heater for heating in consideration of indoor radiation.

[0002]

2. Description of the Related Art Conventionally, a heater of this type, for example, a fan heater will be described with reference to FIG.
Reference numeral 6 denotes a front plate mounted on the front of the main body case 25;
Denotes a hot air outlet formed in the front plate 26. Reference numeral 28 denotes a heat source provided in the heater main body 1, and 29 denotes a combustion tube which covers the heat source 28, and a catalyst 30 having a large number of ventilation holes is provided at the top. Reference numeral 31 denotes a duct provided in the main body so as to surround the combustion tube 29, and a bell mouth 32 is provided at a rear portion. A convection blower 33 supplies air for warm air into the duct 31.
It is attached through. The fan guard 34 has a number of air intake holes 35 formed therein, and the convection blower 33 sucks air from the air intake holes 35. A radiation sensor 36 detects the amount of radiation in the room, and is supported by a sensor mounting portion 37. Reference numeral 38 denotes a perforated plate having a large number of holes provided for protecting the radiation sensor 36, and is attached to the front plate 26 together with the sensor cover 39. Reference numeral 40 denotes a correction thermistor for correcting the output of the radiation sensor 36, which is attached near the radiation sensor 36. A control unit 41 controls the heat source 28 and the convection blower 33 based on the outputs of the radiation sensor 36 and the correction thermistor 40.

In the above heater, the radiation sensor 36 detects the amount of radiation from an indoor wall or the like, and the control unit 41 controls the heat source 28 and the convection blower 33 based on the output of the heater. There is an advantage that comfortable heating can be performed in consideration of cooling radiation from a wall or the like.

[0004]

However, in the above-described conventional configuration, the influence of the radiant heat from the heat source 28 and the like is not detected.
Therefore, there is a problem that the radiation sensor 36 alone cannot detect an accurate radiation amount. Therefore, a correction thermistor 40 must be provided near the radiation sensor 36 to compensate for the effect of the heat from the heat source 28 to correct the output of the radiation sensor 36.

[0005] Further, as the heating time becomes longer, dust in the room adheres to the fan guard 34 and blocks the air intake hole 35. As a result, the amount of inflow of air from the air intake hole 35 is reduced, and in the above configuration, air is taken in, for example, from the gap between the main body case 25 and the front plate 26. As a result, air is also sucked in from a small gap generated between the radiation sensor 36 and the front plate 26, and the air lowers the temperature of the radiation sensor 36,
There has been a problem that the radiation amount cannot be detected accurately even by this.

[0006] Further, it is strongly desired that the installation space of this type of heater be reduced in size.
8, the main case 25 has a vertically long shape, and the upper portion has a larger ratio of a space in which nothing is installed than the lower portion where the strength is increased by attaching the heat source 28 and related components. There was also a problem that it was weak and easily deformed.

The present invention has been made to solve such a problem, and has as its object to enable accurate detection of radiant heat without a correction thermistor.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a main body case having a heat source therein, a blower provided on the back of the main body case, and a hot air outlet provided on the front side. Plate, heat from said heat source and said
A duct that mixes the wind from the blower and guides the hot air to the hot air outlet, and a radiation sensor provided at an appropriate position above the front plate,
A control unit for controlling at least a heat source based on an output from the radiation sensor; and a tank partition plate attached to the main body case so as to form a cartridge tank storage chamber in the main body case. A heat shield is provided between the top plate and the heat shield and the top plate.
While positioning the radiation sensor in the space formed, a part of the heat shield plate is fixed to the tank partition plate,
The hot plate and the main body casing shielding the tank partition plate integrally connected to the front
The radiation sensor has a packing in front of
It is configured to be attached to

[0009]

According to the present invention, the radiant heat from the heat source and the hot air are blocked by the heat shield plate by the above structure, so that the radiation amount can be accurately detected without a correction thermistor, and the heat shield plate and the tank partition are provided. By connecting the plate and the main body case, the strength of the upper part of the main body case can also be improved.

If a packing is provided between the radiation sensor and the front plate, a gap between the radiation sensor and the front plate is eliminated, and dust adheres to a fan guard or the like of the blower and the amount of air suction decreases. Also, the air inside the room will not be sucked in from the gap between the radiation sensor and the front plate through the thermistor part of the radiation sensor, and the detection accuracy of the radiation sensor will be maintained accurately over time. I can do it.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Reference numeral 1 denotes a main body case of a heater, and 2 denotes a front plate mounted on the front surface of the main body case 1; Having. 4 is a heat source such as a burner provided in the main body case 1,
Reference numeral 5 denotes a combustion tube covering the heat source 4, and reference numeral 6 denotes a duct provided in the main body case 1 so as to cover the combustion tube 5. 7 is a convection blower, which is covered by a fan guard 8;
The indoor air sucked from outside the main body case 1 is supplied into the duct 6, mixed with the heat from the heat source 4 in the duct 6, and blown out from the hot air outlet 3. Reference numeral 9 denotes a bellmouth plate provided at the rear of the duct 6.

Reference numeral 10 denotes a radiation sensor provided at an appropriate position above the front plate 2, reference numeral 12 denotes a heat shield plate provided between the duct 6 and the top plate 1a of the main body case 1, and a front end thereof is the radiation sensor. It extends to below 10 and is located between the radiation sensor 10 and the duct 6. A control unit 14 is mounted above the heat shield plate 12 and controls the amount of heat generated by the heat source 4 and the amount of air blown by the blower 7 based on the output from the radiation sensor 10. Reference numeral 15 denotes a packing provided between the front plate 2 and the front surface of the radiation sensor 10 to prevent room air from being sucked into the main body case 1 via a thermistor portion of the radiation sensor 10 described later. is there. A sensor cover 16 fixes a perforated plate 17 having a large number of holes to the front plate 2.

Reference numeral 18 denotes a case of the radiation sensor 10, and a concave reflecting plate 20 is fixed together with a case frame 19. A sensor mounting plate 21 has a thermistor 22 serving as a sensor mounted at the center thereof. Reference numeral 23 denotes a sensor support, one end of which is screwed to the heat shield plate 12, and the other end of which is screwed to a tank partition plate 24 described later. This tank partition plate 24 is formed in a substantially L-shape, and both ends thereof are fixed to the main body case 1 using screws or the like.
A cartridge tank storage chamber 24a is formed therein.
Further, the heat shield plate 12 is formed by using a screw for fixing the sensor support portion 23 after passing a locking piece 12a formed by bending part of the heat shield plate 12 through a slit hole (not shown) provided in the tank partition plate 24. To the tank partition plate 24.

In the above configuration, the radiant heat from the indoor wall or the like passes through the perforated plate 17 on the front surface of the radiation sensor 10 and hits the concave reflector 21. The heat is reflected by the concave reflector 21 and the thermistor 22 at the center of the sensor mounting plate 21. And the temperature of the thermistor 22 is changed. The radiation sensor 10 detects the radiation amount based on the temperature change of the thermistor 22, and the control unit 14 controls the heat source 4 and the blower 7 based on the output.

Here, the radiant heat from the duct 6 and the hot air, which had a bad influence on the radiant sensor 10, are cut off by the heat shield plate 12 extending below the radiant sensor 10, and the radiant heat from the duct 6 It detects only radiant heat from a wall or the like entering from the perforated plate 17 irrespective of heat or hot air. Therefore, a conventionally required correction thermistor is unnecessary, and accurate radiation amount detection becomes possible without this correction thermistor.

On the other hand, when the heater has been used for a long time, dust in the room adheres to the fan guard 8, and the air intake hole 8a
Even if the amount of air flowing in from the air starts to decrease and the room air is sucked in from between the main body case 1 and the front plate 2 or the like, there is a packing between the front surface of the radiation sensor 10 and the front plate 2. Since the air conditioner 15 is provided, the room air does not enter the main body case 1 from the perforated plate 17 through the thermistor 22 and between the front plate 2 and the front surface of the radiation sensor 10. Therefore, the radiation sensor 10 can accurately detect the radiation amount even if the radiation sensor 10 has been used for a long time without being affected by such an air flow.

Since the front end of the heat shield plate 12 for blocking radiant heat from the duct 6 is fixed to the tank partition plate 24, the main body case 1 and the tank partition plate 24 are fixed through the heat shield plate 12. And will be connected together. Therefore, the strength of the upper part of the main body case 1 where the space ratio is large and which is easily deformed can be greatly improved.

[0018]

As apparent from the above description of the embodiment, according to the present invention, it is possible to accurately detect radiant heat even without a correction thermistor, and to improve the strength of the upper part of the main body case by using a heat shield plate. And a highly reliable heater can be provided.

In the case where the packing is provided between the radiation sensor and the front plate, the detection accuracy of the radiation heat does not change over time, and the reliability can be further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a heater according to an embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the heater.

FIG. 3 is an enlarged sectional view showing a main part of FIG. 2;

FIG. 4 is a sectional view showing a conventional heater.

[Explanation of symbols]

 2 Front plate 3 Hot air outlet 4 Heat source 6 Duct 7 Blower 10 Radiation sensor 12 Heat shield 14 Control unit 15 Packing 24 Tank partition plate 24a Cartridge tank storage room

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F24H 3/04 305 F24H 3/02 301 F24H 9/00

Claims (1)

(57) [Claims] [1 claim: a body case having a heat source therein, a front plate having a blower and a warm air blowout port formed in a front surface provided on a back surface of the main body case, and the heat from the heat source the
A duct that mixes the wind from the blower and guides the hot air to the hot air outlet, and a radiation sensor provided at an appropriate position above the front plate,
A control unit for controlling at least a heat source based on an output from the radiation sensor; and a tank partition plate attached to the main body case so as to form a cartridge tank storage chamber in the main body case. A heat shield is provided between the top plate and the heat shield and the top plate.
While positioning the radiation sensor in the space formed, a part of the heat shield plate is fixed to the tank partition plate,
The hot plate and the main body casing shielding the tank partition plate integrally connected to the front
The radiation sensor has a packing in front of
A heater designed to be attached to