JPH0638283Y2 - Electric warm air blower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electric warmer for supplying air heated by a heater.

(B) Conventional technology Conventionally, as an electric warmer of this kind, a blower path from the intake port to the exhaust port is formed in the main body having an intake port and an exhaust port,
It is known that a ceramic heater is provided in the air passage and an air blowing unit that blows air heated by the heater to an exhaust port is provided. Further, in order to eliminate the risk of fire or the like due to the abnormal temperature rise of the heater due to the failure of the blower means or the like, a heat sensitive means such as a temperature fuse is provided.

However, because the heat-sensitive means is directly attached to the heater,
There is a possibility that the heat-sensitive means may detect an abnormal temperature.

(C) Problems to be Solved by the Invention The present invention has been made to solve the above-mentioned drawbacks, and it is an object of the invention to provide an electric warmer in which the heat-sensitive means does not malfunction and which operates reliably in an abnormal state. To do.

(D) Means for Solving the Problems The present invention has an air intake port and an air exhaust port, and an air flow path extending from the air intake port to the air exhaust port. The air flow path is provided between the air flow path and the inner wall surface of the air flow path. A heater disposed with a space, a blowing unit disposed in the blower passage, for blowing air that is sucked from an intake port and heated by the heater to an exhaust port, the heater, and an inner wall of the blower passage. And a heat-sensing means disposed at the interval between the heat-sensing means, and a part of the heat-sensing means is in contact with the heater to form a gap between the heater and the air blown by the air-blowing means. And a mounting member.

(E) Action When the air blowing means is driven, the air taken in from the air inlet is sent to the heater through the air passage, and the warm air heated by the heater is exhausted to the outside from the air outlet.

A part of the air sent to the heater by the blowing unit passes through the gap between the inner surface of the heater and the mounting member, cools the mounting member, and reduces the amount of heat transferred from the heater to the heat sensing unit. To prevent the detection of abnormalities.

When the air is blown out due to a failure of the air blowing means, air does not pass through the gap between the inner surface of the heater and the mounting member, so that the mounting member is not cooled and the amount of heat transferred from the heater to the heat-sensitive means increases. Then, the heat-sensing means reaches the abnormally sensed temperature, the power supply to the blower means and the heater is stopped, and the occurrence of a fire or the like is prevented.

(F) Embodiment One embodiment of the present invention will be described below in detail with reference to the drawings.

Reference numeral 1 denotes a main body, which has an intake port 2 formed on a rear surface and an exhaust port 3 formed on a lower portion of the front surface. 4 is a fan casing arranged in the main body 1, 5 is a motor fixed to the fan casing 4, and 6 is a blower fan fixed to a shaft 5a of a motor 5 projecting in the fan casing 4. The fan casing 4, the motor 5, and the blower fan 6 constitute a blower unit.

A guide 7 has one end connected to the exhaust port side of the fan casing 4 and the other end connected to the exhaust port 3, and is composed of a first guide part 7a and a second guide part 7b. A plurality of protrusions 8 are formed on the inner surface of the first guide 7a, and the ceramic heater 9 is fixed by the protrusions 8 so that a space 10 is formed between the inner surface of the first guide 7a and the outer peripheral surface of the heater 9. ing.

A thermal fuse 11 serves as a heat-sensitive means for detecting the temperature of the heater 9 and is covered with an insulating tube 12 and is in contact with the heater 9 through a mounting member 13 made of a metal plate having good thermal conductivity. . The mounting member 13 is a thermal fuse.
It is composed of a support portion 13a that supports 11 and an insertion portion 13b that is inserted into the space 10. The insertion portion 13b has a plurality of heat transfer portions between the mounting member 13 and the heater 9. Protrusion 14
Is formed toward the heater 9, and the flat portion of the insertion portion 13b is fixed to the inner surface of the first guide 7a, and the projection 14 is brought into contact with the outer surface of the heater 9 to be fixed. Then, the protrusion 14 which is a part of the mounting member 13 is brought into contact with the heater 9 to form a gap 15 between the heater 9 and the flat portion of the insertion portion 13b through which the air blown from the air blower passes. ing. In addition, the mounting member 13 includes a support portion 13a which is connected to the first guide 7a and the second guide 7a.
Holds in b.

Reference numeral 16 denotes a lath plate mounted between the exhaust port 3 of the guide 7 and the heater 9 so as to prevent dust and the like from entering the heater 9 through the exhaust port 3.

Reference numeral 17 denotes a louver provided at the exhaust port 3, and the user can change the direction of the warm air exhausted from the exhaust port 3 by rotating the louver from the outside of the main body 1 as needed.

Reference numeral 18 denotes a cord storage chamber formed in the lower part of the rear surface of the main body 1,
The main body 1 has an opening on the rear surface side, and the opening is closed by a lid 19 so that the power cord 20 can be put in and taken out from the opening. The power cord 20 is drawn into the main body 1 through a through hole 21 formed in the cord storage chamber 18 and connected to the motor 5 and the heater 9.

Reference numeral 22 denotes a tipping switch disposed on the bottom of the inside of the main body 1, and a rib 23 formed upward from the bottom surface of the main body 1 and a rib formed downward from the fan casing 4.
The operating portion 22a is fixed so as to project downward from the bottom surface of the main body 1. When the main body 1 is placed on the floor or the like, the overturn switch 22 is not capable of energizing the motor 5 and the heater 9. When the main body 1 falls over for some reason, the motor 5 and the heater 9 are turned on. It is designed to stop energization to. Further, the ribs 24 formed on the fan casing 4 press the power cord 20 toward the rear surface of the main body 1 and prevent the power cord 20 from being pushed in through the through hole 21.

Then, when a switch (not shown) is operated to energize the motor 5 and the heater 9, the blower fan 6 is rotated by the rotation of the motor 5, and the air taken in from the intake port 2 is sent to the heater 9 through the blower path, so that the heater 9 The warm air heated by is discharged from the exhaust port 3 to the outside.

Part of the air sent to the heater 9 by the blower fan 6 is
The mounting member 13 is cooled by passing through the gap 15 between the inner surface of the heater 9 and the flat portion of the insertion portion 13b of the mounting member 13, and the amount of heat transferred from the heater 9 to the thermal fuse 11 is reduced. To prevent fusing.

When the air blow is stopped due to a failure of the motor 5 or the like, air does not pass through the gap 15 between the inner surface of the heater 9 and the flat portion of the insertion portion 13b of the mounting member 13, so that the mounting member 13 is not cooled and the heater The amount of heat transferred from 9 to the thermal fuse 11 increases, the thermal fuse 11 reaches the fusing temperature and melts, and the power supply to the motor 5 and the heater 9 is stopped to prevent the occurrence of a fire or the like.

(G) Effect of the Invention As described above, according to the present invention, the heat-sensitive means does not malfunction, and the heat-sensitive means can be reliably operated when an abnormality occurs in the blower means.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention. FIG. 1 is a cross-sectional view, FIG. 2 is a cross-sectional view seen from another direction, FIG. 3 is an enlarged view of a main part, and FIG. 4 is a cross-sectional view of FIG. FIG. 5 is a sectional view taken along the line AA and FIG. 5 is a sectional view taken along the line BB in FIG. 1 ... Main body, 2 ... Intake port, 3 ... Exhaust port, 5 ... Motor, 6 ... Blower fan, 9 ... Ceramic heater, 10 ...
… Interval, 11 …… Thermal fuse, 13 …… Mounting member, 14 ……
Protrusion, 15 …… Gap.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 58-6135 (JP, U) Shoko 48-39554 (JP, Y1) Shoko 57-10367 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A main body having an intake port and an exhaust port, and having a blower duct extending from the intake port to the exhaust port, and a blower duct inner wall surface provided in the blower duct with a space therebetween. With a heater,
An air-blowing means which is arranged in the air-blowing path and which blows the air sucked from the intake port and heated by the heater to the exhaust port,
The heat-sensing means arranged in the space between the heater and the inner wall of the air-blowing path and the heat-sensing means are attached, and a part of the heat-sensing means is in contact with the heater and the air blown by the air-blowing means passes between the heater An electric hot air blower equipped with a metallic mounting member having a gap.