TWI601921B - Heating device - Google Patents

Description

Heating device

The present invention relates to a heating device that blows air heated by a heating element.

In a heating device that blows air heated by a heating element, a temperature fuse that is a temperature overheat preventing device of the heating element may be provided. In Patent Document 1, a temperature fuse is held by a protective net (net), whereby the temperature fuse is fixed at a position spaced apart from the heat generating body.

Advanced technical literature Patent literature

Patent Document 1: Japanese Patent Publication No. 58-48999

However, according to the above-described past technique, since the temperature fuse and the heating element are separated, an error is likely to occur between the actual temperature of the heating element and the temperature detected by the temperature fuse. Therefore, even if the heating element has risen to an abnormal temperature, there is a case where the abnormal temperature which cannot be detected by the thermal fuse occurs.

The present invention has been made in view of the above, and an object thereof is to obtain a heating device capable of reducing the difference between the actual temperature of the heat generating body and the temperature detected by the temperature fuse.

In order to solve the above problems and achieve the object, the present invention includes a casing having an air suction port and an air blowing port formed on an outer surface thereof, and an air passage connecting the air suction port and the air blowing port is formed inside the air blower; In the road, air is caused to flow from the air intake port toward the air blowing port, a heat generating body provided in the air passage, and a fuse portion that is in contact with the heat generating body.

According to the heating apparatus of the present invention, it is possible to reduce the difference between the actual temperature of the heat generating body and the temperature detected by the temperature fuse.

1‧‧‧shell

2‧‧‧heating frame

4‧‧‧Fuse fixing part

4a‧‧‧Elastic force application department

4b‧‧‧ gripping department

5‧‧‧Fuse section

6‧‧‧Wire fixing department

8‧‧‧ wire

23‧‧‧Temperature fuse

24‧‧‧Crimper

25‧‧‧Protection tube

27‧‧‧ Fixed Department

28‧‧‧Path Decision Department

30‧‧‧Air blower

31‧‧‧ heating department

31a‧‧‧heating body

31b‧‧‧Fins

32‧‧‧Air intake

33‧‧‧Air blowout

34‧‧‧ Wind Road

50‧‧‧ heating

Fig. 1 is a perspective view showing a schematic configuration of a heating apparatus according to Embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view showing a schematic configuration of a heating device.

Fig. 3 is a front elevational view showing a schematic configuration of a heating unit.

Fig. 4 is a cross-sectional view taken along the Y-Y line shown in Fig. 3.

Fig. 5 is a perspective view showing a heating portion fixing frame in a state in which a heating portion is held.

Fig. 6 is a perspective view showing a state in which the heating portion and the heating portion fixing frame are disassembled.

Fig. 7 is a cross-sectional view showing the fixing portion of the heating portion in a state in which the heating portion is held.

Fig. 8 is a partially enlarged cross-sectional view showing a portion A shown in Fig. 7.

Fig. 9 is a view showing a schematic configuration of a fuse unit.

Fig. 10 is a perspective view of the fuse fixing portion.

Fig. 11 is a perspective view of the heating portion fixing frame in a state in which the fuse portion is fixed.

Fig. 12 is a perspective view of a lead line fixing portion.

Fig. 13 is a perspective view showing the fuse portion in a state in which the wire is fixed to the wire fixing portion.

Hereinafter, the heating device according to the embodiment of the present invention will be described in detail with reference to the drawings. Further, the present invention is not limited to the embodiment.

Embodiment 1

Fig. 1 is a perspective view showing a schematic configuration of a heating device 50 according to Embodiment 1 of the present invention. Fig. 2 is a cross-sectional view showing a schematic configuration of a heating device 50. The heating device 50 includes a casing 1, a blower 30, a heating unit 31, and a fuse unit 5. The outer side surface of the casing 1 is formed with an opening as an air suction port 32 and an air blowing port 33.

An air passage 34 that connects the air suction port 32 and the air blowing port 33 is formed inside the blower casing 1. The blower 30 is disposed in the air passage 34. As indicated by an arrow X in FIG. 2, the blower 30 allows air to pass through the air passage 34 from the air intake port 32 toward the air blow port 33.

The heating unit 31 is disposed in the air passage 34. Fig. 3 is a front view showing a schematic configuration of the heating unit 31. Fig. 4 is a cross-sectional view taken along the Y-Y line shown in Fig. 3. The heating unit 31 has a plurality of heating elements 31a and a plurality of fins 31b.

The heating element 31a has a rod shape. The plurality of heating elements 31a are arranged to be parallel to each other with an interval therebetween. In the following description, the longitudinal direction of the heating portion 31a It is the first direction. The heating element 31a is an electric heater that generates heat by power supply. From the viewpoint of suppressing excessive heat generation, the heating element 31a is preferably a PTC (Positive Temperature Coefficient) heater. The PTC heater has a self-temperature control function by utilizing a PTC element whose impedance value rises sharply when it reaches the Curie temperature.

The plurality of fins 31b protrude from the heat generating body 31a. The fin 31b assumes a plate shape. The plurality of fins 31b are formed to be spaced apart from each other with their plate faces facing each other. The heat generated by the heating element 31a is transferred to the fins 31b. The materials of the heating element 31a and the fin 31b are determined based on thermal conductivity. Examples of the material of the heating element 31a and the fin 31b are aluminum-containing metals.

The heating unit 31 is held by a heating unit fixing frame to be described later. The heating portion fixing member 18 is formed to fix the notch 19 with a screw. The heating portion fixing frame is fixed in the air passage 34, whereby the heating portion 31 is fixed in the air passage 34. The air passing through the air passage 34 is heated by passing between the fins 31b. In other words, the heating device 50 heats the air taken into the air passage 34 from the air suction port 32 by the heating unit 31, and blows it out from the air blowing port 33. The heating device 50 is, for example, a heater. In addition, the heating device 50 may also be a dryer. In addition, the heating device 50 can also be a bathroom heating dryer.

Fig. 5 is a perspective view showing the heating unit fixing frame 2 in a state in which the heating unit 31 is held. Fig. 6 is a perspective view showing a state in which the heating unit 31 and the heating unit fixing frame 2 are disassembled. Fig. 7 is a cross-sectional view showing the heating unit fixing frame 2 in a state in which the heating unit 31 is held. Fig. 8 is a partially enlarged cross-sectional view showing a portion A shown in Fig. 7. The heating portion fixture 18 projecting from both sides of the heating portion 31 is fixed by a screw to be held by the heating portion fixing frame 2. Fixing part in the heating part A notch 19 for fixing with a screw 10a is formed on 18. The heating unit 31 is fixed in the air passage 34 in a state of being held by the heating unit fixing frame 2 . The heating portion fixing frame 2 is fixed in the air passage 34 and constitutes a part of the casing 1. A screw boss 12 for locking the screw 10a is formed in the heating portion fixing frame 2.

As shown in FIGS. 6 and 7, the fuse portion 5 is fixed by a fuse. 4 is fixed and brought into contact with the heating element 31a. Fig. 9 is a view showing a schematic configuration of the fuse unit 5. The fuse unit 5 has a temperature fuse 23, a wire 8, and a tube 25. The two wires 8 are connected to the temperature fuse 23. The temperature fuse 23 and the two wires 8 are connected in series. The wire 8 and the temperature fuse 23 are connected by a crimping member 24. The protective tube 25 covers the temperature fuse 23, the crimping member 24, and a portion of the wire 8, which as a whole has a rod shape. The protective tube 25 separates the wire 8 from the heat of the heat generating body 31a. In addition, the temperature fuse 23 and the crimping member 24 are electrically insulated from the surrounding components.

The temperature fuse 23 detects the temperature of the heating element 31a. Heating element 31a When the temperature is higher than the temperature set to the abnormal temperature, the low melting point alloy disposed inside the temperature fuse 23 is melted to block the wires 8 from each other. By providing the fuse portion 5 as a part of the electric power line that supplies electric power to the heat generating body 31a, the supply of electric power to the heat generating body 31a can be stopped by the melting of the low melting point alloy. As a result, when the heating element 31a becomes an abnormal temperature, the fuse unit 5 stops the supply of electric power to the heating element 31a to prevent the heating element 31a from becoming overheated.

As shown in Fig. 6, the fuse fixing portion 4 has a rod shape as a whole. The length is the same as the portion of the protective tube 25 of the fuse portion 5. As shown in Fig. 8, the fuse fixing portion 4 includes an elastic force applying portion 4a that is provided on the opposite side of the heat generating body 31a with the fuse portion 5 interposed therebetween, and a heating force applying portion 4a toward the heat generating body 31a. The nip portion 4b that extends to sandwich the protective tube 25 of the fuse portion 5. Further, the nip portion 4b is formed such that the amount of protrusion is smaller than the diameter of the protective tube 25.

Fixing one end side of the fuse fixing portion 4 in the longitudinal direction with a screw 9 The heating unit fixing frame 2 is fixed. A screw hole 14 for locking the screw 9 is formed in the heating portion fixing frame 2. The other end side of the fuse fixing portion 4 in the longitudinal direction is fixed by the fitting of the projection 15 and the hole 22. In the example shown in Fig. 6, the projections 15 are formed in the heating portion fixing frame 2, and the holes 22 are formed in the fuse fixing portion 4. The protrusion may be formed in the fuse fixing portion 4, and the hole may be formed in the heating portion fixing frame 2.

In a state where the fuse portion 5 is not provided, the heating portion 31 is solidified When the fixed portion 4 is fixed to the heating portion fixing frame 2, the distance between the heat generating body 31a and the elastic force applying portion 4a is smaller than the diameter of the protective tube 25 of the fuse portion 5. Therefore, when the fuse portion 5 is provided, the fuse fixing portion 4 is elastically deformed, and an elastic force that presses the protective tube 25 against the heat generating body 31a occurs.

Fig. 10 is a perspective view of the fuse fixing portion 4. Fixed in fuse One portion of the portion 4 forms a recess 20 that is recessed in a direction away from the heat generating body 31a. Fig. 11 is a perspective view of the heating unit fixing frame 2 in a state in which the fuse unit 5 is fixed. The fuse portion 5 is fixed in part by the fuse fixing portion 4 and the band 7 in the recess portion 20. A part of the fuse portion 5 is pressed toward the concave portion 20 by the strap 7. The fuse portion 5 is fixed to the fuse fixing portion 4 by the fixing of the belt 7. In addition, the position of the fuse portion 5 is determined such that the position of the crimping member 24 is located at the position of the recess 20. Further, in Fig. 11, in order to facilitate the display of the drawing, the fuse portion 5 in a temporarily fixed state before being bound by the belt 7 is shown.

As shown in Fig. 6, the screw 10b will be used to determine the fuse portion 5. a wire fixing portion 6 of a path and a position of a portion of the wire 8 extending from the protective tube 25 It is fixed to the heating portion fixing frame 2. A screw hole 13 for locking the screw 10b is formed in the heating portion fixing frame 2. Fig. 12 is a perspective view of the wire fixing portion 6. The wire fixing portion 6 has a fixing portion 27 fixed by a screw 10b, and a path determining portion 28 extending from the fixing portion 27 for determining a path of the wire 8. The path determining portion 28 passes the wires 8 between the recesses to determine the path of the wires 8.

Fig. 13 is a view showing a state in which the wire 8 is fixed to the wire fixing portion 6. A perspective view of the fuse portion 5. As shown in Fig. 13, when the fixing portion 27 is rotated in the rotation direction of the hour hand rotation when the fixing portion 27 is fixed by the screw 10b, the path determining portion 28 moves the wire 8 in a direction away from the temperature fuse 23, so that the wire fixing portion 6 is fixed to the heating portion fixing frame 2. When the wire fixing portion 6 presses the portion of the protective tube 25 and determines the path of the wire 8, it is also fixed in the same posture.

In the first embodiment, the fuse portion 5 is on the windward side and is heated. The portion 31a is in contact. Further, as shown in FIGS. 6, 7, and 8, the shape and size of the fuse portion 5 and the fuse fixing portion 4 are formed so that the heat generating body 31a is extended on the windward side. Further, the fuse fixing portion 4 is formed of the same material as the heating element 31a.

According to the heating device 50 described above, since the fuse portion 5 is directly Since the heat generating body 31a is in contact with each other, the temperature of the heat generating body 31a is easily transmitted to the fuse portion 5 by heat conduction. Thereby, the difference between the temperature of the heat generating body 31a and the temperature detected by the fuse unit 5 can be suppressed. Further, it is possible to prevent the power supply to the heat generating body 31a from being stopped too slowly when the temperature of the heat generating body 31a is abnormal.

In addition, the elastic force generated by the fuse fixing portion 4 will be blown The device portion 5 is pressed against the heat generating body 31a, and the fuse portion 5 and the heat generating body 31a can be surely brought into contact with each other. Further, in a state where the fuse portion 5 is not provided, the heating portion 31 and the melting portion In the case where the breaker fixing portion 4 is fixed to the heating portion fixing frame 2, since the distance between the heat generating body 31a and the elastic force applying portion 4a is smaller than the diameter of the protective tube 25 of the fuse portion 5, even when the fuse portion 5 is heated When the dimensions of the portion 31 and the fuse fixing portion 4 do not match, it is not easy to cause a gap between the fuse portion 5 and the heat generating portion 31.

Further, the amount of protrusion of the nip portion 4b of the fuse fixing portion 4 is formed as Since the diameter of the protective tube 25 of the fuse portion 5 is smaller, the fuse fixing portion 4 does not easily come into contact with the heat generating body 31a. Therefore, it is possible to suppress an increase in the temperature of the fuse fixing portion 4 and a decrease in the elastic force due to the temperature of the heat generating body 31a. Further, since the fuse fixing portion 4 sandwiches the fuse portion 5 with the nip portion 4b to fix it, the fuse portion 5 does not easily fall off from the fuse fixing portion 4.

In addition, the fuse portion 5 and the fuse fixing portion 4 are fixed by the belt 7. The fuse portion 4 forms a recess 20 that is recessed in a direction away from the heat generating body 31a. Therefore, the fuse portion 5 can be pressed toward the concave portion 20 side by the binding tape 7. Thereby, the belt 7 does not easily protrude toward the heat generating body 31a side. By making the belt 7 less likely to protrude toward the heat generating body 31a side, the fuse portion 5 and the heat generating body 31a can be brought into more sure contact.

In addition, the position of the fuse portion 5 is determined such that the crimping member 24 The position is at the position of the recess 20. When the size of the crimping member 24 is larger than that of the thermal fuse 23, the diameter of the protective tube 25 covering the portion of the crimping member 24 may be larger than the diameter of the protective tube 25 covering the portion of the thermal fuse 23. . Even in this case, the protective tube 25 and the crimping member 24 are pressed toward the concave portion 20 side by the binding band 7, whereby the portion covering the crimping member 24 is less likely to protrude toward the heat generating body 31a side. Thereby, the heat generating body 31a and the fuse portion 5 can be surely brought into contact with the portion covering the temperature fuse 23.

Further, the fuse fixing portion 4 is used at one end side in the longitudinal direction. The screw 9 is fixed to the heating portion fixing frame 2, and the other end side is fixed by the projection 15 and the hole 22, and the work of fixing the screw 9 is eliminated at one end side, and assembly work can be facilitated.

In addition, the shape and size of the fuse portion 5 and the fuse fixing portion 4 Since the income generating body 31a is extended in the upper wind side, the flow of the air passing through the air path 34 is not easily hindered. Further, since the fuse portion 5 is provided on the windward side with respect to the heat generating body 31a, excessive temperature rise can be suppressed by the air passing through the air passage 34, and the temperature fuse 23 can be prevented from being erroneously melted.

In addition, the wire fixing portion 6 is rotated at the time of fixing with the screw 10b. At the time of the turning, the path determining unit 28 moves the wire 8 in a direction away from the temperature fuse 23, so that the wire 8 does not easily loosen. Thereby, it is possible to suppress the falling or shifting of the thermal fuse 23.

In addition, since the heating element 31a and the fuse fixing portion 4 are the same The material composition makes it possible to avoid the occurrence of electric corrosion when condensation occurs.

Furthermore, the temperature fuse 23 is not limited to being allowed to rise due to temperature rise. A low-melting alloy molten fusible alloy type may also be a granular type device having springs and temperature-sensitive pellets therein, and the temperature rises when the temperature-sensitive particles are melted by the spring. Push the wires 8 and contacts away to block the current.

Further, the fuse portion 5 may be provided in the downwind of the heating element 31a. side. When the fuse portion 5 is provided on the leeward side of the heat generating body 31a, the shape and size of the fuse portion 5 and the fuse fixing portion 4 are also formed so that the heat generating body 31a is at a downwind. Within the range in which the side is extended, the flow of air passing through the air passage 34 can be prevented from being easily hindered.

1‧‧‧shell

5‧‧‧Fuse section

31‧‧‧ heating department

31a‧‧‧heating body

31b‧‧‧Fins

32‧‧‧Air intake

33‧‧‧Air blowout

34‧‧‧ Wind Road

Claims (9)

A heating device includes: a casing having an air suction port and an air blowing port formed on an outer side thereof, and an air passage connecting the air suction port and the air blowing port is formed inside the air blower; and a blower is disposed in the air path to make air a heat generating body provided in the air passage; a fuse portion that is in contact with the heat generating body; and a fuse fixing portion that contacts and fixes the fuse portion to the heat generating body; The fuse portion and the fuse fixing portion are fixed to the windward side of the heat generating body, and are housed in a range in which the heat generating body extends on the windward side. The heating device according to claim 1, wherein the fuse fixing portion fixes the fuse portion by an elastic force that is pressed toward the heat generating body. A heating device includes: a casing having an air suction port and an air blowing port formed on an outer side thereof, and an air passage connecting the air suction port and the air blowing port is formed inside the air blower; and a blower is disposed in the air path to make air a heat generating body provided in the air passage; a fuse portion that is in contact with the heat generating body; and a fuse fixed to contact the heat generating body and fixed to the air blowing port; The fuse fixing portion fixes the fuse portion by an elastic force that is pressed toward the heat generating body, and the fuse fixing portion includes an elastic force applying portion that is disposed to sandwich the fuse portion On the opposite side of the heat generating body, the elastic force is applied to the fuse portion, and the nip portion extends from the elastic force applying portion toward the heat generating body to sandwich the fuse portion. The heating device according to claim 3, wherein a gap is provided between the sandwiching portion and the heat generating body. A heating device includes: a casing having an air suction port and an air blowing port formed on an outer side thereof, and an air passage connecting the air suction port and the air blowing port is formed inside the air blower; and a blower is disposed in the air path to make air a heat generating body provided in the air passage; a fuse portion that is in contact with the heat generating body; and a fuse fixing portion that contacts and fixes the fuse portion to the heat generating body; The fuse fixing portion fixes the fuse portion by an elastic force that is pressed toward the heat generating body, and the fuse fixing portion is made of a material similar to the heat generating body. A heating device includes: a casing having an air suction port and an air blowing port formed on an outer side thereof, and an air passage connecting the air suction port and the air blowing port is formed inside the air blower; and a blower is disposed in the air path to make air Oriented from the above air intake The air blowing outlet flows; a heat generating body provided in the air passage; a fuse portion that is in contact with the heat generating body; and a fuse fixing portion that connects and fixes the fuse portion to the heat generating body, wherein the fuse is fixed The fuse portion is fixed by an elastic force pressed toward the heat generating body, and the fuse fixing portion has a rod shape, and one end side thereof is screwed to the casing, and the other end side is protruded by a protrusion. The hole is fitted and fixed to the housing. A heating device includes: a casing having an air suction port and an air blowing port formed on an outer side thereof, and an air passage connecting the air suction port and the air blowing port is formed inside the air blower; and a blower is disposed in the air path to make air a heat generating body provided in the air passage; a fuse portion that is in contact with the heat generating body; and a fuse fixing portion that contacts and fixes the fuse portion to the heat generating body; The fuse fixing portion fixes the fuse portion by an elastic force that is pressed toward the heat generating body, and the fuse portion is fixed to an upper wind side of the heat generating body. The heating device of claim 1, wherein: the fuse portion has a temperature fuse and a wire extending from the temperature fuse; and further includes: a wire fixing portion having: a screw fixed to the housing a fixing portion of the portion extending from the fixing portion and configured to determine a path of the wire a path determining unit that moves the wire to a direction away from the temperature fuse when the fixing portion is rotated in a rotation direction when the fixing portion is fixed by a screw, and fixes the wire fixing portion to the housing . The heating device according to claim 3, wherein the fuse fixing portion forms a recess that is recessed toward a direction away from the heat generating body, and the recess portion further includes the temperature fuse and the fuse fixing portion. Belts that are fixed together.