JPH05157357A - Hot air generator - Google Patents

Abstract

PURPOSE:To change over three types or more of hot air generator capabilities with one kind of a PTC heater and a simple fan with a single output. CONSTITUTION:There is disposed a heater part A comprised of upper and lower heaters 9, 10 on an air fan passage 12. An air speed is altered by a bent part 13 of the air fan passage 12, and hereby an inside air flow is slowed down as compared with an outside one. As a result, more air passes through the upper heater 9 than the lower heater 10. A changeover switch 4 changes over heating for only the upper heater 9, only the lower heater 10, or both heaters 9, 10. Since more air passes through the lower heater 10 than the upper heater 9 owing to the existance of the bent part 13 of the air passage 12, the lower heater 10 provides a greater output. Power supply only to the lower heater 10 ensures a higher heating capability than power supply only to the upper heater 9, and hence three stages of heating capability are selectable trough the operation of the changeover switch 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a heater (hereinafter referred to as a PTC heater) composed of a heating resistance element having a positive resistance temperature characteristic to generate warm air capable of switching the heating capacity in multiple stages. It relates to the device.

[0002]

2. Description of the Related Art A conventional warm air generator using a PTC heater has two PTC heaters, which are vertically stacked in an air duct.
A mode in which two PTC heaters are energized together, and one P
It is possible to switch the hot air generation capacity between two stages of a mode in which only the TC heater is energized.

[0003]

The conventional hot air generator is capable of switching the hot air generating capacity between strong and weak in two stages. However, the environment of use (room size, outside temperature, elapsed time of energization) It is possible to achieve a more comfortable environment by finely switching the hot air generation capacity depending on the number of users, the amount of dry matter, etc.).

For the above-mentioned purpose, P with different heater outputs is used.
It is conceivable to use a combination of TC heaters or to make the capacity of the blower switchable, but if these means are incorporated, it will cause a cost increase. The present invention has been provided in view of the above points, and the type of the PTC heater is one, and the blower is a simple output with a single output, and the hot air generation capacity can be switched to three or more types. The present invention provides a warm air generator for the purpose.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a blower, a heater portion including a heating resistance element having a positive resistance temperature characteristic upon receiving an air flow from the blower, and a heat radiation fin for radiating heat of the heating resistance element. This heater section is composed of two heaters capable of producing two independent outputs, the heater section is arranged on the downstream side of the curved section of the air passage, and one heater is arranged on the side with a large air flow rate. However, the other heater is arranged on the side where the amount of air blown is small, and switching means for switching the output of the heater section into three patterns is provided.

According to a second aspect of the present invention, there is provided a blower, and a heater portion including a heat generating resistor element having a positive resistance temperature characteristic upon receiving a flow of air by the blower and a heat radiating fin for radiating heat of the heat generating resistor element. 2 independent heaters
It is composed of two heaters capable of taking one output, and a deflector plate is provided on the upstream side of the heater section of the air flow passage to make a difference in the amount of air flow passing through the two heaters, and one heater is arranged on the side with the most air flow. The other heater is arranged on the side where the amount of air blown is small, and switching means for switching the output of the heater section into three patterns is provided.

Further, in the third aspect, the distance between the heat radiation fins of one heater of the heater section is different from the distance between the heat radiation fins of the other heater. According to a fourth aspect of the present invention, there is provided a blower, and a heater section including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower and a heat radiation fin for radiating heat of the heating resistance element. Is composed of two heaters that can take two independent outputs,
A bypass air passage that does not pass through the heater portion is formed, an opening / closing means for opening / closing the bypass air passage is provided, and a switching means for switching the output of the heater portion between two patterns is provided.

Further, according to a fifth aspect of the present invention, there is provided a blower, and a heater portion including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower and a heat radiation fin for radiating heat of the heating resistance element. 2 independent heaters
It is composed of two heaters capable of taking one output, and a deflector plate is provided on the upstream side of the heater section of the air flow passage to make a difference in the amount of air flow passing through the two heaters, and one heater is arranged on the side with the most air flow. A switch for switching the output of the heater to three patterns is provided by arranging the other heater on the side with less air flow, forming a bypass air passage that does not pass through the heater portion, and providing opening / closing means for opening and closing the bypass air passage. Means are provided.

[0009]

Thus, in the downstream of the curved portion, the wind velocity is faster on the outside than on the inside, increasing the amount of air blown per unit area,
The switching means can form three kinds of energization patterns to switch the hot air generating capacity in three stages. Further, according to the second aspect, it is possible to switch the hot air generating capacity in three stages by forming a difference in the amount of air blown through the two heaters by the deflector plate and forming three kinds of energization patterns by the switching means. ..

Further, in the present invention, the distance between the heat radiating fins of one heater of the heater section is made different from the distance between the heat radiating fins of the other heater, so that the amount of air passing through each heater section is made different. By forming three kinds of energization patterns by the switching means, it is possible to switch the hot air generating capacity in three stages. Further, according to the present invention, by opening and closing the bypass air passage by the opening / closing means, the amount of air blown through the heater portion is changed, and the output of the heater portion is switched to two patterns, and the temperature is increased to four stages. The wind generation capacity can be switched.

Further, in claim 5, the two heaters have different hot air generating capacities, the bypass air passage opening / closing means changes the hot air generating capacity of the heater portion, and the switching operation is performed by the switching means. It is possible to switch the hot air generation capacity in 6 stages.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The present invention applies the characteristic that the output of the PTC heater changes when the amount of air blown through the PTC heater changes. (Embodiment 1) FIG. 2 is a perspective view of a warm air heater 1, in which air flows in through a suction port 2 provided in the upper part of the front surface and is blown out through a warm air outlet 3 in the lower part. FIG. 1 shows a cross-sectional view of the warm air heater 1, in which air is sucked from the suction port 2 by the rotation of an impeller 6 fixed to a motor 5 provided at the back, and a PTC heater is formed through an air passage 12. It passes while being heated by the heater portion A composed of the upper heater 9 and the lower heater 10, and is discharged into the room through the warm air outlet 3.

Since the air passage 12 is bent near the inside of the heater portion A, the wind speed changes at the bent portion 13 of the air passage 12, and the flow velocity at the inside becomes slower than that at the outside. As a result, the lower heater 10 has a larger passing air volume than the upper heater 9. Further, switching between the upper heater 9 and the lower heater 10 is performed by the changeover switch 4 arranged on the upper surface of the warm air heater 1. The change-over switch 4 is a slide switch, but may be a rotary switch.

FIG. 3 is a perspective view of the heater portion A. The upper heater 9 is constructed by radiating fins 8 joined to both sides of the heating resistor element 7 and electrodes 11 joined to the outside thereof.
Similarly, the lower heater 10 is also configured such that the radiation fins 8 are joined to both sides of the heating resistance element 7 and the electrodes 11 are joined to the outside thereof. The upper heater 9 and the lower heater 10 are vertically stacked and arranged.

Energization to the upper heater 9 and the lower heater 10 can be switched to three patterns by the changeover switch 4. FIG. 4 is a circuit diagram when the upper heater 9 is turned on, and FIG. It is a circuit diagram when both the upper heater 9 and the lower heater 10 are turned on. Further, FIG. 6 shows the lower heater 10.
It is a circuit diagram when is turned on. Since the lower heater 10 has a larger passing air volume than the upper heater 9 due to the bent portion 13 of the air passage 12, the lower heater 10 has a larger output, and when only the lower heater 10 is energized, the upper heater 10 is energized. The heating capacity is higher than when only 9 is energized, and the heating capacity of three stages can be selected by switching the changeover switch 4.

(Embodiment 2) FIG. 7 is a perspective view of the hot air heater 1 of Embodiment 2, and FIG. 8 is a sectional view thereof. Motor 5
By the rotation of the impeller 6 fixed to the air, air is sucked from the suction port 2 formed on the upper surface, passes through the air passage 12 while being heated by the upper heater 9 and the lower heater 10, and the hot air outlet 3 Is exhaled into the room through.

As shown in FIG. 8, a deflector plate 14 is installed in an inclined manner in the air passage 12, and the deflector plate 14 allows the lower heater 10 to pass a larger amount of air than the upper heater 9. As a result, the lower heater 10 has the upper heater 9
When the lower heater 10 is energized, the heating capacity is higher than when only the upper heater 9 is energized, and the changeover switch 4 switches the heater energizing pattern in three types to achieve three-stage heating. Ability can be selected.

(Embodiment 3) Embodiment 3 is shown in FIG. Figure 1
Reference numeral 0 indicates a perspective view of the heater portion. The structure of the heater section A in FIG. 3 is basically the same as that of the lower heater 1 in FIG.
The pitch of 0'radiation fins 8'is larger than the pitch of the radiation fins 8 of the upper heater 9. In this example,
Compared with the second embodiment, the lower heater 1 does not have the deflector plate 14.
Only the pitch of 0'radiating fins 8'is different.

Lower heater 10 'compared to upper heater 9
Has a large pitch of the radiating fins 8 ', so that the air passage resistance becomes small. Therefore, the lower heater 1 is lower than the upper heater 9.
When it is 0 ', the amount of air blow is larger. As a result, the lower heater 1
The output of 0'becomes larger than that of the upper heater 9, and as in the case of the second embodiment, by switching the energizing pattern of the heater to three kinds by the changeover switch 4, it becomes possible to select three stages of heating capacity. ..

(Embodiment 4) Embodiment 4 is shown in FIGS. 11 and 12.
Indicates. In this embodiment, a bypass air passage 15 is provided above the upper heater 9, and a substantially doglegged opening / closing piece 16 for opening and closing the bypass air passage 15 is rotatably provided. In FIG. 11, the bypass air passage 15 is closed by the opening / closing piece 16, and in FIG. 12, the bypass air passage 15 is opened, so that an air flow without energizing the heater is generated. Therefore, as compared with the case where the bypass air passage 15 is closed, the amount of air blown through the heater portion A (upper heater 9, lower heater 10) is reduced, and the heater output is reduced.

(Fifth Embodiment) FIGS. 13 and 14 show a fifth embodiment.
Indicates. In this embodiment, the energizing pattern of the heater is switched by the changeover switch 4 of the fourth embodiment, and the opening / closing of the opening / closing piece 16 is combined. 13 shows a pattern in which only one heater (upper heater 9 in this embodiment) is energized, and FIG. 14 is a pattern in which both heaters (upper heater 9 and lower heater 10) are energized. The upper heater 9 and the lower heater 10 can be switched.

Therefore, by combining the opening and closing of the bypass air duct 15 by the opening and closing piece 16 and the change of the energization pattern of the heater by the changeover switch 4, four kinds of heating capacity can be selected. (Embodiment 6) Embodiment 6 is shown in FIGS. The air passage 12 has a bent portion 13 which is bent at a right angle in the vicinity of the heater portion A as in the previous embodiment. This bend 1
The wind velocity changes at 3, and the flow velocity at the inside becomes slower than that at the outside.
As a result, the lower heater 10 has a larger amount of passing air than the upper heater 9.

Therefore, the lower heater 10 has a larger output than the upper heater 9, and the heating capacity is higher when only the lower heater 10 is energized than when only the upper heater 9 is energized.
As in the case of the first embodiment, the three-stage heating capacity can be selected by the changeover switch 4. Further, a bypass air duct 15 connecting the upstream side and the downstream side of the heater portion A is provided,
It is possible to change the output of the heater unit A by changing the amount of air blown through the heater unit A by opening and closing the bypass air passage 15 by the opening and closing piece 16 for opening and closing it.

Therefore, six kinds of heating capacities can be selected by combining the three-step heating capacity selection by the changeover switch 4 and the heater section A output switching by the opening / closing piece 16. (Embodiment 7) Embodiment 7 is shown in FIGS. In the present embodiment, a deflector plate 14 is provided in the middle of the air passage 12 to change the outputs of the upper heater 9 and the lower heater 10 so that the above six types of heating capacity can be selected.

(Embodiment 8) Embodiment 8 is shown in FIGS.
Shown in. In this embodiment, the upper heater 9 and the lower heater 1
By changing the pitch of the 0'radiation fins, the heater 9,
By changing the output of 10 ', the above-mentioned 6 types of heating capacity can be selected.

[0026]

As described above, the present invention is provided with a blower, a heater portion having a heating resistance element having a positive resistance temperature characteristic upon receiving an air flow from the blower, and a radiation fin for radiating the heat of the heating resistance element. And is composed of two heaters capable of producing two independent outputs, and
The heater section is arranged on the downstream side of the curved section of the air flow path, one heater is arranged on the side with a large air flow rate, the other heater is arranged on the side with a small air flow rate, and the output of the heater section is set to 3 Since the switching means for switching to one pattern is provided, the wind speed is faster on the outer side than on the inner side in the vicinity of the curved portion and downstream, and the amount of air blown per unit area is increased, and the switching means provides three different energization patterns. It has the effect of being able to switch the hot air generation capacity in three stages, and thus, there is only one type of heating resistance element, and the blower has a simple configuration with a single output. There is an effect that it is possible to finely switch the heating capacities of three types.

Further, according to a second aspect of the present invention, there is provided a blower, and a heater portion including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower, and a heat radiation fin for radiating heat of the heating resistance element, 2 independent heaters
It is composed of two heaters capable of taking one output, and a deflector plate is provided on the upstream side of the heater section of the air flow passage to make a difference in the amount of air flow passing through the two heaters, and one heater is arranged on the side with the most air flow. Since the other heater is arranged on the side where the air flow rate is small and the switching means for switching the output of the heater section into three patterns is provided, the air flow rate passing through the two heaters is made different by the flow diverter plate. Thus, the switching means forms three kinds of energization patterns, and the hot air generating ability can be switched in three stages.

Further, in the third aspect, the distance between the heat radiation fins of one heater of the heater section is different from the distance between the heat radiation fins of the other heater, so that the distance between the heat radiation fins of one heater of the heater section is different. Is different from the distance between the heat radiation fins of the other heater, and the amount of air passing through each heater is made different, and three kinds of energization patterns are formed by the switching means to generate hot air in three stages. The effect is that it can be switched.

According to a fourth aspect of the present invention, there is provided a blower, and a heater portion including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower and a heat radiation fin for radiating heat of the heating resistance element. 2 independent heaters
It is composed of two heaters capable of taking one output, forms a bypass air passage that does not pass through the heater portion, is provided with opening / closing means for opening / closing this bypass air passage, and is provided with switching means for switching the output of the heater portion into two patterns. Because it is a thing,
By opening and closing the bypass air passage by the opening / closing means, the amount of air blown through the heater portion is changed, and the output of the heater portion is set to 2
By the switching means for switching to one pattern, the effect of being able to switch the hot air generating capacity in four stages is achieved.

Further, according to a fifth aspect of the present invention, there is provided a blower, and a heater portion including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower, and a heat radiation fin for radiating heat of the heating resistance element. 2 independent heaters
It is composed of two heaters capable of taking one output, and a deflector plate is provided on the upstream side of the heater section of the air flow passage to make a difference in the amount of air flow passing through the two heaters, and one heater is arranged on the side with the most air flow. A switch for switching the output of the heater section to three patterns is provided by arranging the other heater on the side with less air flow, forming a bypass air passage that does not pass through the heater section, and providing opening / closing means for opening and closing the bypass air passage. Since the means is provided, the two heaters are provided with different hot air generation capacities, the bypass air passage opening / closing means is used to change the hot air generation capacity of the heater portion, and the switching operation by the switching means is performed. The effect is that the hot air generating capacity can be switched step by step.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the above.

FIG. 3 is a perspective view of the above heater unit.

FIG. 4 is a circuit diagram when the upper heater of the same is turned on.

FIG. 5 is a circuit diagram when the upper heater and the lower heater of the same are turned on.

FIG. 6 is a circuit diagram when the lower heater of the same is turned on.

FIG. 7 is a perspective view of a warm air heater according to a second embodiment of the same.

FIG. 8 is a sectional view of the above.

FIG. 9 is a sectional view of Example 3 of the above.

FIG. 10 is a perspective view of the above heater unit.

FIG. 11 is a sectional view of Example 4 of the above.

FIG. 12 is a sectional view of the above.

FIG. 13 is a circuit diagram of a fifth embodiment of the above.

FIG. 14 is a circuit diagram of the above.

FIG. 15 is a sectional view of Example 6 of the above.

FIG. 16 is a sectional view of the above.

FIG. 17 is a sectional view of Example 7 of the above.

FIG. 18 is a sectional view of the above.

FIG. 19 is a sectional view of Example 8 of the above.

FIG. 20 is a sectional view of the above.

[Explanation of symbols]

 1 Hot Air Heater 4 Changeover Switch 7 Heat-Resistant Element 8 Radiating Fin 9 Upper Heater 10 Lower Heater 12 Lower Heater 12 Air Flow Path 13 Bent Portion 14 Baffle Plate 15 Bypass Air Flow Path 16 Opening / Closing Piece A Heater Unit

Claims (5)

[Claims] 1. A blower, and a heater section including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower and a heat radiation fin for radiating the heat of the heating resistance element. The heater section is independent. 2 outputs can be taken
In addition to one heater, the heater part is arranged on the downstream side of the bent part of the air flow path, one heater is arranged on the side with a large air flow, and the other heater is arranged on the side with a small air flow. ,
A warm air generator, comprising switching means for switching the output of the heater part into three patterns. 2. A blower, and a heater section including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower and a radiating fin for radiating the heat of the heating resistance element. The heater section is independent. 2 outputs can be taken
A heater, and a deflector plate is provided on the upstream side of the heater section of the air passage to make a difference in the amount of air blown through the two heaters.
One of the heaters is provided on the side with a large air flow rate, the other heater is provided on the side with a small air flow rate, and a switching means for switching the output of the heater section into three patterns is provided. Generator. 3. The warm air generator according to claim 1, wherein the distance between the heat radiation fins of one heater of the heater section is different from the distance between the heat radiation fins of the other heater. 4. A blower, and a heater section including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower and a heat radiation fin for radiating the heat of the heating resistance element, the heater section being independent. 2 outputs can be taken
One heater is provided, a bypass air passage that does not pass through the heater portion is formed, an opening / closing means for opening / closing the bypass air passage is provided, and a switching means for switching the output of the heater portion between two patterns is provided. Hot air generator. 5. A blower, and a heater section including a heating resistance element having a positive resistance temperature characteristic upon receiving a flow of air by the blower and a heat radiation fin for radiating heat of the heating resistance element, the heater section being independent. 2 outputs can be taken
A heater, which is provided on the upstream side of the heater section of the air flow path, with a deflector plate for differentiating the amount of air flow passing through the two heaters.
One of the heaters is arranged on the side with a large amount of air flow, and the other heater is arranged on the side with a small amount of air flow to form a bypass air passage that does not pass through the heater section, and an opening / closing means for opening and closing this bypass air passage is provided. A warm air generator, characterized in that it is provided with switching means for switching the output of the heater part into three patterns.