JPS6223226B2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention heats air sucked from an intake port by a cross-flow type impeller using a heating element to generate warm air, and blows the warm air into a room from a discharge port. This relates to an electric hot air heater.

Configuration of conventional example and its problems As shown in Fig. 1, this type of conventional electric hot air heater has an arc-shaped first guide plate 2 disposed outside of a cross-flow type impeller 1. A first tongue portion 3 is formed at one end of the first guide plate 2 close to the outer periphery of the impeller 1, and a first tongue portion 3 is formed at the other end of the first guide plate 2. The first free end 5 is rotatable in the directions of arrows A ₁ to _{A 2} about the first support 4 provided near the impeller 1 . A second guide plate 6 formed into an arc shape is disposed at a position almost symmetrical to the guide plate 2, and at one end of the second guide plate 6, a first A second tongue 7 is formed near the outer periphery of the impeller 1 at a position that is almost symmetrical to the tongue 3 , and the other end of the second guide plate 6 is formed near the second tongue 7 . The second pillar is rotatable in the directions of arrows B ₁ to _{B 2} around the second support 8 provided in the
The free end is 9. The angle between the first tongue portion 3 and the second free end 9 with respect to the rotation center of the impeller 1 is θ ₁ , and the angle between the second tongue portion 7 and the first free end 5 is θ 1 . θ ₂ and the relationship θ ₁ >θ ₂ , by rotating the impeller 1 in the direction of the dashed arrow a, a vortex flow in the direction shown by the dashed-dotted arrow b is generated near the second tongue portion 7. from the first opening 10 consisting of the first tongue 3 and the second free end 9 to the second opening 10 consisting of the second tongue 7 and the first free end 5. An air flow shown by the solid arrow towards the opening 11 of 2 is formed.
In addition, by rotating the first guide plate 2 and the second guide plate 6 so that θ ₁ <θ ₂ is satisfied, a vortex is formed near the first tongue portion 3.
An air flow can be formed from the second opening 11 towards the first opening 10. That is,
By rotating the first guide plate 2 and the second guide plate 6 about the first support column 4 and the second support column 8, the air supply direction can be reversed.
In this case, a heating element (not shown) is disposed inside the first opening 10 or the second opening 11 to serve as a heat source, so that it can be used for heating.

However, in the above configuration, the air blowing direction is limited to two directions, and the first opening 1
The angle θ ₀ between the direction of the intake air flow from the second opening 11 and the direction of the discharge air flow from the second opening 11 is θ ₀ ≒
Since the angle is around 90 degrees, a so-called short circuit condition is likely to occur, where the discharge flow flows directly around the guide plate toward the suction port, and as a result,
This has the disadvantage that the heating capacity is significantly reduced, and since the air supply direction is fixed, it has the disadvantage that the temperature distribution in the indoor space cannot be made uniform.

Purpose of the Invention In view of the above-mentioned conventional drawbacks, the present invention is capable of reducing the occurrence of so-called short circuit, in which the airflow discharged from the discharge port flows directly to the intake port. It is an object of the present invention to provide an electric hot air heater that can discharge hot air in any direction around a rotating shaft.

Structure of the Invention In order to achieve the above object, the present invention provides a first guider and a second guider that are disposed facing each other across a cross-flow type impeller, and are located upstream of the impeller. and the first guider and the second guider
The guider forms an intake port, and the first guider and the second guider located downstream of the impeller form a discharge port, and the impeller, the first guider, and the second guider The first guider is integrally connected between a rotary plate provided below the impeller and a support plate provided above the impeller in order to keep their positional relationship constant. is provided with a first tongue located on the downstream side of the impeller and close to the outer periphery of the impeller, and the second guider has a surface that faces the first tongue and the impeller, and the second guider has a surface that faces the first tongue and the impeller. The arcuate surface is formed in an arc shape, and one end of the arcuate surface located on the upstream side of the impeller is provided with a second tongue close to the outer periphery of the impeller, and the arcuate surface extends from the one end to the other end. A gap between the impeller and the outer periphery of the impeller is gradually expanded, and a honeycomb-shaped heating element is disposed at the discharge port, and the heating element is connected to the first guider and the second guider. The impeller is integrally configured to be rotatable around the rotation axis of the impeller.

According to the above configuration, when the impeller rotates and an airflow is formed, the vortex, which is the center of airflow formation, is directed to the second tongue facing the first tongue provided on the first guider.
Because this vortex is formed near the outer periphery of the impeller on the guider side of the impeller, the airflow sucked into the impeller from the intake port flows across the impeller and then flows into the second impeller.
The air flows along the guider, and is heated by a heating element at the outlet in the same direction as the intake port and is discharged as warm air. The occurrence of so-called short circuits, where the air flows directly to the intake port, has been significantly reduced, and since a honeycomb-shaped heating element is installed at the discharge port, the airflow that is discharged from the impeller is not included. Unstable flows such as vortices are rectified as they pass through the honeycomb-shaped heating element, which helps prevent noise caused by turbulence and maintains a nearly uniform temperature from the entire discharge port. It is possible to discharge hot air having a distribution, and since the heating element, the first guider, and the second guider are integrally configured to be rotatable about the rotation axis of the impeller, the temperature can be increased. It has various excellent features such as being able to continuously change the direction of air discharge around the rotation axis of the impeller, thereby making the indoor temperature distribution more uniform.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

FIG. 2 shows a top sectional view for explaining the operating principle of an electric hot air heater according to an embodiment of the present invention, and FIG. 3 shows a perspective view of the same electric hot air heater. .

In FIGS. 2 and 3, reference numeral 21 denotes a cross-flow type impeller. This impeller 21 is arranged vertically, and below the impeller 21 is an electric motor 22 for rotating the impeller 21. has been set up. Reference numerals 23 and 24 denote a first guider and a second guider, which are disposed facing each other with the impeller 21 in between, and are located upstream of the impeller 21 and are connected to the first guider 23. An intake port 25 is formed with the second guider 24, and the impeller 2
A discharge port 26 is formed by the first guider 23 and the second guider 24 located on the downstream side of the discharge port 1 . In addition, in order to maintain a constant positional relationship between the impeller 21, the first guider 23, and the second guider 24, a rotary plate 27 provided below the impeller 21 and a rotary plate 27 provided above the impeller 21 are connected to each other. It is integrally connected to a support plate 28 provided therebetween. Therefore, by rotating the rotating plate 27, the first
The guider 23 and the second guider 24 rotate along the outer periphery of the impeller 21 about the rotating shaft 21a of the impeller 21 in the direction of the arrow c--c' in FIG. Reference numeral 29 denotes a first tongue portion provided on the first guider 23, and this first tongue portion 29 is connected to the impeller 21.
The impeller 21 is located downstream of the impeller 21 and is formed close to the outer periphery of the impeller 21 . Further, the second guider 24 has a surface 30 that faces the first tongue portion 29 and the impeller 21 and is formed into a substantially arc shape, and one end of the arc surface 30 is located upstream of the impeller 21. A second tongue portion 31 close to the outer periphery of the impeller 21 is provided in the portion.
The arcuate surface 30 is formed so that the gap between it and the outer periphery of the impeller 21 gradually increases from one end to the other end. 32 is a honeycomb-shaped heating element disposed at the discharge port 26;
As the rotating plate 27 rotates, this heating element 32 also moves along the outer periphery of the impeller 21 along the rotation axis 21a of the impeller 21 along with the first guider 23 and the second guider 24 as shown in FIG. Arrow c-
It rotates in the c′ direction. Further, the horizontal wall surface of the honeycomb-shaped heating element 32 is inclined from approximately the vertical center of the discharge port 26 so that the upper part thereof deflects the discharge flow upward, and the lower part thereof tilts so that the discharge flow deflects downward. It is molded in a flat state.

Further, the rotary plate 27 is automatically rotated by using the electric motor 22 as a power source via a cam, gears (none of which are shown), or the like. 33 is a base of the electric hot air heater, and this base 33 has the electric motor 22 built therein. Reference numeral 34 denotes a protective net arranged to prevent pieces of paper and the like from flowing into the electric hot air heater.

The operation of the above configuration will be explained next.
When the impeller 21 rotates in the direction of the dashed arrow d, external air is sucked in from the intake port 25 as shown by the solid arrow, and this airflow flows from near the upstream of the first tongue 29 to the second guider 24. Arc surface 30
It flows across the impeller 21 in the direction of , and then flows along the inner surface of the second guider 24 and is heated by the honeycomb-shaped heating element 32 to become hot air, and this hot air flows through the discharge port 26 is discharged from the machine. In this case, since the air flow is made to flow as shown by the solid line arrow in FIG. The airflow is formed near the outer periphery of the impeller 21 on the guider 24 side, and as a result, the airflow that has flowed across the impeller 21 is
The air flows along the inner surface of the guider 24, is heated by the heating element 32 at the discharge port 26, becomes hot air, and is discharged outside the machine. In this case, intake port 2
The direction of the intake airflow from 5 and the direction of the discharge airflow from the discharge port 26 are approximately the same direction, that is, approximately 180°
゜, it is possible to significantly reduce the occurrence of a so-called short circuit in which the airflow discharged from the discharge port 26 flows directly to the intake port 25, and as a result, heating efficiency is further improved. be able to. Furthermore, since the heating element 32 provided at the discharge port 26 has a honeycomb shape, it acts to rectify the turbulent components contained in the airflow flowing out from the impeller 21, and as a result, the turbulent components Since the temperature is suppressed, the air blowing capacity can be increased, and at the same time, the generation of noise can be suppressed, and hot air having a substantially uniform temperature distribution can be discharged from the entire discharge port 26. Then, by rotating the rotary plate 27 again, the first guider 2
3. The first guider 23, the second guider 24, and the heating element 32 can be rotated while keeping the positional relationship between the second guider 24, the heating element 32, and the impeller 21 constant. By rotating the rotary plate 27, the inflow and discharge directions of air can be changed in any direction around the rotation axis of the impeller 21 without changing the air blowing performance. Further, since the horizontal wall surface of the heating element 32 is formed to be inclined, air is blown in the direction of the rotation axis of the impeller 21, that is, in the vertical direction.

Effects of the Invention As described above, according to the electric hot air heater of the present invention, when the impeller rotates and air is formed, the vortex, which is the center of air flow formation, flows through the first guider provided in the first guider. Because this vortex is formed near the outer periphery of the impeller on the second guider side facing the tongue of the , the air flows along the second guider, and is heated by a heating element at the discharge port in the same direction as the intake port, and is discharged as warm air. The occurrence of so-called short circuits, where air flows directly to the intake port, is greatly reduced, and as a result, heating efficiency can be improved.Also, a honeycomb-shaped heating element is installed at the discharge port. Therefore, unstable flows such as eddy currents contained in the airflow discharged from the impeller are rectified when passing through the honeycomb-shaped heating element, and as a result, noise caused by turbulence is reduced. In addition to being useful for preventing generation, warm air having a substantially uniform temperature distribution can be discharged from the entire discharge port, and the heating element, the first guider, and the second guider are integrally connected to the rotation of the impeller. Since it is configured to be rotatable around the shaft, the direction of hot air discharge can be continuously changed around the rotation axis of the impeller, resulting in a more uniform temperature distribution in the room. It has various excellent features such as:

[Brief explanation of the drawing]

FIG. 1 is a top sectional view showing a conventional electric hot air heater, and FIG. 2 is a top sectional view for explaining the operating principle of an electric hot air heater in an embodiment of the present invention.
FIG. 3 is a perspective view of the electric hot air heater. 21...impeller, 21a...impeller rotation shaft,
23...first guider, 24...second guider, 25...intake port, 26...discharge port, 27...
rotating plate, 28... support plate, 29... first tongue section,
30... Arc surface, 31... Second tongue, 32...
heating element.

Claims (1)

[Claims] 1 A first guider and a second guider are arranged facing each other with a cross-flow type impeller in between, and the first guider and the second guider are located upstream of the impeller. an intake port is formed by the first guider and the second guider located downstream of the impeller, and a discharge port is formed by the first guider and the second guider located downstream of the impeller; is integrally connected between a rotary plate provided below the impeller and a support plate provided above the impeller in order to maintain a constant positional relationship between them, and the first guider , a first tongue portion located downstream of the impeller and close to the outer periphery of the impeller is provided, and the second guider has a substantially arc-shaped surface that faces the first tongue portion and the impeller with the impeller in between. One end of this arcuate surface located on the upstream side of the impeller is provided with a second tongue close to the outer periphery of the impeller, and the arcuate surface extends from this one end to the other end of the impeller. A honeycomb-shaped heating element is disposed at the discharge port, and the heating element and the first guider and the second guider are integrally formed. An electric hot air heater configured to be rotatable around the rotation axis of the impeller.