JPH0231599Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a fan that can be used as both a hot air fan and a warm air fan during cold weather, which can be used selectively throughout the year.

(b) Prior art In order to use one blower as both an electric fan and a warm air fan, there are devices in which a heating unit containing a heater can be detachably attached to the blower blade housing via a locking piece; It is known that a plurality of heaters, in which adjacent heater frames are engaged with each other, are arranged in parallel in the air passage in front of the blades so as to be able to slide in the vertical direction. However, the former requires not only the trouble of attaching and detaching the heating unit when switching between the electric fan and the hot air fan, but also requires space to store the separated heating unit. On the other hand, in the latter case, switching between a fan and a warm air fan does not require as much trouble as in the former case, but the heater cannot be removed from the air flow path when used as a fan.
In other words, if the heater is lowered in front of the blades, it will become an obstruction to the air flow if it is lowered in the air flow path, and if it is possible to obtain strong wind suitable for cooling in this state, it can be used as a hot air fan. When this happens, the wind is too strong and the capacity of the blower is wasted.

A method of switching the rotation of the blower between forward and reverse directions has been proposed as a way to solve this space-saving and handling problem and to utilize the blower efficiently. In other words, when the blower is used as an electric fan, the blades are rotated in the direction with good air blowing efficiency to obtain strong air suitable for cooling, and when used as a hot air fan, the blades are rotated in the opposite direction with poor air blowing efficiency to generate a heater. There are also known structures that reduce the amount of air passing through and obtain weak warm air suitable for heating, but they have the following problems.

(1) The direction of air flow is reversed when used as an electric fan and as a hot air fan.

(2) Only heating effects due to air convection can be expected.

(c) Purpose of the invention This invention was made in view of these circumstances, and one of its main purposes is to fully demonstrate the performance of both a hot air fan and an electric fan, and to use it as a hot air fan. To provide an electric fan that can be used as a hot air fan and which can easily and reliably perform a heater switching operation. Another purpose of this invention is to provide a fan that also functions as a hot air fan, which does not require reversing the direction of air blowing and can also utilize the reflected heat of the heater.

(d) Structure of the invention This invention consists of a main body case that has an exhaust port on the front and an intake port on the rear, forming a flow path between the exhaust port and the intake port, and a flow path in the main body case. A blower installed in the flow path, a heater and its reflection plate, a heater position switching support means for supporting the heater and its reflection plate so that the position can be switched inside and outside the flow path of the main body case, and a heater and its reflection plate installed in the flow path. the heater position switching means is comprised of a pair of slide plates disposed opposite to each other through the flow path in the main body case, each of the slide plates being configured to control the heater and its reflector; The main body case is slidably supported by narrowing the flow path in front of the blower, and is equipped with two long holes that can slide the heater and its reflector out of the flow path of the main body case by sliding operation, In addition, the operating circuit includes a main switch that can turn on and off the blower and heater at the same time, and when the main switch turns on the blower and heater, the heater and its reflector are turned on and off by sliding operation of the heater and its reflector. This electric fan is equipped with a heater switch that turns off the heater when placed outside the flow path of the case.

In other words, this invention enables the heater and its reflector to be switchably supported in and out of the air flow path by a specific slide plate, thereby making it possible to fully demonstrate the respective performance as a warm air fan or electric fan. , it is not necessary to reverse the direction of air blowing, and the reflected heat of the heater can also be used. Furthermore, this device has an operating circuit that includes a main switch that can turn on and off the blower and heater at the same time, and a heater switch that can turn off the heater by positioning the heater outside the blower's air flow path. It is safe to turn off the heater when it is located outside the ventilation flow path.

(e) Embodiments This invention will be described in detail below based on embodiments shown in FIGS. 1 to 7. Note that this invention is not limited thereby.

First, the hot air fan 1 mainly includes a main body case 2 of the blower (hereinafter also simply referred to as the case), a blower 3 provided inside the case 2, and a heater 4.

Case 2 has upper and lower, left and right metal side plates 2a and 2b.
The case 2 has a rectangular parallelepiped shape with an exhaust port 5 on the front and an intake port 6 on the rear, and a safety cover 7 is attached to the front of the exhaust port 5 of the case 2. The motor 9 of the blower 3 equipped with blades 8 is held by two pillars 10, and these pillars are held by screws 11 on the upper and lower side plates 2a, 2a on the rear side of the case 2. Inside the left and right side plates 2b, 2b of the case 2, two heater slide plates 12, which serve as heater position switching support means and which are arranged at vertically symmetrical positions, sandwich a sleeve 13 and a screw 14.
and is fixed with a nut 15 (see especially Fig. 5).

The heater 4 is fixed at both ends to a reflecting plate 17 by holding fittings 16, and the reflecting plate 17 has both left and right ends fixed to the heater slide plate 12 by two screws 18 for rotating and sliding the heater. It is slidably attached to two long holes 19 and 20 of. The rotating and sliding movement of the reflecting plate 17 along the elongated holes 19 and 20 having a width slightly wider than the outer diameter of the screw 18 is made smooth, and the moving reflecting plate 17 is
In order to prevent contact with the elongated holes 19, 20, an appropriate curvature is provided. In addition, in order to hold the heater 4 in the stored state shown in FIG. 3 and the heater 4 in the used state shown in FIG. Sections 19a and 20a are provided. Heater 4
Although a quartz tube as shown in the figure is suitable for this purpose, known heaters such as nichrome wire heaters, honeycomb heaters, etc. can also be used. In this case, it goes without saying that the structure of the mounting portion may require some modification depending on the type of heater used.

A main switch 21 for starting and stopping the blower 3 is provided on the upper side plate 2a of the case 2.

When the device is configured as described above, when used as a hot air fan, the heater 4 is rotated and slid along the elongated holes 19 and 20 together with the reflector 17 to be placed in front of the blades 8, that is, in the air flow path of the fan. When the air flow path is narrowed (Figs. 2 and 4), the reflector 17 in front of the blades 8 reduces the air volume of the blower 3, and the temperature is lowered to a weak temperature suitable for heating heated by the heater 4. It can send out wind. When used as an electric fan, the heater 4 is rotated and slid together with the reflecting plate 17 along the long holes 19 and 20, and is housed in a position facing the upper and lower side plates 2a and 2a of the case 2 (Figs. 1 and 3). Since there is no obstruction to the wind in front of the blades 8, that is, in the air flow path of the blower, strong wind suitable for cooling can be obtained with less wind noise.

Furthermore, when used as a hot air fan, the heating effect due to reflection from the reflector plate 17 is added to the heating effect due to air convection, so heating efficiency can be improved. Furthermore, when used as an electric fan, the reflector plate 17 serves as a protective cover for the heater 4 moved to the storage position and prevents dust etc. from adhering to the heater 4. The generation of burning smells such as dust will be reduced.

Reference numeral 23 in FIG. 7 shows the operating circuit of the heater 4 and the blower 3. When the reflector 17 is moved in front of the blade 8, it is turned on by being pushed by the reflector 17 at two locations inside the case 2, upper and lower. micro switch 22
is provided in series with the heater 4. The heater main switch 21 is connected so as to turn off the motor 9 of the blower 3 and the heater 4 at the same time, and the heater 4 is configured to be energized only when both switches 22 and 21 are turned on.

When the device is configured as described above, the reflector plate 17
Since the heater 4 will not be energized unless the user turns on the micro switch 22, the risk of energizing the heater 4 in the stored state can be reliably eliminated. Further, in both summer and winter, the user only needs to operate the main switch 21, which is convenient.

In addition, in each of the above embodiments, a case has been described in which two heaters are housed so as to face each other on the upper and lower side plates of the case, but the number of heaters may be one, and it may be housed on the left and right side plates of the case. .
Furthermore, by making holes of an appropriate size in the reflector, the temperature and volume of hot air can be easily adjusted.

(f) Effects of the device This device is equipped with a switch that can move the heater inside and out of the air passage of the blower, and turns the heater on and off by moving the heater. Alternatively, the switching can be easily and reliably performed without degrading the performance of each fan. It is particularly practical in both summer and winter because the user only needs to operate the main switch. Furthermore, since a reflector for the heater is provided, the reflected heat from the heater can be utilized.
Furthermore, since the heater and its reflector are supported on the slide plate so that their positions can be switched between inside and outside the air flow path, there is no need to rotate the air blower forward or backward.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the present invention when used as an electric fan, FIG. 2 is a perspective view of the same when used as a hot air fan, FIGS. 3 and 4 are longitudinal sectional views, and The figure shows the heater when it is stored, and FIG. 4 shows the heater when it is in use. FIG. 5 is an exploded perspective view with the upper and lower side plates removed, FIG. 6 is a cross-sectional view of the main part of the reflection plate mounting portion, and FIG. 7 is a motor operating circuit diagram of the heater and blower. 1... Warm air fan, 2... Case, 3...
...Blower, 4...Heater, 5...Exhaust port, 6...
Intake port, 21...main switch, 22...micro switch, 23...operating circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A main body case that has an exhaust port on the front and an intake port on the rear, forming a flow path between the exhaust port and the intake port, and the inside of the flow path of this main body case. a blower installed in the main body case, a heater and its reflector, a heater position switching support means for supporting the heater and its reflector so that their positions can be switched inside and outside the flow path of the main body case, and an operating circuit for the blower and the heater. The heater position switching means is comprised of a pair of slide plates disposed opposite to each other through the flow path in the main body case, and each of the slide plates moves the heater and its reflection plate to the position of the blower. The main body case is slidably supported by narrowing the flow path of the main body case at the front, and is provided with two long holes that can slide and guide the heater and its reflection plate out of the flow path of the main body case by sliding operation, and the above-mentioned The operating circuit consists of a main switch that can turn on and off the blower and heater at the same time, and when this main switch turns on the blower and heater, it slides the heater and its reflector to move the heater and its reflector from the main body case. This electric fan is equipped with a heater switch that turns off the heater when placed outside the flow path.