JPH04113162A - Hot air heater with air cleaning function - Google Patents

Abstract

PURPOSE:To obtain a hot air heater with an air purification performance which protects a user from his contact with non-heated air discharged from a blowoff port by providing a damper which switches over the direction of air blowoff so that air may be discharged from a cooled air blowoff port installed to the rear side of said damper during non-heating time by heating means. CONSTITUTION:A cooled air blowoff port 6a, which discharges cooled air, is installed to the lower part equivalent to a hot air blowoff port 2a in a housing 6. A damper A, which switches over the direction of air blowoff, is installed between this cooled air blowoff port 6a and an electric heater 14. When the heating operation is turned OFF, or when it is used as an air cleaner, the damper A is actuated so that the air may be exhausted from the cooled air blowoff port 6a installed to the rear side of the damper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot air fan having an air purifying function.

[Conventional technology] Conventional hot air fans heat the air they suck in using a heating device, blow it out from a hot air outlet installed at the bottom of the front, and also purify the air they suck in, making it suitable for use outside of winter. There is something that is possible.

[Problems to be Solved by the Invention] However, in the above-mentioned hot air fan with an air purifying function (especially for home use), the hot air outlet provided at the lower front of the fan is not used as an air exhaust port even when used as an air purifier. Due to this, when the room temperature is relatively low, such as in early spring or early autumn, there is a problem in that the wind blown out from the outlet hits the user, making the user feel cold.

The present invention has been made in view of the above-mentioned points, and its purpose is to provide a hot air fan with an air purifying function that prevents unheated air blown from the outlet from hitting the user. It's about doing.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an air blowing means for blowing out air sucked in from an air suction port from a warm air outlet provided at the front, and a cleaner for cleaning the sucked air. a heating means for heating the air blown out from the hot air outlet, and a damper for switching the air blowing direction so that the air is blown out from the cold air outlet provided on the back side when the air is not heated by the heating means. There is.

In addition, the damper is, for example, equipped with a blower control plate that switches the direction of air circulation between the heating means side and the cold air outlet side, and a heating wire that is tightly wound around the plate to apply rotational force in one direction to the blower control plate. The shape memory alloy spring is formed into an ellipse with a spring that applies rotational force to the ventilation control plate in the opposite direction to the shape memory alloy spring, and the shape memory alloy spring is heated or not heated when the air is heated or not. The air blowing direction may be changed by controlling the non-heating state, changing the balance of the spring forces of the respective springs, and rotating the air blowing control plate.

In a warm air fan with an air purifying function using the above damper, the air is heated to a predetermined temperature by a heating means to prevent cold air from being blown out from the hot air outlet before the air is sufficiently warmed. It is preferable to provide a delay means for delaying the heating of the heating wire and for delaying the switching of the air blowing direction toward the hot air outlet by the damper in accordance with the time delay until the hot air blows out.

Furthermore, in order to provide comfortable heating, a human body detection sensor that detects the presence of a human body in the room and a temperature sensor that detects the room temperature are installed. It is preferable to provide an automatic operation mode in which the apparatus automatically starts operation and automatically adjusts the room temperature to a set temperature, and automatically stops operation when a human body is not detected.

[Function] The present invention provides a cold air outlet on the back side separately from the hot air outlet provided on the front side as described above, so that air is blown out from the cold air outlet when the air is not heated by the heating means. By being equipped with a damper that switches the air blowing direction,
The cold air is exhausted from the back side to prevent the cold air from hitting the user.

[Example] An embodiment of the present invention is shown in FIGS. 1 to 7.

The hot air fan of this example is a stationary type as shown in Fig. 4,
A body 5 is provided with a base 3 at the lower part, and a body 5 having openings 5b and 5c formed in two upper and lower locations on the base 3 (see FIG. 1 or FIG. 5(b)), this body An upper cover 1 is attached to the upper front of the body 5, a lower cover 2 in which a hot air outlet 2a is formed is attached to the lower front of the body 5, and a housing 6 is attached to the back of the body 5.

Note that a handle portion 6b is recessed in the upper part of the housing 6, as shown in FIG.

As shown in FIG. 5(b), a shade removal motor 15 is provided in an opening 5b provided in a portion corresponding to the upper cover 1 of the body 5.
and a ventilation means consisting of a sirocco fan 16,
Air is sucked in from air suction ports 5a (see FIG. 5(a)) formed on both sides of the body 5 in correspondence with this air blowing means and sent downward. Here, a cleaning means consisting of a fiber filter 10 and a deodorizing filter 11 is disposed on the back side of the upper cover 1, which serves as a flow path for the air sucked in from the air suction port 5a, and the fiber filter 10 removes contaminated air. At the same time, the deodorizing filter 11 deodorizes the air that has passed through the fiber filter 10.

An electric heater 14 as a heating means is attached to an opening 5C of the body 5 formed corresponding to the hot air outlet 2a of the lower cover 2 using a fitting 12.13, and the air sent from the blowing means is heated by an electric heater 14, and the hot air is passed through the punching net 18 placed on the front side to the hot air outlet 2.
Make it blow out from a.

At the lower part of the housing 6 corresponding to the hot air outlet 2a, there is a cold air outlet 6a that blows out cold air, as shown in FIG.
A damper A is provided between the cold air outlet 6a and the electric heater 14, as shown in FIG. 1, for switching the air blowing direction.

As shown in FIG. 2, the damper A includes a blower control plate 4 that switches the direction of air circulation between the electric heater 14 side and the cold air outlet 6a side, and a heating wire 17 that is tightly wound around the air blower control plate 4, which is arranged in one direction. It is composed of a shape memory alloy spring 8 that applies rotational force to the air blow control plate 4, and a spring 9 that applies a rotation force to the air blow control plate 4 in the opposite direction to the shape memory alloy spring 8.

The ventilation control plate 4 is formed by bending a flat plate into a dogleg shape in cross section, and has rotating shafts 4a protruding from both side edges.

A pair of mounting pieces 13a protrude from the back side of both sides of the rectangular frame-shaped fixture 13 on the back side to which the electric heater 14 is attached.
It is supported on a shaft so that it can rotate freely.

The shape memory alloy spring 8 is made of a Ti--Ni alloy or the like, and has insulated terminals 8a attached to both ends as shown in FIG. Here, both ends of the shape memory alloy spring 8 are adhesively fixed to the insulating terminal 8a through round holes 8b formed in two places in the insulating terminal 8a. The heating wire (Kanthal wire) 17, which is tightly wound around the formation memory alloy spring 8, heats the shape memory alloy spring 8, and this heating causes the shape memory alloy spring 8 to contract and expand. The shape memory alloy spring 8 of this embodiment is designed to contract into a shape memory state when heated. Both ends of the heating wire 17 are caulked and fixed to round crimp terminals 19 together with a lead wire 18 for supplying current to the heating wire 17. Insulated terminal 8 on one end side of this spring 8
a is a pair of fixing pieces 4b protruding from one side of the lower surface of the ventilation control board 4 in FIG. 2 along with a round crimp terminal 19°;
The insulated terminal 8a on the other end side is rotatably fixed together with the round crimp terminal 19 to a fixing piece 13b protruding from one end side of one mounting piece 13a of the fixture 13. It is.

The spring 9 is a normal coil spring, and when the shape memory alloy spring 8 contracts due to heating, the spring force becomes weaker than that of this spring 8, and the spring force is stronger when the shape memory alloy spring 8 is not heated. A hook portion formed on the lower bent surface of the ventilation control plate 4 opposite to the bent surface on which the fixed piece 4b is formed, and on the side opposite to the fixed piece 4b. 4C and the other mounting piece 13b of the fixture 13
Both ends are hooked and attached between a hook piece 13c protruding from the other end side.

That is, in the damper A, the shape memory alloy spring 8 is controlled to be in a heated state or a non-heated state depending on whether the air is heated or not, and the balance of the spring force of each of the springs 8 and 9 is changed. The air blowing control plate 4 is rotated as shown in FIGS. 1(a) and 1(b), thereby changing the air blowing direction.

The warm air fan of this embodiment has an automatic operation function that automatically starts operation when a person enters the room and automatically stops operation when a person leaves the room. As shown in FIG. 4(a) or FIG. 6, a human body detection sensor 7 is provided. In addition, this human body detection sensor 7
The automatic operation switch SW2, which is set to this automatic operation mode, may be of any type, such as an ultrasonic type or a hot wire type. Arranged on the top surface, in addition to this automatic operation switch SW2, there are a power important switch SWl, a continuous operation switch SW2, a temperature setting switch sw, which sets the temperature up and down in 5 steps, and a heating cut-off switch SW6.
This is provided. Note that the automatic operation switch SW2, the continuous operation switch SW7, and the heating cut-off switch SWa each have display lamps L, L2, . The temperature setting switches sw, . . . , sw5 are provided with display lamps L, . In order to maintain the room temperature at the temperature set by the temperature setting switches sw, , sw, the hot air fan of this embodiment includes a thermistor 20 as a temperature sensor that detects the indoor temperature. The thermistor 20 is disposed within the housing 6, and an air intake port 6c is formed in the housing 6 where the thermistor 18 is disposed so as to easily detect the room temperature (FIG. 4(d)).

FIG. 7 shows the internal circuit of the hot air fan of this embodiment.

The internal circuit of this embodiment is roughly divided into a mode setting section 21 that sets the operating mode, and a temperature setting section 2 that sets the room temperature.
2, a motor drive control section 23 that drives the motor 15,
It consists of a temperature adjustment section 24 that controls the operation of the electric heater 14 to adjust the room temperature to a set temperature, and a heating cut-off chamber section 25 that sets the heating off state. The mode setting section 21 is
The operation of each of the above parts is switched between an automatic operation mode and a continuous operation mode in accordance with the operation of the power on/off switch SW, the automatic operation switch SW2, and the continuous operation switch SW. The temperature setting section 22 includes a temperature setting switch sw4.
The set temperature can be set in stages by operating the sw, but when switching to automatic operation mode, it is always at medium temperature! ! ! (the intermediate switching suspension of the third stage) is set as the initial setting. The motor drive control unit 23 drives the motor 15 when the human body detection sensor 7 detects the presence of a human body indoors when the automatic operation mode is set, and drives the motor 15 after a certain period of time when leaving the room. automatically stops. Note that in the continuous operation mode, the motor 15 is continuously driven.

The temperature adjustment unit 24 controls the heating of the electric heater 14 so that the room temperature detected by the thermistor 20 becomes the set temperature set by the temperature setting unit 22. It has a function of driving only the main heater H1 and, if the room temperature is considerably lower than the set temperature, also heats the auxiliary heater H2 to quickly reach the set temperature.

The operation of the internal circuit will be explained below. First, when you turn on the power switch SW, the flip-flop F F
+ output Q1 becomes "H", and at this time, flip-flop FF is in the beam set state, so flip-flop 1FF2 is set through analog switch A S +, thereby entering automatic operation mode. At this time, the automatic operation display lamp L1 is lit by the output of the flip-flop FF2. Also, when the power important switch SW1 is turned on, both inputs of the AND gate AND are “H”.
”, so the temperature setting section 22 is set at “H” output at this time.
is initialized. In other words, this AND gate AND,
The output of the flip-flops FF, ~FF.

are set respectively, and the temperature is initially set to a medium temperature state.

At this time, the display lamps L3 to L for temperature display are lit with the output of each 7 lip 70 tubes FF, to FF.

In this way, the output of the 7-lip 70-tube FF, ~FF, is
When it becomes "H", flip-flop FF, -FF a
Analog switches AS, ~AS, are provided at the subsequent stage. ,
By the switching circuit 26 consisting of the AND gate A N D +□~AND, and the inverter gates 11~I4, only the output of the flip flora 7FF is connected to the resistor voltage divider circuit 271+
27□, which causes its resistive voltage divider circuit 27,
．． The reference voltage determined by 27□, that is, the reference voltage for medium temperature setting, is applied to the comparators CP I and C of the temperature adjustment section 24.
given to P 2. Here, if you want to raise the set temperature, just press the switch SW. If you press the switch SW4 once in the initial setting state described above, the output of the flip-flop FF will be "H". Therefore, the output of the AND gate AND becomes "H" when the switch SW4 is pressed, thereby setting the flip-flop FF and raising the set temperature by one step. If you press it again in the same way, you can raise the temperature setting one more step. On the other hand, if you want to lower the set temperature, just press the switch SW, and press the switch SW once in the medium temperature setting state.
If you press , the output of the AND gate AND will be H°
”, the flip-flop FF is reset and the set temperature is lowered by one step. In the same way, each time the switch SW is pressed, the set temperature can be lowered by one step. However, the lowest temperature setting state is set. flip flop FF
4 cannot be reset, and the lowest temperature setting state is reset only when the heating is turned off, which will be described later.

In this automatic operation mode, the human body detection sensor 7
When the presence of a human body in the room is detected, the AND gate AND of the motor drive control section 23 is activated. The output is “H”
”, the timer T2 (for example, the time limit is set to 10 minutes) starts the time limit operation, and the timer T2 at this time
, conducts the phototriac PT at the output and connects the motor 1.
Drive 5.

Note that this driving state of the motor 15 continues until after the time limit operation time of the timer T2 has elapsed after the person leaves the room. When the motor 15 is driven as described above, at the same time, the temperature detected by the thermistor 20 is compared by the comparator CP of the temperature adjustment section 24, and if the room temperature is lower than the set temperature, the output of the comparator CP is becomes “H” and timer T
1 (for example, by setting the time limit to 1 minute) starts the time limit operation. As a result, Phototriac PT2
conducts, the relay RV + is driven, and the contact r closes, thereby energizing the main heater H1 and causing the electric heater 14 to start heating the air. Note that when the phototriac P T 2 becomes conductive as described above, the heating wire 17 is also energized, which causes the shape memory alloy spring 8 to contract and the damper A to be in the state shown in FIG. 1(b). operatively, air from the sirocco fan 16 is sent to the electric heater 14.

Also, as described above, the output of the comparator CP is
In the state of "H", the output detected by the thermistor 20 is also input to the comparator CP, and this comparator C
When the room temperature is lower than the reference voltage of P2 (the reference voltage of comparator CP2 is set lower than the reference voltage of comparator CP), AND gate A N D
The output of + a becomes "Ho", and as a result, the 7 automatic triac PT becomes conductive and the relay R1'z is driven, thereby heating the auxiliary heater H2 of the electric heater 14 and rapidly reaching the set temperature. Electric heater 14 is operated to raise the temperature. Note that heating by the auxiliary heater H2 is stopped when the room temperature reaches the reference voltage of the comparator CP2.

When the set temperature is reached, the output of the comparator CP becomes "off", and the heating of the main heater H7 is also stopped after the time limit operation time of the timer T has elapsed, so that the main heater H4 is in the heating and non-heating states. Repeat this to keep the room temperature constant according to the set temperature.

Next, a case of continuous operation will be explained.

For continuous operation, press the continuous operation switch SW3. However, by connecting each switch SW2 to SW6 to the power supply via the analog switch AS, if the power important switch SW is not turned on, each switch SW
2~SW is set not to work. Continuous operation switch SW as described above.

When is pressed, flip 70 1 FF 3 is set,
Use that output to reset the 7 lip-flop FF2,
Cancel the automatic operation mode and set it to continuous operation mode, and turn on the indicator lamp L for continuous operation with the output Q of Flip Flora 1FF.
Turn on 2. When it comes to this continuous operation mode, Flip Flora 1FF.

The motor 15 is driven by the output. In addition, the electric heater 14
The operation is controlled by ANDing the output Q of the flip-flop FF and the output of the comparator CP using an AND gate ANDll. In other words, the heating of the main heater H7 is controlled so that the room temperature becomes the set temperature. The operation of the auxiliary heater H2 is controlled in the same manner as in the automatic operation mode.

By the way, if you want to turn off the heating state in the automatic operation mode or continuous operation mode mentioned above, just press the heating cut-off switch SW. When the heating cut-off switch SW6 is pressed, the flip-flop FF is set and the heating is turned off. The off indicator lamp L lights up, and the analog switch A S + y turns off, causing the relay RV + ,
The power supply to RY 2 is cut off, and the heater) l 1.
The power supply to H2 is stopped and heating of the air is stopped. At this time, the power to the heating wire 17 is also stopped, so the heating of the shape memory alloy spring 8 is stopped, and after a certain period of time, Danno<A reverses its operation to the state shown in FIG. 1(a). , the air is exhausted from the cold air outlet 6a provided on the back side. Also, the flip-flop FF at this time.

The output resets the flip-flops FF, -FF, and cancels the temperature setting state in the temperature setting section 22. However, in this state, the air purifying function is maintained as is.

To cancel this heating off state, press any of the temperature setting switches SW, SW, and the AND gate A.
The output of N D2 becomes "H", the flip-flop FF is reset, and the power on/off switch SW
In the same way as when + is turned on, the temperature setting section 22 sets the medium temperature state which is the initial setting temperature.

By the way, in this embodiment, when the heating is turned off as described above or when used as an air purifier, the reason why the air is exhausted from the cold air outlet 6a on the back side is as follows. For example, when the room temperature is relatively low, such as in early spring or early autumn, if unheated air is exhausted from the hot air outlet side, the blown air may make the human body feel cold. Therefore, in such a case, the damper A is operated as shown in FIG. 1(a) to exhaust air through the cold air outlet 6a provided on the back side.

In the above-described embodiment, when the electric heater 14 is energized, the damper 4 is immediately driven to switch the air blowing direction to the hot air outlet 2a side. The air is not heated enough,
Therefore, cold air is blown out from the hot air outlet 2a. Therefore, as shown in FIG.
Analog switch A S + whose opening/closing is controlled by the output of
By providing +, it is preferable to energize the heating wire 17 after a predetermined period of time after energizing the main heater H1.
In this way, the air blowing direction can be switched in a state where the air is sufficiently heated.

Furthermore, when the heating state of the electric heater 14 is stopped, the temperature of the air blown out by preheating of the electric heater 14 gradually decreases, so the damper 4 is rotated slowly in accordance with this timing. The tension between the shape memory spring 8 and the spring 9 may be balanced.

[Effects of the Invention] As described above, the present invention provides a cold air outlet on the back side separately from the hot air outlet provided on the front side, and blows air from the cold air outlet when the air is not heated by the heating means. Since it is equipped with a damper that switches the air blowing direction, the cold air can be exhausted from the back side to prevent the cold air from hitting the user.For example, when the room temperature is relatively low, such as in early spring or early fall. This has the advantage that the air blown out from the outlet does not hit the user and make them feel cold.

Further, the damper has a shape that includes a blower control plate that switches the direction of air circulation between the heating means side and the cold air outlet side, and a heating wire that is tightly wound around the plate to apply rotational force in one direction to the blower control plate. Consisting of a memory alloy spring and a spring that applies rotational force to the blow control plate in the opposite direction to the shape memory alloy spring, the shape memory alloy spring can be heated or unheated depending on whether the air is heated or not. The configuration of the damper can be simplified by controlling the damper to change the balance of the spring forces of the respective springs and rotating the air blowing control plate to switch the air blowing direction.

Furthermore, a delay means is provided for delaying the heating of the heating wire in accordance with the time delay until the air is heated to a predetermined temperature by the heating means, and for delaying the switching of the air blowing direction by the damper to the hot air outlet side. This prevents cold air from being blown out from the hot air outlet before the air is sufficiently warmed.
It becomes a more preferable warm air fan with an air purifying function.

Furthermore, a human body detection sensor that detects the presence of a human body in the room and a temperature sensor that detects the room temperature are installed, and when the human body detection sensor detects the presence of a human body, the operation automatically starts and the room temperature is set to the set temperature. It is advantageous to provide comfortable heating by automatically adjusting the system so as to provide comfortable heating and providing an automatic operation mode that automatically stops operation when a human body is not detected.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are cross-sectional views showing the operating state of a damper, which is a main part of an embodiment of the present invention, Figure 2 is a perspective view of the damper, and Figure 3 is a diagram of a shape memory alloy spring. Explanatory drawings showing the structure; Figures 4 (a) to (d) are front, side, top, and rear views of the warm air fan; Figures 5 (a) and (b) are side views with the - section cut away; 6 is a sectional view showing the structure of the human body sensor portion same as above, FIG. 7 is a circuit diagram same as above, and FIG. 8 is a circuit diagram in the case of delaying the operation of the damper. A is a damper, 2a is a hot air outlet, 4 is a blower control board, 5a
is an air intake port, 6a is a cold air blowout, 0.7 is a human body detection sensor, 8 is a formation memory alloy spring, 9 is a spring, ]0 is a fiber filter, 11 is a deodorizing filter, 14 is an electric heater, 15
A stripping motor, 16 a sirocco fan, 17 a heating wire, 20 a thermistor, T3 a timer circuit, AS, , an analog switch, and SW2 an automatic operation switch. Agent Patent Attorney Ishi 1) Chief Nanashin 1 View Figure 3 Figure 4 (C)

Claims (4)

[Claims] (1) A blowing means for blowing out the air sucked in from the air suction port from a hot air outlet provided at the front, a cleaning means for cleaning the sucked air, and a heating means for heating the air blown out from the hot air outlet. A hot air fan with an air purifying function, comprising: a damper that switches the air blowing direction so that air is blown out from a cold air outlet provided on the back side when the air is not heated by the heating means. (2) The damper is provided with a blower control plate that switches the direction of air circulation between the heating means side and the cold air outlet side, and a heating wire is tightly wound around the damper to apply rotational force in one direction to the blower control plate. Consisting of a shape memory alloy spring and a spring that applies rotational force in the opposite direction to the shape memory alloy spring to the ventilation control plate, the shape memory alloy spring can be heated or unheated depending on whether the air is heated or not. control the state, change the balance of the spring force of each of the above springs and rotate the air blow control plate,
The hot air fan with an air purifying function according to claim 1, characterized in that the air blowing direction is switched. (3) delaying the heating of the heating wire in accordance with the time delay until the air is heated to a predetermined temperature by the heating means;
3. The hot air fan with an air cleaning function according to claim 2, further comprising a delay means for delaying switching of the air blowing direction toward the hot air blowing outlet by the damper. (4) A human body detection sensor that detects the presence of a human body in the room and a temperature sensor that detects the room temperature are installed. When the human body detection sensor detects the presence of a human body, the operation automatically starts and the room temperature is set to the set temperature. 2. The hot-air fan with an air purifying function according to claim 1, further comprising an automatic operation mode that automatically adjusts the air purifying function so that the air purifying function is maintained, and automatically stops the operation when a human body is not detected.