JPH04268162A - Air cleaner with hot air blowing function - Google Patents

Abstract

PURPOSE:To prevent cold air from striking against a person while air is not heated and to blow air from a front side during summer season. CONSTITUTION:Each of a front surface and a rear surface of an air cleaner is provided with a hot air blowing-out port and a cold air blowing-out port, respectively. When a heater H1 is not heated, air is blown out through the cold air blowing-out port at the rear surface side through a damper. With such an arrangement, cold air is blown out of the hot air blowing-out port when non heated and then the cold air is prevented from being struck against a person. When heated, a heating wire 17 is electrically energized to drive the damper and then air is blown out of the hot air blowing-out port at the front surface side. During a hot summer season showing a high air temperature, the heating wire 17 is electrically energized with an output from a comparator CP3, the damper is driven and then an air blowing direction is set to a hot air blowing port 2a.

Description

[Detailed description of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air blowing control method for an air cleaner with a warm air function.

[Prior Art] Some conventional air purifiers have a warm air function that heats the air in addition to the air purifying function, and some air purifiers can be used effectively even in winter. .

[Problem to be Solved by the Invention] However, in the above-mentioned air purifier with a hot air function (especially for home use), when the room temperature is relatively low, such as in early spring or early autumn, the hot air outlet provided in the front is If unheated air is blown out from the device, there is a problem in that the air hits the user and makes them feel cold. Therefore, it is possible to install the air outlet on the back side, but this will reduce the effectiveness of heating the room with hot air, and in summer, the hot air outlet on the front side (of course,
In this case, it is preferable to blow the air out from the air (without heating the air). The present invention has been made in view of the above points, and its purpose is to be able to switch the hot air blowing direction between the front and back sides depending on the heating state of the air when the temperature is low. To provide an air cleaner with a hot air function capable of blowing air from the front in summer.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a blowing means for blowing air sucked in from an air suction port through a hot air outlet provided in the front, and purifies the sucked air. a cleaning means; a heating means for heating the air blown out from the hot air outlet; and a heating means for heating the air from the hot air outlet when the heating means heats the air; and an air blowing control means for switching the air blowing direction so that the air is blown out from a warm air blowing port provided on the front surface when the ambient temperature is higher than a predetermined temperature.

[Operation] By configuring the present invention as described above,
When the air is not heated, the air is directed to the cold air outlet provided on the back side using the air blower control means, and when the room temperature is relatively low, such as in early spring or early autumn, the air is not heated from the hot air outlet. This prevents air from blowing out and hitting the user and making them feel cold, and when the temperature is high such as in the summer, the air is blown out from the front so that the user can feel the coldness. It is designed to actively apply energy to the air, allowing it to perform almost the same function as a blower.

Embodiment FIGS. 1 to 12 show an embodiment of the invention. As shown in the front view of FIG. 2, the air purifier of this embodiment is of a stationary type, and is equipped with a base 3 at the bottom, on which openings 5b and 5c for circulating air are formed in two upper and lower locations. (see FIG. 7), and as shown in FIG. 3, attach the upper cover 1 to the upper front of the body 5, and attach the lower cover 2 in which the hot air outlet 2a is formed to the lower front of the body 5, as shown in FIG. It has a structure in which a housing 6 is attached to the back of a body 5. Note that a handle portion 6b is recessed in the upper part of the housing 6 as shown in FIG. 5, and the air purifier can be carried using the handle portion 6b. As shown in FIG. 7, a shade removing motor 15 and a sirocco fan 16 are installed in an opening 5b provided in a portion corresponding to the upper cover 1 of the body 5.
Air is sucked in from air suction ports 5a (see FIG. 6) formed on both sides of the body 5 corresponding to the air blowing means, and sent downward. Here, a fiber filter 10 and a deodorizing filter 1 are provided on the back side of the upper cover 1, which becomes a flow path for the air sucked in from the air suction port 5a.
A cleaning means consisting of a fiber filter 10 is provided to filter dirty air, and a 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 fittings 12 and 13, and the electric heater 14 is used as a heating means to receive hot air from a sirocco fan 16. Heating the air with an electric heater 14,
The warm air is blown out from the hot air outlet 2a through the punching net 18 arranged at the front. As shown in FIG. 8, a cold air outlet 6a for blowing out cold air is provided at the lower part of the housing 6 corresponding to the hot air outlet 2a. A damper A is provided as a blowing control means for switching the blowing direction. As shown in FIG. 11, 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 airflow control plate 4 and rotates in one direction. It is composed of a shape memory alloy spring 8 that applies power to the air blow control plate 4, and a spring 9 that applies rotational force to the air blow control plate 4 in a direction opposite to that of the shape memory alloy spring 8. The ventilation control board 4 is formed by bending a flat plate into a dogleg shape in cross section.
The rotating shaft 4a protruding from both side edges is connected to the electric heater 14.
It is rotatably supported by a pair of mounting pieces 13a protruding from the back side of both sides of a rectangular frame-shaped fixture 13 on the back side to which the mounting bracket 13 is attached. The shape memory alloy spring 8 is made of Ti-Ni alloy, etc.
As shown in FIG. 10, insulated terminals 8a are attached to both ends. Here, both ends of the shape memory alloy spring 8 are insulated terminals 8a.
It is adhesively fixed to the insulating terminal 8a through round holes 8b formed at two locations. The heating wire (Kanthal wire) 17 tightly wound around the formation memory alloy spring 8 is
The shape memory alloy spring 8 is heated, and the shape memory alloy spring 8 is contracted and expanded by this heating. The shape memory alloy spring 8 of this embodiment is designed to contract into a shape memory state when heated. The heating wire 17 is this heating wire 17
A round crimp terminal 1 is attached at both ends along with a lead wire 18 that conducts electricity.
9 is caulked and fixed. The insulated terminal 8a on one end side of the spring 8 is attached to the air blow control board 4 together with the round crimp terminal 19.
A pair of fixing pieces 4 protruding from one side of the lower surface of 1
The insulated terminal 8a on the other end is connected to one mounting piece 13a of the fixture 13 together with the round crimp terminal 19.
It is rotatably fixed to a fixed piece 13b protruding from one end side. 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 a hook piece 13c protruding from the other end side of the other attachment piece 13a of the fixture 13, by hooking both ends thereof. 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. As shown in FIGS. 8 and 9, the air blow control plate 4 is rotated to change the air blowing direction. The air purifier 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. 2 or 12, a human body detection sensor 7 is provided. The human body detection sensor 7 may be of any type, such as an ultrasonic type or a hot wire type. Here, the automatic operation switch SW2 to set this automatic operation mode is arranged on the top surface of the body 5 as shown in FIG. Operation switch SW3
, Temperature setting switch S that allows you to set the temperature up and down in 5 steps.
W4, SW5 and a heating cut-off switch SW6 are provided. In addition, the automatic operation switch SW2, the continuous operation switch SW3, and the heating cut-off switch SW6 are provided with display lamps L1, L2, and L8 that display the operation status, respectively, and the temperature setting switches SW4 and SW5 have five setting statuses. Display lamps L3 to L7
is provided. In addition, the temperature setting switch SW4,
In order to maintain the room temperature at the set temperature of SW5, the air cleaner of this embodiment is equipped with a thermistor 20 as a temperature sensor that detects the indoor temperature. This thermistor 20 is arranged inside the housing 6, and an air intake hole 6 is provided in the part of the housing 6 where the thermistor 20 is arranged so that the room temperature can be easily detected.
c (Fig. 5). FIG. 1 shows the internal circuit of the air cleaner of this embodiment. The internal circuit of this embodiment can be roughly divided into a mode setting section 21 for setting the operation mode, a temperature setting section 22 for setting the room temperature, a motor drive control section 23 for driving the motor 15, and a control section for controlling the electric heater 14. It consists of a temperature adjustment section 24 that controls the operation so that the room temperature reaches a set temperature, and a heating off setting section 25 that sets the heating off state. The mode setting section 21 switches the operations of the above-mentioned sections between an automatic operation mode and a continuous operation mode in accordance with the operation of the power on/off switch SW1, the automatic operation switch SW2, and the continuous operation switch SW3. The temperature setting section 22 is
The set temperature can be set in stages by operating the temperature setting switches SW4 and SW5, but when switching to automatic operation mode, it is always initially set to the medium temperature state (intermediate switching state of the third stage). It's like this. 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. Main heater H1
If the room temperature is considerably lower than the set temperature, the auxiliary heater H2 is also heated to rapidly bring the set temperature to the set temperature. The operation of the internal circuit will be explained below. First, when the power on/off switch SW1 is turned on, the output Q1 of the flip-flop FF1 becomes "H".
At this time, since the flip-flop FF3 is in the reset state, the flip-flop FF2 is set through the analog switch AS1, thereby entering the automatic operation mode. At this time, the automatic operation indicator lamp L1 is lit by the output of the flip-flop FF2. Also,
When the power on/off switch SW1 is turned on, both inputs of the AND gate AND1 become "H", so the temperature setting section 22 is initialized by the "H" output at this time. That is, the flip-flops FF4 to FF6 are each set by the output of the AND gate AND1, and are initially set to a medium temperature state. At this time, the temperature display lamps L3 to L5 are turned on by the outputs of the flip-flops FF4 to FF6. In this way, when the outputs of the flip-flops FF4 to FF6 become "H", the analog switches AS3 to AS10, the AND gates AND12 to AND15, and the inverter gate I1, which are provided after the flip-flops FF4 to FF8, are activated.
.about.I4, only the output of the flip-flop FF6 is connected to the resistor voltage divider circuits 271 and 272.
is applied to the resistor voltage divider circuit 271, 2.
The reference voltage determined by 72, that is, the reference voltage for medium temperature setting, is applied to the comparators CP1 and CP2 of the temperature adjustment section 24.
given to. Here, if you want to raise the set temperature, just press switch SW4. If you press switch SW4 once in the initial setting state described above, the output of flip-flop FF6 is "H", so
The output of the AND gate AND7 becomes "H" when the switch SW4 is pressed, thereby setting the flip-flop FF7 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. Conversely, if you want to lower the set temperature, just press switch SW5.
If switch SW5 is pressed twice, AND gate A
The output of ND6 becomes "H", the flip-flop FF6 is reset, and the set temperature is lowered by one step. Similarly, each time switch SW5 is pressed, the set temperature is increased by 1.
You can lower it step by step. However, only the flip-flop FF4, which sets the minimum temperature setting state, cannot be reset, and this minimum temperature setting state is reset only when the heating is turned off, which will be described later. In this automatic operation mode, if the human body detection sensor 7 detects the presence of a human body in the room, the output of the AND gate AND10 of the motor drive control section 23 becomes "H", and the timer T2 (for example, the time limit (set to 10 minutes) starts time-limited operation, and at this time timer T2
The output makes the phototriac PT1 conductive and drives the motor 15. Note that this driving state of the motor 15 continues until the expiration of the time limit operation time of the timer T2 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 CP1 of the temperature adjustment section 24, and if the room temperature is lower than the set temperature, the output of the comparator CP1 becomes "H". ”, and the timer T1 (for example, the time limit is set to 1 minute) starts a time limit operation. As a result, photocoupler PC1 becomes conductive, and relay Ry1
is driven and the contact r1 closes, the main heater H1 is energized and the electric heater 14 starts heating the air. Note that when the timer T1 starts the time-limited operation as described above, the photocoupler PC3 is made conductive by the output via the OR gate OR1, and the heating wire 17 is also energized, so that the shape memory alloy spring 8 contracts and the damper A operates in the state shown in FIG. 9, whereby air from the sirocco fan 16 is sent to the electric heater 14. In addition, when the output of the comparator CP1 is "H" as described above, the thermistor 20 is also connected to the comparator CP2.
The output detected by CP2 is input to this comparator CP2.
(The reference voltage of comparator CP2 is set lower than the reference voltage of comparator CP1), when the room temperature is lower than the reference voltage of comparator CP2, the AND gate AND16
The output of “H” becomes “H”, which causes the photocoupler PC
2 becomes conductive and the relay Ry2 is driven, the auxiliary heater H2 of the electric heater 14 is heated, and the electric heater 14 is operated so as to rapidly raise the temperature to the set 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 CP2 becomes "L", and the heating of the main heater H1 is also stopped after the time limit operation time of the timer T1 has elapsed, thereby controlling the heating and non-heating states of the main heater H1. Repeat this to keep the room temperature constant according to the set temperature. next,
The case of continuous operation will be explained. For continuous operation, press continuous operation switch SW3. However, each of the switches SW2 to SW6 is connected to a power source via an analog switch AS2, so that the switches SW2 to SW6 do not operate unless the power on/off switch SW1 is turned on. When the continuous operation switch SW3 is pressed as described above, the flip-flop FF3 is set, and its output resets the flip-flop FF2, cancels the automatic operation mode and sets the continuous operation mode, and flip-flop FF3 is reset.
The output Q lights up the indicator lamp L2 for continuous operation. In this continuous operation mode, the flip-flop FF
The motor 15 is driven with an output of 3. Further, the operation of the electric heater 14 is controlled by a timer T1 using an AND gate AND11.
This is done by ANDing the output of the comparator CP1, that is, the heating control of the main heater H1 is performed when the air cleaner is operated and the room temperature is below a predetermined temperature. Note that 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 above-mentioned automatic operation mode or continuous operation mode, you can press the heating cut-off switch SW6. When this heating off switch SW6 is pressed, flip-flop FF9 is set and heating off indicator lamp L8
lights up, analog switch AS13 is turned off, power supply to relays Ry1 and Ry2 is cut off, power supply to heaters H1 and H2 is stopped, and heating of the air is stopped. In addition, the output of flip-flop FF9 at this time causes flip-flops FF4 to FF
8 to cancel 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 either temperature setting switch SW4 or SW5, and the output of AND gate AND2 becomes "H".
As a result, the flip-flop FF6 is reset, and the temperature setting unit 22 is set to a medium temperature state, which is the initial setting temperature, in the same manner as when the power on/off switch SW1 is turned on. As described above, when the damper A is driven at the same time as the heater H1 is heated, air can be drawn out from the cold air outlet 6a on the back side when the air is not heated, and the room temperature is relatively low, for example, in early spring or early autumn. Sometimes, unheated air is drawn out from the hot air outlet side, and the blown air can prevent the human body from feeling cold. By the way, in the above case, when the air is not heated, the air blowing direction is set to the cold air outlet 6a side, but when the temperature is high like in summer, it is better to blow the air from the front warm air outlet 2a. preferable. Therefore, in this embodiment, a comparator CP3 is provided to compare the temperature detected by the thermistor 20 with a reference value corresponding to a predetermined temperature (for example, 27°C), and when the temperature exceeds the set temperature, the heating wire 17 is energized. Thereby, air can be blown out from the hot air outlet 2a even in summer. If you do this,
The air purifier can be used as a blower. By the way, in the case of the above-mentioned embodiment, the blowing direction of the air was changed depending on whether the air was heated or not, and the air was prevented from hitting people when the room temperature was relatively low. , the method shown in FIG. 13 may be used as an alternative method to the above case. In the case of this figure 13, the above figure 1
is set by the output of the AND gate AND11 in
A flip-flop FF10 that is reset by the output of the AND gate AND16 is provided, and this flip-flop FF
A photocoupler PC4 that conducts when the output Q of No. 10 is at a high level and a photocoupler PC5 that conducts when it is at a low level are provided, and the contact r3 of the relay Ry3 that is driven when the photocoupler PC4 is conductive is provided. A relay Ry4 is inserted in series with the motor 15 via a resistor R1 and is activated when the photocoupler PC5 becomes conductive.
The contact r4 is connected to both ends of the series circuit of the resistor R1 and the contact r3. In the case of FIG. 13, if the room temperature detected by the thermistor 20 is below the predetermined temperature set in the comparator CP2, the AND gate AN
When the output of D11 becomes high level, flip-flop FF10 becomes set state, and photocoupler P
C4 becomes conductive and relay Ry3 is driven. At this time, a resistor R1 is connected in series to the motor 15, the motor 15 rotates at a low speed, and the amount of air blown is controlled to be small. Therefore, even if the air blown out is cold, the possibility that the blown air will hit a person can be reduced, and even if it does hit a person, the person will not feel cold. Then, when the room temperature reaches the temperature determined by comparator CP2,
Flip-flop FF10 is reset, photocoupler PC5 becomes conductive, relay Ry4 is driven, and the power supply voltage is directly applied to motor 15. Therefore, the rotation speed of the motor 15 becomes high, and the amount of hot air blown can be increased. At this time, the air is heated to a certain extent, so even if the amount of air is increased, people will not feel cold. FIG. 14 shows another method for preventing the blown wind from hitting people when the room temperature is relatively low. In this embodiment, a photocoupler PC1 is used to control the heating of the heater H1. heating wire 17
The heating wire 17 is controlled according to the room temperature.
When the room temperature is low, the damper A reduces the amount of air blown from the hot air outlet 2a by varying the amount of electricity supplied to the warm air outlet 2a. Therefore, in this embodiment, the photocoupler PC1
resistor R2 connected in series with relay Ry1 to
The on/off of analog switches AS14 and AS15 inserted between both ends of the heating wire 17 and the heating wire 17 is controlled by the output of an AND gate AND16, and when the room temperature is low, the amount of current applied to the heating wire 17 is reduced. The amount of rotation of a damper A when the room temperature is low is reduced to reduce the amount of air blown out from a hot air outlet 2a. When the room temperature reaches the temperature determined by the comparator CP2, the amount of current applied to the heating wire 17 is increased to completely rotate the damper A, thereby blowing out all the air from the hot air outlet 2a. Even in this case, the same effect as when changing the rotation speed of the motor 15 as described above can be obtained. Although FIGS. 13 and 14 do not show a circuit for blowing air out from the hot air outlet 2a in summer, it is possible to provide this circuit in each circuit. Further, in the above case, the case where the variable speed is varied in two steps is shown, but it goes without saying that the setting may be set in three steps or more.

Effects of the Invention As described above, the present invention includes a blower means for blowing air sucked in from an 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 to be blown out; and a heating means for blowing out the air from a hot air outlet when the air is heated by the heating means, and blowing out the air from a cold air outlet provided at the back when the air is not heated; The device is equipped with a blower control means that switches the air blowing direction so that the air is blown out from the hot air outlet provided at the front when the temperature is above a predetermined temperature. Therefore, when the room temperature is relatively low, such as in early spring or early autumn, unheated air is blown out from the warm air outlet, and that wind hits the user. , it can prevent the user from feeling cold, and when the temperature is high, such as in the summer, it blows air out from the front and actively hits the user with the air, which has almost the same function as a blower. There are benefits that can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2 is a front view of the air cleaner.

FIG. 3 is a side view of the same as above.

FIG. 4 is a top view of the same as above.

FIG. 5 is a rear view of the same as above.

FIG. 6 is a partially cutaway side view of the same as above.

FIG. 7 is a sectional view of the same as above.

FIG. 8 is a sectional view showing a state in which the same damper as above is operated to blow out air from the cold air outlet.

FIG. 9 is a sectional view showing a state in which the same damper as above is operated to blow out air from the hot air outlet.

FIG. 10 is an explanatory diagram showing the structure of a shape memory alloy spring.

FIG. 11 is a perspective view showing a damper.

FIG. 12 is a partial cross-sectional view showing the structure of the human body sensor section.

FIG. 13 is a circuit diagram of another embodiment.

FIG. 14 is a circuit diagram of still another embodiment.

[Explanation of symbols]

A Damper 2a Hot air outlet 5a Air intake port 6a　Cold air outlet 10 Fiber filter 14 Electric heater 16 Scirocco fan

Claims (1)

[Claims] Claim 1: A blowing means for blowing air sucked in from an air suction port from a hot air outlet provided at the front, a cleaning means for cleaning the sucked air, and a heating device for heating the air blown out from the hot air outlet. means for blowing air out from a hot air outlet when the air is heated by the heating means, blowing out air from a cold air outlet provided on the back side when the air is not heated, and blowing air out from the front side when the ambient temperature is higher than a predetermined temperature. An air purifier with a hot air function, comprising an air blowing control means that switches the air blowing direction so that air is blown out from a hot air blowing port provided.