JPH03217757A - Hot air room heater - Google Patents

Abstract

PURPOSE:To prevent deformation, damage or a resin member due to heat if it is used as an air cleaner by providing a filter in a suction port, selecting a forward opening if heating means is operated whereas selecting an upper opening after predetermined time elapses if the operation of the means is stopped. CONSTITUTION:A filter unit 40 is provided in the suction port 11 of a gas hot air room heater 1. When a room heating operation is instructed, a combustion fan 25 is operated, and combustion takes place in a burner 20. A convection fan 15 is driven, the air in a room is circulated, an upper duct 16a at an upper diffuser 13 side is closed by a switching damper 17, and the port 11 is connected to a hot air diffuser 12. In the case of a single purification operation, only the fan 15 is driven, the burner 20 is stopped, the damper 17 is driven, and the air is diffused from the diffuser 13 into a room. In this case, the switching of the duct by the damper 17 is delayed until the temperature of the diffused air is lowered to a level not affecting a resin covering member 14 to protect the member 14.

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a heating means and a blower in a casing,
The present invention relates to a warm air heater that blows air heated by a heating means indoors using a blower.

[Prior Art] In hot air heaters that blow heated air indoors using a blower, in order to improve the indoor temperature distribution, hot air outlets are often provided in the front of the casing of the warm air heater. By blowing heated air forward and circulating indoor air, heating efficiency is improved.

On the other hand, hot air heaters tend to scatter dust and other particles in the room by blowing out air, so in order to adsorb fine particles such as dust in the air being circulated, air passages that circulate indoor air are used, such as air passages that circulate indoor air. Some devices have an activated carbon filter installed in the mouth, etc., to add an air purifying function.

However, some devices can be used independently as air purifiers by making use of this air purifying function by operating a blower to circulate indoor air while the heating means is stopped.

[Problems to be Solved by the Invention] As described above, in a hot-air heater equipped with an air purifying function, it is usually difficult to use it as an air purifier by utilizing only the air purifying function without activating the heating means. However, even in such cases, if the air blown into the room hits the user directly, the user may feel a cold breeze depending on the temperature. There is a problem in that the patient may feel uncomfortable in return.

Additionally, if the device is used alone as an air purifier without activating the heating means, the period of use of the device will no longer be limited to the cold and cold season, so it is desirable to have a design that will not cause discomfort even when installed throughout the year. Although it is conceivable to use a resin member, the vicinity of the air outlet may become distorted or damaged due to heat.

The present invention provides a warm air heater with an air purification function,
When used as an air purifier, in order to reduce the loss of comfort and easily obtain a design that feels less strange, when using resin, the resin parts should not be deformed or damaged by heat. The purpose is to

[Means for Solving the Problems] The present invention provides an air blower, a heating means, and an opening selection means arranged in a floor-standing casing having a suction port, a front opening, and an upper opening that communicate with each other. In a hot air heater that sucks air into the gating from the suction port and blows out air from the front opening or the upper opening selected by the opening selection means, the suction port is provided with an air purifying filter, An air outlet forming member made of resin for forming an air outlet in the upper opening is provided, and the opening selection means selects the front opening when the heating means is activated when the blower is operated, and the opening selection means selects the front opening when the heating means is activated. If the heating means does not operate, select the upper opening, and if the heating means stops operating,
The technical means is to select the upper opening after a predetermined period of time has elapsed after the operation of the heating means has stopped.

[Operation] In the present invention, when the blower operates, air is sucked in through the suction port and blown out through the opening selected by the opening selection means. At this time, the air is purified by the air purifying filter at the suction port.

When only the blower operates and the heating means does not operate, it acts as an air purifier, and purified air is blown out from the upper opening, so the blown air rarely hits the user directly, so they do not notice it. In the meantime, the air is gradually purified.

When the heating means is operated together with the blower, heated air is blown out from the front opening and diffused into the room, stirring the indoor air and improving temperature distribution. When the heating means is in operation and then stopped, the aperture selection means selects the upper opening after a predetermined period of time has elapsed while the operation of the heating means has stopped. Therefore, heated air is not blown out from the upper opening.

[Effects of the Invention] In the present invention, since the upper opening is provided with a resin outlet forming member, any design can be easily set on the upper part of the casing, and its finishing becomes easy.

Therefore, any design can be applied without causing any discomfort even when installed throughout the year.

Further, in the opening selection means, if the heating means is in operation and stops, the upper opening is not selected until a predetermined time has elapsed, so that the heated air does not hit the air outlet forming member of the upper opening. Therefore, it is possible to prevent deformation and damage of the resin outlet forming member.

[Example] Next, the present invention will be explained based on examples.

The gas hot air heater 1 shown in Fig. 1 has been improved so that it can be used as a heating device during cold and cold times such as winter, and as an air purifier when heating is not required. A burner 20 as a heating means is installed in the lower part of the floor-type main body case 10 which is made of sheet metal processed metal members.
are arranged on the surface of the main body case 10, and a suction port 11 through which indoor air is sucked and a hot air outlet 12 through which air heated by the burner 20 is blown out are provided on the surface of the main case 10, respectively.
0, and an upper opening 1 provided on the upper surface of the main body case 10.
A cover member 14 made of resin and provided with an upper outlet 13 from which air is blown out when used as an air cleaner is provided to cover the cover member 2a.

Inside the main body case 10, a convection duct 16 is provided that communicates the inlet 11 and the hot air outlet 12, and forms a fan casing of a once-through convection fan 15 for circulating indoor air. Air is sucked in from the suction port 11 by the operation of the fan 15, and the hot air outlet 12
Bubbling out? Ru.

The convection duct 16 is provided with an upper duct 16a that branches downstream of the impeller 15a of the convection fan 15 in order to communicate with the upper opening 12a. A switching damper 17 is provided for changing the direction and selecting between the hot air outlet 12 and the upper opening 12a.

The switching damper 17 includes a drive motor 1 equipped with a speed reduction mechanism.
7a is provided, and when used as a heating device, the upper duct 16a on the upper outlet 13 side is closed, and when used as an air cleaner, the convection duct 16a on the warm air outlet 12 side is closed.
Close 6.

The burner 20 includes a mixing box 24 equipped with a burner plate 23 made of ceramics at the lower end of a combustion duct 22 that forms a combustion chamber 21, and a burner plate 23 provided around the burner plate 23 in the combustion duct 22. A flame-holding wall 22a is provided to surround the burner 20.
As shown in FIG. 2, a combustion fan 25 is provided for supplying combustion air.

The mixing box 24 is equipped with a substantially conical air supply pipe 26 for controlling the air supplied into the mixing box 24 at a supply port 24a through which fuel gas and combustion air are supplied. In the center part, there is a nozzle 30 that spouts fuel gas.
is arranged at a distance from the air supply pipe 26.

The air supply pipe 26 operates according to the operating state of the combustion fan 25.
The combustion state of the burner 20 can be automatically changed between all primary air combustion and Bunsen combustion. A blower duct 27 for directly supplying air into the combustion chamber is provided, and the combustion duct 22 has a plurality of air supply holes 22b that communicate the combustion chamber 21 and the blower duct 27 in an outer portion corresponding to the flame-holding wall 22a. is formed.

The combustion fan 25 uses a centrifugal blower, and an air supply port 28a is provided below the suction port 11 on the rear surface of the main body case 10 and is communicated with the combustion fan 25 through an air supply duct 28. Note that the air supply port 28a is equipped with a resin filter 29 and resin cotton 29a to filter the air supplied to the mixing box 24.

The combustion duct 22 extends upward from the burner 20, and its upper end is connected to the convection duct 16 upstream of the convection fan 15, and the combustion chamber 21 communicates with the suction port 11.

Upstream of the nozzle 30, a valve mechanism 31 is provided which integrally includes a dual electromagnetic valve and a proportional valve for adjusting the amount of fuel supplied. Gas is supplied.

In the gas hot air heater 1 having the above configuration, the suction port 11 is equipped with a filter unit 40 for removing dust, cigarette smoke, pollen, and other dust from the passing air.

The filter unit 40 is shown in FIG.
It is made slightly smaller than the suction port 11 so that it can be fitted into the suction port 11, and its lower end is rotatably supported by the main body case 10, so that it can swing toward the outside of the main body case 10. ing.

As shown in FIG. 4, the filter unit 40 has a plurality of filter components disposed inside a unit case 41 that is open at the top.The filter components include, in order from the outside, a wire mesh 42, a resin mesh 43, and a main filter. Electrode 44, resin frame 4
5. There are a negative electrode 46 and an activated carbon filter 47. These filter components are fitted into respective fitting grooves 41a and 4lb inside the unit case 41, and the unit case 4
A presser cover 48 is fitted to the upper end of the cover 1.

The wire mesh 42 is a relatively fine mesh placed inside a metal frame, and is used to collect relatively large dust such as cotton dust in the room.The wire mesh 42 has a wire mesh at the upper end for easy cleaning and maintenance during normal use. A take-out portion 42a for pulling up the wire mesh 42 from inside the unit case 41 is formed so as to be bent outward.

In addition, a presser foot lI48 is also provided corresponding to this take-out portion 42a.
A notch 48a is provided to prevent the wire mesh 42 from being covered.
is formed.

The resin net 43 is a protective net to prevent the user from directly touching the positive electrode 44, which will be described later, when the wire net 42 is taken out from the unit case 41, and is designed to prevent the fingers of young people from passing through. It has a certain degree of appearance.

The positive electrode 44 is a discharge electrode that charges dust passing through the filter unit 40 to facilitate adsorption to a negative electrode 46 and an activated carbon filter 47, which will be described later.

The positive electrode 44 is formed by providing a plurality of approximately rectangular openings 44a in a metal plate made of iron or the like whose periphery is bent toward the outside of the main body case 10 into a dish shape. As shown in FIG. 2, a protrusion 44b with a pointed end is formed toward the inside of the opening 44a.

On the other hand, the negative electrode 46 is provided as a part of the dust collection electrode corresponding to the above-mentioned positive electrode 44, and is made of a metal plate made of aluminum or the like. In the left and right direction, the upper bent part 46a is a side bent part 4 which is bent inward of the main body case 10.
6b and 46c are further inserted into the main body case 1 so as to correspond to each opening 44a of the positive electrode 44 and penetrate through the inside of the opening 44a.
Louver portion 46 bent toward the outside of 0
d is provided.

The positive electrode 44 is arranged inside the resin frame 45, and the above-mentioned protective wire mesh 42 is fitted to the resin frame 45, so that the positive electrode 44 is fixed within the resin frame 45.

On the other hand, the negative electrode 46 is provided in the unit case 41 by being fitted into a fitting groove 4lb which is larger than the fitting groove 41a into which the resin frame 45 is fitted, and is insulated from the positive electrode 44 by the resin frame 45. .

As a result, as shown in FIG.
The opening 44a of the positive electrode 44 is located around the louver part 46d, and the positive electrode 44 is arranged perpendicularly to the louver part 46d.Protrusions 44b with pointed ends are provided on both sides of the louver part 46d. Because they are arranged at a predetermined interval,
A DC high voltage (approximately 4,000 kHz is applied between each of these electrodes 44 and 46
When a voltage of 6.0 kV) is applied, passing particles such as dirt and dust are easily charged.

At this time, the negative electrode 46 is positioned by attaching a claw portion (not shown) to a fitting hole (not shown) of the resin frame 45, and an appropriate distance is secured between the negative electrode 46 and the protrusion 44b of the positive electrode 44. .

The activated carbon filter 47 is made by adhering a large number of activated carbon particles to the surface of a filter member 47b exhibiting a honeycomb structure having a large number of through holes 47a with an adhesive, and the filter member 47b itself is provided with conductivity.

In the activated carbon filter 47, a filter member 47b is fixed by a metal filter frame 47c, and a filter member 47b is fixed by a metal filter frame 47c.
A take-out portion 47d is formed at the upper end so that the activated carbon filter 47 can be taken out easily.

The activated carbon filter 47 is fitted between the side bent portions 46b and 46c of the negative electrode 46 within the unit case 41 into which the negative electrode 46 is fitted.

As a result, the activated carbon filter 47 is connected to the negative electrode of a high voltage circuit (not shown) via the negative electrode 46, and each positively charged particle is attracted to the activated carbon filter 47, so that these particles can be easily removed. can be collected.

The main body case 10 is provided with a unit detection switch 49 inside the upper part of the suction port 11 in order to detect that the unit case 41 is attached, and an activated carbon filter 47 is housed in the unit case 41. In order to detect whether or not a filter is being detected, there is a filter detection opening 41c in the center of the lower end of the unit case 41, and a filter detection switch 49a is provided in this opening 41c.

In this gas hot air heater 1 having the above configuration, the indoor air is circulated by the convection fan 15, and the air circulating in the convection duct 16 is heated by the burner 20, and the heating by the burner 20 is performed. There is also a purification operation in which only the convection fan 15 is operated and used as an air purifier without this operation, and each operation is controlled by the control device 50 according to the operating state of the heating switch 51 or the purification switch 52.

The control device 50 mainly includes a microcomputer,
Drive motor 1 for each fan 15, 25 and switching damper 17
7a or each valve of the valve mechanism 31, a high voltage generation circuit that generates a high voltage to improve the adsorption of particles such as dust, cigarette smoke, pollen, etc. by the activated carbon filter 47, etc. Further, a temperature setting device 51a for setting a desired indoor temperature during heating operation, a temperature sensor 53 for detecting the indoor temperature, and an ignition electrode 54 for igniting the burner 20, and a temperature sensor 53 for detecting the indoor temperature are provided.
A thermocouple 55 or the like is provided to detect the ignition of zero. Moreover, in order to change the air volume by the convection fan 15 during purification operation, an air volume setting device 52a is provided for setting the rotation speed of the convection fan 15.

In the control device 50, each functional section of a sequence control section 57, a combustion control section 58, a convection control section 59, and a charging section 60 is configured to perform control according to the operation of the heating switch 51 or the purification switch 52. It is provided.

The sequence control section 57 controls each section in a predetermined order according to the conditions when an operation signal is applied to the purification switch 52 or the heating switch 51.

Particularly here, determination control is performed to confirm the installation of the activated carbon filter 47, and when the purification switch 52 or the heating switch 51 is operated, the unit detection switch 4
9 and the filter detection switch 49a do not close their contacts, no operation is started, and if each of the detection switches 49 and 49a open their contacts during operation, the operation is stopped. In addition, inside the convection duct 16 and inside the combustion duct 22,
Temperature switches that operate when each temperature reaches a predetermined temperature are provided, and a temperature fuse that melts when the temperature reaches a high temperature is provided in the convection duct 16 to prevent clogging of the filter unit 40,
When it is detected that the temperature inside each duct has risen due to the hot air outlet 12 being blocked, the heating operation is stopped.

In addition, a tipping switch is provided inside the main case 10, and if the main case 10 is not properly installed and is tilted, all operations are stopped.

Control operations in each operating state will be explained below.

(1) Heating only operation When the heating switch 51 is operated and heating operation is instructed, the above-mentioned determination control is performed to confirm that the unit is installed, and if the unit is installed correctly, the combustion control unit 58 is controlled to perform a predetermined operation. The ignition of the burner 20 is controlled in sequence, the ignition electrode 54 and the combustion fan 25 are started, and the valve machine 1f is activated.
The burner 20 is ignited by opening each electromagnetic valve and the proportional valve in ll31 to cause the burner 20 to burn.

Further, in response to ignition control of the burner 20, a convection control section 59
The convection fan 15 is driven to circulate indoor air.

At this time, the upper duct 16a on the upper outlet 13 side is closed by the switching damper 17, and the suction inlet 11 and the hot air outlet 12 are communicated with each other.

As a result, the combustion gas of the burner 20 is transferred to the convection fan 15.
The heated air is mixed with the indoor air sucked in by the warm air outlet 12 and blown out from the hot air outlet 12.

When the heating operation is instructed to stop, combustion of the burner 20 is stopped by predetermined fire extinguishing control, and then the convection duct 1
When the temperature inside 6 falls, the convection fan 15 stops.

Note that in the case of heating operation, the convection fan 15 is controlled according to the combustion control state in the combustion control section 58, and does not accept settings by the air volume setting device 52a.

(2) Purification independent operation When the purification switch 52 is operated and purification operation is instructed, the above-mentioned installation confirmation discrimination control is performed, and if there is no abnormality,
Controlling the convection control unit 59 to drive the convection fan 15;
At this time, the convection duct 16 on the hot air outlet 12 side is closed by the switching damper 17, and the suction inlet 11 and the upper outlet 13 are communicated with each other.

Further, the rotation speed of the convection fan 15 is set by the air volume setting device 52a, and the upper air outlet 13 is set at a corresponding air volume.
Air is blown out.

(3) Purification and heating operation When heating switch 51 and purification switch 52 are operated to instruct heating operation and purification operation, purification and heating operation is performed.

At this time, the upper duct 16a on the upper air outlet 13 side is closed by the switching damper 17, and the air inlet 11 and the hot air outlet 12 are closed.
communicate with. Further, in this case, settings by the air volume setting device 52a are not accepted.

(4) Change from heating operation to purification-only operation If heating operation is in progress and the change is made to purification-only operation, combustion of the burner 20 is stopped while only the convection fan 15 is driven, and the switch is made. The damper 17 is driven to close the convection duct 16 on the hot air outlet 12 side, and air is blown into the room from the upper outlet 13.

At this time, even if the combustion of the burner 20 is stopped, the burner 2
Since the temperature at 0 does not drop immediately, if air is blown out from the upper outlet 13 as it is, there is a risk that the cover member 14 forming the upper outlet 13 will be deformed or damaged by the heat. Since the switching of the duct by the switching damper 17 is delayed until a predetermined period of time has elapsed for the temperature of the blown air to drop to a level that does not affect the resin covering member 14, the blown air does not reach the covering member 14. When the air passes through the upper air outlet 13 of 14, the temperature has dropped to a level that does not affect the cover member 14 made of resin, so the cover member 14 can be protected.

(5) Change from purification operation to heating only operation In this case, the purification operation is stopped and the heating operation is started as described above.

In each of the above operations, when the indoor air passes through the suction port 11 due to the operation of the convection fan 15, the high voltage applied between each electrode 44 and 46 of the filter unit 40 causes particles such as cigarette smoke and pollen to The activated carbon filter 47 is charged with a positive charge and connected to the negative electrode 46.
The dust is removed by suction.

As described above, in this embodiment, in the case of purification operation in which heating is not performed by the burner 20, air is blown out from the upper outlet, so that the air is less likely to hit the person directly, giving a feeling of cold air. There is no. Therefore, you can spend your time comfortably without feeling like you are in purifying operation.

Moreover, since the upper opening 12a is covered by the cover member 14, it becomes easy to freely design the upper part of the main body case 10, and the surface finish thereof becomes easy.

Therefore, it is possible to create a design that will not cause discomfort even if it is installed as an air purifier throughout the year, and the manufacturing cost will not increase or the manufacturing process will not be particularly complicated, reducing the manufacturing burden. It can be suppressed. Furthermore, when the heating operation cannot be switched to the purification-only operation, the switching of the switching damper 17 is delayed by a predetermined period of time after the burner 20 stops operating, so that high-temperature air does not pass through the upper outlet 13. , resin cover member 1
4 will not be deformed or damaged.

In the present embodiment, when switching from heating operation to purification-only operation, the operation of the switching damper 17 is delayed for a predetermined period of time by a timer, but the temperature detected by the temperature sensor that detects the air outlet temperature of the front outlet is set to a predetermined time. It is also possible to delay the time until the temperature drops.

In the above embodiment, a gas burner is shown as a heating means, but the fuel for the burner may be petroleum, and the heating source may be an electric heating source other than a burner.

Further, the present invention can also be applied to an FF type heater equipped with a heat exchanger.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a gas hot air heater showing an embodiment of the present invention, FIG. 2 is a cutaway front view of the gas hot air heater, and FIG. 3 is a cross section showing the structure of the filter unit of this embodiment. Figure, 4th
The figure is a diffusion exploded view of the filter unit, and Figure 5 is a front sectional view of the filter unit showing the relationship between the positive and negative electrodes.
FIG. 6 is a functional block diagram for explaining the control device of this embodiment. In the figure, 1... gas hot air heater (warm air heater), 10...
...Body case (casing), 11...Suction port, 1
2... Warm air outlet (front opening). 12a... Upper opening, 13... Upper air outlet, 14... Covering member (air outlet forming member), 15... Convection fan (air blower), 1
7... Switching damper (opening selection means), 20... Burner (heating means), 47... Activated carbon filter (air purification filter).

Claims (1)

[Scope of Claims] 1) A blower, a heating means, and an opening selection means are disposed in a floor-standing casing having a suction port, a front opening, and an upper opening that communicate with each other, and when the blower operates, the air flow from the suction port is disposed. In the hot air heater that sucks air into the casing and blows out air from the front opening or the upper opening selected by the opening selection means, the suction port is provided with an air purifying filter, and the upper opening is provided with an air outlet forming member made of resin for forming an air outlet, and the opening selection means is configured to:
When the heating means is activated, the front opening is selected; when the heating means is not activated, the upper opening is selected; when the heating means stops operating, the heating means is activated. A hot air heater characterized in that the upper opening is selected after a predetermined time has elapsed after stopping.