JPH0648116B2 - Hot air heating system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a warm-air heating device that is provided with a front air outlet and an upper air outlet and is improved so that these air outlets can be selectively opened and closed.

[Prior Art and Its Problems] In a warm air heater, an air outlet is formed in the front surface of a main body case, and hot air from a heat source is forcibly supplied as warm air from a front air outlet to a room by a blower. It has become so.

In this case, cold air comes out from the air outlet at the early stage of ignition and / or the early stage of extinguishing, which causes discomfort. This is because the relationship between the start and / or stop of the blower and the internal heat may not be accurately captured by the heat-sensitive sensor.

[Object of the Invention] The present invention has been made in consideration of the above circumstances, and an object thereof is that a front air outlet and an upper air outlet can be selectively opened / closed and switched so that cold air is not exposed. Another object of the present invention is to provide a hot-air type heating device having the above effect.

[Means for Solving the Problem] The present invention provides a front air outlet provided on a front surface of a device body, an upper air outlet provided on an upper surface of the body, an air blower provided in the body, A hot air type having a heat source for turning the wind from the front blower outlet by the blower into warm air, a switching unit for switching between the front blower outlet and the upper blower outlet, and a control unit for controlling the blower, the heat source, and the switching unit. In the heating device, the control means switches the air blown by the blower between the upper air outlets with the operation start operation of the hot air heating device, and the temperature of the air blown out from the upper air outlet is a predetermined temperature. In this case, the front air outlet is opened instead of the upper air outlet, and the wind from the blower is switched to the upper air outlet by the switching means when the operation is stopped.

[Operation and Effect of the Invention] According to the present invention configured as described above, since the front air outlet and the upper air outlet are switched, the operation is started earlier than the ignition of the heat source, or at the same time as the ignition. The blower is operated with a slight delay, and the upper outlet is open when the wind is still cold, or the direction of the outlet is switched to the upper outlet. As a result, the wind is discharged into the room from the upper outlet, so that it is not exposed to the low temperature wind which may be uncomfortable for some people. Further, the blower continues to operate in order to release the heat remaining after the heat source is stopped, but in this case as well, the blower is switched to the upper air outlet together with the heat source stop or before the sensor detects cold air. As a result, the feeling of cold wind after the heat source is stopped is not received.

[Embodiment] Next, a first embodiment in which the present invention is applied to a gas warm air type heating device will be described with reference to FIGS. 1 to 5.

First, in FIGS. 1 to 3, reference numeral 1 denotes a flat box-shaped main body case in which a duct 2 having an open upper end is arranged. Reference numeral 3 denotes an intake grill formed on the back surface of the main body case 1, 4 and 5 denote upper and front air outlets which are adjacent to each other on the upper end surface and the upper front surface of the main body case 1, and 6b denotes these grills 3, This is an air passage for communicating the upper outlet 4 and the front outlet 5 with each other. Reference numeral 6 denotes a box body disposed in the duct 2, the inside of which is a mixing chamber 6a, and a porous ceramic burner plate 7 is attached to the upper end opening portion thereof. Reference numeral 8 is a guide wall installed so as to surround the upper side of the ceramic burner plate 7. Reference numeral 9 is a guide duct provided between the guide wall 8 and the duct 2 and having a hole 9a for inflowing secondary air on the outer surface thereof. Is. A combustion blower 10 is composed of a scroll casing 11 and a fan 13 driven by a motor 12. In this combustion blower 10, the scroll casing 11
Connects a bell mouth (not shown) to the outside air and connects a discharge port (not shown) to the inside of the mixing chamber 6a. 14 is a nozzle, which the injection side is connected to the mixing chamber 6a through the trumpet-shaped guide tube 15, together with the other end through the proportional valve P _H in the middle, a fuel gas source via a supply pipe 16 (Not shown).

Now, 17 is a cross-flow fan of the convection blower 18, which is arranged horizontally in the hot air passage 6b and is driven by the motor 19. Reference numeral 20 denotes a horizontal rotation shaft of the switching mechanism, which is rotatably supported in the main body case 1 at a corner position between the upper outlet 4 and the front outlet 5. Reference numeral 21 denotes a damper formed of an elastic member such as a metal in a thin and slender rectangular shape. This damper is connected to the upper air outlet 4 according to the room temperature by a warm air temperature or a timer, by interlocking means, or by a room temperature detection unit Rt. The front air outlet 5 is selectively opened and closed, the upper side is fixed to the rotating shaft 20, and the fin 21a is integrally formed on the lower side. A gad motor 22 is arranged in parallel with the damper 21, which has a built-in reduction mechanism as is well known, and the output shaft 23 is provided so as to protrude to the outside through this reduction mechanism. One end of a first link 24 is fixed to the output shaft 23, and one end of a second link 25 is rotatably supported at the other end of the link 24. The second link 25 is formed by a leaf spring so as to have a wavy center portion, and elastically expands and contracts in the longitudinal direction to perform a shock absorbing action of the damper 21 at the time of switching the air outlet, and to alternate the air outlet. It makes elastic contact with and closes tightly. 26 is the third
One end of the link is fixed to the rotary shaft 20, and the other end is rotatably supported by the end of the second link 25. As shown in FIG. 4, the second link 25 has a magnet 2
7 is fixed, and the magnet 27 faces the reed switch 28 that functions as the switching end detecting portion 37 as described later when the front air outlet 5 is closed by the damper 21. At the time of forward blowing, the damper 21 separates the fin portion 21a from the front end b of the air passage 6b and elastically contacts the rear end a to close the upper blow outlet 4 as shown by the solid line in FIG. 1 and FIG. Exit 5 is open. On the burner plate 7, a thermocouple 29 for flame detection and a spark electrode 3 for ignition.
0s are arranged in a facing state.

Next, the operation of the above configuration will be described with reference to the block diagram of FIG. 5 showing the control means. When the operation start switch St is operated, the upper outlet confirmation circuit Cf confirms whether or not the upper outlet 4 is open. When the upper outlet 4 is opened, the combustion blower 10 is driven, the fan 13 rotates, and the outside air is supplied from the scroll casing 11 into the mixing chamber 6a. Then, the gas amount commensurate with this intake air amount is selected so as to be a good value for ignition.

Then, the amount of gas commensurate with the amount of intake air supply pipe 16 from a gas source, the proportional valve P _H, the fuel gas through the nozzle 14 and the guide pipe 15 in this order is injected into the mixing chamber 6a. As a result, mixed gas is generated in the mixing chamber 6a, and the burner plate 7
When it passes through from above to above, it is ignited by the spark electrode 30 and a flame is generated. As a result, an output is generated from the thermocouple 29 and the combustion blower 10 can be controlled. Here the proportional valve P _H by setting value and room temperature detecting portion Rt by the temperature adjusting means 31 is opening control, an appropriate amount through the combustion air also blower 10 by the output from the thermocouple 29 is supplied.

At this time, the cross-flow fan 17 of the convection blower 18 is also rotating according to the amount of combustion through the central processing unit 33 by the output from the thermocouple 29, whereby the outside air is taken into the inside of the grill 3 and the air passage An airflow that escapes from the upper outlet 4 to the outside via 6b is generated. The hot air generated on the burner plate 7 by being multiplied by this airflow is discharged as wind from the upper outlet 4 to the upper part of the room through the air passage 6b. This wind has a relatively low temperature at the initial stage of discharge.

However, since this low-temperature air is blown out from the upper air outlet 4, there is no feeling of cold air, which is convenient. Then, when the temperature of the wind rises and becomes warm air of a predetermined temperature, the blown-air temperature detection unit Dt sends a signal to the central processing unit 33, and the front blower outlet instead of the upper blower outlet 4 as described below. Switch to open 5.

In this case, the delay timer may be switched to open the front air outlet 5 after a lapse of a time such that cool air is not felt.

That is, the operation stop detection unit Pf causes the gad motor forward / reverse rotation selection circuit 3 to operate based on the signal sent to the central processing unit 33.
The reverse rotation energizing circuit 41 is selected via 5 and the gad motor 2 is selected.
Rotate 2 in reverse. With the reverse rotation of the gad motor 22, the first link 24 rotates in the direction opposite to the arrow A of FIG. 2 and is displaced from the position indicated by the alternate long and short dash line to the position indicated by the solid line, and the second and third links 25, 26 is also rotationally displaced in the direction opposite to the arrows B and C, and returns from the position indicated by the alternate long and short dash line to the position indicated by the solid line.
At the same time, the damper 21 reversely rotates together with the rotary shaft 20 from the position indicated by the alternate long and short dash line by an angle of about 60 to separate the fin portion 21a from the front end b of the air passage 6b to the rear end a. Make a bullet contact. As a result, the damper 21 closes the upper outlet 4 and opens the front outlet 5 to let warm air flow in the front outlet 5.
Supplied indoors. At this time, the magnet 27 of the second link 25 causes the reed switch 2 to move due to the rotational displacement of the damper 21.
8, the magnetic force spreads out of the magnetic field, the reed switch 28 is opened, and the switching of the outlets is detected by the switching end detection unit 37. As a result, the power supply to the gad motor 22 is cut off and the gad motor 22 is stopped.

When the room temperature rises above a predetermined level due to use, the room temperature detector Rt detects this rise and sends a detection signal to the central processing unit 33. The central processing unit 33 selects the normal rotation energization circuit 36 via the gad motor normal / reverse rotation selection circuit 35 to rotate the gad motor 22 in the normal direction. Then, the first link 24 rotates by an angle of approximately 60 degrees from the position indicated by the solid line in FIG. 2 to the position indicated by the alternate long and short dash line in the direction of arrow A, and accordingly, the second link 25 and the third link 26 are respectively rotated. Arrow B,
Rotate in the C direction to occupy the position of the alternate long and short dash line. As a result, the damper 21 rotates in the direction of arrow C together with the rotating shaft 20, the fin portion 21a separates from the rear end a and elastically contacts the front end b of the air passage 6b, and the upper outlet 4 instead of the front outlet 5. Is opened and the air outlet is switched.

At this time, since the magnet 27 faces the reed switch 28 as the second link 25 is displaced from the solid line to the position indicated by the alternate long and short dash line, the switch 28 is closed and the switching end detection unit 37 switches the air outlet. Is detected. By the detection of the switching end detection unit 37, the central processing unit 33 increases the energization amount to the motor 19 via the rotation speed control circuit 39 to increase the rotation speed of the cross flow fan 17 to blow the air flow from the convection blower 18 forward. The air volume from the outlet 5 is increased. As a result, a large amount of airflow is generated from the upper outlet 4, and the air in the room is forced to convect vertically.

That is, specifically, the burner combustion amount is set to 900 Kcal / h to 3000 Kcal / h, and the air flow rate is set to 500 rpm to 700 rpm in proportion to this. The burner burns 900 Kcal / h or 3000 Kca during upward blowing.
The air volume was set to be equal to l / h, and the air flow rate was equivalent to the rotation speed of the blower at 800 rpm. As a result, the burner combustion amount was also made variable by the room temperature detection unit Rt.

This convection makes the temperature distribution in the room uniform. again,
When the room temperature detection unit Rt detects that the room temperature is lower than the set temperature, a signal is sent to the central processing unit 33, and the central processing unit 33 sends the detection signal from the thermocouple output detection unit 32 to the rotation speed control circuit 39. Motor 1 of blower 18 for blower and convection
It works so as to reduce the energization amount to 9 to a value corresponding to the driving state of the combustion blower 10 (500 rpm to 700 rpm as described above), and to reduce the rotation speed of the convection blower 18. The rotation speed control detection circuit 42 detects a decrease in the amount of electricity supplied to the motor 19 by the rotation speed control circuit 39 and sends a signal to the central processing unit 33. Then, the gad motor forward / reverse rotation selection circuit 35 reversely rotates the gad motor 22 via the reverse rotation energization circuit 41 after the detection by the rotation speed control detection circuit 42.

With the reverse rotation of the gad motor 22, the damper 21 reversely rotates together with the rotary shaft 20 from the position indicated by the alternate long and short dash line by an angle of about 60, and elastically contacts the rear end a of the air passage 6b as indicated by the solid line. As a result, the damper 21 closes the upper outlet 4 and opens the front outlet 5 to switch the outlet direction, and warm air is supplied from the front outlet 5 into the room.

At this time also, similarly, the magnet 27 of the second link 25
Is separated from the reed switch 28 and deviates from the magnetic force spillover range, the reed switch 28 is opened, and switching of the air outlet is detected by the switching end detection unit 37. As a result, the power supply to the gad motor 22 is cut off and the gad motor 22 is stopped.

As described above, since the front air outlet 5 is switched to the upper air outlet 4 according to the rise in the room temperature, the up-down flow can be promoted by the agitation of the room air, and the temperature distribution can be made more uniform. Urge.

Further, when it is desired to stop the heating operation, the operation stop switch Sp is operated. Then, the gas supply from the gas source is cut off and the flame on the burner plate 7 is extinguished. Motor 19
Does not stop at the same time as the heat source stops, but discharges residual heat and then is cut off by electricity.

At this time, a timer or a bimetal switch was used to set the energization time to the blower, and the energization to the blower was cut off as the temperature of the residual heat decreased. However, in bimetal, although the temperature of the wind and the stop of the blower correspond to each other, the temperature of the blower is often lengthened in order to ensure sufficient heat release regardless of whether the bimetal or the timer is used. It may cause discomfort due to direct exposure to low winds.

Therefore, since the blower continues to rotate even after the heat source is stopped and the wind becomes low in temperature, the air passage is switched to the upper outlet 4 by the switching means. This is because the blowout air temperature detector Dt detects the blowout air temperature, or after the heat source is extinguished, the central processing unit 3
It may be switched by the timer in 3, but in any case, it is switched before the temperature becomes sensationally low. Further, the stop signal may be input to the gad motor by the central processing unit 33 in accordance with the stop of the heat source to switch the air outlet.

As a result, the wind is discharged from the upper outlet 4, so that the wind having a low temperature is not directly exposed and no discomfort is caused.

At this time, it is convenient that the residual heat can be quickly released by increasing the air volume of the blower at the same time as switching to the upper outlet 4.

In the above embodiment, when the operation start switch St was operated, it was confirmed by the upper outlet confirmation circuit Cf that the upper outlet 4 was in the open state, but for some reason, the upper outlet 4 was opened. When the is closed, it is possible to prevent ignition operations on the burner to avoid malfunctions. Further, in this case, the damper may be switched to open the upper outlet.

Further, in the above embodiment, the motor may be energized to drive the blower prior to ignition of the heat source, that is, the burner with the start of operation.

Further, when the upper air outlet 4 is closed and the front air outlet 5 is opened at the start of the operation, switching is performed so that the upper air outlet 4 is opened from the front air outlet 5 with the start operation. May be.

Next, FIGS. 6 to 9 show other embodiments of the present invention. In FIG. 6, a turbo fan or a sirocco fan is used for the fan 13 of the combustion blower 10 in FIG. 2 to achieve high rotation speed, and a large-scale cross-flow fan 17 is applied to the convection blower 18 to blow air. It is possible to make the whole compact while raising the.

Further, in FIGS. 7 to 9, instead of the large-sized cross-flow fan 17 of FIG. 6, cross-flow fans 60 and 61 are provided in upper and lower two stages, and the upper-stage cross-flow fan 60 is dedicated to upward blowing, and the lower-stage cross-flow fan is dedicated. The fan 61 has a function of performing auxiliary suction of the primary air for combustion and guiding the warm air to the front air outlet 5.

In the case of the embodiments of FIGS. 6 to 9, the same members as those of the embodiments of FIGS. 1 to 5 are designated by the same reference numerals, and only different portions will be described.

In place of the damper 21 of the above embodiment, a damper 70 is provided with a flat portion 70a as shown in FIG.
You may comprise from the protrusion part 70b formed in the lower end of the. In this case, when the damper 70 is in the position of the solid line that closes the upper outlet 4, the projection 70b acts as a stabilizer, and when it is in the position of the alternate long and short dash line, the flat portion 70b.
a functions as a rear guider.

Further, although the convection blower 18 is provided in the air passage 6b, a blower having an axial fan may be provided on the back surface of the main body case 1 to blow air to the air passage 6b via the grill 3 by the blower.

Further, the reed switch 28 for detecting the switching of the damper 21 may have an open / closed switching state opposite to that of the above-described embodiment, or instead of the reed switch 28, a micro switch, a limit switch, a position sensor or the like is blown upward. They may be provided at the position of the outlet and the position of the front outlet, respectively.

Further, in the present invention, permanent magnets are provided at respective positions of the front end b and the rear end a in FIG. 2, and the damper 21 has the front end b and the rear end a.
The damper 21 may be brought into contact with the front end b and the rear end a by the magnetic force of the permanent magnet. With this configuration, the damper 21 does not move until it comes into contact with the front end b and the rear end a, and the gad motor 22 can be stopped before that, so that the gad motor 22 is overloaded with a simple structure. Can be prevented.

Further, in the above-mentioned embodiment, the invention is applied to the gas warm air heating device, but it may be applied to a forced air supply / exhaust type warm air heating device (so-called FF type heating device). A heater, petroleum or kerosene may be used.

In addition, the rotation angle interval of the damper 21 is not limited to only 60 degrees, and can be appropriately changed according to the implementation state, and various changes can be made without departing from the scope of the present invention.

[Brief description of drawings]

1 and 2 are vertical cross-sectional views of the gas heating device viewed from different directions, and FIG. 3 is a cutaway front view of the gas heating device.
FIG. 5 is an enlarged perspective view of a main part, FIG. 5 is a block diagram showing a control means, and FIGS. 6 to 9 are vertical cross-sectional views of a gas hot air heating device showing another embodiment of the present invention. FIG. 7 is a fractured cross-sectional view showing a modified example of the damper. In the figure, 1 ... Main body case, 4 ... Upper outlet, 5 ... Front outlet, 7 ... Burner plate, 10 ... Combustion blower, 18 ... Convection blower, 21 ... Damper (switching means) ), 31 ... Temperature control means

Claims (1)

[Claims] 1. A front air outlet provided on a front surface of a device body, an upper air outlet provided on an upper surface of the main body, a blower provided in the main body, and a front air outlet provided by the blower. In a warm air heating device having a heat source that uses hot air as a hot air, a switching unit that switches between the front outlet and the upper outlet, and a control unit that controls the blower, the heat source, and the switching unit, the control unit is With the operation start operation of the warm air type heating device, the air from the blower is switched to the upper air outlet by the switching means, and when the temperature of the air blown from the upper air outlet becomes a predetermined temperature, the upper air outlet is replaced. A warm air type heating device, characterized in that the front air outlet is opened, and when the operation is stopped, the air from the blower is switched to the upper air outlet by the switching means.