JPH04335952A - Hot air heater - Google Patents

Abstract

PURPOSE:To improve the temperature distribution of indoor air even in the case when a blowing off hot air is weak. CONSTITUTION:In a gas hot air heater 1 which is provided with a louver 9 which is long from side to side and partially opens a hot air outlet 5 in a vertical direction and controls the temperature of hot air blown off from the hot air outlet, a projected part 9f, which projects to the inner part of the hot air outlet 5, is formed in the central part of the louver 9. When the hot air outlet 5 is partially closed, the blowoff direction of the hot air is changed to both sides of the projected part 9f.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air heater equipped with a louver at the hot air outlet.

0002

[Prior Art] Hot air heaters use the stirring effect of indoor air by blowing out heated air as warm air.
In order to improve the indoor temperature distribution, in many floor-standing hot air heaters, the hot air outlet is formed in the front of the main body casing. On the other hand, in many cases, the heating capacity is automatically determined based on the room temperature and the set temperature. The convection fan is controlled so that the larger the capacity, the stronger the blowing capacity, and the smaller the heating capacity, the weaker the blowing capacity.

0003

[Problems to be Solved by the Invention] In this way, in a hot air heater, when the heating capacity is small, the blowing capacity of the convection fan is small, so it is difficult for the hot air to reach far, and the hot air is Since the warm air is blown out only in the front direction of the heater, the effect of stirring the indoor air by the blown hot air is weakened, resulting in a problem of poor temperature distribution.

SUMMARY OF THE INVENTION An object of the present invention is to provide a warm air heater that can improve the temperature distribution of indoor air even when the blowing capacity for blowing out hot air is weak.

[0005]

[Means for Solving the Problems] The present invention provides a hot air heater that is provided with a horizontally long louver that opens and closes a portion of the hot air outlet in the vertical direction, and that adjusts the warm air blown out from the hot air outlet. In the louver, a bent portion protruding toward the inside of the hot air outlet is formed in the center of the louver, and when a part of the hot air outlet is closed, the direction of hot air blowing is adjusted by the bending process. The technical means is to change to both sides of the part.

[0006]

[Function] In the present invention, the hot air outlet is provided with a louver, and when a portion of the hot air outlet is closed by the louver, the hot air hits the louver. The louver has a bent part that protrudes towards the inside of the hot air outlet, so
When the louver is closed, the hot air is separated to both sides by the bent part, changing the blowing direction, and furthermore, the hot air is guided laterally by the louver that spreads laterally to the hot air outlet. The hot air is blown out from the hot air outlet in a manner that it is dispersed in the lateral direction of the hot air outlet.

[0007]

[Effects of the Invention] In the present invention, since a louver having a bent portion projecting inward is provided at the hot air outlet,
The louvers smoothly spread the warm air laterally and blow it out. Therefore, even if the air blowing capacity is small, excellent temperature distribution can be obtained by simply closing a portion of the hot air outlet with the louver.

[0008]

EXAMPLES Next, the present invention will be explained based on examples. In the gas hot air heater 1 shown in FIG. 2, an outer casing 2 is formed from several members made of metal plates and resin, and a blower casing 3 is provided inside the outer casing 2, as shown in FIG. There is. The ventilation casing 3 is provided with an air intake port 4 consisting of a plurality of small openings at the upper part of the back surface of the outer casing 2, and a warm air outlet 5 for blowing out hot air at the lower part of the front surface of the outer casing 2. The intake port 4 is covered with a combustion air intake port 6 provided at the upper part of the back surface of the outer casing 2, and a filter 7 provided detachably on the outer casing 2. Filter 7 is for removing indoor dust.
A thin resin mesh is formed.

A once-through convection fan 8 is disposed inside the blower casing 3, and the air intake port 4 and hot air outlet 5 are located at the upstream and downstream ends of the blower casing 3, respectively. The opening 6 also serves as an upstream end of the blower casing 3 via a burner 10, which will be described later. The convection fan 8 drives an impeller 8a disposed inside the blower casing 3 by a DC motor 8b. The DC motor 8b is supplied with a DC current obtained by rectifying a commercial power source, and the current value is controlled in accordance with the combustion amount of the burner 10 by a microcomputer in a control device 30, which will be described later.

The hot air outlet 5 is provided with a louver 9 for closing a portion of the hot air outlet 5. Louva 9
As shown in FIG. 1, the plate has a horizontally long plate shape corresponding to the horizontally long hot air outlet 5, and is rotatably attached to the upper part of the inside of the hot air outlet 5 by a rotating shaft 9a provided inside. When the gad motor 9b is driven according to the operating state, it rotates via the link mechanism 9c to control the blowing state of the airflow passing through the hot air outlet 5. Here, the louver 9 opens and closes the upper half of the hot air outlet 5, and is also controlled to a half-open state to blow out the hot air diagonally downward, and each position is controlled by the output of the gad motor 9b. It is detected by detecting a plurality of grooves 9e formed in a state detection member 9d provided in the section using two microswitches (not shown).

A protrusion 9f is formed in the center of the louver 9 and is bent so as to protrude inward when the louver 9 is closed. This protrusion 9f is
As shown in FIG. 4, when the louver 9 is in the open state, there is no special effect on the hot air blown out, and when the louver 9 is in the half-open state, it is similar to the parts other than the protrusion 9f. The only difference is to change the hot air diagonally downward,
When the louver 9 is in the closed state, the protrusion 9f is located perpendicular to the hot air blown out, and thus acts to block the hot air. Therefore, when the louver 9 is in the closed state, the hot air is blocked by the protrusion 9f, and the blowing direction is changed to separate to both sides of the protrusion 9f.
The other portions allow the hot air outlet 5 to expand in the left-right direction and are blown out.

The effect of spreading hot air by the protrusion 9f when the louver 9 is in the closed state improves the temperature distribution in the room by closing the louver 9 when the air blowing capacity is small and the effect of stirring indoor air is small. can be done.

On the other hand, the convection fan 8 inside the blower casing 3
A burner 10 as a heating means is arranged on the upstream side of the burner 10, and the high temperature combustion gas generated by the burner 10 is mixed with indoor air taken in from the air intake port 4 as the convection fan 8 operates. The hot air becomes hot air, and the hot air outlet 5
It is blown out from. A nozzle 13, which serves as the downstream end of a fuel supply path 12 that guides fuel gas, is disposed in the air guide pipe 11 that guides combustion air from the suction port 6 to the burner 10, and the fuel gas ejected from the nozzle 13 is used for combustion. It is guided together with air into the mixing chamber 14 and burned in the burner 10.

In the fuel supply path 12, 15 and 16 are electromagnetic valves, 17 is a gas proportional valve, and 1 near the burner 10
8 is an ignition electrode, and 19 is a thermocouple for ignition detection and other purposes. The suction port 6 is provided with a room temperature sensor 20 for detecting the indoor temperature, and in the upstream part of the blower casing 3, a blower casing is installed to detect clogging of the filter 7 or overheating of the heater. A thermistor (not shown) is provided for detecting the temperature inside 3.

On the upper surface of the outer casing 2, an operation switch 21 for instructing start and stop of operation and an operation panel covered by a resin opening/closing lid 22 are provided. The heating machine 1 has a control device 3
Controlled by 0.

The control device 30 consists of a microcomputer (microcomputer) equipped with various input/output circuits and a drive circuit for driving each part of the gas hot air heater 1 by the microcomputer, and performs operation control, temperature control control, etc. , combustion control, convection control, and other controls to ensure safety.

In the operation control, ignition control and extinguishing control of the burner 10 are performed in accordance with the operation of the operation switch 21 to start and stop the operation. In addition, a timer operation is performed to stop or start the operation at a preset time according to some operation switches provided on the operation panel. Also, based on the output of the thermocouple 19 provided in the burner 10, ignition detection, misfire detection, etc. of the burner 10 are performed, and if ignition is not detected within a predetermined time during ignition operation, or once ignition is performed, combustion is performed. If a misfire is detected for some reason after starting,
It has a safety function that closes each electromagnetic valve 15, 16 to stop fuel supply to prevent gas leakage and to perform an abnormal stop. Furthermore, if there is an abnormality in the convection fan 8 or the air intake 4
If the temperature inside the blower casing 3 rises abnormally due to blockage, etc., or if a change in the installation state of the equipment is detected by an overturn switch (not shown), operation will be stopped to prevent overheating or fire. .

[0018] Temperature control control is performed by controlling the set temperature set by a pair of temperature setting switches 23 provided on the operation panel and the detection of the room temperature detected by the room temperature sensor 20 during temperature control operation other than at the initial stage of operation. Seven heating capacity levels from level 1 to level 7 are determined according to the temperature difference. Note that at the initial stage of the start of operation, level 8 for forced strong operation is determined.

Combustion control starts combustion by controlling each valve, ignition device, etc. in the fuel supply path 12 in a predetermined sequence by operation start control, and in temperature control operation after ignition is detected, the temperature is determined by temperature control. The gas proportional valve 17 is controlled according to the heating capacity level, and the amount of combustion is controlled so that the amount of heating corresponding to the heating capacity level is obtained.

In the convection control, the convection fan 8 and the louver 9 are controlled in accordance with the heating capacity level so that an air flow rate and air blowing temperature corresponding to the amount of heating by the burner 10 can be obtained. Further, in the ignition operation, the hot air outlet 5 is closed by the louver 9 and the opening area of the hot air outlet 5 is made small, thereby making the air-fuel mixture rich in gas and improving the ignitability. Within a predetermined time after the ignition of the burner 10 is detected, it will be in a half-open state or an open state depending on the indoor temperature and the elapsed time after the start of operation, and thereafter it will be in an open state or an open state depending on the heating capacity level. Closed.

In the gas hot air heater 1 of this embodiment having the above configuration, when the heating capacity level is low, the louver 9 is closed, and as a result, the hot air blown out from the hot air outlet 5 is reduced. is blown out to the left and right by the protrusion 9f of the louver 9, which improves the stirring effect and improves the temperature distribution in the room.

In the above embodiment, the louver 9 is shown that closes the entire upper part of the hot air outlet 5 in accordance with the width of the hot air outlet 5, but there is a gap with a certain width on both sides of the louver 9. However, it can spread warm air. Further, in the above embodiment, the central portion of the louver 9 is formed as a protruding portion 9f that protrudes toward the inside of the hot air outlet 5 when the louver 9 is in the closed state. What is necessary is to close the area and provide a hot air escape section to allow hot air to escape to both sides of the area.

[0023] In the above embodiment, an open-type heater that uses gas as fuel is shown, but it may also be one that uses oil as fuel, one that uses electric heating, or an FF type heater.

[Brief explanation of drawings]

FIG. 1 is a partial section showing a hot air outlet and a louver in a gas hot air heater showing an embodiment of the present invention.

FIG. 2 is a perspective view from the front showing the external appearance of a gas hot air heater showing an embodiment of the present invention.

FIG. 3 is a configuration diagram showing a schematic configuration of a gas hot air heater showing an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing the state of a louver in a gas hot air heater showing an embodiment of the present invention.

[Explanation of symbols]

1 Gas hot air heater (warm air heater) 5 Warm air outlet 9 Louver 9f Protruding part (bending part)

Claims (1)

[Claims] Claim 1. A hot air heater comprising a horizontally elongated louver that opens and closes a portion of the hot air outlet in the vertical direction, and that adjusts the hot air blown out from the hot air outlet, wherein the louver has a louver in the center thereof. A bent part protruding toward the inside of the hot air outlet is formed, and when a part of the hot air outlet is closed, the hot air blowing direction is changed to both sides of the bent part. Features a warm air heater.