JP2001056155A - Controller of hot-air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to display a reason a user cannot start burning by detecting the opening or closing state of a fan guard attached by such as hinges by an opening and closing detector and controlling it displayable on the display of temperature, etc. SOLUTION: A controller 9 starts burning at a burner 8 when an operation switch is turned on by a user, and stops the burning at the burner 8 when the operation switch is turned off. A display 10 displays information, such as a room temperature, a set temperature, and time. When a fan guard 4 is opened, an opening signal is sent by the switch 7 of an opening and closing detector 9 to the controller 9 and when the burning is going on, the burning at the burner 8 is immediately stopped by this signal and the current supply to a convection blower 2 is simultaneously stopped. On the other hand, the display 10 displays such as an error code to inform the user that the fan guard 4 is open.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a hot air heater such as an oil fan heater and a gas fan heater.

[0002]

2. Description of the Related Art FIG.
FIG. 5 is a cross-sectional view of a convection blower mounting portion of the conventional hot air heater described in Japanese Patent No. 167668. In the figure, 1 is a main body of a hot air heater, and 2 is a convection blower for discharging hot gas generated by combustion in a burner (not shown) provided inside the main body 1 as hot air. Is provided corresponding to the air intake port 1a formed on the back surface of the. Three
Is a fan motor that rotationally drives the convection blower 2,
Reference numeral 4 denotes a fan guard for preventing dust and foreign matter from entering the inside of the main body 1 from the air inlet 1a, and has a large number of small holes 4a. The fan motor 3 is attached to the fan guard 4 by screws or the like, and the convection blower 2 is attached to a rotating shaft 3a of the fan motor 3 by a nut or the like.

A hinge device 5 is fixed to the periphery of the air inlet 1a on the back of the main body 1 with screws or the like. One side of the fan guard 4 is rotatably attached to the back of the main body 1. Reference numeral 6 denotes two thumb screws for fixing one side of the fan guard 4 on the side opposite to the side on which the hinge device 5 is mounted to the screw hole 1b provided on the back surface of the main body 1. Can be picked and squeezed or removed. Reference numeral 7 denotes a switch for detecting the open / closed state of the fan guard 4 provided in the main body 1. Various switches such as a mechanical type, an optical type, and a magnetic type are used.

Next, the operation will be described. When the combustion is started, a flame is formed in a burner (not shown), and this flame generates a hot gas. The high-temperature gas is pushed out to the entire surface together with the air sucked in from the air intake 1a by the rotation of the convection blower 2 due to energization of the fan motor 3, and is discharged from the hot-air outlet (not shown) to be used for indoor heating. .

[0005] As described above, this type of warm air heater has a structure in which the air in the room is taken in during combustion and the warm air is released, so that dust in the air is also sucked in. The portion is a small hole 4a so that dust is prevented from entering the inside as much as possible. However, as the usage time is accumulated, dust passing through the small holes 4a of the fan guard 4 gradually adheres to the end and the surface of the convection blower 2, and the internal temperature of the main body 1 accompanying the decrease in the blown air amount is reduced. Various problems such as rising and bad odors occur, and in order to solve these problems, it is necessary to have the user periodically clean the fan guard 4 and the convection blower 2.

Therefore, when cleaning becomes necessary, the thumb screw 6 is loosened and removed with a finger, and the fan guard 4 is turned to the state shown in FIG. The cleaning work can be performed very easily. In the event that the fan guard 4 is opened during the combustion, the burner (not shown) is stopped immediately by the signal from the switch 7 serving as the open / close detecting means, as shown in FIG. The power supply to the fan motor 3 is stopped.

[0007]

However, in the above-mentioned conventional method, when the user opens the fan guard 4 to clean the convection blower 2 and the like, then closes the fan guard 4 and tries to restart combustion again. If the thumb screw 6 is not sufficiently closed, the switch 7 for detecting the open / closed state of the fan guard may not detect the closed state. For this reason, combustion does not start, and the fan guard 4
However, there is a problem that it is difficult for the user to understand the reason why the combustion cannot be started because it seems to be properly closed. If the switch 7 fails, the fan guard 4
However, even if the switch is properly closed, the switch 7 cannot detect the closed state, so that there is a problem that it is difficult to grasp the cause of the inability to start the combustion. Further, when it is detected that the fan guard 4 is open due to a failure of the switch 7 or the like, there is a problem that it is difficult for the user to immediately notice the fan guard 4.

SUMMARY OF THE INVENTION The present invention solves the above-described problems, and detects that the fan guard is open due to the fact that the fan guard is actually opened or the switch for detecting the open / closed state of the fan guard is out of order or for some reason. It is an object of the present invention to provide an easy-to-use control device for a hot-air heater that can be easily confirmed by a user when the operation is being performed, and can be immediately noticed.

[0009]

According to the present invention, there is provided a control device for a hot air heater, comprising: a display section for displaying temperature information and the like; a convection fan for discharging hot gas generated by a burner as hot air; A fan guard provided so as to cover the convection blower, which is pivotally attached by a hinge device, etc., an open / close detector that detects the open / closed state of the fan guard, and an open / closed detector that detects the open state of the fan guard Then, a control unit is provided for causing the display unit to display that the fan guard is open.

[0010] Further, a notifying unit for emitting a confirmation sound or a warning sound, a convection fan for releasing hot gas generated by the burner as hot air, and a hinge device or the like provided to cover the convection fan and openable and closable. A fan guard pivotally attached to the fan guard, an open / close detection unit for detecting the open / closed state of the fan guard, and when the open / closed detection unit detects the open state of the fan guard, the notification unit indicates that the fan guard is open. And a control unit for performing notification.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a control device for a hot air heater according to Embodiment 1 of the present invention. Incidentally, the basic configuration of the hot air heater in the present invention,
Since they are the same as those shown in FIGS. 4 and 5, the same or corresponding parts are denoted by the same reference numerals and description thereof will be omitted.
In FIG. 1, reference numeral 8 denotes a burner provided inside the main body 1 of the hot air heater, which burns vaporized gas, vaporized liquid fuel, and the like. Reference numeral 9 denotes a control unit for controlling the entire hot air heater in accordance with a program stored in advance. The control unit 9 controls the combustion in the burner 8 and the fan motor 3 of the convection blower 2 for discharging hot gas generated by the combustion as hot air. , And a display unit 10 such as a 7-segment for displaying numbers and figures such as temperature information and time, and a liquid crystal.

Next, the operation of the control device according to the first embodiment of the present invention will be described. FIG. 2 is a flowchart showing an operation of the control device for the hot air heater shown in the first embodiment. In FIG. 2, when the user turns on an operation switch (not shown) arranged in an operation unit (not shown) provided in the main body 1 in step 20, the control unit receives this ON signal and receives an ON signal. 9 starts the combustion in the burner 8 (step 21), and at the same time, energizes the fan motor 3 to start the rotation speed control of the convection fan 2 (step 22). Generally, when the combustion amount in the burner 8 is large, the rotation speed of the convection blower 2 is high, and conversely, when the combustion amount is small, the rotation speed is low so that the rotation speed is controlled by the rotation speed corresponding to the combustion amount. ing. Thereby, the high-temperature gas generated by the combustion in the burner 8 is supplied to the air inlet 1 a by the rotation of the convection blower 2.
The air is pushed out to the front together with the air that has been sucked in, and is discharged from a hot air outlet (not shown) to be used for heating the room.

On the other hand, when the user turns the operation switch (not shown) to "OFF" in step 20, the control unit 9 receives the OFF signal, stops the combustion in the burner 8, and performs a fire extinguishing operation (step 20). 23). After the fire is extinguished, in order to cool the inside of the main body 1 which has been heated by the heat generated during the combustion for a certain period of time (step 24), the convection air blower 2 is kept rotating and cooled (step 22). Thereafter, when the inside of the main body 1 is sufficiently cooled, the power supply to the convection blower 2 is stopped (step 25).

Next, at step 26, the display section 10 displays temperature information such as room temperature and set temperature, time, and the like. Thereafter, since the fan guard 4 is normally closed, the operations at steps 20 to 27 are performed. Will be repeated.

Next, at step 27, when the fan guard 4 is opened, the switch 7 serving as an open / close detecting unit is opened.
As a result, a signal indicating that the fan guard 4 is open is sent to the control unit 9. At this time, if the combustion is being performed, the combustion is immediately stopped by the burner 8 in response to this signal (step 28). The power supply to the blower 2 is stopped (step 29). On the other hand, for example, FIG.
Error code (C9) or the like is displayed (step 3
0) to inform the user that the fan guard 4 is open.

When the user intentionally opens the fan guard 4 by himself / herself, that is, turns the operation switch "OFF".
Then, when the fan guard 4 is opened and the convection blower 2 or the like is to be cleaned, it is not necessary to display an error code (C9) or the like on the display unit 10, so that the operation switch is set to “OFF”. When the fan guard 4 is open, the display of the error code (C9) or the like may not be performed.

Furthermore, here, the display unit 10 is a seven-segment or liquid crystal display for displaying numbers and figures such as temperature information and time, but a dedicated lamp for displaying the open / closed state of the fan guard 4 on the display unit 10. May be provided, and this lamp may be displayed by lighting or blinking.

Embodiment 2 FIG. In the first embodiment, the user is informed of the open / closed state of the fan guard 4 by displaying a seven-segment for displaying numbers and figures such as temperature information and time, a liquid crystal display, or a display unit 10 formed of a dedicated lamp or the like. However, in the second embodiment, the fact that the fan guard 4 has been opened is notified by a buzzer that emits a confirmation sound, a warning sound, or the like, or a notification device such as a sound output device. That is, when the fan guard 4 is opened, a signal indicating that the fan guard 4 is opened is sent to the control unit 9 by the switch 7 which is an open / close detection unit. At this time, when combustion is being performed, In response to this signal, the combustion in the burner 8 is immediately stopped, and the power supply to the convection blower 2 is stopped. At the same time, the user is informed that the fan guard 4 is in the open state by, for example, a buzzer sound. Notify. At this time, the display unit 10
However, a display may be performed so that both the display unit 10 and the notification unit simultaneously notify that the fan guard 4 is open.

[0019]

According to the present invention as described above, a display unit for displaying temperature information and the like, a convection fan for discharging hot gas generated by the burner as hot air, and a convection fan are provided so as to cover the convection fan. A fan guard provided so as to be openable and closable by a hinge device and the like, an open / close detection unit for detecting the open / closed state of the fan guard, and a fan displayed on the display unit when the open / close detection unit detects the open state of the fan guard. There is a control unit that displays that the guard is open, so that the fan guard is actually opened, the open / close detection unit is broken, or the fan guard is opened for some other reason. When the state is detected, this state is displayed on the display unit, so that the user can easily confirm the reason why the combustion cannot be started.

Further, a notifying unit that emits a confirmation sound or a warning sound, a convection fan that emits high-temperature gas generated by the burner as hot air, and a hinge device that is provided to cover the convection fan and that can be opened and closed by a hinge device or the like. A fan guard pivotally attached to the fan guard, an open / close detection unit for detecting the open / closed state of the fan guard, and when the open / closed detection unit detects the open state of the fan guard, the notification unit indicates that the fan guard is open. Since the control unit for performing the notification is provided, not only can the user easily confirm the reason why the combustion cannot be started, but also it is detected that the fan guard is open due to a failure of the open / close detection unit or the like. In such a case, the user can notice immediately.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control device for a hot air heater according to Embodiment 1 of the present invention.

FIG. 2 is a flowchart showing an operation of the control device for the hot air heater according to Embodiment 1 of the present invention.

FIG. 3 is a diagram illustrating a display example of a display unit according to the first embodiment of the present invention.

FIG. 4 is a rear perspective view of a conventional hot air heater.

FIG. 5 is a cross-sectional view of a mounting portion of a convection blower of a warm air heater as a conventional example.

FIG. 6 is a rear perspective view of a conventional hot air heater with a fan guard opened.

FIG. 7 is an explanatory diagram showing a relationship between opening and closing of a fan guard of a hot air heater as a conventional example and a control operation of a fan motor.

[Explanation of symbols]

1. Main body of hot air heater, 2 convection blower, 3 fan motor, 4 fan guard, 5 hinge device, 7 open / close detection unit (switch), 8 burner, 9 control unit, 10 display unit.

Claims (2)

[Claims] 1. A display unit for displaying temperature information and the like, a convection fan for discharging high-temperature gas generated by a burner as hot air, and a hinge provided to cover the convection fan and capable of being opened and closed by a hinge device or the like. The worn fan guard, an open / close detection unit that detects the open / close state of the fan guard, and when the open / close detection unit detects the open state of the fan guard, the display unit displays an indication that the fan guard is open. A control device for a hot air heater, comprising: a control unit for performing the control. 2. A notification unit that emits a confirmation sound, a warning sound, and the like, a convection fan that releases hot gas generated by the burner as hot air, and a hinge device that is provided to cover the convection fan and that can be opened and closed by a hinge device or the like. A fan guard pivotally attached to the fan guard, an open / close detection unit for detecting the open / closed state of the fan guard, and when the open / closed detection unit detects the open state of the fan guard, the notification unit indicates that the fan guard is open. A control device for a hot air heater, comprising: a control unit for performing notification.