JP2007107824A - Glass breakage detector for hot air heater with glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure safety in the event of breakage of a glass plate as a casing due to some sort of cause, in a hot air heater with glass. <P>SOLUTION: A microswitch 15 is provided on the inside of the glass plate 5, and arranged so that its detection lever is in ON state by contact with the reverse side of the glass plate 5. In the event of falling by breakage of the glass plate 5 or mounting omission of the glass plate 5, the microswitch 15 is laid in OFF state and determines abnormality of the glass plate 5, and an operation control device 14 stops combustion of a burner 8 and stops drive of a blowing fan 10 after cooling for a fixed time so as to stop the operation of the heater. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to safety when a glass breaks in a warm air heater using glass as an exterior component.

  Conventionally, a glass plate is arranged on the front of a hot air heater, and a light emitter is installed behind the glass plate to cause the light emitter to emit light in conjunction with the combustion operation. There is a wind heater (see, for example, Patent Document 1).

  As shown in FIG. 5, the hot air heater is surrounded by a back plate 1 on the rear surface, a front plate 2 on the front surface, a bottom plate 3 on the bottom surface, and a top plate 4 on the top surface as a casing constituting the exterior. A glass plate 5 provided so as to expose three of the peripheral end surfaces 4 for decoration, an intake port 6 provided in the back plate 1, air 7 taken in from there, and a burner 8 for burning the fuel , An air path 9 for mixing the exhaust gas generated by the combustion and the air 7, a blower fan 10 for sending the mixed air to the outside, a motor 11 for driving the air, an air outlet 12 provided on the front of the device, a temperature The front plate 2 is provided with a light emitter that emits light in conjunction with a combustion operation (not shown), and passes through the glass plate 5, and includes a wind 13, an operation control device 14 that controls the burner 8 and the motor 11. So that it can be seen from a distance, Confirmation and so that visually enhance the feeling of warmth.

  In the hot air heater configured as described above, conventionally, as a countermeasure to the glass plate 5 breakage accident, the glass plate 5 is subjected to a tempering treatment, or a scattering prevention film is attached to the back surface of the glass plate 5. is doing.

  In addition, since the front plate 2 is provided even without the glass plate 5, the sealing performance is not greatly impaired. Therefore, even if the glass plate 5 is damaged, there is no influence on the combustion characteristics. There was no mechanism to detect this.

Although the product fields are different, in some microwave ovens, a film having conductivity is formed on the surface of a glass plate, and resistance values at both ends are detected to determine the presence or absence of destruction (for example, see Patent Document 2). ).
JP 2004-198083 A JP-A-9-48640

However, in the conventional configuration and operation, even when the glass plate is broken, the operation is continued as usual, and the user may not notice. For this reason, there is a risk of injury by touching the device or stepping on a piece of glass that has fallen close to it.
Although there is no problem with the combustion characteristics within the assumed range, it cannot be determined whether there is a problem under abnormal use conditions outside the assumed range.

  In addition, when forming a conductive film in a microwave oven, the glass plate needs to be organically printed for decoration, including metallic colors, and adhesion and electrical resistance variations occur, and an anti-scattering film is applied. It is conceivable that the configuration for measuring the electric resistance value is difficult and expensive in terms of cost.

  In order to solve the above-mentioned conventional problems, the glass breakage detection device of the glass-equipped hot air heater of the present invention is provided with a microswitch inside the glass plate, and the detection lever of the microswitch is in contact with the back surface of the glass plate. Arrange it so that it is in the ON state.

  Then, it is determined that the microswitch is ON (short in electrical resistance), and normal operation is performed.

  On the other hand, in the case of dropping off due to breakage of the glass plate or forgetting to attach the glass plate, the micro switch is turned off (open in electrical resistance) to determine the abnormality of the glass plate, and to stop the operation by the operation control device, Stop burning after burning the burner and cooling the blower fan for a certain time.

  The glass breakage detection device of the glass-equipped hot air heater of the present invention is provided with a glass breakage detection device that directly detects the breakage state of the glass plate provided on the front surface of the main body, and burns the burner by a signal from the glass breakage detection device. Since it is stopped, it is possible to provide a hot air heater that is safe and highly interior.

  1st invention provides the glass plate used as one of the casings which comprise an exterior, the other casing which each provided the air inlet and the warm air outlet in part, and the detection lever in contact with the inside of a glass plate A micro switch, a burner that burns fuel, a blower fan that sends out mixed air that is a mixture of exhaust gas generated by combustion and external air, and combustion of the burner and blower fan by detecting ON / OFF of the micro switch An operation control device that controls the drive, and when the glass plate falls off due to breakage, the microswitch detects from the ON state to the OFF state, the operation control device stops combustion in the burner, and the blower fan Is stopped after cooling for a certain time.

  According to a second aspect of the present invention, a spring having an elastic force that always pushes the glass plate outward is provided inside the glass plate and in the vicinity of the microswitch. There is a relationship of t ≧ s with the amount of deflection t (including mounting play) by which the glass plate is deformed outward and the operating distance s of the detection lever of the microswitch.

  According to a third aspect of the present invention, it is assumed that an impact sensor in contact with the inside of the glass plate is provided as a detection means for the operation control device, and the glass plate is subjected to an impact of an impact amount w and the glass plate is damaged. When there is a relationship of w ≧ v with the impact amount v, the operation control device performs the same operation.

  4th invention alert | reports the said same operation | movement by the said operation control apparatus, and the failure | damage of a glass plate with a lamp | ramp.

  5th invention alert | reports the said same operation | movement by the said operation control apparatus, and the failure | damage of a glass plate with a buzzer.

  In the sixth aspect of the present invention, after the same operation by the operation control device, the operation is not restarted unless it is released by a reset switch.

In a seventh aspect of the invention, the reset switch is provided inside the glass plate and cannot be released unless the glass plate is removed.
Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited by the present embodiment.

(Embodiment 1)
FIG. 1 is a configuration diagram of a glass breakage detection apparatus for a glass-equipped hot air heater in the first embodiment of the present invention, and FIG. 2 is a flowchart of the same.

  Since the configuration of the hot air heater is the same as the conventional one, the description is omitted.

  As shown in FIG. 1, a micro switch 15 is provided on the front plate 2 so that the glass plate 5 is in contact with a position of an operating distance s that reliably detects the lever of the micro switch 15 from the OFF state (free state).

  Next, the glass plate 5 cannot be maintained in its initial plate shape due to breakage, and the installation portion of the microswitch 15 moves outward t due to backlash within the attachment range of the glass plate 5 or by its own weight. To do.

  The operation control device 14 controls combustion in the burner 8 and driving of the blower fan 10 by detection of the microswitch 15.

  As shown in FIG. 2, when the operation SW is turned on, it is detected that the micro switch 15 is in the ON state, and an appropriate amount of fuel and drive voltage set in advance by the operation control device 14 are controlled, and combustion and ventilation are performed. I do.

  At this time, if the microswitch 15 is in the initial OFF state, it is determined that the glass plate 5 is broken or not attached, and the operation is not started.

  Next, after the operation is started normally, when the OFF detection of the micro switch 15 is detected due to the glass plate 5 being broken or the like, the operation control device 14 immediately stops the combustion, and the blowing is also stopped after the predetermined cooling time a has elapsed. To do.

(Embodiment 2)
FIG. 3 is a configuration diagram of a glass breakage detection device for a glass-equipped hot air heater in the second embodiment of the present invention, and FIG. 4 is a flowchart of the same.

  Since the configuration of the hot air heater is the same as the conventional one, the description is omitted.

  As shown in FIG. 3, an impact sensor 16 is provided on the front plate 2 so as to be in contact with the glass plate 5 in order to easily detect the impact received on the glass plate 5.

  The operation control device 14 controls the combustion in the burner 8 and the driving of the blower fan 10 by the detection of the impact sensor 16 and operates the notification device 17 provided on the top plate 4 to notify.

  Further, a reset switch 18 is provided inside the glass plate 5 and on the front plate 2.

  As shown in FIG. 4, when the operation SW is turned on, the impact amount w detected by the impact sensor 16 is w <v with respect to the impact amount v assuming that the glass plate 5 is damaged. And an appropriate amount of fuel and driving voltage set in advance by the operation control device 14 are controlled to perform combustion and blowing.

  At this time, if the impact sensor 16 is w ≧ v, an abnormality of the impact sensor 16 is determined and the operation is not started.

  Next, after starting operation normally, if it is detected that w ≧ v due to some impact on the glass plate, the operation control device 14 immediately stops the combustion, and the blowing is also stopped after the predetermined cooling time a has elapsed. To do.

  At the same time as the combustion is stopped, the notification device 17 operates to notify the user.

  Next, when it is attempted to start operation after improving the malfunction caused by the breakage of the glass plate 5 causing the abnormality, the operation cannot be started unless the reset is detected by the reset switch 18.

  As described above, the glass breakage detection device for a glass-equipped hot-air heater in the present invention detects that the glass plate has a defect due to breakage or the like in the case where the glass plate is used for the casing constituting the exterior. Is possible.

The block diagram of the glass breakage detection apparatus of the warm air heater with glass in Embodiment 1 of this invention Flow chart of glass breakage detection device for hot-air heater with glass The block diagram of the glass breakage detection apparatus of the warm air heater with glass in Embodiment 2 of this invention Flow chart of glass breakage detection device for hot-air heater with glass Configuration diagram of a conventional hot air heater with glass

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Back plate 2 Front plate 3 Bottom plate 4 Top plate 5 Glass plate 6 Intake port 7 Air 8 Burner 9 Air path 10 Blower fan 11 Motor 12 Outlet 13 Hot air 14 Operation control device 15 Micro switch 16 Impact sensor 17 Notification device 18 Reset switch

Claims (7)

A glass plate that is one of the casings that make up the exterior, another casing that is provided with a part of each of the air inlet and the hot air outlet, a micro switch that is provided so that the detection lever is in contact with the inside of the glass plate, and fuel Control that controls the combustion of the burner and the drive of the blower fan by ON / OFF detection of the microswitch, and the blower fan that sends out the mixed air that is a mixture of the exhaust gas generated by the combustion and the external air When the glass plate falls off due to breakage, the microswitch detects from the ON state to the OFF state, the operation control device stops combustion in the burner, and the blower fan is driven for a certain period of time. A glass breakage detecting device for a hot-air heater with glass, which is stopped after cooling. A spring having an elastic force that always pushes the glass plate outward is provided inside the glass plate and in the vicinity of the micro switch. If the glass plate is not dropped even if it is damaged, the glass plate is deformed outward by the elastic force of the spring. The glass breakage detection of the glass-equipped hot air heater according to claim 1, wherein the deflection amount t (including mounting play) and the operating distance s of the detection lever of the microswitch have a relationship of t ≧ s. apparatus. As a detection means to the operation control device, an impact sensor in contact with the inside of the glass plate is provided,
The operation control device performs the same operation when there is a relationship of w ≧ v with an impact amount v assuming that the glass plate is subjected to an impact of an impact amount w and the glass plate is damaged. Item 2. A glass breakage detection device for a hot-air heater with glass according to Item 1. The glass breakage detection device for a glass-equipped hot air heater according to claim 1, wherein the operation control device notifies the same operation and breakage of the glass plate by a lamp. The glass breakage detection device for a glass-equipped hot air heater according to claim 1, wherein the same operation by the operation control device and breakage of the glass plate are notified by a buzzer. 2. The glass breakage detection device for a warm air heater with glass according to claim 1, wherein after the same operation by the operation control device, the operation is not restarted unless it is canceled by a reset switch. The glass breakage detecting device for a hot-air heater with glass according to claim 6, wherein the reset switch is provided inside the glass plate and cannot be released unless the glass plate is removed.

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