JP3713693B2 - Combustion equipment - Google Patents

Description

BACKGROUND OF THE INVENTION
The present invention relates to a combustion apparatus such as a water heater, and more particularly to a combustion apparatus suitable for use in a cold region.
[0002]
[Prior art]
Conventionally, this type of combustion apparatus has been used very conveniently by supplying water, burning and heating it, and supplying hot water to various places such as a kitchen, a bathroom and a bathroom.
[0003]
[Problems to be solved by the invention]
Conventionally, although such a combustion apparatus exists, when used in a cold region, the following problems may occur.
[0004]
For example, when used in an area with a lot of snow, snow accumulates near the exhaust port 15 of the combustion apparatus having the combustion chamber 1 inside as shown in FIG. There is a risk of deviating from the amount.
[0005]
Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide a combustion apparatus that realizes a good exhaust state even when snow is accumulated near the exhaust port. To do.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is a combustion apparatus having a blower fan that discharges heated exhaust gas from a discharge port while burning and heating the incoming water. a temperature sensor for detecting the when the temperature sensor detects a predetermined temperature below the temperature which is cold state, prior Symbol blowing fan alone is operated have rows blowing outside from the exhaust port by snow exhaust near port And a maintenance control means for removing .
[0007]
According to the first aspect of the present invention, when the temperature sensor detects a cold state, the blower fan is operated to blow air from the exhaust port to the outside, so that snow accumulation near the exhaust port can be prevented, and the exhaust port The snow piled up nearby can be blown away.
[0008]
According to invention of Claim 2, it is a combustion apparatus which has a ventilation fan which discharges | emits the exhaust gas which burned exhaust water from the exhaust port while burning and heating the water which received water, Comprising: The temperature sensor which detects temperature, the when the temperature sensor detects a predetermined temperature below the temperature which is cold state periodically performs work movement before Symbol blower fans only exhaust port have rows aeolian outside from the exhaust port of the combustion apparatus And maintenance control means for removing nearby snow cover .
[0009]
According to the second aspect of the present invention, if the temperature sensor detects a cold state, the blower fan is operated to blow air from the exhaust port to the outside, so that it is possible to prevent snow accumulation near the exhaust port. If there is snow in the vicinity of the exhaust port, it can be blown off. Moreover, since the operation is performed periodically, it can be performed while realizing energy saving.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the combustion apparatus of the present invention is applied to a water heater.
[0011]
FIG. 1 shows the configuration of the combustion apparatus of the present invention.
[0012]
In this gas combustion apparatus, a combustion chamber 1 provided with a combustion tube 2, a gas nozzle 4 for supplying fuel gas from the gas tube 3 to the combustion tube 2 of the combustion chamber 1 through a nozzle holder 5, and the bottom of the combustion chamber 1 And an air supply / exhaust fan 6 for supplying combustion air to the inside and outside of the combustion pipe 2 and ignition means 7 (igniter 8 and spark plug 9) for igniting the air mixed gas in the combustion chamber 1. It is configured. Reference numeral 10 denotes a gas solenoid valve provided in the middle of the gas pipe 3. Reference numeral 11 denotes a heat exchanger disposed above the combustion chamber 1 through which a hot water supply pipe 12 is passed. Reference numeral 15 denotes an exhaust port.
[0013]
This gas combustion apparatus is provided with a control unit 20 constituted by a microcomputer or the like for controlling the operation as a water heater. The control unit 20 outputs an operation signal, and the operation states of the fan 6, the gas valve 10 and the ignition means 7 (igniter 8) are switched ON / OFF based on a command based on the operation signal. The control unit 20 inputs a switch signal from a running water switch (not shown) provided in the hot water supply pipe 12, and the operation signal is switched ON / OFF in synchronization with the switching of the switch signal.
[0014]
Further, a thermocouple 13 is provided above the combustion pipe 2 in the combustion chamber 1, and its output is output to the control unit 20 to detect ignition and digestion in the combustion chamber according to the state. This thermocouple 13 corresponds to an ignition detection means and a fire extinguishing detection means.
[0015]
Further, the combustion device is provided with a temperature sensor 16 for detecting the temperature around the combustion device, and the detection output is sequentially input to the control unit 20.
[0016]
Further, a remote controller 30 operated by a user is connected to the control unit 20, and the control unit 20 controls each unit based on information such as operation on / off and set temperature operated by the remote controller 30. The desired combustion control is executed.
[0017]
Next, the control unit 20 will be described in detail. The control unit 20 includes an ignition control means 21, a hot water supply control means 22, a maintenance control means 23, a timer means 24, and other control means 25. The ignition control means 21 performs an ignition operation by controlling the igniter 8 and the spark plug 9 as the ignition means 7 at the start of combustion, for example, when there is an operation ON signal from the remote controller 30. The hot water supply control means 22 is a means for adjusting the gas amount based on the set temperature information of the remote controller 30 and the like, and adjusting and controlling the rotational speed of the fan 6 in order to appropriately adjust the air-fuel ratio. The maintenance control unit 23 is a unit that operates at times other than the normal hot water supply control operation, and controls the operation for preventing the exhaust from being accumulated due to snow near the exhaust port 15 when used in a cold region. It is means to do. The timer means 24 is a time measuring means for measuring a predetermined time. The other control means 25 is a means for controlling operations other than those described above, and controls data transmission with the remote controller 30 side and controls the detection output of the sensors 13 and 16 and the like.
[0018]
Next, the control operation of the maintenance control means 23 performed as a countermeasure when used in a cold region or the like is performed with reference to the flowchart of FIG. First, the temperature detected by the temperature sensor 16 is monitored, and it is determined whether or not the detected temperature is equal to or lower than a predetermined temperature (T0) (steps S1 and S2). If the temperature is higher than the predetermined temperature (T0), the process returns to step S1. If the temperature is equal to or lower than the predetermined temperature (T0), the timer means 24 starts the timer (t1) (step S3), and the timer decreases the predetermined time (t1). The fan 6 is operated until counting is performed, and the ignition control means 21 is operated to perform a combustion operation (steps S4 and S5). Thereby, since hot air is blown from the exhaust port 15, it is possible to prevent snow from accumulating near the exhaust port. Can be excluded. The timer is then started and stopped until the timer means 24 counts a predetermined time (t2) (steps S7 and S8), and the process returns to step S1. Thereby, since maintenance operation for snow cover measures is intermittently performed, energy saving can be achieved. This intermittent operation timing is shown in FIG.
[0019]
In the above embodiment, during the operation by the maintenance control means 23, the fan is operated and the combustion operation is also performed in steps S4 and S5, and hot air is blown to the exhaust port 5. S5 may be omitted and only the fan may be driven. In this case, the effect of removing snow accumulation at the exhaust port 5 is reduced, but the operation becomes simple and fuel can be saved. And when the amount of snow is small, this effect can be expected.
[0020]
Moreover, in the said embodiment, although the operation | movement of the flowchart of FIG. 2 which makes the exhaust port 5 not block | close with snow is performed intermittently in step S7, S8, it was judged that it was required in step S2. In some cases, it may be performed all the time. However, intermittent operation is desirable from the viewpoint of energy saving.
[0021]
【The invention's effect】
As described above, according to the first aspect of the invention, when the temperature sensor detects a cold state, the blower fan is operated to blow air from the exhaust port to the outside, so that snow accumulation near the exhaust port is prevented. In addition, there is an effect that it is possible to blow away and remove snow accumulated in the vicinity of the exhaust port.
[0022]
According to the second aspect of the present invention, if the temperature sensor detects a cold state, the blower fan is operated to blow air from the exhaust port to the outside, so that it is possible to prevent snow accumulation near the exhaust port. is there. In addition, if there is snow accumulated in the vicinity of the exhaust port, the snow can be blown away. Furthermore, since this operation is performed periodically, there is an effect that can be performed while realizing energy saving.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an outline of a combustion apparatus.
FIG. 2 is a flowchart showing the operation of the present invention.
FIG. 3 is an explanatory diagram showing timings for turning on / off a maintenance operation.
FIG. 4 is an explanatory diagram of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Combustion pipe 4 Gas nozzle 7 Ignition means 20 Control part 21 Ignition control means 22 Hot water supply control means 23 Maintenance control means 24 Timer means 25 Other control means 30 Remote controller

Claims (2)

A combustion apparatus having a blower fan that discharges hot exhaust gas from the exhaust port while burning and heating the incoming water, and a temperature sensor that detects the temperature, and the temperature sensor is in a cold state upon detection of a temperature below the temperature, characterized by comprising a maintenance control means for removing snow before Symbol blower fans only have rows blowing outside from the exhaust port by operating the exhaust near port, the Combustion device. A combustion apparatus having a blower fan that discharges hot exhaust gas from the exhaust port while burning and heating the incoming water, and a temperature sensor that detects the temperature, and the temperature sensor is in a cold state when it detects a temperature below the temperature is, before Symbol regularly performs the work dynamic of the blower fan only, and maintenance control means for removing the snow in the vicinity of the exhaust port have line the wind from the exhaust port sent to the outside of the combustion apparatus A combustion apparatus comprising:

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