JPH05106918A - Burner - Google Patents

Abstract

PURPOSE:To provide a method to prevent simply an excessive temperature rise in a burner device due to the wind blowing towards the burner, etc., while the combustion is stopped with no influence on the cost and the appearance. CONSTITUTION:A supply air temperature sensor 9 is provided at the supply air port 8 of a blower 3 in a burner. When this supply air temperature sensor 9 senses the temperature which is higher than a specified temperature level, the blower 3 is actuated to control the supply air temperature to keep it at a set temperature level by means of a controller 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device used for a water heater, a heater or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, even when combustion is stopped, the temperature in the combustion apparatus rises due to the heat of a high temperature part such as a combustion chamber due to back wind from the exhaust port. It may raise the whole. In order to prevent this, the shape of the chimney is modified as shown in FIG. 3 or the long chimney 30 is fitted with a roof 31 as shown in FIG.
The method such as stretching it up is taken. In the conventional example of FIG. 3, the wind of the blower 3 provided inside the exterior of the water heater blows the exhaust gas from the burner 1 through the exhaust port 7 to the outside through the opening 21a around the exhaust top 21 Even if it hits the exhaust top 21, the wind does not pass directly through the exhaust top 21 due to the internal air stop 22 so that no backwind is applied to the inside of the main body.

[0003]

However, in the conventional method as described above, when the long chimney is extended to the top of the roof so as not to receive the back wind, the cost of the chimney construction is high and the appearance is not preferable. There were challenges.
There are also some that solve the problems of aesthetics and construction by using an exhaust top with a special shape that does not cause backwind, but there was a problem of higher cost.

The present invention solves the above problems, and an object of the present invention is to provide a combustion apparatus which has a simple structure and eliminates the influence of backwind.

[0005]

In order to solve the above-mentioned problems, a combustion apparatus according to the present invention comprises a blower for sending combustion air of the combustion apparatus, and a supply air temperature detector provided at an air supply port of the blower, It consists of a controller that detects the supply air temperature and controls the blower, and the controller operates the blower when the supply air temperature detector is above the temperature set during normal combustion to stop the supply air temperature detector while the combustion is stopped. It should be kept below the set level.

[0006]

According to the present invention, when the blower is in a stopped state, the heat of the high temperature part such as the combustion chamber is transferred to the air supply port of the blower by the back wind and the air is supplied assuming the normal combustion. By operating the blower when the temperature is exceeded, that is, when the temperature exceeds the set temperature level, it is possible to prevent the hot air from returning to the air inlet portion and prevent the temperature rise in the combustion device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a water heater using the combustion apparatus of the present invention, in which fuel is sent to a burner 1 by a fuel pump 2.
Combustion air is blown by the blower 3 and electric sparks generated by the igniter 4 and the ignition electrode 5 ignite the fuel to form a flame on the burner 1.

A heat exchanger 6 is provided above the burner 1, and the combustion exhaust gas that has undergone heat exchange is discharged from an exhaust port 7 above the heat exchanger 6.

An air supply temperature detector 9 is provided at the air supply port 8 of the blower 3. Reference numeral 10 is a controller for controlling each function, 11 is an operating portion of the combustion device, 12 is a combustion chamber between the burner 1 and the heat exchanger 6, and 13 is an exterior of the water heater.

The operation of the above configuration will be described. When the blower 3 is stopped and a back wind is applied from the exhaust port 7, the heated air passes through the inside of the blower 3 through a portion having heat, that is, the heat exchanger 6, the combustion chamber 12, the burner 1, and the like. ,
The exterior 13 is filled from the air supply port 8 and the temperature inside the exterior rises. At this time, when the supply air temperature detector 9 reaches a temperature exceeding the supply air temperature assumed during normal combustion, the blower 3 is operated for a certain period of time, and air is blown to the exhaust side, and when the temperature falls below the set temperature level, the blower 3 is stopped. .. Of course, if the temperature does not fall below the set temperature level, the blower 3 continues to operate until it falls below the set temperature level, but the backwind condition is not a phenomenon that continues indefinitely, and the temperatures of the heat exchanger 6 and the combustion chamber 12 also become high forever. Since it does not exist, the supply air temperature detector 9
Does not detect the temperature above the set temperature level and activates the blower 3 often, so that there is no problem in terms of durability of the blower 3. Further, the noise of the blower 3 is also much lower than the maximum combustion amount when the blower 3 is operated by the signal of the air supply temperature detector 9, and even if the noise of the blower is set to a level that is hardly noticeable, the effect of preventing the blower is It can be fully demonstrated. FIG. 2 is a graph showing an example of the set temperature level of the supply air temperature detector 9, the supply air temperature during normal combustion, and the operation of the blower 3 by the detection of the supply air temperature detector 9.

In FIG. 2, the supply air temperature during normal combustion is the outside air temperature (a temperature of about 0.degree. C. to 40.degree. C.), which is a value obtained by adding a slight amount of heat until the combustion air passes through the airframe to reach the air supply port 8. ℃), and the air supply temperature detector 9 during the stop sequence of the blower 3
Has detected that a temperature exceeding a set temperature level (here, 60 ° C.) has occurred due to factors such as back wind, it has been shown to operate the blower 3 to lower the temperature of the air supply port 8.

[0013]

As described above, according to the present invention, the blower for sending the combustion air of the combustion device, the air supply temperature detector provided at the air supply port of the blower, and the air supply temperature are detected to control the air blower. It consists of a controller, which controls the blower to operate the blower when the temperature of the intake air temperature detector exceeds the temperature set during normal combustion, and keeps the temperature of the intake air temperature detector below the set level. The high temperature heat of the combustion chamber does not raise the temperature inside the device, and it can be prevented without affecting the cost and aesthetics such as the chimney construction.

[Brief description of drawings]

FIG. 1 is a water heater using a combustion device according to an embodiment of the present invention.

FIG. 2 is a diagram showing changes in set temperature level of the air supply temperature detector of the present invention, air supply port temperature during normal combustion, and air supply port temperature during blower operation.

[Fig. 3] Diagram of using an exhaust top with a special shape in a conventional combustion device

[Fig. 4] A view of the chimney extended above the roof by a conventional combustion device.

FIG. 5 is a diagram showing that the temperature of the air supply port rises due to back wind in a conventional combustion device.

[Explanation of symbols]

 1 Burner 3 Blower 8 Air inlet 9 Air temperature detector 10 Controller

Claims (1)

[Claims] 1. A controller comprising a blower for sending combustion air of a combustion device, a supply air temperature detector provided at an air supply port of the blower, and a controller for detecting the supply air temperature and controlling the blower. Is a combustion device that keeps the temperature of the supply air temperature detector below the set level by operating the blower when the temperature of the supply air temperature detector exceeds the temperature set during normal combustion.