JP3372015B2 - Combustion equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device,
In particular, at the time of combustion, it passes through a ventilation filter that removes dust
The present invention relates to a combustion device that performs combustion by providing an appropriate amount of air by a blower fan. 2. Description of the Related Art Conventionally, as a combustion apparatus of this type, an air filter is attached to an air supply port of the combustion apparatus to remove factors that adversely affect the combustibility and durability of dust, oil, and the like.
Some are designed to ensure a good combustion state. [0003] Although such a combustion apparatus has been conventionally used, the conventional apparatus requires a filter when used in a bad environment where air contains a lot of dust and oil. It gradually gets dirty and gets clogged, and the air volume decreases,
There is a problem that the combustion characteristics deteriorate. In such a case, a certain degree of prediction can be made from the use condition such as the combustion time and the number of times of combustion of the combustion device, and the cleaning and replacement of the filter can be promoted. However, it is difficult to give appropriate instructions for cleaning the filter. If the filter is used in an environment where the air is not very dirty, a filter cleaning instruction may be issued even if the filter is not dirty. There is a problem that even though the filter is dirty, an instruction to clean the filter is not issued. Accordingly, the present invention has been made in view of such a problem, and an object of the present invention is to provide a combustion device which accurately detects the degree of clogging of a ventilation filter of the combustion device and realizes appropriate measures. And [0006] [0007] [Means for Solving the Problems] In order to achieve the above purpose
, The first aspect of the present invention, through the blowing filter for removing dust in the combustion, a combustion device that performs combustion by providing an appropriate amount of air by the blowing fan, detects the temperature of the combustion of the combustion device When the combustion temperature detecting means detects a temperature outside the normal range, the number of rotations of the blower fan is increased by a predetermined amount, and the number of times the predetermined amount is increased by the predetermined number of times increases the number of rotations of the blower fan. Fan motor control means for increasing the initial rotation speed; and said filter when the fan motor control means increases the rotation speed (or initial rotation speed) of the blower fan by a first predetermined amount (or first predetermined number of times). A filter cleaning display unit for prompting the cleaning of the fan and the fan motor control unit to set the rotation speed (or the initial rotation speed) of the blower fan to the first value.
A second predetermined amount larger than the predetermined amount (or the first predetermined amount).
Resetting the filter cleaning display means and the warning display means by a warning display means for giving an abnormality warning when the filter is raised (a second predetermined number of times greater than the predetermined number of times) and a filter attachment / detachment detection means for detecting attachment / detachment of the filter And display control means for performing the following. According to the first aspect of the invention, the combustion state of the combustion device is determined, and the degree of clogging of the filter is determined in association with the correction amount or the number of rotations for improving the combustion characteristics. Therefore, the degree of clogging of the filter is determined more accurately, and the fact is displayed on the filter clogging display means. The display is automatically reset by attaching / detaching the filter. In addition, the initial rotation speed of the blower fan can be increased in accordance with the degree of clogging of the filter, and the amount of blown air can be stabilized in a short time. [0010] Further, according to the first aspect of the invention, the user Ru is known clogging degree of the filter in two stages warning stage and cleaning stages. Preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the configuration of the present invention, and FIG. 2 is a flowchart showing the operation of the present invention. First, an outline of the configuration of the present invention will be described with reference to FIG. As shown in FIG. 1, the combustion apparatus 1 receives water from a water inlet 3 provided with a water amount sensor 9 in a can body 2 and receives heat from the heat exchanger 4.
It is heated and comes out of the bath. A combustion section 5 is formed in the vicinity of the heat exchanger 4, fuel is supplied to the combustion section 5 by a fuel supply pipe 12, and the amount of combustion is adjusted by adjusting the fuel supplied by a proportional valve 13. ing. Also,
A combustion state detecting means 6 is provided in the vicinity of the combustion section 5 so that the presence or absence of combustion of the combustion section 5 and the state of combustion can be detected. The combustion apparatus 1 is provided with a blower fan 15 so that air can be blown in accordance with the amount of combustion in the combustion section 5. In the blower fan 15, the fan motor 16 rotates the sirocco fan 17 to suck air from the air supply port, blows an appropriate amount of air to the combustion unit 5, and performs combustion at an appropriate air-fuel ratio. I have. Also,
A blower filter 18 is provided in the vicinity of the air supply port, and supplies clean air to the combustion unit 5 excluding those that hinder the burning of dust and dust in the air. Further, the filter 18 is provided with an attachment / detachment detecting means 19 for detecting the attachment / detachment, so that the attachment / detachment detecting means 19 can detect the detachment for cleaning the filter 18 or the detachment for replacing the filter 18. Next, the control section 20 will be described. The control unit 20 controls an appropriate amount based on various information such as the detection contents of the combustion state detection means 6, the water amount sensor 9, the attachment / detachment detection means 19, and various other sensors (not shown) and the operation contents of the remote controller 30. Combustion is performed and the water in the water inlet channel 3 is heated by the heat exchanger 4 to control various operation units so that the water can be discharged to a desired temperature. The control unit 20 includes hot water supply control means 21, combustion state determination means 22, fan motor control means 23, display control means 24, and other control means 25. The hot water supply control means 21 is means for heating water supplied from the water inlet channel 3 by the heat exchanger 4 and controlling hot water supply to a faucet or the like (not shown).
The amount of combustion is adjusted by adjusting the opening of the proportional valve 13 so as to reach the set temperature set at zero. The combustion state determining means 22 determines whether the combustion state of the combustion apparatus 1 is appropriate, and detects combustion at an appropriate air-fuel ratio, poor combustion due to insufficient air, and the like.
For example, a specific example will be described.
Is formed by a temperature sensor, and the combustion state can be determined by detecting the temperature of the inner flame of the flame of the combustion section 5. For example, 40
It can be determined that normal combustion occurs at 0 to 600 ° C, and that there is insufficient air at 600 ° C and higher. Note that this temperature range varies depending on conditions such as the type of the combustion device 1, the type of fuel, and the position to be detected. Further, as another example, it can be realized by various means such as a means for determining a combustion state by determining a color of a flame. The fan motor control means 23 controls the amount of air blown by the blower fan 15 and blows an appropriate amount of air according to the amount of combustion in the combustion section 5. The display control unit 24 is a unit that controls display of the display units 32 and 33 of the remote controller 30. The other control unit 25 performs various controls other than those described above, and performs, for example, monitoring control of a sensor and control of data transmission with the remote controller 30. Next, the remote controller 30 will be described. The remote controller 30 includes an operation unit 31,
It has a filter cleaning display unit 32 and a filter warning display unit 33. The operating means 31 is means for setting and operating the temperature at which hot water is discharged from the combustion device 1 and for performing various operations. The filter cleaning display means 32 is a means for displaying that the filter needs to be cleaned. The filter warning display means 33 is a means for displaying a warning that the filter is dirty and the combustion is adversely affected to such an extent that combustion should not be continued. This display means 32, 3
Reference numeral 3 corresponds to filter clogging display means. Next, the operation of the present invention will be described with reference to the flowchart of FIG. When there is a combustion instruction in the combustion device 1, first, the filter attaching / detaching detecting means 19 determines whether or not the filter 18 is detached (step S).
1). If the filter 18 is attached, combustion starts (step S2). When the combustion starts, the combustion state determination means 22 determines the combustion state based on the detection content of the combustion state detection means 6. Specifically, the combustion state detecting means 6
Detects the temperature of the internal flame of the flame, and determines, based on the temperature, whether combustion is performed at an appropriate air-fuel ratio or whether there is insufficient air (step S3). Then, if the detected temperature is within the predetermined temperature range, an appropriate amount of air is secured, and the process proceeds to step S6 to repeat steps S3 to S3 until the combustion is completed.
S6 is repeated (steps S4, S6). If it is out of the predetermined temperature range in step S4, the fan motor control means 23 increases the rotation speed of the blower fan by 2%. This is because the amount of air is insufficient when the combustion state detecting means 6 exceeds a predetermined temperature, for example. If the number of revolutions does not improve even if it increases by 2%, the operations of steps S3 to S6 are repeated, and the operations are repeated until the number of revolutions is improved or until the end of combustion. The main cause of such a shortage of air is that the filter 18 becomes clogged with dust and oil in the air as it is used, and the amount of air blown by the blower fan decreases even if the fan rotates at the same rotation speed. It is. When the combustion is completed in step S6,
Next, it is determined whether or not the operation of increasing the rotation speed in step S5 has been performed (step S7). If not, step S1
Then, if there is, an up counter for storing the number of times the number of rotations has been increased is incremented by 1 (step S8). When the up counter counts a predetermined number of times (for example, 10 times), the initial rotation number of the fan motor is increased by 2%. If the fan rotation speed is increased by about 10 times, it can be determined that the filter 18 has begun to be contaminated, and since the blowing resistance has increased somewhat, the initial rotation speed is set in advance in consideration of this. It is raised. Then, it is determined whether the initial rotational speed is increased by a first predetermined amount (for example, 10%) (step S).
11). If the predetermined amount is increased, it can be determined that the filter 18 is dirty. Therefore, the display control means 24 is switched to the filter cleaning display means 32 in order to prompt the user to clean the filter.
Is displayed (step S12). Thus, it is possible to call attention to cleaning when the filter 18 becomes dirty at a certain degree. Further, it is determined whether or not the initial rotation speed is increased by a second predetermined amount (for example, 16%) which is larger than the first predetermined amount (step S13). In a situation in which the initial rotation speed must be increased by this predetermined amount, the display control means 24 displays a warning on the filter warning display means 33 and stops the combustion operation because the filter 18 is considerably dirty and clogged. (Step S14). In this case, normal combustion cannot be expected if the combustion is continued in the state where the filter is clogged, so the operation is temporarily stopped and the abnormality is awaited by replacing the filter. In step S1, if the filter removal detecting means 19 detects that the filter 18 has been removed, it is determined in step S11 that the removal of the filter has been performed with the initial rotational speed increased by a first predetermined amount (for example, 10%). It is determined whether or not it is not (Step S15), the initial rotation speed is changed to a value increased by a certain amount (for example, 8%), and the display means 32 and 33 are turned off (Step S16). here,
The reason why the initial rotation speed is increased by a certain amount (for example, 8%) is that once in such a state, some soot adheres to the exhaust cylinder and the air supply cylinder in addition to the filter 18 and the fan This is because, since the blowing resistance is increased, the initial rotation speed is increased in advance in consideration of the resistance, and the blowing amount of the fan is stabilized in a short time. In step S16, the display means 3
The reason why the lights 2 and 33 are turned off is that it can be determined that the filter has been cleaned or replaced. In the above embodiment, the number of rotations of the fan is counted up, the number of rotations is increased by a predetermined number to increase the initial rotation number, and the degree of clogging of the filter is determined based on the increased amount. Accurate determination can be made without erroneous determination due to short-term fluctuation of the flow path resistance of the air passage. Further, at this time, the number of times of the increase may not be the amount of increase of the initial rotational speed, and the determination may be made based on the number of times of the increase of the rotational speed of the fan as still another case. As described above, according to the present invention, the state of combustion of the combustion device is determined, and the degree of clogging of the filter is determined in association with the correction amount or the number of rotations for improving the combustion characteristics. Therefore, there is an effect that the degree of clogging of the filter can be more accurately determined. Further, the user can be informed of the degree of clogging of the filter in two stages, a cleaning stage and a warning stage, which is convenient. Further, the initial rotational speed of the blower fan can be increased in accordance with the degree of clogging of the filter, and the amount of blown air can be stabilized in a short time.

[Brief description of the drawings] FIG. 1 is an explanatory diagram of a schematic configuration of a combustion device. FIG. 2 is an explanatory diagram illustrating the operation of the present invention. [Explanation of symbols] 1 Combustion device 4 heat exchanger 5 Burning part (burner) 6. Combustion state detecting means (temperature detecting means) 15 Blow fan 18 Filter 19 Detachment detection means 20 control unit 21 Hot water supply control means 22 Combustion state determination means 23 Fan motor control means 24 display control means 30 Remote controller 31 Operating means 32 Filter cleaning display means 33 Filter warning display means

Continuation of the front page (56) References JP-A-8-270934 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23N 3/08 F23N 5/24 104 F23N 5/26

Claims (1)

(57) [Claims 1] A combustion device which performs combustion by supplying an appropriate amount of air by a ventilation fan through a ventilation filter which removes dust at the time of combustion. Combustion temperature detection means for detecting the temperature of
When the combustion temperature detecting means detects a temperature outside the normal range, the number of rotations of the blowing fan is increased by a predetermined amount, and the number of times the predetermined amount is increased increases the initial rotation number of the blowing fan every predetermined number of times. Motor control means, and a filter cleaning display for prompting the cleaning of the filter when the fan motor control means increases the rotation speed (or initial rotation speed) of the blower fan by a first predetermined amount (or first predetermined number of times). Means and the fan motor control means for increasing the number of revolutions (or the initial number of revolutions) of the blower fan to a second predetermined amount larger than the first predetermined amount (or a second predetermined number larger than the first predetermined number of times). The number of times the filter has been increased by a warning display means for giving an abnormality warning and a filter attachment / detachment detection means for detecting attachment / detachment of the filter Combustion device comprising: a display control means for resetting the sweep display means and said warning display means, by comprising a.