JPS63172824A - Kerosene hot wafer supplier - Google Patents

Abstract

PURPOSE:To prevent extraordinary combustion such as explosion or the like from occurring by providing control means in which an air flow rate sensor is provided and which actuates an electromagnetic pump (VP) and an igniter (LG) after the blast quantity of a fan motor (FM) reaches a predetermined air flow rate, thus shifting the apparatus to combustion. CONSTITUTION:When a fan motor (FM) 6 has been locked for some reason or another, an air flow rate sensor 16 does not detect the air flow rate. Therefore, the VP and IG drive circuit 15 of a control part 18 does not actuate VP 4 and IG 8, and kerosene is not sprayed still in an air deficient state. As described above, after the blast quantity from the FM 6 has reached a predetermine flow rate, the VP 4 and IG 8 actuated. By this organization, if there is no air flow rate from the FM 6, the spraying of kerosene is not carried out, and hence no unburnt gas is stored in a combustion chamber 5, but even when the locking of the FM 6 is released and air is abruptly supplied into the combustion chamber, generation of any dangerous condition such as explosion or the like can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an oil water heater used for domestic water heaters and heating equipment.

BACKGROUND OF THE INVENTION In recent years, petroleum hot water heaters have become increasingly popular, and are becoming an indispensable part of daily life, and are increasingly being used for multiple purposes.

An example of the conventional oil water heater mentioned above will be described below with reference to the drawings.

FIG. 4 shows a longitudinal sectional view of a conventional example. 1 is a heat exchanger equipped with a hot water supply port 2 at the top and a water supply port 3 at the bottom; 4 is an electromagnetic pump (hereinafter referred to as VP) that pumps out kerosene;
5 is a combustion chamber surrounded by the heat exchanger 1; 6 is an unmoke (hereinafter referred to as FM) for feeding combustion air into the combustion chamber 5;
7 is a nozzle through which kerosene supplied from VF6 is sprayed, 8
9 is an igniter (hereinafter referred to as IG); 9 is an ignition electrode that generates a spark discharge by a high voltage from IGB to ignite the kerosene sprayed from nozzle 7; and 10 is a controller that controls VF 6, FM 6, and IGB.

Next, FIG. 5 shows a circuit block diagram of a controller 100 of a conventional oil water heater. In the figure, 11 is an AC power supply, 12 is an operation switch that supplies the AC power supply 11 to the subsequent circuit, and 13
14 is an FM drive circuit that operates the FM6 at the same time as the operation switch 12 is turned on, and 14 is a pre-purge circuit that measures a predetermined time based on a signal from the FM drive circuit 13 and sends a signal to the next circuit after a predetermined time. , 15 is a VP that turns on VF6 and IGB by a signal from the bripurge circuit;
This is an IG drive circuit. FIG. 6 is a sequence diagram showing the process of ignition of a conventional oil water heater.

In the figure, at the same time as the operation switch 12 is turned on, the FM drive circuit 13 operates the FM6, and at the same time air is sent into the combustion chamber 5, the pre-barge circuit 14 is activated by a signal from the FM drive circuit 13 to control the pre-barge time. Tp is calculated by σ(II), and when the rebarge time TP ends, a signal is sent to the Vp% IG drive circuit 15.
Operate Ga. Then, kerosene is sprayed from the nozzle 7 into the combustion chamber 5 by the VP4, and at the same time, a spark discharge is generated at the tip of the ignition electrode 9 connected to 1G8, and combustion of the kerosene starts.

Problems to be Solved by the Invention However, in the above configuration, after FM6 operates, VP4
, the pre-barge time TP until IG8 starts operating.
Because time is controlled, even if FM6 is temporarily locked due to a foreign object and air is not blown, kerosene will be sprayed from nozzle 7 after the pre-barge time TP, and unburnt gas will be combusted due to lack of air. It was stuck in room 5. This is repeated by turning the operation switch 12 ON-OFF, and for some reason, the FMS lock is released and air suddenly starts blowing and air is supplied into the combustion chamber 5 where unburned gas is accumulated. The combustion occurred rapidly, and in some cases, an explosion occurred.

The present invention has been made in view of this problem and provides an oil water heater that does not cause abnormal combustion such as explosion.

Means for Solving the Problems In order to solve the above problems, an air volume sensor is provided, and after the FM air flow reaches a predetermined air volume, control means is provided to operate VP and IG and shift to combustion. It is.

Effect The present invention has the above-described configuration, so that due to some reason, the FM
If the operation is stopped, the control means will not start the operation of the VP and IG because the airflow sensor will not detect the airflow, and unburned gas will not accumulate in the combustion chamber, resulting in a dangerous situation such as an explosion. Idiots do not occur.

EXAMPLE A petroleum water heater which is an example of the present invention will be described below with reference to the drawings. Note that parts that are the same as those in the prior art are given the same numbers and their explanations will be omitted. In FIG. 1, FIG. 2, and FIG. 3, 16 is an air volume sensor that detects the air volume blown from the FM 6, and 17 is a signal received from the air volume sensor 16 and sent to the VP, IG drive circuit 15. An air volume detection circuit 18 that sends a drive enable signal is a control unit consisting of an FM drive circuit 13, an air volume detection circuit 17, and a vp% IG drive circuit 15.

Next, the operation will be explained using FIG. 3.

At the same time as the operation switch 12 is turned on, the FM drive circuit 13 operates the FM 6. Next, the air volume sensor 16
When the airflow from M8 is detected, a signal is sent from the airflow detection circuit 17 to the VP and IG drive circuit 15, and VP4 and IG8 are operated. Thereafter, combustion of kerosene begins through the same process as in the conventional example.

If the FM6 is locked for some reason, the airflow sensor 16 does not detect the airflow, so the vP and IG drive circuit 15 of the control unit 13 does not operate the VP4 and IGB, leaving the air insufficient. Kerosene will not be sprayed.

As described above, according to this embodiment, VP4 and IG8 are operated after the airflow from the FMS reaches a predetermined airflow, so if there is no airflow from the FMS, kerosene will be sprayed. Therefore, no unburned gas accumulates in the combustion chamber 5, and even if the FMS is unlocked and air is suddenly supplied into the combustion chamber, dangerous evacuations such as explosions can be prevented.

In addition, when the air volume decreased due to a defect in FM6, soot was generated or the ignition noise became louder due to the lack of air in the past, but in this example, if the air volume is low, VP4, IG
8 does not operate, so the kerosene water heater will not be operated with a large amount of soot generated or with loud ignition noise.

Effects of the Invention As described above, the present invention detects the fan motor's air flow and operates the electromagnetic pump and igniter.■ If there is no air flow due to the fan motor being locked, etc. (Since the gas is not sprayed and unburned gas does not accumulate in the combustion chamber, even if the fan motor is unlocked and air is suddenly sent into the combustion chamber, there will be no danger of dryness or other dangerous conditions.) It can be avoided.

■ 7. Due to a defective unmoke, the electromagnetic pump and igniter will not operate even if there is a lack of air, so the kerosene water heater will not be operated without producing a large amount of soot or making a loud ignition noise.

It is possible to produce a dog-like effect such as

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of an oil water heater that is an embodiment of the present invention, Fig. 2 is a block diagram of the oil water heater, and Fig. 3 is a timing chart showing the process of ignition of the oil water heater. , FIG. 4 is a longitudinal sectional view of a conventional oil water heater, FIG. 5 is a block diagram thereof, and FIG. 6 is a timing chart showing the process of ignition of the oil water heater. 1... Heat exchanger, 4... Electromagnetic pump,
5... Combustion chamber, 6... Fan motor,
7...nozzle, 8...igniter, 9...
...Ignition electrode, 16...Air volume sensor, 17
. . . Air volume detection circuit, 18 . . . Control unit. Name of agent: Patent attorney Toshio Nakao and 1 other person5-
j! ! Transfer 6- Fan motor 7- Nozzle 8- Ebun 6 9-・-E dog electric food I6- Wind pressure sensor 18- % I+ 411 part Fig. 1 Fig. 2 Fig. 3 Fig. 5- Combustion chamber 6- Fan motor 7 - Nozzle! ? -,! , Jengukan 9-, Uwainudenkashi 1O-II 1j11 Todoroki No. 4121 5 '16 Figure 5! 2 operation switch

Claims (1)

[Claims] The fan includes an electromagnetic pump that supplies fuel into a combustion chamber, a fan motor that sends combustion air, an igniter that ignites the fuel supplied by the electromagnetic pump, and an air volume sensor that detects the air volume from the fan motor. A petroleum water heater comprising a control means for operating the electromagnetic pump and igniter after the amount of air blown from the motor reaches a predetermined amount.