JP2530136Y2 - Variable spray oil burner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable-spray-volume petroleum burner used for domestic water heaters, bath kettles with water heaters, and the like.

[0002]

2. Description of the Related Art As a conventional example which is technically closest to the present invention, a first electromagnetic pump, a second electromagnetic pump, a return type nozzle, and an oil return pipe from the return type nozzle are provided in the middle. There is a variable spray oil petroleum burner having an oil path shown in FIG.

[0003]

However, in such a conventional example, in order to prevent the oil in the oil tank from leaking from the tip of the nozzle by the head during the stop of the pump, the oil return pipe must be provided in the middle of the oil return pipe. An oil solenoid valve is provided in the tank, and the solenoid valve is closed during stoppage to prevent oil from flowing back from the oil return path of the return nozzle, and a first electromagnetic pump (hereinafter referred to as "low pressure pump"). Also, a valve for shutting off the oil suction side and the oil discharge side of the pump when the pump is stopped is provided inside the second electromagnetic pump (hereinafter, referred to as “high pressure pump”). The oil in the oil supply pipe connecting the oil discharge side of the high pressure pump and the oil suction side of the high pressure pump and the oil in the oil return pipe from the outlet of the oil solenoid valve connected to the oil supply pipe are closed, When the temperature of the pipe rises, the hydraulic pressure in the pipe also becomes abnormal. Elevated, thereby spraying the oil amount significantly above a predetermined spray amount at the next burner ignition, thereby disadvantageously generating black smoke.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems. An oil bypass pipe for connecting an oil suction side and an oil discharge side of a low-pressure pump is provided.
An object of the present invention is to solve the above problem by providing an oil solenoid valve in the middle.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.
First, the configuration will be described. Reference numeral 1 denotes a low-pressure pump, the oil suction side of which is connected to an oil tank 5 via an oil feed pipe 6-1. The oil discharge side of the low-pressure pump 1 is connected to the oil suction side of the high-pressure pump 2 via an oil feed pipe 6-2.

The oil discharge side of the high-pressure pump 2 is connected via an oil feed pipe 6-3 to the oil forward path 8 side of the nozzle holder 3 having an oil forward path 8 and an oil return path 9 inside. A return type nozzle 4 is connected to the tip of the nozzle holder 3. The oil return path 9 of the nozzle holder 3 is connected via the oil return pipe 7 in the middle of an oil feed pipe 6-2 connecting the low pressure pump 1 and the high pressure pump 2. In the middle of the oil return pipe 7, the first solenoid valve 10
And the pressure sensor 11 are connected. The controller 12 receives the temperature, flow rate, and the like of the pressure sensor 11 and a water heater (not shown) as inputs, and calculates and calculates the low-pressure pump 1.
To the high-pressure pump 2 and the oil solenoid valve 10. The second solenoid valve 13 is installed in the middle of a bypass pipe 14 provided in parallel with the low-pressure pump 1.

[0007]

Next, the operation will be described. The oil sucked from the oil tank 5 by the low pressure pump 1 is pressurized here and
, And further pressurized by the high-pressure pump 2, supplied to the return nozzle 4, partly sprayed, and the remaining oil passes through the first oil solenoid valve 10 to connect the low-pressure pump 1 and the high-pressure pump 2. Is returned in the middle of the oil feed pipe 6-2.

When the burner is stopped by the burner stop signal, the low-pressure pump 1 and the high-pressure pump 2 are stopped, and the first oil solenoid valve 10 is closed. The second oil solenoid valve 13 provided in the pipe 14 is opened. That is, the first oil solenoid valve 10
Opens almost simultaneously when the low-pressure pump 1 and the high-pressure pump 2 move, and closes almost simultaneously when they stop. The second oil solenoid valve 13 is controlled to be closed almost simultaneously when the low-pressure pump 1 and the high-pressure pump 2 move, and to be opened almost simultaneously when stopped.

[0009]

As described above, according to the present invention, a low pressure pump that sucks oil from an oil tank and discharges a predetermined amount of oil, and an oil that is sent from the low pressure pump,
A high-pressure pump for pressurizing to a high pressure, an oil feed pipe connecting each of the return-type nozzles, an oil return pipe connected from the return nozzle to an oil feed pipe between the high-pressure pump and the low-pressure pump, and halfway through the oil return pipe , A first oil solenoid valve provided in the low pressure pump, a bypass pipe for bypassing the oil suction side and the oil discharge side of the low pressure pump, and a second oil solenoid valve provided in the middle of the bypass pipe. At the time of the next burner ignition by preventing the oil pressure in the oil feed pipe connected from the oil discharge side of the low pressure pump to the oil suction side of the high pressure pump and the oil in the oil return pipe connected thereto to increase. Thus, an effect that abnormal combustion due to the influence of the residual pressure can be prevented can be obtained.

[0010]

The same effect can be obtained by providing a throttle mechanism 15 in the middle of the bypass pipe 14 instead of the second oil solenoid valve 13 described above. In this case, the aperture mechanism 15
The orifice, venturi, thin tube, or needle valve may be used to adjust the degree of throttling. Also, the bypass pipe 14 is not necessarily the low pressure pump 1
It is not necessary to provide it outside, and it may be processed inside the low-pressure pump 1.

[0011]

When the burner is stopped by a burner stop signal, the low-pressure pump 1 and the high-pressure pump 2 are stopped, and the low-pressure pump 1, the high-pressure pump 2 and the first oil solenoid valve 10 are stopped.
Between the bypass pipe 14 and the throttle mechanism 15
Is returned to the suction side of the low-pressure pump 1, so that the pressure in this portion does not increase.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a view showing another embodiment of the present invention.

FIG. 3 is a diagram showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 first electromagnetic pump 2 second electromagnetic pump 3 nozzle holder 4 return nozzle 5 oil tank 6 oil feed pipe 7 oil return pipe 8 oil forward path 9 oil return path 10 first oil electromagnetic valve 11 pressure sensor 12 Controller 13 Second oil solenoid valve 14 Bypass pipe 15 Throttle mechanism

Claims (2)

(57) [Scope of request for utility model registration] 1. A low-pressure first electromagnetic pump connected to an oil tank, a high-pressure second electromagnetic pump for supplying oil to a return nozzle, a return nozzle, and the first and second pumps from the return nozzle. Spray constituted by a first oil solenoid valve provided on an oil return pipe to an oil passage between the second electromagnetic pumps, which opens almost at the same time as each of the electromagnetic pumps moves and closes almost at the same time as it stops. In the variable-volume petroleum burner, a bypass pipe that connects the oil suction side and the oil discharge side of the first electromagnetic pump is provided, and in the middle of the bypass pipes, the electromagnetic pumps close almost at the same time as the electromagnetic pumps move, A variable-spray-volume petroleum burner, comprising a second oil solenoid valve that opens almost simultaneously when stopped. 2. A variable spray oil petroleum burner according to claim 1, further comprising a bypass pipe connecting an oil suction side and an oil discharge side of the first electromagnetic pump, and a throttle mechanism provided in the middle of the bypass pipe. A variable spray oil burner characterized by being provided.