JPS584034Y2 - Kerosene instant water heater - Google Patents

Description

[Detailed explanation of the idea] Kerosene-fired instantaneous water heaters have a gun-type burner, so even if the water flow inside the water heater is detected and the ignition operation is started during hot water supply, there is no pre-purge operation, etc. Yes, it takes some time to ignite.

For this reason, the time from the start of hot water supply to the time when hot water is supplied at a predetermined temperature is longer than with instantaneous gas water heaters.

Additionally, there were drawbacks such as the combustion noise being louder than pot-type combustion or Bunsen combustion.

The present invention was made to solve the above problems, and the main vaporization chamber is installed above the pilot burner, which vaporizes kerosene in the pilot vaporization chamber heated by a positive temperature characteristic thermistor and burns it in the flame hole. The instant water heater has a built-in main burner that vaporizes the fuel and burns it in the flame hole, and a thermostat is installed on the bottom of the main vaporization chamber to constantly maintain the bottom temperature of the main vaporization chamber at a predetermined temperature. The system automatically controls ignition and extinguishment of the pilot burner during hot water supply, improves response characteristics during hot water supply, and reduces combustion noise and after-boiling.

An embodiment of the present invention will be described below with reference to the drawings.

First, let's talk about the configuration. Figure 1 is a schematic diagram of the structure;
FIG. 2 is an electrical circuit diagram.

In FIG. 1, 1 is a pilot burner, 1' is a flame hole of the pilot burner, a pilot vaporization chamber 2, a positive temperature characteristic thermistor 3,
Blower 4 and air pipe 5 that send combustion air to pilot vaporization chamber 2
, a fuel vibro that sends fuel into the pilot vaporization chamber 2, an oil level regulator 7 for stably feeding fuel, a pressure balance pipe 8 that transmits the pressure of the blast pipe 5 to the oil level regulator 7, etc. ing.

9 is a spark plug for igniting the pilot burner 1, and 10 is a claim rod for detecting this flame.

11 is a main burner that heats the vaporization chamber by pilot burner 1, and 11' is a flame hole of the main burner.

12 is a main vaporization chamber, 13 is a burner thermometer that detects the temperature of the main vaporization chamber, and 44 is a burner thermometer that detects the bottom temperature of the main vaporization chamber and controls combustion of the pilot burner.

The rest of the structure is the same as pilot burner 1, and main vaporization chamber 1
A blower 14 that sends combustion air to 2, an air pipe 15, a fuel pipe 16 that sends fuel into the main vaporization chamber 12, an oil level regulator 17 that sends fuel stably, and a blower 15 that maintains the pressure of the air pipe 15 at a constant oil level. It stands out from the pressure balance pipe 18 which is transmitted to the face plate 17.

19 is a spark plug for igniting the main burner, 20
is a flame rod that detects the flame of the main burner 11.

A fuel supply pipe 21 supplies fuel from another tank (not shown) to the oil level regulator 7 and the oil level regulator 17.

22 is a water supply pipe; 23 is a water flow detector 24 that detects the water flow in the water supply pipe 22; for example, a diaphragm body with a built-in diaphragm; 25 is a water governor that adjusts fluctuations in supply water pressure and supplies a constant amount of water to the water heater. be.

26 is a water flow SW that is linked to the water flow detector 24.

27 is a heat exchanger connected to the water supply pipe 22, 28 is a hot water supply pipe, and 29 is a faucet attached to the tip of the hot water supply pipe 28.

Next, the configuration shown in FIG. 2 will be explained.

In FIG. 2, 30 is a power supply, 31 is a main SW, 32 is a heat sensitive element for detecting the temperature of the mounting portion of the positive temperature coefficient thermistor 3 described in FIG. 1, and 33 is a contact point thereof.

44' is a contact point to the burner thermo 44 and the main vaporization chamber 1
When the temperature of the pilot burner 2 reaches a predetermined temperature or higher, it opens and the combustion of the pilot burner 1 is stopped.

34 is a timer, which closes contact 3 for a certain period of time after the start of energization.
5. Close 35'.

36 is a frame controller, and frame rod 1
0 detects the flame of the pilot burner 1, it operates and closes the contact 37.

When contact 35 or contact 37 is closed, the blower
4 is activated.

Further, when the main vaporization chamber 12 shown in FIG. 1 is heated, the contact 13' of the burner thermo is closed, and when the water flow detector 24 detects the water flow in the water supply pipe 22, the water flow 5W26 is closed.

38 is a timer, which closes contact 3 for a certain period of time after the start of energization.
Close at 9.40.

Reference numeral 41 denotes an igniter which is activated when 35' or contact 40 is closed, causing spark plugs 9 and 19 to emit sparks.

42 is a frame controller, and frame rod 1
9 is activated when it detects the flame of the main burner 11, and the contact 4
Close 3.

Next, the operation of the present invention having the above configuration will be explained.

In FIGS. 1 and 2, when the main 5w31 is closed, the positive temperature characteristic thermistor 3 at the lower part of the pilot burner 1 is energized, and the pilot vaporization chamber 2 is heated.

Here, the heating is detected by the heat sensitive element 32.

This closes contact 33, contact 44' is normally open, and energizes timer 34 and frame controller 36, so timer 34 is activated and contacts 35, 35'
is closed, the blower 4 is operated, and combustion air is sent into the pilot vaporization chamber 2 through the blower pipe 5.

As a result, the pressure inside the blast pipe 5 increases. This pressure increase is transmitted to the oil level regulator 7 through the pressure balance pipe 8.

As a result, the fuel is sent to the pilot vaporization chamber 2 through the fuel vibro, where it is atomized by combustion air as it enters there, further vaporized by the heated pilot vaporization chamber 2, and guided to the flame hole 1' of the pilot burner.

At this time, since the igniter 41 is also energized, a spark jumps from the ignition plug 9 to the flame hole 1' of the pilot burner and is ignited.

Next, the flame rod 10 detects that a flame is formed in the flame hole 1' of the pilot burner, and feeds the signal back to the flame controller 36.

This causes the contact 37 to close.

Next, the timer 34 starts energizing and stops its operation after a certain period of time has elapsed, so the contacts 35 and 35' are opened and the energization to the igniter 41 is stopped, and the spark from the spark plug 9 is stopped. Since the contact 37 of the blower 4 is closed, the blower 4 continues to operate, and the pilot burner 1 continues combustion to heat the main vaporization chamber 12, and the burner thermometer contact 13' is closed to complete preparation for hot water supply.

Next, by opening the faucet 29 at the tip of the hot water supply pipe 28, water flows into the water supply pipe 22, the heat exchanger 27, the hot water supply pipe 28, and the faucet 29.

The water flow detector 24 detects this water flow, and the water flow 5W26 is closed.

As a result, the timer 38 and the flow controller 42 are energized, so the timer 38 is activated, contacts 40 and 43 are closed, the blower 14 is activated, and combustion air is sent into the main vaporization chamber 12 through the air pipe 15.

As a result, the pressure inside the blast pipe 15 increases.

This pressure increase is transmitted by the pressure balance pipe 18 to the level regulator 17, which sends the fuel through the fuel pipe 16 to the main vaporization chamber 12, where it is atomized by combustion air and further heated. It is vaporized in the main vaporization chamber and guided to the flame hole 11' of the main burner.

At this time, since the igniter 41 is also energized, the spark plug 19 jumps and ignites the flame hole of the main burner.

Next, the flame rod 20 detects that a flame is formed in the flame hole 11' of the main burner, and feeds the signal to the flame controller 42.

This causes the contact 43 to close.

Next, the timer 42 starts energizing and stops its operation after a certain period of time has elapsed, so the contacts 39 and 40 are opened, the energization to the igniter 41 is stopped, and the spark from the spark plug 19 is stopped, but the blower -14, since the contact 43 is closed, the main burner 11 continues combustion and heats the heat exchanger 27.

This heats the water passing through the heat exchanger 27 and
9. Supply hot water.

Next, when the faucet 29 is closed, the water supply pipe 22 and the hot water supply pipe 28
The water flow detector 24 detects the stoppage of the water flow in the chamber and the water flow 5W26 is opened, so power to the flame controller 42 and the blower 14 is stopped, and the supply of fuel to the main vaporization chamber 12 is stopped, so the main burner 11 is stopped. Combustion stops.

At this time, since the pilot burner 1 continues to burn, hot water can be immediately supplied at the next time of hot water supply.

However, if the pilot burner 1 is burned for a long time with hot water supply stopped, the main vaporization chamber 12 will become hotter than in normal use, and the burner thermo 44 will detect this and the contact 44' will open, causing the pilot burner 1 to stop burning. This reduces the backlash when refilling hot water.

Furthermore, when the temperature of the main vaporizing chamber 12 decreases, the contact 44' closes, and the above operation ignites the pilot burner 1 to maintain the main vaporizing chamber 12 at a predetermined temperature, completing preparations for instant hot water supply at the next time of hot water supply. .

As mentioned above, according to the present invention, even if the fuel is kerosene, Bunsen combustion can be obtained, so the hot water start-up performance is comparable to that of an instantaneous gas water heater, and after-boiling can be prevented by turning the starter burner on and off. It is a useful product that has many advantages such as low combustion noise, compact size, low fuel consumption, and excellent economic efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the main parts of a kerosene-fired instantaneous water heater according to an embodiment of the present invention, and FIG. 2 is an electric circuit diagram used in FIG. 1. 1... Pilot burner, 2... Pilot vaporization chamber, 3... Positive temperature characteristic thermistor, 11...
... Main burner, 12 ... Main vaporization chamber, 4
4... Burna thermo.

Claims (1)

[Scope of utility model registration request] It has a main burner with a main vaporization chamber above the pilot burner that vaporizes kerosene in a pilot vaporization chamber heated by a positive temperature coefficient thermistor and burns it in a flame hole, and controls the combustion of the pilot burner when hot water is not being supplied. A kerosene instantaneous water heater characterized in that a burner thermo is provided at the bottom of the main vaporizing chamber.