JP2521897B2 - Ignition burner device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition burner device of a heating device for rapidly heating an interior of a vehicle or the like.

(Prior art) Conventionally, for heating the interior of a vehicle, the cooling water of the internal combustion engine is taken out by a hot water pipe, and this is passed through a heater body composed of a heater core, a blower, etc., and air is sent to the heater body to heat it. There are used those that perform indoor heating, and those that perform indoor heating by burning fuel with a burner and generating heat quantity irrespective of the internal combustion engine.

(Problems of the prior art) In such a method of utilizing the cooling water of the internal combustion engine for indoor heating, since the temperature rising speed of the cooling water is slow,
It takes time for the heater body to deliver hot air, and the heating function of the heater is lost during that time. Also, in the case of burning fuel separately from the internal combustion engine, kerosene is mainly impregnated into the wick to burn it, and it takes a considerable time to reach the heating temperature, which is not always satisfactory. It is not possible.

Therefore, the present applicant has proposed, as Japanese Patent Application No. Sho 58-165310, a heating device capable of rapidly raising the heating temperature. The ignition burner device used in this heating device is mainly suitable for light oil as a fuel, and an ignition burner device capable of efficiently combusting using another fuel is desired.

(Object of the invention) The object of the present invention was devised in view of the above points,
An object of the present invention is to provide an ignition burner device that can burn fuel with high efficiency by using a fuel such as kerosene, which has a lower calorific value than that of light oil, to quickly reach a heating temperature.

(Summary of the Invention) In order to achieve the above object, according to the present invention, a partition wall disposed on the upstream side of a combustion chamber provided in an air duct, and having a plurality of air introduction holes through which air communicates, A mixing and vaporization promoting device, which is provided upstream of the combustion chamber and downstream of the partition wall with a space between the partition wall and the partition wall, allows gas to flow freely and promotes vaporization of the fuel that has not completely vaporized, and a heating element for vaporizing the fuel. And a nozzle means for premixing air into the vaporized fuel vaporized by the heating device and supplying vaporized fuel for air premixing to both the upstream side and the downstream side of the mixing and vaporization promoting device, An ignition burner device comprising: an ignition device provided in a combustion chamber downstream of the mixing and vaporization promoting device.

(Embodiment) FIG. 1 is a block diagram of a vehicle heating system using an ignition burner device according to the present invention.

In the figure, reference numeral 1 is an air duct for guiding combustion air, and external air is sent by a blower 2. An ignition burner device 4 and a heat exchanger 3 downstream thereof are provided in the middle of the air duct 1. A combustion chamber 41 for burning fuel is provided inside the ignition burner device 4, and a part of the air from the blower 2 is formed in a partition wall 42 facing the air passage.
After passing through 42a and passing through a mixing and vaporization promoting device 43 formed in a honeycomb structure by a ceramic material, the fuel described later is mixed and the vaporization is promoted, and enters the combustion chamber 41 where it is burned and is heated to a high temperature. It becomes combustion gas and goes to the combustion chamber outlet 44. Also, other air sent from the blower 2 is an air intake port.
It is configured such that it enters the combustion chamber 41 through the air inlet 47 from the air inlet 47, merges with the combustion gas, and flows out from the combustion chamber outlet 44 to the heat exchanger 3.

The ignition burner device 4 also includes a heating device 48 for heating and vaporizing fuel such as kerosene supplied from the fuel pump 5, and an ignition device 49 for burning vaporized fuel vaporized by the heating device 48. ing. The heating device 48 includes a fuel inlet 481a, vaporized fuel outlets 481b and 481c, and an air inlet 481d.
And a heating element 482 inserted into the nozzle 481. The fuel inlet 481a is connected to the fuel pump 5 and the air inlet 481d is connected to the air pump 6 via the check valve 7. It is connected. Further, one vaporized fuel outlet 481b provided in the nozzle 481 is opened toward the upstream side of the mixing and vaporization promoting device 43, the other vaporized fuel outlet 481c is opened toward the ignition device 49. ing.
The heating element 482 is a heating coil 482a made of a resistance wire having a positive temperature coefficient in a body made of a ceramic material.
Is embedded, and power is supplied to the heating coil 482a from a terminal 482b.

The ignition device 49 is an ignition element 491 made of a ceramic material.
A heating coil 491a made of a resistance wire having a positive temperature coefficient is embedded in the main body of the heating coil.
By supplying power to 491a, the ignition element 491 is heated.

Next, the operation of the ignition burner device 4 thus configured will be described. The fuel supplied from the fuel pump 5 through the fuel inlet 481a into the nozzle 481 of the heating device 48 is heated and vaporized by the heating element 482, and further the air pump 6
The air supplied through the air inlet 481d from the air is premixed for optimum fuel, and is ejected as vaporized fuel from the vaporized fuel outlets 481b and 481c of the nozzle 481. When the fuel that has entered the heating device is heated by the heating element 482,
Although it is vaporized by receiving thermal energy, not all of the fuel is completely vaporized, and it becomes fine fuel particles, which are carried toward the nozzle together with the vaporized fuel. The vaporized fuel (including unvaporized fuel particles) ejected from the vaporized fuel outlet 481c is ignited by the ignition element 491 of the ignition device 49 arranged in the combustion chamber 41 to form a flame. On the other hand, the vaporized fuel ejected from the vaporized fuel outlet 481b is sufficiently mixed with the air introduced from the air introduction port 42a by passing through the mixing and vaporization promoting device 43, and is further completely vaporized by the heating device 48. The remaining fuel particles are vaporized by the turbulent air flow, further mixed with air, and enter the combustion chamber 41. The vaporized fuel thus mixed with air is ignited by the flame in the combustion chamber 41 to generate a flame, and becomes high-temperature combustion gas and is sent to the heat exchanger 3 via the combustion chamber outlet 44. When combustion starts in the combustion chamber 41, the mixing and vaporization promoting device 43 is heated to a high temperature, but the vaporized fuel is heated when passing through the mixing and vaporization promoting device and is promoted to vaporize to be in a state in which it easily burns. And enters the combustion chamber 41.

The heat exchanger 3 takes in new air from an intake air inlet 12 communicating with the interior of a vehicle requiring heating, and blows out hot air after the new air takes heat from the combustion gas to perform heat exchange.
It has a blower 14 that blows up to 13. The outlet
13 is opened at the outlet of a cooling water heater core 15 which is separately installed for indoor heating. Therefore, the illustrated blower 16, the air conditioner evaporator 17, and the hot water passage 18 are shown.
Is each member of the heater device using cooling water.

Reference numeral 19 denotes a controller, which generates a power generation signal GT from a generator 21 driven by the engine 20 and an operation switch 22.
ON / OFF signal FS, water temperature signal WS from the water temperature switch 23 that detects the engine cooling water temperature, and start signal ST
And a main control unit 191, to which the accelerator opening signal AS is input, a bridge circuit 192 that controls the heating element 482 of the heating device 48 to the vaporization temperature of the fuel, and the ignition temperature of the fuel that vaporizes the ignition element 491 of the ignition device 49. Bridge circuit 193, which is always held by
It is composed of a switch unit 194. The main control unit 191 has a computer configuration having a processing device, a memory, and an input / output interface.

Bridge circuit 192, a heating coil 482a for heating the one side, this and the Wheatstone bridge consisting of resistors r ₁ ~r _3, a comparator 192a for detecting the balancing state of the Wheatstone bridge, the comparator 192a It has a relay 192b that turns on when the output is positive and turns off when the output is negative. The resistance value of the resistor r ₃ is much smaller than the resistance value of the heating coil 482a.

Bridge circuit 193 is set to one side of the heating coil 491a of the ignition element 491, which and the Wheatstone bridge consisting of resistors r ₄ ~r _6, a comparator 193a for detecting the balancing state of the Wheatstone bridge, the comparator 193a It has a relay 193b that turns on when the output is positive and turns off when the output is negative. The resistance value of the resistor r ₆ is much smaller than that of the heating coil 491a.

The switch 194 is a switch that controls ON / OFF of the blower 14.
Switch 194a that controls the power supply to the bridge circuit 193
Switch 19 for controlling the power supply to the bridge circuit 192, 94b
With 4c. 24 is the battery of the power supply, 25 is the key switch,
26 is a starter motor.

Next, the operation of the ignition burner device according to the present invention in the vehicle heating device thus configured will be described.

When the engine key switch 25 is turned on, the vehicle power is turned on, but since the engine 20 is not started, the main control unit 191 keeps all the switches 194a to 194c off, so that the heating device is Does not work. When the key switch 25 is further rotated and a voltage is applied to the starter motor 26 to rotate the engine, the engine 20 starts. Simultaneously with the start of the engine 20, the main control unit 191 turns on the switches 194b to 194c to apply a voltage to the bridge circuits 192 and 193. Thus, in the ignition burner device 4, the heating coil 482a of the heating element 482 of the heating device 48 and the heating coil 491 of the ignition element 491 of the ignition device 49.
a will be heated. Heating coil 4 when voltage is initially applied
Since both 82a and 491a have low temperatures, their resistance values are also low, and the outputs of the comparators 192a and 193a are also positive, so the relays 192b and 193b remain ON, and the heating coils 482a and 491a.
A voltage is continuously applied to and rapid heating is performed. Then, when the temperature of each of the heating coils 482a and 491a reaches a predetermined value, their resistance value also rises to a predetermined value.The voltage applied to the heating coils 482a and 491a also rises and the comparator 192a and The output of 193a is inverted to negative. Therefore, the relays 192b and 193b are turned off, the supply of voltage to the heating coils 482a and 491a is stopped, and the temperature of these starts to drop. And relays 192b and 193b are OF
Because of F, the outputs of the comparators 192a and 193a are positive, the relays 192b and 193b are turned on again, and the heating coils 482a and 491a are turned on.
Is heated. Such an operation is repeatedly performed, and the heating coils 482a and 491a are maintained at the set predetermined temperatures. By such an operation, the heating coils 482a and 491a are kept at a predetermined temperature, and therefore the heating element 482 and the ignition element 491 also have a predetermined temperature. At the same time, the drive sources 51 and 61 of the fuel pump 5 and the air pump 6 are operated by a command from the main control unit 191, the fuel pump 5 and the air pump 6 are operated, and fuel and air are supplied to the nozzle 481 of the heating device 48. Supplied. Therefore, as described above, the fuel is vaporized by the heating element 482, further premixed with the supplied air, ignited by the ignition element 491, and a related operation in the combustion chamber 41 causes a fire. As a result, the combustion gas becomes a high temperature and flows into the heat exchanger 3.

On the other hand, when the engine 20 finishes the starting operation and enters the normal operation, the power generation signal GT from the generator 21 and the operation switch 22
The logical product of the ON signal FS and the ON signal FS is obtained by software in the main control unit 191. As a result, the main controller 191 switches the switch 194.
When a is turned on, the blower 14 starts blowing air. Therefore, the air heated by the heat exchanger 3 from the intake air inlet 12 becomes hot air from the outlet 13 and blows out to start indoor heating immediately after the engine is started.

Next, after the time has elapsed since the engine 20 started operation,
When the temperature of the cooling water rises to the extent that it can be used as warm water for indoor heating, the water temperature switch 23 provided in the engine 20 operates to output the water temperature signal WS, and the main control unit 191 causes the fuel pump 5 to operate.
And the drive sources 51 and 61 of the air pump 6 are instructed to stop the operation of both and shut off the supply of fuel and air. Furthermore, the heating device 48 and the ignition device related to the ignition burner device 4.
49 and the operation of the blower 14 associated with the heat exchanger 3 are stopped, and another blower 16 is operated, and the cooling water heater starts the heating operation as in the past.

Although the present invention has been described above with reference to the embodiment shown in the drawings, the present invention is not limited to what is shown in the embodiment, and various modifications are possible within the scope of the gist of the present invention.
They are not excluded from the scope of the present invention.

(Effects of the Invention) As described above in detail, since the ignition burner device according to the present invention includes the heating device arranged in the nozzle to which the fuel is supplied and connected to the air supply source, The fuel supplied into the nozzle is rapidly heated and vaporized by the heating element, and further premixed with the supplied air for optimum combustion, so that the fuel particles that cannot be completely heated by the heating device are also included. The vaporized fuel that has been vaporized and discharged from the nozzle burns with high efficiency. Therefore, it is possible to obtain an ignition burner device for heating that can perform rapid heating using a fuel having a low calorific value such as kerosene.

[Brief description of drawings]

FIG. 1 is a block diagram of a vehicle heating device including an ignition burner device according to the present invention. 1: Air duct, 2: Blower, 3: Heat exchanger, 4: Ignition burner device, 48: Heating device, 481: Nozzle, 482: Heating element, 49: Ignition device

Continuation of the front page (72) Inventor Yukio Yoshida 8 Satana, Fujisawa City, Fujisawa Plant, Isuzu Motors Co., Ltd. (56) References )

Claims (1)

(57) [Claims] 1. A partition wall provided in an air duct on the upstream side of a combustion chamber and having a plurality of air introduction holes for communicating air, and a partition wall upstream of the combustion chamber and downstream of the partition wall. An open space is provided to allow the gas to flow freely, and a mixing and vaporization promoting device that promotes the vaporization of the fuel that has not completely vaporized, a heating device that has a heating element that vaporizes the fuel, and the vaporization vaporized by the heating device. Nozzle means for premixing air with fuel and supplying vaporized fuel for air premixing to both the upstream side and the downstream side of the mixing and vaporization promoting apparatus, and a combustion chamber downstream of the mixing and vaporization promoting apparatus An ignition burner device comprising: an ignition device;