JPS6064020A - Combustion-type heater for vehicle - Google Patents

Abstract

PURPOSE:To obtain clean heating and defrosting of window panels by rising the temperature of air for heating through heat exchange by catalytic combustion of intake air and fuel in a heater case and blowing the combustion gas against the outside surfaces of the window panels. CONSTITUTION:When a carrier 23 having a positive thermal resistance coefficient is energized by actuation of a switch 62, catalyst in a reactor 2 is rapidly heated, and a blower 3 and an ultrasonic wave generator 63 are driven to send air and fuel 46 to a reduced portion 11c of an intake cylinder 11, in which they are mixed and then supplied into a reactor 2. After catalytic combustion therein, the combustion gas is blown through an exhaust cylinder 13 along the outside surfaces of window panels for defrosting thereof. At the same time, air fed through a blower 59 absorbs the combustion heat through a heat exchanger 5 and then is introduced through a duct 58 into the passenger compartment. With such a construction, as unburned carbons and the like are eliminated from the combustion gas, defrosting with no fear of contamination of window panels can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle I4 type heater capable of heating the interior of a vehicle 13 and deicing the outer surface of a vehicle glass.

[Conventional technique (11) Conventionally, 1i7 of automobiles in winter 11JI etc.) lnoS
2. Description of the Related Art As a device, a hot water heater is known, which uses the cooling water of an automobile engine as a heat source to heat the interior of a vehicle. However, this hot water heater does not work well when starting the engine, such as during the coldest season.
It took a long time for the engine coolant to warm up sufficiently, causing problems with the immediate effect of heating. In addition, with the recent trend toward lower ffa H in diesel engine vehicles, there has been a problem that the engine cooling water temperature rises sufficiently not only when the engine is started but also when the engine is under low load, resulting in a lack of heating capacity.

Therefore, in order to improve the immediate effect and heating capacity, a combustion type heater for a vehicle was devised that heats air by burning light oil or the like.

On the other hand, in extremely cold seasons or in cold regions, car window glass may freeze, and in this case, the method of blowing warm air generated by the λ1.11 ice type heat or combustion type heat from the inside of the window glass is recommended. However, because it takes time for the ice to melt, the user had to pour separately boiled water over the outside surface of the window glass with a baguette to thaw the ice.

Therefore, the present inventors developed a high-temperature combustion heater υ.
We considered a method of blowing F scum onto the car window glass to melt the ice, but in this case it is possible to melt the ice.
However, carbon etc. in the exhaust gas adheres to the window glass,
There was a problem in that visibility deteriorated, which was a major obstacle to realizing this.

[Purpose of the invention]

The present invention was developed in view of the above-mentioned problems, and unlike conventional combustion heaters, the present inventors have discovered that, unlike conventional combustion heaters, the present invention eliminates the generation of non-It and burnt carbon in the combustion exhaust gas through a catalytic reaction.
By devising a combustion type heater equipped with a reactor that can prevent the generation of harmful substances such as IC, NOx, etc., and directing the exhaust gas from this combustion type heater to automatic window glass,
Annoying? The purpose is to melt the ice that has adhered to the window glass in a short time without requiring any additional work, and every time the window glass is dirty.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the drawings.

Fig. 1 shows the internal structure of the combustion type heater of the present invention. A heater case 1 having an exhaust port IB, a catalytic reactor 2 provided in the case 1, a blower 3 attached to the intake port IA of the case L, and a combination of the blower 3 and the reactor 2. It consists of a fuel supply device 4 disposed in the middle, and a heat exchange mechanism 5 including a heat exchange section 51 and a blower (7ζ56) provided in the reactor 2.

The heater case 1 has a large diameter portion 11Δ, a tapered portion 11B,
An intake cylinder 11 consisting of a small diameter part 11c, 1) one cylinder 13 having the same diameter as the small diameter part 11G before intake, provided between the intake pipe 11 and the exhaust pipe 13, and provided on the lower surface shown in the figure and the two sides shown in the figure. A large number of small ventilation holes 151 and 153 are formed, for example, in a matrix, and the reactor tube I has the same diameter as the exhaust tube 13.
5, and these parts are connected in series to form a cylindrical duct shape. The intake air DI of the intake cylinder 11 +7
ii! 2, a disc-shaped lid plate 17 is fastened around the periphery of the intake hole 171 constituting the intake port 1Δ, and the taper portion 1113 has slits 71 and 181 and a deflection plate 182 radially arranged around it. Disc-shaped fixed vortex generation plate 18 provided
is provided.

In the present embodiment, as shown in FIG. 2, the reactor 2 is formed with a large number of axial ventilation holes 21 having a rectangular cross section and a large number of through holes 21 that extend in the axial direction of the heater case 1 when installed. A cubic or rectangular honeycomb shape or It exhibits a matrix shape and has a large positive tAl 1i
A monolith carrier 23 made of (PTC ceramic) having resistance characteristics (PTC characteristics), conductive layers 24 and 25 formed by thermal spraying or the like on both end surfaces of the 11 bodies 23 in the axial direction, and It consists of platinum, palladium, and other oxidation catalysts supported on the inner wall 21Δ of the ventilation hole 2■. This carrier 23 is provided 15 in front of the reactor,
The stay 1 is provided with a hole corresponding to the shape of the carrier 23.
55 and 157 to form a reactor ft.
It is taken within fNs (=J is taken.

Further, conductive wires 27 and 28 are connected to the conductive layers 24 and 25 as shown in No. 11i'l.

The blower 3 has a motor mounting (=J hole 172) provided in the center of the lid plate 17 of the heater case with a morph housing 3I.
The inside is inserted and Solange! 71 (32) consists of a motor 33 fixed to the cover plate 17 with screws 34, and an axial blower fan 35 attached to an output shaft 36 of the motor 33 protruding into the intake cylinder ll.

The fuel supply device 4 includes an ultrasonic vibrator 41 for atomizing liquid fuel and a liquid fuel supply mechanism 4G. The ultrasonic transducer 41 includes a cylindrical base 42 having a flange 42Δ around its outer periphery, electrode plates 43 and 43 adhered to both sides of the base 42 so as to sandwich the base 42, and one of the electrode plates. 43
electrically insulating plates 44, 44 stacked on both sides of the board, and a resonator 45, which is a horn, adhered to one electrically insulating plate 44.
The flange portion 42 is configured by integrating the flange portion 42 in series.
A is fastened to an annular plate-shaped flange 19 with a ventilation hole 19A welded to the inner circumferential wall of the intake cylinder 11 with a hinge 19B, and is installed in the intake cylinder 11 for the same purpose.

Liquid fuel 1'-1 supply (imaginary 46 is the same as described above) is formed from the tip 45A of the tail portion 45 to the axis lf), and the tip Mli,
l opening is a small hole I provided at the center of the vortex generating plate 18.
83 and has a side opening opening to the side of the resonance part, and the tip thereof is connected to the fuel passage 47.
It consists of a fuel pipe 48 that is hermetically joined to the side opening of the heater case 7 and protrudes into the heater case 1, and a fuel pump (not shown).

The heat exchange mechanism 5 includes a heat exchange section 51 consisting of the direct vent hole 22 formed in the carrier 23 of the catalyst No. 611 and the small vent holes 151 and 153 formed in the reactor νi15, and these small vent holes 151. 153, an introduction duct 58 that introduces heated air into the vehicle interior, and a ventilation mechanism 56 that blows air from the ventilation duct 57.

Motor 33 of the blower 3, motor 59A of the blower 59
,,fl The electrode plate 43 of the sonic vibration small 41, the fuel pump (not shown), and the 1U body 23. This is done by an electric circuit 6 made of -F cotton.

FIG. 3 shows the combustion type heater shown in FIG. 1 installed in a moving vehicle.
It is partitioned from a vehicle compartment 72 by a partition wall 8, and the combustion type heater is installed in the engine room 71 so that the heater case 1 is approximately horizontal and the blower 3 is 1) IJ. The introduction duct 58 of the heat exchange mechanism 5 is connected to an opening 74H provided in the middle of a ventilation duct 74 of an automobile air conditioner, and a damper 8 for opening and closing the opening 74a is connected to the opening 74H.
0 is provided. The ventilation duct 74 is a ventilation blower lower 41 installed to send air to the chest area of the passenger.
A foot blower lower 43 provided to blow wind to the feet of the X passenger, a desorask blower lower 42 provided to blow wind to the inner surface of the front glass 73, and a ventilation duct 7.
dampers 74G and 747 for switching the mode of the air outlet from these air outlets.

FIG. 4 shows a system diagram of the air conditioner, and the ventilation duct 74 includes an inside air inlet 82 that introduces inside air into the outside air inlet 8 that introduces outside air from the automobile, and these inlets 81 .
An inside/outside air switching damper 83 for opening and closing 82 is provided,
The air introduced through the inlet ports 81 and 82 is blown downstream by the centrifugal blower 84. Downstream of the centrifugal blower 84, there is an evaporator 85 that evaporates the compressed refrigerant of a refrigeration system (not shown) and cools the blown air, and an evaporator 85 that uses the cooling water of the automobile engine as a heat source to heat the blown air. 1
The heater cores 86 are sequentially arranged. A bypass path 87 for blowing air is provided on the side of the heater core 86, and by changing the amount of air passing through this bypass path 87 and the amount of air passing through the heater core 86, the mixing ratio of cold air and hot air can be changed. A mix damper 8B is provided for adjusting the pressure of IA↓.

As can be seen from FIG. 4, the combustion heater inlet duct 58 is connected to the ventilation duct 74 on the downstream side of the heater core 86 and in front of each outlet (741, 742, 743).

In Fig. 3, the exhaust gas of the combustion type heater fa l 3 a
A +J, JJI gas tank 76 is connected to the exhaust lower 51 which opens at the ji, and the exhaust gas is discharged to the outside of the vehicle through an opening end 76a provided under the floor. In addition, the exhaust ID 751 includes the exhaust duct door 6.
A blow-off duct 75 arranged above the engine room 71 is connected to the blow-off duct 75.
1752 protrudes from the opening 7a on the upper surface of the front part of the vehicle body, and is provided with a hole (=J) so that the exhaust gas is blown from the lower part to the upper part of the outer surface of the windshield 73. A damper 77 is installed to switch the flow of exhaust gas to either the exhaust duct 76 side or the blow-off duct 75 side.

The damper 77 and the damper 70 are each driven by drive solenoids 102 and 103 shown in FIG. - It is activated and deactivated by turning on and off the thermoswitch 100 and the thermoswitch 101 installed in the middle of the engine cooling water piping or on the heater core 8G.

Next, Honji hi! with the above configuration! ! The operation will be explained based on an example. First, when the switch 62, which is installed near the driver's seat control panel and is manually operated, is turned on, the carrier 23 having a positive temperature resistance coefficient is energized, and rapidly reaches the temperature J: at which the set catalyst becomes active. is heated to. On the other hand, the morph 33 of the blower 3 also rotates, and the blower fan 35 causes the cover plate 1 to
7 intake hole 171 to the heater mode 1 intake ft.
Inhale into 1i 11. The intake air is an ultrasonic vibrator 41
passing through the ventilation hole 19A of the flange 19 while cooling the
A swirling flow is created by the vortex flow generation plate I8 installed in the intake tlti11, and a vortex flow is created within the small diameter portion 11c of the intake cylinder.

The ultrasonic vibrator 4I atomizes the fuel sent from the fuel pump (not shown) to the tip of the resonant part 45 by energizing the electrode plate 43 via the ultrasonic oscillation circuit 63 when the switch 62 is turned on. The atomized fuel is uniformly mixed by the swirling flow generated by the vortex plate 18 and is supplied to the catalytic reactor 2 while being vaporized. The gas is brought into contact with the oxidation catalyst on the wall of the axial vent hole 21 in the reactor 2, and when the reaction temperature is reached, the fuel is oxidized at a relatively low temperature, becoming combusted IJF gas, and sent into the exhaust stack 13.Switch 62 is turned on, the blower 59 of the heat exchange mechanism 5 is also driven, and the air, which is the fluid to be heated, passes through the blower duct 57 and the small ventilation hole 151, and passes through the orthogonal ventilation hole 22 of the 1111 medium carrier 23, and the small air blower 59 is driven. Air is blown from the ventilation hole 153 to the introduction duct 58, and is blown out from the duct 58 to a heating target area such as the passenger compartment of an automobile.

Here, when the automobile engine cooling water temperature is low and has not reached the predetermined temperature, the thermoswitch]01 is closed;
The solenoid 103 is activated at the same time as the switch 62 is turned on.
This solenoid 103 opens the damper 80,
Warm air is blown into the ventilation duct 74 of the air conditioner.

At this time, if the air conditioner is switched to the heater mode, the dampers 746 and 747 control the ventilation to the defroster blower lower 42 and the ventilation blower lower 41, respectively.
, so that the warm air introduced from the opening 74a is blown out from the foot blowing lower 43 toward the feet of the occupant.

Also, when the air conditioner is in defroster mode 1', damper 7
46, the temperature introduced from the opening 74a is switched to be blown out only from the defroster blow-off lower 42, and warm air is blown out from the defroster blow-off lower 42 onto the inner surface of the windshield 73, making it possible to prevent fogging. Become.

When the combustion heater switch 62 is turned on, warm air is blown out from the foot blower lower 43, making it possible to immediately heat the vehicle interior and defog the lid and glass.

Note that when the engine coolant temperature reaches a predetermined temperature I, the thermoswitch 101 opens, and the electric circuit of the solenoid 103 and the combustion type heater is turned on. //l In order to cut off the energization of G-\, the fuel pump c''(・:'stops °ζ After stopping the supply of fuel pump 1'1, the ultrasonic vibrator 41 Ca1 stops operating,
The supply of electricity to the carrier 23 is stopped, the blower 34.59 is also stopped, and the combustion type heater is stopped. At the same time as the blower 59 stops, the solenoid 103 is de-energized, so the damper 80 closes the opening 1'' portion 74a.

On the other hand, if the combustion heater is in operation and there is ice on the outer surface of the U1 glass 73, the temperature of the windshield 73 is low and the thermosui knob OO is closed, so the damper 77 is switched to the solid line position in FIG. 3 by the solenoid L102, the exhaust gas of the combustion type heater is introduced into the blowout die 75, and hot combustion 1 NOF gas is blown out from the blowout lower 52 onto the outer surface of the sont glass 73. be done. Therefore, the ice on the outer surface of the float glass 73 that is blown with the high-temperature exhaust gas immediately begins to melt. At this time, since the exhaust gas undergoes a catalytic reaction as described above, unburned carbon and co, trc are present in the exhaust gas.

Since it does not contain harmful substances such as NOx, the ice can be thawed without staining the outer surface of the windshield 73. The melted ice is removed by operating the car's wipers, making it possible to clearly see the outside surface of the windshield 73. When the temperature of the glass 73 rises to a predetermined temperature, The switch 100 opens to cut off the current to the solenoid 102, and the damper 77
Switching to the dotted line position in the figure, the exhaust gas passes through the exhaust duct 7G and is discharged from the lower part of the vehicle to the outside.

Next, a second embodiment of the present invention will be described.

In the second embodiment, as shown in FIG. 6, an exhaust duct 7G is disposed under the floor of the vehicle from near the front tires to near the rear tires, and a lower blowout duct 66 is provided under the floor near the rear tie-1. There are openings 1" and 7Gd in the middle of this 1st F air duct 76, below the front pix seat 90 and the rear seat 9, respectively, One part 7 (iC, 76d) has a heat exhaust chamber 92 hollow inside made of a key material such as a metal with good heat conduction.
．． 93 is connected.

The heat exhaust chambers 92.93 are embedded inside the seats 90.91, and have openings 76c, ? (The damper 94.95 installed in the id is rotated, and the exhaust gas in the exhaust duct 76 is introduced into the heat exhaust chamber 92.93 to warm the seat 90.91.) ing.

In addition, the air outlet from the exhaust duct 7G +−i 7 G b , −
1'-141 Branches from near the rear tire and blows out duct 9
G is provided, and its air outlet 96a opens on the upper surface of the rear part of the vehicle body.
1! Exhaust gas is blown out.

Note that the damper 94.95 is driven by a temperature switch and a solenoid (not shown) embedded inside the seat 90.91. In other words, until the temperature inside the seat 90.91 reaches a predetermined value, the solenoid drives the damper 90.91 and exhaust gas is introduced from the opening 76C17Gb until the temperature inside the seat 90.91 reaches the predetermined value. , the damper 90.9I closes the opening 76.
c, 76d is now closed.

The damper 98 is driven by a temperature switch and a solenoid (not shown) attached to the rear window 97. In other words, when the rear window 97 temperature is low and ice is forming, the damper 98 switches to the solid line position in Figure 6 and introduces the waste to the blowout duct 9G side, so that the rear window 97 temperature reaches a predetermined temperature. When the damper 9B is raised, the damper 9B switches to the position shown by the dotted line in FIG.

In this embodiment, when the combustion heater is activated, the damper 77 first switches to the solid line position shown in FIG. Introduce 1]F gas to the 77 side,
The seat 90.9I is heated and the rear window 9 is thawed.

The present invention is not limited to the above embodiments, and various modifications as described below are possible.

(1) Combustion type heaters with a catalytic reactor are not limited to the embodiments described in -, but have a case with a double structure consisting of a cylinder and an outer part, so that the air infiltrated through a single intake port is A part of the air is sent into the gap between the inner cylinder and the outer cylinder, where it is exchanged with heat and turned into warm air, while the other part is fed into the 1+6 reactor and turned into combustion air. The invention can be implemented similarly.

(2) In order to supply warm air into the vehicle interior, the combustion type heater introduction duct is connected to the ventilation duct 74 of the existing air conditioner, and warm air is supplied from the foot outlet IJ 743 and the defroster blower lower 42 of the air conditioner. However, a dedicated duct and air outlet for the combustion heater was installed independently of the air conditioner to allow air to flow inside the vehicle. It is also possible to blow out the wind.

(3) Dump truck 80.98 was installed on solenoid I glass 73 and rear window 97'/A! Instead of a temperature-activated switch, it is also possible to use an optical sensor that detects the altitude, the transparency of the window glass, etc., and its control circuit to drive the device at 10°C. Also damper 80.
98.77.7Gc, 7fid's Kugu Yuator is not limited to a solenoid, but can also use a diaphragm operated by negative pressure from the intake manifold of a gasoline engine car, a servo motor, etc.

(4) In the second embodiment, the rear window 97 is de-frosted after the windshield 73 is de-frosted. (It is also possible to install a blow-off duct to defrost the windshield 73 and the rear window 97 at the same time.)

(5) In addition to the windshield 73 and the rear window 97, if necessary, one window [
It goes without saying that blowing gas to melt the ice is a good idea.

(6) It goes without saying that the damper 80.98 for introducing exhaust gas may be manually operated by the user as necessary.

〔Effect of the invention〕

As described above, since the JJI gas is blown onto the outer surface of the automobile window glass covered with ice, 11% of ice can be produced in a short time without staining the surface of the glass window.

Furthermore, since the reactor causes the fuel to undergo a catalytic reaction, it is possible to prevent the generation of harmful substances such as carbon, Co, IC, NOx, etc. in the JJt gas, which is bad in terms of environmental hygiene.

Furthermore, prime or gas phase fuel is ignited and burned in a reactor,
Since the blown air is heated, warm air can be obtained immediately after the heater starts operating, making it possible to quickly heat the vehicle interior even when the engine is started in the coldest months.

[Brief explanation of drawings]

The drawings all show embodiments of the present invention. Figure 1 is a sectional view of a combustion heater, Figure 2 is a perspective view of a catalytic reactor, and Figure 3 shows a combustion heater connected to an automatic J11 air conditioner. , Figure 4 is a system diagram of the air conditioner, Figure 5 is an electric circuit diagram for driving the dampers 77 and 80, and Figure 6 is the second embodiment. FIG. 2 is a cross-sectional view showing the arrangement of the exhaust duct and the blow-off duct I. ■...Heater case, LA...Intake port, 5...Reactor. 4...Fuel supply device, 3...Blower, 5...Heat exchange mechanism. 5B...Duct, 77...Exhaust duct, 75...
Blowout duct, 75 l...1) "Ki 1". Representative Patent Attorney Takashi Okabe Figure 2, L'i'5 4 Figure

Claims (3)

[Claims] (1) A heater case equipped with an intake port and an exhaust port, a reactor provided within the heater case for catalytically reacting fuel, and a fuel supply device that supplies vapor phase or frost layer fuel to the reactor. a blower for blowing air introduced from the intake port to the reactor; a heat exchange mechanism for the reaction heat generated in the reactor and the heated air; and a heat exchange mechanism for transferring the heated air by the heat exchange mechanism to the vehicle. An introduction duct that is introduced into the room; an exhaust duct that is connected to the exhaust port of the heater case and that outputs exhaust gas that has been catalytically reacted in the reactor; A combustion type heater for a vehicle, characterized in that a combustion type heater for a vehicle is provided with a blow-off duct that does not blow out the exhaust gas on the outer surface of the heater. (2) The combustion type heater for a vehicle according to claim 1, wherein the blow-off duct has a blow-off port that opens to the outside of the vehicle body near the front windshield of the vehicle. (3) The exhaust duct is a combustion type for a vehicle according to claim 1, characterized in that the exhaust duct has an outlet that opens to the outside of the vehicle body near the rear window glass of the vehicle. Claim 1, characterized in that an internal hollow heat exhaust chamber disposed in one part of the seat is connected.
PI11 for vehicles described in section! Medium heat.