JPS6212411A - Vehicle heating device - Google Patents

Abstract

PURPOSE:To enhance the startability and heating ability of a heating device in which a combustion type hot water boiler is disposed in the circulation passage for engine cooling water, by disposing a four-way selector valve in the circulating passage to enable an engine and the boiler to be operated in combination or independently from each other. CONSTITUTION:A combustion air fan attached to a combustion type hot water boiler 13 is fitted on one of shafts of a motor 18, and a fuel pump 15 and a hot water circulating pump 17 may be driven by the other shaft of the motor through belts 22, 23, etc. Further, a four-way selector valve 30 having four pipe connecting ports A through D is disposed in a hot water circulating passage with the connecting port A being connected to the suction port of the pump 17 while the connecting port D is connected to the cooling water discharge port of an engine 1. A discharge pipe line 33 from the boiler 13 branches off into two pipe lines one 34 of which is connected to the inlet of a radiator 5 in the passenger's compartment 5 and the other one 35 of which is connected to the connecting port C. Further, a discharge pipe line 36 from the radiator 5 also branches off into two pipe lines one 37 of which is connected to the water return port of the engine 1 and the other one 38 of which is connected to the connecting port B.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a combustion type vehicle in which a combustion type hot water boiler is provided in a cooling water circulation path of a vehicle engine to raise the temperature of the cooling water and circulate it. The present invention relates to a heating device for use in heating systems.

(Prior art) There is a method for heating the cabin of a vehicle with an internal combustion engine that heats the cabin by supplying warmed circulating water after cooling the engine to a radiator in the cabin. When starting, idling, or when the engine output is low on a long descent, the cooling water does not warm up, so the heating effect in the cabin cannot be achieved sufficiently. For this purpose, there is a combustion type vehicle hot water boiler that is installed in the engine cooling water circulation path and raises the temperature of the cooling water to a temperature that satisfies the heating effect.

FIG. 7 shows an example of such a conventional device.

In the figure, 1 is the vehicle engine, 2 is the radiator, 13 is the radiator cap, 4 is the cooling water thermostat, 5 is the cabin radiator, 6 is the blower, 17 is the combustion type hot water boiler, 8
is a combustion blower, 9 is a fuel pump, 10 is a burner, 11
1 is a hot water circulation pump, and 12 is a high temperature water switch.

(Problems to be Solved by the Invention) In the conventional boiler described above, as a method of controlling the temperature of the cooling water, while the temperature of the cooling water is below a predetermined temperature, fuel is supplied to the boiler and burned in the burner. When the coolant temperature reaches a predetermined temperature or higher, the fuel supply is stopped and combustion in the burner is stopped, but it is difficult to reach the predetermined temperature using only the heat generated by the engine.

Therefore, when the burner of the boiler is turned on, the cooling water temperature immediately rises to a predetermined temperature or higher, for example in the early spring season. As a result, boiler burners often go through cycles of combustion and shutdown.

Since the ignition must be ignited each time the combustion and shutdown cycle is repeated, the power consumption of the battery increases, which wears out the battery and ignition coil, shortening their lifespan. Furthermore, the temperature of the hot water increases or decreases, resulting in large temperature changes within the vehicle interior, which is uncomfortable. Furthermore, even if the combustion boiler is stopped when the cooling water temperature rises sufficiently due to the heat generated by the engine so that the combustion boiler does not need to be operated, in conventional equipment, the circulating water passes through the boiler, so the resistance causes the circulation to stop. There was a problem in that the flow rate of water decreased, reducing the effectiveness of heating the interior of the vehicle. Furthermore, when the engine is stopped to warm the passenger compartment, circulating water heated by the combustion boiler is routed to the stopped engine, which causes heat to escape from the engine and reduce the effectiveness of heating the passenger compartment. There was a point.

(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, the engine cooling water circulation circuit is connected to the cabin radiator to heat the cabin. In a device that uses a type hot water boiler to raise the temperature of cooling water, a four-way switching valve that has four pipe connection ports on the outer periphery and a built-in rotary valve that has one groove that connects the adjacent connection ports is used. The piping for discharging cooling water from the engine and the piping on the water inlet side of the circulating water pump that communicates with the boiler are connected to the joint ports between adjacent four-way switching valves, and the boiler's discharge piping is divided into two. Branch out and connect one side to the cooling water supply of the passenger compartment radiator, and connect the other to the connection port on the water inlet side of the circulating water pump of the four-way switching valve, and connect it to the passenger compartment radiator. Divide the water discharge piping into two, connect one to the water return port of the engine, and connect the other to the connection port of the four-way switching valve that is symmetrical with the connection port connected to the engine to install the vehicle heating system. Configure.

(Function) Since the device of the present invention is configured as described above, when the engine cooling water outlet and the boiler circulating water pump water inlet are communicated via the four-way switching valve, the circulating water can be connected to the engine. When warming up the engine to improve engine startability, it goes through the boiler and cabin radiator.
When only the boiler is operated without rotating the blower of the cabin radiator, hot water heated by the combustion heat of the burner is circulated through the circuit by the circulation pump, warming the engine with hot water in a short time and improving starting performance. At the same time, engine life can be improved by reducing engine friction during cold weather and reducing wear. Furthermore, since the idling time of the engine can be shortened, the amount of fuel consumed by the engine can also be reduced. In addition, when the heating of the vehicle interior by the engine alone is insufficient, the dissatisfaction with insufficient heating of the vehicle interior can of course be resolved by raising the water temperature using the boiler. When the boiler is stopped in early spring or during a warm day, when the heating capacity of the passenger compartment is increased by heat generation from the engine alone, the four-way switching valve is turned to connect the engine and the passenger compartment radiator, and the boiler's water intake is activated. When the mouth side is closed, circulating water is discharged from the engine and returns to the engine through the cabin radiator.

In other words, since the water does not pass through the boiler, the resistance to water flow is reduced, and the temperature of the hot water does not drop, so there is no reduction in heating capacity.

Furthermore, when the boiler is operated by operating the four-way switching valve to connect the connection port on the water intake side of the circulating water pump and the connection port on the discharge side of the cabin radiator, the circulating water passing through the boiler will be
Circulating water is circulated between the boiler and the radiator inside the vehicle by the action of a circulating water pump. Therefore, by doing this, the interior of the vehicle can be heated while the engine is stopped. In other words, when it is desired to continue heating the vehicle for a long time while the vehicle is stopped, the present invention allows the driver to heat the vehicle interior by only operating the boiler while the engine is stopped and there is no engine noise. can take a good nap. Therefore, since a large engine does not have to be continuously operated, it is not only economical but also eliminates noise pollution.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 6. In the figure, 1 is the vehicle engine, 2 is the radiator, 3 is the radiator cap, 4 is the cooling water thermostat, and 5 is the radiator cap.
is a vehicle interior radiator, 6 is a blower, 113 is a combustion hot water boiler, 14 is a combustion blower fan, 15 is a fuel pump, 16
is a burner, and 17 is a hot water circulation pump.

18 is a motor having output shafts on the left and right sides;
A combustion blower fan 14 is fixed to one shaft, and a fuel pump drive pulley 19 and a pump drive pulley 20 are fixed to the other output shaft. The combustion blower fan 14 is placed in a case on the motor side of the boiler 13.

The fuel pump 15 has a pulley 21 fixed to its shaft, and a belt 22 that runs around the pulley 19 and the pulley 21.
It is driven by a motor 18 via. Further, the hot water circulation pump 17 has a pulley 23 fixed to its shaft, and is driven by a motor 18 via a belt 24 that extends around the pulleys 20 and 23. 25 is the fuel pump 15
A fuel cutoff valve 26 is installed in the middle of the suction side piping. 27 is a pipe on the discharge side of the fuel pump 15, which is wound around the exhaust pipe 28 of the boiler 13, and its end is connected to the burner 16 of the boiler 13 (see FIG. 2). 29 is a solenoid provided in the fuel pump 15.

30 has four piping connection ports A on the outer circumference of the cylindrical case.

This is a four-way switching valve that has B, C, and D, and incorporates a rotary valve that has one groove that communicates the adjacent connection ports. The piping connection port A of this four-way switching valve 30 is connected to the water inlet of the hot water circulation pump 17 via a piping 31, and the piping connection port adjacent to the piping connection port A is connected to the engine via a piping 32. It is connected to the cooling water outlet of No. 1. In addition, the discharge pipe 33 of the boiler 13 is branched into two, one pipe 34 is connected to the cooling water supply of the radiator 5 in the vehicle interior, and the other pipe 35 is connected to the connection port A of the four-way switching valve 30. It is connected to the connection port C located at the symmetrical position. Furthermore, the water discharge pipe 36 of the vehicle interior radiator 5 is branched into two, one pipe 37 is connected to the water return port of the engine l, and the other pipe 38 is connected to the connection port of the four-way switching valve 30. It is connected to the connection opening located in a plane symmetrical position.

Also, near the water outlet above the boiler 13, there is a high temperature water switch 39 whose electrical contact opens at temperatures above T (for example, 87°C).
is provided, and this switch 39 is connected to the fuel cutoff valve 26.
is electrically connected to. Further, a low temperature water switch 40 whose electrical contact closes at temperatures above 72° C. (for example, 82° C.) is provided at approximately the same position and is electrically connected to the solenoid 29 . Note that TI>T2.

41 is a burner temperature switch installed on the wall of a part of the burner of the boiler 13, and the set temperature T3 (for example, 130°C) is set.
It is opened as follows.

2 and 3 are detailed views of a portion of the burner of the combustion type hot water boiler 13. FIG. 42 is a combustion tube, 43 is an ignition plug mounting tube inserted and fixed almost tangentially to the combustion tube 42;
Reference numeral 44 denotes an ignition plug inserted into this mounting tube 43 and screwed into place, and an electric heating coil 44a is wound around this ignition plug 44. A heat insulating material 45 is provided on the outer periphery of the ignition plug mounting tube 43.
It is fitted. 46 is a partition plate between the fan 14 and the combustion chamber, and this partition plate 46 has an opening 4 as shown in FIG.
7 is a provision. 48 is a partition plate 4 along this frontage 47.
6 is a protruding curved guide plate; 49 is a combustion air outlet; 50 is a combustion air outlet;
51 is an air hole for introducing air into the ignition plug mounting tube 43;
(See FIG. 3) is a baffle for converting the swirling flow of combustion gas in the combustion tube 42 into a swirling contraction flow.

As shown in FIG. 2, the spark plug mounting tube 43 has a gap a between the outer circumferential surface of the tube and the inner circumferential surface of the combustion tube 42, and has an arcuate front shape as shown in FIG. Then, a liner 52 having a channel-shaped side cross-sectional shape as shown in FIG. An evaporation member 53 is provided along the bottom inner peripheral surface of the tube 42 and is attached to the lower half of the inner surface of the ignition plug mounting tube 43 and the upper surface of the liner 52. The evaporation member 53 is made of a layer of fibers such as silica wool.

Further, 27 shown in FIG. 2 indicates the fuel pump 1 as described above.
The discharge side piping of No. 5 is wrapped around the exhaust pipe 28 connected to the combustion tube 42 of the boiler 13, and its tip is inserted through the heat insulating material 45, the spark plug mounting tube 43, and the evaporation member 53 of the burner 16 to connect the burner. This is to supply fuel to the inside of 16.

Further, FIGS. 4 and 5 show details of the fuel pump 15, with reference numeral 54 indicating a pump case body and 55 a case lid. A cylindrical piston 56 is provided inside the pump case body 54 so as to be rotatable and slidable in the axial direction, and a flat notch 56a is formed in one side of the lower part of the piston 56. There is.

57 is a coil spring inserted between the lower end surface of the piston 56 and the bottom surface of the hole in the case body 54. A worm gear 58 is fixed to the upper end of the piston 56, and the upper surface of the worm gear 58 has a high portion 59a as shown in FIG.
A cam surface 59 having a step C is formed between the lower portion 59b and the lower portion 59b. The worm gear 58 is connected to the case body 54.
The shaft 60a of the worm 60 is driven by the motor 18 via the pulley 21 and belt 22 described above.

61 is a cam receiver protruding from the lower surface of the case lid 55;
The lower end surface of this cam receiver 61 abuts against the cam surface 59. 62 is a plate fixed on the case lid 55, and the above-mentioned solenoid 2 is mounted on this plate 62.
9 is fixed, and a bracket 63 is provided protrudingly. Reference numeral 64 denotes a pin that passes through the plate 62 and the case lid 55, and whose lower end surface abuts the upper end surface of the piston 56. As shown in the figure, it protrudes from the top of the plate 62 by a distance d (d<c). Reference numeral 65 denotes an L-shaped arm rotatably supported on the bracket 63 via a shaft 66. The upper end of this arm 65 is connected to the operating rod 29a of the solenoid 29 via a pin 67. The end portion of the pin 64 is joined to the upper surface of the pin 64. Therefore, when the solenoid 29 is energized, the operating rod 29a retracts and the arm 65 rotates clockwise in FIG. 4. This causes the pin 64 to be lowered by a distance d.

Further, 54a is an inlet provided in the case body 54, to which the pipe 27 described above is connected, and 54b is a discharge port, to which the pipe 25 described above is connected.

Further, FIG. 6 shows the control circuit of this embodiment, where E is a power source battery and F is a fuse.

The burner temperature switch 41 is connected to the power supply E via the relay R1, the contact 5lli-1 of the manual switch SW, and the fuse F. The motor 18 is connected in parallel to the relay R1 and the burner temperature switch 41, and the solenoid 29
A series circuit of low temperature water switch 40 and timer relay TR are each connected in parallel with motor 18. Also, normally open contact TR-1 of timer relay TR is connected in parallel with low temperature water switch 40, and normally open contact R1 of relay R1.
-1 is connected in parallel with the contact S1.

In addition, for the series circuit of contact R1-1 and timer relay TR, another contact 5W-2 of manual switch SW, normally closed contact R1-3 of relay R1, relay R2, and high temperature water switch 39 are connected in series. The circuits are connected in parallel, and a series circuit of normally closed contact R1-2 of relay R1, normally open contact R2-1 of relay R2, and spark plug 44 is connected to contact R
It is connected in parallel to the series circuit of 1-1 and timer relay TR. Further, the fuel cutoff valve 26 is connected in parallel to the relay R2, and the normally open contact R2-2 of the relay R2 is connected in parallel to the normally closed contact R1-3.

Next, the operation of this embodiment configured as described above will be explained.

When the connection port A and the connection port of the four-way switching valve 30 are brought into communication, the engine 1 and the water pump 17 are communicated via the four-way switching valve 30. At this time, connection port B and connection port C of the four-way switching valve 30 are closed, so that the cooling water circulation circuit is formed from the engine 1 through the boiler 13 and back from the radiator 5 to the engine 1. . In this water circuit, the temperature of the circulating water is determined by the high temperature water switch 39 and the low temperature water switch 4.
When the manual switch SvI of the control circuit is turned on when the burner temperature is lower than the set temperature of the burner temperature switch 41 and the burner temperature is lower than the set temperature of the burner temperature switch 41, the motor 18 rotates and the wind generated by the fan 14 is is the opening 47 of the partition plate 46
Air is blown into the combustion chamber from the combustion air outlet 49 through the combustion air outlet 49, and air that enters through the air hole 50 of the spark plug mounting tube 43 is also blown out from the spark plug mounting tube 43 into the combustion chamber and joins, swirling within the combustion chamber and forming a baffle. At 51, the flow becomes condensed and is discharged from the exhaust pipe 28 after passing through a heat exchanger. In this case, the fuel cutoff valve 26 is open, allowing fuel to pass through.

The water pump 17 is also linked to the rotation of the motor 18 via the water pump drive pulley 23 and the water pump drive belt 24, so circulating water is circulated from the boiler 13 to the radiator 5 to the engine 1.
It is circulated through the four-way switching valve 30-boiler 13 circuit.

Also, the fuel pump 15 is a fuel pump drive boot IJ-19.
Since the piston 5 is connected to the motor 18 via the fuel pump drive belt 22, the piston 5 is in mesh with the worm 60.
Since the worm gear 58 integrated with the cam receiver 6 rotates, the cam receiver 6
1 and the stepped opening between the cam surface 59, the piston 56 repeats reciprocating motion in the axial direction while rotating, sucks fuel from the fuel cutoff valve 26 side, and passes it through the fuel pipe 27 wrapped around the exhaust pipe 28. The liquid that has not penetrated into the evaporation member 53 of the burner 16 is collected on the dish-shaped liner 52.

Next, when the timer relay TR operates and the same contact TR-1 closes after a period of time has elapsed, the operating rod 29a of the solenoid 29
As a result, the arm 65 and the fuel pump 15 bottle 64
Push the piston 56 downward by a distance d through
The discharge capacity of the fuel pump 15 is reduced. Also, when the switch SW is closed, the spark plug 44 is energized and its coil 44a is turned on.
becomes red hot, so the fuel that has permeated into the evaporator member 53 evaporates, mixes with the air blown from the air hole 50 of the ignition plug mounting tube 43, and ignites.

In this embodiment, a dish-shaped liner 52 is suspended by a distance b from the combustion tube 42 which also serves as a heat exchanger, and an evaporator member 5 is placed above it.
3 is on top, the evaporator member 53 and dish-shaped liner 52 are rapidly heated by the heat of the ignited flame, and the fuel is also rapidly evaporated and gasified, so that combustion becomes active in a short period of time. As a result, when the burner wall becomes hot and the burner temperature switch 41 is activated, the relay R1 is turned ON, the normally closed contact R1-2 is opened, and the ignition plug 44 is turned OFF, but the burner 16 continues to burn vigorously. . When the timer relay TR stops when the time has elapsed, the contact TR-1 opens and the solenoid 29 is demagnetized and no longer presses the pin 64 of the fuel pump 15, so the fuel pump 15 supplies fuel to the burner 16 at full capacity. The combustion gas is fed and hard-twisted, and the combustion gas exchanges heat with the circulating water in the heat exchanger in the boiler 13, raising the temperature of the circulating water at once. The heat-exchanged combustion gas is discharged from the exhaust pipe 28. At this time, since the exhaust pipe 28 is heated by the exhaust gas, the fuel in the fuel pipe 27 wrapped around the exhaust pipe 28 is heated and supplied to the evaporator member 53 in a state where it easily evaporates. Further, since the outside of the ignition plug mounting tube 43 is covered with a heat insulating material 45, it is not exposed to cold air, so it is likely to become high temperature.

When the temperature of the circulating water in the boiler 13 becomes higher than the set temperature T2 of the low temperature water switch 40, the low temperature water switch 40 closes and the solenoid 29 is activated to shut down the fuel pump 15.
Reduces the discharge capacity of the fuel to produce weak combustion.

When the circulating water temperature becomes lower than T2, the low temperature water switch 40
opens to stop the solenoid 29, and as a result, the fuel pump 15 supplies fuel to the burner 16 at full capacity, rapidly raising the temperature of the circulating water by strong twist firing. In this way, strong twisting and weak combustion are repeated after reaching the set temperature T2 of the low temperature water switch 40. During this time, the rotation of the motor 18 is constant, so the amount of circulating water is constant. Low temperature water switch 4
When the water temperature rises in the weak combustion state in which 0 is activated and reaches the set temperature 11 of the high temperature water switch 39 or higher, the high temperature water switch 39 is opened, the fuel cutoff valve 26 is closed, and combustion is stopped. When the water temperature falls below the set temperature T1 of the high temperature water switch 39 and the burner temperature falls below the set temperature T of the burner one temperature switch 41, the ignition plug 44 and fuel cutoff valve 26 are energized to automatically ignite. resume. However, at this time, the burner is already warm, so the timer relay TR is not activated.

The circulating water is heated by the boiler 13 to become high-temperature water and passes through the vehicle interior radiator 5, so when the blower 6 is turned, the vehicle interior air exchanges heat with the vehicle interior radiator 5 and its temperature increases. The circulating water whose temperature has been lowered by radiating heat in the cabin radiator 5 is sent to the engine 1.
The water then returns to the boiler 13 via the four-way switching valve 30.

Next, when the temperature of the circulating water is sufficient to warm the passenger compartment only by the heat generated by the engine 1, turn off the switch SW of the boiler 13.
F, and when the four-way switching valve 30 is turned to connect the connection port and the connection port C, the circulating water of the engine 1 is transferred to the boiler 13.
Since the air does not pass through C, the air flows from the connection port of the four-way switching valve 30 through C without decreasing the flow rate or the temperature, and returns to the engine 1 after exchanging heat with the air in the cabin radiator 5. Since the connection port Δ of the four-way switching valve 30 is closed, the water in the boiler 13 remains stationary. Also, four-way switching valve 3
Since the connection port B of 0 is also closed, the circulating water coming out of the interior radiator 5 flows only to the engine 1.

Next, turn the four-way switching valve 30 to connect ports A, l! : When the boiler 13 is operated with the switch SW ON and the connection port C closed, the boiler 13 heats the circulating water, the heat is radiated by the cabin radiator 5, and the four-way switching valve 30 is heated again. Returns to the boiler 13 from connection port B through A. That is, in this case, the vehicle interior radiator 5 and the boiler 13
Circulating only the water circuit, with engine 1 stopped,
The interior of the vehicle can be heated efficiently.

When the switch is turned OFF to stop the boiler 13, the fuel cutoff valve 26 closes and combustion stops, but the motor 18 continues to rotate until the burner temperature switch 41 reaches the set temperature or lower. Scavenge the gas in the furnace.

(Effects of the Invention) Since the device of the present invention is configured as described above, when the cooling water outlet of the engine l and the water inlet of the circulating water pump 17 of the boiler 13 are communicated via the four-way switching valve 30, Circulating water circulates around the engine 1, boiler 13, and cabin radiator 5, so in order to warm up the engine 1 in order to improve the startability of the engine 1, the blower of the cabin radiator 5 is used.
If you operate only boiler 13 without rotating boiler 6,
The hot water heated by the combustion heat of the burner 16 is circulated through the circulation pump 1.
7 circulates through the circuit to warm the engine 1 with hot water in a short time to improve starting performance, and also to reduce the frictional resistance of the engine in cold weather and reduce wear, thereby improving the life of the engine. can.

Furthermore, since the idling time of the engine can be shortened, an economical effect can also be obtained in that the amount of fuel consumed by the engine can be reduced.

In addition, when the heating of the vehicle interior by the engine alone is insufficient, the dissatisfaction with the insufficient heating of the vehicle interior can of course be resolved by raising the water temperature with the boiler 13.

When the boiler 13 is stopped in early spring or during a warm day when the heating capacity of the vehicle interior is obtained only from the heat generated by the engine, the four-way switching valve 30 is turned to connect the engine 1 and the vehicle interior radiator 5, and When the water inlet side of the boiler 13 is closed, circulating water is discharged from the engine 1 and returns to the engine 1 through the cabin radiator 5. That is, since the water does not pass through the boiler 13, the water flow resistance is reduced, and the temperature of the hot water does not drop, so the heating capacity does not decrease.

Furthermore, when the four-way switching valve 30 is operated to connect the connection port A on the water intake side of the circulating water pump 17 and the connection port B on the discharge side of the vehicle interior radiator 5 to operate the boiler 13, the boiler 13 is operated. The circulating water that passes through the boiler 13 and the cabin radiator 5
The circulating water pump 17 circulates the water between them. Therefore, in this way, the vehicle interior can be heated while the engine 1 is stopped.

That is, when it is desired to continue heating the vehicle for a long time while the vehicle is stopped, according to the present invention, it is possible to heat the vehicle interior by only operating the boiler 13 while the engine 1 is stopped and the engine noise is eliminated. , the driver can take a good nap. Therefore, the present invention provides many excellent effects, such as not only being economical since a large engine does not have to be continuously operated, but also noise pollution can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a part of the apparatus of the present invention in cross section, Fig. 2 is a sectional view of a part of the burner of the combustion type hot water boiler, and Fig. 3 is a sectional view taken along line III-I in Fig. 2. , 4th
The figure is a vertical cross-sectional view of the fuel pump, Figure 5 is a cross-sectional view taken along the ■-V line in Figure 4, Figure 6 is a control circuit diagram, and Figure 7 is an explanatory diagram showing a conventional device partially in cross section. be. 1... Engine 5... Vehicle interior radiator 13
... Combustion type hot water boiler 15 ... Fuel pump 16 ... Burner 17
...Hot water circulation pump 18...Motor 26...
Fuel cutoff valve 27...Piping (fuel pipe) 28
...Exhaust pipe 29...Solenoid 30.
...Four-way switching valves A, B, C, D...Piping connection port 39...High temperature water switch 40...Low temperature water switch 41...Burner temperature switch 42...Combustion tube 43... Spark plug mounting tube 44... Spark plug 45... Heat insulating material 52.
... Liner 53 ... Evaporation member 54 ...
Pump case body 55...Case lid 56...Piston 58...Worm gear 59...Cam surface 60...Worm
61...Cam receiver 64...Pin
65... L-shaped arm Figure 1 Figure 4 Figure 5 Figure 2 Figure 3 Figure 52 (Linary Figure 6 Procedures Amendment Written by Mr. Michibu Uga, Commissioner of the Patent Office, November 7, 1985) Indication of the case Patent Application No. 151213 filed in 1985 2 Name of the invention Vehicle heating system 3 Person with amendment Relationship to the case Patent applicant Shintachikawa Aircraft Co., Ltd. 4 Agent 5 Target of amendment Description of the specification "Detailed Description of the Invention" column and the drawing "Wiring W25" are corrected. 2. "Piping 25" in line 15 of the same page is corrected to "piping 27". 8. Figure 4 in the drawings is attached as a separate sheet. Correct according to the correction diagram O Figure 4

Claims (1)

[Claims] 1. In a device that increases the temperature of the cooling water by installing a combustion type hot water boiler in the middle of the circuit that connects the engine cooling water circulation circuit to the passenger compartment radiator to heat the passenger compartment,
A four-way switching valve with a built-in rotary valve that has four pipe connection ports on the outer periphery and one groove that communicates with the adjacent connection ports is installed, and is connected to the piping that discharges cooling water from the engine and the boiler. Connect the piping on the water inlet side of the circulating water pump to the connection ports next to each other on the four-way switching valve, branch the boiler's discharge piping into two, and connect one of them to the cooling water inlet of the cabin radiator. , connect the other end to a connection port that is symmetrical to the water intake side connection port of the circulating water pump of the four-way switching valve, and divide the water discharge piping of the passenger compartment radiator into two, and connect one of them to the water return pipe of the engine. 1. A heating device for a vehicle, characterized in that the other end is connected to a connection port that is plane symmetrical to the connection port connected to the engine of a four-way switching valve.