JPH1035263A - Vehicular heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compensate a lack in heating capacity for a vehicle interior. SOLUTION: A cooling water circuit 4 constituting a vehicular hot-water heater is connected with a water pump 5, a front heater circuit 6 for circulating cooling water for an engine E through a front heater 23, a rear heater circuit 7 for circulating cooling water for the engine E through a rear heater 33, and a viscous heater 8 disposed near the outlet for cooling water of a water jacket 11 in the engine E for heating cooling water circulating through the cooling water circuit 4. By that arrangement, even when the front-seat side and the rear-seat side air-conditioning zones in the interior of a diesel-engine vehicle failing to sufficiently heat cooling water due to a smaller calorific value of its engine E are to be heated, the temperature of cooling water circulating through the cooling water circuit 4 can be raised to a predetermined cooling- water temperature to thereby compensate a lack in heating capacity for the front-seat side and the rear-seat side air-conditioning zones in the interior.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating system for a vehicle, comprising a front heater circuit for circulating cooling water for cooling an engine to a front heater, and a rear heater circuit for circulating cooling water for cooling the engine to a rear heater. It concerns the device.

[0002]

2. Description of the Related Art Conventionally, air heated through a front heater is blown out of a front duct through an outlet of a front duct to heat an air conditioning zone on a front seat side in the vehicle compartment and pass through a rear heater. 2. Description of the Related Art There is a vehicle heating device (so-called dual air conditioner) that heats a rear air conditioning zone in a vehicle cabin by blowing heated air into a vehicle cabin from an outlet of a rear duct. In such a vehicle heating device, a cooling water heated by the exhaust heat of the engine flows to the front heater, and a front heater circuit that returns the cooling water to the engine again, and a cooling water heated by the exhaust heat of the engine flows to the rear heater, A rear heater circuit for returning to the engine again is provided.

[0003]

However, for example, like a diesel engine vehicle and a lean burn engine vehicle,
In the case of a vehicle in which the amount of heat generated by the engine (the amount of exhaust heat) is small and the engine cooling water cannot be sufficiently heated, if the engine is operated at the idling rotational speed, the cooling flowing in the front heater circuit and the rear heater circuit. Since the temperature of the water does not rise to a predetermined cooling water temperature (for example, 80 ° C.), there is a problem that the heating capacity in the vehicle compartment is insufficient particularly during traffic congestion.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heating device for a vehicle which can prevent the shortage of heating capacity by increasing the heat radiation of the first heat exchanger and the second heat exchanger. It is in.

[0005]

According to the first aspect of the present invention, the first heating heat exchanger provided in the first circulation circuit and the second heating heat exchange provided in the second circulation circuit. By connecting a shear heat generator that heats the cooling water by the heat generated by the viscous fluid in the heat generating chamber in series to the heat exchanger, the heat radiation amount of the first heat exchanger and the second heat exchanger increases.
Thereby, even when heating the cabin of a vehicle in which the amount of heat generated by the engine is small and the cooling water cannot be sufficiently heated, the temperature of the cooling water in the first circulation circuit and the second circulation circuit is reduced to a predetermined cooling water temperature. Since it can be raised, the shortage of the heating capacity in the vehicle compartment can be compensated.

According to the second aspect of the present invention, the cooling water heated by the engine and further heated by the shear heating device is supplied to the first heating heat exchanger. The air heated by the passage is blown from the first outlet of the first air conditioning duct to the first air conditioning zone. Thereby, the heating capacity of the first air conditioning zone is improved, and the first air conditioning zone can be sufficiently heated. Cooling water heated by the engine and further heated by the shear heating device is supplied to the second heating heat exchanger, and the air heated by passing through the second heating heat exchanger is cooled by the second air conditioning device. The air is blown out from the second outlet of the duct to the second air conditioning zone. Thereby, the heating capacity of the second air conditioning zone is improved, and the second air conditioning zone can be sufficiently heated.

According to the third aspect of the present invention, when the temperature of the cooling water of the engine is equal to or higher than the predetermined temperature, the first circulation circuit, the second circulation circuit, and the third circulation circuit are opened by the thermostat, and the engine is opened. When the temperature of the cooling water is equal to or lower than the predetermined temperature, the fourth circulation circuit is opened by the thermostat. Thus, by suppressing the amount of heat radiation when the temperature of the engine coolant is equal to or lower than the predetermined temperature, the temperature of the engine coolant can be quickly increased.

According to the fourth aspect of the present invention, the load on the engine increases due to an increase in the driving torque of the engine that rotationally drives the rotor of the shear heat generator, and the amount of exhaust heat of the engine increases. Thereby, the temperature of the cooling water supplied to the first heating heat exchanger and the second heating heat exchanger increases, so that the heat release amount of the first heating heat exchanger and the second heating heat exchanger is increased. Therefore, the heating capacity of the entire vehicle interior can be improved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

[Configuration of First Embodiment] FIGS. 1 to 4 show a first embodiment of the present invention.
FIG. 1 is a view illustrating a cooling water circuit of an air conditioner for a vehicle according to an embodiment.

The vehicle air conditioner 1 of this embodiment is provided in a front engine vehicle equipped with a water-cooled diesel engine (hereinafter abbreviated as engine) E at the front of the vehicle, and includes a front air conditioner 2 and a rear heater device 3. This is a dual air conditioner configured to be controlled by an air conditioner control device (not shown).

The front air conditioner 2 is a front seat air conditioning unit for air conditioning a front seat (front seat) air conditioning zone in a vehicle interior, and is provided in front of the vehicle interior toward a front air conditioning zone in the vehicle interior. A front air conditioning duct (hereinafter, referred to as a front duct) 21 for sending air is provided. The front duct 21 is a component corresponding to the first air conditioning duct of the present invention, and is provided with a front fan 22, an air cooling unit, a front heater 23, and the like from the upstream side to the downstream side in the air flow direction. .

On the windward side of the front duct 21, an inside / outside air switching door 24 for selectively opening and closing the outside air suction port 24a and the inside air suction port 24b to switch the suction port mode is rotatably mounted. Downstream of the front duct 21, a defroster outlet 25a, a face outlet 25
b, and two mode switching doors 2 for selectively opening and closing the front foot outlet 25c to switch the outlet mode.
5 is rotatably mounted. The front foot outlet 25c is an opening corresponding to the first outlet of the present invention, and is an outlet that mainly blows out warm air toward the feet of the occupant on the front seat side. The front fan 22 is a component corresponding to a first blower of the present invention, and is a front seat fan that is rotated and driven by a blower motor 26 and generates an airflow toward a front seat air conditioning zone in a vehicle compartment in the front duct 21. is there.

As the air cooling means, there is provided an evaporator (refrigerant evaporator) 27 which cools air passing therethrough and constitutes one component of a refrigeration cycle mounted on a vehicle. The refrigerating cycle includes a compressor (refrigerant compressor), a condenser (refrigerant condenser), a receiver (gas-liquid separator), an expansion valve (expansion valve,
Pressure reducing device), the above-described evaporator 27, and a refrigerant pipe or the like connecting these in an annular manner. The compressor has a shaft 28 as an input shaft, and when the rotational power of the engine E is transmitted to the shaft 28, the evaporator 27
The refrigerant sucked in is compressed and discharged to the condenser.

The front heater 23 is a component corresponding to the first heating heat exchanger of the present invention, and is installed in the front duct 21 on the downstream side (downwind side) of the evaporator 27 in the air flow direction. This front heater 23
Is a front seat side heater core for reheating the cool air passing through the evaporator 27 using the cooling water as a heat source. An air mix door 29 is rotatably mounted on the windward side of the front heater 23. The air mix door 29 adjusts the amount of air passing through the front heater 23 (the amount of hot air) and the amount of air bypassing the front heater 23 (the amount of cold air) to adjust the temperature of the air blown into the vehicle interior. Means.

The rear heater device 3 is a rear-seat-side heater unit for heating the rear seat (rear seat) side air conditioning zone of the vehicle interior, and is provided below the rear seat of the vehicle interior to the rear air conditioning zone of the vehicle interior. A rear duct 31 for sending air to the air duct is provided. The rear duct 31 is a component corresponding to the second air conditioning duct of the present invention, and is provided with a rear fan 32, a rear heater 33, and the like from the upstream side to the downstream side in the air flow direction. Downstream of the rear duct 31, a rear foot outlet 35 is opened. The rear foot outlet 35 is an opening corresponding to the second outlet of the present invention, and is an outlet that mainly blows out warm air toward the feet of the occupant on the rear seat side. The rear fan 32 is a component corresponding to the second blower of the present invention, and is a rear-seat fan that is driven to rotate by the blower motor 36 and generates an airflow in the rear duct 31 toward the rear-seat air conditioning zone in the vehicle compartment.

The rear heater 33 is a component corresponding to the second heating heat exchanger of the present invention, and is installed in the rear duct 31 and is connected in parallel with the front heater 23 in the cooling water circuit 4. The rear heater 33 is a rear seat heater core for heating the air flowing in the rear duct 31 by using the cooling water of the engine E as a heat source.

Next, a cooling water circuit 4 used in a hot water type heating apparatus using the engine E as a main heating heat source will be described with reference to FIG. The cooling water circuit 4 includes a water pump 5 which is one of engine accessories driven by the engine E as a belt, a front heater circuit 6 in which cooling water for cooling the engine E circulates, and a front heater circuit 6. A rear heater circuit 7 that is connected in parallel and circulates cooling water that has cooled the engine E, and a viscous heater 8 that further heats the cooling water of the engine E are connected.

The engine E is mounted in an engine room provided at the front of the vehicle, and has a water jacket 11 which generates exhaust heat when operated and heats the cooling water by the exhaust heat. An outlet channel 4a communicates with the cooling water outlet of the water jacket 11, and an inlet channel 4b communicates with the cooling water inlet. Engine E
Is provided with a starter (DC motor) 14 that starts the engine E when the pinion gear 12 meshes with the ring gear 13 of the engine E when energized.
Then, the crankshaft (output shaft) 15 of the engine E
A multi-stage V-belt 17 for transmitting rotational power to an engine accessory is stretched over a crank pulley (V-pulley) 16. The water pump 5 is a component that is drivingly connected to the crankshaft 15 of the engine E via a belt (not shown) and circulates cooling water in the cooling water circuit 4.

The front heater circuit 6 is a circuit corresponding to the first circulation circuit of the present invention, and has an upstream end connected to the outlet passage 4a and a downstream end connected to the inlet passage 4b. The front heater circuit 6 is a front seat side heater circuit in which the cooling water heated by the water jacket 11 of the engine E flows through the front heater 23 and returns to the engine E again.

The rear heater circuit 7 is a circuit corresponding to the second circulation circuit of the present invention, and has an upstream end connected to the outlet passage 4a, a downstream end connected to the inlet passage 4b, and is connected in parallel to the front heater circuit 6. Have been. This rear heater circuit 7
Is a rear seat heater circuit in which cooling water warmed by the water jacket 11 of the engine E flows through the water valve 18 and the rear heater 33 in order and returns to the engine E again. The opening of the water valve 18 is adjusted by the air conditioner control device, and the amount of heat radiation of the rear heater 33 is controlled by adjusting the flow rate of the cooling water supplied to the rear heater 33 according to the opening. The water valve 18 may not be provided.

Next, the viscous heater 8 is shown in FIGS.
This will be briefly described based on the above. Here, FIG.
FIG. 3 is a diagram showing the power transmission device and the viscous heater 8;
FIG. 4 is a view showing the viscous heater 8 and the viscous clutch 10, and FIG.

The viscous heater 8 is a component corresponding to the shear heat generator of the present invention. The viscous heater 8 is drivingly connected to the engine E via a power transmission device 9 for transmitting the rotational power of the engine E to each engine accessory. It is a heating auxiliary heat source that heats the cooling water passing through the outlet channel 4a. The viscous heater 8 is connected downstream of the cooling water outlet of the water jacket 11 of the engine E, and connected in series upstream of the front heater circuit 6 and the rear heater circuit 7. The structure of the viscous heater 8 will be described later.

As shown in FIG. 1 to FIG. 4, the power transmission device 9 is a multi-stage V-type bridged around a crank pulley 16 attached to a crank shaft 15 of the engine E.
Belt 17 and an electromagnetic clutch (hereinafter referred to as an air conditioner clutch) of a compressor around which the V belt 17 is wound.
30 and an electromagnetic clutch (hereinafter referred to as a viscous clutch) 10 of the viscous heater 8 which is hung on the V-belt 17 together with the (air pulley 19 of) the air conditioner clutch 30.

As shown in FIG. 3, the viscous clutch 10 includes an electromagnetic coil 41 which generates a magnetomotive force when energized, and a rotor 4 which is rotationally driven by the engine E.
2. An armature 43 attracted to the rotor 42 by the magnetomotive force of the electromagnetic coil 41, and a leaf spring 44 is attached to the armature 43.
And a clutch means composed of an inner hub 45 and the like for providing rotational power to the shaft 39 of the viscous heater 8.

The electromagnetic coil 41 is formed by winding a conductive wire provided with an insulating film, is housed in a stator 46 made of a magnetic material such as iron, and is molded and fixed in the stator 46 with an epoxy resin. I have. Note that the stator 4
6 is fixed to the front surface of the housing 40 of the viscous heater 8. The rotor 42 has a V-belt 17 (see FIG.
(See FIG. 2 and FIG. 2) is joined by joining means such as welding, and a rotating body (input portion of the viscous clutch 10) which is constantly rotated by the rotational power of the engine E transmitted via the V-belt 17. It is. The rotor 42 is a first friction member formed of a magnetic material such as iron into a U-shaped cross section, and rotates around the outer periphery of the housing 40 of the viscous heater 8 via a bearing 48 provided on the inner peripheral side. It is freely supported.

The armature 43 has an axial air gap (for example, 0.5 mm) on the annular friction surface of the rotor 42.
With a ring-shaped friction surface facing each other with a gap
This is a second friction member formed of a magnetic material such as iron into an annular plate shape. When the armature 43 is attracted (engaged) to the friction surface of the rotor 42 by the magnetomotive force of the electromagnetic coil 41, the rotational power of the engine E is transmitted from the rotor 42. The leaf spring 44 has an outer peripheral side fixed to the armature 43 by a fixing means such as a rivet, and an inner peripheral side fixed to the inner hub 45 by a fixing means such as a rivet. When the electromagnetic coil 41 stops energizing, the plate spring 44
Is an elastic member that is displaced in a direction (leftward direction in the drawing) to separate (release) from the friction surface of the rotor 42 and returns to the initial position. The inner hub 45 is an output section of the viscous clutch 10 whose input side is drivingly connected to the armature 43 via the leaf spring 44 and whose output side is drivingly connected to the shaft 39 of the viscous heater 8 by spline fitting.

The viscous heater 8 includes a V-belt 17 and a viscous clutch 10 as shown in FIGS.
Shaft 3 to which the rotational power of engine E is given via
9, a housing 40 that rotatably supports the shaft 39, a separator 52 that divides the internal space of the housing 40 into a heating chamber 50 and a cooling water passage 51, and a rotor 53 rotatably disposed in the housing 40. It is composed of The shaft 39 is a viscous clutch 10
Is an input shaft which is fastened and fixed to the inner hub 45 by a fastening member 54 such as a bolt, and rotates integrally with the armature 43. The shaft 39 is rotatably supported on the inner periphery of the housing 40 via a bearing 55 and a seal member 56. Note that an oil seal that prevents leakage of a highly viscous fluid is used as the seal member 56.

The housing 40 is made of a metal member such as an aluminum alloy, and has an annular plate-shaped cover 57 fastened to the rear end thereof by fastening members 58 such as bolts and nuts. Note that a separator 52 and a sealing material 59 are mounted on a joint surface between the housing 40 and the cover 57. The sealing material 59 has O to prevent leakage of a highly viscous fluid.
Rings are used. The separator 52 is a partition member made of a metal member having excellent thermal conductivity, such as an aluminum alloy, and having an outer peripheral portion sandwiched between the cylindrical portion of the housing 40 and the cylindrical portion of the cover 57. Between the front end face of the separator 52 and the rear end face of the housing 40, there is formed a heat generating chamber 50 in which a high-viscosity fluid (for example, high-viscosity silicon oil or the like) that generates heat when a shearing force is applied is enclosed.

The rear end surface of the separator 52 and the inside of the cover 57 are liquid-tightly partitioned from the outside, and the engine E
The cooling water channel 51 in which the cooling water for cooling the cooling water flows is formed. Further, on the rear end surface on the lower side of the separator 52,
A large number of substantially arc-shaped fin portions 52a for efficiently transmitting the heat of the highly viscous fluid to the cooling water are integrally formed. Instead of the fin portion 52a, the rear end surface of the separator 52 may be uneven, or a heat transfer promoting member such as a corrugated fin or a fine pin fin may be provided on the outer wall surface of the cover 57. Further, a labyrinth seal may be formed between the separator 52 and the rotor 53, and the labyrinth seal may be used as the heating chamber 50. From the rear end face of the separator 52, a partition wall is formed so as to partition the cooling water passage 51 into an upstream water passage 51a communicating with the upstream side of the outlet flow passage 4a and a downstream water passage 51b communicating with the downstream side of the outlet flow passage 4a. 52b is bulged. Then, the partition wall 52 of the cover 57
An inlet-side cooling water pipe 57a through which cooling water flows into the cooling water path 51 and an outlet-side cooling water pipe 57b through which cooling water flows out from the cooling water path 51 are connected to the outer wall near b. The cooling water pipe 5 on the inlet side of the viscous heater 8
7 a is connected immediately after the cooling water outlet of the water jacket 11.

The rotor 53 is rotatably disposed in the heat generating chamber 50 and is fixed to the outer periphery of the rear end of the shaft 39. A plurality of grooves (not shown) are formed on the outer peripheral surface or both side wall surfaces of the rotor 53, and protrusions are formed between adjacent grooves. When the rotational power of the engine E is applied to the shaft 39, the rotor 53
By rotating integrally with the heating chamber 9, a shearing force is applied to the highly viscous fluid sealed in the heating chamber 50.

Here, the air conditioner control device has a viscous switch (not shown) for instructing the operation of the viscous heater 8, a cooling water temperature sensor (not shown) for detecting a cooling water temperature in the cooling water circuit 4, and the like. When the viscous switch is ON and the cooling water temperature detected by the cooling water temperature sensor is lower than the set cooling water temperature, the viscous clutch 10 is turned on and the viscous heater 8 is operated. Even if the viscous switch is ON, if the cooling water temperature detected by the cooling water temperature sensor is higher than the set cooling water temperature (set value),
The viscous clutch 10 is turned off to stop the operation of the viscous heater 8. Specifically, as the set cooling water temperature,
Hysteresis is provided between the set cooling water temperature (for example, 80 ° C.) and the set cooling water temperature (for example, 70 ° C.). When the temperature is higher than the set cooling water temperature, the viscous clutch 10 is turned off.
F, the viscous clutch 10 is turned on when the temperature is lower than the set cooling water temperature. Note that the hysteresis need not be provided.

The heat generating ability of the viscous heater 8 can be arbitrarily set in advance by the viscosity coefficient of the viscous fluid sealed in the heat generating chamber 50. That is, as the viscous fluid has a higher viscosity coefficient, the shearing force exerted by the rotation of the rotor 53 increases, so that the heat generating ability of the viscous heater 8 increases, and the load of the engine E and the fuel consumption rate increase.
On the other hand, as the viscosity coefficient of the viscous fluid decreases, the shearing force exerted by the rotation of the rotor 53 decreases, so that the heat generation capacity of the viscous heater 8 decreases, and the load on the engine E and the fuel consumption rate decrease.

[Operation of First Embodiment] Next, the operation of the air conditioner 1 for a vehicle according to the present embodiment will be briefly described with reference to FIGS.

When the ignition switch is turned on, the starter 14 is energized and the engine E starts.
Then, when the engine E starts, the crankshaft 15 rotates, and the rotor 42
Is transmitted to the engine E. At this time, the passenger on the front seat side of the vehicle turns on the viscous switch,
Further, when the heating of the front air conditioning zone is instructed and the heating of the rear air conditioning zone is instructed by the occupant on the rear seat side of the vehicle, the cooling water warmed in the water jacket 11 of the engine E becomes the water. The water is discharged from the cooling water outlet of the water jacket 11 by the action of the pump 5.

At this time, when the viscous clutch 10 is energized (ON) and the viscous heater 8 is belt-driven by the engine E, the armature 43 is attracted to the friction surface of the rotor 42 by the magnetomotive force of the electromagnetic coil 41. The rotational power of the engine E is transmitted to the inner hub 45 and the shaft 39. Then, since the rotor 53 rotates integrally with the shaft 39, a shear force acts on the high-viscosity fluid in the heating chamber 50, so that the high-viscosity fluid generates heat.
Thereby, the cooling water discharged from the cooling water outlet of the water jacket 11 flows into the cooling water passage 51 of the viscous heater 8 through the upstream side of the outlet flow path 4a, and passes through the cooling water passage 51 of the viscous heater 8. At this time, the fin portion 52a
Is heated by absorbing heat generated by the viscous fluid.

The cooling water further heated by the viscous heater 8 is sent to the front heater circuit 6 and the rear heater circuit 7 from the downstream branch point of the outlet flow path 4a. When the energization of the viscous clutch 10 is stopped (OFF) and the viscous heater 8 is not belt-driven by the engine E, the water jacket 1
The cooling water discharged from the cooling water outlet 1 passes through the cooling water passage 51 of the viscous heater 8 as a simple passage,
It is sent to the front heater circuit 6 and the rear heater circuit 7.

Then, the cooling water introduced into the front heater circuit 6 flows into the front heater 23, and when passing through the front heater 23,
2 heats the air flowing through the front duct 21. Here, the air heated by the front heater 23 is
The air is mainly blown out from the front foot outlet 25c into the front air conditioning zone in the vehicle interior to heat the front air conditioning zone in the vehicle interior.

On the other hand, the cooling water introduced into the rear heater circuit 7 flows into the rear heater 33,
When passing through the inside 3, the air flowing through the rear duct 31 is heated by the rear fan 32. Here, the air heated by the rear heater 33 is blown out from the rear foot outlet 35 into the rear seat side air conditioning zone of the vehicle interior, and the rear seat side air conditioning zone of the vehicle interior is heated.

[Effects of the First Embodiment] As described above, in the vehicle air conditioner 1 of the present embodiment, the heat value of the engine E is small and the cooling water is sufficiently heated by the water jacket 11 of the engine E. Even in the case of a diesel engine vehicle that cannot perform the cooling operation, for example, the cooling water temperature supplied to the front heater 23 and the rear heater 33 is reduced to a predetermined cooling water temperature (for example, 80 ° C). As a result, even if the engine E is operated at the idling rotational speed during traffic congestion, the amount of heat radiated from the front heater 23 and the rear heater 33 increases, so that the front air conditioning zone and the rear air conditioning zone in the vehicle cabin. Can compensate for the lack of heating capacity.

Then, the load on the engine E increases due to an increase in the driving torque of the engine E that drives the rotor 53 of the viscous heater 8 to rotate, and the amount of exhaust heat of the engine E increases. Thereby, the temperature of the cooling water supplied to the front heater 23 and the rear heater 33 rises, so that the heat radiation amount of the front heater 23 and the rear heater 33 also increases, so that the heating capacity of the entire vehicle interior can be improved.

In this embodiment, the viscous heater 8 is provided near the cooling water outlet of the water jacket 11 of the engine E, that is, in the middle of the outlet flow path 4a. As compared with the installed one, an increase in water flow resistance of the rear heater circuit 7 can be prevented. Thereby, the increase in the flow resistance of the rear heater circuit 7 with respect to the flow resistance of the front heater circuit 6 can be suppressed, so that the flow rate of the cooling water circulating in the rear heater circuit 7 is larger than the flow rate of the cooling water circulating in the front heater circuit 6. Can be prevented from being extremely reduced. Therefore, it is possible to solve a problem that the heating capacity of the rear seat air conditioning zone is extremely reduced with respect to the heating capacity of the front seat air conditioning zone.

[Second Embodiment] FIG. 5 shows a second embodiment of the present invention and is a view showing a cooling water circuit of an air conditioner for a vehicle.

In the present embodiment, the cooling water pipe on the inlet side of the viscous heater 8 is connected to a downstream portion of the front heater circuit 6 and a downstream portion of the rear heater circuit 7, and the viscous heater 8
The cooling water pipe on the outlet side is connected to the cooling water inlet of the water jacket 11 of the engine E, just before the suction port of the water pump 5, that is, in the middle of the inlet flow path 4b of the engine E. Also in this case, when the viscous heater 8 is belt-driven by the engine E, the cooling water temperature of the cooling water circulating in the cooling water circuit 4 rises by the amount of heat obtained by the viscous heater 8, so that the viscous heater 8 As compared with a conventional cooling water circuit that is not provided, the heat radiation amount of the front heater 23 and the rear heater 33 is increased, and the heating capacity of the front seat air conditioning zone and the rear seat air conditioning zone in the vehicle cabin can be improved.

In the present embodiment, the viscous heater 8
The high-temperature cooling water heated in step (1) can be drawn into the water jacket 11 of the engine E. Therefore, when the engine E is started by the starter 14 to warm up the engine E especially in the early morning of winter when the outside air temperature is low. Then, the cooling water temperature rises rapidly. Thus, the engine E can be warmed up quickly, and the fuel consumption of the engine E can be reduced.

[Third Embodiment] FIG. 6 shows a third embodiment of the present invention and is a diagram showing a cooling water circuit of an air conditioner for a vehicle.

The cooling water circuit 4 of the present embodiment has an outlet passage 4 a for circulating the cooling water of the engine E through the viscous heater 8.
A front heater circuit (first circulation circuit) 6 for circulating the cooling water of the engine E to the front heater 23; and a rear heater circuit (second circulation circuit) 7 for circulating the cooling water of the engine E to the water valve 18 and the rear heater 33. When,
A radiator circuit (third circulation circuit) 62 for circulating the cooling water of the engine E through the radiator 61 and a bypass circuit (fourth circuit) for bypassing the cooling water of the engine E from the radiator 61.
Circuit 63). As shown by the broken line in FIG. 6, a viscous heater 8 may be provided in the middle of the inlet passage 4b of the engine E.

The radiator 61 is a heat exchanger that cools the cooling water flowing into the inside by cooling air sent by a cooling fan (not shown) or running wind of the vehicle.
The front heater circuit 6, the rear heater circuit 7, the radiator circuit 62, and the bypass circuit 63 are connected in parallel. The bypass circuit 63 includes an engine E
Temperature of the cooling water (cooling water temperature) is a predetermined temperature (for example, 60
C), a thermostat 64 that opens the bypass circuit 63 at the following times is connected. This embodiment also has the same operation and effect as the first embodiment.

Fourth Embodiment FIG. 7 shows a fourth embodiment of the present invention, and is a diagram showing a cooling water circuit of an air conditioner for a vehicle.

This embodiment shows an example of the cooling water circuit 4 of a midship vehicle in which the engine E is mounted in the lower part of the front seat. The cooling water pipe 57 on the inlet side of the viscous heater 8
a and the outlet side cooling water pipe 57b are provided between the cooling water outlet of the water jacket 11 of the engine E and the upstream portion of the front heater circuit 6 and the upstream portion of the rear heater circuit 7, that is, in the middle of the outlet flow path 4a of the engine E. Connected.
The inlet-side cooling water pipe 57a and the outlet-side cooling water pipe 57b of the viscous heater 8 are connected between the downstream portion of the front heater circuit 6 and the downstream portion of the rear heater circuit 7 and the suction port of the water pump 5, that is, the engine E Inlet channel 4b
May be connected in the middle. Further, a bypass water channel 65 that bypasses the cooling water channel of the viscous heater 8 and an electromagnetic valve (open / close valve) 66 that opens and closes the bypass water channel 65 are provided.
Thereby, the water flow resistance of the cooling water circuit 4 when the viscous heater 8 is not used can be reduced.

The thermostat 64 of this embodiment
Is provided in a cooling water passage where a radiator circuit 62 and a bypass circuit 63 intersect with each other.
When the temperature is equal to or higher than a predetermined temperature (for example, 65 ° C.), the front heater circuit 6, the rear heater circuit 7, and the radiator circuit 62 are opened, and the bypass circuit 63 is closed. When the cooling water temperature of the engine E is equal to or lower than a second predetermined temperature (for example, 60 ° C.),
The bypass circuit 63 is opened, and the front heater circuit 6, the rear heater circuit 7, and the radiator circuit 62 are closed.

In this embodiment, when the cooling water temperature of the engine E is equal to or higher than the first predetermined temperature (for example, 65 ° C.), the thermostat 64 is opened to open the front heater circuit 6, the rear heater circuit 7, and the radiator circuit. When the cooling water temperature of the engine E is lower than the second predetermined temperature (for example, 60 ° C.), the thermostat 64 is opened.
By closing the valve, the bypass circuit 63 is opened, and by suppressing the amount of heat radiation when the cooling water temperature of the engine E is low, the cooling water temperature of the engine E can be quickly raised.

[Fifth Embodiment] FIGS. 8 and 9 show a fifth embodiment of the present invention, in which a viscous heater and a viscous clutch are shown.

The viscous heater 8 of this embodiment includes a shaft 70 to which the rotational power of the engine E is transmitted via the viscous clutch 10, a split housing 71 for rotatably supporting the shaft 70, and a housing 71
The case 72 includes a case 72 fixed therein, a rotor 73 rotatably disposed in the case 72, and the like. The shaft 70 includes a bearing 55 and sealing materials 56a,
6b through the bearing box 77 of the housing 71
Are rotatably housed in the inner periphery of the case and substantially in the center of the case 72. The seal member 56a is an O-ring, and the seal member 56b is an oil seal. The housing 71 is formed of a metal member such as an aluminum alloy, and includes a substantially bowl-shaped front housing 71a and a ring-shaped rear housing 71b, both of which are fastened and fixed by fastening members such as bolts and nuts. . In addition, a sealing material (not shown) is attached to a joint surface between the front housing 71a and the rear housing 71b.

An upper and lower portion of the housing 71 is integrally provided with a mounting stay 78 for mounting to a fixing member of the vehicle with a fastening member such as a bolt or a nut. The mounting stay 78 has a through hole 78a into which a fastening member is inserted. Further, a cooling water passage 79 through which the cooling water of the engine E flows is formed inside the housing 71. Further, the housing 71
Partitioning section 9 that partitions cooling water passage 79 into an upstream side and a downstream side
An inlet side cooling water pipe 91 and an outlet side cooling water pipe 92 are connected to the side wall near zero. A seal (not shown) is provided between the inlet-side cooling water pipe 91 and the outlet-side cooling water pipe 92 and the inlet port 79a and the outlet port 79b of the cooling water passage 79.

The case 72 is made of a metal member having excellent thermal conductivity, such as an aluminum alloy, and has an outer peripheral surface of the housing 7.
1 is partially joined to the inner peripheral surface using joining means such as welding. Further, inside the case 72, a heat generating chamber 93 in which a high-viscosity fluid is sealed is formed. A large number of plate-like fins 72a are integrally formed on the outer wall surfaces on both sides of the case 72.

[Other Embodiments] In this embodiment, the temperature of the front air conditioner 2 is controlled by the air mix temperature control method, and the temperature of the rear heater device 3 is controlled by the reheat temperature control method. The temperature may be controlled by a reheat type temperature control method or a flow control type temperature control method, and the temperature of the rear heater device 3 may be controlled by an air mix temperature control method.

In this embodiment, the front air conditioner 2 capable of cooling and heating is employed as the first air conditioning unit such as the front air conditioning unit. However, a front heater device capable of heating only may be employed as the first air conditioning unit. good. Further, in the present embodiment, the rear heater device 3 capable of only heating is employed as the second air conditioning unit such as the rear seat air conditioning unit, but a rear air conditioner capable of cooling and heating may be employed as the second air conditioning unit.

In the present embodiment, the present invention is applied to a dual air conditioner for heating the front air conditioning zone and the rear air conditioning zone of the vehicle, but the present invention is applied to the right seat (driver's seat) side of the vehicle. The present invention may be applied to a heating device for a vehicle such as a bus vehicle or a passenger car that heats the air conditioning zone and the left seat (passenger seat) side air conditioning zone. In this embodiment, only the viscous heater 8 is used as the heating auxiliary heat source.
In addition, a heating auxiliary heat source such as a combustion heater, a water-cooled alternator, an electric heater, or a PTC heater may be used in combination.

In this embodiment, the viscous heater 8 is belt-driven by the engine E. However, the viscous heater 8 may be belt-driven by an engine mounted separately from the engine E which is the main heating source. Also, viscous clutch 1
0 is abolished, and the viscous heater 8
May be driven by a belt, or the viscous heater 8 may be directly connected to the crankshaft 15. Further, instead of the engine E, the viscous heater 8 may be rotationally driven by another driving source such as an electric motor or an air-cooled engine.

In the present embodiment, the present invention is applied to a front engine vehicle in which the engine E is mounted at the front of the vehicle or a midship vehicle in which the engine E is mounted at the lower part of the front seat.
The present invention may be applied to a midship engine vehicle in which the engine E is mounted between the cabin and the rear axle, or a rear engine vehicle in which the engine E is mounted at the rear of the vehicle. In this case,
The flow path length from the engine E to the front heater 23 and the rear heater 33 can be substantially the same length, or the flow path length from the engine E to the rear heater 33 can be shorter than the flow path length from the engine E to the front heater 23. .

In the present embodiment, a viscous switch,
Although the cooling water temperature sensor and the air conditioner control device are provided, the operation start means may be instructed to start the operation of the viscous heater 8 according to the operation state of the temperature control lever or the heater switch. Further, when the viscous heater 8 is driven by the belt, if the engine E is at the idling rotational speed, the rotational speed may be changed to a set rotational speed that is higher than the normal idling rotational speed.

In this embodiment, the front foot outlet 25c is used as the first outlet, but the defroster outlet 25a may be used as the first outlet. In this case, the belt driving of the viscous heater 8 is also started immediately after the start of the engine E, so that the temperature of the cooling water circulating in the front heater circuit 6 rapidly rises. Therefore, when the engine E is started in the early morning of winter, icing of the windshield can be removed early, and the anti-fog performance of the windshield can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a cooling water circuit of a vehicle air conditioner (first embodiment).

FIG. 2 is a schematic diagram showing an engine, a power transmission device, and a viscous heater (first embodiment).

FIG. 3 is a sectional view showing a viscous clutch and a viscous heater (first embodiment).

FIG. 4 is a sectional view showing a viscous heater (first embodiment).

FIG. 5 is a configuration diagram illustrating a cooling water circuit of a vehicle air conditioner (second embodiment).

FIG. 6 is a configuration diagram illustrating a cooling water circuit of a vehicle air conditioner (third embodiment).

FIG. 7 is a configuration diagram illustrating a cooling water circuit of a vehicle air conditioner (fourth embodiment).

FIG. 8 is a sectional view showing a viscous clutch and a viscous heater (fifth embodiment).

FIG. 9 is a sectional view showing a viscous heater (fifth embodiment).

[Explanation of symbols]

 E engine 1 vehicle air conditioner (vehicle heating device) 4 cooling water circuit 6 front heater circuit (first circulation circuit) 7 rear heater circuit (second circulation circuit) 8 viscous heater (shear heating device) 9 power transmission device 10 Viscous clutch 21 Front duct (first air conditioning duct) 22 Front fan (first blower) 23 Front heater (first heat exchanger) 25c Front foot outlet (first air outlet) 31 Rear duct (second air conditioning duct) Reference Signs List 32 rear fan (second blower) 33 rear heater (second heat exchanger) 35 rear foot outlet (second outlet) 50 heat generating chamber 53 rotor 61 radiator 62 radiator circuit (third circulation circuit) 63 bypass circuit (fourth) (Circulation circuit) 64 thermostat 73 rotor 93 heating chamber

Claims (4)

[Claims] (A) an outlet flow path for allowing cooling water to flow out of the engine; (b) an inlet flow path for returning cooling water to the engine; and (c) cooling water flowing from the outlet flow path. (1) a first circulation circuit that flows through the heat exchanger for heating and returns to the inlet flow path; (d) a cooling water that is connected in parallel to the first circulation circuit and that flows in from the outlet flow path, A second circulation circuit that flows into the exchanger and returns to the inlet flow path; (e) a rotor that is installed in the outlet flow path or the inlet flow path and that rotates when rotational power is applied, and that rotational power is applied to the rotor A heating device for a vehicle, comprising: a heating chamber in which a viscous fluid that generates heat by the action of a shearing force is housed, and a shear heating device that heats cooling water by heat generated by the viscous fluid in the heating chamber. . 2. The vehicle heating apparatus according to claim 1, further comprising a first outlet for blowing air heated by the first heat exchanger toward a first air conditioning zone in the vehicle compartment. 1 air-conditioning duct, and the air heated by the second heating heat exchanger
A second air-conditioning duct having a second air outlet that blows out toward a second air-conditioning zone in a vehicle interior different from the air-conditioning zone; and a first blower that generates an airflow toward the first air-conditioning zone in the first air-conditioning duct. A heating device for a vehicle, comprising: a second blower configured to generate an airflow toward the second air conditioning zone in the second air conditioning duct. 3. The vehicle heating device according to claim 1, wherein the cooling device is connected in parallel to the first heating heat exchanger and the second heating heat exchanger and heated by the engine. The water,
A third circulation circuit for flowing to the radiator and returning to the engine again, and the cooling water flowing out of the engine is bypassed to the first heating heat exchanger, the second heating heat exchanger, and the radiator, and the cooling water is returned again. A fourth circulation circuit returning to the engine; and opening the first circulation circuit, the second circulation circuit, and the third circulation circuit when the temperature of the cooling water of the engine is equal to or higher than a predetermined temperature. And a thermostat that opens the fourth circulation circuit when the temperature is equal to or lower than a predetermined temperature. 4. A heating device for a vehicle according to claim 1, wherein the rotor of the shear heat generator receives rotational power from the engine. .