JPH1170812A - Vehicular heat generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth the start of a rotor and dissolve the various kinds of inconvenience by reducing a load torque at the start time of the rotor as much as possible, in a vehicular heat generator. SOLUTION: A heat generating room 7 is partitioned in a housing and a rotor 14 connected to a drive shaft 13 and silicon oil (viscous fluid) are stored in the heat generating room 7. A storing hole 17 is formed on the housing of the lower side of the heat generating room 7 and a partition body 35 slid in front/rear sides by an electro-magnetic solenoid 30 is arranged in this storing hole 17. This partition body 35 communicates with the heat generating room 7 through a communication passage 18 and also partitions a volume variable evacuation room 19 in the storing hole 17. The liquid level of an oil in the heat generating room 7 can be changed in response to the front/rear movement of the partition body 35. Therefore, the liquid level of the oil in the heat generating room 7 is dropped at the stop time of the rotor and the load torque at the restart time can be minified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a heat generating chamber and a heat radiating chamber defined in a housing, and heats the viscous fluid contained in the heat generating chamber by shearing the viscous fluid with a rotor operatively connected to an external drive source. The present invention relates to a vehicle heat generator that generates heat and exchanges the heat with a circulating fluid flowing through the radiating chamber.

[0002]

2. Description of the Related Art As a heating device for a vehicle, heat cooling water used for cooling a water-cooled engine is supplied to a heater core in a duct, and air heated by the heater core is sent into the vehicle interior to heat the vehicle interior. A hot water heating device for a vehicle is generally used. However, in a vehicle such as a diesel engine vehicle or a lean burn engine vehicle, which generates a relatively small amount of heat from the engine and cannot sufficiently heat the engine cooling water, the temperature of the cooling water supplied to the heater core is reduced. Is difficult to maintain at a predetermined water temperature (for example, 80 ° C.), and there is a disadvantage that the heating capacity in the vehicle compartment tends to be insufficient.

[0003] For the purpose of solving such a drawback, a shear heating device (belonging to the category of a vehicle heat generator) is provided as an auxiliary heating device for heating the engine cooling water in the engine cooling water circulation circuit system. Proposed. For example, a shearing heat generator disclosed in Japanese Patent Application Laid-Open No. 2-246823 includes a heat generating chamber and a water jacket (heat radiating chamber) partitioned in a housing, a drive shaft, and a rotor housed in the heat generating chamber. ing. The rotational power of the vehicle engine is transmitted to the drive shaft via a belt transmission mechanism and an electromagnetic clutch, and the rotor rotates integrally with the rotation of the drive shaft. The rotating rotor shears the viscous fluid (for example, high-viscosity silicone oil) contained in the heat generating chamber to generate heat based on fluid friction, and the heat generates a circulating fluid (engine cooling water) flowing through the water jacket. Heating.

[0004]

However, when the conventional shearing heat generator is started (that is, when the rotational power of the engine is started to be transmitted to the rotor), the viscous fluid whose viscosity has become extremely high due to cooling is increased. This tends to hinder smooth startup of the rotor. In other words, when the shear heating device is started, a large load torque is applied to the engine via the rotor, the electromagnetic clutch, and the belt transmission mechanism. For this reason, when the rotor is started forcibly, a large starting shock occurs, and the clutch plate of the electromagnetic clutch and the belt of the belt transmission mechanism slip. Further, there are disadvantages that abnormal noise is generated and wear of each part of the shearing heat generator is accelerated.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the load torque at the time of starting the rotor as much as possible, thereby smoothing the start of the rotor, and eliminating the inconvenience of generating abnormal noise and early wear of members due to the load torque. It is an object of the present invention to provide a heat generator for a vehicle that can perform the heat generation. In addition, it is possible to secure a larger amount of viscous fluid subjected to shearing and to withstand long-term use, and to continuously exhibit the necessary heat generation performance while preventing deterioration due to overheating of the viscous fluid. It is an object of the present invention to provide a heat generator for a vehicle.

[0006]

According to a first aspect of the present invention, there is provided a heat generating chamber and a heat radiating chamber partitioned in a housing, wherein a viscous fluid contained in the heat generating chamber is sheared by a rotor to generate heat, A vehicle heat generator for exchanging the heat with a circulating fluid flowing through the heat radiating chamber, comprising a fluid level control means for changing a fluid level of a viscous fluid in the heat generating chamber, wherein the fluid level control means comprises: It is characterized in that it has a variable-volume shelter that is disposed below the heating chamber and is connected to the heating chamber.

[0007] According to this configuration, the fluid level control means introduces the viscous fluid in the heat generating chamber into the variable volume evacuation chamber according to the changing volume, or derives the viscous fluid once introduced therefrom. Then, the fluid level of the viscous fluid in the heat generating chamber is appropriately changed. Therefore, before the rotor in the stopped state is restarted, the fluid level in the heat generating chamber is reduced in advance, so that the viscous fluid remaining in the heat generating chamber may increase the load torque at the time of restarting the rotor. Can be prevented.

According to a second aspect of the present invention, in the vehicle heat generator according to the first aspect, the fluid level control means changes the volume of the evacuation chamber to change the viscosity of the evacuation chamber to the evacuation chamber. It is characterized by comprising a volume variable means which enables introduction of a fluid and derivation of a viscous fluid from the evacuation chamber to the heating chamber.

The basic function of the volume changing means is to change the volume of the escape room disposed below the heating chamber. That is, by expanding the volume of the refuge room, the viscous fluid is allowed to be introduced (or evacuated) from the heat generating room to the refuge room based on its own weight or the like. On the other hand, by reducing the volume of the evacuation room that has been once expanded, the viscous fluid evacuated to the evacuation room is led out (or overflows) into the heating chamber. Thus, variable control of the fluid level of the viscous fluid in the heating chamber is realized.

According to a third aspect of the present invention, in the vehicle heat generator according to the second aspect, the volume variable means is movably provided in a receiving hole formed in a housing below the heat generating chamber. And a partition for forming the refuge room in the accommodation hole, and a drive unit for moving the partition.

[0011] In this configuration, the partition defines a waiting room in a receiving hole formed in the housing below the heat generating chamber. This partition is moved in the accommodation hole by the driving means. This movement changes the volume of the waiting room.

According to a fourth aspect of the present invention, in the vehicle heat generator according to the second or third aspect, the fluid level control means adjusts a fluid level of the viscous fluid remaining in the heat generating chamber to the fluid level in the heat generating chamber. It is characterized in that it can be lowered from the lowermost part of the rotor and raised above the lowermost part of the rotor.

By lowering the fluid level of the viscous fluid remaining in the heat generating chamber from the lowermost portion of the rotor, the rotor can be released from the restraint of the viscous fluid, and the load torque when the stopped rotor is restarted is reduced. can do. On the other hand, by raising the fluid level of the viscous fluid remaining in the heat generating chamber above the lowermost portion of the rotor, it is possible to recover the shear heating effect of the viscous fluid by the rotating rotor.

According to a fifth aspect of the present invention, in the vehicle heat generator according to any one of the second to fourth aspects, the fluid level control means is connected to a control device. In a situation where the external drive source operatively connected to the rotor stops driving, the introduction of viscous fluid from the heat generating chamber to the standby chamber is allowed, and in a situation where the external drive source starts driving, the evacuation is performed. The fluid level control means is controlled so that the viscous fluid can be led out from the chamber to the heating chamber.

Based on the control of the fluid level control means by this control device, the introduction of the viscous fluid from the heat generating chamber to the evacuating chamber is permitted under the condition that the external driving source stops driving, and the viscous fluid in the heat generating chamber is controlled. Fluid levels can be reduced to the extent that future restarts of the rotor are not restrained.
On the other hand, under the situation where the external drive source starts driving, the viscous fluid is led out from the waiting room to the heat generation chamber, and the viscous fluid in the heat generation chamber may be subjected to the shearing action of the rotor driven by the external drive source. It becomes possible.

According to a sixth aspect of the present invention, in the vehicle heat generator according to any one of the first to fourth aspects, the supply passage and the recovery passage are defined while the viscous fluid is additionally stored and partitioned in the housing. A storage chamber that communicates with the heat generation chamber via the heating chamber; and a valve unit that controls opening and closing of the communication state of the supply passage.

According to this configuration, the viscous fluid is additionally stored in the storage chamber in addition to the heat generating chamber, so that a larger amount of the viscous fluid is secured. In addition, by providing a supply passage and a recovery passage communicating the heating chamber and the storage chamber, the viscous fluid is supplied from the storage chamber to the heating chamber via the supply passage, while the viscous fluid is stored from the heating chamber through the recovery passage. It is possible to perform a replacement circulation in which the water is collected in the room. The distribution of the viscous fluid in the heating chamber and the storage chamber is adjusted by controlling the open / close state of the supply passage by the valve means. As a result, the amount of the viscous fluid in the heating chamber (that is, the amount of the viscous fluid subjected to shearing) is increased or decreased to achieve the variable adjustment of the heat generation capacity.

According to a seventh aspect of the present invention, in the vehicle heat generator according to the sixth aspect, the valve means includes a valve disposed in the storage chamber to open or close the supply passage, And an operating mechanism for operating the body.

According to this configuration, when the flow of the viscous fluid in the supply passage is inactive, such as immediately after the valve body moves from the closed position to the open position, for example, immediately after the stopped rotor is started,
The valve body is intentionally operated by the operation mechanism, and the movement of the valve body can promote the flow of the viscous fluid in the supply passage. Thereby, the variable adjustment of the heat generation capability is achieved without delay.

According to an eighth aspect of the present invention, in the vehicle heat generator according to the seventh aspect, the operating mechanism is connected to a controller, and the controller shifts the supply passage from a closed state to an open state. The operating mechanism is controlled so that the valve body is continuously switched between the closed position and the open position for a certain period immediately after the operation.

According to the control of the operating mechanism by this control device, the viscous fluid is pushed into the supply passage, that is, pumped by the continuous switching arrangement of the valve element. As a result, an inertial flow occurs in the supply passage, and the drawing of the viscous fluid from the storage chamber to the heat generation chamber via the supply passage is expedited.

According to a ninth aspect of the present invention, in the vehicle heat generator according to the second aspect, the volume variable means is movably provided in a housing hole formed in a housing below the heat generating chamber. And a partitioning body for partitioning the escaping chamber in the housing hole. The heat generator is further partitioned in the housing to additionally store a viscous fluid, and to further form the heat generating chamber via a supply passage and a recovery passage. A storage room communicating with
Valve means for controlling the opening and closing of the communication state of the supply passage, wherein the valve means includes a valve body disposed in the storage chamber to open or close the supply passage, and the partition body and the valve The gist is that the body and the body are operatively connected to a common drive source via a coupling body.

According to this configuration, the joint is operated by controlling the common drive source, and the operation of the valve body and the movement of the partition are realized through the joint. For this reason, the valve means and the variable volume means function with a common drive source. As described above, by sharing the drive source between the two means, it is possible to contribute to the reduction in the number of members of the vehicle heat generator, and the manufacturing cost is reduced accordingly. Further, the control device can function the volume varying means and the valve means by controlling the common drive source, so that the control program is simplified.

[0024] In this specification, "pumping"
This means the approach / separation movement of the valve element performed to promote the movement of the viscous fluid to the passage connecting the heat generating chamber for accommodating the viscous fluid and the storage chamber.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) Hereinafter, Embodiment 1 according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

As shown in FIG. 1, the outer shell of the vehicle heat generator is constituted by a housing body 1 and a housing lid 2. The housing body 1 includes a hollow cylindrical boss 1a protruding forward (to the left in the drawing) and a boss 1a.
and a cylindrical portion 1b extending largely toward the rear from the base end portion of FIG. The housing lid 2 is shaped to cover the rear opening side of the cylindrical portion 1b. The housing main body 1 and the housing lid 2 are fastened by a plurality of bolts 3 (only one is shown) while a pair of front partition plates 5 and rear partition plates 6 are provided inside the cylindrical portion 1b of the housing main body 1. Have been.

Front compartment plate 5 and rear compartment plate 6
Have annular rim portions 5a, 6a on the outer periphery thereof. By sandwiching the rim portions 5a, 6a between opposing wall surfaces of the mutually connected housing bodies 1, 2, the partition plates 5, 6 are immovably housed in the housing bodies 1, 2. . Also, the front compartment plate 5
The rear end has a concave shape with respect to the rim portion 5a, and a heat generating chamber 7 is formed between the two partition plates 5 and 6 by mutual connection. As described above, the housing of the vehicle heat generator includes the housing body 1, the housing lid 2, and the front and rear partition plates 5 and 6. The components of these housings are made of aluminum or aluminum alloy.

On the front end side, the front partition plate 5 has a support cylinder 5b formed at the center thereof and a plurality of concentric arc-shaped arcs extending in the circumferential direction along the outside of the support cylinder 5b. And a guide fin 5c. The front partition plate 5 is fitted into the housing main body 1 such that a part of the support cylinder 5b is in close contact with the inner wall of the housing main body 1. As a result, the heating chamber 7 is provided between the inner wall of the housing body 1 and the main body of the front partition plate 5.
An annular front water jacket 8 is defined as a heat radiating chamber adjacent to the front side. In the front water jacket 8, the rim 5a, the support cylinder 5b, and the guide fins 5c serve as guide walls for guiding the flow of circulating water as a circulating fluid, and the circulation of circulating water in the front-side radiation chamber. Set the route.

The rear partition plate 6 has, at the rear end side, a tubular portion 6b formed at the center thereof and a tubular portion 6b
And a plurality of guide fins 6c formed in a concentric arc shape extending in the circumferential direction along the outside. When the rear partition plate 6 is fitted into the front housing main body 1 together with the front partition plate 5, the cylindrical portion 6 b of the rear partition plate 6 is in close contact with the annular wall 2 a protruding from the housing lid 2. As a result, between the housing lid 2 and the main body of the rear partition plate 6, an annular rear water jacket 9 as a heat dissipation chamber adjacent to the rear side of the heat generating chamber 7 and a position inside the cylindrical portion 6b are provided. A sub oil chamber 10 is defined as a storage chamber. In the rear water jacket 9, the rim portion 6a, the cylindrical portion 6b, and the guide fin 6 are provided.
c serves as a guide wall for guiding the flow of the circulating water as the circulating fluid, and sets the circulation path of the circulating water in the rear heat dissipation chamber.

Further, a water inlet port (not shown) for taking in circulating water from a heating circuit (not shown) provided in the vehicle into each of the front and rear water jackets 8 and 9 is provided on a side wall of the housing body 1. A water outlet port (not shown) for sending circulating water from the front and rear water jackets 8, 9 to the heating circuit is provided in parallel.

As shown in FIG. 1, a drive shaft 13 is rotatably supported by the housing body 1 and the front partition plate 5 via a bearing 11 and a bearing 12 with a seal. The sealed bearing 12 is interposed between the inner peripheral surface of the support cylindrical portion 5 b of the front partition plate 5 and the outer peripheral surface of the drive shaft 13, and seals the front of the heat generating chamber 7.

A pulley 16 is fixed to the front end of the drive shaft 13 by bolts 15. The pulley 16 is drivingly connected to an engine E of a vehicle as an external drive source via a V-belt 27 wound around an outer peripheral portion thereof.

At the rear end of the drive shaft 13, a disk-shaped rotor 14 housed in the heat generating chamber 7 is press-fitted and fixed so as to be integrally rotatable. The clearance between the front and rear end surfaces and the outer peripheral edge of the rotor 14 and the inner wall surface of the heat generating chamber 7 opposed thereto is set very small, for example, in the range of several tens to several hundreds of microns (μm). A plurality of rotor communication holes 14 a penetrating the rotor 14 back and forth are formed in a central region of the rotor 14 near the drive shaft 13. These rotor communication holes 14a are arranged at equal angular intervals around the drive shaft 13 at positions equidistant from the center axis of the drive shaft 13.

An auxiliary oil chamber 10 as a storage chamber is provided in a region surrounded by the cylindrical portion 6b of the rear partition plate 6 and the housing lid 2. Rear compartment plate 6
The upper communication hole 6d as a recovery passage and the lower communication hole 6e as a supply passage penetrating the main body part back and forth, and a guide extending substantially radially from the lower communication hole 6e on the front surface of the partition plate 6. It has a groove 6f. The heating chamber 7 and the sub oil chamber 10 are connected to the upper and lower communication holes 6d, 6d.
e communicate with each other. The communication cross-sectional area of the lower communication hole 6e is set larger than that of the upper communication hole 6d. The upper communication hole 6d is formed at a position where it can face the rotor communication hole 14a.

As shown in FIGS. 1 to 3, a first electromagnetic solenoid 20 is provided on the housing lid 2. The electromagnetic solenoid 20 is housed in a case 22 attached to the outer surface of the housing lid 2 with a plurality of bolts 21. The electromagnetic solenoid 20 includes an upper solenoid coil 23 disposed in a case 22 and a core rod 24 as a valve disposed in the center thereof. The core rod 24 is attached to the housing lid 2 so as to be slidable back and forth, and is disposed in the sub oil chamber 10 such that the tip thereof faces the lower communication hole 6e as a supply passage. The diameter of the distal end surface of the core rod 24 is set to be larger than the opening diameter (diameter of the communication cross section) of the lower communication hole 6e, and the lower communication hole 6e can be closed at the distal end surface. Thus, the core rod 24 as a valve body can be switched between the open position (shown in FIGS. 1 and 3) and the closed position (shown in FIG. 2).

The core rod 24 as a valve body is formed with a concave portion 25 which is open at the tip end surface. This recess 25
Has a circular cross-sectional shape, and the inner diameter thereof substantially matches the opening diameter of the lower communication hole 6e. Further, a coil spring 26 as an urging member is disposed between the distal end of the core rod 24 and the inner wall surface of the housing lid 2, and urges the entire core rod 24 toward the rear partition plate 6. doing. In the first embodiment, an electromagnetic solenoid 20 is constituted by the solenoid coil 23, the core rod 24, and the coil spring 26, and the electromagnetic solenoid 20 constitutes a main part of a valve means. In addition, the solenoid coil 23 and the coil spring 26 constitute an operation mechanism of the valve body.

Further, as shown in FIG. 1, a receiving hole 17 is provided in the rim portions 5a and 6a of the front and rear partition plates 5 and 6 immediately below the bottom of the heat generating chamber 7.
The receiving hole 17 is provided between the two rim portions 5 from the housing lid 2 side.
a, 6a, extending parallel to the drive shaft 13 and having a circular cross section. The region inside the rim portion 6a of the accommodation hole 17 and the bottommost region of the heat generating chamber 7 communicate with each other via a communication passage 18 formed obliquely through the rim portion 6a.

The housing cover 2 is provided with a second electromagnetic solenoid 30. This electromagnetic solenoid 30 is
The housing lid 2 is housed in a case 32 attached to the outer surface of the housing lid 2 with a plurality of bolts 31. The electromagnetic solenoid 30 includes a lower solenoid coil 33 disposed in a case 32 and a core rod 34 as a rod disposed at the center thereof. The core rod 34 is attached to the housing lid 2 so as to be slidable back and forth, and the tip of the core rod 34 enters the housing hole 17. A sliding section 35 is fixed to the tip of the core rod 34.

The cross sectional shape of the sliding partition 35 is
This sliding section 35 is provided in the receiving hole 1.
7 can be slid back and forth in the housing hole 17 while being in close contact with the inner peripheral wall of the housing 7. And between the sliding partition 35 and the inner wall surface of the housing lid 2 in the accommodation hole 17,
A shelter 19 whose volume changes in accordance with the forward and backward movement of the sliding partition 35 is partitioned. Even when the core rod 34 projects forward and the sliding section 35 is at the foremost position (see FIG. 2) where the sliding section 35 is located at the frontmost position, the core rod 34 slides backward and slides backward. Even when the partitioning body 35 is at the rearmost position (see FIGS. 1 and 3) located rearmost, the partitioning body 35 is always in communication with the bottommost region of the heat generating chamber 7 via the communication passage 18. A coil spring 36 as an urging member is disposed between the sliding section 35 and the housing lid 2 in the escape room 19. The coil spring 36 is wound around the core rod 34 and urges the sliding section 35 and the core rod 34 forward. In the first embodiment, the lower solenoid coil 3
3. A driving means for the partition 35 is constituted by the core rod 34 as a rod body and the coil spring 36, and a volume changing means for changing the volume of the shunting chamber 19 is constituted by the partition 35 and the driving means thereof. Fluid level control means is constituted by the waiting room 19 and its volume variable means.

The heating chamber 7 and the auxiliary oil chamber 10 communicating with each other through the upper and lower communication holes 6d and 6e, and the escape chamber 19 communicating with the heating chamber 7 through the communication passage 18 are provided for the vehicle. A liquid-tight internal space is formed in the housing of the heat generator. This internal space is filled with a required amount of silicone oil as a viscous fluid. In the state shown in FIG. 1, when the rotor 14 rotates, silicone oil is supplied from the sub oil chamber 10 to the heat generating chamber 7 through the lower communication hole 6e and the guide groove 6f, and the upper oil communicates from the heat generating chamber 7 to the sub oil chamber 10. The silicone oil is recovered through the hole 6d.
Therefore, at the time of rotation of the rotor, oil exchange circulation may occur between the heat generating chamber 7 and the sub oil chamber 10.

Further, as shown in FIG. 2, the volume (maximum volume) of the waiting room 19 when the sliding section 35 is at the frontmost position.
When the rotor 14 is stopped and the sliding section 35 is in the last position (the state in which the volume of the evacuation chamber 19 is the smallest), the volume of the silicone oil remaining in the heat generating chamber 7 can be accommodated. Is set.

FIGS. 2 and 3 schematically show a control configuration of the vehicle heat generator of the first embodiment. The vehicle heat generator incorporates the control device 40 by itself or is connected to the control device 40 that is separate from the vehicle heat generator body. The control device 40 includes a heating chamber 7 and a sub oil chamber 10.
And controls the control of the circulation of the viscous fluid between the heating chamber 7 and the management of the residual amount of the viscous fluid in the heat generating chamber 7.
When the control device 40 is provided separately from the vehicle heat generator main body, an electronic control unit (ECU) of the vehicle engine E may have the function of the control device 40 together.

The control device 40 includes a CPU, a ROM, and a RAM.
And a control unit similar to a microcomputer having a built-in input / output interface (both not shown), and a control program stored in a ROM thereof in advance. This control device 40 is connected to various sensor groups 41. The categories of the sensors included in the sensor group 41 include a temperature sensor for detecting the temperature inside or outside the vehicle, a temperature sensor for detecting the temperature of the circulating water (engine cooling water) in the heating circuit, the heating chamber 7 or the auxiliary oil. A temperature sensor that detects the temperature of the viscous fluid in the chamber 10, a rotation speed sensor that detects the rotation speed (rotation speed) of the engine E, and a calculation that measures the rotation acceleration of the engine E based on data from the rotation speed sensor. Vessels and the like. The control device 40
It is connected to at least one selected from those included in the category of the sensor described above.

The sensor group 41 outputs data relating to temperature and data such as the engine speed as analog or digital detection signals. The control device 40 receives a signal from the sensor group 41. Further, the control device 40 is also connected to a heater switch / temperature setting device 42 provided in the vehicle compartment, and inputs various commands and control information. The heater switch / temperature setting device 42 is incorporated in an operation panel provided in the vehicle compartment, and the occupant instructs operation and stop (ON / OFF) of the heater, and sets a desired vehicle interior temperature. An input device for performing The control device 40
The solenoid coils 2 and 3 are connected to the upper and lower solenoid coils 23 and 33, respectively.
The energization control to 3, 33 is performed.

Next, the operation of the vehicle heat generator of the first embodiment will be described for each scene. (Scene 1: When the stopped engine E is started) When the vehicle engine E is stopped (rotation speed = 0 rpm), the pulley 16, the drive shaft 13, and the rotor 14 are also stopped. In this state, each solenoid coil 2
No energization control is performed on 3, 33, and as shown in FIG.
The distal end of the core rod 24 closes the lower communication hole 6e by the urging force of the coil spring 26, and the sliding section 35 is arranged at the foremost position by the urging force of the coil spring 36. In this case, most of the silicone oil (viscous fluid)
It is stored separately in the auxiliary oil chamber 10, the evacuation chamber 19 and the communication passage 18 whose capacity is increased, and almost no oil remains in the heat generating chamber 7. Therefore, the rotor 14 can easily rotate without being restrained by the high-viscosity oil. With the start of the vehicle engine E, the pulley 16,
The drive shaft 13 and the rotor 14 also start rotating, but as long as the heater switch 42 is selected to be OFF, the control device 40 does not perform any control and maintains the current state. Accordingly, the clearance between the outer surface of the rotor 14 and the inner wall surface of the heat generating chamber 7 is not filled with silicone oil, and no oil shearing occurs, so that no shear heat is generated.

The oil level in the sub oil chamber 10 at this time is below the upper communication hole 6d. The oil level (fluid level) in the heat generating chamber 7 is lower than the lowermost part of the rotor 14.

(Scene 2: Heater Operation After Starting Engine E) During the operation of the vehicle engine E, the heater switch 42 is turned off.
When the answer is N, the control device 40 starts energization control to the solenoid coils 23 and 33 to cause the vehicle heat generator to generate heat. That is, as shown in FIG. 3, an electromagnetic force is generated by energizing the upper solenoid coil 23, whereby the core rod 24 is retracted (moved to the open position) against the urging force of the coil spring 26, and the lower communication is performed. The hole 6e is opened. Thus, the silicone oil in the sub oil chamber 10 starts flowing into the heat generating chamber 7. Due to the retraction of the core rod 24, the oil in the sub oil chamber 10 enters the concave portion 25 at the distal end thereof. At the same time, an electromagnetic force is generated by energizing the lower solenoid coil 33, whereby the sliding section 35 is retracted to the last position (shown in FIG. 3) together with the core rod 34 against the urging force of the coil spring 36. As a result, the oil stored (evacuated) in the evacuation room 19 is transferred to the communication passage 1.
8, the oil level (fluid level) in the heat generating chamber 7 is raised above the lowermost part of the rotor 14, and the oil level in the heat generating chamber 7 is raised to the outermost peripheral area of the rotating rotor 14. Oil is supplied quickly.

Further, for a certain period immediately after the lower communication hole 6e is opened, the control device 40 repeats energization / interruption to the upper solenoid coil 23 several times (for example, 2 to 10 times). That is, immediately after the first energization to the upper solenoid coil 23, this energization is stopped. Then, the core rod 24, which has lost the suction by the electromagnetic force, is pushed forward by the coil spring 26, and the tip of the core rod 24 contacts the wall surface of the rear partition plate 6 (transition to the closed position of the core rod 24). Although the core rod 24 stops suddenly by this contact, the concave portion 25 at the tip of the core rod communicates with the lower communication hole 6e, and the oil in the concave portion 25 enters the heat generating chamber 7 through the lower communication hole 6e by inertia. Sent in.
In this way, the control device 40 repeats the energization and cutoff of the upper solenoid coil 23 a predetermined number of times determined by the control program, so that the core rod 24 repeats advancing and retreating multiple times. The continuous reciprocation of the core rod 24 is caused by the lower communication hole 6e.
Produces the action of pumping silicone oil into the interior. Such continuous movement of the valve body for the purpose of pumping the viscous fluid will be referred to as a pumping operation. After the end of the pumping operation, as long as an increase in the amount of heat generated by the heater is required, the power supply to the upper solenoid coil 23 is continued, and
Is held in the open position, and the lower communication hole 6e is maintained in the open state.

When the rotor 14 rotates, the lower communication hole 6 in the open state is formed due to its own weight and high viscosity of the silicone oil.
The oil is drawn out from the sub oil chamber 10 via e and the guide groove 6f. However, since the above-described pumping operation is performed further, the oil is quickly supplied from the sub oil chamber 10 to the heat generating chamber 7. Therefore, the oil spreads quickly and smoothly over the entire minute clearance between the outer surface of the rotor 14 and the inner wall surface of the heat generating chamber 7. Then, the oil is lifted up to the uppermost portion of the rotor 14 in a short time, and the oil is quickly recovered through the upper communication hole 6d. Therefore,
The oil exchange circulation between the heating chamber 7 and the sub oil chamber 10 is achieved in a short time.

The silicone oil filled in the clearance between the inner wall surface of the heat generating chamber 7 and the outer surface of the rotor 14 is sheared to generate heat. The heat generated in the heat generating chamber 7 is exchanged with the circulating water flowing through the front and rear water jackets 8 and 9, and the heated circulating water is used for heating the vehicle interior via a heating circuit (not shown). You.

(Scene 3: Feedback Control of Heater Heating Value) As long as the rotation of the pulley 16, the drive shaft 13, and the rotor 14 is maintained by the driving vehicle engine E and the heater switch 42 is turned ON, The control device 40 controls the heater through the energization control to the upper solenoid coil 23 so that the temperature in the vehicle compartment becomes close to the set temperature T set by the temperature setting device 42 while referring to various data from the sensor group 41. The calorific value is feedback controlled.

For example, when the temperature in the vehicle interior is lower than the set temperature T, the control device 40 retreats the core rod 24 by energizing the upper solenoid coil 23, and keeps the lower communication hole 6e open. Then, since the oil supply amount is larger than the oil recovery amount due to the inner diameter relationship between the lower communication hole 6e and the upper communication hole 6d, the oil amount in the heat generating chamber 7 gradually increases, and the outer surface of the rotor 14 and the heat generating chamber The entire clearance with the inner wall surface of 7 is filled with silicone oil. Thus, the shearing force of the oil is improved, and the calorific value tends to increase.

On the other hand, if the temperature in the vehicle interior exceeds the set temperature T due to an increase in the amount of heat generated by the heater, the control device 40
Stops the energization of the upper solenoid coil 23, advances the core rod 24, and closes the lower communication hole 6e. Then
While the oil supply from the sub oil chamber 10 to the heat generating chamber 7 is cut off, only the oil recovery through the upper communication hole 6d is performed, so that the amount of oil in the heat generating chamber 7 gradually decreases, and the rotor 14 becomes as if it were. As it approaches the idling state, the shearing force of the oil decreases and the calorific value also tends to decrease.

As described above, the amount of heat generation is variably adjusted by controlling the opening and closing of the lower communication hole (supply passage) 6e by the core rod (valve element) 24. In this sense, the heating chamber 7 and the sub oil chamber 10
Upper and lower communication holes 6d, 6e for communicating with
The electromagnetic solenoid 20 and the control device 40 provided with the above provide a capability variable configuration for variably controlling the heat generation capability of the vehicle heat generator.

When the heater switch 42 is turned off during the operation of the engine E, the control device 40 stops energizing the upper solenoid coil 23 and closes the lower communication hole 6e with the core rod 24. And the upper communication hole 6d
A considerable amount of oil is recovered from the heat generating chamber 7 to the sub-oil chamber 10 via the heat generating chamber 7, and the shear heat generated by the rotor 14 is virtually interrupted. Although the upper communication hole (recovery passage) 6 d is located near the drive shaft 13 and above the drive shaft 13, a considerable amount of oil is collected in the sub oil chamber 10 via the upper communication hole 6 d. The Weissenberg effect is greater than the centrifugal force acting on the oil when the rotor 14 is rotating at low speed because of the viscoelasticity of the silicone oil.
This is because there is a tendency for the oil inside to collect around the drive shaft 13.

(Scene 4: Stopping and restarting engine E) When the engine E is stopped, the pulley 16 and the drive shaft 1
3 and the rotor 14 also stop at the same time. If the heater switch 42 is in the ON state at that time despite the stop of the engine E (stop of the rotor 14), the controller 4
0, first, the power supply to the upper solenoid coil 23 is stopped, and the lower communication hole 6e is closed by the core rod 24. Then
At that time, the heating chamber 7 which was above the upper communication hole 6d
Is recovered into the sub oil chamber 10 via the upper communication hole 6d by its own weight.

Next, after a predetermined period of time (for example, 3 to 10 seconds) after the power supply to the upper solenoid coil 23 is stopped (ie, the lower communication hole 6e is closed), the controller 40 stops the power supply to the lower solenoid coil 33. Then, the electromagnetic attraction of the core rod (rod body) 34 is stopped. In this way, the sliding section 35 is switched to the foremost position (FIG. 2) by the action of the coil spring 36, and the evacuating chamber 19 has the maximum volume. Then, the silicone oil remaining in the heat generating chamber 7 flows into the evacuation chamber 19 through the communication path 18 based on its own weight and the synergistic effect of the negative pressure suction action accompanying the advance of the sliding section 35, and the heat generating chamber 7 The oil level at 7 drops below the bottom of the rotor 14.

As described above, the silicone oil is almost completely eliminated from the heat generating chamber 7. Therefore, even when the engine E is restarted thereafter, as described in the above-mentioned scene 1, since the rotor 14 is not restrained by the high-viscosity oil, the pulley 16 and the drive shaft 13
And the rotor 14 can be started smoothly.

The vehicle heat generator of the first embodiment has the following advantages. When the vehicle engine E, which is an external drive source, is stopped, the viscous fluid is introduced (pulled in or collected) into the waiting room 19 so that silicone oil (viscous fluid) does not remain in the heat generating chamber 7. Therefore, when the engine E is restarted, the rotor 14 is not restricted by the viscous fluid. In other words, the stopped pulley 16, the drive shaft 13, and the rotor 14
The load torque for starting is set to a no-load state or a minimum state. Therefore, an excessive startup shock does not occur when the engine E is restarted, and the occurrence of abnormal noise and the premature wear of members are also avoided.

In particular, even if the engine E is stopped with the heater switch 42 kept ON, the oil in the heat generating chamber 7 is evacuated to the evacuating chamber 19 to prepare for the subsequent restart of the engine E. Under any circumstances, the load torque for restarting the engine E can be reduced. Therefore, the V-belt 27 constituting the belt transmission mechanism
Is prevented from slipping on the pulley 16,
The replacement time of the V-belt 27 can be delayed.

When starting heat generation by shearing in the vehicle heat generator, the core rod 24 is caused to perform a plurality of pumping operations by controlling the power supply to the electromagnetic solenoid 20.
Therefore, when the oil supply from the heat generating chamber 7 to the sub oil chamber 10 is not stabilized, the silicone oil stored in the sub oil chamber 10 is supplied to the heat generating chamber 7 through the lower communication hole 6e.
Can be positively pumped. Therefore, the required amount of silicone oil can be filled into the heat generating chamber 7 very smoothly and quickly, and the heat generation capability can be quickly started.

The lower communication hole 6 is formed by a core rod 24 as a valve body.
By controlling the opening and closing of e, the amount of oil in the heat generating chamber 7 during rotation of the rotor 14 can be adjusted, and the heat generating capability of the heater can be variably controlled as needed.
Therefore, overheating of the silicone oil due to unnecessary heat generation in the heat generating chamber 7 is prevented, and mechanical deterioration due to thermal deterioration or shearing of the oil can be delayed as much as possible.

A recess 25 is formed at the tip of the core rod 24 as a valve body. This recess 25 is provided in the sub oil chamber 1
This contributes not only to the forced pressure feed of the silicone oil from 0 to the heat generating chamber 7 but also to the weight reduction of the core rod 24. Therefore, the inertia of the core rod 24 itself is reduced, and the core rod 24 can be reciprocated quickly and easily.

The first embodiment can be modified as follows. (Modification) In the above-described scene 3 (feedback control of the heat generation amount of the heater), the variable control of the heat generation amount of the heater is achieved only by controlling the forward / backward movement of the core rod 24 as the valve body. The oil amount in the heat generating chamber 7 may be adjusted in consideration of the forward / backward control to assist in the variable control of the heat generated by the heater. That is, when a quick decrease in the calorific value of the heater is required, the power supply to the lower solenoid coil 33 is stopped, and the sliding driving body 35 is advanced to the foremost position by the coil spring 36 to reduce the volume of the escape chamber 19. Expanding. As a result, the oil corresponding to the increase in the volume of the evacuation chamber 19 can be introduced from the heat generation chamber 7 into the evacuation chamber 19 via the communication passage 18, which contributes to a rapid decrease in the amount of oil in the heat generation chamber 7. be able to. In this way, by synchronizing the advance / retreat control of the sliding drive body 35 with the advance / retreat control of the core rod (valve element) 24, the amount of oil provided for shearing of the rotor 14 can be quickly reduced, and the heater heat generation amount can be reduced. Can be quickly reduced.

(Modification) In the above-described scene 3 (feedback control of the amount of heat generated by the heater), a fixed period (for example, 2 seconds) immediately after the lower communication hole 6e is changed from the closed state to the open state.
(5 seconds), the pumping operation by the core rod 24 may be performed. In this way, the silicone oil recovered from the heat generating chamber 7 and stored in the sub oil chamber 10 for a certain period of time to recover the viscoelasticity can be pressure-fed and supplied to the heat generating chamber 7 in a short time, and the heat generation amount rises sharply. Can be achieved. (Embodiment 2) FIGS. 4 and 5 show a vehicle heat generator according to Embodiment 2 of the present invention. This vehicle heat generator has the same basic configuration as that of the first embodiment, except for the configurations of the fluid level control means, the volume variable means and the valve means.
As a result, even though the control methods are substantially the same, the dynamics of each of the activated means are slightly different. Therefore, this difference will be mainly described.

As shown in FIGS. 4 and 5, the housing lid 2 is provided with an electromagnetic solenoid 50 as a drive source. The electromagnetic solenoid 50 is connected to the housing lid 2.
Is housed in a case 52 attached to the outer surface side by a plurality of bolts 51. The electromagnetic solenoid 50 includes a solenoid coil 53 disposed in a case 52 and a core rod 54 disposed at the center thereof. This core rod 54
, A coupling body 55 is attached to a tip end portion thereof with a bolt 56.

An upper core rod 57 as a valve body is attached to the upper end of the combined body 55 by bolts 58.
The front end of the upper mandrel 57 is disposed in the sub oil chamber 10, and the flange portion of the front end and the sub oil chamber 1
An upper coil spring 59 as an urging member is interposed between the inner coil wall and the inner wall of the zero. The upper core bar 57 is urged forward by the upper coil spring 59. Upper core rod 57
Similarly, a lower core rod 60 as a rod body is attached to the lower end of the combined body 55 by a bolt 61.
A sliding partition 62 is fixed to the front end of the lower core rod 60. Both of the sliding partitions 60 and 62 are lower coil springs 65 disposed between the sliding partition 62 and the housing lid 2. It is biased forward by

In the rims 5a and 6a of the front and rear partition plates 5 and 6 immediately below the bottom of the heat generating chamber 7, an escape chamber 63 for silicone oil is provided. The escape chamber 63 has an accommodation hole 64 formed at the bottom thereof with respect to the rim 5a. The cross sectional shape of the sliding section 62 matches that of the accommodation hole 64.

The core rod 54 can be switched between a retracted position (shown in FIG. 5) and an advanced position (shown in FIG. 4). Therefore, since the upper core rod 57 is connected to the core rod 54 through the coupling body 55, the lower communication hole 6e is switched between front and rear so as to be able to close and open the lower communication hole 6e at the distal end surface. Similarly, since the lower core rod 60 is also connected to the core rod 54 via the coupling body 55, the sliding partition 62 is
It can slide back and forth inside. Such a sliding section 6
The volume of the shelter 63 is changed according to the back-and-forth movement of 2.
In the second embodiment, an electromagnetic solenoid 50 is constituted by the solenoid coil 53, the core rod 54, and the coil springs 59 and 65, and the electromagnetic solenoid 50 constitutes a main part of a variable volume means and a valve means. Then, the solenoid coil 53 and the upper coil spring 59 constitute an operating mechanism of the valve element. The electromagnetic solenoid 50 and the lower core rod 60 as a rod form a driving means for the partition 62, and the partition 62 and its driving means form a variable volume means for changing the volume of the shunting chamber 63. Room 63
And the fluid volume control means constitute a fluid level control means. The control configuration of the vehicle heat generator of the second embodiment is the same as that of the first embodiment shown in FIGS.

Next, the operation of the vehicle heat generator of the second embodiment will be described. The vehicle engine E stops (rotation speed = 0 rpm)
In this case, as shown in FIG. 4, the urging force of the upper and lower coil springs 59 and 65 causes the core rod 54 to be disposed at the forward position. Accordingly, the upper core rod 57 closes the lower communication hole 6e. In addition, since the lower core rod 60 is disposed at the forefront position, the volume of the escape room 63 is maximized. In this case, most of the silicone oil (viscous fluid) is stored separately in the sub oil chamber 10 and the escape chamber 63. Therefore, the rotor 14 can easily rotate without being restrained by the high-viscosity oil.

When the heater switch 42 is turned on while the vehicle engine E is being driven, control of energizing the solenoid coil 53 is started. Thereby, the upper and lower coil springs 5
The core rod 54 moves to the retracted position against the urging force of 9, 65. Accordingly, the upper core rod 57 opens the lower communication hole 6e. Further, since the lower core rod 60 is retracted to the last position, the volume of the shelter 63 is reduced. Therefore, the silicone oil in the sub oil chamber 10 starts flowing into the heat generating chamber 7, and the oil stored (evacuated) in the standby chamber 19 is pushed out to the lowest region of the heat generating chamber 7. Therefore, the oil is quickly supplied to the central region and the outermost peripheral region of the rotating rotor 14.

Further, for a certain period immediately after the core rod 54 is retracted, the control device 40 repeats energization and cutoff of the solenoid coil 53 several times (for example, 2 to 10 times).
The pumping operation of the upper and lower core rods 57 and 60 is realized in order to repeatedly advance and retreat. Then, the oil quickly and smoothly spreads over the entire minute clearance between the outer surface of the rotor 14 and the inner wall surface of the heat generating chamber 7, and is sheared to generate heat.
The heat generated in the heat generating chamber 7 is exchanged with the circulating water flowing through the front and rear water jackets 8 and 9, and the heated circulating water is used for heating the vehicle interior via a heating circuit (not shown). You.

In the case of feedback control of the heat value of the heater, for example, when the air temperature in the vehicle interior falls below the set temperature T, the control device 40 retracts the core rod 54 by energizing the solenoid coil 53. Then, the upper core rod 57 keeps the lower communication hole 6e open, and the lower core rod 60 keeps the volume of the escape chamber 63 reduced. Then, the amount of oil in the heat generating chamber 7 increases, the shearing force of the oil increases, and the amount of heat generated tends to increase. On the other hand, when the temperature in the vehicle interior exceeds the set temperature T due to an increase in the amount of heat generated by the heater or the like, the control device 40 stops energizing the solenoid coil 53 and advances the core rod 54 forward. Then, the upper core rod 57 closes the lower communication hole 6e, and the lower core rod 60 enlarges the volume of the waiting room 63. In this way, the oil supply from the sub oil chamber 10 to the heat generating chamber 7 is shut off, and the silicone oil in the heat generating chamber 7 is collected in the sub oil chamber 10 or quickly stored in the standby chamber 63. For this reason, the amount of oil in the heat generating chamber 7 decreases, and the rotor 14 approaches an idling state, the shearing force of the oil decreases, and the amount of generated heat also tends to decrease.

When the heater switch 42 is turned off during the operation of the engine E, the control device 40 stops the energization of the solenoid coil 23 and the core rod 24 moves forward. The side communication hole 6e is closed, and the lower core rod 60 enlarges the volume of the waiting room 63. For this reason,
The oil moves from the heat generating chamber 7 to the sub oil chamber 10 and the shunting chamber 63, thereby effectively interrupting the shear heat generated by the rotor 14.

When the engine E is stopped, the pulley 16,
The drive shaft 13 and the rotor 14 also stop at the same time. If the heater switch 42 is ON at that time despite the stop of the engine E (the stop of the rotor 14), the control device 40 first stops the energization of the solenoid coil 53 and removes the core rod 54. Let go forward. For this reason, the upper core rod 57
Closes the lower communication hole 6e and collects the silicone oil into the sub oil chamber 10, and the lower core rod 60 accommodates the silicone oil by expanding the volume of the escape chamber 63. Then, the silicone oil remaining in the heat generating chamber 7 flows into the waiting room 63 based on its own weight and the synergistic effect of the negative pressure suction action accompanying the advance of the sliding partition 62, and the liquid level of the oil in the heat generating chamber 7. Is lower than the lowermost part of the rotor 14.

In this way, the silicone oil is almost completely removed from the heat generating chamber 7. Therefore, even when the engine E is restarted thereafter, as described above, the rotor 14 is not restrained by the high-viscosity oil, so that the pulley 16, the drive shaft 13, and the rotor 14 are smoothly moved simultaneously with the start of the engine E. Can be started.

According to the second embodiment configured as described above, the same effects as those of the first embodiment shown in FIGS. 1 to 3 can be obtained. The upper and lower core rods 57, 60 are
Is connected to the core rod 54 through the electromagnetic solenoid 5.
The single core rods 57 and 60 can be operated by one.
For this reason, the manufacturing cost of the vehicle heat generator can be reduced. In addition, if one electromagnetic solenoid 50 is controlled, the variable volume means and the valve means can be operated,
The control program can be simplified.

(Definition of terms) "Viscous fluid" means any medium that generates heat based on fluid friction under the shearing action of a rotor, and is limited to high-viscosity liquids and semi-fluids. Of course, it is not limited to silicone oil.

[0079]

As described above in detail, according to the heat generator for a vehicle according to the present invention, by changing the level of the viscous fluid in the heat generating chamber, the viscous fluid is discharged from the heat generating chamber immediately before the start of the rotor. Most can be eliminated. Therefore, it is possible to reduce the load torque at the time of starting the rotor as much as possible, to smoothly start the rotor, and to eliminate inconveniences such as generation of abnormal noise and early wear of members due to the load torque.

According to the present invention, the amount of the viscous fluid subjected to the shearing can be ensured to be larger to withstand long-term use and to prevent the viscous fluid from deteriorating due to overheating. Thus, a heat generator for a vehicle that can continuously exhibit heat generation performance as required can be provided.

Further, according to the ninth aspect of the present invention, the manufacturing cost can be reduced by reducing the number of members, and a control program for causing each unit to function can be simplified.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an outline of a vehicle heat generator according to a first embodiment.

FIG. 2 is a cross-sectional view showing the vehicle heat generator according to the first embodiment when it is not operated or when its capacity is suppressed.

FIG. 3 is a cross-sectional view showing the vehicle heat generator according to the first embodiment at the time of operation or at the time of capacity expansion.

FIG. 4 is a cross-sectional view showing the vehicle heat generator according to the second embodiment when it is not operating or when its capacity is suppressed.

FIG. 5 is a cross-sectional view showing a state in which the vehicle heat generator according to the second embodiment is operated or its capacity is expanded.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front housing main body, 2 ... Rear housing main body, 5
... front compartment plate, 6 ... rear compartment plate (1, 2,
5, 6 constitute a housing), 6d: an upper communication hole as a recovery passage, 6e: a lower communication hole as a supply passage,
7: Heat generation chamber, 8: Front water jacket as heat dissipation chamber, 9: Rear water jacket as heat dissipation chamber, 10
... Auxiliary oil chamber as storage chamber, 13 ... Drive shaft, 14 ... Rotor, 17 ... Accommodation hole, 18 ... Communication passage, 19 ... Evacuation room, 2
3 ... solenoid coil, 24 ... core rod as valve body, 26
... Coil springs as urging members (23, 26 constitute an operating mechanism, and 23, 24, 26 constitute valve means), 3
3 Solenoid coil, 34 core rod, 35 sliding section, 36 coil spring (33, 34, 36 constitute driving means, 33 to 36 constitute volume variable means, and 1
7, 18, 19, and 33 to 36 constitute fluid level control means), 40 ... control device, 50 ... electromagnetic solenoid as drive source, 53 ... solenoid coil, 54 ... core rod, 5
5: combined body, 57: upper core rod, 59: upper coil spring as an urging member (53, 59 constitute an operating mechanism, 53
55 to 57, 59 constitute valve means), 60: lower core rod, 62: sliding partition, 63: waiting room, 64: accommodation hole, 65: lower coil spring (53 to 55, 60, 59) 65 constitutes a driving means, 53-55,60,62,65 constitutes a volume changing means, and further comprises 53-55,60,62-6.
5 constitutes a fluid level control means).

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Nobuaki Hoshino 2-1-1 Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (72) Inventor Masahiko Okada 2-1-1 Toyota-cho, Kariya-shi, Aichi Stock Inside Toyota Industries Corporation

Claims (9)

[Claims] 1. A heat generating chamber and a heat radiating chamber partitioned in a housing, wherein a viscous fluid contained in the heat generating chamber is sheared by a rotor to generate heat, and the heat is converted into a circulating fluid flowing through the heat radiating chamber. A heat generator for a vehicle that performs heat exchange, comprising: fluid level control means for changing a fluid level of a viscous fluid in the heat generating chamber, wherein the fluid level control means is disposed below the heat generating chamber. A heat generator for a vehicle comprising a variable-volume refuge chamber connected to the heat-generating chamber. 2. The fluid level control means changes a volume of the waiting room to introduce a viscous fluid from the heating room to the waiting room and to lead a viscous fluid from the waiting room to the heating room. The heat generator for a vehicle according to claim 1, further comprising a volume changing means that enables the heat generation. 3. A partition body movably provided in a housing hole formed in a housing below the heat generating chamber and partitioning and forming the refuge chamber in the housing hole. 3. The vehicle heat generator according to claim 2, further comprising a driving unit for moving the partition. 4. The fluid level control means decreases a fluid level of a viscous fluid remaining in the heat generating chamber from a lowermost portion of the rotor in the heat generating chamber and raises the fluid level to a level higher than a lowermost portion of the rotor. The heat generator for a vehicle according to claim 2 or 3, wherein the heat generation is possible. 5. The fluid level control means is connected to a control device, and the control device is connected to the evacuation chamber from the heat generating chamber when an external drive source operatively connected to the rotor stops driving. Allow the introduction of viscous fluid into the
The fluid level control means is controlled so that the viscous fluid can be led out from the refuge chamber to the heat generating chamber when the external drive source starts driving.
The vehicle heat generator according to any one of claims 1 to 4. 6. The heat generator for a vehicle according to claim 1, wherein the heat generating chamber is partitioned in the housing to additionally contain a viscous fluid, and further includes a supply passage and a recovery passage. A heat generator for a vehicle, further comprising a storage chamber communicating with the supply passage, and valve means for controlling opening and closing of the communication state of the supply passage. 7. The vehicle according to claim 6, wherein the valve means includes a valve disposed in the storage chamber to open or close the supply passage, and an operating mechanism for operating the valve. For heat generator. 8. The operating mechanism is connected to a control device, and the control device moves the valve body between the closed position and the open position for a certain period immediately after the supply passage is shifted from the closed state to the open state. The heat generator for a vehicle according to claim 7, wherein the operation mechanism is controlled so as to be continuously switched between the heat generators. 9. The vehicle heat generator according to claim 2, wherein the volume variable means is movably provided in a housing hole formed in a housing below the heat generating chamber, and is provided in the housing. The heat generator further includes a partition body that defines the waiting room in the hole, the heat generator further includes a viscous fluid that is partitioned in the housing, and communicates with the heat generating chamber via a supply passage and a recovery passage. A storage chamber, and valve means for controlling opening and closing of the communication state of the supply passage, wherein the valve means includes a valve element disposed in the storage chamber to open or close the supply passage; A heat generator for a vehicle, wherein a body and the valve body are operatively connected to a common drive source via a coupling body.