JPH106758A - Flow adjusting method and device in heating system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the reliability in a heating capacity variable type heating unit which is operated by the driving force of an external driving source and also having a minimum heating capacity, not a zero. SOLUTION: A solenoid on-off valve 45 is interposed on a heating channel 131 lying between a viscous heater 22 and a radiator 21. In addition, a bypass channel 46 is connected to this heating channel 131 between the viscous heater 22 and the radiator 21 so as to have a parallel relation with the solenoid on-off valve 45. A passing sectional area in the bypass channel 46 is made to be smaller than that at the side of the heating channel 131. In a state that a heating switch 44 is turned off, the solenoid on-off valve 45 is closed, whereby water being delivered out of the viscous heater 22 flows in the bypass channel 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a heating device of a variable heating capability having a minimum non-zero heating capability, which is operated by the driving force of an external driving source, and supplies a circulating fluid to the heating device. The present invention relates to a method and an apparatus for adjusting a flow rate in a vehicle heating device that heats and supplies the heated circulating fluid to a radiator to heat a vehicle interior.

[0002]

2. Description of the Related Art A heating device of this kind is disclosed in Japanese Patent Laid-Open No. 6-9213.
No. 4 discloses this. In this conventional device, a viscous heater that generates heat by stirring a viscous fluid is used as an auxiliary heating device. The viscous heater obtains a driving force from a vehicle engine via an electromagnetic clutch. A water temperature sensor is mounted on a water passage passing through the viscous heater, and the electromagnetic clutch is controlled by a control unit based on the result of water temperature detection by the water temperature sensor. When the water temperature is lower than the set value, the electromagnetic clutch is turned on, and the viscous heater generates heat. When the water temperature is equal to or higher than the set value, the electromagnetic clutch is turned off, and the viscous heater is in a non-heating state. Therefore, if the temperature of the cooling water that has taken heat from the vehicle engine is too low to be used for heating the vehicle interior, the viscous heater assists the heating of the vehicle interior.

[0003] Air cooled by a cooler of a refrigerating cycle is sent to the radiator, and the cooled air is heated by the radiator and supplied to the vehicle interior.
An electromagnetic valve is provided upstream of the radiator. During the maximum cooling operation, the electromagnetic valve is closed, and the water supply from the viscous heater to the radiator is stopped. By stopping such water supply, the maximum cooling capacity is ensured.

[0004]

However, in the case where a heating device of a variable heating capacity type which is operated by the driving force of the vehicle engine and has a non-zero minimum heat generation capability is used, the vehicle engine may be in operation. If the heat generating device is in the minimum heat generating capability state, heat is generated. If the electromagnetic valve is in a closed state, water does not flow from the heating device to the radiator,
As the temperature of the heating device increases, the internal pressure increases. Such a rise in temperature and increase in internal pressure hasten the deterioration of the seal to prevent leakage of viscous fluid, water, etc.,
The reliability of the heating device decreases.

An object of the present invention is to improve the reliability of the above-described heating device.

[0006]

For this purpose, the present invention comprises a heating device of a variable heating capacity which is operated by the driving force of an external driving source and has a non-zero minimum heating capacity, and circulates the circulating fluid to the heating device. The present invention is directed to a heating device for a vehicle that supplies heat to a radiator and supplies the heated circulating fluid to a radiator to heat a vehicle interior. In the case where the flow rate adjusting means for adjusting the supply flow rate to the radiator is interposed on the heating fluid path, the supply flow rate in the specific non-heating state when the heating of the vehicle interior is not performed is performed when the heating of the vehicle interior is performed. The circulation flow rate, which is smaller than the supply flow rate and passes through the heating device, is not set to zero.

[0007] The specific non-heating state is, for example, a state in which heating of the vehicle interior is not performed or a state in which cooling is performed. In such a specific non-heating state, the supply flow rate in the flow rate adjusting means is smaller than the supply flow rate when heating the passenger compartment, but the circulating flow rate passing through the heating device does not become zero. Therefore, the temperature rise in the heating device is suppressed, and the reliability of the heating device is improved.

Further, in a specific non-heating state, a decrease in cooling capacity during cooling is reliably prevented. According to the second aspect of the present invention, a flow rate adjusting means interposed on a heating fluid passage from the heat generating device to the radiator to adjust a supply flow rate to the radiator, and a specific non-heating when the vehicle interior is not heated A flow control device includes a switching control unit that switches the flow control unit between a first adjustment state that provides a supply flow rate in a state and a second adjustment state that provides a supply flow rate when heating the vehicle interior. The supply flow rate corresponding to the first adjustment state is smaller than the supply flow rate corresponding to the second adjustment state, and the circulating flow rate passing through the heating device is not set to zero.

When a specific non-heating state is reached in which heating of the passenger compartment is not performed, the switching control means switches the flow rate adjusting means from the second adjustment state to the first adjustment state. By this switching, the supply flow rate in the flow rate adjusting means becomes smaller than the supply flow rate when heating the vehicle interior, but the circulating flow rate passing through the heating device does not become zero. Therefore,
The temperature rise in the heating device is suppressed, and the reliability of the heating device is improved.

According to the fifth aspect of the present invention, a flow rate switching means interposed on a heating fluid path from the heating device to the radiator, and the heating fluid path is provided in parallel with the flow rate switching means. A flow regulating device comprising a connected bypass fluid path, and a passage cross-sectional area of the bypass fluid path that is smaller than a non-zero minimum cross-sectional area on the heating fluid path side between the flow rate switching means and the radiator. I made it smaller.

In a specific non-heating state in which heating of the vehicle interior is not performed, the circulating fluid passing through the heating device flows to the radiator through the bypass fluid path. In the invention according to claim 6, a flow rate switching means interposed on a heating fluid path from the heating device to the radiator, and the heating fluid path is provided in parallel with the flow rate switching means and the radiator. The flow rate adjusting means provided with the connected bypass fluid path was constituted.

In a specific non-heating state in which heating of the vehicle interior is not performed, the circulating fluid passing through the heating device flows downstream of the radiator via the bypass fluid passage. Since the circulating fluid that has passed through the heat generating device does not flow into the radiator, a decrease in cooling capacity during cooling is reliably prevented.

According to the seventh aspect of the present invention, a bypass fluid passage is connected upstream of a radiator for cooling a circulating fluid supplied from an external drive source. In a specific non-heating state in which heating of the vehicle interior is not performed, the circulating fluid that has passed through the heat generating device flows upstream of the radiator via the bypass fluid passage. Since the circulating fluid that has passed through the heat generating device does not flow into the radiator, a decrease in cooling capacity during cooling is reliably prevented.

In the invention of claim 8, an electromagnetic on-off valve is employed as the flow rate switching means. In a specific non-heating state in which the interior of the vehicle is not heated, the electromagnetic on-off valve is closed, and the circulating fluid passing through the heat generating device passes through the bypass fluid path.

According to a ninth aspect of the present invention, there is provided a flow rate adjusting means comprising a direction switching means interposed on a heating fluid path from the heating device to a radiator, and a bypass fluid path branched and connected to the direction switching means. The passage cross-sectional area on the bypass fluid passage side is smaller than the passage cross-sectional area on the heating fluid passage side.

In a specific non-heating state in which heating of the vehicle interior is not performed, the direction switching means switches to a state in which the circulating fluid is sent to the bypass fluid passage, and the circulating fluid passing through the heat generating device passes through the bypass fluid passage. .

According to the tenth aspect of the present invention, a housing that forms a heat-generating chamber and a heat-radiating chamber adjacent to the heat-generating chamber for circulating a circulating fluid, and is rotatably supported by the housing via a bearing device. A viscous heater having a rotating shaft, a rotor rotatably provided in the heating chamber by the rotating shaft, and a viscous fluid interposed in the heating chamber and heated by the rotation of the rotor is employed as the heating device. .

The viscous heater is compact and has high heat generation efficiency. The compactness of the viscous heater is advantageous in reducing the size of the entire heating device including the flow rate adjusting means. The invention according to claim 11 employs a viscous heater that includes a storage chamber that communicates with the heat generation chamber in the central region of the rotor, and that recovers the viscous fluid in the heat generation chamber into the storage chamber at least by the Weissenberg effect when the heat generation capacity is reduced.

In a specific non-heating state in which heating of the vehicle interior is not performed, the capacity of the viscous fluid in the heating chamber is minimized, and the heat generation capacity is minimized. At this time, the supply flow rate in the flow rate adjusting means is smaller than the supply flow rate when heating the vehicle interior, but the circulation flow rate passing through the viscous heater does not become zero. Therefore, the temperature rise in the heating device is suppressed, and the reliability of the heating device is improved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 to 3, a vehicle engine 11 as an external drive source is cooled by a cooling water as a circulating fluid flowing back through a water passage 13 by a water pump 12. The cooling water circulating through the water channel 13 is
At 4, heat is taken away by the blowing action of the cooling fan 15. The cooling fan 15 is an electric fan. A heating water channel 131 is provided between the water channel 13 and the vehicle engine 11 as a heating fluid channel, and the water temperature sensor 17 is attached to the heating water channel 131. The water temperature sensor 17 detects the temperature of the cooling water flowing in the heating water passage 131.
The cooling fan 15 receives the operation control of the cooling control unit 18, and the cooling control unit 18 controls the operation of the cooling fan 15 based on the temperature detection information obtained from the water temperature sensor 17. If the water temperature detected by the water temperature sensor 17 does not reach the preset water temperature, the cooling control unit 18
When the detected water temperature has reached the set water temperature without operating the cooling water cooling unit 18, the cooling control unit 18 operates the cooling fan 15.

A radiator 21 and a viscous heater 22 are interposed on the heating water channel 131. Water channel 131 for heating
The cooling water flowing through the heat sink is deprived of heat by the radiator 21 by the blowing action of the fan 23. The fan 23 is an electric fan, and the air blown by the fan 23 is sent into the vehicle interior.

An evaporator 39 constituting a refrigeration circuit is interposed between the radiator 21 and the fan 23. Evaporator 39
The air cooled by the fan 23 is sent into the vehicle interior by the fan 23. The refrigerant compressed by the compressor 40 constituting the refrigeration circuit is returned to the compressor 40 via the condenser 41, the expansion valve 42 and the evaporator 39. The compressor 40 is an electromagnetic clutch 5
9 is operatively connected to the vehicle engine 11. The electromagnetic clutch 59 is subjected to excitation / demagnetization control by the cooling control unit 60. The cooling control unit 60 controls the electromagnetic clutch 59 and the fan 23 based on the temperature information obtained from the temperature sensor 24 that detects the temperature of the air sent into the vehicle interior via the evaporator 39 under the ON state of the cooling switch 61. ON-OFF
Control.

The structure of the viscous heater 22 will be described. A partition plate 27 having excellent heat conductivity is interposed between the front housing 25 and the rear housing 26, and the front housing 25 and the rear housing 26 are bolts 28.
Is fastened and joined to the partition plate 27. A rubber seal ring 47 is interposed between the outer periphery of the front housing 25 and the outer periphery of the partition plate 27.

The space between the partition plate 27 and the front housing 25 is partitioned as a heat generating chamber 29, and the space between the partition plate 27 and the outer periphery of the rear housing 26 is partitioned as a water jacket 30 as a heat radiating chamber. . The water jacket 30 has an inlet port 261 and an outlet port 26.
The cooling water flowing from the vehicle engine 11 to the heating water passage 131 flows into the water jacket 30 through the water inlet port 261 and flows out of the water discharge port 262 through the water passage 131. The water flowing out of the water jacket 30 goes to the radiator 21.

A rotating shaft 31 is rotatably supported by the front housing 25 via a radial bearing 32 as a bearing device. The rotating shaft 31 is directly connected to the vehicle engine 11 without using a clutch. Rotary axis 3
A disk-shaped rotor 33 is fixed to the inner end of the rotor 1. The rotor 33 is housed in the heat generating chamber 29, and a viscous fluid made of silicone oil is put in the heat generating chamber 29. A lip seal mechanism 34 between the front housing 25 and the rotating shaft 31 prevents leakage of viscous fluid along the peripheral surface of the rotating shaft 31.

The storage chamber 16 is defined between the rear housing 26 and the radial center of the partition plate 27. The storage chamber 16 contains a viscous fluid. The capacity of the viscous fluid contained in the heating chamber 29 and the storage chamber 16 is
And the storage chamber 16 is smaller than the minimum volume. A cutout hole 271 and a return hole 272 are formed in the partition plate 27. The vent hole 271 and the return hole 272 connect the heating chamber 29 and the storage chamber 16. The distance from the rotation center of the rotation shaft 31 to the hole 271 is shorter than the distance from the rotation center of the rotation shaft 31 to the return hole 272.

A ventilation cylinder 19 is attached to the rear housing 26, and a spool 20 is slidably supported by the ventilation cylinder 19. The spool 20 is connected to the ventilation tube 19 by pins 35 erected on the inner end surface of the rear housing 26.
Is prevented from turning around. Vent cylinder 19 and spool 2
A compression spring 36 is interposed between the compression spring 36 and zero. The compression spring 36 urges the spool 20 toward the partition plate 27 side. A negative pressure generating pump 37 is connected to the ventilation tube 19 via an electromagnetic valve 38. The negative pressure generating pump 37 operates by receiving driving force from the vehicle engine 11.

An electromagnetic on-off valve 45 is interposed on the heating water passage 131 between the viscous heater 22 and the radiator 21. A bypass water passage 46 as a bypass fluid passage is connected to the heating water passage 131 between the viscous heater 22 and the radiator 21 so as to have a parallel relationship with the electromagnetic on-off valve 45. That is, the branch point between the heating water channel 131 and the bypass water channel 46 is located upstream of the electromagnetic on-off valve 45, and the junction between the heating water channel 131 and the bypass water channel 46 is between the electromagnetic on-off valve 45 and the radiator 21. The passage cross-sectional area in the bypass water passage 46 is smaller than the passage cross-sectional area on the heating water passage 131 side between the branch point and the junction.

Fan 23, solenoid valve 38 and solenoid on-off valve 4
5 receives the switching control of the heating control unit 43. A heating switch 44 is signal-connected to the heating control unit 43. The heating control unit 43 controls the operation of the fan 23 and the demagnetization of the electromagnetic valve 38 based on the water temperature information from the water temperature sensor 17 under the ON state of the heating switch 44. The heating control unit 43 turns on the heating switch 44 to turn on the electromagnetic opening / closing valve 45.
, And the electromagnetic switch 45 is demagnetized by turning off the heating switch 44.

In FIGS. 2 and 3, the heating switch 4 is used.
4 is in the ON state. When the water temperature detected by the water temperature sensor 17 reaches the first temperature T1 set in advance, the heating control unit 43 demagnetizes the solenoid valve 38, and as shown in FIG. Communicates with the atmosphere through
Therefore, the inside of the ventilation tube 19 becomes equivalent to the atmospheric pressure, and the spool 20 is pressed against the partition plate 27 by the action of the atmospheric pressure and the spring force of the compression spring 36. By this pressing, the spool 20 closes the return hole 272. The viscous fluid in the heat generating chamber 29 is removed at least by the Weissenberg effect.
The viscous fluid is discharged from the storage chamber 16 to the storage chamber 16 and the volume of the viscous fluid in the heating chamber 29 is reduced. Therefore, the viscous heater 24
Calorific value decreases in

When the water temperature detected by the water temperature sensor 17 reaches a preset second temperature T2 (<T1), the heating control unit 43 excites the electromagnetic valve 38, and the inside of the ventilation cylinder 19 is switched to the electromagnetic valve 38. Through the negative pressure generating pump 37.
Therefore, the inside of the ventilation tube 19 becomes lower than the atmospheric pressure, and the spool 20 is separated from the partition plate 27. This separation opens the return hole 272. The viscous fluid in the heat generating chamber 29 is discharged from the drain hole 271 to the storage chamber 16.
The viscous fluid in the inside is returned to the heat generating chamber 29 from the return hole 272 in an amount equal to or more than the release amount from the drain hole 271 to the storage chamber 16. Therefore, the capacity of the viscous fluid in the heat generating chamber 29 increases, and the amount of heat generated in the viscous heater 22 increases.

The spool 20, the compression spring 36, the solenoid valve 38, and the negative pressure generating pump 37, which are means for opening and closing the return hole 272, constitute a variable capacity means capable of adjusting the volume of the viscous fluid in the heat generating chamber 29. That is, the viscous heater 22 is a heating device with a variable heating capability having a minimum non-zero heating capability.

As shown in FIGS. 2 and 3, when the heating switch 44 is in the ON state, the electromagnetic on / off valve 45 is in the open state, and the water sent from the viscous heater 22 is supplied to the electromagnetic on / off valve 45.
And the water is sent to the radiator 21 through both the bypass water channel 46. As shown in FIG. 1, the heating switch 44 is turned off.
In the F state, both the solenoid valve 38 and the solenoid on-off valve 45 are in the demagnetized state. Due to the demagnetization of the electromagnetic valve 38, the heat generating capability of the viscous heater 22 is in a minimum state, and the demagnetization of the electromagnetic on-off valve 45 causes the electromagnetic on-off valve 45 to be in a closed state. Therefore, the water sent from the viscous heater 22 is supplied to the bypass passage 4
6 and sent to the radiator 21.

The first embodiment has the following advantages. (1-1) When the above-described refrigeration circuit is operated to cool the vehicle interior, the heating switch 44 is naturally turned off.
State. However, the variable heat generation type viscous heater 22 has the lowest heat generation ability in the operating state of the vehicle engine 11 even when the heating switch 44 is in the OFF state. Therefore, when there is no flow of water in the heating water passage 131, the temperature of the viscous heater 22 rises, and the lip seal mechanism 34 and the seal ring 47 deteriorate early.

The cross-sectional area of passage in the bypass channel 46 is
The passage cross-sectional area in the heating water passage 131 on the side of the solenoid on-off valve 45 is made smaller. The amount of water supplied from the viscous heater 22 to the radiator 21 (that is, the supply flow rate of the circulating fluid) when the electromagnetic valve 45 is OFF is smaller than the amount of water supplied when the electromagnetic valve 45 is ON. That is, in a specific non-heating state in which heating of the vehicle interior is not performed, the amount of water supplied from the viscous heater 22 to the radiator 21 is smaller than the amount of water supplied when heating the vehicle interior. The electromagnetic on-off valve 45 and the bypass water passage 46 constitute a flow rate adjusting means for adjusting the amount of water supplied from the viscous heater 22 as a heat generating device to the radiator 21. Then, the electromagnetic on-off valve 45 serves as a flow rate switching means constituting a flow rate adjusting means.

The OFF state of the heating switch 44 is a non-heating state, and the ON state of the heating switch 44 is a heating state. The OFF state of the solenoid on-off valve 45 is a first adjustment state that provides a supply amount of water in a non-heating state, and the ON state of the solenoid on-off valve 45 is a second adjustment state that provides a supply amount of water when heating the vehicle interior. is there. The heating control unit 43 serves as switching control means for switching the adjustment state of the electromagnetic on-off valve 45.

In the non-heating state, the amount of water supplied from the viscous heater 22 to the radiator 21 becomes smaller than the amount of water supplied when heating the vehicle interior, but the temperature rise in the viscous heater 22 is suppressed. As a result, early deterioration of the lip seal mechanism 34 and the seal ring 47 is avoided, and the reliability of the viscous heater 22 is improved. If the passage cross-sectional area in the bypass water passage 46 is set to such an extent that the temperature of the viscous heater 22 does not rise in the lowest heat generation capacity state, the effect of preventing the lip seal mechanism 34 and the seal ring 47 from being early deteriorated is the highest. (1-2) Viscous heater 22 employed as heat generating device
Is compact and has high heat generation efficiency. Viscous heater 22
The compactness is advantageous in reducing the size of the entire heating apparatus including the flow rate adjusting means. (1-3) Since the amount of water passing through the viscous heater 22 during non-heating is limited to the amount passing through the bypass water passage 46,
When the heat generation capability of the viscous heater 22 is not at a minimum, the temperature of the viscous heater 22 rises significantly. When the heat generation capacity is reduced, the variable heat generation capacity type viscous heater 22 that recovers the viscous fluid from the heat generation chamber 29 to the storage chamber 16 via the hole 271 that becomes a communication path by the Weissenberg effect easily reduces the heat generation capacity quickly. Therefore, the heating switch 44
Is switched from the ON state to the OFF state, the heat generation capability of the viscous heater 22 quickly shifts to the minimum state, and the temperature rise in the viscous heater 22 is suppressed.

Next, a second embodiment shown in FIG. 4 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a bypass water passage 48 as a bypass fluid passage is connected to the heating water passage 131 so as to have a parallel relationship with the electromagnetic on-off valve 45 and the radiator 21. That is, the branch point between the bypass water channel 48 and the heating water channel 131 is located upstream of the electromagnetic on-off valve 45, and the junction of the bypass water channel 48 and the heating water channel 131 is located downstream of the radiator 21. The passage cross-sectional area in the bypass passage 48 is approximately equal to the passage cross-section in the bypass passage 46 in the first embodiment.

The following effects can be obtained in the second embodiment. (2-1) The same effect as in the first embodiment can be obtained. (2-2) The heating water sent from the viscous heater 22 does not pass through the radiator 21. Therefore, when the refrigeration circuit is operating, only the air cooled by the evaporator 39 is sent into the vehicle interior, and the cooling efficiency is not reduced by the water heated by the viscous heater 22.

Next, a third embodiment shown in FIG. 5 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a bypass water passage 49 as a bypass fluid passage is connected to the heating water passage 131 and the water passage 13. That is, the bypass channel 49 and the heating channel 1
The junction with 31 is upstream of the electromagnetic on-off valve 45, and the junction of the bypass channel 49 and the channel 13 is upstream of the radiator 14. The passage cross-sectional area in the bypass channel 49 is the first
The cross-sectional area of the bypass water passage 46 in this embodiment is approximately equal to the cross-sectional area.

According to the third embodiment, the following effects can be obtained. (3-1) The same effect as in the second embodiment can be obtained. (3-2) When the cooling fan 15 is operating, the water heated by the non-heating viscous heater 22 is cooled by the radiator 14, and unnecessary temperature rise of the cooling water during non-heating is suppressed. You.

Next, a fourth embodiment shown in FIG. 6 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, a bypass water passage 50 as a bypass fluid passage is connected to the heating water passage 131 and the vehicle engine 11. The passage cross-sectional area in the bypass passage 50 is approximately equal to the passage cross-section in the bypass passage 46 in the first embodiment.

The following effects can be obtained in the fourth embodiment. (4-1) The same effect as in the second embodiment can be obtained. Next, a fifth embodiment of FIG. 7 will be described. The same components as those in the first embodiment are denoted by the same reference numerals.

In this embodiment, a bypass water passage 511 is formed in the electromagnetic on-off valve 51 as a bypass fluid passage. The passage cross-sectional area in the bypass channel 511 is the first
The cross-sectional area of the bypass water passage 46 in this embodiment is approximately equal to the cross-sectional area.

In the fifth embodiment, the following effects can be obtained. (5-1) The same effect as in the first embodiment can be obtained. (5-2) The configuration in which the bypass water passage 511 is provided in the electromagnetic on-off valve 51 eliminates the need for an extra pipe for the bypass water passage.

Next, a sixth embodiment shown in FIGS. 8 to 10 will be described. The same components as those in the second embodiment are denoted by the same reference numerals. A cylindrical portion 273 is formed on the partition plate 27 of the viscous heater 52 in this embodiment, and a spool 53 is slidably accommodated in the cylindrical portion 273. The spool 53 is urged by a compression spring 55 in a direction away from the circlip 56. The solenoid 54 is assembled in the cylindrical portion 273. The solenoid 54 is subjected to excitation / demagnetization control by the heating control unit 43. The excitation of the solenoid 54 causes the spool 53 to abut against the circlip 56 against the spring force of the compression spring 55. Solenoid 5
If 4 is demagnetized, the spool 53 is separated from the circlip 56 by the spring force of the compression spring 55. Therefore, the volume in the storage chamber 57 between the rotating shaft 31 and the spool 53 changes by switching the excitation and demagnetization of the solenoid 54. The capacity of the viscous fluid contained in the heating chamber 29 and the storage chamber 57 is smaller than the minimum volume of the heating chamber 29 and the storage chamber 57.

A direction switching valve 58 is interposed on the heating water channel 131 between the viscous heater 52 and the radiator 21, and the direction switching valve 58 is branched and connected to the bypass water channel 48. The bypass water passage 48 is connected to the heating water passage 131 downstream of the radiator 21. The direction switching valve 58 receives the excitation / demagnetization control of the heating control unit 43.

9 and 10, the heating switch 44 is in the ON state. The heating control unit 43 controls the solenoid valve 38 of the first embodiment under the ON state of the heating switch 44.
Excitation and demagnetization control similar to the above is performed on the solenoid 54. When the solenoid 54 is demagnetized, the spool 53 separates from the circlip 56 as shown in FIG. 10, and the volume of the storage chamber 57 becomes maximum. Therefore, the capacity of the viscous fluid in the heat generating chamber 29 is minimized, and the heat generating capability of the viscous heater 52 is minimized. When the solenoid 54 is excited, the spool 53 contacts the circlip 56 as shown in FIG. Therefore, the capacity of the storage chamber 57 is minimized, and the capacity of the viscous fluid in the heat generating chamber 29 is maximized. for that reason,
The heat generation capacity of the viscous heater 52 is maximized. The spool 53, the solenoid 54, and the compression spring 55 constitute a capacity variable unit that can adjust the capacity of the viscous fluid in the heat generating chamber 29.

When the heating switch 44 is ON, the heating control unit 43 excites the direction switching valve 58. When the direction switching valve 58 is excited, the heating water channel 131 downstream of the direction switching valve 58 communicates with the heating water channel 131 upstream of the direction switching valve 58, and water sent from the viscous heater 52 is sent to the radiator 21. Heating switch 4
When 4 is in the OFF state, the heating control unit 43 demagnetizes the direction switching valve 58. When the direction switching valve 58 is demagnetized, the bypass water passage 48 communicates with the heating water passage 131 upstream of the direction switching valve 58, and the water sent from the viscous heater 52 is sent downstream of the radiator 21 via the bypass water passage 48. The direction switching valve 58 serves as a direction switching unit that constitutes a flow rate adjusting unit.
The bypass water path 48 constitutes a flow rate adjusting means.

In the sixth embodiment, the same effects as in the second embodiment can be obtained. The bypass water passage branched and connected to the direction switching valve 58 may be connected to the heating water passage 131 upstream of the radiator 21.

In the present invention, a flow control valve may be used in place of the electromagnetic on-off valve 45, or a flow control valve for ensuring a minimum non-zero flow rate may be used in place of the electromagnetic on-off valve 51.
Further, in the present invention, the case where the cooling circuit is operated is set to a specific non-heating state when the heating of the vehicle interior is not performed, and the amount of water supplied from the heat generating device to the radiator when the cooling circuit is operated is minimized. You may.

Further, according to the present invention, the apparatus is operated by the driving force of a vehicle engine such as a gear pump heater and an eddy current heater,
Further, the present invention may be applied to a vehicle using a heating device of a variable heating capability having the lowest heating capability.

[0054]

As described in detail above, according to the present invention, in a specific non-heating state in which heating of the vehicle interior is not performed, the supply flow rate from the heating device of the variable heating capacity to the radiator is used to control the heating of the vehicle interior. Since the number of the heat generation devices is reduced as compared with the case where the heat generation is performed, there is an excellent effect that the reliability of the heat generating device can be improved.

[Brief description of the drawings]

FIG. 1 shows a first embodiment, in which a heating switch is OF
F, the heating system diagram in which the electromagnetic on-off valve is in the OFF state.

FIG. 2 is a heating system diagram in which a heating switch is ON, a solenoid on-off valve is ON, and a solenoid valve is OFF.

FIG. 3 is a heating system diagram in which a heating switch is ON, a solenoid on-off valve is ON, and a solenoid valve is in an ON state.

FIG. 4 is a heating system diagram showing a second embodiment.

FIG. 5 is a heating system diagram showing a third embodiment.

FIG. 6 is a heating system diagram showing a fourth embodiment.

FIG. 7 is a heating system diagram showing a fifth embodiment.

FIG. 8 shows a sixth embodiment, wherein the heating switch is OF
F, and the heating system diagram in which the direction switching valve is in a demagnetized state.

FIG. 9 is a heating system diagram in which a heating switch is ON, a direction switching valve is in an excited state, and a solenoid is in an excited state.

FIG. 10 is a heating system diagram in which a heating switch is ON, a direction switching valve is in an excited state, and a solenoid is in a demagnetized state.

[Explanation of symbols]

131: heating water channel serving as heating fluid channel; 14: radiator; 21: radiator; 22, 52: viscous heater;
3 ... Heating control unit as switching control means, 45 ... Electromagnetic on-off valve as flow rate switching means, 46, 48, 49, 5
0, 511: bypass water passage serving as a bypass fluid passage, 51
... electromagnetic on-off valve, 58 ... directional switching valve.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tatsuya Hirose 2-1-1, Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation

Claims (11)

[Claims] 1. A heating device of a variable heating capacity which is operated by a driving force of an external driving source and has a non-zero minimum heating capacity, supplies a circulating fluid to the heating device and heats the circulating fluid. A heating device for heating the vehicle interior by supplying the circulating fluid to the radiator, wherein a flow rate adjusting means for adjusting a supply flow rate to the radiator is provided on a heating fluid path from the heating device to the radiator. Aside
A heating device for a vehicle in which the supply flow rate in a specific non-heating state when heating the vehicle interior is not performed is smaller than the supply flow rate when heating the interior of the vehicle interior and the circulating flow passing through the heating device is not zero. Flow adjustment method in. 2. A heating device of a variable heating capacity which is operated by a driving force of an external driving source and has a non-zero minimum heating capacity, supplies a circulating fluid to said heating device and heats said circulating fluid. A heating device for a vehicle that supplies the circulating fluid to a radiator to heat the interior of the vehicle, wherein a flow rate adjustment that is interposed on a heating fluid path from the heating device to the radiator to adjust a supply flow rate to the radiator. Means, a first adjustment state for providing a supply flow rate in a specific non-heating state when heating the vehicle interior is not performed, and a second adjustment state for providing a supply flow rate when heating the vehicle interior is performed. Switching control means for switching the adjusting means, wherein the supply flow rate corresponding to the first adjustment state is smaller than the supply flow rate corresponding to the second adjustment state, and the circulating flow rate passing through the heating device is reduced. Flow control device in the vehicle heating apparatus that do not. 3. A flow control device for a vehicle heating apparatus according to claim 2, wherein the supply flow rate corresponding to the first adjustment state is a non-zero flow rate. 4. A flow control device according to claim 2, wherein the supply flow rate corresponding to the first adjustment state is zero. 5. The flow control means according to claim 3, wherein said flow control means is provided on a heating fluid passage extending from said heat generating device to a radiator, and said heating means is arranged in parallel with said flow control means. A bypass fluid passage connected to the heating fluid passage, wherein a passage cross-sectional area of the bypass fluid passage is smaller than a non-zero minimum passage cross-sectional area on the heating fluid passage side between the flow rate switching means and the radiator. A flow control device in a vehicle heating device. 6. A flow rate adjusting means according to claim 4, wherein said flow rate changing means is provided on a heating fluid passage from said heat generating device to said radiator, and has a parallel relationship with said flow rate switching means and said radiator. And a bypass fluid passage connected to the heating fluid passage. 7. A flow control device in a vehicle heating system, wherein the bypass fluid passage according to claim 6 is connected upstream of a radiator for cooling a circulating fluid supplied from an external drive source. 8. A flow rate adjusting device in a vehicle heating device, wherein the flow rate switching means according to claim 2 is an electromagnetic on-off valve. 9. The flow rate adjusting means according to claim 2, comprising: a direction switching means interposed on a heating fluid path from the heating device to the radiator; and a bypass fluid path branched and connected to the direction switching means. A flow regulating device for a vehicle heating device, wherein a passage cross-sectional area on a bypass fluid passage side is smaller than a passage cross-sectional area on a heating fluid passage side. 10. The heat generating device according to claim 2, wherein a housing which internally forms a heat generating chamber and a heat radiating chamber adjacent to the heat generating chamber for circulating a circulating fluid, and a bearing device mounted on the housing. A rotating shaft rotatably supported, and a rotor rotatably provided by the rotating shaft in the heating chamber;
A flow control device for a vehicle heating device, which is a viscous heater having a viscous fluid interposed in the heating chamber and having a viscous fluid generated by rotation of the rotor. 11. A viscous heater according to claim 10, further comprising a storage chamber communicating with the heat generating chamber in a central region of the rotor, and when the heat generating capacity is reduced, the viscous fluid in the heat generating chamber is recovered into the storage chamber by at least the Weissenberg effect. A flow control device in a vehicle heating device.