JP2712516B2 - Vehicle heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention relates to a vehicle heating device.

(Prior Art) As a prior art related to the present invention, Japanese Utility Model Application Laid-Open No. 59-121476 is disclosed.
Is described in Japanese Patent Application Publication No.

This prior art, when the cooling water of the engine in the heating and hot water circuit is not sufficiently warmed at the time of a cold start, normal running in a cold region, or the like, as shown in FIG. By performing heat exchange via a heat generator in the above, the cooling water in the heating hot water circuit is warmed to improve the heating capacity.

That is, the heat of the high-temperature exhaust gas passing through the exhaust pipe 81 is absorbed into the heat generator 82 by the heat absorbing portion 82a of the heat generator 82 disposed in the exhaust pipe 81, and the heat is absorbed by the heat generator 82. Heat radiating part 82b
Accordingly, heat is radiated into the heating / hot water circuit 83.

Accordingly, the cooling water passing through the heating / hot water circuit 83 is warmed and flows to the heating device 84.

(Problems to be Solved by the Invention) However, in the above-mentioned prior art, since the thermal conductivity of the gas, that is, the exhaust gas is several tenths of the thermal conductivity of the liquid, that is, the cooling water, the heat generator 82 The effective heat transfer area of the heat absorbing portion 82a has to be increased. However, when the heat absorbing portion 82a of the large heat generator 82 is provided in the exhaust pipe 81, the portion through which the exhaust gas can pass becomes very narrow. Accordingly, there is a risk that the soot in the exhaust gas may cause clogging of the exhaust pipe 81, and that the back pressure of the engine may increase, thereby causing a risk of causing a decrease in engine output or an engine malfunction.

Therefore, the exhaust pipe 81 in the vicinity of the heat absorbing portion 82a of the heat generator 82 needs to be large, which makes it difficult to mount it on a vehicle.

Therefore, in the present invention, an invention of a lightweight and compact heat generator for warming cooling water in a heating and hot water circuit is a first technical problem thereof.

Also, during low load operation of the engine, such as during idling, the water pump driven by the drive shaft of the engine has a small discharge rate. Therefore, the amount of cooling water flowing through the heating hot water circuit is small, and the heating capacity is not sufficient. In order to solve this problem, an electric water pump has conventionally been provided in the middle of the heating and hot water circuit. However, it is disadvantageous in terms of cost, and its use has been rarely performed.

Therefore, in the present invention, the second technical problem is to increase the amount of cooling water flowing through the heating / hot water circuit.

[Configuration of the invention]

(Means for Solving the Problems) A first technical means of the present invention taken to solve the above-mentioned first technical problem of the present invention is a drive shaft of an automobile engine, a drive shaft and clutch means. Shaft, a first housing fixed to the vehicle engine that rotatably supports the shaft, a heating chamber formed inside the first housing, and a heating chamber fixed in the middle of the shaft to the inside of the heating chamber. A labyrinth groove formed in the heat generating chamber and a peripheral edge of the rotor, each of which has a labyrinth groove; The grooves are close to each other,
That is, a heat generator in which a viscous fluid is sealed in a heating chamber is inserted into a heating and hot water circuit of an automobile engine.

Further, the second technical means of the present invention taken to solve the above-mentioned second technical problem of the present invention is, in addition to the above-mentioned first technical means of the present invention, provided at one end of the shaft. Fix the impeller, encase the impeller inside the working fluid passage,
This is to provide a vortex chamber that does not communicate with the heat generating chamber.

(Operation) According to the above-described first technical means of the present invention, since the light and compact heat generator for warming the working fluid in the heating and hot water circuit is installed, it can be easily mounted on a vehicle.

According to the second technical means of the present invention described above,
The flow rate of the working fluid flowing through the heating and hot water circuit can be increased, and it is not necessary to newly provide an electric water pump or the like in the heating and hot water circuit.

(Embodiment) Preferred embodiments embodying the technical means of the present invention will be described below with reference to the accompanying drawings. However, in this embodiment, the first housing is a case, the second housing is a cover, the clutch means is an electromagnetic clutch mechanism, and the working fluid passage is a heat receiving chamber.

FIG. 1 is a schematic view of a vehicle heating apparatus 10 according to a first embodiment of the present invention. FIG. 2 shows a cross-sectional view of the heat generator 22 in FIG.

Cooling water for cooling the water-cooled engine 11 is returned to the flow path 13 and the radiator 14 by the water pump 12.
A thermostat valve 15 is provided in the middle of the flow path 13, and by its operation, when the temperature of the cooling water is low, the bypass flow path is provided.
Cooling water is supplied to the radiator 14 when the temperature of the cooling water is high. The main fan 17 for cooling the radiator 14 receives a rotational force from a drive shaft (not shown) of the water-cooled engine 11 via a belt 18.

Separately from the cooling water flow path 13, a flow path 19 of the heating device hot water circuit is provided from the water-cooled engine 11 to the water pump 12. In the middle of this flow path 19, the heater valve 2
0, a water temperature sensor 21, a heat generator 22, and a heater radiator 39 are respectively provided. Sub-fan 40 for heater radiator 39
Are arranged. Further, the control unit 37 receives signals from the heater valve 20 and the water temperature sensor 21 and controls the operation of the heat exchanger 22. At this time, the cooling water acts as warm water for radiating the heater, and will be referred to as warm water hereinafter.

The configuration of the heat generator 22 is as follows. Body 23
Is fixed to the water-cooled engine 11, has an electromagnetic coil 24 fixed thereto, and rotatably supports the right side of the shaft 25 in the figure via an output disk 28 fixed to the shaft 25. . The input pulley 26 is rotatably supported by the shaft 25 and has a plate 27 fixed thereto. The above-described electromagnetic coil 24, plate 27 and output disk 28 provide an electromagnetic clutch mechanism 29.
Is formed.

The case 31 and the cover 32 are integrally fixed by bolts 41 and fixed to the water-cooled engine 11. The case 31 and the cover 32 have partitions 31a and 32a respectively inside,
A heat receiving chamber 33 and a heat generating chamber 34 are formed. Labyrinth grooves 31b and 32b are formed in the inner peripheral portions of the partitions 31a and 32a, respectively. The left side of the shaft 25 in the figure is rotatably supported by the case 31. A rotor 30 is fixed in the middle of the shaft 25, and labyrinth grooves 30a are formed on both sides of the peripheral portion of the rotor 30. The labyrinth grooves 31b, 32b of the partition walls 31a, 32a and the labyrinth groove 30a of the rotor 30 are engaged while maintaining a slight gap, and form a labyrinth groove portion.

A hot water inlet 35 and a hot water outlet 36 are formed in the case 31 and the cover 32 so as to face the peripheral portion. Further, a viscous fluid (for example, silicone oil) is sealed inside the heat generating chamber.

A swirl chamber 43 is formed in a part of the heat receiving chamber 34 by the cover 32 and the sub cover 42. An impeller 44 fixed to one end of the shaft 25 is housed inside the vortex chamber 43.
Is formed with a vane portion 44a. A mechanical seal 45 is provided between the shaft 25, the impeller 44 and the partition 32a, and an oil seal 46 is provided on the side of the heat generating chamber 34 between the shaft 25 and the partition 32a. And swirl chamber 43
Not in communication with

In the above configuration, the heating device 10 is operated by the driver.
When the switch is turned on, the heater valve 20 opens and the hot water flows through the flow path 19 of the heating device hot water circuit. This hot water passes through a temperature sensor 21, a heat generator 22, and a heater radiator 39,
It flows to the water pump 12. Hot water heater radiator 39
When the air flows through the sub-fan 40, heat is released to the outside air by the sub fan 40, and the outside air is introduced into the vehicle interior to warm the vehicle interior.

Now, when the temperature of the hot water is low and the effect of the heating device is poor, if the heater valve 20 is opened and the water temperature detected by the water temperature sensor 21 is equal to or lower than a set value, the electromagnetic clutch inside the heat generator 22 is controlled by the control unit 37. The mechanism 29 is turned on. Therefore, belt 18
Of the water-cooled engine transmitted to the input pulley 26 through the
The torque of the drive shaft (not shown) is transmitted to the shaft 25 via the plate 27 and the output disk 28.

Accordingly, a rotor 30 fixed to the left end of the shaft 25 in the figure is provided.
Rotates, the shearing force proportional to the rotation speed of the rotor 30 is applied to the viscous fluid in the labyrinth groove portion 38 of the viscous fluid sealed in the heat generating chamber 34. The labyrinth groove
The viscous fluid in 38 generates heat due to increased internal energy and friction. The heat generated in the heating chamber 34 is
And the heat receiving chamber 33 through the respective partition walls 31a and 32a of the cover 32.
To the flowing cooling water. At the same time, the hot water circulating through the heating hot water circuit 19 by the water pump 12 is further promoted by the pump effect due to the pump effect by the rotation of the rotor portion 44a of the impeller 44 disposed at one end of the shaft 25,
It passes through the vortex chamber 43 and flows out of the warm water outlet 36.

Accordingly, the heat receiving chamber given the heat generated in the heat generating chamber 34
Since the temperature of the hot water flowing through the heater 33 rises and flows to the heater radiator 39, more heat is released to the outside air, so that the heating capacity is improved.

However, if the temperature of the hot water flowing through the flow path 19 of the heating / hot water circuit becomes equal to or higher than the set value, the electromagnetic clutch mechanism 29 is turned off by the operation of the control unit 37, and the driving torque of the water-cooled engine 11 is not transmitted to the shaft 25. Since the rotor 30 does not rotate, no heat is generated and no extra engine driving force is consumed.

If the heat generator 22 is operated in a state where the heater valve 20 is closed, the hot water retained in the heat receiving chamber 33 immediately boils due to its heat generation capability, and the gas is released. Since the water flows into the water pump 12, the performance of the water pump 12 may be impaired. Therefore, the controller 37 not only monitors the temperature of the hot water in the flow path 19 of the heating / hot water circuit, but also monitors the open / closed state of the heater valve 20.

The heat generating capacity of the heat generator 22 can be arbitrarily set in advance by the viscosity coefficient of the viscous fluid sealed in the heat generating chamber 34. That is, the higher the viscosity coefficient, the higher the shearing force generated in the labyrinth groove portion 38 and thus the higher the heat generation capacity, but the greater the consumption of the engine driving force. On the other hand, a viscous fluid having a higher viscosity coefficient has a lower shearing force generated in the labyrinth groove portion 38, and thus has a lower heat generation capability, but consumes less engine driving force.

Although the present invention employs an electromagnetic clutch mechanism as the clutch means, it is needless to say that any means having a clutch mechanism such as a multi-plate hydraulic clutch, a pneumatic clutch, a viscous fluid clutch, or a dry clutch may be used.

FIG. 3 is a schematic view of a vehicle heating device 60 according to a second embodiment of the present invention.

In the first embodiment, the present invention is applied to a water-cooled engine. In the second embodiment, the present invention is applied to an air-cooled engine.

The difference between the first embodiment and the second embodiment is only the engine and the heating and hot water circuit. Therefore, the description of the other parts will be omitted by attaching the same reference numerals to those in the first embodiment.

Further, the water pump 12, the cooling water passage 13, the radiator 14, the thermostat valve 15, and the bypass passage 16 in the first embodiment are not provided.

In the air-cooled engine 61, there is no engine cooling water,
An appropriate working fluid (for example, the same as the engine cooling water) is sealed in the heating / hot water circuit 62. Since the main switch (not shown) of the heating device 60 directly turns on / off the electromagnetic clutch mechanism 29, the heater valve 20
The temperature sensor 21 is not particularly provided.

Other functions and effects are the same as those of the first embodiment, and thus description thereof is omitted here.

〔The invention's effect〕

According to the present invention, since the heat exchange for warming the hot water in the heating hot water circuit is of a liquid-to-liquid type, its heat conductivity is high, and it is extremely lightweight and compact as compared with the conventional one, so that it can be easily mounted on a vehicle. . In addition, since it is not necessary to connect the exhaust pipe and the hot water circuit of the heating device with a heat generator as in the conventional case, that is, only disposing the heat generator in the hot water circuit of the heating device, cost is also reduced. This is advantageous and can be easily mounted on a vehicle.

In addition, the exhaust temperature is low when the vehicle is traveling under low load, and the heat transfer capability is low in the heat generator using the exhaust gas.However, in the present invention, the heat generator operates when the engine is rotating, and the heat is quickly generated. The heating effect can be increased.

Further, since the heat generating ability of the heat generator can be changed in any way by changing the viscosity coefficient of the viscous fluid sealed in the heat generating chamber, it is possible to mount the device of the present invention regardless of the size of the automobile. .

Furthermore, the circulation of the hot water in the heating hot water circuit is promoted by the pump effect due to the rotation of the impeller fixed to the tip of the shaft of the heat generator in the vortex chamber. Therefore, even during low load operation such as idling, the amount of hot water flowing through the heating hot water circuit is large, and the heating capacity is sufficiently ensured. Therefore, there is no need to dispose an electric water pump in the middle of the heating / hot water circuit, which is advantageous in terms of cost.

In addition, even for an air-cooled engine or the like that does not have cooling water, a heating and hot water circuit can be configured by the pump effect of the rotation of the impeller fixed to the tip of the shaft of the heat generator in the vortex chamber. This eliminates the necessity of adopting a high-risk exhaust gas heating device conventionally used as a heating device for a vehicle equipped with an air-cooled engine or a combustion heating device requiring extra fuel.

As described above, the present invention has an extremely high effect as a vehicle heating device.

[Brief description of the drawings]

FIG. 1 is a schematic view of a vehicle heating device according to an embodiment of the present invention. FIG. 2 shows a cross-sectional view of the heat generator in FIG. FIG. 3 is a schematic view of a vehicle heating apparatus according to a second embodiment of the present invention. FIG. 4 is a schematic view of a conventional vehicle heating device. 19 ... heating and hot water circuit, 22 ... heat generator, 25 ... shaft, 29 ... electromagnetic clutch mechanism, 30a, 31b, 32b ... labyrinth groove, 30 ... rotor, 31 ... case, 32 ... cover , 33 ... heat receiving room, 34 ... heat generating room.

Claims (5)

(57) [Claims] A drive shaft for an automobile engine, a shaft connected to the drive shaft via clutch means, a first housing rotatably supporting the shaft and fixed to the automobile engine; A heat generating chamber formed inside one housing, a rotor fixed in the middle of the shaft and disposed in the heat generating chamber, and a working fluid passage surrounding the first housing and forming a working fluid passage not communicating with the heat generating chamber. A labyrinth groove is formed in each of the heating chamber interior and the rotor peripheral edge, and each of the labyrinth grooves is close to each other, and a heat generator in which a viscous fluid is sealed in the heating chamber interior is provided. A vehicle heating device inserted into the heating and hot water circuit of an automobile engine. 2. An impeller is fixed to one end of the shaft,
The vehicular heating apparatus according to claim 1, further comprising a vortex chamber surrounding the impeller inside the working fluid passage and not communicating with the heat generation chamber. 3. When the temperature of the working fluid in the hot water circuit is lower than a set value while the hot water circuit is open, the clutch means is turned on to connect the drive shaft and the shaft. The vehicle heating device according to claim 2, wherein the heat generator is operated by being connected. 4. When the temperature of the working fluid in the hot water circuit is equal to or higher than a set value while the hot water circuit is open, the clutch means is turned off to disconnect the drive shaft and the shaft. The vehicle heating device according to claim 3, wherein the heating device is opened and the heat generator is not operated. 5. When the hot water circuit is closed, the clutch means is not turned on, the drive shaft and the shaft are opened, and the heat generator is not operated. (2) The vehicle heating device according to (2).