JPH0696367B2 - Car heating system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heating system for an automobile.

(Prior Art) First, with reference to FIG. 6, a conventional automobile heating device will be described.

The water-cooled engine 1 is connected to a radiator 3 for heat radiation via a pump 2 and is also connected to a heating heat exchanger (in-vehicle heat exchanger) 4.

When the engine 1 is driven, the radiator fan 3a is driven and the pump 2 is driven. Cooling water is circulated by the pump 2, and this cooling water is cooled by the radiator 3. On the other hand, the cooling water from the engine 1 is supplied to the heating heat exchanger 4 and radiates heat there.

When heating the inside of the vehicle, the blower 4a is driven to send warm air from the heating heat exchanger 4 into the vehicle.

(Problems to be Solved by the Invention) By the way, in the case of the above-described automobile heating system, the engine 1
Since the cooling water (warm water) from the cooling water is passed through the heating heat exchanger 4 to perform heating, the temperature of the cooling water is low immediately after the engine is started, and even if the blower 4a is driven, cool air is emitted inside the vehicle. There is a problem that it will be sent to.

For example, if the outside air temperature is 0 ° C, it takes 5 to 15 minutes for the engine 1 to warm up, and if the outside air temperature is -20 ° C, it takes 20 to 30 minutes for the engine 1 to warm up. There is a problem that it takes time to do.

An object of the present invention is to provide an automobile heating device that can heat the interior of a vehicle immediately after the engine is started.

(Means for Solving the Problem) According to the present invention, a water-cooled engine, a radiator for cooling the cooling water of the water-cooled engine, and a vehicle interior using the cooling water of the water-cooled engine A heat storage device used for an automobile having a heat exchanger for cooling, the heat storage device being composed of a supercooling heat storage material cooled by the water cooling engine and the heat exchanger, and a switch for starting or heating the water cooling engine. Is turned on to release the supercooled state of the heat storage material to bring the heat storage material into a heat radiation state, and the cooling water is circulated between the heat storage device and the heat exchanger when the heating switch is turned on. And a first circulation means for circulating the cooling water to the radiator for heat radiation when the temperature of the water-cooled engine reaches a preset first preset temperature after the water-cooled engine is started. Second circulation means for circulating the heat storage device and the heat exchanger, and suppressing heat radiation from the radiator for heat radiation until the temperature of the water-cooled engine reaches a second preset temperature higher than the first preset temperature. A heating system for an automobile, comprising: a restraining unit; and a third circulating unit that circulates the cooling water from the water-cooled engine to the heat storage device for a predetermined time when the water-cooled engine is stopped. The device is obtained.

As the heat storage material, for example, a mixture of NaCH ₃ COO · 3H ₃ O and a polysaccharide is used.

When this heat storage material is heated above 60 ° C, it turns into a gel,
Stores latent heat. The latent heat once stored is not released even when the heat storage material is cooled (for example, the gel state is maintained at room temperature). The heat storage material that stores this latent heat can be stored for a long period of time without heat insulation. On the other hand, when an appropriate stimulus is applied, it is activated and returns to a solid state. At this time, heat of 58 ° C is released.

(Operation) In the present invention, while the engine is being driven, the cooling water (hot water) from the engine is passed through the heat storage device to store heat in the heat storage material (that is,
Stored as latent heat). The latent heat stored in this heat storage material is
Even if the heat storage material is cooled, it is not released. That is,
No latent heat is released even when the engine is stopped.
On the other hand, when the releasing means releases the supercooled state of the heat storage material, latent heat is released from the heat storage material. The release of the supercooled state is performed by applying an appropriate stimulus to the heat storage material. Then, for example, when heating the inside of the vehicle immediately after the engine is started, the first circulation means circulates the cooling water warmed by the heat radiation from the heat storage material to the heat exchanger to perform heating. Good.

Further, when the temperature of the water-cooled engine reaches a preset first set temperature, the cooling water is circulated to the radiator for heat dissipation by the second circulation means and is also circulated to the heat storage device and the heat exchanger to heat the inside of the vehicle and store heat. Regenerate material (store heat in heat storage material). At this time, until the engine reaches the preset second set temperature, the suppressing means suppresses heat dissipation from the radiator for heat dissipation and raises the temperature of the cooling water, thereby regenerating the heat storage material in a short time.

On the other hand, when the driving time of the engine is short, heat cannot be sufficiently stored in the heat storage material. Therefore, immediately after the engine is stopped, the cooling water is circulated through the heat storage device by the third circulation means for a predetermined time to store heat in the heat storage material.

(Example) Hereinafter, the present invention will be described with reference to examples.

First, referring to FIG. 1, the water-cooled engine 11 is provided with a cooling water passage A through a first pump 12 for circulating cooling water.
A radiator 13 for heat dissipation (hereinafter simply referred to as a radiator) is connected by. On the other hand, a heating heat exchanger (in-vehicle heat exchanger) 14 is connected to the first pump 12 by a cooling water passage B, and the in-vehicle heat exchanger 14 includes a supercooling heat storage material 15a and a heat insulating material 15b. It is connected to the covered heat storage device 15. The heat storage device 15 is connected to the engine 11 by the cooling water passage B. That is, as shown in the figure, the in-vehicle heat exchanger 14 and the heat storage device 15 are connected in series.

A cooling water passage C is arranged in parallel with the in-vehicle heat exchanger 14 and the heat storage device 15, and the cooling water passage C is connected to the cooling water passage B.
The cooling water passage C is provided with a second pump 16 and a solenoid valve 17, and the cooling water passage B is provided with solenoid valves 18 and 19 at positions where the cooling water passage C can be cut off from the engine 11. Further, the cooling water passage A is provided with electromagnetic valves 20 and 21. A louver 22 for controlling the inflow of air into the radiator 13 and the engine 11 is provided in front of the radiator 13.
Is attached, and the opening degree of this louver 22 is the engine
It is controlled as described later based on the temperature of 11, that is, the cooling water temperature of the engine 11.

By the way, as the heat storage material, for example, NaCH ₃ COO ・ 3
A mixture of H ₂ O and a polysaccharide is used.

When this heat storage material is heated above 60 ° C, it turns into a gel,
Stores latent heat. The latent heat once stored is not released even when the heat storage material is cooled (for example, the gel state is maintained at room temperature).
That is, it becomes a supercooled state). The heat storage material that stores this latent heat can be stored for a long period of time without heat insulation. On the other hand, when an appropriate stimulus is applied, it is activated and returns to a solid state. At this time, heat of 58 ° C is released. As a heat storage material having such supercooling characteristics, for example, those described in JP-A-61-9484, JP-A-61-14283, and JP-A-63-13798 are known. There is.

Next, referring to FIG. 2, the starter motor 33 and the heat storage material 15 are connected in parallel to the automobile battery 31 via the main switch 32.
An electrode device 34 for stimulating a is connected.
A second pump 16 and a solenoid valve 17 are connected in parallel to the battery 31 via a heating switch 35.

Here, with reference to FIG. 1 and FIG. 2, the operation of the above-described vehicle heating device will be described. Here, it is assumed that latent heat has already been stored in the heat storage material 15a.

When the main switch 32 is closed, the starter motor 33 is driven, which starts the engine 11. At this time, discharge is performed from the electrode 34a of the electrode device 34, whereby the supercooled state of the heat storage material 15a is released, and latent heat is released from the heat storage material 15a. The main switch 32 is opened after the engine is started.

Immediately after the engine 11 is started, when heating is performed, the heating switch 35 is closed. As a result, the second pump 16 is driven and the solenoid valve 17 is opened (at this time, the solenoid valves 18 and 19 are closed). As a result, the cooling water circulates through the cooling water passage C, the heat storage device 15, and the in-vehicle heat exchanger 14. At this time, the blower 14a is driven.

The cooling water is warmed by radiating heat from the heat storage material 15a and radiated by the in-vehicle heat exchanger 14. By driving the blower 14a, warm air is sent from the in-vehicle heat exchanger 14 to heat the inside of the vehicle. It is desirable that the blower 14a be driven when the cooling water has risen to a predetermined temperature or after the heat storage material has been stimulated for a predetermined time. Further, after the engine 11 is started, latent heat is released from the heat storage material 15a, but since the second pump 16 is stopped until the heating switch 35 is closed, that is, the cooling water passage C is passed. Since the cooling water is not circulated to the heat storage device 15 and the in-vehicle heat exchanger 14,
No heating.

When the temperature of the engine 11 reaches a predetermined temperature (first set temperature), a thermostat valve (not shown) of the engine cooling water circuit is opened, the solenoid valves 20 and 21 are opened, and the first pump 12 is driven. Cooling water is circulated. At this time, the solenoid valves 18 and 19 are opened, the heating switch 35 is opened, the second pump 16 is stopped, and the solenoid valve 17 is closed.

Therefore, the cooling water heated by the engine 11 is the first pump.
Sent to radiator 13 by 12, where fan 11a
The cooling water from the engine 11 passes through the heat storage device 15 and the in-vehicle heat exchanger 14 to dissipate the heat.
Return to. At this time, in the heat storage device 15, the heat (latent heat) is absorbed from the heated cooling water to the heat storage material 15a, and the heat storage material 15a changes from a solid state to a gel state. That is, the heat storage material 15a absorbs heat from the cooling water.

In this heat absorption, since the cooling water only partially absorbs the temperature of the cooling water, the temperature of the cooling water slightly decreases, but the cooling water at a temperature sufficiently higher than the heat radiation temperature from the heat storage material 15a flows to the in-vehicle heat exchanger 14. , The heat is dissipated here and the inside of the vehicle is heated.

Here, the heat radiation temperature from the heat storage material 15a is 58 ° C, the cooling water temperature when using the heat storage material 15a is 50 to 55 ° C, the thermostat valve opening temperature is 70 to 80 ° C, and the cooling water temperature from the engine 11 is 95 to The temperature was set to 105 ° C.

By the way, before the heat storage of the heat storage material 15a is completed, the engine 11
Is stopped, that is, when the heat storage is insufficient, the heat storage material 15a
Heat is dissipated before the supercooled state.

For example, if the engine 11 is driven until time T as shown in FIG. 3, it is assumed that the engine 11 is stopped at time t when the heat storage in the heat storage material 15a is completed.

In this case, the heat quantity required for heat storage of the heat storage material 15a is the area EABC in FIG. 3, and the heat quantity stored by the time t is the area EAD.
Is. Therefore, when the engine 11 is stopped at the time t, the heat storage material 15 is not supplied to the supercooled state due to insufficient heat storage.
It radiates heat from a.

In order to prevent this heat radiation, that is, to normally store heat in the heat storage material 15a, when the engine 11 is stopped, the solenoid valves 20 and 21
Is closed and the solenoid valve 17 is opened, and only the second pump 16 is driven by the battery for a predetermined time. As a result, the cooling water that has passed through the engine 11 circulates through the heat storage device 15 and the in-vehicle heat exchanger 14. Due to this circulation, the heat storage material 15a absorbs heat from the cooling water (warm water), and as a result, the temperature of the cooling water drops as shown by the broken line in FIG.

Thus, after the engine 11 is stopped, the solenoid valve 20 and
It is possible to effectively absorb heat from the cooling water by closing the valve 21, that is, by preventing the cooling water from circulating in the radiator 13 and driving the pump 16 by the battery. The heat absorption amount is the area EAF, and if the area EABC <the area EAF, there is no problem even if the engine is stopped at the time t. The above-mentioned predetermined time is determined, for example, according to the time required to store heat in the heat storage material 15a.

When the heat storage material 15a is regenerated (heat storage), the engine 1
1 is a preset second engine temperature (second set temperature, this second set temperature is higher than the normal engine temperature, that is, the second set temperature is higher than the first set temperature) Until then, the louver 22 is closed by a controller (not shown). In this way, closing the louver 22 will prevent the inflow of air into the radiator 13. So when the louver 22 is closed,
Since the air flow given to the radiator 13 through the louver 22 is lost, the heat radiation from the radiator 13 becomes extremely small. As a result, cooling of the cooling water by the radiator 13 is hindered, and the cooling water temperature rises rapidly. And this high temperature cooling water is the solenoid valve.
19, heat storage device 15, vehicle interior heat exchanger 14, solenoid valve 18, and first
Since it circulates through the pump 12, the heat storage material 15a can be regenerated in an extremely short time.

When the engine temperature reaches a preset engine temperature, the louver 22 is opened by the control device. As a result, the airflow is given to the radiator 13 through the louver 22, and the radiator 13 is cooled. That is, the heat dissipation efficiency of the radiator 13 is increased. And the radiator
The cooling water is cooled at 13, and the engine 11 is thereby cooled.

In this way, when the engine temperature reaches the preset engine temperature, the louver 22 is controlled to be opened by the control device, and the radiator 13 itself is cooled by the air flow (that is, the heat radiation efficiency of the radiator 13 is increased). As a result, the engine 11 is cooled. That is,
The louver 22 and the control device for controlling the opening and closing of the louver 22 correspond to the suppressing means for suppressing the heat radiation from the radiator 13.

By the way, the power supply circuit shown in FIG. 4 may be used instead of the power supply circuit shown in FIG.

In the power supply circuit shown in FIG. 4, the starter motor 3 is connected in parallel to the vehicle battery 31 via the main switch 32. Also, the battery 31 has a heating switch.
2nd pump 16, solenoid valve 17, and heat storage material 15a through 35
A resistor 36 for stimulating is connected in parallel.

With this power supply circuit, regardless of whether the engine 11 is driven or not, if the heating switch 35 is closed, the heat storage material 15a is stimulated by the resistor 36 and heat is released from the heat storage material 15a. At this time, the second pump 16 is driven and the solenoid valve 17 is opened, so that the heat storage device 15 and the in-vehicle heat exchanger 14 are
The cooling water circulates between and, and the inside of the vehicle is heated by the heat released from the in-vehicle heat exchanger 14.

The control after the engine 11 is started is the same as that of the embodiment described with reference to FIGS. 1 and 2, and the description thereof is omitted.

Next, another embodiment of the present invention will be described with reference to FIG.

In this embodiment, a check valve 23 is provided between the engine 11 and the first pump 12, and between the second pump 16 and the solenoid valve 17 and between the check valve 23 and the engine 11. They are connected by a cooling water passage D. An electromagnetic valve 24 is provided in this cooling water passage D. On the other hand, the cooling water passage A is provided with only the solenoid valve 21. An electric fan 25 is arranged between the engine 11 and the radiator 13, and the electric fan 25 is
When regenerating the heat storage material 15a, it is stopped until the engine temperature reaches a preset temperature (second set temperature).
The rest of the configuration is the same as that of the vehicle heating system shown in FIG.

When heating is performed immediately after the engine 11 is started, the second pump 16 is driven and the solenoid valve 17 is opened. As a result, the cooling water circulates through the cooling water passage C, the heat storage device 15, and the in-vehicle heat exchanger 14 (in this case, the solenoid valves 18, 19, and 2).
4 is closed). As a result, the cooling water is warmed by the heat radiation from the heat storage material 15a, and the vehicle interior heat exchanger 14 heats the vehicle interior.

When the temperature of the engine 11 reaches a predetermined temperature (first set temperature) in the same manner as in the embodiment shown in FIG. 1, the thermostat valve is opened, the electromagnetic valve 21 is opened, and the first pump 12 is driven. To be done. At this time, the solenoid valves 18 and 19 are opened, the second pump 16 is stopped, and the solenoid valve 17 is closed. As a result, the cooling water from the engine 11 is cooled by the radiator 13, and the vehicle interior heat exchanger 14 heats the vehicle interior by the cooling water from the engine 11.

When the heat storage material 15a is regenerated (heat storage), the engine 1
The electric fan 25 is stopped and the louver 22 is closed by a control device (not shown) until 1 reaches a preset second engine temperature (higher than the normal engine temperature). As a result, the engine cooling water temperature rises, and this cooling water flows through the solenoid valve 19, the heat storage device 15, the heat exchanger 14, and the solenoid valve 1.
8 and circulates through the first pump 12 so that the heat storage material 1
It is possible to regenerate 5a in an extremely short time.

On the other hand, when the engine 11 is stopped, the second pump 16 is driven by the battery and the solenoid valve 24 is opened for the predetermined time described above. At this time, the solenoid valve 19 is opened, and the solenoid valves 17, 18, and 21 are closed. Therefore, the cooling water is the engine 11, the solenoid valve 19, the heat storage device 15, the evaporator 14,
It circulates through a second pump 16 and a solenoid valve 24. By this, when the heat absorption of the heat storage material 15a is not completed,
The heat storage material 15a absorbs heat from the cooling water.

By the way, the embodiment shown in FIG. 5 is effective when the volume of the first pump 12 is large and the volume of the second pump 16 is small, while in the case of the embodiment shown in FIG. pump
This is effective when the capacities of 12 and the second pump 16 are equal to each other, or when the capacities of the first pump 12 have no problem in battery power consumption.

Needless to say, the supercooled state of the heat storage material can be released by mechanical stimulation, chemical stimulation, low-temperature stimulation by electronic freezing, or the like.

(Effects of the Invention) As described above, according to the present invention, it is possible to heat the inside of the vehicle even immediately after the engine is started, even when the engine is not warm. Especially in cold regions. Since it takes a long time for the engine to warm up in the winter, it is extremely useful as preliminary heating until the engine warms up.

Further, when the heat storage material is regenerated, the heat release from the radiator is suppressed until the engine temperature reaches the preset second temperature, so that the heat storage material can be regenerated in an extremely short time. .

Further, since the engine cooling water is circulated to the heat storage device for a predetermined time after the engine is stopped, there is an effect that the heat storage material can completely absorb heat.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an automobile heating device according to the present invention, FIG. 2 is a diagram showing an embodiment of a power supply circuit used in the automobile heating device shown in FIG. 1, and FIG. 3 is an engine cooling. FIG. 4 is a diagram showing the relationship between the water temperature and the heat generation temperature of the heat storage material, FIG. 4 is a diagram showing another embodiment of the power supply circuit used in the vehicle heating system shown in FIG. 1, and FIG. 5 is a vehicle heating according to the present invention. FIG. 6 is a diagram showing another embodiment of the device, and FIG. 6 is a diagram showing a conventional automobile heating device. 11 …… Water-cooled engine, 12 …… First pump, 13 …… Radiator, 14 …… Heating heat exchanger (in-vehicle heat exchanger), 15
...... Heat storage device, 16 …… Second pump, 17,18,19,20,21…
…solenoid valve.

Claims (1)

[Claims] 1. A vehicle having a water-cooled engine, a radiator for cooling the cooling water of the water-cooled engine, and a heat exchanger for heating the interior of the vehicle using the cooling water of the water-cooled engine. Used in the water-cooled engine and the heat exchanger is connected to the heat exchanger and configured by a supercooling heat storage material, and the supercooled state of the heat storage material by starting the water-cooled engine or turning on the heating switch. Release means for releasing the heat storage material into a heat radiation state, first circulation means for circulating the cooling water between the heat storage device and the heat exchanger by turning on the heating switch, and the water cooling When the temperature of the water-cooled engine reaches a preset first set temperature after the start of the rotary engine, the cooling water is circulated to the radiator for heat dissipation and to the heat storage device and the heat exchanger. Second circulation means, deterring means for suppressing heat radiation from the radiator for heat radiation until the temperature of the water-cooled engine reaches a second set temperature higher than the first set temperature, and the water-cooled engine is stopped. When
A heating system for an automobile, comprising: a third circulation means for circulating cooling water from the water-cooled engine to the heat storage device for a predetermined time.