JPH06255345A - Heating device for automobile - Google Patents

Abstract

PURPOSE:To provide a heating device for an automobile which can efficiently carry out heat accumulation. CONSTITUTION:A heating device for an automobile is equipped with a feeding circuit 11 which supplies the cooling water which passes through a heat exchanger A for hot water heating, heat accumulator B, and an engine 1 to a heat exchanger A for warm water warming or the heat accumulator B through a selector valve 12, discharge circuit 15 which discharges the cooling water which passes through the heat exchanger A for warm warming or the heat accumulator B through a selector valve 16, air blow fan 17 for warming, and an air blow circuit which allows the blown air by the blowing fan 17 to pass through the heat exchanger A for hot water heating and sends the warm air into the interior of a car.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a heating system for an automobile.

[0002]

2. Description of the Related Art Generally, a heating system for an automobile guides cooling water warmed by an engine to a heat exchanger for hot water heating, and blows air into the passenger compartment as warm air by warming the air passing through the heat exchanger by a blower fan. Is to do.

For this reason, there is a problem that the cooling water passing through the engine does not warm up immediately when the engine is started in the cold season and hot air cannot be produced by the heat exchanger until the water temperature rises.

Therefore, there is an example in which a heat accumulator utilizing the latent heat of an inorganic material is incorporated into a normal automobile heating device.
In this example, the cooling water warmed via the engine is sent to a heat storage device by an electric pump provided especially for storing the heat, and is also sent to a heat exchanger in the vehicle and returned to the engine.

Heat is stored during operation of the engine with a large amount of heat generation, and after that, an electric pump operates at the time of starting and cold cooling water is warmed through the heat accumulator and flows into the heat exchanger, so that warm air can be obtained early.

[0006]

[Problems to be Solved] However, since there is no valve for controlling the inflow and outflow of the cooling water to and from the heat accumulator, there is a risk that the amount of stored heat may flow out in a heat retaining state after completion of the heat storage, and there is a problem in maintaining the heat storage.

The present invention has been made in view of the above points, and an object of the present invention is to provide a heating device having excellent heat storage efficiency.

[0008]

In order to achieve the above object, the present invention provides a heat exchanger A for hot water heating, a heat accumulator B, and cooling water passing through an engine through a switching valve. A feeding circuit that feeds the heat exchanger A for hot water heating or the heat accumulator B, and a discharge circuit that discharges the cooling water passing through the heat exchanger A for hot water heating A or the heat accumulator B to the engine through a switching valve. A heating device for an automobile is provided with a circuit, a ventilation fan for heating, and a ventilation circuit for sending warm air through the heat exchanger A for hot water heating by allowing the air blown by the ventilation fan to pass through the heat exchanger A for hot water heating.

If the cooling water warmed by the engine is made to flow through the heat storage device B by the switching valve to store the heat in the heat storage device B and the switching valve is switched to close the inflow / outflow port, the stored heat amount can be prevented from flowing out. The heat storage efficiency can be improved. The warm-up can be accelerated by transmitting the heat accumulated in the heat accumulator B to the cooling water and discharging it to the engine.

A second aspect of the present invention is a heat exchanger for hot water heating A, a heat accumulator B, and a feeding circuit for feeding cooling water passing through an engine to the heat accumulator B through an on-off valve. A forwarding circuit that forwards the cooling water that has passed through the heat storage device B to the hot water heating heat exchanger A via an opening / closing valve, and a delivery circuit that drains the cooling water that has passed through the hot water heating heat exchanger A to the engine. A heating device for an automobile is provided with a circuit, a ventilation fan for heating, and a ventilation circuit for sending warm air through the heat exchanger A for hot water heating by allowing the air blown by the ventilation fan to pass through the heat exchanger A for hot water heating.

Heat can be stored in the heat accumulator B by feeding the cooling water warmed by the engine by opening the two open / close valves, and by closing both open / close valves, the stored heat quantity can be prevented from flowing out.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIGS. 1 to 4 will be described below. FIG. 1 is a circuit diagram showing a circuit and an engine cooling circuit of the vehicle heating system of this embodiment.

A radiator 3 is arranged in front of the engine 1 with a cooling fan 2 interposed therebetween, and cooling water circulates between a cylinder block 1a, a cylinder head 1b of the engine 1 and the radiator 3 by driving a water pump 4. A cooling water circuit is constructed.

The cooling water circuit controls the circulation of the cooling water by the operation of the thermostat 5 for detecting the engine water temperature. When the engine is not warmed up when the engine is started, the cooling water is not circulated and the temperature exceeds a certain temperature. When this happens, circulate cooling water to cool the engine.

Separately from this circuit, a feed pipe 11 extends from the cylinder head 1b via an opening / closing electromagnetic valve 10 and branches via a midway switching electromagnetic valve 12, one of the feed pipes 11a for normal hot water heating. Connected to the heat exchanger A, the other feed pipe 11b
Is connected to the heat storage device B, and the switching electromagnetic valve 12 is operated to selectively supply the cooling water to either the heat exchanger A for hot water heating or the heat storage device B.

Discharge pipe extending from the heat exchanger A for hot water heating
15a and a discharge pipe 15b extending from the heat storage unit B are gathered in a switching electromagnetic valve 16 and connected to the engine 1 as a single discharge pipe 15. The switching electromagnetic valve 16 operates to heat-heat the heat exchanger for hot water heating. Cooling water from either A or the heat accumulator B is supplied to the engine 1
To deliver.

Therefore, by controlling the switching of the switching electromagnetic valves 12 and 16, the cooling water can be selectively supplied to and discharged from either the heat exchanger A for hot water heating or the heat accumulator B.

On the other hand, air can be blown by the fan 17 to the hot water heating heat exchanger A, and the hot air warmed by the hot water heating heat exchanger A is sent into the passenger compartment.

The heat accumulator B has a structure as shown in FIGS. 2 and 3.

That is, a large number of fins 21 are arranged in parallel in the heat storage agent container 20 having a rectangular box shape.
A cooling water tube 22 penetrating from one side wall is bent and meandered about three times while penetrating the large number of fins 21 and again extends through the same side wall. The inside of the heat storage agent container 20 is sealed
It is filled with a heat storage agent such as CaCl ₂ solution.

A heat insulating case 23 is provided around the heat storage agent container 20.
Is covered. The heat insulating case 23 is a case in which a heat insulating material 23b is sandwiched between an inner wall 23a and an outer wall 23c.
Insulate and keep warm.

The heat accumulator B has the above structure,
When the cooling water warmed from the engine 1 is fed to the heat storage device B via the feeding pipe 11b, the cooling water flows in the cooling water tube 22 and the cooling water tube inside the heat storage agent container 20 therebetween.
The latent heat type heat storage can be performed by transferring heat to the heat storage agent filled around 22.

By closing the one of the switching electromagnetic valves 12 and 16 which communicates with the heat storage device B side, the outflow of the heat storage amount can be avoided.

The heating apparatus according to this embodiment has the above-mentioned structure, and an operation diagram of each part according to various operation modes will be described below with reference to FIG.

During operation stop, the opening / closing solenoid valve 10 is closed,
The switching electromagnetic valves 12 and 16 open the hot water heating heat exchanger A side, and the fan 17 is not driven. That is, the inflow / outflow passage of the cooling water on the side of the heat storage unit B is blocked to ensure the heat insulation.

When performing rapid heating, first the opening / closing electromagnetic valve 10 is opened and the electromagnetic valves 12, 16 are switched to open the side of the heat storage device B, the cooling water is warmed by the heat storage device B and returned to the engine 1 for warming up. As soon as the cooling water temperature reaches the set temperature, the switching electromagnetic valves 12 and 16 are switched to open the hot water heating heat exchanger A side, and the warmed cooling water is passed through the hot water heating heat exchanger A, and at the same time. Drives fan 17.

The engine 1 is warmed up early by the heat stored in the heat storage unit B to raise the temperature of the cooling water, and the hot water heating heat exchanger A produces warm air based on the cooling water to heat the engine.

This is the state during normal heating, and when the engine is already warm, the cooling water does not flow through the heat storage unit B once, but the normal heating is directly entered. The heat storage state of the heat storage device B is maintained during normal heating.

When heat storage is started when the engine is operating and the heating value is large and the heating is not being performed, the opening / closing solenoid valve 10 is opened and the switching solenoid valves 12, 16 are switched to open the heat storage unit B side. , The fan 17 stops driving. Hot water from the engine 1 flows to the heat storage device B to transfer heat to the heat storage agent, and latent heat storage is performed.

When the heat storage is completed, the open / close electromagnetic valve 10 is closed, and the switching electromagnetic valves 12 and 16 are switched to close the heat storage device B side. In the heat storage device B, the flow path of the cooling water is cut off, so that the amount of stored heat is less likely to flow out and the heat storage efficiency can be improved.

Open / close solenoid valve when heating is not required
10. The switching solenoid valves 12 and 16 are set so that the heat storage device B side is closed.

Next, during the warm-up operation, the opening / closing electromagnetic valve 10 is opened and the switching electromagnetic valves 12 and 16 are switched to the side in which the heat storage device B side is opened as described above, so that the heat stored in the heat storage device B is released. The cooling water that has been transmitted to and flows out of the cooling water and is warmed is discharged to the engine 1 to accelerate warming up.

As described above, by controlling the valve according to the operation mode and changing the circuit setting, the regenerator B is effectively used, quick heating and warming are accelerated, and early operation is possible to realize comfortable operation. At the same time, the heat accumulator B is in the heat retaining state except when heat is dissipated and the heat is accumulated in the heat accumulator B, and the efficiency of heat accumulation can be improved.

Another embodiment will be described with reference to FIGS. 5 and 6.

The vehicle heating system of this embodiment is different from the cooling water engine 1 of the above-described embodiment in that the circuit for circulating the heat exchanger A for hot water heating and the heat storage unit B is changed. , The hot water heating heat exchanger A and the heat storage device B themselves are the same, and the same members have the same reference numerals.

A feed pipe 51 extending from the cylinder head 1b of the engine 1 via an opening / closing electromagnetic valve 50 is further connected to a heat storage device B via an opening / closing electromagnetic valve 52. A return pipe 54 extends through the valve 53 and is connected to the hot water heating heat exchanger A, and a discharge pipe 55 extends from the hot water heating heat exchanger A and is connected to the engine 1.

That is, the heat storage device B and the heat exchanger A for hot water heating
Are connected in series by a feed pipe 51, a feed pipe 54, and a discharge pipe 55. The blower circuit is also the same as in the above embodiment.

FIG. 6 shows an operation diagram of each part according to various operation modes, and the operation will be described based on the diagram. When the operation is stopped, the open / close electromagnetic valves 50, 52, 53 are all closed, and the heat accumulator B is adiabatically kept warm with no heat flow.

When performing rapid heating, first open and close the electromagnetic valve.
The cooling water is warmed by the heat storage device B which is in a heat storage state by opening all of 50, 52, 53 and sent to the heat exchanger A for hot water heating, and the fan 17
Driven by, hot air can be produced by the heat exchanger A for hot water heating and sent into the passenger compartment for heating.

At the same time, the cooling water warmed in the heat accumulator B reaches the engine 1 to accelerate warming up, and if the cooling water from the engine 1 reaches a certain temperature or higher, the heat exchange for hot water heating does not depend on the heat radiation of the heat accumulator B. Hot water can be sent to the container A and the normal heating state is achieved.

When the heat storage of the heat storage device B is started, the driving of the fan 17 is stopped with the opening / closing solenoid valves 50, 52, 53 open, and the hot water from the engine 1 flows to the heat storage device B to heat the heat storage agent. Is transmitted and heat is stored.

When the heat storage is completed, the opening / closing solenoid valves 50, 5
2, 53 are closed and the inflow / outflow port of the heat storage device B is closed to maintain heat storage. The same applies when heating is not used.

Next, during the warm-up operation, the opening / closing solenoid valves 50, 5
2, 53 are opened, the heat stored in the regenerator B is transferred to the cooling water while the fan 17 is stopped, and the warmed-up cooling water is discharged to the engine 1 to accelerate the warm-up. .

[0044]

According to the present invention, the heat storage efficiency of the heat storage device B can be improved by closing the inflow / outflow valve of the heat storage device B.

Also, the valve control can operate the regenerator B in response to various operating states. By warming the cooling water in the regenerator B and discharging it to the engine, warming up can be accelerated and early operation can be performed. .

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a circuit and an engine cooling circuit of a vehicle heating system according to an embodiment of the present invention.

FIG. 2 is a front view of a partial cross section of the heat storage unit.

FIG. 3 is a side view with a partial cross section.

FIG. 4 is a diagram showing an operation diagram of each part for various operation modes.

FIG. 5 is a circuit diagram showing a circuit of an automobile heating device and an engine cooling circuit of another embodiment.

FIG. 6 is a diagram showing an operation diagram of each part for various operation modes in the same example.

[Explanation of symbols]

A ... Heat exchanger for hot water heating, B ... Heat storage device, 1 ... Engine,
2 ... Cooling fan, 3 ... Radiator, 4 ... Water pump, 5 ... Thermostat, 10 ... Open / close solenoid valve, 11 ... Feed pipe, 12 ... Switching solenoid valve, 15 ... Discharge pipe, 16 ... Switching solenoid valve, 17 ... Fan, 20 ... Heat storage agent container, 21 ... Fin, 22
… Cooling water tube, 23… Insulation case, 50… Open / close solenoid valve, 51… Feed pipe, 52,53… Open and close solenoid valve, 54… Reroute pipe, 55… Discharge pipe.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasushi Yoshino 31-2 Sakuraoka-cho, Shibuya-ku, Tokyo Toyo Radiator Co., Ltd.

Claims (2)

[Claims] 1. A hot water heating heat exchanger A, a heat accumulator B, and a feeding circuit for feeding cooling water that has passed through an engine to the hot water heating heat exchanger A or the heat accumulator B through a switching valve. And a discharge circuit for discharging the cooling water that has passed through the hot water heating heat exchanger A or the heat storage device B to the engine through a switching valve, a heating fan, and a fan that blows the hot water to the hot water. Heat exchanger A for heating
A heating system for an automobile, comprising: a blower circuit for sending warm air into the passenger compartment. 2. A heat exchanger A for hot water heating, a heat accumulator B, a feeding circuit for feeding cooling water passing through an engine to the heat accumulator B through an opening / closing valve, and a heat accumulator B. A forwarding circuit for forwarding the cooling water to the heat exchanger A for hot water heating via the on-off valve, a discharge circuit for discharging the cooling water via the heat exchanger A for hot water heating to the engine, and a heating circuit for heating A blower fan and the blower fan blows the heat to the hot water heating heat exchanger A.
A heating system for an automobile, comprising: a blower circuit for sending warm air into the passenger compartment.