JP3934398B2 - Vehicle heating system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heating means capable of rapid heating, particularly in an air conditioning system mainly used for heating a cabin of a vehicle such as a passenger car using a diesel engine or a gasoline engine as a power source in cold regions or extremely cold weather. The present invention relates to a heating device provided.
[0002]
[Prior art]
A viscous heater is known as a heating heat source for a vehicle such as a passenger car used for heating engine cooling water immediately after starting in a cold region or extremely cold, or for heating a cabin (Japanese Patent Laid-Open No. 2-246823, actual (See Kaihei 4-11716, JP-A-9-254637, JP-A-9-66729, JP-A-9-323530, etc.).
[0003]
The viscous heater is a system in which a viscous fluid such as silicone oil generates heat by shearing, heat is exchanged with circulating water circulating in the water jacket, and is used as a heat source for heating. A heat generating chamber is formed inside the housing, and a water jacket is formed outside the heat generating chamber. A drive shaft is rotatably supported on the housing via a bearing device, and the rotor is rotatable on the drive shaft in the heat generating chamber. Is fixed, and a viscous fluid such as silicone oil is sealed in the gap between the wall of the heat generating chamber and the rotor, and circulating water is taken in from the water inlet port in the water jacket and sent out from the water outlet port to the external heating circuit. It is circulated as much as possible.
[0004]
In this viscous heater incorporated in a vehicle heating device, if the drive shaft is driven by the engine, the rotor rotates in the heat generating chamber, so that the viscous fluid is sheared in the gap between the wall of the heat generating chamber and the outer surface of the rotor. The generated heat is exchanged with the circulating water in the water jacket, and the heated circulating water is used for warming up the engine and heating the vehicle such as the cabin in the heating circuit.
[0005]
The above-mentioned viscous heater has a simple structure, so it can be reduced in size and cost. A non-contact mechanism with no wear can ensure high reliability and safety, and the water temperature rises. When the auxiliary heater is not required, the electromagnetic clutch is activated by temperature control and the operation is automatically stopped, so that it has excellent characteristics such as prevention of energy loss. However, the viscosity of silicon oil used as a viscous fluid gradually decreases and the shear resistance decreases as the rotational speed of the rotor increases. Therefore, the temperature due to heat generation of silicon oil is limited to about 240 ° C., which increases the temperature of circulating water. In addition to being limited, it takes time for the silicon oil to be agitated at the time of cold start, so that there is a drawback that a rapid heating effect cannot be obtained in the engine cold time. Therefore, especially in cold district specification vehicles equipped with a diesel engine, such a viscous heater is not sufficient in its effectiveness, and an auxiliary heater capable of heating the heat medium fluid to a high temperature in a short time and efficiently. Was desired.
[0006]
The present inventors have found that by shearing the magnetic path formed between the magnet and the conductor, at least a heat generation that occurs conductor side magnet type heater system for heat exchange with the refrigerant gas, as for heating 1 A heat source that is mounted on a vehicle or connected to the rear downstream side of a heater core of a vehicle air conditioning system (air conditioner) until the circulating water rises after the engine starts and a heating effect is obtained. As a device for use as a device (see Japanese Patent Application No. 11-28547).
[0007]
The above magnet type heater, oppositely arranged magnets and conductors at a slight gap, by relatively rotating the magnet and the conductor, the conductor by cutting the heat generation (magnetic flux that may arise from the conductor The peripheral refrigerant gas is heated by the heat generated by the electric resistance of the eddy current generated in the fan). More specifically, it is provided in the fan casing and is provided with a slight gap between the fan conductor driven by the engine or motor from the outside. separating the magnet support having a permanent magnet or an electromagnet opposing, attached to the non-rotating within the fan casing by fever that may arise from the conductor by rotation of the fan, the refrigerant gas in the fan casing It has a heated structure.
[0008]
The apparatus is characterized in that at least one of the magnet heaters is installed for heating in the cabin of the vehicle, and more specifically, the magnet heater is incorporated as a heat source of the vehicle air conditioning system. Is characterized in that the magnet heater is connected to the downstream downstream side of the heater core of the air-conditioning system, and the heat medium fluid is heated after the engine is started until a sufficient heating effect is obtained. Is.
[0009]
[Problems to be solved by the invention]
According to the previously proposed means, the temperature rises to a higher temperature in a short time compared to the viscous heater that has been widely used as a heat source for rapid heating of vehicles in cold regions and extremely cold temperatures. Is possible and has an excellent effect. However, in order to expect a more sufficient effect, it is necessary to provide a plurality of magnet heaters in the cabin, and there is a demand for means that can increase the temperature more effectively with a simpler structure.
[0010]
The present invention has been made in order to solve such a problem, and can directly exert the performance of a magnet heater by directly heating the refrigerant gas of an evaporator of a vehicle air conditioning system. It is intended to provide a heating device.
[0011]
[Means for Solving the Problems]
In the vehicle heating device according to the present invention, a switching valve is provided at each of the expansion valve outlet and the compressor inlet of the evaporator, and a bypass pipe is connected via the switching valve, and a magnet and a conductor are interposed between the bypass pipes. Are opposed to each other with a slight gap between them, and the magnet and the conductor are rotated relatively to generate heat generated in the conductor (heat generated by the electrical resistance of eddy current generated in the conductor by shearing the magnetic path). In the vehicle air conditioning system having a structure in which a magnet type heater for heating the refrigerant gas inside the evaporator is disposed, the switching valve is opened when the engine cooling water temperature is lowered, and the refrigerant gas inside the evaporator is transferred to the magnet rapidly heated by a formula heater, which engine cooling water is characterized in that no and closing up the switching valve upon reaching a predetermined temperature A.
[0012]
Magnet type heater used in the present invention, by shearing essentially magnetic path formed between the magnet and the conductor, the heat generation that occurs conductor side a method of heat exchange in the refrigerant gas, Specifically, two members, a permanent magnet (ferrite, rare earth, etc.) and a conductor (heating element) such as a material having a large magnetic hysteresis (hereinafter referred to as “hysteresis material”) or an eddy current material, are arranged facing each other with a slight gap therebetween. and, wherein the permanent magnet and the conductor (hysteresis material, Edei current materials, etc.) by shearing the magnetic path by relative rotation, in a manner that heating and cooling medium gas for heating the heat generation that occurs conductor side is there.
[0013]
The present invention intends to directly heat the refrigerant gas generated in the evaporator of the vehicle air-conditioning system using the above-mentioned magnet type heater, thereby reducing the refrigerant gas supplied from the outside or the refrigerant gas in the vehicle cabin. It is possible to raise the temperature in a very short time, and the magnet heater as a heat source has excellent heat resistance.
[0014]
The connection between the magnet heater and the evaporator is made by providing a switching valve at the expansion valve outlet (downstream side) and the compressor inlet (upstream side) of the evaporator, and connecting the bypass pipe via the switching valve. A magnet heater is arranged in the middle.
[0015]
As the rotation drive source of the magnet heater, either a method of driving the rotating shaft of the magnet heater via a pulley and a V belt by starting the engine or a method using a motor dedicated to the magnet heater is selected. obtain. The ON / OFF control means as a heat source of the magnet heater measures the temperature of the engine cooling water or the water in the heater core using a temperature sensor, for example, and when the temperature reaches a predetermined temperature, the electromagnetic clutch or the like is used. Disconnect from the drive source or stop the rotation of the dedicated motor.
[0016]
On the other hand, the switching valve connecting the magnet heater and the evaporator by the bypass pipe is closed, the refrigerant gas circulation path of the evaporator is returned to the normal state, and the role of the magnet heater as the heat source is stopped. .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. However, the present invention is not restricted thereby, and the design can be freely changed within the scope of the gist of the present invention. FIG. 1 is a longitudinal sectional view showing an embodiment of the vehicle heating device according to the present invention during operation, FIG. 2 is a longitudinal sectional view when the vehicle is stopped, and FIG. 3 is a dedicated drive source for the magnet heater according to the present invention. FIG. 4 is a conceptual diagram showing an embodiment of the present invention when replaced with a motor, and FIG. 5 is a reference longitudinal sectional view of a magnet heater used as a heat source of the present invention.
[0018]
First, as shown in FIG. 5, an example of the magnet heater 2 that is a heat source in the present invention is to arrange a magnet and a conductor facing each other with a slight gap, and relatively rotate the magnet and the conductor. by, a method for heating a refrigerant gas may arise from that fever in conductors, and more specifically provided in the fan casing 2-1 is supported via a bearing B to the rotation axis 2-6, from the outside A magnet support 2-5 for supporting a permanent magnet 2-4 facing a conductor 2-3 of a centrifugal fan 2-2 driven by an engine or a motor with a slight gap is provided in the fan casing 2-1. It is mounted on a non-rotating, by fever that may arise from the conductor 2-3 by the rotation of the centrifugal fan 2-2, has a structure in which the refrigerant gas in the fan casing 2-1 is heated. In the figure, 2-3 ′ is a back plate, 2-7 is a pulley, and 2-10 is an electromagnetic clutch.
[0019]
The present invention is characterized in that the magnet heater 2 is connected to the evaporator-1 as shown in FIGS. 1 and 4 and the refrigerant gas generated in the evaporator-1 is directly heated. That is, a switching valve 1-2 provided with the magnet heater 2 and the evaporator-1 on the downstream downstream side of the expansion valve 1-4, and a switching valve 1-3 provided on the upstream upstream side of the compressor 1-6. The refrigerant gas of the evaporator 1 is directly heated by the heat source generated by the operation of the magnet heater 2 by the bypass pipes 2-8 and 2-9, and the temperature of the engine cooling water is lowered and the heater core 3 is heated. When the cold start (FIG. 4) does not function sufficiently, the interior of the cabin of the vehicle can be heated instantaneously. In the figure, 1-5 is a liquid receiver, and 4 is a blower (FIG. 4).
[0020]
The examples illustrated in FIGS. 1, 2 and 5 use an automobile engine as a drive source for the rotating shaft 2-6 via a pulley 2-7 and a V-belt, and FIG. 3 shows a dedicated motor 2-11. Is the drive source.
[0021]
The bypass pipe 2-8 connected to the magnet type heater 2 exhaust port having the above-described configuration is connected via a switching valve 1-2 provided downstream of the expansion valve 1-4 of the evaporator 1 of the vehicle air conditioning system. Similarly, a bypass pipe 2-9 connected to the intake port of the magnet heater 2 is connected via a switching valve 1-3 provided on the upstream side in front of the compressor 1-6, and the rotating shaft 2- of the magnet heater 2 is connected. When the engine 6 is rotated by an engine drive source, the refrigerant gas flowing in from the intake port is directly heated by the magnet heater 2 to rapidly heat the inside of the evaporator, and the damper (D1) 5 as shown in FIG. The outside air flowing into the air conditioning system through -1 becomes clean warm air by opening the damper (D2) 5-2, and the damper (D3) 5-3 and the damper (D4) 5-4. Damper (D5) 5-5 selectively and the vehicle cabin by opening and closing of which is supplied from the foot of the defrosting outlet or seat, instantaneous heating effect is brought about.
[0022]
When a certain amount of time has passed after the engine starts and the engine coolant reaches a predetermined temperature, the operation of the magnet heater is stopped and the switching valves 1-2 and 1-3 are closed, By closing the bypass pipes 2-8 and 2-9 connecting the heater 2 and the evaporator-1, the evaporator-1 is ready for its original role. In addition, although the use in the state which stopped the compressor 1-6 was demonstrated here, the compressor 1-6 is driven, a heat pump is heating-operated, and in addition, you may heat refrigerant gas with a magnet type heater Needless to say.
[0023]
【The invention's effect】
As described above, the vehicular heating device of the present invention connects a magnet heater as a heat source to an evaporator that is originally used for dehumidification and cooling of an air conditioning system, and directly transfers the refrigerant gas inside the evaporator. This is effective when heating the interior of a vehicle cabin or the like rapidly in a cold region or extremely cold. In addition, it is possible to selectively use the rotational energy of the engine as the rotational drive source of the magnet heater, and because it can achieve downsizing and low cost with a simple structure, it is especially a cold district specification vehicle equipped with a diesel engine A great effect can be expected.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of a heating device according to the present invention when it is operated.
FIG. 2 is a longitudinal sectional view showing an embodiment when the heating device according to the present invention is stopped.
FIG. 3 is a longitudinal sectional view illustrating a case where a dedicated motor is used as a rotational drive source of the magnet heater used in the present invention.
FIG. 4 is a schematic conceptual diagram illustrating the air conditioning system of the present invention.
FIG. 5 is a longitudinal sectional view showing an example of a magnet heater used in the present invention.
[Explanation of symbols]
1 Evaporator
1-2 Switching valve 1-3 Switching valve 1-4 Expansion valve 1-5 Liquid receiver 1-6 Compressor 2 Magnet heater 2-1 Fan casing 2-2 Centrifugal fan 2-3 Conductor 2-3 ′ Back plate 2 -4 Permanent magnet 2-5 Magnet support 2-6 Rotating shaft 2-7 Pulley 2-8 Bypass pipe 2-9 Bypass pipe 2-10 Electromagnetic clutch 2-11 Motor 3 Heater core 4 Blower 5-1 Damper (D1)
5-2 Damper (D2)
5-3 Damper (D3)
5-4 Damper (D4)
5-5 Damper (D5)

Claims (1)

A switching valve is provided at each of the evaporator expansion valve outlet and the compressor inlet. A bypass pipe is connected via the switching valve, and a magnet and a conductor are arranged opposite each other with a slight gap between the bypass pipes. By rotating the magnet and the conductor relatively, the refrigerant gas inside the evaporator is heated by the heat generated in the conductor (heat generated by the electric resistance of the eddy current generated in the conductor by shearing the magnetic path). The air conditioning system for a vehicle having a structure in which a magnet type heater is arranged, and when the engine coolant temperature drops, the switching valve is opened and the refrigerant gas inside the evaporator is rapidly heated by the magnet type heater to cool the engine. The vehicle heating device, wherein the switching valve is closed when water reaches a predetermined temperature.

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