JPH048007Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a floor heating system for a vehicle interior that provides a comfortable temperature sensation to a person sitting in a vehicle interior seat of an automobile in winter.

(Prior Art) The body structure of a typical automobile is equipped with a cabin air conditioner, which is configured to selectively blow out air-conditioned air at an appropriate temperature toward the cabin floor. There is.

However, during cold winter months, warm air blown toward the cabin floor hits the feet of the occupants and then rises due to air convection, hitting the upper body of the occupants, especially the head above the face. Because of the flow, the heat retention effect on the feet is inevitably inferior to the heat retention effect on the vicinity of the head, and therefore, it is difficult for the seated person to avoid feeling the discomfort of cold feet.

By the way, in order to compensate for this difference in heat retention effect and eliminate the feeling of cold feet, it is desirable to separately heat the floor of the passenger compartment in addition to the heat retention effect of the air conditioner. Various proposals have been made regarding device technology.

Specifically, in the conventional proposed structure,
As shown in Publication No. 127009, a high-temperature water circulation space is formed on the floor panel surface, and high-temperature engine cooling water is circulated in the circulation space, thereby dissipating heat from the floor panel. This is what I did.

In addition, a structure was developed in which hot water was circulated in a cylindrical hot water tank installed on the outer periphery of the exhaust pipe as a heating source for hot air air conditioners for automobiles.
This is shown in Publication No. 1208.

(Problem to be solved by the invention) However, according to the conventional floor heating system configured as described above, the radiator on the floor panel surface is
As vehicles are repeatedly stepped on by passengers' feet during use, there is a high risk that the high-temperature water circulation passages and the joints of the passages may be locally damaged and cause accidents such as water leaks. Once a water leak occurs, engine cooling water leaks to the outside, reducing the amount of cooling water, resulting in a serious risk of overheating or seizure of the engine.

In addition, in a structure in which a cylindrical hot water tank is provided around the outer periphery of the exhaust pipe and this hot water is used as a heat source, such as the heating source of the conventional hot air air conditioner described above, the volume of the hot water tank is limited to the space around the outer periphery of the exhaust pipe. Not only is it difficult to obtain the amount of hot water required for the floor heating system, but
The problem is that hot water tends to evaporate at high temperatures and is difficult to use as a stable heat source.

Therefore, the present invention aims to provide a floor heating system for a passenger compartment that does not adversely affect the engine even if the component parts are damaged, and that can provide hot water as a stable heat source necessary for floor heating. The purpose is

(Means for Solving the Problems) In order to achieve the purpose, the configuration of the present invention receives engine exhaust heat from the exhaust tube or tailpipe of the exhaust pipe by contact heat transfer, thereby storing it. a hot water tank in which heated water is heated; an auxiliary tank communicating with the hot water tank via a relief passage; a base portion inserted into the hot water in the hot water tank and a tip portion penetrating a wall portion of the hot water tank; A flooring material made of a heat dissipating member that protrudes outside the hot water tank and a flooring material such as a panel material or sheet material, and a hot water circulation passage is laid out within the thickness of the material, and a heat dissipating floor material laid on the floor of the vehicle interior, and hot water that is energized by a circulation pump and circulates between the hot water tank and the circulation passage of the floor material. It's in the floor heating system in the room.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In the structure of the floor heating system of this embodiment, the hot water tank 5E is formed into a hollow cylindrical shape and is directly inserted into the tail pipe 14 (or exhaust tube) of the engine exhaust pipe, thereby dissipating exhaust heat. It is designed to heat water by receiving heat through contact heat transfer. In addition, notation number 14a
indicates a muffler.

The hot water tank 5E accommodates a water solution to be heated, and an outflow port 6 and a return port 7 are provided at high and low points of the side wall of the hot water tank 5E, respectively.

On the other hand, a heat receiving floor material 8 made of pine having a shape that matches the planar shape of the floor panel is laid on the floor of the vehicle interior. The hot water circulation passage 9 is laid out within the thickness of the material.

Therefore, a hot water supply pipe 11 with a circulation pump 10 interposed in the middle is installed between the outlet 6 of the hot water tank 5E and one opening end of the circulation passage 9. A hot water return pipe 12 is installed between the return port 7 and the other open end of the circulation passage 9, so that hot water flows between the hot water in the hot water tank 5E and the circulation passage 9 of the heat dissipation mat 8. It is designed to circulate.

In addition, a heat pipe 23 is attached to the hot water tank 5E as a heat dissipation member for preventing overheating.
The evaporation side of the heat pipe 23 is immersed in hot water, and the condensation side is exposed to the atmosphere.

However, since the heat pipe 23 has a characteristic that heat transfer operates at a predetermined upper limit of the hot water temperature, when the hot water temperature exceeds the upper limit, the heat pipe 23 operates to dissipate heat, causing the hot water to overheat. Acts to suppress vaporization.

Furthermore, an auxiliary tank 2 is connected to the hot water tank 5E via a pressure cap 21 and a relief passage 22.
4 are communicated with each other to circulate the hot water back and forth during expansion and contraction of the hot water, thereby preventing damage to the hot water tank 5E and refilling the hot water tank.

Since the floor heating device of the embodiment is configured as described above, while the automobile engine is rotating, high-temperature exhaust heat is transmitted to the water in the hot water tank 5E to heat the water, and at the same time, the hot water in the tank 5E is heated. The hot water inside is circulated through the circulation passage 9 of the heat dissipation flooring 8 by the suction and discharge operations of the circulation pump 10.

As a result, heat is continuously radiated from the heat dissipating floor material 8 on the floor to keep the feet of the occupants in the vehicle seats warm, but the heat retention effect at this time does not extend to the upper body of the occupant. Therefore, even if floor heating is performed in conjunction with the hot air heat retention effect of the existing air conditioner, the occupant's face and head will not feel overheated, and this will allow the vehicle to enjoy a comfortable temperature sensation throughout the entire body. Driving becomes possible.

Therefore, even if water leaks or becomes clogged in the hot water circulation path mentioned above, it will only reduce the heat retention effect on the floor, and will not affect the engine or other equipment in any way. Normal running can be maintained.

(Function) (Effect of the invention) As described above, according to the floor heating system for a passenger compartment according to the present invention, the hot water in the hot water tank provided on the outer periphery of the exhaust pipe is heated using the exhaust heat of the engine as a heat source. In addition to retaining heat, the hot water is circulated through the circulation path of the heat dissipation flooring installed on the cabin floor, making it possible to locally heat and keep warm the feet of the occupants of the cabin seats. As a result, the seated occupant receives a comfortable temperature sensation throughout the body, providing good drivability, and even if a component of the system is damaged, the engine cooling water is not affected, ensuring safe driving of the vehicle. is maintained, etc.
It has the effect of improving the usability and safety of automobiles.

Further, according to the present invention, the hot water tank is provided with a heat dissipation member and an auxiliary tank is attached via a relief passage, so that evaporation of hot water is prevented and sufficient hot water is ensured for floor heating. This has the effect of providing stable and comfortable floor heating.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a floor heating system for a passenger compartment showing an embodiment of the present invention. 5E...Hot water tank, 8...Radiation floor material, 9...
Circulation passage, 10... Circulation pump, 23... Heat pipe as a heat radiating member, 14... Tail pipe, 24... Auxiliary tank.

Claims (1)

[Claims for Utility Model Registration] A hot water tank in which the water contained therein is heated by receiving engine exhaust heat from the exhaust tube or tail pipe of the exhaust pipe through contact heat transfer; an auxiliary tank communicating with the hot water tank via a relief passage; a heat radiating member having a base inserted into the hot water in the hot water tank and a distal end penetrating a wall of the hot water tank and protruding outside the hot water tank; A flooring material made of flooring material such as panel material or sheet material, with a hot water circulation passage laid out within the thickness of the material, and a heat dissipation flooring material laid on the floor of a passenger compartment. . A floor heating system for an automobile cabin, comprising hot water that is energized by a circulation pump and circulates between the inside of the hot water tank and the circulation passage of the flooring material.