JP2005193710A - Vehicular heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular heater improving startup performance of an engine, saving power, and making an installing space of pipes small. <P>SOLUTION: A vehicular heater 1A comprises the engine 3 heating a circulation liquid, a front seat side warm water heater 5 and a rear seat side warm water heater 8 carrying out heat-exchange between the circulation liquid and air; first and second supply pipes 6, 10 connecting an outlet side of the engine 3 and an inlet side of the warm heaters 5, 8; and first and second return pipes 7, 11 connecting an outlet side of the warm heaters 5, 8 and an inlet side of the engine 3. A two-hole pipe 14 is used at a position that is a common path of the second supply pipe 10 and the second return pipe 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle heating device that heats a vehicle interior, for example.

  As a conventional vehicle heating device, there is one disclosed in Patent Document 1.

  As shown in FIG. 4, the vehicle heating apparatus 100 includes a radiator 101, an engine 102, and a radiator circulation pipe 103 that connects the radiator 101 and the engine 102, and circulates the circulating fluid between the radiator 101 and the engine 102. An engine cooling system for cooling the engine 102, a supply pipe 105 and a return pipe 106 connecting the engine 102 and the hot water heater 104, and circulating fluid between the engine 102 and the hot water heater 104. And a heater heating system for heating the hot water heater 104.

The radiator 101 performs heat exchange between the circulating fluid and air, and cools the engine 102 by the circulating fluid cooled by the radiator 101 so that the engine 102 is not heated above a predetermined temperature. In addition, the circulating fluid heated by the cooling of the engine 102 is circulated to the hot water heater 104, and the hot water heater 104 exchanges heat between the warm circulating fluid and air to produce warm air. That is, the circulating fluid used for cooling the engine 102 is used for heating the passenger compartment.
Japanese Patent Laying-Open No. 2003-25826 (FIG. 4)

  However, in the conventional vehicle heating apparatus 100, the supply pipe 105 and the return pipe 106 between the engine 102 and the hot water heater 104 are generally routed through separate routing paths. Therefore, in the process in which the circulating fluid flows from the engine 102 to the hot water heater 104 via the supply pipe 105, the warm circulating fluid is deprived of heat by the outside air and the temperature is lowered. If the circulating fluid is radiated at a place other than the hot water heater 104 in this way, the engine 102 is idled up for a long time, so that the startup performance of the engine 102 is reduced and the power saving of the engine 102 can be reduced. Absent.

  Further, if the supply pipe 105 and the return pipe 106 are separate routing paths, a pipe installation space between the engine 102 and the hot water heater 104 becomes large.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle heating device that can improve engine start-up performance and save power, and can reduce the installation space for piping.

  The invention according to claim 1, which achieves the above object, comprises a heating unit that heats the circulating fluid, a heat exchange unit that exchanges heat between the circulating fluid and air, and a connection between the heating unit and the heat exchange unit, The vehicle heating device includes a supply pipe and a return pipe for circulating the gas, and the supply pipe and the return pipe are arranged so as to be capable of exchanging heat.

  Invention of Claim 2 is the heating apparatus for vehicles of Claim 1, Comprising: The said supply piping and the said return piping are two-hole piping in which two holes were formed in parallel with the partition wall as a boundary, This hole is assigned to the flow path of the supply pipe, and the other hole is assigned to the flow path of the return pipe.

  A third aspect of the present invention is the vehicle heating apparatus according to the first aspect, wherein the supply pipe and the return pipe are formed with an inner peripheral center hole and an outer peripheral ring hole with a cylindrical partition wall as a boundary. The center hole of the double pipe is assigned to the flow path of the supply pipe, and the ring hole is assigned to the flow path of the return pipe.

  Invention of Claim 4 is the heating apparatus for vehicles of Claims 1-3, Comprising: The said heat exchange part has two sets connected in parallel with the said heating part, These two sets of In the heat exchange part, the supply pipe and the return pipe of the heat exchange part arranged farther than the heating part are heat exchangeable pipes.

  A fifth aspect of the present invention is the vehicle heating apparatus according to the first to fourth aspects of the present invention, wherein the place where the supply pipe and the return pipe are heat-exchangeable is arranged under the floor of the vehicle. Features.

  According to the first aspect of the present invention, since the circulating fluid in the supply pipe exchanges heat with the circulating fluid in the return pipe, the temperature of the circulating fluid is reduced as compared with the case where the circulating fluid in the supply pipe exchanges heat with the outside air. Can be kept small. Therefore, the engine start-up performance is improved and the power is saved.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, in the two-hole pipe, the circulating fluid on the supply side contacts the circulating fluid on the return side via the partition wall, and the circulating fluid on the supply side Since heat is exchanged with the circulating fluid on the return side having a temperature higher than that of the outside air, it is possible to effectively prevent the temperature of the circulating fluid from decreasing during the circulation process of the two-hole piping. Therefore, the engine start-up performance is improved and the power is saved. Further, the installation space for the second supply pipe and the second return pipe can be reduced.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1, in the double pipe, the circulating fluid on the supply side contacts the circulating fluid on the return side via the cylindrical partition wall, and the circulating fluid on the supply side Since heat is exchanged only with the circulating fluid on the return side whose temperature is higher than that of the outside air, it is possible to more effectively prevent the temperature of the circulating fluid from decreasing during the circulation process of the double pipe. Therefore, the engine start-up performance is further improved and the power is saved. Further, the installation space for the second supply pipe and the second return pipe can be reduced.

  According to the invention of claim 4, in addition to the effects of the inventions of claims 1 to 3, the far side heat exchange section is inferior in heating performance to the near side heat exchange section, but the heating performance is reduced. Can be suppressed as much as possible. In particular, when the flow rate of the circulating fluid is small, it is possible to prevent an extreme deterioration in the heating performance of the far-side heat exchange unit.

  According to the invention of claim 5, in addition to the effects of the inventions of claims 1 to 4, a place where heat can be exchanged between the supply pipe and the return pipe is arranged under the floor of the vehicle outside the vehicle, so that a cover or the like is provided. Therefore, it is not necessary to prevent contact with the occupant, and since it is not easily affected by outside air, it is not necessary to provide a heat insulating material covering the outer periphery of the supply pipe and the return pipe.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1A and 1B show a first embodiment of the present invention, FIG. 1A is a schematic configuration diagram of a vehicle heating device 1A, and FIG. 1B is a perspective view of a two-hole pipe 14. is there.

  As shown in FIG. 1A, the vehicle heating apparatus 1A includes a radiator 2 that performs heat exchange between the circulating fluid and air outside the vehicle, an engine 3, and a radiator circulation pipe 4 that connects the radiator 2 and the radiator 3 to each other. And an engine cooling system that cools the engine 3 by circulating the circulating fluid between the radiator 2 and the engine 3. Further, the vehicle heating apparatus 1A includes an engine 3 that is a heating unit that heats the circulating fluid by heat exchange, and a front seat side hot water heater 5 that is a heat exchange unit that performs heat exchange between the circulating fluid and air for indoor ventilation. A first supply pipe 6 and a first return pipe 7 that connect between them, a rear seat side hot water heater 8 that is a heat exchanger that performs heat exchange between the circulating fluid and the air for indoor ventilation, A second supply pipe 10 that connects the branch part a of the supply pipe 6 and the rear seat side hot water heater 8, and a second return pipe 11 that connects the branch part b of the first return pipe 7 and the rear seat side hot water heater 8. A heater heating system that circulates the circulating fluid between the engine 3 and the front seat side hot water heater 5 and the rear seat side hot water heater 8 to warm the front seat side hot water heater 5 and the rear seat side hot water heater 8. It has.

  The front seat side hot water heater 5 and the rear seat side hot water heater 8 are connected in parallel to the engine 3, the front seat side hot water heater 5 is in the vicinity of the engine 3, and the rear seat side hot water heater 8 is They are located far away.

  The second supply pipe 10 and the second return pipe 11 of the rear seat hot water heater 8 disposed far away are routed using the branch pipe 13 and the two-hole pipe 14, and the two-hole pipe 14 is connected to the vehicle. The branch pipe 13 is used in other routing paths at locations where the floor is the routing path.

  As shown in FIG. 1B, the two-hole pipe 14 has two holes 14 b and 14 c formed in parallel inside the partition wall 14 a as a boundary, and one hole 14 b serves as a flow path of the second supply pipe 10. The other hole 14c is assigned to the flow path of the second return pipe 11 respectively.

  In the above configuration, the radiator 2 performs heat exchange between the circulating fluid and air, and is cooled so that the engine 3 is not heated to a predetermined temperature or higher by the circulating fluid cooled by the radiator 2. The circulating fluid heated by the cooling of the engine 3 is circulated to the front seat side hot water heater 5 and the rear seat side hot water heater 8, and the front seat side hot water heater 5 and the rear seat side hot water heater 8 are heated by the warm circulating fluid and air. Each exchange produces warm air. This warm air is blown out into the passenger compartment.

  In the circulation process of the circulating fluid, the circulating fluid on the supply side contacts the circulating fluid on the return side via the partition wall 14a in the two-hole pipe 14, and the circulating fluid on the supply side returns at a higher temperature than the outside air. Since heat is exchanged with the circulating fluid on the side, it is possible to effectively prevent the temperature of the circulating fluid from decreasing in the flow process of the two-hole pipe 14. Therefore, the start-up performance of the engine 3 is improved and the power is saved. Moreover, the installation space of the 2nd supply piping 10 and the 2nd return piping 11 can be made small.

  In this first embodiment, the heat exchanger has two units, a front-seat-side hot water heater 5 and a rear-seat-side hot water heater 8, and is farther from the engine 3 in the two hot-water heaters 5, 8. Since the location of the common path of the second supply pipe 10 and the second return pipe 11 of the rear seat side hot water heater 8 arranged as the two-hole pipe 14, the heating performance of the far rear rear seat hot water heater 8 is reduced. It can be suppressed as much as possible. In particular, it is possible to prevent an extreme deterioration in the heating performance of the rear seat side hot water heater 8 when the flow rate of circulating water is small.

  In the first embodiment, since the two-hole pipe 14 of the second supply pipe 10 and the second return pipe 11 is disposed under the floor of the vehicle, the outer periphery of the two-hole pipe 14 is contacted with the occupant with a cover or the like. There is no need to prevent it, and since it is not easily affected by outside air, there is no need to provide a heat insulating material covering the outer periphery of the supply pipe and the return pipe.

  2 and 3 show a second embodiment of the present invention, FIG. 2 (a) is a schematic configuration diagram of a vehicle heating device 1B, FIG. 2 (b) is a perspective view of a double pipe 15, and FIG. 2 is a cross-sectional view of a branch / collection joint pipe 16 of a heavy pipe 15. FIG.

  The second embodiment is different from the first embodiment only in that a double pipe 15 is used instead of the two-hole pipe 14. That is, as shown in FIG. 2B, the double pipe 15 has an inner peripheral side center hole 15b and an outer peripheral side ring hole 15c inside, with the cylindrical partition wall 15a as a boundary, and the central hole 15b is The ring hole 15 c is allocated to the flow path of the second return pipe 11 in the flow path of the 2 supply pipe 10.

  As the branch / collection joint pipe 16 of the double pipe 15, the pipe shown in FIG. 3 is used. The branch / collection joint pipe 16 is a double pipe that penetrates the outer joint pipe 16a having a bent portion of about 90 ° C. with respect to the axis of the double pipe 15 and the hole of the bent portion of the outer joint pipe 16a. The inner peripheral joint pipe 16b extends along the 15 axes, and branch pipes 13 (not shown) are respectively connected to both ends of the inner peripheral joint pipe 16b and the outer peripheral joint pipe 16a.

  Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  In the second embodiment, in the double pipe 15, the circulating fluid on the supply side comes into contact with the circulating fluid on the return side via the cylindrical partition wall 15a, and the circulating fluid on the supply side has a higher temperature than the outside air on the return side. Since heat is exchanged only with the circulating fluid, it is possible to more effectively prevent a temperature drop of the circulating fluid in the flow process of the double pipe 15. Therefore, the start-up performance of the engine 3 is further improved and the power is saved. Moreover, the installation space of the 2nd supply piping 10 and the 2nd return piping 11 can be made small like 1st Embodiment.

  In the first and second embodiments, the common passage between the second supply pipe 10 and the second return pipe 11 of the rear seat side hot water heater 8 is the two-hole pipe 14 or the double pipe 15. The common path of the first supply pipe 6 and the first return pipe 7 of the side hot water heater 5 may be a double-hole pipe 14 or a double pipe 15, and both the front seat side hot water heater 5 and the rear seat side hot water heater 8 are used. The common paths of the pipes 6, 7, 10, and 11 may be the two-hole pipe 14 or the double pipe 15.

  In the first and second embodiments, the heating unit is configured by the engine 3, but may be configured by a fuel cell stack or the like.

1 shows a first embodiment of the present invention, (a) is a schematic configuration diagram of a vehicle heating device, (b) is a perspective view of a two-hole piping. The 2nd Embodiment of this invention is shown, (a) is a schematic block diagram of the heating apparatus for vehicles, (b) is a perspective view of double piping. FIG. 7 is a cross-sectional view of a branch / collection joint pipe of a double pipe according to a second embodiment of the present invention. It is a schematic block diagram of the heating apparatus for vehicles which shows a prior art example.

Explanation of symbols

1A, 1B Vehicle heating system 3 Engine (heating unit)
5 Front seat side hot water heater (heat exchanger)
6 First supply pipe (supply pipe)
7 First return piping (return piping)
8 Hot water piping for rear seats (Heat exchange part)
10 Second supply pipe (supply pipe)
11 Second return piping (return piping)
14 Double-hole piping 14a Partition wall 14b, 14c Hole 15 Double piping 15a Cylindrical partition wall 15b Center hole 15c Ring hole

Claims (5)

Heating unit (3) for heating the circulating fluid, heat exchanging units (5), (8) for exchanging heat between the circulating fluid and air, the heating unit (3), and the heat exchanging units (5), (8) A vehicle heating device (1A), (1B) comprising supply pipes (6), (10) and return pipes (7), (11) for connecting between them and circulating the circulating fluid ,
The vehicle heating device (1A), (1B), wherein the supply pipe (10) and the return pipe (11) are arranged so as to be able to exchange heat. The vehicle heating device (1A) according to claim 1,
The supply pipe (10) and the return pipe (11) are two-hole pipes (14) in which two holes (14b) and (14c) are formed in parallel with a partition wall (14a) as a boundary. The vehicle heating device (1A), wherein the hole (14b) is assigned to the flow path of the supply pipe (10), and the other hole (14c) is assigned to the flow path of the return pipe (11). The vehicle heating device (1B) according to claim 1,
The supply pipe (10) and the return pipe (11) are double pipes in which an inner peripheral side center hole (15b) and an outer peripheral side ring hole (15c) are formed with a cylindrical partition wall (15a) as a boundary. 15), the center hole (15b) of the double pipe (15) is assigned to the flow path of the supply pipe (10), and the ring hole (15c) is assigned to the flow path of the return pipe (11). The vehicle heating device (1B) characterized by the above. The vehicle heating device (1A), (1B) according to claims 1 to 3,
The heat exchange units (5) and (8) have two units connected in parallel to the heating unit (3), and the heat exchange units (5) and (8) Vehicle heating characterized in that the supply pipe (10) and the return pipe (11) of the heat exchanging section (8) arranged farther than the heating section (3) are heat exchangeable pipes. Apparatus (1A), (1B). The vehicle heating device (1A), (1B) according to claims 1 to 4,
The vehicle heating device (1A) or (1B) is characterized in that the portion of the supply pipe (10) and the return pipe (11) that are heat exchangeable pipes is disposed under the floor of the vehicle.

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