JPH0345416A - Heating system for vehicle - Google Patents

Abstract

PURPOSE:To secure excellent heating effect and noise suppressing effect as well respectively by partitioning a part of an exhaust chamber provided for an exhaust system at the upstream of a main muffler, thereby providing the heat receiving section of a heat pipe which feeds heat exchanging medium to a heater unit in a cabin. CONSTITUTION:An exhaust chamber 19 is interposed to the upstream side of a main muffler 17 in an exhaust tube 14 arranged within the tunnel section of a car body. In this case, the exhaust chamber 19 composed of paired upper and lower cases 21 is formed into a sand-witch shape, and its inside section is partitioned by a partition board 22 in such a way that a chamber section 23 and a heat receiving section 25 of a heat pipe 24 are provided for the afterward section and the forward section of it respectively. This permits an occupied area to be made smaller as compared with the former case wherein the chamber section 23 and the heat receiving section 25 are separately arranged, and also permits the chamber section 23 to be made larger in size in particular. This constitution enables the exhaust chamber 19 for suppressing exhaust noise to be put side by side with a type of a heating system in which the heat pipe 24 is employed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heating device for a vehicle, and particularly to one that performs heating using exhaust heat.

BACKGROUND OF THE INVENTION As shown in Fig. 4.5, a floor tunnel section 2 and an exhaust tube 3 are routed under the floor panel l of a vehicle, and a catalytic converter is installed upstream of the exhaust tube 3. A main muffler 5 is attached to the downstream side of the main muffler 4.

A heat receiving section 7 of a heat vibro is provided downstream of the catalytic converter 4.

As shown in FIG. 4, the heat receiving part 7 of the heat vibro is inserted in the middle of the exhaust tube 3, and has a plurality of U-shaped tubes 9 inside a case 8 divided into two that covers the exhaust tube 3 from above and below. is arranged.

A heat vibro that is sent to the heater unit in the room is attached to the heat receiving section 7, and due to the exhaust gas passing through the exhaust tube 3, the liquid in the heat receiving section 7 becomes evaporated gas, passes through the heat vibro, and is exchanged with the heater unit. It becomes a liquid and returns to the heat receiving part 7 (a structure using a heat pipe is disclosed in Japanese Patent Application Laid-Open No. 62-1662).
(There is one shown in Publication No. 77).

Problem to be Solved by the Invention By the way, as shown in Figure 6.7, some vehicle exhaust systems include an exhaust tube to prevent the generation of high-frequency noise due to exhaust when the engine is not very warm. There is an exhaust chamber 10 provided downstream of the catalytic converter 4 in No. 3, but when attempting to install this exhaust chamber 10 on a structure equipped with a heat vibro, the arrangement space for the exhaust chamber 10 (Fig. There is a problem in that the number of medium (L) is drastically reduced. That is, since the exhaust tube 3 is routed so as to avoid the fuel tank 11, only a limited space remains behind the heat receiving part 7 of the heat vibro and in front of the fuel tank 11 for the exhaust chamber 0. It is not.

Therefore, the present invention provides a heating device for a vehicle that allows the arrangement of an exhaust chamber.

Measures to solve the problem A part of the exhaust chamber provided in the exhaust system upstream of the main muffler is sectioned off, and the heat receiving part of the heat pipe that sends the heat exchange medium to the heater unit in the passenger compartment is placed here. be.

The working exhaust chamber is enlarged and the heat receiving part of the heat pipe is disposed inside the exhaust chamber, so that the exhaust chamber and the heat receiving part of the heat pipe can be installed together.

Example Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 2.3, an exhaust tube I4 as an exhaust system is routed within the floor tunnel portion 13 of the floor panel 12, so that the fuel tank 15 and spare tire 16 located at the rear can escape. It is connected to a main muffler 17 provided at the rear of the vehicle body.

Inside the floor tunnel section 13, there is a catalytic converter on the front side■
Further, an exhaust chamber 19 is interposed in each exhaust tube 14 at the rear of the catalytic converter 18 and in front of the fuel tank I5.

Note that a heat shield plate 20 is provided above the exhaust chamber 19.

The exhaust chamber I9 is formed into a middle shape by a pair of upper and lower cases 21, and its interior is partitioned into a front side and a rear side by a partition plate 22, with a chamber part 23 on the rear side and a chamber part 23 on the front side. A heat receiving portion 25 of the heat pipe 24 is arranged.

The exhaust tube 14 is inserted into the chamber portion 23 from the downstream side to the partition plate 22, and a plurality of holes 26 are provided in the peripheral wall of this inserted portion.

On the other hand, the heat receiving portion 25 of the heat pipe 24 is made up of a plurality of U-shaped tubes 27 attached to a casing 28, and the heat pipe 24 is attached to the casing 28.

The heat pipe 24 passes through the case 21 of the exhaust chamber I9 and extends to the heater unit in the vehicle interior.

Note that PR indicates the front side.

According to the structure of the above embodiment, the chamber section 23 and the heat receiving section 25 of the heat pipe 24 are housed in one case 21, so that the chamber section 2'JJ-)-- has a panogo') A nzP- km 9RJ-, <911JB1
．． - It takes up less space compared to the case where the chamber part 23 and the heat pipe 24
The heat receiving part 25, especially the chamber part 23, can be secured widely.

Therefore, the exhaust chamber 19 for reducing exhaust noise can be added to a heating device using a heat pipe.

As described in detail, according to the present invention, a part of the exhaust chamber provided in the exhaust system upstream of the main muffler is partitioned, and a heat exchange medium is sent to the heater unit in the passenger compartment. Since the heat-receiving part of the pipe is arranged, a large exhaust chamber can be secured, and the exhaust noise reduction effect of the exhaust chamber can be enhanced compared to when the heat-receiving part of the heat pipe and the exhaust chamber are provided separately. There is.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of an embodiment of the present invention.
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M m m +-! % Q sectional view, Figure 4 is a perspective view of the main part of the prior art, Figure 5 is the same plan view, Figure 6 is a plan view of another prior art, Figure 7 is along the ■-■ line in Figure 6. FIG. +4...Exhaust tube (exhaust system), 17...
・Main muffler, 19...Exhaust chamber, 2
4...Heat pipe, 25...Heat receiving part. Fig. 1 14----Engineer's workshop knee 7 (section 5) +7
---- Main A - 7 U + 9 --- Exhaust drying I 7 Ha 24 --- Heat H "If' 25 --- Ichisara Part 4 Figure 5

Claims (1)

[Claims] (1) A part of the exhaust chamber provided in the exhaust system upstream of the main muffler is partitioned, and a heat receiving part of a heat pipe that sends a heat exchange medium to a heater unit in the vehicle interior is arranged here. Vehicle heating system.