JPH02237814A - Car cabin warming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an interior heating system for a KIJI vehicle using a burner.

[Conventional technology]

Conventionally, indoor heating of automobiles has been carried out by extracting cooling water from an engine 41 through a hot water pipe 42 (7) and passing it to a heater body 43 (inside of which a heater core and electric blower are installed). Warm air was supplied by heating the air to V8 degrees.

In addition, in the figure, 44 is a defroster nozzle, and 45 is a controller.
・Shows the roll panel.

[Problem to be solved by the invention]

However, in recent years, engines with superior thermal efficiency, especially small direct-injection engines, have become more difficult to warm the cooling water due to the improved thermal efficiency, and as a result, it takes longer to warm up the interior in winter than before. There was a problem in that the driver had to drive in a very uncomfortable condition during that time.

In order to shorten the time it takes for the engine to warm up, various measures have been taken, such as reducing the amount of cooling water and increasing the operating temperature of the engine by restricting intake air, but none of these measures sufficiently address the above problem. It was not something that could be resolved.

The purpose of this invention is to solve the above-mentioned indoor heating problems, and to provide a heating system that can immediately heat the room using a heater even immediately after the engine starts, and to provide a heating system that can immediately heat the room immediately after the engine starts. The present invention provides an interior heating system for an automobile that is configured to be able to be connected to a heating system that heats engine cooling water that cannot be used for air conditioning, and achieves effective interior heating. That's true.

[Means for Solving the Problems] In order to achieve the above object, the present invention is accomplished as follows. That is, the present invention provides an air pipe that passes through a heat exchanger that exchanges heat between combustion gas generated from a burner and indoor heating air, or an air pipe that bypasses the heat exchanger, and connects the air pipe that passes through the hot water pipe to the cooling 11 ( This invention relates to an indoor heating system for an automobile, which is configured to be switchable by a switching valve so that air for indoor heating is circulated without being introduced from the human body into a heater in which water is circulated.

In addition, in this automatic blood room heating system, when the temperature of the engine cooling water reaches the set temperature is detected, the valve is stopped and the switching valve is switched. , room heating air flows bypassing the heat exchanger.

[Effect]

The automatic heavy-duty indoor heating device according to this invention is disclosed in 61 of Doichiki.
, is configured as follows, and operates as follows.

In other words, this automotive indoor heating system! The J device connects an air pipe line passing through a heat exchanger that exchanges heat between the combustion gas generated from the burner and room heating air, or an air pipe line that bypasses the heat exchanger, and connects the hot water pipe with cooling water. In the heating device using the burner, the vaporization heater and the ignition heater are heated immediately. Right, after the burner fuel supplied from the fuel passage has vaporized? ζ, ignite and burner fuel burns t
7. High-temperature combustion gas is immediately generated, and indoor heating can be performed immediately even after the engine is started. In addition, when the temperature sensor that detects the cooling water temperature detects that the cooling water temperature has reached the set temperature, the heating by the burner is stopped and the heat exchanger is turned off by the switching valve.
The system switches to a heating system that uses engine cooling water to heat the room heating air, making it possible to heat the room extremely effectively. [Embodiment] Hereinafter, an embodiment of the automatic indoor heating system for municipal use according to the present invention will be described with reference to the drawings.

Figure 1 shows. FIG. 2 is an explanatory diagram of an embodiment of the indoor heating system for an automobile according to the second invention.

In this automotive interior heating system, a combustor, that is, a burner 10 is provided in the middle of an intake pipe 4 of a diesel or gasoline engine 1.
A heat exchanger 20 is installed immediately after the Shimotaki side of 0. In this embodiment, the heat exchanger 20 is connected via a three-way switching valve 7.7 to a section of an air pipe 6 for indoor heating that heats the inside of the driver's cab 5 of the motor vehicle. When the three-way switching valve 7.7 connects the medium inlet pipe 21 and the medium outlet pipe 22 of the heat exchanger 20 to the air pipe line 6, air is sent from the wood body 3. is sent into the driver's cab 5 through a heated medium passage in the heat exchanger 20. In the figure, 2 is a hot water pipe that circulates cooling water to the heater wood body 3, and I1 is a fuel passage that supplies fuel from the fuel tank 12 to the burner 10.

Further, the combustion operation of the burner 10 and the switching operation of the three-way switching valve 77 are performed by a control device π30 connected thereto. This control device 30 controls the inflow from the fuel flow sensor 3 which detects the fuel flow rate of the fuel injection pump (shown in the figure) of the engine 1 and the engine 1.
The operating condition of the engine 1 can be detected by input from a rotational speed sensor 32 that detects the rotational speed of the engine 1, and the burner fuel can be controlled according to the operating condition. Furthermore,
A temperature sensor 33 that detects the temperature of the cooling water of the engine 1 is connected to the control device 30, and when the temperature of the cooling water reaches the set temperature, the engine 1 is considered to have warmed up and the heating by the burner 10 is stopped. Stop, switch the three-way one-way valve 7.7, and control g? so that air for indoor heating flows through the heat exchanger 20 by bypassing the heat exchanger 20. 13o is configured to operate.

FIG. 2 is a partially cutaway perspective view showing the specific internal structure of the heat exchanger 20 of FIG. The annular flow passages 2415 are bulged out, and the inner sides of the annular flow passages 2415 are open to the main body casing 23, and the medium inflow pipe 21 and the medium outflow pipe 22 are connected to their respective ends. are doing. Inside the main casing 23, a heat exchange cylinder 2G made of stainless steel or the like is housed LI37, which divides the inside of the main casing 23 into inner and outer parts. This heat exchange cylinder 26 is designed to efficiently perform silent exchange between the medium flowing inside the tube and the medium flowing through the heated medium passage 28 formed between the outside of the tube and the main gating 23. The cylinder part is formed in a pleated or wavy shape, and is formed so that the contact area is as wide as possible. In this part, the medium flowing in the heat exchange cylinder 26 is
A bar 27 is provided on the inner wall side of the wall.

FIG. 3 is a sectional view showing a specific example of the burner 10.

The burner 10 provided in the middle of the intake pipe 4 includes a fuel vaporization heater 13 provided at the opening of the fuel passage 11 in the intake pipe 4 and an ignition heater 14 provided on the lower liquid side thereof. These heaters have a capacity of 30 mm per unit.
Generates heat due to the current from the These heaters 13.14
For this purpose, a heater made of ceramics may be used, which is heated immediately after being energized to reach the vaporization temperature and ignition temperature (900° C.) of the fuel.

When the engine is started with this configuration, the vaporization heater l3 and the ignition heater 14 are immediately heated, and the burner fuel F supplied from the fuel passage 11 is vaporized and then introduced into the intake pipe line 4. , is ignited. When the engine starts, air flows into the intake pipe 4, so the burner fuel F is combusted, and the high-temperature combustion gas a-h is introduced into the heat exchanger 20.

Therefore, in the heat exchanger 20 applied to this automatic Ichikawa indoor heating system, the combustion gas G caused by the burner 10 flowing into the heat exchanger 20 from the intake pipe line 4 is indicated by the solid line arrow in FIG. As shown, the indoor heating air A that flows in a distributed manner through the inner wall of the heat exchange cylinder 26 and flows into the annular flow path 24 from the medium inflow pipe 21 is transferred to the main body casing 23, . ! :'4tl. between heat exchange cylinder 2G. It is divided into the heating medium passage 2B and flows from the lower side of the combustion gas G toward the upper slag side as shown by the chain arrow (r): It is heated by heat exchange with the combustion gas G. It is desirable that the outside of the main casing 23 of the heat exchanger 20 J6 be covered with a heat insulating material to avoid heat dissipation.
stomach.

The indoor heating system for automobiles is configured as described above.
Warm up the engine after starting)! At the time of switching, combustion gas G generated in the burner 10 is introduced into the heat exchanger 20. The air A sent from the heater zero body 3 (not calm because the cooling water of the engine 1 is cold) passes through the three-way switching valve 7 and flows from the medium lacquered pipe 21 to the downstream side of the heat exchanger 20. The gas flows through the heat exchanger 20 in the opposite direction to the flow of the combustion gas G, is heated, and passes through the medium outlet pipe 22 and the three-way switching valve 7 to the room heating air pipe 6 to the operator's cabin 5. It is released inside.
Therefore, the air A introduced into the driver's cab 5 is sufficiently warm even immediately after the engine is started, and the temperature in the driver's cab 5 reaches a comfortable temperature in a short time even in winter. 4, the remaining high-temperature combustion gas G is introduced into the engine 1, except for the heat taken away by the indoor heating air 8, which improves the startability of the engine. In addition, heat exchange with the cooling water around the cylinder body is promoted, and the warmth of the engine itself is improved. For example, since the air A is once warmed by the heater body 3 and reheated by the heat exchanger 20, the indoor heating effect is further enhanced.

Furthermore, when the engine 1 is warmed up as described in Section 2 and the cooling water temperature reaches a temperature sufficient to heat indoor heating air, this is detected by the temperature sensor 33, and the control device 30 As described above, the operation of the burner 10 is stopped and the heat exchanger 20 for indoor heating air A is bypassed. FIG. 5 shows another embodiment of the automotive indoor heating system according to the present invention. In this embodiment, a cooling water circulation passage, for example, a heater body (not shown) is shown.
A heat exchanger 20 installed in the intake pipe line 4 is connected via a three-way switching valve 7.7 to a partial section of the hot water pipe 2 through which cooling water is circulated.

When the engine warms up continuously, the burner 10 and the heat exchanger 20 are used to heat the cooling water. This improves engine startability and warm-up performance.

The structure and mechanism of other parts in this embodiment are the same as those in the embodiment shown in FIG. 1, so the same reference numerals will be given and the explanation thereof will be omitted.

[Effects of the Invention] As explained above, the indoor heating device for a car according to the present invention has an air pipe line passing through a heat exchanger that exchanges heat between combustion gas generated from a burner and indoor heating air, or The air pipe line that bypasses the exchanger is configured so that it can be switched by a switching valve so that indoor heating air introduced from the heater body, which circulates cooling water through hot water pipes, circulates.
In the heating device using the burner, the vaporization heater and the ignition heater are heated immediately and the burner fuel supplied from the fuel passage is vaporized, then ignited and the burner fuel is combusted, resulting in immediate high-temperature combustion. It has the excellent effect of generating gas and immediately heating the room even after the engine has started, so that the driver does not feel any discomfort. detecting and allowing room heating air to bypass the heat exchanger and deactivating the burner;
Room heating can be performed extremely effectively.

[Brief explanation of drawings]

FIG. 1 is a structural explanatory diagram showing an embodiment of the automatic indoor heating bag holder according to the present invention, FIG. 2 is a partially cutaway perspective view showing an example of the heat exchanger shown in FIG. 1, and FIG. 1 is a sectional view showing an example of the burner, FIG. 4 is a sectional view of the heat exchanger shown in FIG. 2 without showing the residue of the heat exchange medium in the heat exchanger, and FIG. FIG. 6 is an explanatory diagram showing another embodiment of the indoor heating device, and FIG. 6 is an explanatory diagram showing an example of a conventional hot water heater for an automobile. 1..1.1.1 engine, 2..1 hot water piping, 3..
...-Heater body, 4--One intake pipe, 6--
...1 air pipe line, 7...3-way switching valve, 101...
...burner, 11---1, fuel passage, l2...
1.1 fuel tank, 13-.1... vaporization heater, 14
-・One ignition heater, 20-・−・One heat exchanger, 24.
25...1.Annular flow path, 26.1.1 heat exchange tube, 2
7.1.-Baffle bar, 30...--1 control device, 31-
・1 fuel flow rate sensor, 32--1 revolution speed sensor, 33-- temperature sensor Applicant: Izuzo Jidosha Co., Ltd. Patent attorney Kazuo Onaka Sodai 3 Kyodai 4 Kyōdai

Claims (2)

[Claims] (1) Engine cooling water circulates through a hot water pipe through an air pipe that passes through a heat exchanger that exchanges heat between the combustion gas generated from the burner and indoor heating air, or an air pipe that bypasses the heat exchanger. An indoor heating device for an automobile, characterized in that it is configured to be switchable by a switching valve so that indoor heating air introduced from the heater main body is circulated. (2) When a temperature state in which the cooling water temperature of the engine reaches a set temperature is detected, the operation of the burner is stopped and the switching valve is switched, and the air pipe through which room heating air bypasses the heat exchanger is detected. The indoor heating device for an automobile according to claim 1, characterized in that the air flows through a channel.