JPS60222311A - Regenerative heating apparatus for vehicles - Google Patents

Abstract

PURPOSE:To make the inside of an insulating tank preventable from overheating due to the supplying heat of a heat pipe in the case where heating capacity is ample enough or in time of such warm seasons as being unnecessary for heating. CONSTITUTION:In time of starting at the winter season, if a water pump 17 is started after closing a valve (a) and opening valves (b) and (c), warm water inside a heat insulating tank 1 flows into a heater core 3 whereby the inside of a car room being benumbed with cold is rapidly warmed up. Simultaneously engine exhaust heat makes water temperature inside the heat insulating tank 1 go up, assisting the capacity of this heating cycle. When water temperature of a water jacket H of an engine becomes more than that of the heat insulating tank 1, these valves (a), (b) and (d) are all opened, entering an ordinary heating cycle and simultaneously engine cooling warm water is led into the heat insulating tank 1. When engine cooling water temperature is sufficiently raised up, the valve (d) is closed, and warm water inside the heat insulating tank 1 is made not to assist a temperature rise in the water jacket H. When internal pressure inside the heat insulating tank 1 goes up so abnormally, a pressure control valve 18 is opened.

Description

[Detailed Description of the Invention] [Field] The present invention is particularly applicable to engines! This invention relates to a regenerative heating device for vehicles that is highly effective in heating immediately after lfl operation.

[Prior Art] In today's era of universal automobiles, there is no end to the competition in technological development to improve the maneuverability and comfort of automobiles.

For example, a heater that uses radiator hot water has no use for a while after the engine starts, so you are forced to feel very cold during this time. Therefore, a method has been proposed in which a portion of the radiator hot water is stored in a heat insulating tank during operation, and for a period of time after the engine is started, the stored water is used to heat the heater core of the heater. The inventors of the present invention went further and devised a method in which high-temperature engine exhaust heat is sent into the above-mentioned heat insulating tank using a heat pipe to further enhance the instant heat effect in the vehicle interior. However, the inventors believe that if the connection is made simply using a heat pipe (), the exhaust heat will continue to be supplied to the insulation tank through the heat pipe during normal heating and even during high temperatures in summer. I realized that there is a risk of the internal pressure increasing abnormally, and that there is a possibility that the engine cooling water, which should be cooled, may be heated all over the place without causing A-varhy.

[Object of the Invention] The present invention provides a regenerative heating system in which a part of engine cooling water stored in a heat insulating tank is further heated by engine exhaust heat supplied through a pipe. When the heating capacity of the device is sufficient, or during the warm season when heating is not performed, the inside of the insulating tank is used as the heat supplied by the heat pipe.J:
The object of the present invention is to provide a means to eliminate the inconvenience of overheating.

[Structure of the Invention] The regenerative heating device for a vehicle of the present invention includes a heat insulating tank for storing engine cooling water that incorporates a heat radiation side end of a heat pipe for heat exchange of engine exhaust heat. A heater of a drought-type heating system using a heater is connected to a hot water circulation pipe for heating hot air, and is configured to heat the heater core with the heat stored in the heat insulating tank, and an engine cooling jacket. A first invention in which a reserve tank is connected via a pressure control valve to a hot water circulation pipe connecting the heat insulating tank and the engine, and an engine incorporating a heat dissipation end of a heat pipe for exchanging engine exhaust heat. A heat insulating tank for storing cooling drought water is connected to a hot water circulation pipe for heating a heater core of a drought heating system using engine cooling water, and the heater core is heated by the heat stored in the moisturizing tank. , and branching the engine exhaust duct into two paths toward the exhaust port, installing the heat absorption side end of the heat pipe in one of the branch paths, and providing an exhaust flow path switching valve at the branch point, When the temperature detected by the outside air sensor is below a predetermined value, the switching valve is operated so that the exhaust gas flows to the heat pipe installation branch road side, and when the temperature is above a predetermined value, the exhaust gas flows to the other branch road side. The second invention includes an automatic or manual control mechanism.

According to a preferred embodiment of the present invention, the reserve tank is installed within a heater duct.

[Effects of the Invention] The regenerative heating device for vehicles of the present invention has the following effects.

b) Since the reserve tank is connected via a pressure control valve to the storage heat tank that includes a heat pipe for supplying engine exhaust heat, the heat pipe overheats the heat tank during warm seasons, causing the internal pressure to drop. When the pressure rises abnormally, this high pressure can be released into the reserve tank to avoid danger.

Since a reserve tank is installed inside the heater Dow 1, the reserve tank is heated by the heater warm air during heating, and if the internal pressure of the heat retention tank drops, the water in the heated reserve tank will be reduced. It plays the role of preventing water from flowing back into the heat retention tank and cooling the heat retention tank. Also, in the summer, the cold air flowing inside the Dow 1 prevents the reserve tank from overheating.

-〇- C) The heat absorption side end of the heat pipe that supplies engine exhaust heat to the heat insulating tank is installed in one branch of the engine exhaust duct, which branches into two routes toward the exhaust port. In addition, a 1-in-1 flow switching valve is provided at the branch point of the two paths, so this switching valve can be operated automatically or manually to stop the heat pipe function in the warm season.
Overheating of the heat-retaining tank mentioned above is prevented.

[Example] Next, a regenerative heating device for a vehicle according to the present invention will be described based on an example shown in the drawings.

FIG. 1 is an explanatory diagram of a situation in which the device of the present invention is installed in an automobile, where A is an engine, B is an engine exhaust duct 1 to
C is a flow path switching valve provided at a branch point to divide the engine exhaust flow path into two, and D is an end on the endothermic side of a heat pipe 2 for sending engine exhaust temperature to a moisturizing tank 1 for engine cooling hot water. It is a heat absorption box for storage, E is the car body floor, and F is the catalyst case.

Inside the common duct of the cabin air conditioning unit G installed in front of the driver's seat are a heater core 3 whose heat source is engine cooling hot water, a heat insulating tank 1, and an A-tarjakera 1 for engine A.
i! in the heat-retaining tank 1 connected to the pipeline connecting the
! 171 A reserve tank 4 for temporarily receiving hot water is housed. ■ is the fan of air conditioning unit 1~
5 is a T engine radiator.

Next, we will explain the functional relationship between the heat insulating tank 1 and the reserve tank 4, which serve as an emergency heating source for the heater core 3 immediately after the engine starts, together with the method of operating the heating unit of the present invention.When starting the engine in winter] ] Valve a installed near the water jacket H on the hot water outbound path connecting the water jacket hH of the engine A, the heater core 3, and the heat insulation tank 1.
is closed, and the valve 1) provided between this hot water outgoing path and one drought in/out path of the heater core 3, and the reserve tank 4 are connected.
By opening the valve d interposed in the flow path between the tank 4 and the heater core 3 and starting the water pump 17, The warm water in the heat insulating tank 1 flows into the heater core 3, and the cold interior of the vehicle is temporarily warmed. At the same time, the engine exhaust heat increases the water temperature of the heat retaining tank 1 into which the heat dissipation side end is inserted via the heat pipe 2, thereby supporting the performance of this heating cycle. When the water temperature in engine A's A-tar jacket H rises above the water temperature in thermal tank 1, all valves a, b, and d are opened, and the normal heating cycle begins and hot water is heated in thermal tank 1. Introducing engine cooling drought. When the engine coolant temperature has risen sufficiently, close valve d and heat pipe 2.
This prevents the inconvenience of the wet water in the heat insulating tank 1, which continues to rise, adding to the temperature rise of the water jacket H of the engine A. When the internal pressure of the heat insulating tank 1 increases abnormally due to the heat supplied from the heat pipe 2, the pressure control valve 18 is activated, and the pressure inside the reserve tank 4 located downstream of the pressure control valve 18 is activated. Release pressure and let go.

This reserve tank 4 is exposed to the damp air of the heater.
1i Indoor air conditioning unit l-G is internally connected to the duct 1, so it is in a heating state, and if the internal pressure of the heat retention tank 1 drops, the air will flow from the reserve tank 4 to the heat retention tank 1. Warmer water will flow back, and it will also play a role in absorbing the drop in temperature of the heat-retaining tank 1. When performing summer dehumidification and O1-air conditioning (automatic air conditioning), valves b and d are closed.

FIG. 2 shows an example of the structure of the pressure control valve 18. 19 is a heat insulating tank 1, a heater core 3, and an engine Δ 4-
Tar jacket! 20 is a connection port to the reserve tank 4, 21 is a relief valve for discharging abnormally high pressure hot water in the heat retention tank 1 toward the reserve tank 4, and 22 is a connection port that connects the heat retention tank 1 to the reserve tank 4. This is a backflow valve for causing the high humidity water in the reserve tank 4 to flow back when the reserve tank 4 is placed in a reduced pressure state.

Switching operation 10 of the drought flow path for heating the heater core as described above is performed by the outside temperature sensor 27 and the engine coolant temperature sensor 25.
This is performed by the control amplifier K performing analysis based on the notification signals from each sensor of the water temperature sensor 26 in the heat retention tank 1 and issuing a command.

FIGS. 3 and 4 show a side sectional view and a top view of the driver's seat portion in which the heat insulating tank 1 is built in below.

Thermal tank 1 has a capacity of 4 to 6-1! It is made of synthetic resin, aluminum, stainless steel, etc., and has a heat-insulating coating. This heat insulation tank 1 is further integrated with a heat insulation cover 2.
It is desirable to cover it with 3. J is seat cushion, 24
is a rail for sliding the seat.

Next, a top view and side view including a partially broken surface explain the configuration of the exhaust flow path switching valve C provided at the branch point of the engine exhaust duct B and the heat absorption box D for storing the end of the heat pipe 2 on the heat absorption side. In FIGS. 5 and 6, the engine exhaust duct B is divided into two branches B' and B'- downstream of the catalyst case F, and a flow path switching valve C is installed at the branch point. A heat absorption box D is interposed in the branch passage B'''.An exhaust passage is connected to the valve body 6 of the passage switching valve C.
A damper 7 for switching to the Bh side or the Bh side is built in, and a lever 9 attached to the damper shafts 71 to 8 (-II) has a rod 11 for operating the solenoid valve 10, etc., and the damper 7 is normally connected to the branch path B. A compression spring 12 is connected to keep the valve in the intermediate state, and when the solenoid valve 10 is energized, the operating rod 11 pushes the lever 9 and the compression spring 12 switches the branch path B- to open. . 13 is a spring for keeping the damper 7 in the branch path B' open. 14 is a lead wire for sending battery current to the solenoid valve 10 via the engine key switch,
When the temperature detected by the outside air temperature sensor 27 is below 15 degrees Celsius, which requires heating, the battery current flows through the solenoid valve 1 while the engine key switch is turned on.
0 is activated, and the damper 7 is located on the side that closes the branch road B-. If the outside temperature exceeds a predetermined temperature such as 15° C., the solenoid valve 10 will not be energized even while the engine is running.
The damper 7 is switched in the direction of closing the branch path B''''. Note that fins 16 are attached to the ends of the pipes 1 to 2 placed in the heat absorption box D on the heat absorption side to improve heat transfer efficiency. The damper 7 may be operated manually.

It should be noted that the present invention is not limited to the above-described embodiment. For example, if a reserve tank 4 is provided, the flow path switching valve C is not necessarily required. Conversely, it goes without saying that the reserve tank 4 may be omitted if the flow path switching valve C is provided.

Furthermore, the present invention can be applied not only immediately after the engine is started, but also when the outside temperature is low and a large heating capacity is required, or when the engine cooling water moisture level is insufficient even during normal operation, such as in diesel engine vehicles. .

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the state in which the regenerative heating system for vehicles of the present invention is incorporated into a motor vehicle, Fig. 2 is a side sectional view of the pressure control valve, and Figs. 3 and 4 are the heat insulating tank. Figures 5 and 6 show a cross-sectional side view and a side view of the driver's seat with the engine installed underneath, and Figures 5 and 6 show the engine exhaust duct, which is a component of this device, installed at a branch point where it branches into two paths. A top view and a side view, each including a partially broken surface, showing the structure of the closed flow path switching valve and the heat absorption box for installing the heat pipe to dry the engine cooling lake water heat retention tank with engine exhaust heat. This is a diagram. In the diagram: 1... Heat retention tank 2... Heat pipe 3.
... Heater core 4 ... Reserve tank 7 ... Engine exhaust flow path switching valve damper 10 ... Solenoid valve 17 ... Water pump 18 ... Pressure control valve 27 ... Outside temperature sensor A ...・Engine B...
・Engine exhaust duct B', B''... Exhaust duct branch path C... Flow path switching valve D... Heat absorption box
G... Vehicle interior air conditioning unit 1~ a, b, d... Valve 14-

Claims (1)

[Claims] 1) An engine cooling f! that incorporates the heat radiation side end of the exhaust pipe for exchanging engine exhaust heat. I: A heat insulating tank for storing hot water is connected to a drought circulation pipe for heating a heater core of a hot water heating device using engine cooling water, and the heater core is heated by the heat stored in the heat insulating tank.J: Sea urchin configuration A regenerative heating device for a vehicle, characterized in that a reserve tank is connected to a drought circulation pipe connecting an engine cooling jacket and the heat insulation tank via a pressure control valve. 2) The regenerative heating device for a vehicle according to claim 1, wherein the reserve tank is installed in a heating heater duct. 3) A heat insulating tank for storing engine cooling hot water incorporating the heat radiation side end of a heat pipe for heat exchange of engine exhaust heat is used to circulate hot water for heating the heater core of a hot water heating system using engine cooling water. The heater core is heated by the heat stored in the heat insulating tank, and the engine exhaust ducts 1 to 1 are branched into two paths toward the exhaust port. At the same time as pulling the end of the heat absorption side of the heat pipe, an exhaust flow path switching valve is installed at the branch point, and when the exhaust gas flow detected by the outside air sensor is less than a predetermined value, the switching valve is connected to the exhaust flow path of the heat pipe. A heat storage device for a vehicle, characterized in that an automatic or manual control mechanism for the switching valve is attached for causing the flow to flow to the attached branch road side, and to flow to the other branch road side when the temperature exceeds a predetermined value. type heating device.