JP2516099Y2 - Thermostat device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of a thermostat device provided in a cooling device of an automobile.

(Prior Art) A water-cooled cooling device for an internal combustion engine (hereinafter referred to as an engine) mounted on an automobile is provided with a thermostat device for keeping the temperature of cooling water at a required temperature. This thermostat device is installed in the cooling water passage of the cooling device.When the temperature of the cooling water is low, a bypass passage is formed by the internal valve action and the cooling water is circulated in the cylinder head and the cylinder to warm up the air. Shorten,
When the temperature rises, the cooling water is made to flow through the radiator by the valve action to adjust the cooling water temperature well.

Usually, the engine and the radiator are mounted on the vehicle body with an appropriate interval. The thermostat device interposed between them has a thermocase connected to the cylinder head side, and a thermocap 1 (see FIG. 3) having a radiator hose from a radiator attached to the thermocase is integrally connected. It Therefore thermo cap 1
Is provided with a connection flange 2 to the thermo case and a mounting insert 3 for the radiator hose. The shape of the thermocap 1 is L-shaped with the extension lines of the opening end surface on the flange 2 side and the opening end surface on the mounting insertion portion 3 side orthogonal to each other.

However, in the case where both the engine and the radiator are mounted close to each other due to the layout of the engine compartment, as shown in FIG. 4, the thermostat of the thermostat device 6 interposed between the engine 4 and the radiator 5 is installed. A cap 7 (an enlarged view of which is shown in FIG. 5) having a different shape from the conventional one is adopted. This is because with the shape of the conventional thermocap 1, if the radiator hose 8 is attached to the thermocap 1, the thermocap 1 and the thermocase 9 cannot be reliably connected. The thermocaps 7 having different shapes have a deformed L shape in which the extension lines of the opening end surface on the flange 10 side and the opening end surface of the radiator hose 8 on the mounting insertion portion 11 side intersect at an acute angle. Reference numeral 12 in FIG. 4 is a water pump.

An engine cooling device that removes the air remaining in the water jacket and improves the temperature sensitivity of the thermostat is disclosed in Japanese Utility Model Publication No. 59-9118. The one disclosed in this publication is a second bypass in which a casing of a water jacket portion and a thermostat portion above the cooling water outlet is directly applied to a temperature sensing portion of the thermostat by cooling a part of cooling water for the engine through an air vent mechanism. It communicates with the waterway.

(Problems to be Solved by the Invention) As described above, the thermocaps 7 having different shapes are used.
In this case, since the opening end surface on the flange 10 side and the opening end surface on the mounting insertion portion 11 side of the radiator hose 8 intersect each other at an acute angle, the flange 10 of the thermocap 7 is processed. At the time of installation, the mounting insert of the radiator hose 8
There was a problem that 11 became an obstacle and it was difficult to process and the workability deteriorated. Further, because of the layout of the engine room, both the engine 4 and the radiator 5 are mounted close to each other, so that the thermocap 7 and the radiator hose 8 approach and contact the radiator 5 as well.

Further, the engine cooling device disclosed in Japanese Utility Model Laid-Open No. 59-9118 uses a bottom bypass system for the thermostat device, and does not solve the problems of the present invention.

The present invention solves the above-mentioned conventional problems, and improves the structure of the thermocase of the thermostat device and the thermocap attached to the thermocase to improve workability, and the thermocap and radiator hose approach and contact the radiator. It is an object of the present invention to provide a cooling device that avoids the above problems.

(Means for Solving the Problems) As a means for solving the above problems, the present invention relates to a thermostat case that connects an upper part of an automobile engine and an upper part of a radiator, and has a thermostat inside and below the radiator. Connect to the radiator side connection port on one side,
The thermostat case connects the engine-side connection port on the other side of the thermostat case to a water pump provided on the engine, and communicates with the cylinder head and the cylinder of the engine at the lower part of the thermostat case, which is opened and closed by the valve of the thermostat. The radiator-side connection port has a base end integrally formed in parallel with the axial direction of the thermostat case, and a tip end extending obliquely downwardly with respect to the axial direction. The side connection port is provided so as to project orthogonally to the axial direction of the thermostat case, and a thermocap that forms a passage that connects the radiator side connection port and the engine side connection port is provided at an upper portion of the thermostat case. When mounting and disposing the thermostat device, vertically connect the radiator side connection port. Towards, by directing the engine-side connection hole obliquely upward, in which the shaft of the thermostat device is characterized in that it is assembled to be inclined.

(Operation) Since the cooling water gradually flows into the cylinder head and the cylinder of the automobile engine, the present invention provides a cooling passage for the cooling device that connects the automobile engine and the radiator with the lower portion of the radiator and the engine. A thermostat device is interposed between them.

When the temperature of the cooling water is low, a circulation system is formed to circulate the cooling water in the engine. Therefore, the thermostat case is connected to the lower part of the thermostat case, the cylinder head of the engine and the inside of the cylinder are opened and closed by the thermostat. Form a bypass port. A bypass is formed by opening the bypass port.

When the temperature of the cooling water becomes high, the valve action of the thermostat device closes the bypass port and switches the cooling water of the radiator to flow into the engine. ,
A radiator cooling system is formed to flow into the cylinder head and the cylinder.

When the temperature rises, the bypass port closes and becomes a radiator cooling system.However, when cooling water cooled by the radiator flows into the thermostat device, the temperature of the cooling water decreases, and the thermostat works to open the bypass port. Open,
Once again, a circulation system will be created and high-temperature cooling water will circulate. As a result, the cooling water having a low temperature does not suddenly flow into the engine, and the cooling water having a high temperature and the cooling water having a low temperature are mixed and flow into the engine.

Also, the base end portion is integrally extended to one end of the thermostat case in parallel with the axial direction of the thermostat case,
A radiator-side connection port is formed whose tip portion extends obliquely downward with respect to the axial direction. Further, an engine-side connecting port orthogonal to the axial direction of the thermostat case is provided on the side surface of the other side portion of the thermostat case so as to project.

When disposing the thermostat case, make sure that the axial direction of the thermostat case is diagonal.
Position the radiator side connection port vertically downward, position the engine side connection port diagonally upward, connect the radiator hose to the radiator side connection port, and connect the engine side connection port to the cooling water channel communicating with the upper water pump Let

Further, in order to connect the radiator side connection port and the pump connection port, a thermo cap is attached to the upper part of the thermostat case.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a schematic view of a thermostat device according to the present invention, and FIG. 2 is a side view of the thermostat device 13 in an arranged state. As shown in the figure, the upper portion of the automobile engine 16 and the upper portion of the radiator 14 are connected by a hose 25 to form an upper passage.
Further, the lower portion of the radiator 14 and one side portion of the thermostat device 13 provided on the engine 16 side, that is, the lower side are connected by a radiator hose 15 extending upward to form a lower passage.

Further, the other side portion of the thermostat device 13, that is, the upper side, and the water pump 17 of the engine 16 are connected by a hose extending further above the radiator hose 15 to form a cooling water passage 18.

In this way, in the cooling passage of the cooling device that connects the automobile engine 16 and the radiator 14, the thermostat device 13 has a radiator hose 15 connected to a lower portion of the radiator 14.
And a cooling water passage 18 connected to the water pump 17 on the engine 16 side. In addition, in FIG.
White arrows indicate the flow of cooling water. The thermostat device 13 will be described in detail below. The thermostat device 13 is roughly constituted by a thermostat case 19 and a thermocap 20. Inside the thermostat case 19, if the temperature of the cooling water is low, the bypass port
21 is opened to form a bypass (circulation system in the engine),
A thermostat 22 is provided which closes the bypass port 21 when the temperature of the cooling water becomes high to form a passage (radiator cooling system) to the radiator 14. Also, on one side of the thermostat case 19, that is, on the lower side in the figure, there is a radiator.
A radiator side connection port 23 communicating with 14 is provided. Further, on the side surface of the other side portion of the thermostat case 19, that is, on the upper side in the drawing, the engine is mounted via the water pump 17.
An engine side connection port 24 communicating with 16 is formed.

Radiator side connection port 23 (hereinafter simply referred to as connection port 23)
Has a shape in which the base end is integrally extended to the side wall in parallel with the axial direction of the thermostat case 19, and the tip end side is extended obliquely downward with respect to the axial direction of the case 19. The engine-side connection port 24 (hereinafter, simply referred to as the connection port 24) is provided on the side wall surface so as to be orthogonal to the axial direction of the thermostat case 19. The connection port 23 is a hose attachment insertion part into which the radiator hose 15 connected to the radiator 14 is fitted, and the connection port 24 is a connection part to which the cooling water passage 18 from the water pump 17 is connected.

Further, a thermocap 20 is attached to the upper part of the thermostat case 19, and the thermocap 20 forms a passage for connecting a connection port 23 communicating with the radiator 14 and a connection port 24 communicating with the water pump 17 of the engine 16. It

With the above configuration, even if both the engine 16 and the radiator 14 are arranged close to each other due to the layout of the engine room, the thermocap of the thermostat device 13
Since 20 does not have a connecting port 23 leading to the radiator 14, that is, since the connecting port 23 is provided in the thermostat case 19, the thermostat case 19 has a thermocap 20.
Even if you fit, the thermocap 20 is a thermostat case.
It has no effect on the connection between 19 and radiator hose 15. Therefore, the distance between the radiator 14 and the thermocap 20 and between the radiator 14 and the radiator hose 15 can be increased. In addition, since it is not necessary to provide the radiator cap with a connection port to the radiator, the flange and the like can be easily processed. In addition, the thermostat device 13 is attached to the radiator 14
Since it was interposed between the lower part of the engine 16 and the water pump 17 on the engine 16 side, the cooling water temperature rises from the circulation system inside the engine 16 that opened the bypass port 21 at low temperature, and the thermostat 22 When the bypass port 12 is closed and the low-temperature cooling water that has passed through the radiator 14 is switched to the radiator cooling system that flows into the engine 16 via the thermostat device 13, the cooling water causes the thermostat device 13 to operate.
The bypass port 21 of will be opened again. By this, suddenly cooled water does not flow into the engine 16 side, that is, without flowing the cooling water of the engine internal circulation system and the cooling water of the radiator cooling system by switching at once.
A cooling system that gradually mixes is formed to prevent problems such as deterioration of engine durability.

In the present embodiment, the thermocap 20 is set to a certain height, and the internal space formed by the thermocap 20 is a passage that connects the connection port 23 that communicates with the radiator 14 and the connection port 24 that communicates with the engine 16. Without making the thermocap 20 flat, lower the thermostat 22 inside the thermostat case 19 and cut out the upper wall part of the thermostat case 19 to connect the inside of the thermostat case 19 and the connection port 23 to the radiator 14 to each other. May be formed.

(Effect of the Invention) As described above, the present invention connects the upper part of the automobile engine and the upper part of the radiator, and the radiator side connection port of one side of the thermostat case having the thermostat inside the lower part of the radiator. Since the engine side connection port of the other side of the thermostat case and the water pump provided in the engine are connected, the thermostat device of the cooling passage of the cooling device is connected between the lower part of the radiator and the engine. It will be interposed between them.

This allows the cooling water to gradually flow into the cylinder head and the cylinder of the automobile engine.
That is, the cooling water of the circulation system in the engine and the cooling water of the radiator cooling system are switched at once, and the cooling water that has cooled rapidly is not poured into the engine side, but the cooling water of the circulation system in the engine and the radiator are cooled. The cooling water in the cooling system is made to gradually mix with the cooling water. As a result, it is possible to avoid problems such as deterioration of durability of the engine.

In addition, a bypass port, which is opened and closed by a thermostat valve and which communicates with the cylinder head and the cylinder of the engine, is provided at the bottom of the thermostat case, so when the cooling water temperature is low, the bypass port is opened to circulate in the engine. When a cooling water temperature becomes high by forming a circulation system, a bypass cooling port is closed to form a radiator cooling system that allows the cooling water of the radiator to flow into the engine.
As a result, as described above, the cooling water of the circulation system and the cooling water of the radiator cooling system can be mixed and made to flow into the engine.

Also, the radiator side connection port of the thermostat case is
The base end portion is integrally formed in parallel with the axial direction of the thermostat case, and the distal end portion is formed obliquely downward with respect to the axial direction, and the engine-side connection port is formed in the axial direction of the thermostat case. Is formed so as to be orthogonal to. Since the radiator-side connection port and the engine-side connection port are formed in the thermostat case in this way, the thermostat case can be freely arranged as a single unit.

Further, when the thermostat device is provided, the radiator-side connecting port is directed vertically downward and the engine-side connecting port is directed obliquely upward so that the shaft of the thermostat device can be tilted and assembled. With this, when the radiator hose is connected to the radiator side connection port, it is possible to shorten the routing of the pipe from the lower part of the radiator to the upper water pump.

The thermocap attached to the upper part of the thermostat case only connects the radiator side connection port and the engine side connection port, and since the radiator side connection port that communicates with the radiator is not formed, this thermocap However, there is no influence on the connection between the radiator hose and the thermostat case.

Furthermore, even if both the engine and the radiator are arranged close to each other in the engine compartment, the radiator cap does not have a radiator-side connecting port that leads to the radiator, so a large gap can be secured between the radiator and the thermostat device. It is possible to avoid problems such as damage to the thermocap and the like. Further, as a result, the radiator and the engine can be brought closer to each other, so that the engine room can be made smaller. Further, since it is not necessary to provide the radiator-side connecting port communicating with the radiator in the thermocap, the thermocap can be easily processed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a side view showing an arrangement state of a thermostat device of the present application, and FIG.
FIG. 4 is a side view of a conventional thermocap, FIG. 4 is a side view showing an arrangement state of a conventional thermostat device, and FIG. 5 is a side view of a thermocap used in FIG. 13 …… Thermostat device 14 …… Radiator 16 …… Engine 19 …… Thermostat case 20 …… Thermocap 21 …… Bypass port 22 …… Thermostat 23 …… Connection port 24 …… Connection port

Claims (1)

(57) [Scope of utility model registration request] 1. An automobile engine upper part and a radiator upper part are connected to each other, and a lower part of the radiator is connected to a radiator side connecting port of one side of a thermostat case having a thermostat inside, and the other side of the thermostat case is connected. A side engine-side connection port and a water pump provided in the engine are connected, and a bypass port, which is opened and closed by a valve of the thermostat, is provided in a lower portion of the thermostat case and communicates with a cylinder head of the engine and a cylinder. The radiator-side connection port has a base end portion integrally formed in parallel with an axial direction of the thermostat case, a tip end portion extending obliquely downward with respect to the axial direction, the engine-side connection port, It is provided so as to project orthogonally to the axial direction of the thermostat case, and is provided on the upper part of the thermostat case. A thermocap that forms a passage that connects the radiator-side connection port and the engine-side connection port is attached, and when the thermostat device is arranged, the radiator-side connection port is directed vertically downward, and the engine-side connection port is A cooling device in which the shaft of the thermostat device is assembled so as to be inclined by being directed obliquely upward.