KR20010056322A - Control apparatus for temperature of cooling water - Google Patents

Abstract

PURPOSE: A cooling water temperature controller is provided to improve the responsiveness of a valve by minimizing the influence of the pressure of cooling water, to surely open and shut off the valve and to prevent the leakage of water due to impurities in cooling water. CONSTITUTION: A temperature controller comprises: casings(1,2) having a cooling water inlet(3), a radiator side cooling water outlet(4) and a water pump side cooling water outlet(6); a lower guide cylinder(5); an upper guide cylinder(7); a pipe valve(8) whose upper and lower portions are fitted in the upper and lower guide cylinders; an upper valve hole(10) exposed to the inside of the casing with response to the descent of the pipe valve and closed by the upper guide cylinder with response to the ascent of the pipe valve; a lower valve hole(11) closed by the lower guide cylinder with response to the descent of the pipe valve and exposed to the inside of the casing with response to the ascent of the pipe valve; a barrier(18) isolating the upper valve hole from the lower valve hole; and a wax type thermostat(12) descending the pipe valve with response to the high temperature of cooling water and ascending the pipe valve with response to the low temperature of the cooling water. With the temperature rising of the cooling water, the upper valve hole is opened while the lower valve hole is closed by the descent of the pipe valve. Then, the cooling water passing through the upper valve hole is closed by the barrier and is restrained from flowing to the cooling water outlet. With the temperature falling of the cooling water, a wax body(13) contracts and the pipe valve ascends by the elasticity of a spring(17). The upper valve hole is closed and the lower valve hole is opened. Thus, cooling water is restrained from flowing to a radiator. Cooling water directly flows into a water pump without passing through the radiator.

Description

Control apparatus for temperature of cooling water

The present invention relates to a cooling water temperature control device.

The temperature of the combustion gas in the cylinder is higher than 2000 ℃, but a considerable amount of this heat is absorbed by the cylinder, the cylinder head, and the piston instead of being released to the outside. If the temperature of these parts rises excessively, the cylinder may deform or Degradation of the oil film on the cylinder wall leads to poor lubrication, severe damage to the engine, and worsening of combustion, resulting in knocking and premature ignition, leading to a sharp drop in output.

On the contrary, if the engine is cooled too much, the amount of heat lost by the combustion increases due to combustion, which lowers the thermal efficiency of the engine, thereby increasing fuel consumption, and because gasoline is supplied due to the insufficiency of gasoline in the cylinder. This can cause the engine oil to thin and accelerate the wear of the cylinder.

In order to eliminate the problems caused by the engine overheating, the coolant is circulated inside the engine to cool the superheated engine, and the coolant obtained in the process is radiated and cooled through a radiator.

However, when the engine is not cooled to the proper temperature due to the initial start of the engine or the low speed operation state, when the coolant is circulated to the radiator, the engine is warmed up for a long time, which causes various side effects as described above.

Therefore, in the middle of the cooling circuit, as shown in FIG. 4, a thermostat 20 (thermostat) is installed, and when the cooling water temperature reaches an appropriate temperature, the valve 21 is opened to circulate the cooling water through the outlet 22 through the outlet 22. If the cooling water temperature is below the proper temperature, for example, 80 ° C., the valve 21 is closed, the valve 23 is opened, the radiator side is closed, and immediately through the outlet port 24 to the water pump side without passing through the radiator side. As it is introduced and circulates the engine, the preheating time of the engine is shortened.

However, according to the thermostat 20 of the conventional structure, when the radiator on-off valve 21 is opened, it is subjected to resistance under the influence of water pressure. Accordingly, an overshoot occurs due to a responsiveness delay when the valve is initially opened. There is a problem that can cause engine overheating.

In addition, since the impurities in the coolant adhere to the valve seat surfaces 25 and 26, it is difficult to completely close the upper and lower valves 21 and 23, which results in a slight leakage phenomenon. There is a problem that causes.

On the other hand, the conventional structure described above is complicated in the structure of the thermostat 20, the size of the case 27, 28 is relatively large compared to the size of the thermostat, causing a cost increase, the layout of the engine room The problem of making things worse is also pointed out.

Accordingly, the present invention has been proposed in view of the above problems, and its object is to reduce the influence of the coolant water pressure in opening and closing the valve, thereby improving the operation response of the valve, ensuring the opening and closing operation, and causing leakage due to coolant impurities. It is to provide a cooling water temperature control device of a novel structure without the phenomenon.

In order to achieve the above object, the cooling water temperature adjusting device of the present invention comprises: a casing having a cooling water inlet, a radiator side outlet, and a water pump side outlet;

A lower guide cylinder formed concentrically with the water pump side outlet;

An upper guide cylindrical portion fixedly installed so as to face the upper portion of the casing, which is coaxial with the lower guide cylindrical portion, on an outlet side of the radiator;

A pipe valve in which an upper and a lower part are fitted to the upper and lower guide cylindrical portions and are allowed to move up and down along the guide of the cylindrical portion;

An upper valve hole formed in the upper periphery of the cylindrical surface of the pipe valve, the pipe valve being exposed to the space in the casing when the pipe valve descends and blocked by the upper guide cylinder when the pipe valve is raised;

A lower valve hole formed at a lower outer circumference of the cylindrical surface of the pipe valve, the pipe valve being blocked by the lower guide cylinder when the pipe valve descends, and exposed to the space in the casing when the pipe valve is raised;

A blocking wall that blocks the middle of the pipe valve so that the upper and lower valve holes are disconnected from each other and partitions the upper and lower valve holes up and down;

When the cooling water temperature is high, the pipe-type valve is lowered, and when the cooling water temperature is low, it characterized in that it comprises a wax type thermostat that operates to raise the pipe-type valve.

According to the second aspect of the present invention, the wax type thermostat is a rod that descends and rises in conjunction with the expansion and contraction of the wax body contained in the wax pellet, and the rod is in a state of descending to the maximum, and the upper valve hole A rod supporting jaw protruding outward from a pipe-type valve to support a lower end of the rod in the state exposed in the casing;

And a spring for applying a force in a direction in which the pipe-type valve is always raised.

According to claim 3 of the present invention, the spring is characterized in that the upper end is fixed to the upper guide cylindrical portion of the upper side, the lower end is a tension spring fixed to the rod supporting jaw.

According to claim 4 of the present invention, the spring is characterized in that the lower end is fixed to the lower portion of the casing and the upper end is a compression spring for the elastic support of the rod supporting jaw.

According to claim 5 of the present invention, a plurality of upper and lower valve holes are formed on the outer circumferential surface of the pipe-type valve.

1 is an exploded cross-sectional view of parts of a cooling water temperature adjusting apparatus according to the present invention.

2 is a view showing the operating state of the present invention at a high temperature of the cooling water temperature

3 is a view showing the operating state of the present invention when the temperature of the cooling water low temperature

4 is a conventional thermostat

※ Explanation of codes for main parts of drawing

1,2 Casing 3: Cooling water inlet

4 coolant outlet 5 lower guide cylinder

6 coolant outlet 7 upper guide cylinder

8: pipe type valve 9: space

10: upper valve ball 11: lower valve ball

12: thermostat 13: wax body

14: wax pellet 15: rod

16: rod support jaw 17: spring

18: blocking wall

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

1 is an exploded cross-sectional view of parts of a cooling water temperature control apparatus according to the present invention, and FIGS. 2 and 3 are views illustrating an operating state of the present invention according to cooling water temperature.

In the drawings, reference numerals 1 and 2 are casings, and the casings 1 and 2 are composed of a lower part 1 and an upper part 2.

Cooling water inlet (3) and the cooling water outlet (4) is formed in the lower casing (1), the coolant inlet and outlet (3) (4) is approximately 90 ° direction, the outlet 4 is on the water pump side Connected.

On the outlet 4 side of the lower casing 1, the lower guide cylindrical part 5 protrudes to the upper side so that it may become concentric. The upper casing 2 is formed with a cooling water outlet 6 connected to the radiator side.

The upper and lower guide cylindrical portions 7 and 5 are coaxially formed with the lower guide cylindrical portion 5 and fixed to the connecting portion of the lower casing and the upper casing 2 and have the same inner diameter. Facing each other.

The upper and lower guide cylindrical portions (7) (5) are fitted with a pipe-type valve (8) is fitted, the pipe-shaped valve (8) without departing from the restraint of the upper and lower guide cylindrical portion (7) (5) Sliding up and down is possible.

The pipe-type valve 8 is exposed in the space 9 of the lower casing 1 in the lowered state on the upper side of the pipe-type valve 8, and the upper guide cylindrical portion 7 when the pipe-type valve 8 is raised. The upper valve hole 10 is blocked by the () is perforated, the upper valve hole 10 is formed at least one on the circumferential surface.

In addition, the lower side of the pipe-type valve (8) is blocked by the lower guide cylindrical portion (5) in the lowered state when the pipe-type valve (8) is lowered, the lower casing (1) when the pipe-type valve (8) is raised The lower valve hole 11 which is revealed in the space 9 of the hole is drilled, and one or more lower valve holes 11 are also formed.

A thermostat 12 is fixedly installed at an upper side of the lower casing 1, and the thermostat 12 has a wax pellet 14 accommodating the wax body 13 therein and an expansion of the wax body 13. And a rod 15, which is protruded and formed on the outer circumference of the pipe-type valve 8 so as to support the lower end of the rod 15, which is lowered and raised by contraction.

The rod support jaw 16 is installed at the position where the rod 15 is extended downward, and the upper valve hole 10 is exposed, and the lower valve hole 11 is completely blocked. On the basis of the position state of the rod 15 has a position to be in contact with the lower end.

When the spring 17 is configured as a tension spring, the upper end is fixed to the upper guide cylindrical portion and the lower end is fixed to the rod supporting jaw 16, and the restoring elastic force is accumulated therein as the rod 15 is lowered. .

However, when the spring 17 is used as a compression spring, the installation state is different. In this case, the bottom of the spring is fixed to the bottom of the lower casing 1 and the top is installed to support the rod support jaw 16 in a spring-loaded manner. (Not shown).

As a result, when the rod 15 descends, the compression spring is compressed, and the restoring elastic force is accumulated therein.

Reference numeral 18 denotes a barrier wall partitioning the middle of the pipe valve 8 up and down so that the upper and lower valve holes 10 and 11 are disconnected from each other.

In the present invention, when the temperature of the cooling water rises, the rod 15 descends due to thermal expansion of the wax body 13 and the pipe-type valve 8 also descends so that the upper valve hole 10 is opened and the lower valve hole ( 11) is blocked.

At this time, the coolant passing through the upper valve hole 10 is blocked by the blocking wall 18 so that the flow does not occur toward the coolant outlet 4.

Accordingly, the high temperature coolant flows through the upper valve hole 10 to the radiator side through the outlet port 6, radiates and cools down, and then circulates to the engine by the water pump, and the lower valve hole 11 is blocked so that the outlet port 4 Direct inflow of coolant to the water pump side is blocked.

At this time, the coolant passing through the upper valve hole 10 is blocked by the blocking wall 18 so that the flow does not occur toward the coolant outlet 4.

On the other hand, when the temperature of the cooling water is lowered, the wax body 13 contracts, and the pipe-type valve 8 is raised by the restoring elastic force of the spring 17 acting in the direction opposite to the expansion force of the wax body. Accordingly, since the upper valve hole 10 is blocked and the lower valve hole 11 is exposed to the space 9 to open, the flow of the cooling water to the radiator is blocked, and the cooling water is discharged through the open lower valve hole 11. After 4), it flows directly into the water pump without passing through the radiator and circulates the engine.

At this time, since the wall thickness cross-sectional area of the pipe-type valve 8 is very small and both ends are not exposed in the space 9, the pipe-type valve 8 receives little resistance due to the coolant flow when it moves in the axial direction.

In addition, the contact surface between the valve 8 and the upper and lower guide cylinders 7 and 5 is a sliding contact system in which shear force is applied, so that foreign matters of the coolant are not attached to the contact surface, and the opening and closing operation of the upper and lower valve holes is assured. This prevents leakage of coolant and other coolant situations.

According to the present invention as described above, the operation of the valve is not affected by the coolant water pressure and operates only by the temperature change of the coolant temperature, so that the operation response of the valve is excellent and the overheating of the engine due to the delayed opening of the valve is achieved. This prevents coolant impurities from interfering in the valve seat and prevents the valve from overheating and overcooling the engine by leaking coolant.

Claims (5)

A casing having a cooling water inlet, a radiator side outlet, and a water pump side outlet; A lower guide cylinder formed concentrically with the water pump side outlet; An upper guide cylindrical portion fixedly installed so as to face the upper portion of the casing, which is coaxial with the lower guide cylindrical portion, on an outlet side of the radiator; A pipe valve in which an upper and a lower part are fitted to the upper and lower guide cylindrical portions and are allowed to move up and down along the guide of the cylindrical portion; An upper valve hole formed in the upper periphery of the cylindrical surface of the pipe valve, the pipe valve being exposed to the space in the casing when the pipe valve descends and blocked by the upper guide cylinder when the pipe valve is raised; A lower valve hole formed at a lower outer circumference of the cylindrical surface of the pipe valve, the pipe valve being blocked by the lower guide cylinder when the pipe valve descends, and exposed to the space in the casing when the pipe valve is raised; A blocking wall that blocks the middle of the pipe valve so that the upper and lower valve holes are disconnected from each other and partitions the upper and lower valve holes up and down; And a wax type thermostat operable to lower the pipe valve when the cooling water temperature is high and to raise the pipe valve when the cooling water temperature is low. The method of claim 1, The wax-type thermostat is a rod that descends and rises in conjunction with the expansion and contraction of the wax body contained in the wax pellet, and the rod is in the state in which the rod descends to the maximum, and the rod is exposed in the casing. A rod supporting jaw protruding outward from a pipe-type valve to support a lower end of the pipe; Cooling water temperature control device comprising a; spring for applying a force in the direction of always raising the pipe-type valve. The method of claim 2, The spring is a cooling water temperature control device, characterized in that the upper end is fixed to the upper guide cylindrical portion of the upper side, the lower end is a tension spring fixed to the rod supporting jaw. The method of claim 1, The spring is a cooling water temperature control device, characterized in that the lower end is fixed to the lower portion of the casing and the upper end is a compression spring to the elastic support rod. The method of claim 1, And a plurality of the upper and lower valve holes are formed on the outer circumferential surface of the pipe valve.