JPH0932554A - Radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation and damaged collapse of a radiator constituting part by installing an instantaneously pressure reducing tool having the constitution whose volume increases when deformation starts in a condition where internal pressure of an upper tank is almost equal to working pressure of a safety valve and which is restored to an original shape in a condition where its internal pressure becomes lower than working pressure of the safety valve. SOLUTION: An instantaneously pressure reducing tool B1 is formed in a bottomed cylinder body shape, and is molded by an elastic material such as synthetic rubber so as to be instantly restored to an original shape when its cause is removed even if deformation increasing its volume is applied by any cause. In this instantaneously pressure reducing tool B1 , a flange part 38 on its opening side is brought into close contact with a ring part of an installing ring 27, and is installed in an upper part of an upper tank 1. When internal pressure of the upper tank 1 is going to suddenly increase, since this internal pressure becomes almost equal to working pressure of a safety valve A, the instantaneously pressure reducing tool B1 instantly starts deformation, and its volume suddenly increases.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator used for cooling an automobile engine or the like.

[0002]

2. Description of the Related Art The structure of a radiator R is shown in FIGS. 1 and 7 to 10. In FIG. 7, engine E
The heated cooling water L ₁ heated by is stirred by the water pump 7. When the liquid temperature of the heating / cooling water L ₁ rises and exceeds the set value of the thermostat 8, the thermostat 8
Is activated, the outlet 10 is opened, and the heating / cooling water L ₁ flows into the upper tank 1 of the radiator R through the upper hose 5. The heated cooling water L ₁ flowing into the upper tank 1 passes through a large number of cooling pipes 3 provided below it and is collected in the lower tank 2. As shown in FIG. 8, the cross section of each cooling pipe 3 has a vertically long and slender flat shape, and the side faces of the cooling pipes 3 are attached to the heat radiation fins 4 so as to increase the cooling efficiency. . The heating / cooling water L ₁ passes through a large number of cooling pipes 3,
The heat is taken by the radiation fins 4 and cooled. further,
Since cooling air is sent to the radiating fins 4 by the fan 11, the heat taken by the radiating fins 4 from the heated cooling water L ₁ is released to the outside of the radiator R, and the cooling efficiency is further enhanced.

Next, the structure of the safety valve A will be described. As shown in FIG. 1, when the liquid temperature heating and cooling water L ₁ in the engine E increases, also increases the liquid temperature heating and cooling water L ₁ of the upper tank 1, at the same time also increases the internal pressure P. A safety valve A is provided on the upper surface of the upper tank 1 for controlling the internal pressure P when the internal pressure P of the upper tank 1 changes. The safety valve A has its main body 2
2, an overflow pipe 13 is projected outward, and the overflow pipe 13 is attached to the cooling water L in the reserve tank 14 provided outside the radiator R,
It is always inserted in a liquid-immersed state. As shown in FIG. 9, when the liquid temperature of the heating / cooling water L _{1 in} the upper tank 1 rises, and as a result, the internal pressure P of the upper tank 1 rises, the force F for lifting the rod 21 upward from below the safety valve A is generated. work. When the force F becomes larger than the force with which the pressure adjusting valve 17 is pushed down by the external spring 19, the rod 21 causes the pressure adjusting valve 17 to pass through the negative pressure valve 18.
Push up. Therefore, a gap e is formed between the main body 22 and the pressure regulating valve 17. The internal pressure P of the upper tank 1 is
Larger than the internal pressure P ₁ of the reserve tank 14, heating and cooling water L ₁ of the upper tank 1 passes through the gap e from the adjustment hole 23 and flows into the reserve tank 14 through an overflow pipe 13. Internal pressure P of upper tank 1
However, when the pressure is balanced with the internal pressure P ₁ of the reserve tank 14, the compression force of the external spring 19 becomes larger than the force F, and the pressure regulating valve 17 is pressed against the main body 22.
Is closed and the outflow of the heating / cooling water L ₁ is stopped.

On the contrary, when the internal pressure P of the upper tank 1 is lower than the internal pressure (atmospheric pressure) P ₁ of the reserve tank 14, as shown in FIG. 10, the cooling water L accumulated in the reserve tank 14 is stored. Flow into the main body 22 of the safety valve A through the overflow pipe 13. The cooling water L
Pushes the rod 21 downward from above through the return hole 24 provided in the casing 25. When the force F ′ that pushes down the rod 21 becomes larger than the compression force of the internal spring 20, a gap e ′ is formed between the pressure regulating valve 17 and the negative pressure valve 18.
Occurs. Since the internal pressure P ₁ of the reserve tank 14 is higher than the internal pressure P of the upper tank 1, the reserve tank 14
The cooling water L therein flows from the return hole 24 into the upper tank 1 through the gap e ′. When the internal pressure P ₁ of the reserve tank 14 is balanced with the internal pressure P of the upper tank 1, the compression force of the internal spring 20 becomes larger than the force F ′,
Since the negative pressure valve 18 is pressed against the pressure adjusting valve 17, the gap e ′ is closed and the inflow of the cooling water L is stopped.

When the liquid temperature of the heating / cooling water L _{1 in} the upper tank 1 gradually rises, that is, when the internal pressure P of the upper tank 1 gradually rises, the pressure regulating valve 17 of the safety valve A operates. The internal pressure P of the upper tank 1 is kept appropriate. However, the pressure regulating valve 17 has the external spring 19
If the responsiveness is poor because it is operating in the above condition, and if overheating occurs, or if large bubbles flow from the engine E into the upper tank 1 due to damage to the gasket, etc., and the internal pressure P of the upper tank 1 rises sharply. Often do not operate instantly. In such a case, the internal pressure P of the abruptly increased upper tank 1 reaches the heated cooling water L ₁ in each cooling pipe 3, and as shown in FIG. 11, the cooling pipe 3 has a circular cross section 3a. It was transformed into a slab and could be damaged or destroyed in extreme cases. In addition, the upper tank 1 may be deformed due to a rapid increase in the internal pressure P, which renders the radiator R unusable.

[0006]

SUMMARY OF THE INVENTION According to the present invention, when the internal pressure of the upper tank suddenly rises for some reason and the safety valve having a spring structure does not operate instantaneously, the internal pressure of the safety valve is instantly reduced to reduce the safety valve. It is an object of the invention to prevent deformation or damage of the components of the radiator by operating the radiator normally.

[0007]

In order to solve this problem, the means adopted by the present invention is that a plurality of cooling pipes are provided in the upper tank and the lower tank which are arranged at a predetermined interval in the vertical direction. A safety valve using a compression spring is attached to the upper tank, and the heated cooling water that has cooled the object to be cooled and has flowed into the upper tank is radiated and circulated while passing through the cooling pipe. , When the internal pressure of the upper tank exceeds the operating pressure, the safety valve is actuated, and in the radiator configured to reduce this pressure, the deformation starts when the internal pressure of the upper tank is almost equal to the operating pressure of the safety valve. Then, as the volume increases, the instantaneous decompression device configured to restore the original shape in a state where the internal pressure is lower than the operating pressure of the safety valve. Either or both of the Patanku or lower tank is that attached to communicated with the.

When the internal pressure of the upper tank is suddenly increased due to the above-mentioned reasons, this internal pressure becomes almost equal to the operating pressure of the safety valve, so that the instantaneous decompressor instantaneously deforms. Beginning, its volume is rapidly increased. As a result, a sudden increase in the internal pressure of the upper tank is suppressed, and when the internal pressure of the upper tank that is approximately equal to or slightly higher than the operating pressure of the upper tank acts on the safety valve for a predetermined time, the safety valve operates and the upper tank is activated. At the same time that the internal pressure of the device decreases, the instantaneous decompressor whose volume has remarkably increased returns to its original shape. Due to the action of the instant decompressor, the safety valve normally functions and the deformation or damage of the components of the radiator is prevented. On the other hand, when the internal pressure of the upper tank gradually rises, this internal pressure becomes almost the same as the operating pressure of the safety valve, so the instantaneous decompression device starts to deform, but compared with the case where this internal pressure rises sharply. As a result, the increase in volume is extremely small. As a result, when the internal pressure of the upper tank becomes almost equal to the operating pressure of the safety valve with the volume of the instantaneous decompressor slightly increased, the safety valve operates and the internal pressure of the upper tank sharply decreases.
The instantaneous decompressor, which had slightly increased in volume, will also be restored to its original shape, and the radiator will be safe.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples. FIG. 1 is a front view in which an upper portion of a radiator R according to the present invention is cut away, and FIGS.
Various instantaneous decompression device B ₂ .about.B ₆ constituting the radiator R in accordance with the present invention. FIG. FIG. 7: is a figure which shows the structure of the conventional radiator. FIG. 8 is a sectional view taken along line XX of FIG. 9 and 10 are sectional views of the safety valve A in different states. FIG. 11 is a partially enlarged cross-sectional view showing a damaged state of the cooling pipe 3.

As shown in FIGS. 1 and 8, the radiator R has an upper tank 1 and a lower tank 2 arranged at a predetermined interval in the vertical direction, and a plurality of flat cooling pipes 3 are connected between them. Then, both side surfaces of each cooling pipe 3 are attached to the heat radiation fins 4. A safety valve A using a compression spring is attached to the upper plate portion 1a of the upper tank 1, and an overflow pipe 13 projecting from a main body 22 of the safety valve A is provided in a reserve tank 14 provided outside the radiator R. To
It is always inserted in a liquid-immersed state. Further, a communication hole 26 having a predetermined size is provided in the upper plate portion 1a of the upper tank 1, and the ring portion of the attachment ring 27 is attached to the inner peripheral surface of the communication hole 26 from above the communication hole 26. It is desirable to perform a process such as soldering 30 around the flange portion of the mounting ring 27 so that no gap is created between the mounting ring 27 and the upper tank 1. Instantaneous decompressor B
₁ has a cylindrical shape with a bottom, for some reason,
Even if it receives deformation that increases its volume, it is molded from an elastic material such as synthetic rubber so as to instantly restore its original shape if the cause is removed. This instantaneous decompressor B ₁ has a flange on the opening side thereof. The portion 38 is closely attached to the ring portion of the attachment ring 27 and is attached to the upper portion of the upper tank 1. In order to further improve the adhesion between the flange portion 38 of the instantaneous decompressor B ₁ and the mounting ring 27, the pressing ring 28 is arranged above the flange portion 38, and the pressing ring 28 and the mounting ring 27 are arranged. It suffices to screw the and with the plurality of screws 29 to sandwich the flange portion 38 of the instantaneous decompressor B ₁ between the pressing ring 28 and the mounting ring 27.

When the internal pressure of the upper tank 1 suddenly rises due to the above reasons, this internal pressure becomes almost equal to the operating pressure of the safety valve A, and the instantaneous decompressor B ₁ starts to deform instantly, and its volume is rapidly increased as shown by the chain double-dashed line in FIG. As a result, a sudden increase in the internal pressure of the upper tank 1 is suppressed, and when the internal pressure of the upper tank 1 which is equal to or slightly higher than the operating pressure of the upper tank 1 acts on the safety valve A for a predetermined time, the safety valve A is activated. Then, at the same time as the internal pressure of the upper tank 1 is reduced, the instantaneous decompressor B ₁ whose volume has been remarkably increased and largely deformed is restored to its original shape. In this way, when the safety valve A operates, as shown in FIG. 9, a gap e is formed between the pressure regulating valve 17 and the main body 22, and the heating cooling water L ₁ passes through the gap e.
Flows into the reserve tank 14, the internal pressure P ′ of the upper tank 1 drops to the internal pressure P. Due to the action of the instant decompressor B ₁ , the safety valve A functions normally and deformation or damage of the components of the radiator R is prevented.

On the other hand, when the internal pressure of the upper tank 1 gradually rises, this internal pressure becomes almost equal to the operating pressure of the safety valve A, so that the instantaneous decompressor B ₁ begins to deform, but this internal pressure The increase in volume is significantly smaller than the case in which the temperature rises rapidly. As a result, when the internal pressure of the upper tank 1 becomes substantially equal to the operating pressure of the safety valve A with the volume of the instantaneous decompressor B ₁ slightly increased, the safety valve A operates and the internal pressure of the upper tank 1 rapidly increases. At the same time, the volume of the decompressor B ₁ which had slightly increased in volume is restored to its original shape, and the safety of the radiator is ensured. The instantaneous decompressor B ₁ shown in FIG. 1 is an example of the instantaneous decompressor constituting the present invention, and various other examples are shown in FIGS. 2 to 6.

In the instant decompressor B ₂ shown in FIG. 2, a communication hole 26 having a predetermined size is provided in the upper plate portion 1a of the upper tank 1 so that the communication hole 26 and the mounting ring 27a communicate with each other. The mounting ring 27a is mounted on the upper plate 1a of the upper tank 1. Also in this example, it is desirable to apply a process such as soldering 30 to the periphery of the flange portion of the mounting ring 27a so that a gap is not formed between the peripheral edge of the flange portion and the upper plate portion 1a of the upper tank 1. .. The opening side portion of the instantaneous decompressor B ₂ having substantially the same structure as the instantaneous decompressor B ₁ is fitted to the outside of the ring portion of the mounting ring 27 a, and this portion is tightened and fixed by the hose band 31. As described above, the bottomed cylindrical instantaneous decompressor B ₂ can be attached to the attachment ring 27a without a gap.

Still another instant decompressor B ₃ will be described with reference to FIG. An opening side portion of a bellows-shaped instantaneous decompressor B ₃ formed of an elastic material such as synthetic rubber is fixed to the peripheral edge portion of the communication hole 26 provided in the upper plate portion 1a of the upper tank 1. As the internal pressure P of the upper tank 1 rises, the bellows-shaped instantaneous decompressor B ₃ that has contracted greatly expands upward and its volume increases, thereby reducing the internal pressure P of the upper tank 1.

Still another instant decompressor B ₄ will be described with reference to FIG. A communication hole 26 is provided in the upper plate 1a of the upper tank 1, and a mounting plate 39 provided at the base end of the instantaneous decompressor B ₄ is fixed to the upper plate 1a so as to cover the communication hole 26. Communication hole 26 provided in the upper plate portion 1a
And the hole of the pipe portion 39a which is erected at the center of the mounting plate 39 of the instantaneous decompressor B ₄ communicates with each other. The instant decompressor B ₄ has a structure in which the Bourdon tube 32 has a double filament shape in order to maximize the ratio of the total volume to the occupied portion. The tip 33 of the Bourdon tube 32 is
Keep it closed. As the internal pressure P of the upper tank 1 rises,
Since the cross section of the flat Bourdon tube 32 approaches a circular shape and the volume increases, the instantaneous decompressor B ₄ reduces the internal pressure P of the upper tank 1.

Still another instant decompressor B _5, B ₆ will be described with reference to FIGS. 5 and 6, respectively. The instantaneous decompressors B _{5 and} B ₆ both use a Bourdon tube like the instantaneous decompressor B ₄ , but their overall shape is different from the instantaneous decompressor B ₄ . That is, the instantaneous decompressor B _5,
In B ₆ , the Bourdon tube is made into a spiral shape and a folded shape, respectively, so that the ratio of the total volume to the occupied portion is maximized.

The instantaneous decompressors B _{1 to} B described above are used.
₆ is just an example, the instantaneous decompression device attached to the radiator according to the present invention starts to deform in a state where the internal pressure of the upper tank is almost equal to the working pressure of the safety valve, and its volume increases. Any structure may be used as long as the internal pressure of the safety valve is restored to the original shape when the internal pressure is lower than the operating pressure of the safety valve.

In the above embodiment, the instantaneous decompressor is attached to the upper tank in a communicating state, but the instantaneous decompressor can be attached to the lower tank. However, in order to suppress the internal pressure of the upper tank that suddenly rises, it is desirable to attach the instantaneous decompressor to the upper tank. Also, regarding the attachment of the instantaneous decompressor, in order to prevent the instantaneous decompressor from largely protruding above the radiator, the instantaneous decompressor can be attached via a rubber hose instead of being directly attached to the upper tank. Further, it is possible to provide a concave part in the upper tank and attach the instant decompressor to this part, and the attaching method is completely free.

[0019]

The radiator according to the present invention begins to deform in a state where the internal pressure of the upper tank is substantially equal to the operating pressure of the safety valve, the volume thereof increases, and the internal pressure of the radiator is higher than the operating pressure of the safety valve. When an instantaneous decompressor that restores its original shape in a lowered state is connected to the upper tank and the internal pressure of the upper tank suddenly rises, elastic deformation causes the volume of the instantaneous decompressor to increase. Suddenly increases to prevent the pressure in the upper tank from rapidly increasing, so that the safety valve always functions properly. As a result,
Even if the internal pressure of the upper tank rises sharply, the components of the radiator are prevented from being deformed or damaged.

[Brief description of drawings]

FIG. 1 is a front view in which an upper portion of a radiator R according to the present invention is cut away.

FIG. 2 is a view showing an instantaneous decompressor B ₂ which constitutes a radiator R.

FIG. 3 is a view showing an instant decompression device B ₃ which constitutes a radiator R.

FIG. 4 is a view showing an instant decompression device B ₄ which constitutes a radiator R.

FIG. 5 is a view showing an instantaneous decompressor B ₅ which constitutes a radiator R.

FIG. 6 is a view showing an instantaneous decompressor B ₆ which constitutes a radiator R.

FIG. 7 is a diagram showing a structure of a conventional radiator.

8 is a sectional view taken along line XX of FIG.

FIG. 9 is a sectional view of the safety valve A in an operating state.

10 is a sectional view of the safety valve A in a state where cooling water L is returned from the reserve tank 14 to the upper tank 1. FIG.

11 is a partially enlarged cross-sectional view showing a broken state of the cooling pipe 3. FIG.

[Explanation of symbols]

A: Safety valve B _{1 to} B ₆ : Instantaneous decompressor L: Cooling water L ₁ : Heating / cooling water P: Internal pressure R: Radiator 1: Upper tank 1a: Upper tank upper plate 2: Lower tank 3: Cooling pipe 19: External Spring (compression spring)

Claims (4)

[Claims] 1. An upper tank and a lower tank, which are arranged at a predetermined interval in the vertical direction, are connected by a large number of cooling pipes, and a safety valve using a compression spring is attached to the upper tank. The heated cooling water that has cooled the cooling material and flowed into the upper tank is circulated and used while radiating heat while passing through the cooling pipe,
When the internal pressure of the upper tank exceeds the operating pressure, the safety valve is operated to reduce the pressure.In the radiator, the internal pressure of the upper tank starts to be deformed in a state substantially equal to the operating pressure of the safety valve. As its volume increases,
A radiator characterized in that an instantaneous decompressor having a structure that restores its original shape when its internal pressure is lower than the operating pressure of the safety valve is attached in communication with either or both of the upper tank and the lower tank. 2. The radiator according to claim 1, wherein the instantaneous decompressor has a bottomed cylindrical shape that is elastically deformable. 3. The radiator according to claim 1, wherein the instantaneous decompressor is made of bellows. 4. The radiator according to claim 1, wherein the instantaneous decompressor is composed of a Bourdon tube.