JPH0718338B2 - Coolant injection method and device - Google Patents

Description

The present invention relates to a method and an apparatus for injecting a cooling liquid into a radiator, and more specifically, when injecting a cooling liquid into a radiator body and a reserve tank, first, the air inside the radiator body is sucked. A certain amount of cooling liquid is injected into the reserve tank together with the cooling liquid, and then the cooling liquid is injected into the radiator main body that has become a negative pressure to fill the inside of the radiator main body with the cooling liquid. The present invention relates to a cooling liquid injecting method and device that allows a predetermined amount of cooling liquid to be injected into a radiator body and a reserve tank in a short time without waste, and the injection work can be easily performed.

Generally, when a liquid is filled in a sealed container, air in the container is previously sucked in order to shorten the injection time,
A method of injecting a predetermined amount of liquid after making the inside of the container into a negative pressure state is adopted.

The above injection method is also applied when injecting a cooling liquid into a radiator attached to an automobile engine, and various injection devices for that purpose have been developed (for example, Japanese Patent Publication No. 53-45867). reference).

The radiator is composed of a radiator main body and a reserve tank connected to a conduit provided on the side of the inlet of the radiator main body via an overflow tube.
In this case, since the reserve tank is made of synthetic resin and therefore has a low withstand pressure, it is substantially impossible to make the inside of the reserve tank negative.
Therefore, when injecting the cooling liquid into the radiator constituted by the radiator main body and the reserve tank, a nozzle for injecting the cooling liquid into the radiator main body and a tube for injecting the cooling liquid into the reserve tank are individually provided, respectively. The cooling liquid is injected by an independent injection device, or the cooling liquid flow path is switched to inject the cooling liquid into the radiator main body and the reserve tank, respectively.

However, in order to individually inject the cooling liquid into the radiator body and the reserve tank as described above, not only a dedicated setting device or the like is required respectively, but also the injection amount of the cooling liquid is different between the radiator body and the reserve tank. Need to be managed separately.

That is, due to the structure of the radiator body, the capacity of the radiator body tends to vary with the cooling liquid. The radiator body is generally filled with a cooling liquid. Therefore, the radiator body needs a means for preventing overflow, and the reserve tank is provided with a control means for injecting a predetermined amount of cooling liquid. For this reason, the device for injecting the cooling liquid into the radiator is complicated in terms of its mechanism, and it is very difficult to control the injection amount of the cooling liquid.

The present invention has been made to overcome the above-mentioned inconvenience, and is defined in a radiator main body and a reserve tank that is communicated from a pipeline provided on the side of the inlet of the radiator main body through an overflow tube. When injecting a certain amount of cooling liquid, first, the air inside the radiator main body is sucked to make the inside of the radiator main body negative pressure, and at the same time, a predetermined amount of cooling liquid is pre-injected into the reserve tank through the overflow tube. , Next, by filling the radiator main body with a negative pressure with the cooling liquid to the full, and then refilling the remaining cooling liquid into the reserve tank via the overflow tube again, the capacity of the radiator main body is trapped. A method for injecting a cooling liquid that enables the radiator body to be filled with the cooling liquid easily, reliably and without waste, and And to provide a device.

In order to achieve the above-mentioned object, the present invention constitutes a radiator from a radiator main body and a reserve tank communicating with the radiator main body, the radiator main body and the reserve tank are mounted on a vehicle, and the radiator has a specified amount of cooling. A method of injecting a liquid, wherein a predetermined pressure is applied to the reserve tank under the opening action of a first opening / closing means for opening and closing a passage of cooling liquid to be injected into the reserve tank while making the inside of the radiator body a negative pressure. The first step of injecting the cooling liquid, and the second step of stopping the negative pressure action when the negative pressure in the radiator main body reaches a predetermined pressure and opening and closing the passage of the cooling liquid injected into the radiator main body. The second step of injecting a cooling liquid into the radiator main body under the opening action of the opening / closing means, and detecting that the radiator main body is filled with the cooling liquid, the first opening Again through means, and wherein the third step of injecting a predetermined amount of cooling fluid to the reserve tank, in that it consists of.

Furthermore, the present invention comprises a radiator comprising a radiator main body and a reserve tank communicating with the radiator main body, the radiator main body and the reserve tank are mounted on a vehicle, and an injection for injecting a prescribed amount of cooling liquid into the radiator. A device for connecting the inside of the radiator main body to a port connected to a means for sucking air inside the radiator main body, and a first opening / closing passage for cooling liquid to be injected into the reserve tank. An opening / closing means, a second opening / closing means for opening / closing a passage for the cooling liquid to be injected into the radiator body, an injection portion that engages with an injection port formed in the radiator body, and a cooling liquid inside the radiator body. And a detection unit that detects that the condition is satisfied.

Next, a cooling liquid injection method according to the present invention will be described in detail below with reference to the accompanying drawings, with reference to preferred embodiments in relation to an apparatus for performing the same.

In FIG. 1, reference numeral 10 indicates a cooling liquid injection device according to the present invention, and the injection device 10 has a nozzle main body portion 12, and the nozzle main body portion 12 selects a cooling liquid for a reserve tank. Including a valve body for selectively switching injection
Piston part 14 and injection part 16 connected to the radiator body and the reserve tank for injecting cooling liquid into each
And a second piston portion 18 for selectively switching the injection of the cooling liquid into the inside of the radiator body. The nozzle main body 12 has a substantially central portion at the center thereof.
A hole portion (20) penetrating from one end portion of 12 toward the other end portion is formed. In fact, the hole 20 communicates with a chamber 22 defined on one end side of the nozzle body 12 and having a large diameter portion and a small diameter portion, and a chamber 24 defined on the other end side.

The chamber 24 communicates with one end of the passage 26,
The other end of is bent and communicates with the port 28. A passage 30 is provided in the nozzle body 12 so as to extend in a direction orthogonal to the hole 20, and one end of the passage 30 has a port 32.
It is in communication with. The other end of the passage 30 communicates with the hole 20. A fitting hole 34 into which the first piston portion 14 is fitted is defined at one side of the nozzle body 12. The fitting hole 34 has recesses 36a, 36b, 36 having different diameters.
A passage 38 communicates with a part of the peripheral surface formed by c and forms the recess 36b, and the passage 38 is in communication with the outside through a port 40. At the same time, a passage 42 is defined in a part of the peripheral surface forming the recess 36a, and the passage 42 communicates with the chamber 22.

The valve body accommodating member 39 that constitutes the first piston portion 14 is fitted in the fitting hole 34. The valve body accommodating member 39 has an outer shape having a plurality of steps corresponding to the shape of the fitting hole 34, and a chamber 41 having a large diameter portion and a small diameter portion is formed therein. In this case, a hole 43 is bored on one end side of the valve body accommodating member 39 forming the small diameter part of the chamber 41, whereby the passage 30 and the chamber 41 are communicated with each other and the valve body accommodating member is accommodated. Holes 39a and 39b are formed in the peripheral wall surface of the member 39 so as to correspond to the passages 38 and 42.

Next, the first piston 44 is disposed in the chamber 41. That is, one end of the piston rod of the first piston 44 is slidably fitted in the small diameter portion of the chamber 41, and the tip end portion thereof has a tapered small diameter so that the hole portion 43 can be opened and closed. It constitutes the body 44a. Meanwhile, the first piston 4
A large-diameter flange portion is formed on the other end side of 4 and substantially constitutes the piston body. An outer peripheral wall surface of the flange portion slidably contacts an inner peripheral wall surface of the chamber 41, and a coil spring is attached to the flange portion of the first piston 44.
One end of 46 is pressed. In this case, the other end of the coil spring 46 engages with the lid member 48 that engages with the fitting hole 34 so as to close the chamber 41. Therefore, the first piston 44 is moved by the arrow A under the pressing action of the coil spring 46.
It will be easily understood that the hole 43 is pushed in the direction and is closed by the valve element 44a.

On the other hand, a sleeve 50 forming the injection part 16 is fitted in the chamber 22 formed at one end side of the nozzle body 12.
In this case, the sleeve 50 has a first cylindrical portion 50a fitted to the small diameter portion of the chamber 22, a second cylindrical portion 50b fitted to the large diameter portion of the chamber 22, a flange portion 50c, and the flange. A third cylindrical portion 50d extending from the portion 50c, a screw portion 50e having a smaller diameter than the third cylindrical portion 50d, and a fourth cylindrical portion 50f below the screw portion 50e. There is. The screw part 5
A nut member 52 forming the injection portion 16 is screwed into 0e. A circumferential recess is formed in the nut member 52, and a ring-shaped seal member 54 is engaged with the recess.

Next, a seal member 56 is fitted onto the tip of the cylindrical portion 50f that constitutes the sleeve 50, and the seal member 56 is attached to the radiator 60.
Engages with the inlet 64 formed in the radiator body 62.
In this case, a peripheral groove 66 is defined by the end surface of the seal member 56, and the peripheral groove 66 communicates with a reserve tank described later through a pipe line 68 and an overflow tube 70 that are in communication with the inlet 64. is doing. Further, the sleeve 50 is provided with a plurality of holes 72 for communicating the chamber 22 with the circumferential groove 66. A hole 74 is formed in the first cylindrical portion 50a so as to extend in the axial direction. The hole 74
Is substantially coaxial with and has the same diameter as the hole 20 formed in the nozzle body 12, and inside the hole 20 and the hole 74, the piston rod 75 of the second piston part 18 is formed. The valve body 76 formed at the tip is fitted. In fact, the valve body
76 is in sliding contact with the inner peripheral wall portion of the cylindrical portion 50f. The middle portion of the piston rod 75 once has a small diameter and extends inside the hole 74, and again has a large diameter to face the inside of the chamber 24 formed in the nozzle body 12. Inside the chamber 24, the piston rod 75 is integrated with the piston 76a. An O-ring 78 is engaged with the outer peripheral wall surface of the piston 76a. That is,
It will be readily appreciated that chamber 24 is separated by piston 76a into chamber 24a and chamber 24b. Further, a piston rod 77 extending from the other end side of the piston 76a is fitted into a hole 80 of a joint member 79 which projects from the nozzle body 12 and forms the second piston portion 18. A port 82 is formed at the tip of the hole 80 of the joint member 79, and a passage 83 is provided near the port 82. A pressure sensor 85 is provided in the joint member 79 so as to face the passage 83.
Is provided.

A flange portion 79a is formed on the joint member 79, and a port 84 is defined on the outer peripheral wall surface of the flange portion 79a. The port 84 communicates with the chamber 24b via a passage 86.

In the figure, reference numeral 76b indicates a suction passage which penetrates the piston rods 75 and 77 and communicates with the port 82. Also,
Reference numeral 89 indicates an O-ring arranged at each portion in order to prevent leakage of cooling liquid, air and the like.

The injection device for carrying out the cooling liquid injection method according to the present invention is basically constructed as described above. Next, the piping system and control system thereof will be described.

In FIG. 2, reference numeral 90 indicates a tank which stores the cooling liquid to be injected, and the suction pipe line 94 of the pump 92 for feeding the cooling liquid faces the inside of the tank 90. One end of a conduit 96 is connected to the discharge side of the pump 92, and the conduit 96
The other end side of is connected to the suction side of the constant-volume discharge device 98. Further, the discharge side of the constant quantity discharge device 98 communicates with the port 32 formed in the cooling liquid injection device 10 according to the present invention by the pipe line 100. The injection device 10 communicates with the reserve tank 102 constituting the radiator 60 via the overflow tube 70, and the port 82 of the injection device 10 has a conduit 104.
Is connected to one end side, and the other end side of the pipeline 104 is connected to the switching valve 106.
Connected to. Further, the switching valve 106 communicates with a vacuum pump 110 via a pipe line 108. The pipeline 108 is branched on the way and connected to the pressure gauge 114. In this case, the valve devices 44a and 76, the pressure sensor 85, and the switching valve 106 incorporated in the constant quantity discharge device 98 and the injection device 10 are controlled by the control device 116.

Next, the operation and effect of the present invention will be described.

First, as shown in FIG. 1, the injection part 16 of the injection device 10 is engaged with the radiator main body 62. That is, the seal member 54 that constitutes the injection part 16 is fitted into the injection port 64 of the radiator body 62, and is also attached to the nut member 52.
Is closely attached to the upper surface of the inlet 64. In this case, the position of the seal member 54 can be adjusted corresponding to the inlet 64 by screwing the nut member 52.

Therefore, as shown in FIG. 3, the air inside the radiator main body 62 is sucked and a predetermined amount of cooling liquid is injected into the reserve tank 102. That is, the vacuum pump 110 and the switching valve 1
By operating 06, the air existing inside the radiator main body 62 is sucked from the suction passage 76b through the port 82. At the same time, the pump 92 and the constant amount discharge device 98 are operated to supply the cooling liquid to the injection device 10. At that time, the pressure fluid for driving the first piston 44 is supplied to the chamber 41 from the port 40. As a result, the first piston 44 moves in the direction of arrow B against the pressing force of the coil spring 46 to connect the hole 43 and the passage 42. Therefore, the cooling liquid supplied from the port 32 has the passage 30, the hole 43, the passage 42, the chamber 22, and the hole.
It is supplied to the reserve tank 102 via the 72, the peripheral groove 66, the pipe line 68 and the overflow tube 70.

When a predetermined amount (in this case, the minimum specified amount of the reserve tank is desirable) of cooling liquid is supplied to the reserve tank,
The supply of pressure fluid to the port 40 is stopped, and the first piston 44
Closes the hole 43 under the pressing action of the coil spring 46. On the other hand, the suction of the air inside the radiator main body 62 is further continuously performed, and this is continued until a predetermined negative pressure is reached. At this time, it can be easily understood from FIG. 3 that the constant-volume dispensing device 98 is inactive.

Next, when the pressure inside the radiator main body 62 reaches a predetermined negative pressure, the switching valve 106 is deenergized and the evacuation is stopped. At about the same time, the work of injecting the cooling liquid into the radiator main body 62 is performed. That is, the metering device 98 is actuated, and the pilot pressure fluid is supplied to the chamber 24b through the port 84 of the injecting device 10, thereby causing the piston 76a.
Is displaced downward in the figure. That is, the valve body 76
Is displaced to the position shown by the chain double-dashed line in FIG. Due to the displacement of the valve body 76, the cooling liquid supplied from the constant quantity discharge device 98 to the port 32 is supplied into the radiator main body 62 through the passage 30 and the hole 20. At this time, the change of the internal pressure in the radiator main body 62 is changed by the pressure sensor 8 through the suction passage 76b.
Detected by 5. Then, when the pressure sensor 85 detects that the radiator body 62 is sufficiently supplied with the cooling liquid, the signal is sent to the control device 116, which again causes the pressure fluid to flow into the chamber 41 via the port 40 and the passage 38 to the chamber 41. Is supplied, the first piston 44 moves in the direction of arrow B in the same manner as described above, and the coolant is supplied to the reserve tank. In this case, when it is detected that the cooling liquid of the radiator main body 62 is sufficient, the supply of the pilot pressure fluid to the chamber 24b is stopped at the same time, and the pilot pressure fluid is supplied to the chamber 24a via the port 28 and the passage 26. Supplied. As a result, the piston 76a is displaced, the valve body 76 returns to the position shown by the solid line in FIG. 1, and the supply of the cooling liquid to the radiator main body 62 is stopped. Then, when a specified amount of the cooling liquid is injected into the reserve tank 102, the supply of the pilot pressure fluid to the port 40 is stopped, and at the same time, the fixed amount discharge device 98 is deenergized and the cooling liquid is injected into the radiator 60. Is completed.

As described above, according to this embodiment, the air inside the radiator main body 62 is sucked and the cooling liquid is injected into the reserve tank 102, and then the inside of the radiator main body 62 becomes a predetermined negative pressure, Coolant is injected into the radiator body 62. Further, when the radiator main body 62 is sufficiently filled with the cooling liquid, the cooling liquid is injected into the reserve tank 102 again. For this reason, the radiator body 62
It is possible to inject a predetermined amount of cooling liquid into the radiator main body 62 and the reserve tank 102 without being affected by the variation in the capacity of the. Further, as the injection device, since it is possible to inject into both the radiator main body 62 and the reserve tank 102 only with the injection device 10 according to the present invention,
The injection amount can be controlled accurately and easily.

Next, another embodiment of the apparatus for carrying out the cooling liquid injection method according to the present invention will be described. In this case, in FIG. 4, the same reference numerals as those in FIG. 1 indicate the same components, and therefore detailed description thereof will be omitted.

In the first embodiment, the pressure sensor 85 is used as a means for detecting the injection amount of the cooling liquid in the radiator main body 62. However, in this embodiment, as shown in FIGS. A non-return valve inside the injection part 16 that constitutes the device 10.
118 are arranged. That is, one of the plurality of holes 72 formed in the sleeve 50 that constitutes the injection part 16
The two holes are made large in diameter to provide the chamber 72a, and the sealing member 56 is provided with the hole 120 coaxially with the chamber 72a. As a result, the circumferential groove 66 and the inside of the radiator main body 62 are in communication with each other. Then, one end side of the valve body 122 constituting the check valve 118 is loosely fitted in the chamber 72a. The other end side of the valve body 122 projects toward the circumferential groove 66 side, and a hemispherical head portion 122a is formed at the tip end portion thereof. In this case, the head portion 122a faces the hole portion 120 formed in the seal member 56. Further, a coil spring 124 is disposed in the chamber 72a, and the coil spring 124
One end side of the valve body abuts on an end surface portion of the chamber 72a, and the other end side of the valve body 122 is externally fitted to the head portion 122b of the valve body 122. Therefore, the valve body 122 closes the hole 120 formed in the seal member 56 under the pressing action of the coil spring 124.

The radiator is constructed by the injection device 10 configured as described above.
The operation of injecting the cooling liquid into 60 will be described.

First, by the same operation as in the first embodiment, the air inside the radiator main body 62 is sucked, and the reserve tank 10
A predetermined amount of cooling liquid is supplied to 2, and after the suction of the air in the radiator main body 62 is completed, the cooling liquid is supplied into the radiator main body 62. In this case, it goes without saying that the injection of the cooling liquid into the reserve tank 102 is once stopped. Then, when the cooling liquid is sufficiently injected into the radiator main body 62 and further the cooling liquid is injected into the radiator main body 62, the cooling liquid overflows and reaches the inside of the hole 120. As a result, the valve body 122 closing the hole 120 by the hydraulic pressure of the cooling liquid is displaced against the pressing force of the coil spring 124, and the hole 120 and the circumferential groove 66 are in communication with each other, Eventually, the overflowed cooling liquid flows from the circumferential groove 66 to the reserve tank 10 through the pipe 68 and the overflow tube 70.
Injected into 2. When a specified amount of the cooling liquid is injected into the reserve tank 102 in this way, the valve body 76 is restored by the same operation as in the first embodiment, and the operation of injecting the cooling liquid into the radiator 60 is completed.

As described above, according to the present embodiment, as in the first embodiment, it is possible to inject a predetermined amount of cooling liquid into the radiator main body 62 and the reserve tank 102. Although the effect is also substantially the same as that of the first embodiment, according to the present embodiment, since the overflow detection means is mechanically performed by the check valve, the configuration of the control device 116 is simplified. The advantage that it can be obtained is also obtained.

As described above, according to the present invention, when injecting the cooling liquid into the radiator configured by the radiator main body and the reserve tank, first, while sucking the air in the radiator main body, a predetermined amount of the cooling liquid is stored in the reserve tank. Then, a cooling liquid is injected into the radiator main body to sufficiently fill the radiator main body, and the excess cooling liquid is injected into the reserve tank again. In this case, the operation is performed by a single injection device. Therefore, it is possible to inject the cooling liquid into the radiator main body and the reserve tank with one nozzle, and the radiator main body is filled with the cooling liquid without waste regardless of the variation in the capacity of the radiator main body. It is also possible to inject a specified amount of cooling liquid into the reserve tank. Further, the injection amount of the radiator liquid can be controlled very easily, and the injection device itself is a single unit, so that the entire device can be simplified.

Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the scope of the present invention. Of course.

[Brief description of drawings]

FIG. 1 is a partially omitted vertical sectional view showing a cooling liquid injecting device according to the present invention, FIG. 2 is a connection explanatory view of a cooling liquid injecting device according to the present invention, and FIG. 3 is a cooling liquid according to the present invention. 4 is a time chart for explaining the method for injecting the cooling liquid, FIG. 4 is a partially omitted vertical sectional view showing another embodiment of the cooling liquid injecting device according to the present invention, and FIG. 5 is the cooling liquid injecting device shown in FIG. FIG. 3 is a connection explanatory diagram of 10 …… Injection device, 12 …… Nozzle body 14,18 …… Piston, 22,24 …… Room 44 …… Piston, 46 …… Coil spring 50 …… Sleeve, 54,56 …… Seal member 60… … Radiator, 62 …… Radiator body 70 …… Overflow tube 76 …… Valve element, 102 …… Reserve tank

Claims (7)

[Claims] 1. A method of forming a radiator from a radiator main body and a reserve tank communicating with the radiator main body, wherein the radiator main body and the reserve tank are mounted on a vehicle, and a prescribed amount of cooling liquid is injected into the radiator. First, injecting a predetermined amount of the cooling liquid into the reserve tank under the opening action of the first opening / closing means that makes the inside of the radiator body a negative pressure and opens / closes a passage of the cooling liquid injected into the reserve tank And the opening operation of the second opening / closing means for stopping the negative pressure action when the negative pressure in the radiator body reaches a predetermined pressure and opening and closing the passage of the cooling liquid injected into the radiator body. The second step of injecting a cooling liquid into the radiator main body and the fact that the radiator main body is filled with the cooling liquid are detected, and the re-opening is performed again via the first opening / closing means. The third step and the injection method of cooling liquid, characterized in that it consists of injecting a predetermined amount of cooling fluid to Butanku. 2. A radiator comprising a radiator main body and a reserve tank communicating with the radiator main body, the radiator main body and the reserve tank being mounted on a vehicle, and a pouring device for injecting a prescribed amount of cooling liquid into the radiator. And a first body for opening and closing a pipe body that communicates the inside of the radiator body with a port to which a unit for sucking air in the radiator body is connected, and a passage for cooling liquid to be injected into the reserve tank. Means, a second opening / closing means for opening / closing a passage for cooling liquid to be injected into the radiator main body, an injection portion that engages with an injection port formed in the radiator main body, and the radiator main body is filled with the cooling liquid. A cooling liquid injection device, comprising: a detection unit that detects that the cooling liquid has been injected. 3. The apparatus according to claim 2, wherein an injection portion that engages with an injection port formed in the radiator body is provided at a sleeve member that is fitted on the second opening / closing means and at a tip portion of the sleeve member. And a second seal member which is mounted substantially at the center of the sleeve member via a nut member and which is substantially engaged with the inlet of the radiator. Injection device. 4. The apparatus according to claim 2 or 3, wherein a second passage is provided for opening and closing a passage for cooling liquid injected into the radiator body.
The opening / closing means includes a piston that reciprocates due to the fluid pressure of the pilot pressure fluid, and a valve body that is displaced as the piston moves and that closes the passage and the inside of the radiator body to communicate with each other. . 5. The apparatus according to any one of claims 2 to 4, wherein the first opening / closing means for opening / closing the passage of the cooling liquid injected into the reserve tank opens the passage under the pressing action of the elastic body. A cooling fluid injection device comprising a piston that is closed and that is opened by the fluid pressure of a pilot pressure fluid, and a valve element that is provided at the tip of the rod of the piston. 6. The apparatus according to claim 2, wherein the means for detecting that the radiator body is filled with a cooling liquid is connected to a port communicating with the radiator body. The cooling liquid injection device is a sensor for detecting the pressure inside the radiator body. 7. The apparatus according to claim 2, wherein the means for detecting that the radiator main body is filled with the cooling liquid is engaged with an injection port formed in the radiator main body. A cooling liquid injection device, which is a non-return valve provided inside the injection part that operates by the hydraulic pressure of the cooling liquid.