JPS6357813A - Liquid coolant injection method and its device - Google Patents

Abstract

PURPOSE:To enable an injection process to be carried out without any loss by letting a pressure within a radiator body be negative, simultaneously injecting a liquid coolant into a reserve tank connected to said body, thereafter injecting the liquid coolant into the body until it is full, and injecting a specified amount of the liquid coolant into the reserve tank. CONSTITUTION:The liquid coolant injection into a radiator consisting of a radiator body 62 and a reserve tank 102 connected to said body 62 via an over flow tube 70 is initiated by setting an injection device 10 to the body 62. Then, a vacuum pump 110 and a changeover valve 106 are actuated to have the body 62 subjected to vacuum evacuation, while a pump 92 and a quantitative dis charge device 98 are operated for injection of a designated amount of the liquid coolant into the reserve tank 102. When the designated negative pressure has been attained within the body 62, the vacuum evacuation is stopped, and simulta neously the liquid coolant supplied via the quantitative discharge device 98 is fed into the body 62. When the fullness of the body 62 has been detected by a pressure sensor 85, a specified quantity of the liquid coolant is injected again into the reserve tank 102.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for injecting coolant into a radiator, and more specifically, when injecting coolant into a radiator body and a reserve tank, air inside the radiator body is first sucked. At the same time, a predetermined amount of coolant is injected into the reserve tank, and then the coolant is injected into the radiator body, which has become under negative pressure, to fill the inside of the radiator body with the coolant, and then the coolant is poured into the reserve tank again. This invention relates to a method and device for injecting a coolant, which allows a predetermined amount of coolant to be injected into a radiator main body and a reserve tank in a short time without waste, and also makes it possible to easily carry out the injection work.

Generally, when filling a sealed container with liquid, the air inside the container is aspirated in advance to shorten the injection time.
A method is adopted in which a predetermined amount of liquid is injected after the inside of the container is brought into a negative pressure state.

The injection method described above is also applied when injecting coolant into a radiator attached to an automobile engine, and various injection devices for this purpose have been developed (for example,
(See Special Publication No. 53-45867).

The radiator is composed of a radiator body and a reserve tank connected to a conduit provided on the side of the inlet of the radiator body via an overflow tube.

In this case, the reserve tank is made of synthetic resin, and therefore has low pressure resistance, so it is virtually impossible to create a negative pressure inside the reserve tank.

Therefore, when injecting coolant into a radiator consisting of a radiator body and a reserve tank, a nozzle for injecting coolant into the radiator body and a tube for injecting coolant into a reserve tank are provided separately, respectively. A method is used in which the coolant is injected using an independent injection device, or by switching the flow path of the coolant to inject the coolant into the radiator body and the reserve tank, respectively.

However, in order to separately inject coolant into the radiator body and the reserve tank as described above, not only is a dedicated cent device required for each, but also the amount of coolant to be injected is determined by the radiator body and the reserve tank. It is necessary to manage it separately from the tank.

That is, due to its structure, the radiator main body tends to have a variable capacity for cooling liquid. Generally, the radiator body is sufficiently filled with cooling fluid. Therefore, the radiator body needs a means to prevent overflow, and the reserve tank is also provided with a control means for injecting a predetermined amount of coolant. For this reason, the device for injecting the coolant into the radiator becomes complicated due to its complexity, and it becomes extremely difficult to manage the amount of coolant to be injected.

The present invention has been made to overcome the above-mentioned disadvantages, and includes a radiator body and a reserve tank that communicates with the radiator body through an overflow tube from a conduit provided on the side of the inlet of the radiator body. When injecting a specified amount of coolant into the radiator, first, the air inside the radiator body is sucked to create a negative pressure inside the radiator body, and a predetermined amount of coolant is injected into the reserve tank via the overflow tube. Then, by fully injecting the coolant into the radiator body, which has become under negative pressure, and again injecting the remaining coolant into the reserve tank via the overflow tube, it is possible to eliminate variations in the capacity of the radiator body. To provide a method and device for injecting a coolant that makes it possible to easily, reliably, and wastefully fill a radiator body with the coolant without the liquid being drained.

In order to achieve the above object, the present invention provides a method for injecting a prescribed amount of coolant into a radiator comprising a radiator body and a reserve tank communicating with the radiator body, the method comprising: creating a negative pressure inside the radiator body; At the same time, a first step of injecting a predetermined amount of coolant into the reserve tank, a second step of injecting the coolant into the radiator body, which has become under negative pressure, and a second step of injecting the coolant into the radiator body, which is filled with the coolant. The method is characterized by comprising a third step of detecting this and again injecting a prescribed amount of coolant into the reserve tank.

Furthermore, the present invention provides an injection device for injecting a prescribed amount of cooling liquid into a radiator comprising a radiator main body and a reserve tank communicating with the radiator main body, and the injection device A pipe body communicating with a port to which the suction means is connected, a first opening/closing means for opening/closing a passage for a coolant injected into the radiator body, and a first opening/closing means for opening/closing a passage for a coolant injected into a reserve tank. The present invention is characterized in that it is comprised of two opening/closing means, an injection part that engages with an injection port formed in the radiator body, and a detection means that detects that the radiator body is filled with cooling liquid.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the cooling liquid injection method according to the present invention will be described in detail in relation to an apparatus for carrying out the method, with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a coolant injection device according to the present invention, and the injection device 10 includes a nozzle body 12.
The nozzle body 12 has a first piston 14 including a valve body for selectively injecting and switching the coolant to the reserve tank, and a first piston 14 connected to the radiator body and the reserve tank, respectively. An injection part 16 for injecting the coolant and a second piston part 18 for selectively switching the injection of the coolant into the inside of the radiator body are attached. A hole 20 is formed in a substantially central portion of the nozzle body 12 and extends through the nozzle body 12 from one end to the other end. In fact, the hole 20 communicates between a chamber 22 defined at one end of the nozzle body 12 and having a large diameter section and a small diameter section, and a chamber 24 defined at the other end.

The chamber 24 communicates with one end of the passage 26, and "
The other end of the passage 26 is bent and communicates with the port 28 . A passage 30 is provided in the nozzle main body 12 and extends in a direction perpendicular to the hole 20, and one end of the passage 30 is in communication with the port 32. Note that the other end of the passage 30 communicates with the hole 20. The first piston portion 1 is disposed on one side of the nozzle body portion 12.
A fitting hole 34 into which 4 is fitted is defined. The fitting hole 34
are formed by recesses 36a, 36b, and 36c having different diameters, and a passage 3 is formed in a part of the circumferential surface forming the recess 36b.
8 are in communication, and the passage 38 is in communication with the outside via a port 40. Along with this, a recess 36a is formed.
A passage 42 is defined in a part of the circumferential surface of the passage 42.
is in communication with the chamber 22.

A valve body housing member 39 constituting the first piston portion 14 is fitted into the fitting hole 34 . The valve body housing member 39 has an external 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 inside thereof. In this case, the valve body housing member 39
A hole 43 is bored at one end side forming the small diameter portion of the chamber 41, thereby making the passage 30 and the chamber 41 communicate with each other, and the peripheral wall surface of the valve body housing member 39 is provided with the hole 43. Holes 39a and 3 are formed so as to correspond to the passages 38 and 42.
9b is drilled.

Next, a first piston 44 is disposed in the chamber 41 .

That is, one end of the piston loft of the first piston 44 is slidably fitted into the small diameter portion of the chamber 41, and the tip thereof has a small diameter in a tapered shape to fit into the hole 43.
It constitutes a valve body 44a that can be opened and closed. On the other hand, a large diameter flange portion is formed on the other end side of the first piston 44, and substantially constitutes a piston body. The outer peripheral wall surface of the flange portion is in slidable contact with the inner peripheral wall surface of the chamber 41, and one end side of a coil spring 46 is pressed against the flange portion of the first piston 44. In this case, the other end of the coil spring 46 is engaged with a lid member 48 that engages with the fitting hole 34 so as to close the chamber 41. Therefore, the first piston 44 is pressed in the direction of arrow A under the pressing action of the coil spring 46.
It will be easily understood that the valve body 44a is in a position to close the hole 43.

On the other hand, a chamber 2 formed at one end side of the nozzle main body 12
2 is fitted with a sleeve 50 constituting the injection section 16. In this case, the sleeve 50 includes a first cylindrical portion 50a that fits into the small diameter portion of the chamber 22, a second cylindrical portion 50b that fits into the large diameter portion of the chamber 22, a flange portion 50c, and the flange portion 50c. Third cylindrical portion 50 extending from portion 50c
d, a threaded portion 50e having a smaller diameter than the third cylindrical portion 50d, and a fourth cylindrical portion 50f located below the threaded portion 50e. A nut member 5 constituting the injection part 16 is screwed into the threaded part 50e. A circumferential recess is formed in the nut member 52, and a ring-shaped seal member 54 is engaged with the recess.

Next, a sealing member 56 is fitted onto the tip of the cylindrical portion 50f constituting the sleeve 50, and the sealing member 56 is connected to the injection port 6 formed in the radiator body 62 of the radiator 60.
4. In this case, a circumferential groove 66 is defined by the end surface of the sealing member 56, and the circumferential groove 66 communicates with a reserve tank, which will be described later, via a conduit 68 and an overflow tube 70 that are in communication with the inlet 64. are doing. Furthermore, the sleeve 50 includes the chamber 22 and the surrounding area. ! A plurality of holes 72 are bored for communicating with the Ifi 66.

Note that a hole 74 is formed in the first cylindrical portion 50a and extends in the axial direction thereof. The hole 74 is substantially coaxial and has the same diameter as the hole 20 formed in the nozzle body 12, and the second hole 74 is provided inside the hole 20 and the hole 74.
A valve body 76 formed at the tip of a piston rod 75 constituting the piston portion 18 is fitted. In fact, the valve body 76 is in sliding contact with the inner circumferential wall of the cylindrical portion 50f. The intermediate portion of the piston rod 75 is once reduced in diameter to the hole 74.
The nozzle main body 1 extends into the nozzle body 1 and becomes large in diameter again.
The inside of the chamber 24 formed in 2 is faced. Inside the chamber 24, the histone rod 75 is integrated with the piston 76a. The outer peripheral wall surface of the piston 76a is an O-ring 78.
engage. That is, it will be easily understood that the chamber 24 is separated into a chamber 24a and a chamber 24b by the piston 76a. Further, a piston loft 77 extending from the other end of the piston 76a is fitted into a hole 80 of a joint member 79 that projects from the nozzle body 12 and forms the second piston portion 18. The joint member 7
A boat 82 is formed at the tip of the hole 80 of 9, a passage 83 is provided near the boat 82, and a pressure sensor 85 is provided on the joint member 79 so as to face this passage 83.

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

In addition, in the figure, reference numeral 76b indicates the piston rod 75.7.
7 is shown to communicate with the boat 82. Further, reference numeral 89 indicates an O-ring provided at each location to prevent leakage of coolant, air, etc.

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

In FIG. 2, reference numeral 90 indicates a tank storing the coolant to be injected, and a suction pipe 94 of a pump 92 for feeding the coolant faces inside the tank 90. One end of a conduit 96 is connected to the discharge side of the pump 92, and the other end of the conduit 96 is connected to the suction side of a fixed quantity dispensing device 98. Further, the discharge side of the quantitative discharge device 98 is connected to a cooling liquid injection device 10 according to the present invention via a pipe line 100.
It communicates with a port 32 formed in the. The injection device 10 communicates with a reserve tank 102 constituting the radiator 60 via the overflow tube 70, and one end of a conduit 104 is connected to the port 82 of the infusion device 10, and the other end of the conduit 104 is connected to the port 82 of the injection device 10. is connected to the switching valve 106. Further, the switching valve 106 communicates with a vacuum pump 110 via a conduit 108. Note that the pipe line 108 branches off midway and is connected to a pressure gauge 114 . In this case, the valve bodies 44a and 76, the pressure sensor 85, and the switching valve 106, which are incorporated in the metered discharge device 98 and the injection device 10, are controlled by the control device 116.

Next, the operation and effects of the present invention will be explained.

First, as shown in FIG.
is engaged with the radiator body 62. That is, injection part 1
6 is attached to the radiator body 62.
The sealing member 54 that fits into the injection port 64 and is engaged with the NAND member 52 is brought into close contact with the upper surface of the injection port 64. In this case, by screwing the nut member 52, the position of the seal member 54 can be adjusted to correspond to the injection port 64.

Therefore, as shown in FIG. 3, the air inside the radiator body 62 is sucked, and a predetermined amount of cooling fluid is injected into the reserve tank 102. That is, by operating the vacuum pump 110 and the switching valve 106, air existing inside the radiator body 62 is sucked from the suction passage 76b through the port 82. At the same time, the pump 92 and metering discharge device 98 are operated to supply cooling liquid to the injection device 10 . At that time, from the port 40 to the first piston 44
Pressure fluid for driving the chamber 41 is supplied to the chamber 41.

As a result, the first piston 44 is connected to the coil spring 4
It moves in the direction of arrow B against the pressing force of 6, thereby communicating the hole 43 and the passage 42. Therefore, the coolant supplied from the port 32 is supplied to the reserve tank 102 via the passage 30, the hole 43, the passage 42, the chamber 22, the hole 72, the circumferential groove 66, the conduit 68, and the overflow tube 70. become.

When a predetermined amount of coolant is supplied to the reserve tank (in this case, the minimum specified amount of the reserve tank is preferable),
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 air inside the radiator body 62 is further continuously sucked until a predetermined negative pressure is reached. At this time, it can be easily understood from FIG. 3 that the metering discharge device 98 is deenergized.

Next, when the pressure within the radiator body 62 reaches a predetermined negative pressure, the switching valve 106 is deenergized and stops evacuation.

At approximately the same time, the work of injecting coolant into the radiator main body 62 is performed.

That is, the metering discharge device 98 is operated, and pilot pressure fluid is supplied to the chamber 24b through the port 84 of the injection device IO, thereby causing the piston 76a to be displaced downward in the figure. That is, the valve body 76
It is displaced to the position shown by the two-dot chain line in the figure. Due to this displacement of the valve body 76, the coolant supplied from the metered discharge device 98 to the port 32 is supplied into the radiator body 62 through the passage 30 and the hole 20. Changes in the internal pressure within the radiator body 62 at this time are detected by the pressure sensor 85 via the suction passage 76b. When the pressure sensor 85 detects that the coolant is sufficiently supplied to the radiator body 62, a signal thereof is sent to the control device 116, which causes the pressure fluid to be supplied to the chamber 41 again via the boat 40 and the passage 38. is supplied, and the first piston 44
moves in the direction of arrow B in the same manner as described above, and coolant is supplied to the reserve tank. In this case, when it is detected that the coolant in the radiator body 62 is sufficient, the chamber 24b
At the same time, the pilot pressure fluid is supplied to the chamber 24a via the boat 28 and the passage 26. As a result, the piston 76a is displaced, and the valve body 76 returns to the position shown by the solid line in FIG. 1, thereby stopping the supply of coolant to the radiator body 62. When a specified amount of coolant is injected into the reserve tank 102, the supply of the pilot pressure fluid to the boat 40 is stopped, and at the same time, the metering discharge device 98 is deenergized and the coolant is injected into the radiator 60. is completed.

As described above, according to this embodiment, the radiator main body 62
The air inside the radiator body 62 is sucked and the coolant is injected into the reserve tank 102. Then, when the inside of the radiator body 62 becomes a predetermined negative/positive temperature, the coolant is injected into the radiator body 62. Furthermore, when the radiator body 62 is sufficiently filled with the coolant, the reserve tank 10 is filled again.
Coolant is injected into 2. Therefore, it is possible to inject a predetermined amount of coolant into the radiator body 62 and the reserve tank 102 without being affected by variations in the capacity of the radiator body 62. Furthermore, since the injection device 10 according to the present invention can inject into both the radiator main body 62 and the reserve tank 102, the amount of injection can be accurately and easily managed.

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 in FIG. 1 indicate the same components, and therefore, detailed explanation thereof will be omitted.

In the first embodiment, a pressure sensor 85 is used as a means for detecting the amount of coolant injected into the radiator body 62, but in this embodiment, as shown in FIGS. A check valve 118 is disposed inside the injection section 16 that constitutes the device 10. That is, among the plurality of holes 72 formed in the sleeve 50 constituting the injection part 16, one hole has a large diameter to provide a chamber 72a, and the sealing member 56 has a hole coaxial with the chamber 72a. A hole 120 is perforated. This brings the circumferential groove 66 and the inside of the radiator body 62 into communication.

Then, one end side of the valve body 122 constituting the check valve 118 is loosely fitted into the chamber 72a. The other end of the valve body 122 protrudes toward the circumferential groove 66 and has a hemispherical head 12 at its tip.
Form 2a. In this case, the head 122a faces the hole 120 formed in the seal member 56. moreover,
A coil spring 124 is arranged in the chamber 72a,
One end of this coil spring 124 is in contact with an end surface forming the chamber 72a, and the other end is fitted onto the valve body 122, and its end is in pressure contact with the head 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 operation of injecting coolant into the radiator 60 using the injection device 10 configured as described above will be explained.

First, the air inside the radiator body 62 is sucked by the same operation as in the first embodiment, and a predetermined amount of cooling liquid is supplied to the reserve tank 102. Furthermore, after suction of the air inside the radiator body 62 is completed, the radiator body 62 is sucked. A cooling liquid is supplied into 62. In this case, it goes without saying that the injection of coolant into the reserve tank 102 is temporarily stopped. When the coolant is sufficiently injected into the radiator body 62 and further coolant is injected into the radiator body 62, the coolant overflows into the hole 12.
It reaches within 0. As a result, the valve body 122, which closes the hole 120, due to the hydraulic pressure of the cooling fluid is moved to the coil spring 1.
24 and is displaced against the pressing force of the hole 120 and the circumferential groove 6.
6 becomes in communication, and eventually the overflowing cooling liquid is injected into the reserve tank 102 from the circumferential groove 66 via the pipe line 68 and the overflow tube 70. When a prescribed amount of coolant is injected into the reserve tank 102 in this manner, the valve body 76 returns to its original position in the same manner as in the first embodiment, and the operation of injecting the coolant into the radiator 60 is completed.

As described above, according to this embodiment, a predetermined amount of coolant can be injected into the radiator main body 62 and the reserve tank 102 similarly to the first embodiment. The effect is also almost the same as that of the first embodiment, but according to this embodiment, the overflow detection means is mechanically performed by a check valve, so the configuration of the control device 116 is simplified. It also has the advantage of being able to be converted into

As described above, according to the present invention, when injecting coolant into the radiator which is composed of a radiator body and a reserve tank, first, air inside the radiator body is sucked, and a predetermined amount of coolant is injected into the reserve tank. Next, coolant is injected into the radiator body to sufficiently fill the radiator body, and excess coolant is again injected into the reserve tank. In this case, said action takes place with a single injection device.

Therefore, it is possible to inject the coolant into the radiator body and the reserve tank with one nozzle, and the radiator body is reliably filled with the coolant without any waste regardless of variations in the capacity of the radiator body. It also becomes possible to inject a specified amount of coolant into the reserve tank.

Furthermore, since the injection amount of the radiator liquid can be managed very easily and the injection device itself is a single unit, there is an advantage that the entire device can be simplified.

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

[Brief explanation of the drawing]

Fig. 1 is a partially omitted vertical sectional view showing a cooling liquid injection device according to the present invention, Fig. 2 is a connection explanatory diagram of the cooling liquid injection device according to the invention, and Fig. 3 is a cooling liquid injection device according to the invention. FIG. 4 is a partially omitted vertical cross-sectional view showing another embodiment of the cooling liquid injection device according to the present invention, and FIG. 5 is the cooling liquid injection device shown in FIG. 4. It is a connection explanatory diagram. 10... Injection device 12... Nozzle body part 14.18... Piston part 22.24... Chamber 4
4...Piston 46...Coil spring 50...Sleeve 54.56...Seal member 60...Radiator 62...Radiator body 70...Overflow tube 76...Valve body 102...・Reserve tank FIG, 3 hours

Claims (7)

[Claims] (1) A method of injecting a specified amount of coolant into a radiator consisting of a radiator body and a reserve tank that communicates with the radiator body. A first step of injecting the coolant, a second step of injecting the coolant into the negative pressure radiator body, and a second step of injecting the coolant into the reserve tank after detecting that the radiator body is filled with the coolant. and a third step of injecting a prescribed amount of coolant into the liquid. (2) An injection device for injecting a specified amount of coolant into a radiator consisting of a radiator body and a reserve tank communicating with the radiator body, which sucks air within the radiator body and the radiator body. a pipe body that communicates with a port to which the means is connected; a first opening/closing means that opens and closes a passage for a coolant injected into the radiator body;
a second opening/closing means that opens and closes a passage for the coolant injected into the reserve tank; an injection part that engages with an injection port formed in the radiator body; and a detection unit that detects that the radiator body is filled with the coolant. 1. A cooling liquid injection device comprising: a detection means. (3) In the device according to claim 2, the injection portion that engages with the injection port formed in the radiator main body is the first injection portion.
a sleeve member that fits over the opening/closing means of the sleeve member, a first seal member disposed at the tip of the sleeve member and substantially engaged with the inlet of the radiator, and a nut member disposed approximately in the center of the sleeve member. A cooling liquid injection device comprising a second sealing member attached through the cooling liquid injection device. (4) In the device according to claim 2 or 3, the first opening/closing means for opening and closing the passage of the coolant injected into the radiator body is a piston that reciprocates by the fluid pressure of the pilot pressure fluid. A coolant injection device comprising a valve body that is displaced as the piston moves and communicates and closes the passage and the inside of the radiator body. (5) In the device according to any one of claims 2 to 4, the second opening/closing means for opening and closing the passage of the coolant injected into the reserve tank is operated by the second opening/closing means under the pressing action of the elastic body. A coolant injection device consisting of a piston that closes a passage and opens by the fluid pressure of a pilot pressure fluid, and a valve body provided at the tip of a rod of the piston. (6) In the device according to any one of claims 2 to 5, the means for detecting that the radiator body is filled with cooling liquid is connected to a port communicating with the radiator body. A coolant injection device is connected to a sensor for detecting the pressure within the radiator body. (7) In the device according to any one of claims 2 to 5, the means for detecting that the radiator body is filled with cooling liquid engages with an inlet formed in the radiator body. A coolant injection device that is a check valve that is provided inside an injection part and is operated by the hydraulic pressure of the coolant.