JP3146168B2 - Engine cooling water exchange device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LLC in an engine cooling water path including a radiator and a water jacket.
The present invention relates to an engine cooling water exchange device that exchanges engine cooling water such as (long life coolant).

[0002]

2. Description of the Related Art Conventionally, as an engine cooling water exchange apparatus of the above-mentioned example, there is, for example, an apparatus described in Japanese Utility Model Registration No. 3014362 which has been invented by the present applicant. That is,
The discharge line of the air compressor is connected to the drive inlet of the ejector, and a detachable means such as a rubber stopper is connected to the negative pressure operation port of the ejector through a three-way switching valve.
The three-way switching valve is connected to a new liquid tank urged to the atmospheric pressure so as to be switchably connectable.

[0003] When draining the drainage in the engine cooling water path by the above-mentioned engine cooling water exchange device, the above-mentioned attaching / detaching means is attached to a filler port of a radiator, and a negative pressure between the attaching / detaching means and the ejector is controlled by a three-way switching valve. When the operation port is connected to the operation port, the drainage can be extracted by the negative pressure acting on the negative pressure operation port, and the extracted drainage can be collected in the drainage reservoir (drainage collection unit).

When a new liquid is supplied into the engine cooling water path after drainage is drained, the new liquid tank and the attaching / detaching means are communicated with each other by a three-way switching valve. The new liquid can be promptly supplied into the engine cooling water path by the pressure difference between the cooling water path and the atmospheric pressure. In such an engine cooling water exchange operation, it is desired to have an even simpler configuration and quicker exchange.
In the conventional structure described above , negative pressure and atmospheric pressure
However, there is a problem that the demand cannot be sufficiently satisfied because the supply is only performed due to the difference from the above.

[0005]

According to the first aspect of the present invention, there is provided an attaching / detaching means attached to / detached from a filler port or the like of a radiator, a positive pressure line for applying a pressing force , and an intervening means for the positive pressure line. And a negative pressure generating means for generating a negative pressure
And a negative pressure line connected to, by providing a switching means for switching connects the connecting unit to the positive pressure line or vacuum line, more rapid due to the pressure difference between the negative pressure and the pressure yet simple configuration An object of the present invention is to provide an engine cooling water exchange device capable of executing engine cooling water exchange .

[0006] The invention of claim 2, wherein of this invention, together with objects of the invention of the preceding claims 1 Symbol placement, by configuring the negative pressure line above the tank-less structure, discharge in the vacuum line It is an object of the present invention to provide an engine cooling water exchange device that has a simple configuration without a liquid storage tank and that can reliably and quickly drain the drainage while significantly reducing the number of parts and piping man-hours.

According to a third aspect of the present invention, in addition to the object of the first or second aspect , the negative pressure
By connecting a regeneration line for purifying the drainage between the outlet of the generating means and the volume part, the drainage can be purified so that the drainage can be reused while the drainage is extracted. An object of the present invention is to provide an engine cooling water exchange device capable of storing a liquid (regenerated liquid) in a volume portion in preparation for a supply operation thereof.

[0008]

According to a first aspect of the present invention, there is provided an attaching / detaching means attached to / detached from a cooling water inlet / outlet portion such as a filler port of a radiator, and a pressurizing generator for generating a pressing force.
Cut the discharge line of the means into a positive pressure line and a branch positive pressure line.
A switching unit for changing the volume, which is interposed in the positive pressure line, and a negative pressure generating means for generating a negative pressure by using a positive pressure of the branch positive pressure line connected to said negative pressure generating means The engine cooling water exchange device is provided with a negative pressure line and switching means for switching and connecting the above-mentioned attaching / detaching means to a positive pressure line or a negative pressure line.

[0009] The invention of claim 2, wherein the present invention, in conjunction with the configuration of the invention of the claim 1 Symbol mounting, characterized in that the negative pressure line is an engine cooling water exchange device configured tankless structure And

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the present invention, the negative pressure generator is provided.
A regeneration line for purifying waste water between the outlet of the production means and the volume
Connected to the driving flow supplied to the negative pressure generating means.
On the one hand, a negative pressure is applied to drain the drainage liquid and on the other hand the drive
The kinetic flow and the effluent are mixed, and the effluent is recycled in the regeneration line.
It is an engine cooling water exchange device configured to purify raw .

[0011]

According to the first aspect of the present invention, when the engine cooling water is drained, the attaching / detaching means is attached to a cooling water inlet / outlet such as a filler port of a radiator, and the switching means is used. When communicating the detachable unit and a negative pressure line, branching using positive pressure of the positive pressure line a negative pressure generating means
Generates a negative pressure, so that the drainage liquid can be directly extracted by the negative pressure suction force of the negative pressure line connected to the negative pressure generating means .

When supplying engine cooling water,
Leave reservoir of fresh solution in advance in the volume, when the communication between the connecting unit and the positive pressure line by the above-mentioned switching means both switching
Cut the discharge line of the pressure generation means to the positive pressure line side
In other words, a new liquid can be supplied very quickly due to the pressure difference between the engine cooling water path whose internal pressure is maintained at a negative pressure and the pressure of the pressurization generating means at the time of drainage.
As described above, there is an effect that the engine cooling water can be more quickly exchanged by the differential pressure between the negative pressure and the pressurizing force while having a simple configuration.

Further, since only the positive pressure acts on the above-mentioned volume, when this volume is constituted by a tank or the like, a structure capable of withstanding both the negative pressure and the positive pressure is not required. Only a simple structure that can withstand only. In addition, since the above-mentioned negative pressure line obtains a negative pressure by using the positive pressure of the branch positive pressure line, a positive pressure source such as an air compressor for the positive pressure line (single pressure source) is used as the pressure source. Pressure source) only, and the use and simplification of the used pressure source can be achieved .

According to the second aspect of the present invention of this invention,
In conjunction with the effects of the invention described in claim 1 Symbol placement, so to constitute a vacuum line above the tank-less structure, in a simple configuration without the drainage storage tank to the line, the number of parts, the pipe steps There is an effect that the drainage can be reliably and promptly withdrawn while achieving a significant reduction.

According to the third aspect of the present invention,
In conjunction with the effects of the invention described in claim 1 or 2, wherein, since the connecting reproduction line to purify drainage between the outlet and the volume of the negative pressure generating means described above, it is supplied to the negative pressure generating means
The driving flow is negative pressure on the one hand,
On the other hand, the drained liquid and the driving flow can be mixed to purify the discharged liquid in a reusable manner, and the purified liquid (regenerated liquid) is prepared for the supply operation. There is an effect that it can be stored in the volume.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows an engine cooling water exchange device. First, referring to FIG. 1, the configuration of an engine cooling water passage 1 will be described.
A radiator 6 is provided as a radiator having a radiator core 4 and a lower tank 5. The lower tank 5 of the radiator 6 and the various water jackets 7 on the engine side are connected by an outlet line 8 such as an outlet hose. The water coolant jacket 7 and the upper tank 3 of the radiator 6 are connected to each other through an inlet line 9 such as an inlet hose to constitute the above-described engine cooling water path 1.

In the engine cooling water outlet control type engine, a thermostat valve is provided in the above-mentioned inlet line 9. In the engine cooling water inlet control type engine, a thermostat valve is provided in the above outlet line 8. Is arranged. In FIG. 1, reference numeral 10 denotes an oil pan, and 11 denotes a cylinder head cover. Furthermore, the above-mentioned water jacket 7 is originally formed in a complicated manner with respect to the cylinder block and the cylinder head, but is simplified in the drawings. The engine cooling water exchange device for exchanging the cooling water (cooling water, antifreeze, LLC, etc.) in the engine cooling water path 1 is configured as follows.

That is, a plug 12 made of rubber or the like having a tapered conical outer shape and having a communication passage therein as a detachable attaching / detaching means which is attached to the filler port 2 of the radiator 6 in a liquid-tight manner and is detachable. A communication line 13 connected to the plug 12; an air compressor 14 as a pressurization generating means for compressing air to generate a pressurizing force (positive pressure higher than the atmospheric pressure); A switching unit 17 having a three-way valve structure connected to the discharge line 15 of the
7, a positive pressure line 19 connected to one port a via a pressure regulating valve 18 (pressure regulating means), and a positive pressure acting as a volume provided in the positive pressure line 19 acts. A pressure-resistant tank 20 that does not act at all, a branch positive pressure line 22 connected to another port 6 of the switching unit 17 via a pressure regulating valve 21 (pressure regulating means), and high-speed driving air from the air compressor 14 described above. The ejector 23 as negative pressure generating means for generating a negative pressure at the secondary flow action port 23a using the flow ( positive pressure of the branch positive pressure line 22 ) as a primary flow, and the secondary flow action of the ejector 23 port 23a and one port in the switching unit 24 of the three-way valve structure as a switching means
c .
The arrangement position of the above-described pressure regulating valve 18 depends on each of the elements 16 and 17.
May be between.

Here, a coupler 26 is provided on the communication line 13, and the base end of the communication line 13 is connected to another port d of the switching unit 24. Further, a tip portion 19 of a positive pressure line 19 in which the above-described pressure-resistant tank 20 is provided.
a is connected to the remaining port e of the switching unit 24.

Further, the above-mentioned ejector 23 has an inner pipe 32 provided with an injection hole 29, a nozzle 30, and a driving inlet 31 inside an outer pipe 28 provided with a secondary flow port 23a and a mixing outlet 27. Then, a high-speed driving airflow (positive pressure of the branch positive pressure line 22) from the air compressor 14 used as a fluid pressure source (air pressure source) is ejected from the injection hole 29 at the tip of the nozzle 30 as a primary flow, and a secondary flow is generated. By sucking into the mixing chamber, the secondary flow action port 2
A negative pressure is formed in 3a.

On the other hand, the above-described pressure-resistant tank 20 has a tank lid detachably screwed to the upper end of the tank body via a packing, but is simply shown for convenience of illustration. The above-mentioned pressure-resistant tank 20 may be partially or entirely made of a transparent body in order to visually observe the amount of the liquid content from the outside, and is constructed by attaching a separate indicator to the opaque tank. You may. In any case, since only positive pressure acts on the pressure-resistant tank 20, this tank 20
Does not need a structure capable of withstanding both negative pressure and positive pressure, and may have a simple structure capable of withstanding only positive pressure. The pressure-resistant tank 20 is provided with a safety valve as necessary.

Furthermore, each element between the respective couplers 16, 26 of the upper predicate whereas is unitized into a single unit, communicating line 13 between the coupler 26 and the plug 12 in consideration of workability, the tube And a flexible member such as a hose, preferably a transparent or translucent flexible member. In addition, the above-described switching units 17 and 24 are linked so that simultaneous switching can be performed by a single lever operation.

The illustrated embodiment is constructed as described above, and its operation will be described below. L in engine cooling water path 1
When draining the cooling water (drainage liquid) such as LC, as shown in FIG. And the air compressor 14 and the engine are driven.

When a negative pressure (for example, a pressure reduction of 500 mmHg or more) is applied to the engine cooling water path 1 through the elements 23a, 25, c, d, 13, and 12 while the engine is driven, cooling is performed. Since the boiling point of the water is lowered, the cooling water in the engine cooling water path 1 is heated at a low temperature by the engine heat, is artificially overheated and boils, and the generated water pressurizes the cooling water.
Due to the negative pressure acting on the engine cooling water path 1, almost all of the cooling water (discharge liquid) and the bubbles in the engine cooling water path 1 are removed from the respective elements 12, 13, as shown by arrows in FIG.
Through d, c, 25, 23a, 27, it is possible to extract and discharge in a very short time.

When the internal elements of the switching units 17 and 24 are simultaneously rotated counterclockwise by 90 degrees from the state shown in FIG. 1 and the air compressor 14 is stopped, the internal pressure of the engine cooling water path 1 becomes negative. However, such operation can be omitted when a new liquid is supplied immediately after the drainage is drained and discharged. Next, engine cooling water path 1
When a new liquid such as LLC is supplied into the apparatus, the air compressor 14 is driven as shown in FIG. 2, and the switching sections 17, 24 are simultaneously switched by a single lever operation as shown in FIG.

In this state, each of the elements 15, 16, 1
Since the pressure-resistant tank 20 is pressurized through 7, a, 18, and 19, the engine cooling water path 1 is maintained at a negative pressure inside.
The new liquid urged by the pressurizing force is supplied through the elements 19a, e, d, 13, 26 and 12 as indicated by arrows in FIG. Therefore, a new liquid can be rapidly supplied in a very short time due to the pressure difference between the positive pressure (pressure) and the negative pressure.

As described above, according to the above embodiment, when the engine cooling water (drainage) is to be drawn (see FIG. 1), the attaching / detaching means (see plug 12) is connected to the filler port 2 of the radiator 6.
And the like, and switching means (switching part 2)
4), the connecting / disconnecting means (see plug 12) communicates with the negative pressure line 25, and the negative pressure generating means (see ejector 23) generates negative pressure using the positive pressure of the branch positive pressure line 22.
To so, vacuum line 2 connected to the negative pressure generating means
The drainage liquid can be directly extracted by the negative pressure suction force of No. 5.

When supplying the engine cooling water (new liquid) (see FIG. 2), the new liquid is stored in the volume portion (see the pressure-resistant tank 20) in advance, and the above-mentioned switching means (see the switching portion 24). ) by detachable means (both when communicating the plug 12 reference) and positive pressure line 19, pressurized by the switching unit 17
The discharge line 15 of the pressure generating means is switched to the positive pressure line 19
In this case, a new liquid can be supplied very quickly due to the pressure difference between the engine cooling water path 1 and the positive pressure (pressure), the inside of which is maintained at a negative pressure during drainage. As described above, there is an effect that the engine cooling water can be more quickly exchanged by the differential pressure between the negative pressure and the pressurizing force while having a simple configuration.

Further, since only the positive pressure acts on the above-mentioned volume portion (see the pressure-resistant tank 20), when this volume portion is constituted by the tank 20 or the cylinder, it can withstand both the negative pressure and the positive pressure. A simple structure that does not require a configuration and can withstand only positive pressure may be used. In addition, the negative pressure line 25 of the above minute
Since the negative pressure is obtained by using the positive pressure of the branch positive pressure line 22, only the positive pressure source (single pressure source) of the air compressor 14 for the positive pressure line may be used as the pressure source. The use and simplification of the use pressure source can be achieved, and the use of a vacuum pump whose use in a gas station is restricted can be avoided.

In addition, since the engine is driven and the engine cooling water is superheated at a low temperature by applying a negative pressure to the engine cooling water passage 1 when extracting the engine cooling water, the boiling point of the cooling water is lowered. The effect that the overheating state is artificially secured, the cooling water is pressurized by the generated bubbles, and the drainage can be drained in a shorter time in combination with the negative pressure acting on the negative pressure line 25. There is.

Moreover, since the above-mentioned negative pressure line 25 is formed in a tankless structure, the line 25 has a simple structure without a drainage storage tank, and the number of parts and piping man-hours are greatly reduced. There is an effect that drainage can be reliably and promptly drained.

FIGS. 3 and 4 show another embodiment of the engine cooling water exchange apparatus. In this embodiment, ports f, g, h are provided between the mixing outlet 27 of the ejector 23 and the pressure-resistant tank 20.
A switching section 33 having a three-way valve structure and a filter 34 are connected via a regeneration line 35 provided therebetween. The regeneration line 35 may be provided with a check valve that allows only the flow in the direction of the arrow in FIG.

Further, an air vent line 37 provided with an open / close valve 36 (open / close means) for air vent is connected to the pressure-resistant tank 20 described above. At the base end of the air vent line 37, an inverted L-shaped air vent pipe 38 is attached.
It is 臨設 in an airtight manner and fluid-tight manner in the air vent pipe 38 a pressure tank 20.

The switching unit 33 is operated independently of the switching units 17 and 24 described above. Further, as the filter 34, Pb, F
It is desirable to use a permeable membrane filter for removing metal ions such as e and Cu, dust, and the like.

Therefore, in the embodiment shown in FIG. 3, when the drainage in the engine cooling water path 1 is drained and the drainage is regenerated and purified, the ports f and g of the switching section 33 are communicated and opened and closed. The valve 36 is opened. The other elements are set under the same conditions as in FIG.

With this setting, the negative pressure generating means and the
Driving flow supplied to the ejector 23, that is, the branch positive pressure line 2
Since the second positive pressure constitutes a negative pressure in one, each element from the plug 12 26,13, d, c, can be withdrawn quickly drainage through 25,23A, on the other hand disconnect within the ejector 23 took drainage and driven flow the (air) were mixed, the
When mixed mixed stream passes through the filter 34 of the reproduction line 35, leading to the breakdown voltage tank 20 in a state in which Pd of the effluent, Fe, metal ions and dust such as Cu is removed.

The air in the mixed flow introduced into the pressure-resistant tank 20 is discharged to the atmosphere through an inverted L-shaped air vent pipe 38, an open / close valve 36, and an air vent line 37. The recovered regeneration liquid can be collected and stored in preparation for the supply operation of the regeneration liquid.
Can be

When the switching section 33 is switched as shown in FIG. 4 and its ports f and h are connected to each other, drainage can be drawn and discharged as in FIG. On-off valve 36
When the switching units 17 and 24 of the interlocking configuration are switched as shown in FIG. 2 and the new liquid (see FIG. 4) or the regenerated liquid (FIG. 3) is supplied into the engine cooling water path 1 in a short time. Can also. At the time of this supply, the above-mentioned switching unit 33 makes communication between the ports f and h as shown in FIG. 4 so that the backflow does not occur in the negative pressure action port 23a.

[0039] Thus, as a negative pressure generating means described above
A regeneration line 35 for purifying drainage is connected between the outlet 27 of the ejector 23 and the volume part (see the pressure-resistant tank 20) ,
Driving flow supplied to negative pressure generating means, that is, branch positive pressure line
On the one hand, the positive pressure of 22 is made non-pressure, and drainage is drained.
On the other hand, the drive flow and the drainage liquid are mixed and flow out from the outlet 27.
Of the wastewater to be regenerated and purified in the regeneration line 35 described above.
In effect capable of reserving the draining sampling while seeking the drainage reusable so it is possible to clean, and the cleaning liquid (regeneration liquid) in preparation for supplying operating the volume (see breakdown voltage tank 20) There is. In other respects, the operation and effects are substantially the same as those of the previous embodiment. Therefore, in FIGS. 3 and 4, the same parts as those in the previous drawings are denoted by the same reference numerals, and detailed description thereof will be omitted.

In correspondence between the structure of the present invention and the above-described embodiment, the attaching / detaching means of the present invention is the same as the plug 12 of the embodiment.
In the same manner, the pressurizing means
The negative pressure generating means corresponds to the ejector 23 and corresponds to the
In response, the volume portion corresponds to the pressure-resistant tank 20, and the switching means corresponds to the switching portion 24 having a three-way valve structure. However, the present invention is not limited to the configuration of the above-described embodiment.

For example, each of the switching units 17, shown in the embodiment,
24, 33 can be replaced by a plurality of on-off valves.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an engine cooling water exchange device of the present invention.

FIG. 2 is an explanatory diagram when a new liquid is supplied.

FIG. 3 is a system diagram showing another embodiment of the engine cooling water exchange device of the present invention.

FIG. 4 is an explanatory view at the time of drainage extraction.

[Explanation of symbols]

 2. Philaport(Cooling water inlet / outlet) 6: Radiator 12: Plug(Removal means) 14 ... Air compressor (Pressure generating means) 15 ... Discharge line 17 ... Switching part  19: Positive pressure line 20: Pressure-resistant tank(Volume part) 22… Branch positive pressure line  24 ... Switching part(Switching means) 25 ... Negative pressure line27 ... Mixing outlet (outlet) 35 ... Reproduction line

Claims (3)

(57) [Claims] 1. Cooling water in / out of a radiator filler port, etc.
Attachment / detachment means attached to / detached from theThe discharge line of the pressure generating means that generates the pressing force
A switching unit for switching between a pressure line and a branch positive pressure line;  A volume portion interposed in the positive pressure line;Branch positive pressure lineGenerating negative pressure using positive pressurenegative
Pressure generating means; Connected to the negative pressure generating means Switch the negative pressure line and the above-mentioned attachment / detachment means to the positive pressure line or the negative pressure line
Engine cooling water exchange device having switching means for connection
Place. 2. The negative pressure line has a tankless structure.
The engine cooling water exchange device according to claim 1, wherein: 3. Between the outlet of the negative pressure generating means and the volume.
A regeneration line for purifying the drainage is connected, and the driving flow supplied to the negative pressure generating means is connected to the negative pressure on the one hand.
Thus, drainage is drained and, on the other hand, the drive flow and drainage are
Mixing and purifying the wastewater by the regeneration line.
The engine cooling water exchange device according to claim 1 or 2, wherein: