JPS5951346B2 - Intermittent injection valve for aerosol - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intermittent injection valve for aerosol that automatically injects an aerosol content at regular intervals. The method is to open and close a valve by sensing the temperature change with a heat sensitive body, or to reserve the aerosol content in a certain space through a suppressor that allows only a certain limited amount of liquid to pass through, and the pressure in this reserved space is Various methods have been proposed, including a method of opening the valve and injecting when the pressure exceeds a certain level.

However, all of these methods were extremely difficult to implement and could not be put to practical use. That is, the above-mentioned method using a heat sensitive body has the drawback that the operating sensitivity of the heat sensitive body varies greatly due to differences in external temperature depending on the place and time of use, and the injection interval and injection amount change greatly. In the method of suppressing the amount of content liquid passing through using a suppressing substance, when the aerosol content liquid passes through this suppressing substance, the propellant dissolved in the content liquid separates and a gas phase is generated, and the generation rate is Since it is not constant, it causes the injection interval and injection amount to change, and this inhibitory substance also creates a filter effect, causing changes in the composition of the contents, clogging of the inhibitory substance, difficulty in injection of high viscosity substances, etc., and adjustment of the injection flow rate. However, this method had disadvantages such as being extremely difficult. In addition, all of the various intermittent injection valves that have been proposed so far require extremely high precision in machining, and if manufacturing errors and the like are taken into account, they cannot be put to practical use.
The present invention eliminates the above-mentioned drawbacks and enables reliable operation without requiring a high level of machining accuracy.One embodiment of the present invention will be described below with reference to the drawings. The mountain cup is fixed to the upper end of the outer peripheral wall 2.
A convex portion 5 of an annular engagement member 4 is fitted and fixed into a groove 3 on the inner surface.

Reference numeral 6 denotes a fixed body which is screwed and fixed to the inner periphery of the upper end of this engagement annular body 4 via a screw groove 7 so as to be freely retractable.An insert body 8 is screwed and fixed inside the body, and a stem 9 of an aerosol container is connected thereto. ing.

Reference numeral 10 denotes a gas phase introduction passage that communicates with one passage 12 of the stem 9 that communicates only with the gas phase portion 11 of the aerosol container;
5 is also continuously formed in the main body 13 whose lower end is screwed to the outer periphery of the fixed body 6, and communicates with a pressurizing chamber 14 having a constant spatial volume also formed in the main body 13.

Reference numeral 15 denotes a suppressor that blocks the gas phase introduction path 10 that communicates the pressurized chamber 14 with the one-way passage 12, and is made of a material that allows the gas phase having a pressurizing force to pass through in a limited manner, such as a grindstone, sintered metal, or open cell. It is formed of synthetic resin, fiber, etc., and is inserted and fixed between the fixed body 6 and the insert body 8.

Reference numeral 16 denotes a pressing body that covers one side of the pressurizing chamber 14 and is formed in a position where it can receive the pressurizing force of the pressurizing chamber 14. The outer peripheral end is fixed in a fixed position by an interior member 27 screwed into the main body 13, and the pressurizing body 16 is A pressure-receiving gasket 17 is located on the pressure chamber 14 side, and a plate spring 18 is located on the outer surface to maintain a pressing force in the direction of the pressure chamber 14 at all times, and an exhaust hole 19 is provided in the center that communicates with the outside air.
is installed.

Reference numeral 20 denotes a sealed body in which a lower end covering ring 2 is brought into airtight contact with the outer periphery of the exhaust hole 19, and is pressed against the surface of the pressure-receiving gasket 17 by a pressing spring 22 having a weaker restoring force than the plate spring 8. At the same time, the engaging collar 23 and the pressurizing chamber 14 protrude toward the outer periphery.
The sliding interval 25 with the engagement receiving flange 24 provided in the pressurizing body 16 is formed to be shorter than the reversal movement distance of the pressing body 16, so that the pressure receiving gasket is moved during the reversal movement as the pressure in the pressurizing chamber 14 rises above a certain pressure. 17, and the exhaust hole 19 is communicated with the outside air.

Reference numeral 26 denotes a pressed body formed at a position with respect to the pressurizing chamber 14 through the press body 6, and the pressure receiving convex portion 28 protruding from the upper end surface is inserted into the interior member 27 by sliding it through the interior material 27. Let me come to you,
The pressing force of this pressing body 16 cannot be received at all times.

29 fixes the upper end to this pressed body 26 and connects the content liquid discharge path 3
0 is a control valve that communicates with a nozzle 31, and a communication hole 32 formed on the side surface that communicates with the content discharge passage 30 is normally sealed with a gasket 33, and the stem 9 is closed only when pressed by the pressing body 16.
It communicates with the other passage 34 .

Reference numeral 35 denotes a threaded body which is screwed onto the insert 8 into which the control valve 29 is slidably inserted, and fixes the gasket 33 at a distance from the insert 8.

Reference numeral 36 denotes a valve mechanism interposed between the stem 9 and the interior of the aerosol container, which is not an essential requirement for operating the intermittent valve of the present invention described above. One passage 12 and the other passage 34 respectively with the phase part.
Any device that communicates with each other during use may be used, but in order to ensure transportation, storage, and safety considerations, it is convenient to use the valve mechanism 36 described above.

The valve mechanism 36 will be explained below. Reference numeral 37 is the upright part of the mountain cup 1, and a housing 39 is fixed to the central part of the valve mechanism 36 through an upper gasket 38. A dip tube 40 is fixed to the lower end of the housing 39, and has a lower end extending to a liquid phase portion located at the bottom of the aerosol container, and an upper end connected to the interior of the housing 39.

41 is a spring for pressing the stem 9, one end of which is inserted into the housing 39, toward the main body 13; 42 is a communication hole drilled in the side surface of the stem 9 to connect the other passage 34 of the stem 9 with the dip tube 40; is sealed by a lower l gasket 43 pressed by a spring 41 and opens only when the stem 9 is pressed down.

Reference numeral 44 denotes an outlet hole formed in the side surface of the stem 9 to connect the one passage 12 to the gas phase part 1 of the aerosol container, and the outlet hole 44 is located at a position partitioned by the lower gasket 43 so as not to communicate with the dip tube 40. It is located within 39.

Reference numeral 45 denotes an opening/closing body having an open end surface pressed against the upper gasket 38 and an annular sealing protrusion 46 protruding from the lower surface pressed against the surface of the lower gasket 43. The stem 9 is inserted through the center of the opening/closing body, and the gas phase part of the aerosol container is closed. 11 and the sealing protrusion 46, and the communication between the outlet hole 44 and the gas phase portion 11 is normally interrupted by the close contact between the sealing protrusion 46 and the lower gasket 43.

When the stem 9 is not pressed in the structure as described above, both the communication hole 42 and the outlet hole 44 are disconnected from the liquid phase and the gas phase, but the fixing body 6 is connected to the screw groove 7. When the stem 9 is screwed in accordingly, the stem 9 is pressed against the restoring force of the spring 41, opening the communication hole 42 and the outlet hole 44 as shown in FIG. 42 connects with the liquid phase.

In this state, the content liquid introduction passage 47 for communicating the other passage 34 and the nozzle 31 is blocked from communicating with the nozzle 31 by the control valve 29, but the passage of the gas phase is restricted by the suppressor 15. However, the gas flows into the gas phase introduction path 10 little by little and is retained in the pressurizing chamber 14. Since this retention is performed sequentially, the pressing body 16 will not suddenly move in reverse until the inside of the pressurizing chamber 4 reaches a constant pressure, but there is a possibility that some deformation, movement, pulsation, etc. , pulsation, etc., the sealing body 20 follows and does not open the exhaust hole 19. When the gas phase is retained in the pressurizing chamber 14 to a certain level or more, the pressurizing force of the gas phase exceeds the pressing force of the plate spring 18,
The plate spring 18 is pushed down (in FIG. 1) together with the pressure receiving gasket 17 against the restoring force, and at the same time the control valve 29 is pushed down.
Since the gasket 33 is deformed and the communication hole 32 is opened by pressing down, the liquid phase in the aerosol container reaches the content liquid introduction path 47 via the dip tube 40, the housing 39, the communication hole 42, and the other passage 34 under its own pressure. , nozzle 31
The content liquid is injected from. Further, the sealing body 20 follows the movement of the pressing body 16 only for a part of the position change of the pressing body 16, and since the sliding interval 25 is shorter than the distance of change of the pressing body 16, the pressing body 16 Due to the movement of
It is discharged to the outside from the discharge hole 48 etc. of No. 7. When the pressure in the pressurizing chamber 14 becomes low, the pressing body 16 is restored by the restoring force of the plate spring 18 and the pressing force on the non-pressing body 26 is released, so that the control valve 29
It returns to its original position due to the pressure of the internal solution and stops ejecting the internal liquid. Next, the injection of the content liquid is interrupted until the gas phase that has passed through the suppressor 15 in a limited manner reaches a constant pressure within the pressurizing chamber.
In the above embodiment, the pressurizing chamber 14 is located above. The control valve 29 is located below the pressurizing chamber 14, and the liquid content is introduced from the other passage 34 of the stem 9, the gas phase is introduced from the one passage 12, and the liquid content is introduced from the dip tube 40. , in other different embodiments, as shown in FIG. It is also possible to completely reverse the positional relationship and the flow relationship between the gas phase and the liquid phase.

That is, this different embodiment is effective when the aerosol container has a mechanism in which the liquid phase and the gas phase are separated by a dividing wall, such as a Sepro can or a piston can.

In this case, the dip tube 40 penetrates the partition wall and comes into contact with the gas phase located toward the outer periphery or lower end of the container, and the liquid phase 49 is located above. Alternatively, it can also be used when a normal aerosol container is used in an inverted state. Therefore, in the embodiment shown in FIG. 2, the liquid phase 49 is introduced from one passage 12 through the fixed body 6 and the main body 13, and a liquid introduction passage 47 is provided in the upper end direction. It is configured to be guided to the control valve 29. The gas phase is introduced through the dip tube 40, the communication hole 42, and the other passage 34, and is fixed in the gas phase guide path 10 formed in the insert 8 and the fixing screw 50 screwed onto the lower end of the insert 8. are sequentially retained in the pressurizing chamber 14 while their circulation is suppressed by the suppressor 15 fixed between the screw 50 and the insert body 8,
When the pressure inside the pressurizing chamber 14 reaches a certain level or higher, the pressing body 16 moves in reverse, pushes up the control valve 29 in the negative direction via the pressed body 26, opens the communication hole 32, and drains the liquid from the nozzle 31. Spray. All of the detailed parts not explained above are the same as those of the first embodiment except that the direction of action is upside down. Since the present invention is configured as described above, it is possible to intermittently spray the aerosol content, and the deodorant,
Insecticides and other arbitrary contents can be automatically sprayed at regular intervals depending on the purpose without requiring any intervention.
In addition, since only the gas phase passes through the suppressor and is introduced into the pressurizing chamber, clogging of the suppressor, deterioration of the content liquid, inability to eject highly viscous materials, etc. will not occur. Since this does not occur, the amount of gas phase passing through the suppressor per hour set at the time of manufacturing does not change until the end, making it possible to reliably control the injection interval and obtain a highly reliable product. In addition, since the liquid content is injected without passing through the suppressor at all, the injection amount can be adjusted by adjusting the diameters of the communication hole, one and the other passages, the nozzle, etc., regardless of the injection interval. The injection interval and injection amount can be arbitrarily set depending on the aerosol content, and a wide variety of intermittent aerosol products can be obtained. In addition, since the pressure rest and the control valve are formed separately, the influence of the pressure body on the control valve only needs to be applied when the pressure body is opened or closed, and a high degree of machining accuracy is not required. do not have. In other words, the pressing body only needs to press the control valve in the valve opening direction when the pressure in the pressurizing chamber increases, and does not press the control valve when the pressure in the pressurizing chamber is low, so there is no need for special machining precision. never required. In addition, the exhaust hole when the pressure is off is sealed by a sealing body that follows the movement of the presser within a certain range, so even if some movement or pulsation of the presser occurs during the pressure rise process in the pressurized chamber, the exhaust hole will be closed. This allows for reliable operation of the device without causing any opening.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1I is a sectional view, and FIG. 2 is a sectional view showing another different embodiment. 11... Gas phase section, 14... Pressurized chamber, 1
5... Suppressing body, 16... Pressing body, 19
...Exhaust hole, 20... Sealing body, 29.
...Control valve, 31...Nozzle.

Claims (1)

[Claims] 1. A pressurized chamber that communicates only with the gas phase portion of the aerosol container via a suppressor that can suppress the flow of the gas phase of the aerosol product, and at least a portion of the pressurized chamber as the pressure rises above a certain pressure. A pressing body that changes its position and returns to its original position as the pressure in the pressurizing chamber decreases, and a part of the pressing body has an exhaust hole that communicates the outside air with the pressurizing chamber, and the exhaust hole of this pressing body and the outside air. a sealing body that is pressed and biased by the pressing body to block the flow and follows only a portion of the positional change of the pressing body, and a liquid phase portion of the aerosol container that is pressed and opened as the pressing body changes in position. 1. An intermittent injection valve for an aerosol, comprising a control valve formed separately from a pressing body, which communicates with the nozzle and interrupts this communication when the pressing body returns to its original state.