JP4966068B2 - Suction type injector - Google Patents

Description

  The present invention relates to a suction type injector.

  Conventionally, liquid injectors are roughly classified into the following three types. The first type is represented by an aerosol container, in which the injection gas and the liquid to be injected are accommodated in the same pressure vessel, and the liquid to be injected is discharged in the form of a mist or mousse together with the injection of the injection gas. Type. In the second type, the pressure container is a double container, the inner container is a flexible container, the liquid to be injected is stored inside, and the high pressure gas is stored outside, thereby adding the inner flexible container. The liquid to be ejected is ejected by the pressure. The third type includes an injection cylinder connected to the injection mechanism section, and an injection liquid storage chamber connected to the injection mechanism section separately from the injection cylinder, and is injected by ejecting gas from the injection cylinder. It is a suction type injector that sucks and jets the liquid to be jetted in the liquid storage chamber. In this suction type injector, since the liquid to be injected and the injection gas are accommodated in separate containers, it is not necessary to consider the compatibility between the liquid to be injected and the injection gas, the alteration of the liquid to be injected by the injection gas, and the like. There is an advantage that it is not necessary to use the pressure-resistant container as the liquid storage chamber and the degree of freedom of its material and design is high, but it is not as frequently used as the first aerosol container. The present invention proposes an improvement of the third suction type injector and aims at its effective use.

  As a suction type injector, what is shown to patent documents 1-3 is proposed. The injector described in Patent Document 1 is configured such that an injection cylinder and an injection liquid container containing an injection liquid (paint) are completely separated, and each is attached to a lower part of an injection mechanism. The user performs injection by holding the injection cylinder and depressing the operation unit of the injection mechanism.

The injector described in Patent Document 2 is provided with a storage chamber for a liquid to be injected in an injection mechanism (aerosol head) of an aerosol container which is an injection cylinder, and the size of the storage chamber is limited by the size of the aerosol head. Therefore, even if a large one cannot be used forcibly, the entire weight balance is biased upward, and the installation stability and operability deteriorate. Further, in the injection mechanism disclosed in Patent Document 2, it may be difficult to obtain a fine fine mist.
The injector described in Patent Document 3 is provided with a liquid container to be injected at a lower part of an injection cylinder, and a tube connecting the injection mechanism to the liquid container to be injected is led to the lower side of the pressure cylinder through the side of the pressure cylinder. It is necessary and the structure becomes complicated.

  As described above, in each of the injectors described in these patent documents, a sufficiently large injection cylinder is used as compared with the liquid container to be injected. However, if the injection cylinder is large, a large amount of gas remains in the injection cylinder even if there is no liquid to be injected, and a large amount of gas is released into the atmosphere in order to discard it. Even if it is used, it cannot be said that it is environmentally preferable. In addition, the manufacture and sale of an unnecessarily large amount of high-pressure gas remains a question from the viewpoint of safety to society, even if sufficient consideration is given to safety. In particular, a high-pressure gas of 30 ml or more is required to be displayed as a high-pressure gas because there is a risk of explosion. The use of large gas cylinders should be avoided as much as possible from the standpoint of ensuring social safety. In this regard, in a general aerosol container in which the liquid container to be injected and the injection gas are stored in the same high-pressure cylinder, there is a limit to downsizing the entire cylinder. On the other hand, in the suction-type injector according to the present invention in which the container to be injected and the injection cylinder can be separated, even if only the injection cylinder is reduced in size, specifically less than 30 ml, It can be said that the injection container does not necessarily need to be miniaturized. However, the gas cylinders of the conventional suction type injector are all larger than the liquid container to be injected, and are 30 ml or more. In this case, it cannot be said that the characteristics of the suction-type injection container are utilized for the environmental performance and safety, and the problem remains.

JP-A-10-305243 JP-A-11-169759 (FIG. 3) No. 7-53734

In the present invention, by proposing the capacity of the injection cylinder and the liquid container to be injected in a specific ratio, the characteristics of the suction type injector can be fully utilized, and the use of the injection gas is unnecessary. Preventing radiation and minimizing the impact on the environment, reducing the risk of explosions, ensuring high social safety, and safety without the need to legally handle hazardous materials or high-pressure gas A simple suction injector.
Another object of the present invention is to make the injection cylinder and the liquid container to be injected detachable, so that even if either the injection gas or the liquid to be injected is left, a new one is attached. Therefore, it is an object of the present invention to provide a suction type injector that can be continuously used and prevents waste of resources. At that time, by setting the shape and structure of the detachable part to a specific one, erroneous mounting is also prevented.
Still another object of the present invention is to provide a suction-type injector capable of obtaining a fine atomized state of a liquid to be injected.
Still another object of the present invention is to prevent a liquid leakage from the liquid container to be ejected during transportation and the like, and in the spraying operation, good spraying can be performed only by an operation such as pressing of the operation unit. The object is to provide a possible suction injector.

The invention according to a first aspect of the present invention, the suction type injector, the internal volume of the injection fluid container and VLml, the internal volume of the injection cylinder when the VGML, at VG / VL = 0.05 to 0.30 The injection liquid container includes a container for an injection cylinder adjacent to the mouth, the container includes a bottom space that can stably support and store the injection cylinder, and the cylinder connection part includes The cylinder has a special fitting part that can easily and correctly accommodate the cylinder adapter, and the injection cylinder is equipped with a cylinder adapter that fits exactly with this fitting part as a shoulder cover. Provided is a suction type injector having a mechanism that can guarantee its use .
The invention according to claim 2 of the present invention, in the suction-type injector, the internal volume of the injection fluid container and VLml, the internal volume of the injection cylinder when the VGML, at VG / VL = 0.05 to 0.30 And an injection mechanism portion in the injector is provided at an injection button fitted to a stem provided at the top of the injection cylinder, a gas flow path provided in the injection button, and a tip of the gas flow path. A venturi stenosis part having a diameter smaller than that of the gas channel, a mixing suction chamber having a diameter larger than that of the venturi stenosis part, and an expansion chamber provided at the tip of the suction mixing chamber. The expansion chamber communicates with the suction mixing chamber via the expansion chamber inlet, and the expansion chamber inlet is smaller than the suction mixing chamber and smaller than the expansion chamber, and the expansion chamber has an expansion chamber outlet at the tip thereof. Open to the outside The ejection liquid conducting path that communicates with the liquid container to be ejected communicates with the suction mixing chamber, and when the ejection gas from the gas flow path is discharged outward through the expansion chamber outlet, A negative pressure is generated by the Venturi effect, and the liquid to be injected in the liquid container to be injected rises due to suction by the generated negative pressure, and is mixed with the injection gas in the suction mixing chamber and expands with a diameter larger than the diameter of the venturi constriction There is provided a suction type injector which is atomized by receiving gas expansion at a chamber inlet, and further sprayed to the outside by obtaining an atomizing effect in an expansion chamber having a larger diameter .
The invention according to claim 3 of the present application provides the suction type injector according to claim 1 or 2 , wherein the VG satisfies VG <30 ml.
The invention according to claim 4 of the present application includes an injection mechanism portion, an injection cylinder connected to the injection mechanism portion, and an injection liquid container connected to the injection mechanism portion separately from the injection cylinder, Is a suction-type injector that sucks and injects the liquid to be injected from the liquid container by injecting the gas in the injection cylinder, and the above-mentioned injection mechanism is arranged at the upper end of the liquid container to be injected, The injection mechanism section has a detachable cylinder connection section with respect to the injection cylinder and a detachable container connection section with respect to the liquid container to be injected at the lower part thereof, and the liquid container to be injected is a mouth provided at the upper end thereof. A suction pipe supported by the container connecting portion and provided in the injection mechanism portion is inserted into the mouth of the liquid container to be injected, thereby setting a flow path from the injection container to the injection mechanism portion. claim 1, characterized in that 3 provides a suction-type injector according to any one of.
In the invention according to claim 5 of the present application, a narrow guide chamber is provided at the tip of the conduction path for the liquid to be jetted, and the liquid to be jetted through the narrow guide chamber is introduced into a suction and mixing chamber wider than the guide chamber. The suction type injector according to claim 2 , wherein the suction type injector is provided.
In the invention according to claim 6 of the present application, the liquid to be injected is an aqueous, alcohol-based, solvent-based, or fatty acid-based liquid containing an active ingredient according to the product purpose, and has a viscosity range of 1 cp to 100 cp. The suction type injector according to any one of claims 1 to 5 , which uses a product.
In the invention according to claim 7 of the present application, the gas accommodated in the injection cylinder is a single liquefied gas such as dimethyl ether or HFC-152a, a compressed gas such as nitrogen, oxygen, carbon dioxide or nitrous oxide, or an azeotrope. the mixture was used, the manner two or more components of the gas composition in the vapor phase and liquid phase in the injection does not change, according to claim 1, wherein it is so as not change when the injection condition of the injector A suction injector according to any one of the above is provided.
In the invention according to claim 8 of the present application, the injection cylinder includes a stem having an injection port, and an on-off valve that opens when pressed against the stem, and the injection mechanism section includes a cylinder connection section connected to the stem of the injection cylinder. A container connecting portion connected to the liquid storage chamber, and an operation portion that allows a person to perform an operation for injection, and an opening / closing valve is provided in the container connecting portion. The suction type injector according to any one of claims 1 to 7 , wherein the opening and closing valve of the liquid connection portion is opened and the stem is pressed.

According to the present invention, in the suction type injector, when the internal volume of the liquid container to be injected is VLml and the internal volume of the injection cylinder is VGml, VG / VL = 0.05 to 0.30. It is possible to provide a suction-type injector that prevents unnecessary emission and has a high social security.
In the invention according to claim 1, the above-described liquid container to be ejected is provided with an accommodating portion of the injection cylinder next to the mouth portion, and this accommodating portion can stably support and accommodate the injection cylinder. It has a bottom space, and the above-mentioned cylinder connecting part has a special fitting part that can easily and correctly accommodate the cylinder adapter, and the injection cylinder has a shoulder cover for the cylinder adapter that fits precisely into this fitting part. It was possible to have a mechanism that can guarantee the use of only a dedicated cylinder.
Moreover, the invention which concerns on Claim 2 of this application can provide the suction type injector which can inject the fine mist with the favorable atomization state of the to-be-injected liquid.
In particular, when the internal volume VG of the liquid container to be ejected is less than 30 ml , the risk of explosion can be reduced. This is clear from the fact that it is not legally required to be labeled as dangerous goods or high-pressure gas, and it can be said that safety is legally ensured. Therefore, the present invention has been able to provide a suction type injector that is well considered in the environment, takes into account social safety and security measures, and is excellent in safety in daily life.
Furthermore, by making the injection cylinder and the liquid container to be injected detachable, even if either the injection gas or the liquid to be injected remains, it can be used continuously by installing a new one. And wasteful use of resources. At that time, by setting the shape and structure of the detachable part to a specific one, it is possible to prevent erroneous mounting.
Furthermore, the invention according to claim 8 of the present application, in addition to the above-mentioned effect, can effectively prevent liquid leakage from the liquid container to be ejected during transportation, etc. Thus, it is possible to provide a suction type injector capable of good spraying only by this operation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a suction type injector according to an embodiment of the present invention. 2 is a plan view of the suction type injector, FIG. 3 is a cross-sectional view showing a state in which an injection cylinder of the suction type injector is mounted, and FIG. 4 is an enlarged view of a main part of the suction type injector. It is.

  This injector includes an injection liquid container 11, an injection cylinder 21, and an injection mechanism unit 30 provided at the upper ends of both 11 and 12.

  First, the injection cylinder 21 will contain an injection gas. Examples of the gas include liquefied gases such as DME, LPG, and fluorinated hydrocarbons, nitrogen, carbon dioxide, laughing gas, air, and the like. One kind of compressed gas or a mixture of two or more kinds can be used. Here, pay attention to the following points when mixing. That is, when the mixture of two liquids having different boiling points is an ideal solution, the vapor composition and the solution composition are different, and the boiling point changes as distillation proceeds. However, in the case of deviating from the ideal solution, a vapor having the same composition is distilled out at a certain solution composition, and the boiling point does not change. The solution at that time is called an azeotrope or azeotrope, and it is desirable to use such an azeotrope. Specifically, the following (1) to (8) can be exemplified. (1) HFC-152a / propane = 45/55 (w / w) (2) HFC-152a / isobutane = 70/30 (w / w) (3) HFC-152a / DME = 32/68 (w / w) ) (4) Isobutane / HFC-152a = 25/75 (w / w) (5) A-80 / DME = 80/20 (w / w) (6) A-17 / HFC-152a = 15/85 ( (w / w) (7) A-31 / HFC-152a = 25/75 (w / w) (8) A-31 / DME = 40/60 (w / w).

  The internal pressure of the injection cylinder 21 may be a general pressure as an aerosol product or a compressed gas having a higher pressure than that, and the injection target liquid in the injection target liquid container 11 is sucked and injected by the injection. If it can do, the kind and pressure are not ask | required. Further, the injection cylinder 21 can also store a liquid to be injected such as a chemical liquid in combination with the injection gas. The liquid to be injected stored in the injection cylinder 21 can be appropriately selected and used on condition that it can be stored in the cylinder together with the injection gas and is injected from the injection cylinder together with the injection gas. The same liquid as the liquid to be injected stored in the liquid container 11 to be described later can be used. More specifically, as an example of use, one of the two-component drugs (such as a heat generating agent, a paint, an adhesive, and a hair dye) is stored in the injection cylinder 21 and the other is stored in the liquid container 11 to be injected. it can.

  The internal volume of the injection cylinder 21 may be set as appropriate. However, from the balance of the volume of the liquid to be injected and the volume of the injection gas unit, the ease of attachment and removal, the simplicity of use of the product, and the safety, The volume VG is preferably less than 30 ml. In particular, if the injection cylinder satisfies this condition, even if all the injection gas in the injection cylinder 21 is released into a 4 tatami mat room, there is no risk of explosion, which is preferable from the viewpoint of social safety. Become. On the other hand, since it is not preferable that the entire amount is discharged quickly, it is desirable that the volume VG of the injection cylinder be 15 ml or more.

  The injection cylinder 21 is a bottomed cylindrical cylinder having a stem 22 at its upper end, and an injection port (not shown) communicating with the inside of the injection cylinder 21 is formed at the upper end of the stem 22. The injection cylinder 21 is provided with an on-off valve (not shown) that is opened by pressing (pressing down or tilting) the stem 22, and the valve is opened by pushing down or tilting the stem 22, and the internal gas Is ejected from the ejection port of the stem 22. The material of the injection cylinder 21 can be selected from materials such as metal and synthetic resin depending on the pressure of the gas inside.

  In the case where liquefied gas is used as the gas, the injection cylinder 21 is preferably implemented as a gas storage chamber in the cylinder provided with a porous member (not shown). This porous member is arranged in a position (for example, the bottom) where at least a part of the porous member is immersed in the liquid portion of the liquefied gas in the gas storage chamber of the injection cylinder 21. Specifically, it is desirable to arrange the injection cylinder 21 over substantially the entire length in the vertical direction, and it is attached to the inner surface of the container or attached to a dip tube (not shown) communicating with the stem 22. Alternatively, it may simply be provided independently inside the cylinder. Moreover, about what does not plan inversion, you may provide only in a bottom part. For the porous material, foamed urethane such as sponge, foamed polyethylene, porous ceramic, sintered material represented by porous plastic (porous polypropylene, porous polyethylene), non-woven fabric, boiling stone such as zeolite are used. can do. When using a relatively small injection cylinder as compared with the internal volume of the liquid container to be injected as in the present invention, the vaporization of the liquefied portion is not in time for the injection of the vaporized gas, and the injection momentum is immediately attenuated. However, by using a porous member, the vaporization of the liquefied gas is promoted, and the momentum of injection is attenuated even when continuously injected. Can be prevented.

  Next, the liquid container 11 to be injected is a container for storing the liquid to be injected that is sucked as the above-described injection gas is injected. Examples of the liquid to be injected include liquid daily products such as fragrances, deodorants, and cleaning agents, cosmetics, pharmaceuticals, paints, inks, alcohol, water, and other liquid fluids, as well as nylon powder. It is possible to store liquids such as powder made of synthetic resin, fine powders such as silica, hollow spheres such as shirasu balloons, porous bodies, etc. Are collectively referred to as a liquid to be jetted. More preferably, the liquid to be jetted is a liquid in which water, alcohol, solvent, fatty acid or the like is mixed with an active ingredient according to the purpose of the product, and one having a viscosity range of 1 cp to 20 cp is used. Even if it is outside this range, it is not impossible to use, but by using a liquid that satisfies this condition, it is possible to obtain a clean and fine good mist when jetted. In the following description, as a general rule, a case where a liquid that can be atomized is used as the liquid to be ejected will be described.

  When the internal volume of the liquid container 11 to be injected is VLml and the internal volume of the injection cylinder 21 is VGml, VG / VL = 0.05 to 0.30. In this way, by making the inner volume of the injection cylinder 21 sufficiently smaller than that of the liquid container 11 to be injected, an unnecessary discharge of the injection gas can be prevented and a suction type injector with a high social sense of security. Can provide. In particular, as described above, in the case of using one having a viscosity range of 1 cp to 20 cp, by setting VG / VL = 0.05 to 0.30, an amount equal to that all the liquid to be jetted can be sucked and jetted (completely The amount of the injection gas exceeds the required discharge amount x) and can be within a range that does not exceed twice the complete discharge required amount x. It is possible to prevent wasteful emission of the injected gas.

  Next, the liquid container 11 to be ejected has a generally bottomed cylindrical shape and is provided with a mouth portion 12 at the upper end thereof. The mouth portion 12 is liquid-tightly closed when the ejection mechanism portion 30 is attached. It is. In this example, a male screw is provided on the outer periphery of the mouth portion 12 and is detachably connected to the injection mechanism portion 30. In this case, packing may be provided in order to maintain liquid tightness. The liquid container 11 is not required to have pressure resistance, and can be appropriately selected and used on the condition that it is liquid-tight, such as a metal or a synthetic resin.

  The liquid container 11 to be ejected includes an accommodating portion 13 for an injection cylinder 21 adjacent to the mouth portion 12 thereof. The accommodating portion 13 includes a bottom space 14 that can stably support and accommodate the injection cylinder 21. The bottom space 14 is formed in the middle of the liquid container 11 to be injected, and supports the bottom of the injection cylinder 21. The injection cylinder 21 is erected on the bottom space 14. In addition, the gripping portions 15 are provided on both the left and right sides of the bottom space 14 in order to support the injection cylinder 21 more stably and to hold a suction-type injector. The grip portion 15 is configured to support the outer peripheral portion of the injection cylinder 21 from the left and right sides on the inner side and to be easily gripped by a person on the outer side.

This injection mechanism part 30 has a support part 31 at its lower part. The support portion 31 includes a container support portion 31 a that can be attached to and detached from the liquid container 11 and a cylinder support portion 31 b that can be attached to and detached from the injection cylinder 21.
The container support portion 31 is formed with a female screw 32 that is screwed into the screw of the mouth portion 12 of the liquid container 11 to be ejected, whereby the liquid container 11 is supported by the container 12 at the upper end mouth portion 12. Supported by the portion 31. Then, the dip tube 33 provided in the ejection mechanism section 30 is inserted into the mouth portion 12 of the ejection liquid container 11 so that a flow path from the ejection liquid container 11 to the ejection mechanism section 30 is set. .
A cylinder support part 31 b is provided beside the container support part 31. The cylinder support portion 31 b is a fitting portion that extends on both the front and rear sides of the injection cylinder 21. On the other hand, the injection cylinder 21 is equipped with a cylinder adapter 23 that fits precisely as a shoulder cover. That is, the inner surface side shape of the cylinder support portion (insertion portion) 31b and the outer peripheral shape of the cylinder adapter 23 are substantially the same shape (a shape that fits without a gap). The use can be secured.

  The ejection mechanism unit 30 includes an operation unit 35 that allows a person to perform an operation for ejection, and an ejection button 36 that performs a motion for ejection based on this operation. In this example, the operation part 35 is provided in the upper part of the injection button 36, and if the operation part 35 is pressed down, the injection button 36 will be pushed down. The injection button 36 includes a stem connection portion 40 that is fitted to the stem 22 of the injection cylinder 21 at a lower portion thereof. When the injection button 36 is lowered, the stem 22 fitted to the stem connection portion 40 is pushed downward, the on-off valve inside the injection cylinder 21 is opened, the injection gas is discharged, and flows into the stem connection portion 40. . The stem connecting portion 40 is continuous with a gas flow path 40a extending forward, and an injection member 41 is attached to the tip of the gas flow path 40a.

As shown in FIG. 4, the injection member 41 includes a nozzle insert 4 a and an insert ring 4 b, which are attached to the tip hole of the injection button 36.
A nozzle insert 4a is disposed at the tip of the gas flow path 40a. The nozzle insert 4a is also provided with a gas flow path 42a from the proximal end to the distal end, and a venturi constriction portion 42 having a smaller diameter is formed at the distal end. A suction mixing chamber 43 having a diameter larger than that of the venturi constriction 42 is formed at the tip of the venturi constriction 42. The mixed suction chamber 43 is a space between the tapered tip end surface of the nozzle insert 4a and the tapered wall surface having a reduced diameter of the insert ring 4b. It is desirable that both taper shapes be substantially parallel.
The tip of the suction mixing chamber 43 communicates with the expansion chamber 44. The expansion chamber 44 communicates with the suction mixing chamber 43 via an expansion chamber inlet 44a. The expansion chamber inlet 44a is smaller than the suction mixing chamber 43 and smaller than the expansion chamber 44. Is open to the outside at the expansion chamber outlet 44b at the tip.

The leading end of the guide chamber 43a is electrically connected to the suction mixing chamber 43 via the jetted liquid outlet 43b. The guide chamber 43 a is a space between the outer periphery of the insert ring 4 b and the inner peripheral surface of the tip hole of the injection button 36, and is formed outside the gas flow path 42 a toward the rear from the venturi constricted portion 42. This guide chamber 43a is provided in an annular shape at the tip of the jetted liquid conducting path 45 extending in the vertical direction (vertical direction), and the axial direction of the jetted liquid conducting path 45 and the annular guide chamber 43a Is substantially orthogonal to the axial direction.
The liquid to be ejected which has flowed into the guide chamber 43a from the guide chamber inlet 43c at the upper end of the conduction path 45 for the liquid to be ejected collides with a collision portion (the outer peripheral wall of the nozzle insert 4a) which is the wall surface of the guide chamber 43a. Advancing in the tip direction through 43a, it flows into the suction mixing chamber 43 from the jetted liquid outlet 43b.
At this time, since the radial width of the annular guide chamber 43a is narrower and narrower than the radius of the suction mixing chamber 43, the flow rate of the liquid to be injected passing through the guide chamber 43a is higher than that in the conduction path 45 for the liquid to be injected. Will also be faster. Thereby, since the liquid to be ejected flows into the suction mixing chamber 43 in a state where the atomization and dispersion are advanced, good mixing is realized.
Further, as described above, by making the mixed suction chamber 43 a tapered space whose diameter gradually decreases toward the tip, the liquid to be injected flows naturally toward the expansion chamber inlet 44a at the tip, Mixing and primary expansion are performed at the expansion chamber inlet 44a, and secondary expansion is performed in the expansion chamber 44 having a larger diameter.

With the above configuration, when the injection button 36 is lowered by the operation of the operation unit 35, the injection gas of the injection cylinder 21 is discharged from the injection hole of the stem 22 and passes through the stem connection part 40, the gas flow path 40a, the injection member 41, It ejects from the expansion chamber outlet 44b.
At this time, a negative pressure is generated by the venturi effect of the venturi constriction portion 42, and the liquid to be injected in the injection liquid container 11 is sucked and raised in the dip tube 33 in the container by the generated negative pressure, and the guide chamber It flows into the suction mixing chamber 43 through 43a. In the suction mixing chamber 43, the liquid to be ejected is guided by the taper on the truncated cone provided at the outlet of the nozzle insert 4a and the opposing taper provided at the corresponding location in the insert ring 4b, and the venturi constriction portion It mixes with the gas which flows out from 42 and flows. Then, the gas is expanded and atomized by the expansion chamber inlet 44a having a larger diameter than the diameter of the venturi constriction portion 42, and further atomized by the expansion chamber 44 having a larger diameter, and is sprayed to the outside.

Next, the operation and structure from when the liquid to be injected reaches the suction mixing chamber 43 through the dip tube 33 from the liquid container 11 to be injected will be described.
In order to continuously perform the suction by the venturi, it is necessary to maintain the inside of the liquid container 11 to be atmospheric pressure. Therefore, the liquid container 11 to be ejected requires an air passage for introducing atmospheric pressure, and the air passage needs to be closed at all times in order to prevent liquid leakage during transportation and transportation.
In addition, in order to prevent liquid leakage during transportation and transportation, in order to prevent the liquid to be injected from leaking from the liquid container 11 to be injected through the dip tube 33 and from the expansion chamber outlet 44b, the path is always closed. In addition, it is necessary to open this path during suction and discharge.
Thus, according to this suction injector, it is necessary to open and close the air passage and open and close the liquid passage. For this reason, a check valve for opening and closing the air passage may be provided at an appropriate position of the liquid container 11 to be injected, but in this example, the following configuration is adopted so as to be performed simultaneously with opening and closing of the liquid passage.

The above-described injectable liquid conducting path 45 is connected to a dip tube 33 inserted into the injectable liquid container 11 through a cylindrical connection chamber 147 provided in the container support portion 31a.
The structure of the connection chamber 147 will be described based on the enlarged view of the main part of the connection chamber 147 shown in FIGS. In this example, the connection chamber 147 includes an upper connection chamber 147a and a lower connection chamber 147b. However, the two can be manufactured without distinction, and the upper portion 147a and the lower portion 147b are separated only when necessary. It explains separately. The dip tube 33 is connected to the lower end of the connection chamber 147 (connection chamber lower portion 147b).

  The lower end of the ejection liquid conducting path 45 is slidably inserted into the connection chamber 147. An opening / closing valve 146 is provided at the lower end of the injecting liquid conducting path 45, and an inside / outside passage 149 for conducting the inside and outside of the injecting liquid conducting path 45 is provided above the opening / closing valve 146. When the opening / closing valve 146 moves downward from the valve seat 148 provided in the connection chamber 147 (connection chamber lower portion 147b) as the operation portion 35 (injection button 40) is depressed, the inner / outer passage 49 is opened. Through this, the ejection liquid conduction path 45 and the ejection liquid container 11 are electrically connected, and the ejection of the ejection liquid becomes possible. On the other hand, when the injection button 40 is raised, the valve is closed and the liquid in the liquid container 11 to be injected does not leak outside.

  On the other hand, with respect to the flow of air, a gap 151 between the cylinder-shaped connection chamber 147 and the conduction liquid passage 45 serves as an air intake port from the outside. Air from the outside passes through the gap 151 and communicates with the liquid container 11 to be ejected through a longitudinal passage 152 provided penetrating downward from the inside of the connection chamber 147. An air opening / closing valve 156 is provided above the inner and outer passages 149. Normally, the air opening / closing valve 156 is in close contact with the air valve seat 158 provided in the connection chamber 147 (the connection chamber upper portion 147a), and the gap 151, the vertical passage 152, and the inside of the connection chamber 147 are shut off. The liquid container 11 to be ejected is closed in an airtight state. Only when the operation unit 35 is pushed down, the air opening / closing valve 156 is separated from the air valve seat 158, and the liquid container 11 to be ejected is electrically connected to the outside through the vertical passage 152 and the gap 151.

  Note that a seal portion 153 is provided above the inner and outer passages 149 in the ejection liquid conduction path 45, and the seal section 153 is connected to the connection chamber 147 even during sliding of the ejection liquid conduction path 45. Therefore, the air passage and the liquid passage are reliably separated from each other.

  When a person removes his / her hand from the operation unit 35, the operation unit 35 is returned to the upper position by an urging means (not shown) in the injection cylinder 21 urging the stem 22 upward, and the injection gas is injected. While being stopped, the valve is closed as described above, and the liquid to be ejected returns to a liquid-tight and air-tight state, so that the liquid in the liquid 11 to be ejected does not leak during transportation.

  In this example, the operation unit 35 is pushed down. However, the operation unit 35 may be changed as appropriate, such as a side pushing or a lifting one. Further, the detailed structure of the injection mechanism can be implemented by appropriately changing the condition that the liquid to be injected can be injected as the injection gas is injected, such as the structure of a conventional suction injector. As described above, the upper ends of the injection cylinder 21 and the liquid container 11 to be injected reach the upper part of the liquid container 11 to be injected. A mechanism for opening and closing the valves of both the conduction path 45 and the air opening / closing section 50 can be realized with a simple structure.

  Further, the injection mechanism unit 30, the liquid container 11 and the injection cylinder 21 may be fixed so as not to be removable by the consumer, but the injection cylinder 21 may be replaceable by making it removable. The liquid to be ejected may be additionally used in the liquid container 11 to be ejected. Further, when discarding, the injection cylinder 21 can be taken out, the residual gas can be treated by the above-described method, and then discarded separately. In addition, although the to-be-injected liquid container 11 is implemented as one chamber, it can divide | segment into a radial direction etc. and can provide two or more chambers. In this case, there are a plurality of liquid passages for the liquid to be jetted, and plural kinds of liquids to be jetted may be joined at the merging portion 43 or in front of the merging section 43. It is also possible to selectively use the type of liquid to be ejected.

Next, another embodiment will be described with reference to FIGS. This example shows a new attachment / detachment structure between the injection cylinder 21 and the injection mechanism section 30, and the injection cylinder 21 side includes not only the stem 22 but also a part of the gas flow path 40a. is there. Specifically, a connection block 22a is provided on the stem 22, and a gas flow path 40a is formed in the connection block 22a. On the other hand, the portion corresponding to the connection block 22a is made hollow in the injection button 36, and the connection block 22a is mounted in this cavity in use. Moreover, as shown in FIG. 10, you may make it sell by providing the cap 22b which protects the connection block 22a.
In the example of FIG. 7, the operation unit 35 is arranged so as to be pivotable up and down by a hinge 35 a, and the injection mechanism unit 30 is pushed downward by grasping the lever 35 b extended forward. I am trying to do it.

  FIG. 11 shows a structure in which the injection cylinder 21 is accommodated inside the injection liquid container 11, and the mouth portion 12 of the injection liquid container 11 has a size through which the injection cylinder 21 passes. And the cap 12a which closes this opening part 12 is made into the container support part 31a, and the cylinder support part 31b with respect to the injection cylinder 21 is provided in this cap 12a. The injection cylinder 21 may be directly stored in the liquid container 11 to be injected. However, the storage part of the injection cylinder 21 and the storage chamber of the liquid to be injected are separated by using the liquid container 11 as an inner and outer double container. You may make it do.

  Next, in order to enhance the understanding of the present invention, examples thereof will be shown. However, the present invention should not be construed as being limited to these examples.

  The suction type injector shown in FIGS. 1 to 6 was subjected to an injection test for 10 seconds using the stock solution shown in Table 1. Dimethyl ether was used as the propellant gas. The results are shown in Table 2. Similarly, a 10-second injection test was conducted with the stock solution shown in Table 3. SH200c in Table 3 is silicon oil. Abbreviation for centistokesk. Dimethyl ether was used as the propellant gas. The results are shown in Table 4.

As a result of this test, when the liquid to be injected has a viscosity range of 1 cp to 20 cp, when the internal volume of the liquid container to be injected is VLml and the internal volume of the injection cylinder is VGml in the suction type injector, VG / VL It was confirmed that all the liquid to be injected in one liquid container to be injected can be sucked and injected by one injection gas cylinder on the condition that = 0.05 to 0.30 is satisfied.

It is sectional drawing of the suction type injector which concerns on embodiment of this invention. It is a top view of the suction type injector. It is sectional drawing which shows the state which mounts | wears with the injection cylinder of the suction type injector. It is a principal part enlarged view of the suction type injector. It is principal part sectional drawing which shows the connection chamber of the suction type injector. It is explanatory drawing of the operation state of the connection chamber of FIG. It is sectional drawing of the suction type injector which concerns on other embodiment of this invention. It is a top view of the suction type injector. It is sectional drawing which shows the state which removed the injection cylinder of the suction type injector. (A) is a side view of the injection cylinder of the suction type injector, and (B) is a side view of the cylinder with its cap removed. It is sectional drawing of the suction type injector which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Liquid container 11 Mouth part 12 Storage part 21 Injection cylinder 30 Injection mechanism part 31 Support part 41 Injection member

Claims (8)

In the suction type injector, when the internal volume of the liquid container to be injected is VLml and the internal volume of the injection cylinder is VGml,
VG / VL = 0.05-0.30
And
The above-mentioned liquid container to be sprayed is provided with a storage part for the injection cylinder next to the mouth part, and this storage part is provided with a bottom space capable of stably supporting and storing the injection cylinder,
The above cylinder connecting part has a special fitting part that can easily and correctly accommodate the cylinder adapter,
The injection cylinder is a suction type injector that has a mechanism that can secure the use of a dedicated cylinder only by installing a cylinder adapter that fits precisely into the fitting section as a shoulder cover . In the suction type injector, when the internal volume of the liquid container to be injected is VLml and the internal volume of the injection cylinder is VGml,
VG / VL = 0.05-0.30
And
The injection mechanism portion in the injector includes an injection button that fits to a stem provided at the top of the injection cylinder,
A gas flow path provided in the injection button;
A venturi constriction provided at the tip of the gas flow path and having a smaller diameter than the gas flow path;
A mixed suction chamber provided at the tip of the venturi stenosis and having a diameter larger than that of the venturi stenosis;
An expansion chamber provided at the tip of the suction mixing chamber,
The expansion chamber communicates with the suction mixing chamber via the expansion chamber inlet. The expansion chamber inlet is smaller than the suction mixing chamber and smaller than the expansion chamber. The expansion chamber is the expansion chamber outlet at the tip thereof. Open to the outside,
The ejection liquid conduction path communicating with the liquid container to be ejected communicates with the suction mixing chamber.
When the injection gas from the gas flow path is discharged to the outside through the expansion chamber outlet, a negative pressure is generated due to the venturi effect, and the injection target liquid in the injection target liquid container is aspirated by the generated negative pressure. Ascended and mixed with the jet gas in the suction mixing chamber, atomized by expansion of the gas at the inlet of the expansion chamber having a larger diameter than the venturi constriction diameter, and further atomized in the expansion chamber having a larger diameter to the outside A suction-type injector characterized by being injected. 3. The suction type injector according to claim 1 , wherein the VG satisfies VG <30 ml. An injection mechanism unit, an injection cylinder connected to the injection mechanism unit, and an injection liquid container connected to the injection mechanism unit separately from the injection cylinder, the injection mechanism unit ejecting gas from the injection cylinder In the suction-type injector that sucks and jets the liquid to be jetted in the liquid container to be jetted,
The above injection mechanism is arranged at the upper end of the liquid container to be injected,
The injection mechanism part has a detachable cylinder connection part with respect to the injection cylinder and a detachable container connection part with respect to the liquid container to be injected in the lower part thereof,
The liquid container to be ejected is supported by the container connecting portion at the mouth portion provided at the upper end thereof,
The suction pipe provided in the jetting mechanism section is inserted into the mouth of the jetted liquid container, whereby a flow path from the jetted container to the jetting mechanism section is set. The suction type injector according to any one of 1 to 3 . A narrow guide chamber provided at the tip of the injection liquid for the conductive paths, the claims target liquid which has passed through the narrow guiding chamber, characterized in that it is intended to be introduced into a wide suction mixing chamber from the guide chamber 2. The suction type injector according to 2 . The liquid to be ejected is a non-hazardous material having a viscosity range of 1 cp to 100 cp, in which an active ingredient according to the product purpose is blended with a liquid such as water, alcohol, solvent, or fatty acid . The suction type injector according to any one of 5 . The gas contained in the injection cylinder is a liquefied gas such as dimethyl ether or HFC-152a, a compressed gas such as nitrogen, oxygen, carbon dioxide or nitrous oxide, or an azeotropic mixture, and the vapor phase during injection The suction type injector according to any one of claims 1 to 6 , wherein a gas composition of two or more components in the inside and the liquid phase is not changed, and an injection state of the injector is not changed. The injection cylinder includes a stem having an injection port, and an on-off valve that opens when pressed against the stem,
The injection mechanism unit includes a cylinder connection unit connected to the stem of the injection cylinder, a container connection unit connected to the liquid storage chamber, and an operation unit that allows a person to perform an injection operation. off valve is provided in the connecting portion, by operating the operation unit, according to any one of claims 1 to 7, characterized in that to press the stem opens the closing valve of the connection portion target liquid Suction type injector.

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