JPH07149399A - Liquid injector - Google Patents

Abstract

PURPOSE:To eliminate a problem such as a variation in an amount of injected liquid, by providing a liquid injection control valve inside a liquid storage container, the lower end of the liquid injection control valve being capable of fitting inside the wall of the part where the liquid storage container communicates with a liquid injection nozzle, and by actuating the control valve by an actuator. CONSTITUTION:With a hollow valve (liquid injection control valve) 3 closed a pump 7 is driven and controlled, and pressure is produced so that the inside of a syringe as a liquid storage container maintains constant pressure. Then, by energizing the coil 4B of an electromagnet 4 from a power source 11, control is exerted so that the hollow valve 3 is opened. Consequently, the periphery of the lower end of the hollow valve 3 is soaked in a liquid, therefore the flow of air in an air passage 3C stops and the liquid in the syringe 1 is forced out toward a liquid injection nozzle 2. When the energization of the coil 4B is stopped and the hollow valve 3 is closed, a portion of the air sent into the syringe 1 flows into the air passage 3C of the hollow valve 3, so that the remaining liquid in the nozzle 2 is jetted out and injected into a container 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid injection device,
In particular, the present invention relates to a liquid injection device suitable for injecting a predetermined amount of a liquid such as a reagent used in a medical inspection device, an industrial paint, an adhesive, a caulking material into a predetermined liquid injection target container.

[0002]

2. Description of the Related Art Conventionally, for example, a basic structure of a liquid injection device (dispenser) for injecting a predetermined amount of liquid into a liquid injection target container is shown in FIG. The dispenser of FIG. 5 is configured to include a syringe 51 integrally provided with a liquid injection nozzle 50 at the lower end, and a pump 53 for sending air into the interior of the syringe 51 via a conduit 52. When the pump 53 is driven to send air into the syringe 51, the liquid W inside the syringe 51 is pushed out by pressure and injected into the inside of the liquid injection target container 54 from the liquid injection nozzle 50. Reference numeral 55 in the figure denotes a support mechanism that supports the syringe 51.

In the liquid injection apparatus of FIG. 5, the discharge amount V of the liquid discharged from the liquid injection nozzle 50 is proportional to the pressure P inside the syringe 51 (see FIG. 6: constant discharge time t).
And proportional to the discharge time t (see FIG. 7: constant pressure P)
Therefore, the discharge amount V of the liquid is set to the pressure P inside the syringe 51.
Assuming that the time integration is performed, the liquid discharge amount V is controlled by controlling the pressure P inside the syringe 51 and the discharge time t with a controller (not shown).

On the other hand, as shown in FIG. 8, for example, a syringe 61 integrally provided with a liquid injection nozzle 60 at the lower end,
A needle valve 62 provided inside the syringe 61, an actuator 63 that operates the needle valve 62, and a pump 67 that sends air into the inside of the syringe 61 via a pipe line 64, a constant pressure mechanism 65, and a pipe line 66. There is a liquid injection device. In the liquid injection device, the needle valve 62 is closed and the inside of the syringe 61 is pressurized to a constant pressure by the constant pressure mechanism 65, and the needle valve 62 is appropriately opened and closed (see FIGS. 9A to 9C). The ejection time of the liquid ejected from the liquid injection nozzle 60 into the liquid injection target container 68 is controlled. Reference numeral 69 in the figure is a syringe 6.
The support mechanism which supports 1 is shown.

[0005]

However, the above-mentioned prior art has the following problems. In the liquid injection device shown in FIG. 5, it generally takes time to raise the pressure inside the syringe to a certain pressure after starting the pump as shown in FIG. There was a problem that it was difficult to control. Further, in the liquid injection device with a needle valve shown in FIG. 8, in order to control the discharge amount from the liquid injection nozzle by opening and closing the needle valve with the inside of the syringe pressurized to a constant pressure, A constant pressure mechanism must be installed separately, which causes a problem that the entire liquid injection device becomes large.

Further, in any of the liquid injecting apparatus shown in FIGS. 5 and 8, after the liquid is ejected from the liquid injecting nozzle,
As shown in FIG. 11 (a), the liquid remains up to the lower end portion of the liquid injection nozzle, or as shown in FIG. 11 (b), air bubbles K are mixed in the liquid inside the liquid injection nozzle. As shown in the drawing, since a phenomenon such as the drop S of the liquid S from the lower end of the liquid injection nozzle is likely to occur, there is a problem that the amount of liquid discharged from the liquid injection nozzle varies.

[0007]

It is an object of the present invention to improve the disadvantages of the above-mentioned conventional examples, and in particular, to prevent the liquid from remaining inside the liquid injection nozzle to eliminate the variation in the liquid injection amount, and to prevent the liquid injection amount from the liquid injection nozzle. It is an object of the present invention to provide a liquid injecting device that enables accurate control of the device, and further achieves downsizing of the entire device.

[0008]

According to a first aspect of the present invention, there is provided a liquid storage container for storing a liquid to be injected into a predetermined liquid injection target container having an upper opening, and a liquid communicating with a lower end portion of the liquid storage container. A liquid injection device comprising an injection nozzle and a pump for supplying air for pressurizing the inside of the liquid storage container to the liquid storage container, wherein the liquid injection device is provided inside the liquid storage container, and both upper and lower ends thereof are open and a lower end portion thereof is opened. Is a cylindrical liquid injection control valve having a shape that can be fitted to the inner peripheral wall of the communicating portion between the liquid storage container and the liquid injection nozzle, and the liquid injection control valve is connected to the liquid storage container and the liquid injection nozzle. And an actuator that operates so as to be in a fitted state or a non-fitted state with respect to the inner peripheral wall of the communication portion of. This aims to achieve the above-mentioned object.

According to a second aspect of the present invention, a liquid storage container for storing a liquid to be injected into a predetermined liquid injection target container having an upper opening, a liquid injection nozzle communicating with a lower end portion of the liquid storage container, and the liquid A liquid injection device comprising a pump for supplying air for pressurizing the inside of the liquid storage container to the storage container, wherein the liquid storage container is provided inside the liquid storage container, and both upper and lower ends are open and a lower end is the liquid storage container. A cylindrical liquid injection control valve having a shape that can be fitted to an inner peripheral wall of a communication portion with the liquid injection nozzle, and an inner peripheral wall of a communication portion between the liquid storage container and the liquid injection nozzle. An actuator that operates so as to be in a fitted state or a non-fitted state, and a pressure sensor that detects the pressure inside the liquid storage container, and based on the detection data of the pressure sensor, A pressure control function that controls the operation of the pump so that the pressure inside the liquid storage container becomes a constant pressure, and controls the operation of the actuator while the pressure inside the liquid storage container becomes a constant pressure. And a control means having a liquid injection amount control function for controlling the liquid injection control valve so as not to be fitted to the inner peripheral wall of the communicating portion and to be fitted after a predetermined time elapses. It has a configuration of having. This aims to achieve the above-mentioned object.

[0010]

According to the present invention of claim 1, the upper and lower end portions are opened inside the liquid storage container, and the lower end portion can be fitted into the inner peripheral wall of the communicating portion between the liquid storage container and the liquid injection nozzle. A cylindrical liquid injection control valve is provided, and the actuator is used to operate the liquid injection control valve so as to be in a fitted state or a non-fitted state with respect to the inner peripheral wall of the communication portion between the liquid storage container and the liquid injection nozzle. After the liquid is injected into the liquid injection target container while the liquid injection control valve is not fitted to the inner peripheral wall of the communication portion by the actuator, and the liquid injection control valve is fitted to the inner peripheral wall of the communication portion,
The air inside the liquid storage container is sent to the liquid injection nozzle through the hollow part of the liquid injection control valve and pushes out the liquid remaining inside the liquid injection nozzle. It is possible to solve the problem that the liquid remaining inside the liquid injection nozzle at the time of the previous liquid injection falls into the liquid injection target container and the liquid injection amount varies.

According to the second aspect of the present invention, the operation of the pump is controlled on the basis of the detection data of the pressure sensor so that the pressure inside the liquid storage container is kept constant. It is not necessary to separately provide a constant pressure mechanism for maintaining the inside of the container at a constant pressure, and thus the entire liquid injection device can be downsized. Also,
The operation of the actuator is controlled while the pressure inside the liquid storage container is constant, and the liquid injection control valve is disengaged from the inner peripheral wall of the communication part between the liquid storage container and the liquid injection nozzle. In addition to controlling the liquid injection amount based on the pressure inside the liquid storage container and the liquid injection time as in the conventional case, the liquid storage amount is controlled so that the fitting state is achieved after a predetermined time has elapsed. A liquid injection amount corresponding to a time-integrated pressure inside the container can be accurately obtained, and thus the liquid injection amount into the liquid injection target container can be accurately controlled.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

The structure of the liquid injecting device of this embodiment will be described with reference to FIG. 1. The liquid injecting device is a syringe 1 in which a predetermined liquid W is temporarily stored, and a liquid injecting device integrally provided at the lower end of the syringe 1. A nozzle 2, a hollow valve 3 made of a magnetic material such as iron, which is provided inside the syringe 1, an electromagnet 4 as an actuator for opening and closing a hollow valve provided at the upper end of the syringe 1, and a syringe 1. The pressure sensor 5, the pump 7, which is connected to the syringe 1 through the conduit 6, and the control unit 10 and the like, which will be described later, are configured.

The structure of the liquid injection device will be described in detail. The syringe 1 is formed in a shape in which a lower portion of an elongated cylindrical body is formed into a conical body, and the hollow valve 3 is provided at the upper end of the syringe 1.
Engaging portion 1 having a shape to engage with an upper end portion 3A described later of
A is provided. Further, the liquid injection nozzle 2 integrally provided at the lower end of the syringe 1 has a cylindrical shape having an inner diameter slightly smaller than the outer diameter of the hollow valve 3.

The hollow valve 3 is formed of an elongated cylindrical body having openings 3A 'and 3B' formed at the upper end 3A and the lower end 3B, respectively. The upper end 3A of the hollow valve 3 is the same as that of the syringe 1. The hollow valve 3 is formed in a shape that engages with the engagement portion 1A, and the lower end portion 3B of the hollow valve 3 is formed in a shape that engages with the inner peripheral wall 1B of the conical portion of the syringe 1. Also, the hollow valve 3
An air flow passage 3C is formed in the inside of the chamber to allow a part of the air sent from the pump 7 into the syringe 1 to flow to the liquid injection nozzle 2 side.

An electromagnet 4 attached to the upper end of the syringe 1.
Is composed of an iron core 4A and a coil 4B wound around the iron core 4A. The electromagnet 4 generates a magnetic force by energizing the coil 4B from a power supply 11 described later, attracts the hollow valve 3 made of a magnetic material, and the upper end 3A of the hollow valve 3 is attracted.
By engaging with the engaging portion 1A of the syringe 1, the aerial valve 3 is opened. Further, the electromagnet 4 releases the suction of the hollow valve 3 made of a magnetic material by stopping the energization of the coil 4B from a power source 11 to be described later, so that the upper end portion 3A of the hollow valve 3 and the engagement portion 1A of the syringe 1 are separated. By releasing the engagement, the hollow valve 3 is closed.

When the hollow valve 3 is closed, the outer peripheral wall of the lower end portion 3B of the hollow valve 3 is the inner peripheral wall 1B of the conical portion of the syringe 1.
By tightly engaging with, the liquid inside the syringe 1 is prevented from being pushed out to the liquid injection nozzle 2 side. Further, when the hollow valve 3 is opened, the hollow valve 3
By separating the outer peripheral wall of the lower end portion 3B of the syringe 1 from the inner peripheral wall 1B of the conical portion of the syringe 1, the liquid inside the syringe 1 is pushed out to the liquid injection nozzle 2.

The pump 7, which is connected to the syringe 1 through the pipe line 6, sends air into the syringe 1 through the pipe line 6 when it is driven. The pressure sensor 5 attached to the syringe 1 is configured as, for example, a piezoelectric pressure sensor, converts the pressure detected from the inside of the syringe 1 into an electric signal by utilizing the piezoelectric effect, and outputs the electric signal to the control unit 10 described later. It is supposed to do. In the figure, reference numeral 12 indicates a support mechanism that supports the syringe 1 on the base with the cylindrical portion interposed therebetween, and reference numeral 13 indicates a liquid injection target container placed on the base on which the liquid W is injected from the liquid injection nozzle 2. .

Next, the structure of the control system of the liquid injection apparatus of this embodiment will be described with reference to FIG.
A liquid injection controller 10A, a pump drive controller 10B,
It is configured to include a hollow valve drive control unit 10C and a storage unit 10D.

The pressure / liquid injection control unit 10A determines whether or not the inside of the syringe 1 has a preset constant pressure based on an electric signal corresponding to the pressure inside the syringe 1 detected by the pressure sensor 5, which will be described later. The determination is made based on comparison with the set pressure data read from 10D, and a pump drive control command is output to the pump drive control unit 10B.

Further, the pressure / liquid injection control unit 10A stores the opening / closing timing data of the hollow valve 3 during a period in which the pressure inside the syringe 1 is a constant pressure, in the storage unit 10 described later.
The hollow valve opening / closing control command corresponding to the opening / closing timing data is output to the hollow valve drive control unit 10C. Further, the pressure / liquid injection controller 10A
As described later, the discharge amount from the liquid injection nozzle 2 is calculated based on the opening / closing of the hollow valve 3.

The pump drive control unit 10B operates the pump 7 based on the pump drive command from the pressure / liquid injection control unit 10A.
Is controlled so that the pressure inside the syringe 1 becomes a constant pressure. Also,
The hollow valve drive control unit 10C includes a pressure / liquid injection control unit 10
By appropriately controlling the energization / non-energization of the coil 4B of the electromagnet 4 from the power supply 11 based on the hollow valve opening / closing timing command from A, the hollow valve 3 is in the open state during the period when the pressure inside the syringe 1 is a constant pressure. / It is designed to be controlled to be in a closed state.

The storage unit 10D includes a set pressure storage area in which preset pressure data inside the syringe 1 is stored in advance, a hollow valve opening / closing timing storage area in which opening / closing timing data of the hollow valve 3 is stored in advance, and a discharge amount data described later. And a discharge amount storage area that is sequentially stored.

FIG. 3 is a diagram showing the relationship between the pressure P inside the syringe 1 and the opening / closing timing of the hollow valve 3. The control unit 10 makes the pressure inside the syringe 1 detected by the pressure sensor 5 constant. After that, the hollow valve 3 is controlled to be in an open state, and then the hollow valve 3 is controlled to be in a closed state after a preset predetermined time has elapsed. The shaded portion in the figure shows the discharge amount V of the liquid discharged from the liquid injection nozzle 2, and the control unit 10 calculates V = a · ∫P (t) dt ···· (A) The discharge amount V is calculated based on the equation. That is, the discharge amount V can be calculated by time integration of the pressure P.

Next, the liquid injecting operation to the liquid injecting container by the liquid injecting apparatus of the present embodiment having the above-mentioned structure will be described with reference to FIG.

The hollow valve drive controller 10C of the controller 10 is
The hollow valve 3 is controlled to be closed by stopping the power supply from the power supply 11 to the coil 4B of the electromagnet 4. As a result, the outer peripheral portion of the lower end of the hollow valve 3 is tightly engaged with the inner peripheral portion of the upper end of the liquid injection nozzle 2 to prevent the liquid inside the syringe 1 from being pushed out to the liquid injection nozzle 2 side. Becomes Further, the pump drive control unit 10B of the control unit 10 drives and controls the pump 7 when the hollow valve 3 is closed, and pressurizes the inside of the syringe 1 to a constant pressure. At this time, a part of the air sent from the pump 7 into the interior of the syringe 1 is part of the air flow passage 3 of the hollow valve 3.
Since it is discharged from the lower end of the liquid injection nozzle 2 through C, the inside of the syringe 1 is maintained at a constant pressure (FIG. 4).
(See (a)).

Next, the hollow valve drive controller 10 of the controller 10
C controls so that the hollow valve 3 is opened by energizing the coil 4B of the electromagnet 4 from the power supply 11.
As a result, the upper end 3A of the hollow valve 3 made of a magnetic material is attracted by the electromagnet 4, and the upper end 3A of the hollow valve 3 is engaged with the engaging portion 1A of the upper end of the syringe 1.
The outer peripheral wall of the lower end 3B of the hollow valve 3 is separated from the inner peripheral wall 1B of the conical portion of the syringe 1, and the periphery of the lower end of the hollow valve 3 is soaked in the liquid, and the air flow in the air flow passage 3C of the hollow valve 3 is stopped. , The liquid inside the syringe 1 is the liquid injection nozzle 2
To the side (see FIG. 4 (b)).

Next, the hollow valve control unit 10C of the control unit 10
Controls the hollow valve 3 to be in a closed state by stopping the power supply from the power source 11 to the coil 4B of the electromagnet 4. As a result, the engagement portion 1A at the upper end of the syringe 1 is disengaged from the upper end 3A of the hollow valve 3, the hollow valve 3 moves downward, and the outer peripheral wall of the lower end 3B of the hollow valve 3 becomes a syringe. Since it tightly engages with the inner peripheral wall 1B of the conical portion 1, the liquid is prevented from flowing out from the syringe 1 to the liquid injection nozzle 2 side. At this time, a part of the air sent from the pump 7 into the syringe 1 flows into the air flow passage 3C of the hollow valve 3 (see FIG. 4 (c)).

When a part of the air sent from the pump 7 into the syringe 1 flows into the air flow passage 3C of the hollow valve 3, the liquid remaining inside the liquid injection nozzle 2 is
The pressure of the air flowing into the hollow valve 3 causes the air to be discharged from the lower end portion of the liquid injection nozzle 2, and the liquid injection target container 13
(See FIG. 4 (d)). In this case, the control unit 1
The pump drive control unit 10B of No. 0 controls the pump 7 to continue to drive during the periods of FIGS. The above is the liquid injection operation in the liquid injection device of the present embodiment.

Then, as shown in FIG. 3, the pressure / liquid injection control unit 10A of the control unit 10 operates from the open state to the closed state of the hollow valve 3 when the pressure inside the syringe 1 is constant. The discharge amount of the liquid injection nozzle 2 is calculated based on the calculation formula (A) described above and stored in the storage unit 10D. In this case, the calculated discharge amount may be displayed on a predetermined display unit or may be printed out from a predetermined print output unit.

As described above, according to the present embodiment, the hollow valve 3 inside the syringe 1 is controlled to open and close while the inside of the syringe 1 is constantly pressurized so that the liquid is injected from the liquid injection nozzle 2. In order to discharge the liquid into the liquid injection target container, the pressure inside the syringe 1 is time-integrated based on FIG. 3 and the calculation formula (A) to accurately calculate the discharge amount of the liquid discharged from the liquid injection nozzle 2. In addition, the discharge amount of the liquid by the liquid injection nozzle 2 can be accurately controlled. As a result, it is possible to solve the problem that the discharge amount cannot be accurately controlled as in the conventional case where the discharge amount is controlled based on the pressure inside the syringe pressurized by the pump and the discharge time of the liquid injection nozzle. .

Further, according to the present embodiment, by constantly driving the pump 7, air is discharged from the hollow valve 3 and the liquid injection nozzle 2 during standby before the liquid is injected from the liquid injection nozzle 2 and the syringe 1 is discharged. Since the inside is kept at a constant pressure, it is not necessary to separately provide a constant pressure mechanism for keeping the inside of the syringe at a constant pressure as in the conventional case,
The entire liquid injection device can be miniaturized.

Further, according to the present embodiment, after the liquid is ejected from the liquid injection nozzle 2, the air inside the syringe 1 is sent to the liquid injection nozzle 2 through the air flow passage 3C of the hollow valve 3 and is injected into the liquid injection nozzle 2. In order to push out the liquid remaining inside,
It is possible to eliminate the problem that the liquid remaining in the liquid injection nozzle drops into the liquid injection target container when the liquid is next discharged into the liquid injection target container and an error occurs in the discharge amount as in the conventional case.

In this case, in this embodiment, the hollow valve is made of a magnetic material such as iron and the hollow valve is opened and closed by an electromagnet. However, the present invention is not limited to this, and another hollow valve opening / closing mechanism is used. It is also possible. Further, in this embodiment,
Although the piezoelectric pressure sensor is used as the pressure sensor 5, the present invention is not limited to this, and it is possible to use another pressure sensor such as a semiconductor pressure sensor.

[0035]

As described above, according to the liquid injection device of the present invention as defined in claim 1, the upper and lower ends are opened inside the liquid storage container, and the lower end is the liquid storage container and the liquid injection nozzle. A cylindrical liquid injection control valve having a shape that can be fitted to the inner peripheral wall of the communication part of the is provided, and the liquid injection control valve is fitted to the inner peripheral wall of the communication part of the liquid storage container and the liquid injection nozzle by an actuator. The liquid injection control valve is operated by the actuator so that the liquid injection control valve is not fitted to the inner peripheral wall of the communication portion by the actuator and the liquid is injected into the liquid injection target container, and then the liquid injection control valve is set to the above-mentioned state. When fitted to the inner peripheral wall of the communication part, the air inside the liquid storage container is sent to the liquid injection nozzle through the hollow part of the liquid injection control valve to push the liquid remaining inside the liquid injection nozzle. Therefore, when the liquid is injected into the liquid injection target container as in the conventional case, the liquid remaining in the liquid injection nozzle at the time of the previous liquid injection may drop into the liquid injection target container and cause a variation in the liquid injection amount. The effect is that it can be resolved.

According to the liquid injection device of the present invention as defined in claim 2, the operation of the pump is controlled based on the detection data of the pressure sensor so that the pressure inside the liquid storage container is controlled to be a constant pressure. , It becomes unnecessary to separately provide a constant pressure mechanism for keeping the inside of the liquid storage container at a constant pressure as in the conventional case, and thereby the entire liquid injection device can be downsized, and the pressure inside the liquid storage container can be reduced. Control the operation of the actuator under a constant pressure
In order to control the liquid injection control valve so as not to be fitted to the inner peripheral wall of the communicating portion between the liquid storage container and the liquid injection nozzle, and to control the fitted state after a predetermined time has passed, Compared with the case of controlling the liquid injection amount based on the pressure inside the liquid storage container and the liquid injection time,
It is possible to accurately obtain the liquid injection amount corresponding to the time-integrated pressure inside the liquid storage container, and thereby it is possible to accurately control the liquid injection amount to the liquid injection target container. it can.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a liquid injection device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control system of the liquid injection device according to the present embodiment.

FIG. 3 is a diagram showing a discharge amount of liquid discharged from a liquid injection nozzle in the present embodiment.

FIG. 4 shows a sequence of a liquid injection operation in the present embodiment,
4 (a) is an explanatory view showing a standby state, FIG. 4 (b) is an explanatory view showing an open state of the hollow valve, FIG. 4 (c) is an explanatory view showing a closed state of the hollow valve, and FIG. 4 (d). FIG. 6 is an explanatory diagram showing a discharge state of the liquid remaining in the liquid injection nozzle.

FIG. 5 is an explanatory diagram showing a configuration of a liquid injection device in a conventional example.

FIG. 6 is a diagram showing the relationship between the amount of liquid discharged from a liquid injection nozzle and the pressure inside the syringe.

FIG. 7 is a diagram showing a relationship between a liquid ejection amount from a liquid injection nozzle and a liquid ejection time.

FIG. 8 is an explanatory diagram showing a configuration of a liquid injection device with a needle valve in a conventional example.

FIG. 9 shows a sequence of liquid injection operation of a liquid injection device with a needle valve in a conventional example, FIG. 9 (a) is an explanatory view showing a closed state of the needle valve, and FIG. 9 (b) shows an opened state of the needle valve. FIG. 9C is an explanatory diagram showing a closed state of the needle valve.

FIG. 10 is a diagram showing a relationship between a pressure inside a syringe and a liquid ejection time of a liquid injection nozzle in a conventional example.

FIG. 11 shows a liquid remaining state inside a nozzle in a conventional example, FIG. 11 (a) is an explanatory view showing a state in which liquid remains up to the lower end portion of the liquid injection nozzle, and FIG. 11 (b) shows inside the liquid injection nozzle. Explanatory diagram showing a state in which bubbles are mixed in the liquid,
FIG. 11C is an explanatory diagram showing a state in which the droplets hang down from the lower end of the liquid injection nozzle.

[Explanation of symbols]

 1 Syringe as a liquid storage container 2 Nozzle as a liquid injection nozzle 3 Hollow valve as a liquid injection control valve 3A ', 3B' openings 3C Air flow passage 4 Electromagnet 5 as an actuator 5 Pressure sensor 7 Pump 10 Control as control means Part 13 Liquid injection target container

Claims (2)

[Claims] 1. A liquid storage container in which a liquid to be injected into a predetermined liquid injection target container having an upper opening is stored, a liquid injection nozzle communicating with a lower end of the liquid storage container, and the liquid storage container to the liquid storage container. In a liquid injection device provided with a pump for supplying air for pressurizing the inside of the container, the liquid storage device is provided inside the liquid storage container, and upper and lower ends thereof are open and a lower end portion of the liquid storage container and the liquid injection nozzle. A cylindrical liquid injection control valve having a shape capable of being fitted to the inner peripheral wall of the communication portion, and the liquid injection control valve fitted to the inner peripheral wall of the communication portion between the liquid storage container and the liquid injection nozzle. Alternatively, the liquid injection device is provided with an actuator that operates so as to be in a non-fitted state. 2. A liquid storage container for storing a liquid to be injected into a predetermined liquid injection target container having an upper opening, a liquid injection nozzle communicating with a lower end of the liquid storage container, and the liquid storage container for storing the liquid in the liquid storage container. In a liquid injection device provided with a pump for supplying air for pressurizing the inside of the container, the liquid storage device is provided inside the liquid storage container, and upper and lower ends thereof are open and a lower end portion of the liquid storage container and the liquid injection nozzle. A cylindrical liquid injection control valve having a shape capable of being fitted to the inner peripheral wall of the communication portion, and the liquid injection control valve fitted to the inner peripheral wall of the communication portion between the liquid storage container and the liquid injection nozzle. Alternatively, an actuator that operates so as to be in a non-fitted state and a pressure sensor that detects the pressure inside the liquid storage container are provided, and the operation of the pump is performed based on the detection data of the pressure sensor. Control function for controlling the pressure inside the liquid storage container to be a constant pressure, and the liquid injection by controlling the operation of the actuator while the pressure inside the liquid storage container is a constant pressure. Liquid injection amount control for controlling the control valve to be in a non-fitting state with respect to the inner peripheral wall of the communicating portion between the liquid storage container and the liquid injection nozzle and to be in a fitting state after a lapse of a predetermined time. A liquid injection device comprising a control means having a function.