JPH0483527A - Method for supplying liquid to closed container - Google Patents

Abstract

PURPOSE:To always supply a specific amount of a liquid to a closed container by a method wherein a liquid level detection means is operated when the liquid is gradually accumulated in a liquid level controller and the level thereof rises not only to stop the supply of the liquid to the container but also to close an overflow pipe. CONSTITUTION:A liquid supply pipe 61 is connected to the upper gaseous phase parts 341a, 342a of containers 34 and an overflow pipe 71 opened at a predetermined liquid level is connected to the lower liquid phase parts 341b, 342b of the container 34. Further, a liquid level detection means 83 is mounted and the liquid inflow port 81 of a liquid level controller 8 wherein the area of the liquid inflow port 81 is larger than that of a drain port 82 is connected to the overflow pipe 71. A liquid is supplied to the container 34 from the liquid supply pipe 61 and the liquid exceeding a predetermined liquid level is allowed to flow in the liquid level controller 8 from the overflow pipe 71 and the liquid is supplied so that the liquid inflow amount in the liquid level controller 8 becomes larger than the discharge amount therein and, when the liquid level detection means 83 is operated by the rise in the liquid level in the liquid level controller 8, the supply of the liquid is stopped and the overflow pipe 71 is closed. As a result, a specific amount of the liquid can be always supplied to the closed container.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for dispensing a predetermined amount of liquid into a closed container.

[Conventional technology]

There are various cases in which a predetermined amount of liquid must be supplied to a closed container, but examples include the influence of various materials, parts of various equipment, various equipment, equipment, etc. under temperature and humidity conditions. An example of this is a saturated air generation tank for humidity control used in a constant temperature incubator for testing.

Conventionally, when supplying water to a predetermined water level or amount to a closed container such as a saturated air generating tank, a water level regulator placed at approximately the same level as the predetermined water level in the container is generally connected to the container. The water level in the container is detected by a liquid level detection means such as a float switch in the regulator, and water is supplied to obtain a predetermined amount of water. If pressure is applied to the container, the gas phase part of the container and water level regulator is A method of connecting with a pressure equalizing pipe was adopted, and in some cases, a method of attaching a liquid level gauge directly to the container was also adopted.

[Problem to be solved by the invention]

However, when adopting the liquid level regulator, there are restrictions on its mounting position, and if pressure is applied to the container, a pressure equalizing pipe is required as described above, so the installation of the pressure equalizing pipe is difficult. There was also the problem that it was troublesome and expensive.

In the method of attaching a liquid level gauge directly to a container, for example, when the container is submerged in brine for controlling the temperature of the liquid in the container, such as in the saturated air generation tank, the level In addition to the complicated structure required to install the meter, there are various installation restrictions, and depending on the structure of the saturated air generator, installation may not be possible.

Accordingly, the present invention provides a method for supplying liquid to a closed container, in which the amount of liquid in the container can be adjusted to a predetermined level using a liquid level regulator, and the liquid level regulator can be used to control the amount of liquid in the container. It is an object of the present invention to provide a liquid supply method that does not require a pressure-equalizing pipe and is not limited to being arranged so as to substantially match a predetermined liquid level.

[Means to solve the problem]

The method of the present invention that achieves the above object is a method for supplying liquid to a closed container, in which a liquid supply pipe is connected to an upper gas phase portion of the container, and a lower liquid phase portion of the container is brought to a predetermined liquid level. The liquid inlet of a liquid level regulator is connected to a bath liquid pipe to be opened, has a liquid inlet and a liquid drain, and is provided with a liquid level detection means, and the area of the liquid inlet is larger than the area of the drain. connected to a bath liquid pipe, supplies liquid from the liquid supply pipe to the container, causes liquid exceeding the predetermined liquid level to flow from the bath liquid pipe to the liquid level regulator, and controls the liquid level in the liquid level regulator. The liquid is supplied so that the inflow amount is greater than the discharge amount, and when the liquid level detection means is activated due to a rise in the liquid level in the cough liquid level regulator, the liquid supply is stopped and the bath liquid pipe is closed. It is characterized by

In the method, if the liquid is supplied at predetermined time intervals, the amount of water in the container can be maintained at a constant level at all times.

In addition to a single container, the container may be of various types. For example, if the container is composed of small containers arranged vertically in multiple tiers, each of the small containers displayed vertically has a top end. The upper end of the overflow pipe is connected by a pipe that opens at a predetermined liquid level in the upper small container and whose lower end opens to the gas phase part of the lower small container, and connects the liquid supply pipe to the gas phase part of the uppermost small container. is opened to a predetermined liquid level in the lowermost small container.

[Function] According to the liquid supply method of the present invention, the liquid is supplied into the container from the liquid supply pipe, thereby increasing the amount of liquid in the container, and when the liquid reaches the opening position of the bath liquid pipe, the liquid exceeding the opening position increases. flows out of the bath liquid pipe and into the liquid level regulator. Since the liquid inlet area of the regulator is larger than the liquid drain area, the amount of liquid flowing into the liquid level regulator is greater than the amount of liquid draining from the regulator,
Therefore, liquid gradually accumulates in the liquid level regulator and the liquid level rises. When the liquid level detection means is activated due to the rise in the liquid level, the supply of liquid into the container is stopped and the bath liquid pipe is closed. Thereafter, the liquid in the liquid level regulator is discharged and is ready for the next liquid level adjustment.

If liquid is supplied to the container at predetermined time intervals, the above operation is repeated, and the amount of liquid in the container is maintained approximately constant at all times.

〔Example〕

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

The embodiment described below is a case where a predetermined amount of water is supplied to a saturated air generation tank in a saturated air generation device of a constant temperature constant temperature chamber.

FIG. 1 shows a schematic configuration of a constant temperature incubator, and this constant temperature incubator A has a test tank submerged in brine 20 of a brine tank 2, and the brine is brought to a predetermined temperature by a temperature control means (not shown). By controlling the temperature inside the test chamber 1 to a predetermined temperature, saturated air is introduced into the test chamber 1 from the saturated air generator 3, and a part of the gas in the test chamber is not shown as the saturated air is introduced. It is configured to be discharged to the outside through an exhaust hole.

As shown in detail in FIG. 2, the saturated air generator 3 includes a brine tank 31 containing brine B.
The temperature is controlled to a predetermined temperature by using one or both of the cooler 2 and the cooler 33.

A saturated air generation tank 34 is buried in the brine B, and is supported by the brine tank 31 by support means (not shown). The saturated air generation tank 34 is a sealed upper tank 341
and a lower tank 342, and the liquid tank part 341b of the upper tank 341 has a connecting pipe 343 whose upper end opens at a predetermined water level.
The lower end of the pipe is connected to the gas phase part 342 of the lower tank 342.
It opens at a.

The gas phase part 341a of the upper tank 341 is connected to the test chamber 1 by a pipe 42 having a solenoid valve 41 in the middle, and the gas phase part 342a of the lower tank 342 is connected to dry air by a pipe 52 having a solenoid valve 51 in the middle. It is connected to the generation tank 53.

Water W is placed in each of the upper and lower tiers, and the water temperature is controlled by brine B to a predetermined temperature. Water W
may be frozen depending on the saturated air desired. In this state, by opening the electromagnetic valve 51, the dry air supplied from the dry air generation tank 53 to the lower tank 342 enters the upper tank 341 through the pipe 343 while contacting the water surface in the lower tank 342, where it also comes into contact with the water surface. The contact becomes saturated air, which is supplied to the test chamber 1 through the electromagnetic valve 41 and the pipe 42. Note that when the water W is frozen and used, the water surface is a frozen water surface.

The saturated air supplied to the test tank 1 is heated by the brine 20 on the way and is also heated in the test tank,
The air has a predetermined temperature and humidity.

In addition, as the saturated air is supplied, a part of the gas in the test chamber 1 is pushed out through an exhaust hole (not shown).

Water is supplied to the saturated air generation tank 34 in accordance with the method of the present invention as follows.

That is, the water supply pipe 6 is connected to the gas phase portion 341a of the upper tank 341.
1, and the pipe 61 is connected to a water tank 64 at normal temperature via a solenoid valve 62 and a pump 63. On the other hand, the liquid tank portion 342b of the lower tank 342 is provided with an overflow pipe 71 that opens to a predetermined water level in the tank, and a cough pipe is passed through the bottom wall of the brine tank 31 to extend downward into the brine tank. Connect to water flow population 81. Drain hole 8 of water level regulator 8
A drain pipe 9 is connected to 2. A solenoid valve 72 is provided in the middle of the overflow pipe 71.

Here, the opening area of the water flow volume 81 of the water level regulator 8 is made larger than the opening area of the drain hole 82, and the inner diameters of the overflow pipe 71 and the connecting pipe 343 are made larger than the inner diameter of the drain pipe 9. put.

Under these preparations, the solenoid valve 62 is opened and the pump 63 is operated to drain water from the water tank 64 to the upper tank 341.
supply to As a result, the water level in the upper tank 341 rises, and when the water level reaches the upper end opening of the pipe 343, water to be supplied later starts to flow into the lower tank 342 through the pipe 343.

As water flows into the lower tank 342, the water level in the tank rises,
When the water level begins to exceed the upper end opening of the overflow pipe 71, the water flows into the water level regulator 8 through the overflow pipe 71, and is further discharged to the outside through the drain hole 82 and the drain pipe 9. The water supply pipe 6
1, the water flow rate is 8 through the overflow pipe 71.
The amount of water that flows into the water level regulator 8 from the water level controller 8 is set to be larger than the amount of water that is discharged to the outside from the drain port 82 of the regulator.

In this way, the water level in the water level regulator 8 gradually rises due to the difference between the inflow and discharge of water, which activates the water level detection means (in this example, a float switch) 83 in the regulator, and the upper tank 341 and the lower tank In the tank 342, a signal is sent to the control unit 10 to inform that the water level is at a predetermined water level. Based on this signal, the control unit stops the pump 63 on the water supply side, closes the solenoid valve 62, and at the same time closes the overflow pipe 71.
The solenoid valve 72 at is closed. In this way, water is stored in each of the saturated air generation tanks 34 to a predetermined amount.

Thereafter, the liquid in the water level regulator 8 is allowed to fall and discharge, in preparation for the next water level adjustment.

The control unit 10 controls the pump 63 at predetermined time intervals.
is operated, and the solenoid valves 62 and 71 are opened, thereby controlling so that a constant amount of water is always present in each of the upper and lower stages.

According to the method of the embodiment described above, although the water level or amount of water in the saturated air generation tank 34 is controlled to a predetermined level using the water level regulator, the water level regulator is adjusted to the predetermined water level in the saturated air generation tank 34. It is not necessary to arrange the water level regulator at almost the same level, and it is extremely convenient when it is difficult to arrange the water level regulator at such a level, and there is no need to connect the water level regulator and the saturated air generation tank 34 with a pressure equalizing pipe. do not have.

Note that the present invention is not limited to the above embodiments,
It can also be implemented in various other ways. For example, although the saturated air generation tank 34 is made up of upper and lower small containers in the above example, it may be made up of more containers, or conversely, it may be made up of a single container. The present invention can be applied to any case. Further, the present invention can be applied not only to the saturated air generation tank of the above embodiment, but also to a wide range of applications in which liquid (not limited to water) is supplied to a closed container.

〔Effect of the invention〕

As explained above, according to the present invention, there is provided a method for supplying liquid to a closed container, in which the amount of liquid in the container can be adjusted to a predetermined value using a liquid level regulator, and the liquid level can be adjusted to a predetermined value. It is possible to provide a liquid supply method without the restriction that the container must be arranged so as to approximately correspond to a predetermined liquid level in the container, and without the need for a pressure equalizing pipe.

When the liquid is supplied to the container at predetermined time intervals, the amount of liquid in the container is maintained approximately constant at all times.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a constant temperature constant temperature chamber to which the method of the present invention is applied, and FIG. 2 is a sectional view of essential parts of a saturated air generator. A... Constant temperature constant temperature chamber 2... Brine tank 3... Saturated air generator 31... Brine tank 34... Saturated air generation tank 341... Upper tank 342... Lower tank 341
a, 342a...Gas phase part 341b, 342b...Liquid phase part 343...Connecting pipe 61...Water supply pipe 63...Pump 71...Overflow-pipe 8...Water level regulator 82...Drain port 9...Drain pipe 10...Control unit ■...Test tank 20...Brine 62...Solenoid valve 64...Water tank 72...Solenoid valve 81...・Water inlet 83...Float switch

Claims (3)

[Claims] (1) A method for supplying liquid to a closed container, in which a liquid supply pipe is connected to the upper gas phase part of the container, and an overflow pipe that opens at a predetermined liquid level is connected to the lower liquid phase part of the container. and has a liquid inlet and a liquid drain, as well as a liquid level detection means,
The liquid inlet of the liquid level regulator, the liquid inlet area of which is larger than the liquid drain area, is connected to the overflow pipe, and the liquid is supplied from the liquid supply pipe to the container, and the liquid exceeds the predetermined liquid level. flowing from the overflow pipe into the liquid level regulator, and supplying the liquid so that the amount of liquid flowing into the liquid level regulator is greater than the amount of liquid being discharged, thereby increasing the liquid level in the liquid level regulator. A liquid supply method characterized in that, when the liquid level detection means is activated, the liquid supply is stopped and the liquid overflow pipe is closed. (2) The liquid supply method according to claim 1, wherein the liquid amount in the container is always maintained substantially constant by performing the liquid supply at predetermined time intervals. (3) The container is composed of small containers arranged in multiple stages vertically, and each vertically adjacent small container has an upper end opening at a predetermined liquid level in the upper small container, and a lower end opening in the gas phase of the lower small container. 2. The liquid supply pipe is connected to the gas phase part of the uppermost small container, and the upper end of the overflow pipe is opened to a predetermined liquid level of the lowermost small container. The liquid supply method described.