JPH0573455B2 - - Google Patents

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 one example is the temperature of various materials, parts of various equipment, various equipment, devices, etc., and the influence of the temperature. An example is a saturated air generation tank for humidity control used in a constant temperature and humidity chamber 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. let me,
A liquid level detection means such as a float switch in the regulator supplies water to obtain a predetermined amount of water while detecting the water level in the container, and when pressure is applied to the container, the gas phase part of the container and water level regulator is A method of connecting with pressure equalizing pipes 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 the mounting position, and when pressure is applied to the container, a pressure equalizing tube is required as described above, so there are problems in that the pressure equalizing tube is troublesome to attach and is bulky.

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 complicating the installation structure of the meter, there were various installation restrictions, and installation was sometimes impossible depending on the structure of the saturated air generator.

Therefore, 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 is installed inside 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 the arrangement that the liquid level must be substantially coincident with a predetermined liquid level.

[Means to solve the problem]

The method of the present invention for achieving the above object is a method for supplying liquid to a closed container, which includes connecting a liquid supply pipe to an upper gas phase portion of the container and opening an opening at a predetermined liquid level to a lower liquid phase portion of the container. A liquid overflow pipe is connected to the liquid level regulator, which has a liquid inlet and a liquid drain, and is provided with a liquid level detection means, and the liquid inlet has a larger area than the liquid drain. connecting to a liquid pipe, supplying liquid from the liquid supply pipe to the container, causing liquid exceeding the predetermined liquid level to flow from the overflow pipe to the liquid level regulator, and causing liquid to flow into the liquid level regulator. The liquid is supplied so that the amount is greater than the discharge amount, and when the liquid level detecting means is activated due to a rise in the liquid level in the liquid level regulator, the liquid supply is stopped and the overflow pipe is closed. shall be.

In the method, if the liquid is supplied at predetermined time intervals, the amount of water in the container can be maintained substantially constant 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 in multiple tiers above and below, each of the vertically adjacent small containers has an upper end that is connected to the upper tier. 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 connected to the gas phase part of the uppermost small container. Open the lower small container to the specified liquid level.

[Effect]

According to the liquid supply method of the present invention, the liquid is supplied from the liquid supply pipe into the container, thereby increasing the amount of liquid in the container, and when the liquid reaches the opening position of the overflow pipe, the liquid beyond that point is removed from the overflow. It flows out from the liquid pipe and flows into the liquid level regulator. Since the liquid inlet area of the regulator is larger than the liquid outlet area, the amount of liquid flowing into the liquid level regulator is greater than the amount of liquid draining from the regulator, and therefore, the amount of liquid flowing into the liquid level regulator is greater than the amount of liquid flowing out from the regulator. The liquid gradually accumulates 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 overflow pipe is closed. Thereafter, the liquid in the liquid level regulator is discharged and is ready for the next liquid level adjustment.

If the liquid is supplied to the container at predetermined time intervals,
The above operation is repeated, and the amount of liquid in the container is kept almost 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 and humidity chamber.

Figure 1 shows the schematic configuration of a constant temperature and humidity chamber. This temperature and humidity chamber A consists of a test chamber 1 and a brine chamber 2.
The internal temperature of the test tank 1 is set by submerging the brine in a brine 20 and controlling the brine to a predetermined temperature by a temperature control means (not shown), and saturated air is introduced into the test tank 1 from a saturated air generator 3. The test chamber is configured such that as saturated air is introduced, a portion of the gas in the test chamber is discharged to the outside through an exhaust hole (not shown).

As shown in detail in FIG. 2, the saturated air generator 3 includes a brine tank 31 containing brine B.
The brine B is controlled to a predetermined temperature by using one or both of a heater 32 and a cooler 33 for brine temperature control arranged inside the tank.

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 consists of a sealed upper tank 341 and a lower tank 342, and a liquid tank portion 341b of the upper tank 341 is provided with a connecting pipe 343 whose upper end is open at a predetermined water level.
The lower end of the tube opens into the gas phase section 342a of the lower tank 342.

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 a pipe 52 having a solenoid valve 51 in the middle. Therefore, it is connected to a dry air generation tank 53.

Water W is placed in each of the upper and lower tanks, and the water temperature is controlled by brine B to a predetermined temperature. The water W may be frozen depending on the saturated air to be obtained. In this state, solenoid valve 5
1 is opened, 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 and becomes saturated air. The test chamber 1 is passed through the solenoid valve 41 and the pipe 42.
supplied to 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 along the way and is also heated in the test tank, so that the air has a predetermined temperature and humidity. Further, as the saturated air is supplied, a part of the gas in the test chamber 1 is pushed out from an exhaust hole (not shown).

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

That is, a water supply pipe 61 is connected to the gas phase portion 341a of the upper tank 341, 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, an overflow pipe 71 that opens to a predetermined water level in the brine tank is provided in the liquid tank part 342b of the lower stage brine tank 342, and the pipe is passed through the bottom wall of the brine tank 31 and extended downward into the brine tank, and a water level regulator 8 It is connected to the water inlet 81 of. 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 inlet 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 supply water from the water tank 64 to the upper tank 341. With this, the upper stage 3
The water level in 41 rises and when it reaches the upper opening of tube 343, the water that is subsequently supplied begins to flow through the tube 343 into the lower chamber 342.
When the water inflow into the lower cassette 342 causes the water level in the cassette to rise and 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 then flows through the drain hole. 82, is discharged to the outside from the drain pipe 9. The amount of water supplied by the water supply pipe 61 is such that the amount of water flowing into the water level regulator 8 from the water inlet 81 via the overflow pipe 71 is equal to the amount of water flowing into the water level regulator 8 from the drain port 82 of the regulator.
Set it so that it is larger than the amount of water discharged to the outside.

In this way, the water level in the water level regulator 8 gradually rises due to the difference between the inflow and discharge amounts of water, and the water level detecting means (in this example, a float switch) 83 in the regulator is activated, and the upper chamber 341 and In the lower 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.
Close the solenoid valve 72 at. In this way, each tank of the saturated air generation tank 34 is filled with a predetermined amount of water. 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 operates the pump 63 at predetermined fixed time intervals, and has electromagnetic valves 62 and 71.
It is controlled so that a substantially constant amount of water is always present in each of the upper and lower tanks.

According to the embodiment method described above, although the water level regulator is used to control the water level or water amount in the saturated air generation tank 34 to a predetermined level, the water level regulator does not control the water level or the amount of water in the saturated air generation tank 34 to a predetermined level. 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.

It should be noted that the present invention is not limited to the above embodiments, and can be implemented in various other ways. For example, although the saturated air generation tank 34 is made up of upper and lower containers and a small container 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 liquid is supplied to the container at predetermined time intervals, the amount of liquid in the container is always maintained substantially constant.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a constant temperature and humidity 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 and humidity chamber, 1... Test tank, 2... Brine tank, 20... Brine, 3... Saturated air generator, 31... Brine tank, 34... Saturated air generation tank, 341... Upper tank, 342...Lower tank, 3
41a, 342a...gas phase part, 341b, 342
b...liquid phase section, 343...connecting pipe, 61...water supply pipe, 62...electromagnetic valve, 63...pump, 64...
...Water tank, 71...Overflow pipe, 72...Solenoid valve,
8...Water level regulator, 81...Water inlet, 82...
Drain port, 83...Float switch, 9...Drain pipe, 10...Control unit.

Claims (1)

[Scope of Claims] 1. A method for supplying liquid to a closed container, which includes connecting a liquid supply pipe to an upper gas phase portion of the container and providing an overflow opening to a predetermined liquid level in a lower liquid phase portion of the container. A liquid level regulator is connected to a liquid pipe, and has a liquid inlet and a liquid drain, and is provided with liquid level detection means, and the liquid inlet has a larger area than the liquid drain, and the liquid inlet is connected to the overflow pipe. , the liquid is supplied from the liquid supply pipe to the container, and the liquid exceeding the predetermined liquid level flows into the liquid level regulator from the overflow pipe, and the amount of liquid flowing into the liquid level regulator is The liquid is supplied so as to be larger than the discharge amount, and when the liquid level detecting means is activated due to a rise in the liquid level in the liquid level regulator, the liquid supply is stopped and the overflow pipe is closed. Liquid supply method. 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 a plurality of vertically arranged tiers, and the upper end of each vertically adjacent small container opens to a predetermined liquid level in the upper tier small container, and the lower end opens to the gas phase part of the lower tier tier small container. 3. The liquid supply pipe is connected to a gas phase portion 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. Liquid supply method.