JP2586813Y2 - Humidifier reinforced siphon drainage system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a humidifier drainage device for discharging water from a humidifier in which water contained in a container and maintained at a predetermined water level is evaporated by a heating means. It is used for supplying water vapor to a device or a room that needs humidity control, such as a constant humidity room and a clean room.

[0002]

2. Description of the Related Art In a humidifier used in an environmental test apparatus or the like, water is usually collected in a water tank, heated and evaporated by a heater, and the vapor is taken out and guided to a humidified portion.
In such a humidifier, since water evaporates, scales and other foreign matter generated by condensing water scales and impurities in the water and solidifying into stones are generated in the water tank. Problems such as lowering and disconnection of the humidifying heater occur. For this reason, the water in the water tank is drained, and fresh water is replenished so as to prevent generation of scale and increase in impurity concentration. As such a drainage system, those shown in FIGS. 6 to 8 are conventionally known.

FIG. 6 shows a commonly used drainage device.
The solenoid valve 20 is opened and closed to discharge water in the steam cylinder 1 at a certain time for a certain amount or for a certain time. In this type of apparatus, the scale or the like discharged together with water clogs the solenoid valve, resulting in poor closing of the solenoid valve and poor drainage. In order to prevent this, a very fine strainer 21 is provided to prevent foreign matter from entering the solenoid valve. However, this strainer is liable to cause drainage failure due to clogging of water scales and scales.In addition, if water scales and scales are accumulated in the steam cylinder, the humidification operation is interrupted to disassemble and disassemble the steam cylinder. However, it is necessary to clean the humidifier manually, and the humidifying operation is interrupted for a long period of time, thereby lowering the operation rate of the humidifier and causing trouble in maintenance work.

[0004] The apparatus shown in FIG.
New water is supplied from 2a to raise the water level, and the water is to be drained using the suction action of the siphon pipe 22 (see Japanese Utility Model Laid-Open No. 3-48630). In this apparatus, it was experimentally confirmed that if a siphon tube having a diameter exceeding 10 mm was used, the suction action would not occur unless the water level on the steam cylinder side was raised by at least 100 mm from the inverted U-shaped portion of the siphon tube. However, if the water level of the steam cylinder is raised, a large amount of water must be newly supplied, which is not preferable from the viewpoint of saving water, and the steam cylinder is vertically enlarged by the rise in water level. On the other hand, if the siphon tube is 10 mm or less, the scale will not be sufficiently discharged, and large scale will remain in the steam cylinder. Further, since the drainage speed is not so fast, there is a problem that the humidification operation stop time at the time of drainage becomes longer, and disturbance of humidity control becomes longer in a constant temperature and humidity room or the like. Further, the small-diameter siphon tube is sensitive to fluctuations in the water level of the steam cylinder.
Unnecessary suction action is likely to occur, and in that case, the problem that the humidifying operation is interrupted occurs.

[0005] The apparatus shown in FIG. 8 is intended to discharge the entire amount of water in the steam cylinder 1 by the pump 23 (Japanese Unexamined Patent Publication No. HEI 4 (1994)).
-24610). However, in such a method, since the pump is provided in the drainage channel 24, there is a possibility that the pump may bite foreign matter such as scale. In order to prevent this, a coarse strainer 25 is provided, but if such a strainer is provided, only a relatively small scale will be discharged, and extra work for cleaning the steam cylinder and the accompanying humidifier will not be performed. There is a problem that the operation is interrupted.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and has a high drainage speed, no unnecessary drainage, large scale discharge, and humidification without poor drainage. It is an object to provide a drainage device for a vessel.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problem by draining a humidifier that discharges water from a humidifier in which water contained in a container and maintained at a predetermined water level is evaporated by a heating means. 2. The device according to claim 1, wherein the first siphon pipe is opened at the bottom of the vessel and is formed in an inverted U-shape above the predetermined water level outside the vessel, and the height of the first siphon pipe is continuous with the first siphon pipe. Supplies water to a second siphon tube formed in an inverted U-shape at a height lower than twice the first siphon tube, and a falling portion of the first siphon tube and a rising portion between the second siphons. And a water supply means. The invention according to claim 2, characterized in that an opening is formed at the bottom of the container and the outside of the container is higher than the predetermined water level.
It has a siphon pipe formed in a shape of a letter, and water jetting means for jetting water at a falling portion of the siphon pipe in a falling direction at a predetermined flow rate and flow rate.

[0008]

According to the first aspect of the present invention, the water supply means for supplying water to the falling portion and the rising portion of the first and second siphon tubes formed in an inverted U shape and continuous is provided.
When water is supplied to the portion by the water supply means to raise the water level, the water passes over the inverted U-shaped top of the second siphon tube, and a siphon phenomenon occurs in the second siphon tube. Due to this siphon phenomenon, the gap in the first siphon tube becomes negative pressure, a siphon is formed also in the first siphon tube, and water in the container is continuously discharged by the siphon.

According to such a drainage device, the second siphon pipe can be used as a pilot siphon.
The siphon phenomenon can be generated even if the siphon tube is large in size. That is, when water is supplied between the first and second siphon pipes, since the water level rises very quickly, the amount of water supplied to the inverted U-shaped top of the pilot siphon immediately flows to the drainage side, so that the siphon can be easily formed. It is formed. In this case, since the height of the second siphon is set to be lower than twice the height of the first siphon tube, when water is put between the two siphon tubes, the water is in the second position.
Although the water flows on the falling side of the siphon tube, it does not flow on the rising side of the first siphon tube, and the supplied water is effectively used for siphon formation.

According to the second aspect of the present invention, since water is jetted at a predetermined flow rate and flow rate in the falling direction at the falling portion of the siphon tube, the surrounding air is entrained by the jet flow of water, and the upstream of the siphon tube is taken up. A negative pressure is generated on the side and the water in the container is sucked out and drained by siphon. in this case,
The predetermined flow velocity and flow rate are determined in consideration of the siphon pipe diameter, the difference in height between the siphon and the vessel water surface, etc., so that a siphon is formed in a short time after water is jetted out.

[0011]

FIG. 1 shows the configuration of a humidifier drainage device according to an embodiment. The present drainage device is a device for discharging water of a humidifier 10 in which water placed in a steam cylinder 1 as a container and maintained at a predetermined water level H is evaporated by a heater 2 as heating means. A first siphon pipe 3 which is open at the bottom 1a and is formed in an inverted U-shape above the predetermined water level H outside thereof, and a height which is continuous with the first siphon pipe 3 and which is higher than twice the height h of the first siphon pipe; A second siphon pipe 4 formed in an inverted U shape with a low height h ′, and a water supply means for supplying water to a falling part 3 a of the first siphon pipe 3 and a rising part 4 a of the second siphon pipe 4. It has a water supply pipe 5 and a solenoid valve 6. External tap water or industrial water having an appropriate pressure is supplied to the water supply pipe 5. However, as shown in FIG. 2, water may be supplied from the steam cylinder 1 by the pump 7 instead of water supplied by the external piping and the solenoid valve. In this case, it is preferable that the pump 7 sucks water from a position slightly higher than the bottom 1a so as not to suck dust and the like in the steam cylinder 1.

In this embodiment, since the first siphon pipe 3 is connected to the bottom 1b of the steam cylinder 1, it is possible to effectively discharge the dust and scale that has settled and accumulated at the bottom.
However, it may be connected to the lowest position of the cylinder portion 1c or may be connected to the upper portion to introduce the inner tube to the bottom portion 1a. Further, the water supply pipe 5 is connected to the first siphon pipe 3.
Although it is connected to the side, it may be connected to the second siphon tube 4 side or a continuous portion of both siphon tubes. The continuation may be of some length.

FIG. 3 shows a state in which the second siphon pipe 4 operates as a pilot siphon and the water in the steam cylinder 1 is drained by siphon. As shown in FIG. 4A, when water is poured into the steam cylinder 1 through the float chamber 14 as shown in FIG.
The water level in the siphon tube 3 also becomes the same. When the humidifier is operated in this state, the heater 2 is turned on to heat the water inside, the water vapor is taken out from the top 1d of the steam cylinder 1, and the water is supplied from a water supply device (not shown) so as to maintain the water level H. Is replenished. If the operation is continued while replenishing the amount of evaporated water, the water in the water tank 1 is gradually concentrated, and if left untreated, the scale of the humidifier will be generated, and the performance of the humidifier will be reduced, or the heater will adhere to the heater and the wire will be disconnected. Or to generate. For this reason, when the humidifier is operated for a certain period of time, the drainage device is operated to discharge the water in the water tank 1.

When draining, as shown in FIG. 1B, the solenoid valve 6 is opened, and water is supplied from the water supply pipe 5 to the joint of both siphons. FIG. 3C shows a state where the water in the second siphon tube 4 exceeds the top when the second siphon tube 4 is higher than the first siphon tube 3. When water is further poured into both siphon tubes from the state shown in FIG. 3B, the water occupies the space of the first siphon tube 3 as the water level rises, so that the air in the space is slightly compressed and the pressure is reduced. have. Falling part 3 of first siphon tube 3
When the water level of a rises by y, the water level of the rising part 3b of the first siphon pipe 3 falls by substantially y, while the water level of the rising part 4a of the second siphon pipe 4 rises by about 2y. At this time, the water level in the steam cylinder 1 also rises, but since the cross-sectional area of the steam cylinder 1 is sufficiently large as compared with that of the siphon tube, the rise amount is very small and negligible.

In the present invention, since the height of the second siphon tube 4 is lower than twice the height of the first siphon tube 3, as shown in the drawing, the second siphon tube 4 is inserted between the two siphon tubes. The water reaches the top of the second siphon tube 4 without flowing to the first siphon tube 3 side. If more water is added, the water will pass over the top of the second siphon tube 4 to form a pilot siphon. In addition,
The height of the second siphon tube 4 is desirably slightly lower than the height h of the first siphon tube 3 as shown in FIG. 1 so that the pilot siphon is formed as quickly as possible.

FIG. 2D shows that after water introduced between the two siphon tubes has passed over the second siphon tube 4 to form a pilot siphon, the water in the steam cylinder 1 is passed through the first siphon tube 3. This shows a state in which water is being siphoned out. The water 8 in the steam cylinder 1 is sucked out by the negative pressure formed above the water 9 in the pilot siphon as the water 9 descends. When the siphon is effective, the water is discharged at a high flow rate, and when the entire amount of water in the steam cylinder 1 and the makeup water tank (not shown) is discharged, the siphon is cut off and drainage is completed.

In the conventional method of forming a siphon by supplying water into the steam cylinder 1, the water level rises slowly because the surface area of the container is large. On the other hand, the amount of water passing over the siphon pipe is determined by the balance between the water level difference and the resistance in the pipe. Therefore, when the rise in water level is slow, the amount of water exceeding the siphon pipe is small, and a siphon is not easily formed. If the pilot siphon is used as in the present invention, the water is supplied not to the steam cylinder 1 but to the siphon itself, so that the water level rises rapidly in the pilot siphon, the amount of water exceeding the siphon pipe increases, and the siphon pipe diameter increases. A siphon can be easily formed even if it is enlarged.

If draining is performed by a siphon pipe having a large diameter using such a device, the draining speed is increased, so that the draining time is shortened, the operation rate of the humidifier is increased, and disturbance of humidity control in an environmental test device or the like is reduced. Become. Also, large-scale discharge is possible. Since a pump or a solenoid valve is not used in the drain line, there is no danger of drainage failure due to clogging of dust and the like, and maintenance work such as cleaning of the steam cylinder is reduced, thereby saving labor. Further, since the amount of water supplied by the water supply pipe 5 to exceed the top of the second siphon pipe 4 is extremely small, a siphon can be formed quickly and water can be saved. In addition, since the siphon tube has a large diameter, unnecessary drainage does not occur even if there is a pressure fluctuation in an environmental test device or the like. in this case,
Even if the height of the first siphon pipe 3 is increased in order to prevent the generation of siphons due to pressure fluctuations, only water is introduced into the siphon pipe, so that the amount of consumed water does not increase and the vessel does not need to be enlarged.

FIG. 4 shows a drainage device according to another embodiment. This drainage device has a siphon pipe 11 and a falling part 1 thereof.
1a, a pump 12 and a nozzle 13 as water jetting means for jetting water at a predetermined flow rate and flow rate in the falling direction
a provided with a water supply pipe 13. The predetermined flow velocity and flow rate are determined by the size of the siphon pipe 11 and the height h from the predetermined water level.
_{According to 1} etc., it is determined that the siphon is formed quickly. As shown in FIG. 5 in which the falling portion 11a is enlarged, it is desirable to provide a throttle portion 11a-1 so that a negative pressure is effectively formed. The pump 12
In this embodiment, water is sucked from the float chamber 14. However, the pump 12 may be omitted, and water may be supplied to the nozzle 13a from another system. The float chamber 14
Is connected to the steam cylinder 1 and a make-up water valve (not shown) is controlled by a float 15 provided therein, so that the internal water level is adjusted to be constant.

According to such a drainage device, since water is jetted from the nozzle portion 13a at a high speed toward the throttle portion 11a-1 of the siphon tube falling portion 11a, the air in the tube is accompanied by the downstream air as shown in the figure. The water in the steam cylinder 1 is discharged by forming a negative pressure in the upstream part and forming a siphon in the siphon pipe 11.
In this case, since a negative pressure is forcibly formed, the drain pipe can be made large.

In the drainage device of this embodiment, it is not necessary to provide a pump, a strainer, and the like, and the siphon pipe can be made large in diameter. Therefore, the same effect as that of the embodiment of FIG. 1 can be obtained.

[0022]

As described above, according to the present invention, it is possible to increase the diameter of the siphon tube, so that the drainage speed is increased, the drainage time is shortened, and the operation rate of the humidifier is increased. Also, large-scale discharge is possible. In addition, since strainers and solenoid valves are not used in the drain line, there is no danger of drainage failure due to clogging of dust and the like, and scale accumulation and new scale growth are suppressed, and maintenance work such as cleaning of containers is reduced. And labor saving is achieved. Also from this point, the operation rate of the humidifier is improved. Further, unnecessary drainage due to pressure fluctuation is prevented, and drainage is reliably performed only when necessary.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a structure of a humidifier drainage device according to an embodiment.

FIG. 2 is an explanatory diagram when a water supply source is changed in the drainage device.

FIGS. 3A to 3D are explanatory views of the operation of the drainage device.

FIG. 4 is an explanatory view showing a structure of a drain device of a humidifier according to another embodiment.

FIG. 5 is an explanatory view showing a structure of a water ejection section of the drainage device.

FIG. 6 is an explanatory diagram showing a structural example of a conventional humidifier drainage device.

FIG. 7 is an explanatory view showing another example of the structure of the conventional humidifier drainage device.

FIG. 8 is an explanatory view showing still another example of the structure of the conventional humidifier drainage device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steam cylinder (container) 1a Bottom part 2 Heater (heating means) 3 First siphon pipe 3a Falling part 4 Second siphon pipe 4a Rising part 5 Water supply pipe (water supply means) 6 Solenoid valve (water supply means) 10 Humidifier 11 siphon pipe 11a falling part 12 pump (water injection means) 13 water supply pipe (water injection means)

Continuation of front page (56) References JP-A-63-172850 (JP, A) JP-A-54-24257 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24F 6 / 00

Claims (2)

(57) [Scope of request for utility model registration] 1. A humidifier drainage device for discharging water of a humidifier in which water held in a container and maintained at a predetermined water level is evaporated by a heating means, wherein the drainage device is opened at a bottom portion of the container and outside the container. A first siphon pipe formed in an inverted U-shape higher than the predetermined water level, and connected to the first siphon pipe and having a height from a continuous portion of the first siphon pipe,
A second siphon tube formed in an inverted U-shape at a height lower than double, and water supply means for supplying water to a falling portion of the first siphon tube and a rising portion between the second siphons; A humidifier drainage device. 2. A humidifier drainage device for discharging water from a humidifier, wherein water contained in the container and maintained at a predetermined water level is evaporated by a heating means, wherein the drainage device is opened at a bottom portion of the container and outside the container. It has a siphon pipe formed in an inverted U-shape higher than the predetermined water level, and water jetting means for jetting water at a predetermined flow rate and flow rate in a falling direction at a falling portion of the siphon pipe. Humidifier drainage device.