JPH06169993A - Electrode type steam humidifier - Google Patents

Abstract

PURPOSE:To make it possible to continue an operating motion stably by preventing or suppressing generation of bubbles in a steam cylinder. CONSTITUTION:An electrode rod type steam humidifier having a construction wherein a detecting part detecting bubbles generated in a steam cylinder 1 is provided in the steam cylinder 1, a control of closing a feed water valve for the steam cylinder and also opening a drain valve is executed by a water level control circuit 15 according to a detection signal from the bubble detecting part and forced draining is conducted every time when the bubbles are generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode type steam humidifier for generating steam by generating heat by energizing a pair of electrode rods facing each other in water in a cylinder.

[0002]

2. Description of the Related Art An electrode type steam humidifier is used by directly spraying steam generated in a cylinder in an air conditioner, a duct, or a room. Therefore, as the water level in the cylinder lowers due to steam discharge, water is supplied to the cylinder as needed, and continuous use of the device is planned. In such an electrode type humidifier, bubbles may be generated in the steam cylinder due to the quality of water supplied to the cylinder. When this bubble occurs, the water level in the steam cylinder is apparently higher than normal due to the bubble, and abnormal signal detection etc. at the water level that is not normally detected activates to cause malfunction or false alarm. was there.

Therefore, conventionally, some means have been proposed in order to prevent or suppress the generation of bubbles in the electrode type steam humidifier. As one of them, there is a method of preventing erroneous detection by moving the water detection part from a steam cylinder and providing an independent blower which prevents bubbles from being mixed. However, according to this method, there is a risk that the water level in the blower relocated for water level detection will fluctuate due to static pressure from the air conditioner, duct, etc. to which steam is supplied, and this may cause malfunctions in water level detection. I'm worried. Moreover, according to this method, even if bubbles are generated in the cylinder, the device continues to operate as it is,
There were also problems such as water droplets splashing into the air conditioner and its duct due to the bumping phenomenon in the cylinder and rising water level due to bubbles. Of course, there was an economic disadvantage in that a separate blower cylinder for water level detection that was connected to the steam cylinder was required.

On the other hand, another conventional means is to provide a function (setting blow function) of opening a drain valve at an arbitrary predetermined time under the construction of an electric control circuit, thereby providing a function in a steam cylinder. By forcibly draining water every predetermined time, deterioration of water quality in the cylinder is prevented and generation of bubbles is suppressed. According to this method, it is not necessary to provide another cylinder other than the steam cylinder first, and the humidifier can be downsized and the cost can be reduced. On the other hand, forced drainage of the cylinder water can be performed at predetermined intervals. It is uneconomical to make effective use of water to do. Further, in this method, since the steam is not efficiently generated in the cylinder because the water is drained while supplying water into the cylinder during the drainage operation, this type of electrode requires a certain time from the start of operation until the steam is stably supplied. As the steam humidifier, the amount of steam is reduced each time the waste water is discharged, and thus it is difficult to supply a stable amount of steam during continuous operation.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is therefore to develop an apparatus which eliminates the drawbacks of the conventional means for preventing the inconvenience caused by the bubbles generated in the cylinder in this kind of electrode rod type steam humidifier. .

[0006]

To achieve this object, the present invention provides a steam cylinder having a pair of electrode rods internally provided with a water level detection sensor and a bubble detection sensor, and the steam cylinder A solenoid valve for water flow control and a solenoid valve for drainage control are provided in each water supply / drainage channel, and the solenoid valve for water supply control of the solenoid valve is closed by the detection signal from the bubble detection sensor to close the solenoid valve for drainage control. Provided is an electrode-type steam humidifier configured to perform forced drainage of the inside of the cylinder every time a bubble is generated, under the control of a control circuit that opens. In this case, with respect to the pair of electrode rods facing each other at the in-cylinder height position submerged in the normal water level state of the steam cylinder, the bubble detection sensor is a sensor electrode arranged near the steam port of the steam cylinder. Effective to configure.

[0007]

Operation: Water is injected into the steam cylinder until the water level detection sensor detects the normal water level when the water supply side solenoid valve is opened. The injected water in the cylinder is heated by the energization of the electrode rods facing each other in a set of water, resulting in the generation of steam. The bubble detection sensor detects the generation of bubbles associated with the generation of steam in the cylinder and outputs a signal to the control circuit. The control circuit functions to close the solenoid valve for supplying water to the cylinder and open the solenoid valve for draining water based on preset program control when the signal is output. Then, with respect to the pair of electrode rods in the cylinder, by configuring a bubble detection sensor with a sensor electrode disposed near the vapor port of the cylinder, the potential difference between the bubble detection sensor and the electrode rod is used as a detection signal. Can be output.

[0008]

EXAMPLES Next, examples of the present invention will be described in detail. 1 is a block diagram showing an embodiment of the present invention, in which 1 is a steam cylinder having a steam port 3 for connecting a steam hose 2 at its upper part, and a water supply channel 4 and a drain channel 5 at its bottom part. It has a water passage 6 for connection, and inside it is arranged a pair of electrode rods 7 and 8 which are normally below the water level and face each other in water. Further, inside the cylinder 1, there is provided a water level detection sensor 9 composed of a sensor electrode hung from above to the water surface, and a bubble detection sensor 10 composed of another sensor electrode near the vapor port 3. It is provided. On the other hand, a water supply control solenoid valve 11 is serially inserted and connected to the water supply passage 4, and a drainage control solenoid valve 12 is serially inserted and connected to the drainage passage 5.

The other end of the steam hose 2 is incorporated into an air conditioner, a packaged air conditioner, a duct, etc.,
A steam spray pipe 13 for spraying steam into the air stream is connected. Each pole wire of a power supply 14 is connected to each of the electrode rods 7 and 8, and a water level sensor 9 is connected to the other pole of the electrode rod 8 side connection which is one curve of a signal inlet to the water level control circuit 15. A wire is connected, and further, a signal input line to the forced blow circuit 16 is connected to the foam detection sensor 10. Then, the control output line of the water level control circuit 15 is
It is connected to the water supply control solenoid valve 11 together with the control output line of the forced blow circuit 16, while the drainage control solenoid valve 12 is connected to another control output line of the forced blow circuit 16.

According to the embodiment of the present invention having such a structure, water is injected into the steam cylinder 1 while the solenoid valve 11 for water supply is opened prior to the operation of the apparatus, and the water level in the cylinder is detected by the water level detection sensor. A predetermined amount of water detected at 9 is stored in the cylinder 1. In this state, the pair of electrode rods 7 and 8 in the cylinder 1 face each other in water, and when a current from the power source 14 is applied to these electrode rods 7 and 8, the water in the cylinder itself becomes a heating element. As it produces warm steam. The generated steam is discharged from the steam spray pipe 13 through the steam port 3 through the steam hose 2. Then, the water in the cylinder that gradually decreases due to the evaporation of water vapor opens the water supply control solenoid valve 11 according to the control program of the water level control circuit 15 that operates by the information signal from the water level sensor 9 that detects the decrease in the water level. By supplying water to the inside of the cylinder through the water supply passage 4, the water is successively compensated so that the water level is normal.

In the case where bubbles are generated on the water surface in the cylinder due to compression of the impurity concentration in the water in the cylinder, etc., during the course of continuous operation, the bubbles are generated by the steam outlet 3
When reaching the height of the water level sensor 9 in the vicinity, the sensor 9 detects a change in the potential difference between the electrode rod 7 or 8 and the sensor 9 which is equal to or more than a certain value, and uses this as a detection signal to force the blow circuit 16 Is operated according to the control program to open the electromagnetic valve 12 for drainage control to discharge the water in the cylinder through the drainage path 5. At this time, the water supply control solenoid valve 11 is closed to perform the drainage treatment while the injection of new water into the cylinder is temporarily stopped, and the energization to the electrode rods 7 and 8 is stopped during the drainage treatment. To control.

As a result, the water in the cylinder is drained, and the height position of bubbles on the water surface is also lowered. This state is controlled by the bubble detection sensor 10 (reduction control of the potential difference) to restore the circuit 16, and the drain control solenoid valve 12 is closed and the water supply control solenoid valve 11 is opened to inject water into the cylinder. The power supply to the rods 7 and 8 is restarted, and the series of draining operations in the operating state is completed. In addition, the drainage condition and the operation restart condition in this series of drainage operations are the same as those in each circuit 1 described above.
Several control patterns are possible depending on the configuration of the control programs 5 and 16.

For example, some examples are as follows. 1. 1. Control to detect bubbles by detecting the potential difference between the bubble detection sensor in the steam cylinder and the inner electrode rod, and perform drainage control when the potential difference exceeds a certain level. 2. Controlling the bubble detection by detecting the potential difference between the bubble detection sensor in the steam cylinder and the inner electrode rod, and discharging the bubble when the bubble generation time at this time exceeds a certain time. For bubble detection, the potential difference between the bubble detection sensor inside the steam cylinder and the electrode rod inside the same is detected, and the potential difference is above a certain level,
Also, control for draining when the bubble detection time exceeds a certain time. For bubble detection, the potential difference between the bubble detection sensor inside the steam cylinder and the electrode inside the same is detected, and the potential difference is an arbitrary value, and the bubble detection time is more than a certain time determined according to the voltage of the bubble detection sensor. It is considered to be a practically effective control means to control the drainage when it becomes low.

[0014]

According to the humidifier of the present invention having such a structure, unlike the conventional device, the water level detecting cylinder is not used. Therefore, first of all, the humidifier from the air conditioner or the duct for supplying steam is not used. It is possible to continue stable operation without causing malfunction due to normal water level fluctuation due to pressure, and in the conventional device using the water level detection cylinder, the operation continued as it was even when bubbles occurred, so the bumping phenomenon There is a problem that water droplets are scattered into the air conditioning equipment or the duct due to the rise in the water level due to bubbles or bubbles, but this can be solved. At the same time, the humidifier of the present invention does not require the cylinder for detecting the water level, so that the device can be provided in a small size and at a low cost.

Further, according to the humidifier of the present invention, since the water is forcibly drained when the bubbles are generated, it is possible to prevent the deterioration of the water quality in the steam cylinder, prevent the bubbles from being generated, and prevent the malfunction due to the bubbles. In addition, it is economical in terms of effective use of water to control drainage only when bubbles occur, and draining water with high water utilization efficiency is possible by stopping water supply during this drainage control.

In particular, in the humidifier of the present invention, since forced drainage is performed when bubbles are generated, heat loss can be reduced without draining more than necessary, so that the humidity inside the cylinder is greatly reduced each time drainage occurs. The humidifier of the present invention can eliminate the above-mentioned drawbacks of the conventional apparatus and can be stably operated continuously, and the effect is extremely large for practical use. Is.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a humidifier of the present invention.

[Explanation of symbols]

 1 Steam Cylinder 3 Steam Port 4 Water Supply Channel 5 Drainage Channel 6 Water Flow Port 7, 8 Electrode Rod 9 Water Level Detection Sensor 10 Bubble Detection Sensor 11 Water Supply Control Solenoid Valve 12 Drainage Control Solenoid Valve 14 Power Supply 15 Water Level Control Circuit 16 Forced Blow Circuit

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[Procedure amendment]

[Submission date] January 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

Therefore, conventionally, some means have been proposed in order to prevent or suppress the generation of bubbles in the electrode type steam humidifier. One of them, by the water detection portion and transferred from the steam cylinder provide a separate cylinder which prevented the incorporation of bubbles, Ru way to prevent false positives Oh. However, according to this method, there is a risk that the water level in the blower relocated for water level detection will fluctuate due to static pressure from the air conditioner, duct, etc. to which steam is supplied, and this may cause malfunctions in water level detection. I'm worried. Further, according to this method, even if bubbles are generated in the cylinder, the device continues to operate as it is, so that water drops are scattered into the air conditioner and its duct due to the bumping phenomenon in the cylinder and the rise in the water level due to bubbles. There was also a problem with. Of course, there was an economic disadvantage in that a separate blower cylinder for water level detection that was connected to the steam cylinder was required.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

SUMMARY OF THE INVENTION The object of the present invention is therefore to develop an apparatus for eliminating the disadvantages of the conventional means for preventing the inconvenience caused by the bubbles generated in the cylinder in the electrode type vapor humidifier.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

The other end of the steam hose 2 is incorporated into an air conditioner, a packaged air conditioner, a duct, etc.,
A steam spray pipe 13 for spraying steam into the air stream is connected. Each pole wire of the power supply 14 is connected to the electrode rods 7 and 8, and the water level sensor 9 is connected to the other side of the electrode rod 8 side connection which is one pole wire of the signal inlet to the water level control circuit 15. A polar wire is connected, and further, a signal input wire to the forced blow circuit 16 is connected to the foam detection sensor 10. Then, the control output line of the water level control circuit 15 is
It is connected to the water supply control solenoid valve 11 together with the control output line of the forced blow circuit 16, while the drainage control solenoid valve 12 is connected to another control output line of the forced blow circuit 16.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

In the case where bubbles are generated on the water surface in the cylinder due to the compression of the impurity concentration in the water in the cylinder, etc., during the course of continuous operation, the bubbles are generated by the steam port 3
When reaching the height of the water level sensor 9 in the vicinity, the sensor 9 detects a change in the potential difference between the electrode rod 7 or 8 and the sensor 9 which is equal to or more than a certain value, and uses this as a detection signal to force the blow circuit 16 Is operated according to the control program to open the electromagnetic valve 12 for drainage control to discharge the water in the cylinder through the drainage path 5. At this time, the water supply control solenoid valve 11 is closed to perform the drainage treatment while the injection of new water into the cylinder is temporarily stopped, and the energization to the electrode rods 7 and 8 is stopped during the drainage treatment. To control.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

[0016] In particular, the present invention humidifier, since the forced water discharge in the event of a bubble, because it is possible to reduce heat loss without drainage unnecessarily, cylinder temperature each drainage <br/> The humidifier of the present invention is capable of stable continuous operation by eliminating the various drawbacks described in the beginning of the conventional device, such as being able to supply a stable amount of steam without greatly reducing the It is extremely large.

Claims (2)

[Claims] 1. A water level detection sensor and a bubble detection sensor are provided in a steam cylinder having a pair of electrode rods therein, and a water flow control solenoid valve and a drain control solenoid are provided in each water supply / drain passage of the steam cylinder. Each of the valves is provided with a control signal for closing the water supply control solenoid valve and opening the drainage control solenoid valve in response to a detection signal from the bubble detection sensor. An electrode type steam humidifier characterized by being configured to perform drainage. 2. A sensor electrode in which the bubble detection sensor is arranged near a steam port of the steam cylinder, with respect to the pair of electrode rods facing each other at an in-cylinder height position where the steam cylinder is submerged in a normal water level state. The electrode type vapor humidifier according to claim 1.