JP3000194U - Fluid dehumidifier operation monitoring device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an operation monitoring device for a fluid dehumidifier having a simple mechanism, few failures, a high cooling capacity, a quick start-up at the start of cooling, and an extremely high control accuracy. A monitoring device for monitoring the operating condition of a fluid dehumidifier using a cooling mirror surface 2 cooled by a Peltier element to a predetermined temperature near the dew point temperature of a dehumidifying fluid supplied from a fluid dehumidifying device. Is provided with a monitoring chamber 6 formed by covering at least a part thereof with a hood 5 which is a transparent member, and a heat dissipation chamber 11 formed by covering the heat dissipation portion 9 of the Peltier element 3 with a hood. Is provided with a supply port 7 and a discharge port 8 for the measurement fluid so that the air flows along the cooling mirror surface 2, and the heat radiation chamber 11 has a compressed air introduction port communicating with the compressed air supply source 13 via the flow rate control valve 14. The cold air extraction pipe 34 of the air refrigerator 12 having the eddy current generation chamber and the cold air extraction pipe communicating with the eddy current generation chamber through a small hole near the center of the vortex flow generation chamber is provided on the other side. Fluid removal characterized by Wet device operation monitoring device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operation monitoring device for a fluid dehumidifying device, and more particularly, a fluid dehumidifying device using a cooling mirror whose dew point of the dehumidifying fluid supplied from the fluid dehumidifying device is cooled to a predetermined temperature by a cooling means. The present invention relates to a monitoring device for a fluid dehumidifying device that monitors the operating status of the.

[0002]

[Prior art]

 Fluids such as compression equipment are generally used for control equipment of various devices. If the humidity of the fluid used for such a control device is high, water droplets may be generated inside the control device and the like, which may lead to an unexpected situation such as uncontrollability. In order to avoid such a situation, a fluid dehumidified by the dehumidifier is usually supplied to the control device and the like. However, if the dehumidifying device malfunctions or its function deteriorates, or if the humidity in the inhaled fluid drawn into the dehumidifying device rises, the humidity of the dehumidifying fluid supplied from the dehumidifying device also rises, and the control equipment There is a risk of water droplets being generated inside such as. For this reason, conventionally, in order to monitor the operating status of the dehumidifier, it is necessary to monitor the dew point temperature of the dehumidifying fluid supplied from the dehumidifier and prevent the situation in which fluid with a humidity above the permissible level is supplied to control equipment, etc. There is.

By the way, as an apparatus for monitoring the dew point temperature of the dehumidifying fluid, Japanese Patent Publication No. 2-26059 discloses detecting the dehumidifying fluid temperature and the dew point temperature, and detecting each of the temperatures by an oxide thin film type dew point detector. There has been proposed a device for converting into an electric signal by using and issuing an alarm when the difference between the two approaches a predetermined value. Further, Japanese Patent Publication No. Sho 62-9854 proposes a monitoring device for detecting the amount of transmitted light by using a photodetector for the dew condensation state on the cooling mirror surface.

[0004]

According to such a conventional monitoring device, it is possible to constantly monitor the dew point temperature of the dehumidifying fluid, and to prevent a situation in which a fluid having an unacceptable humidity is supplied to a control device or the like. However, the conventional monitoring device employs an electronic complicated mechanism so that the dew point temperature of the dehumidifying fluid can be constantly monitored. For this reason, the price of the monitoring device becomes expensive, and if a failure occurs in the monitoring device, it will be difficult to find the failure, and there is a concern that the failure detection of the dehumidifier will be delayed. On the other hand, there are many cases where it is not necessary to constantly monitor the dehumidifying fluid. In addition, it is extremely rare that the dehumidification capacity of the dehumidifier will drop sharply. For this reason, there has been a demand for a monitoring device that has a simple mechanism of the monitoring device, has few failures, and can be easily found even if a failure occurs.

[0005]

[Means for Solving the Problems]

 That is, the present invention is a monitoring device for monitoring the operating condition of a fluid dehumidifying device by using a cooling mirror surface cooled by a Peltier element at a predetermined temperature near the dew point temperature of the dehumidifying fluid supplied from the fluid dehumidifying device. A monitoring chamber formed by covering at least a part of the cooling mirror surface with a transparent hood and a heat radiation chamber covering the heat radiation portion of the Peltier element are provided. In the monitoring chamber, fluid flows along the cooling mirror surface. As described above, a measurement fluid supply port and a discharge port are provided, and the radiating chamber has a swirl flow generation chamber having a compressed air introduction port communicating with a compressed air supply source through a flow rate control valve, and the other side, An operation monitoring device for a fluid dehumidifying device, characterized in that a cold air extraction pipe of an air refrigerator having a cold air extraction pipe communicating with the swirl generation chamber through a small hole near the center of the swirl generation chamber is connected. To That.

[0006]

[Action]

 According to the present invention, whether or not the dew point temperature of the measured fluid is equal to or lower than the planned dew point temperature by visually observing the presence or absence of fog on the cooling mirror surface cooled to a temperature at which the surface of the dehumidified fluid is near the planned dew point and does not fog. It is possible to easily confirm whether or not it is possible to easily judge the operating status of the dehumidifier. In other words, if clouding is observed on the cooling mirror surface, it means that the dew point temperature of the measured fluid exceeds the planned dew point temperature, and the function of the dehumidifier is deteriorated. Further, the monitoring device of the present invention does not require a device for automatically detecting the presence or absence of fog on the cooling mirror surface, and can simplify the device structure. Further, according to the present invention, the cooling capacity of the Peltier element can be dramatically improved by the air refrigerator, and even when monitoring the measured fluid having a low dew point, the cost is low and the failure does not occur. Can be extremely small.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a schematic configuration diagram of a monitoring device of the present invention. In the monitoring device 1, a Peltier element covers a cooling mirror surface 3 made of a heat conductive material cooled to a temperature displayed on the temperature display unit 4 with a hood 5 to form a monitoring chamber 6. One surface of the hood 5 that covers the cooling mirror surface 3 is formed by the transparent plate 2 so that the state of the cooling mirror surface 3 can be visually observed from the outside of the hood. Further, a supply port 7 for supplying the measurement fluid is provided on one end side of the monitoring chamber 6, and a discharge port 8 is provided on the other end side. Therefore, the measurement fluid supplied from the supply port 7 flows along the cooling mirror surface 2 and is discharged into the atmosphere from the discharge port 8. At this time, by providing the throttle 19 at the supply port 7, the flow rate of the measurement fluid flowing into the monitoring chamber 6 can be suppressed and the inside of the monitoring chamber 6 can be brought to the atmospheric pressure state. In this way, when the inside of the monitoring room 6 is in the atmospheric pressure state, the thickness of the hood 5 and the like can be reduced, and the monitoring device 1 can be reduced in weight.

Further, in the embodiment of the present invention, a radiation fin group 9 is provided on the rear end side of the Peltier element as a cooling means for cooling the heat generated as a result of cooling the cooling mirror surface 2. Then, the heat radiation chamber 11 is formed by covering the heat radiation fin group 9 serving as the heat radiation portion of the Peltier element 3 with the hood 10 to which a heat insulating material such as foamed plastic is attached. Next, as shown in FIGS. 2 and 3, the vortex flow generating chamber 30 having the compressed air inlet 31 and a small hole 33 on one side of the vortex flow generating chamber 30 near the center of the vortex flow generating chamber 30. An air refrigerator 12 (for example, a product name “spiral cooler” manufactured by Orion Machinery Co., Ltd.) having a cold air extraction pipe 34 communicating with the vortex flow generating chamber 30 is provided. In the air refrigerator 12, the compressed air source 13 and the compressed air inlet 31 are communicated with each other via the flow rate control valve 14, and the cold air extraction pipe 34 is communicated with the heat dissipation chamber 11. In the air refrigerator 12 having such a configuration, the air flows into the peripheral edge of the swirl generating chamber 30 from the compressed air introduction port 31 provided so as to be oriented in the tangential direction of the chamber at a speed higher than the speed of sound. Due to the centrifugal force, the air that has become a high-speed vortex in the vortex generation chamber 30 undergoes adiabatic expansion in the vicinity of the center of the vortex and adiabatic compression in the vicinity of the vortex, generating cold air near the center of the chamber and generating small air. It is sent out from the hole 33 to the cold air extraction pipe 34, taken out of the machine from the cold air extraction port 34a, and is sent to the inside of the heat dissipation chamber 11 via the connection tube.

In addition, a temperature sensor 15 a for detecting the temperature of the mirror surface 2 is attached in the heat transfer body near the mirror surface 2, and the temperature sensor 15 a is installed in the heat radiating chamber 11 in the vicinity of a communicating portion with the cold air blowing pipe 34 of the air refrigerator 12. Are equipped with temperature sensors 15b for detecting the temperature inside the heat dissipation chamber 11, respectively. Then, the control device controls the Peltier device 3 so that the detected value approaches the predetermined temperature set from the target dew point of the compressed air based on the detected value of the temperature sensor 15a. The control is performed by a method such as changing the value of the current supplied to the Peltier element or changing the duty ratio of the pulse current. At the same time, based on the value of the temperature sensor 15b near the cool air outlet 17, the control device 16 controls the opening degree of the flow control valve 14 of the air refrigerator, so that the cooling air temperature in the cold air extraction pipe 34 is controlled by the Peltier element. Keep the temperature near the specified cooling temperature. As a result, the temperature inside the heat dissipation chamber 11 is made as close as possible to the predetermined target temperature. If a small hole 18 that opens to the outside air is provided in the heat dissipation chamber 11 at a position separated from the cold air outlet 17, the heat-exchanged warm air is discharged, so that heat dissipation is promoted.

As described above, the heat carried to the high temperature side of the Peltier element 3 is quickly dissipated, and the cooling mirror surface by the Peltier element is also cooled very quickly. In addition, although the control error may increase with an air chiller alone, a Peltier element with high control accuracy is basically used in combination, so that ultimately high control accuracy can be obtained.

According to the working fluid monitoring apparatus 1 as described above, the supply fluid A to the dehumidifying fluid and the dehumidifying fluid B discharged from the dehumidifying apparatus are supplied to the chamber 6 on the cooling mirror surface 2. Therefore, it is possible to monitor that the dehumidifier is operating normally. For example, if the temperature of the cooling mirror surface 2 is set to the lowest dew point of the dehumidifying fluid B, the cooling mirror surface 2 forming a part of the floor surface of the monitoring chamber 6 through which the supply fluid B passes normally dehumidifies. If the dehumidifier is not operating normally, the dew point will be lowered, and dew condensation will occur on the cooling mirror surface 2.

Next, another embodiment will be described. A vertical partition (not shown) is provided on the hood 5 to divide the monitoring room into two rooms 6a and 6b. Further, supply ports 7a and 7b for supplying the measurement fluid are provided on one end side of each chamber, and discharge ports 8a and 8b are provided on the other end side. Then, the supply fluid B to the dehumidifying fluid and the dehumidifying fluid A after passing through the dehumidifying apparatus are supplied to the respective chambers 6a and 6b that divide the cooling mirror surface 2, so that the dehumidifying apparatus operates normally. Monitor what you are doing. For example, if the temperature of the cooling mirror surface 2 is set to be higher than the planned dew point temperature of the dehumidifying fluid B by about 1 to 2 ° C., if the dehumidifying device is operating normally, the monitoring chamber 6a through which the supply fluid A passes passes. The portion of the cooling mirror surface 2 forming a part of the floor surface is clouded, but the portion of the cooling mirror surface 2 forming a part of the floor surface of the monitoring chamber 6b through which the dehumidifying fluid B passes does not fog. This makes it possible to confirm that the dehumidifier is operating normally. If the dehumidifier is not operating normally, the cooling mirror surfaces in both the monitoring rooms 6a and 6b will become cloudy.

[0013]

【effect】

 As described above, according to the operation monitoring device of the fluid dehumidifying device of the present invention, the mechanism of the monitoring device is simple and there are few failures, and even if a failure occurs, it can be easily found. Moreover, the structure of the monitoring device can be simplified, and the manufacturing cost can be reduced. Furthermore, since an air refrigerator is used, the rise time is extremely quick, and since the temperature is adjusted by the Peltier element, the control accuracy is extremely high.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment according to the present invention.

FIG. 2 is a sectional view of an air refrigerator used in the monitoring device shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Operation Monitoring Device 2 Cooling Mirror Surface 3 Peltier Element 5 Hood 6 Monitoring Room 8 Measuring Fluid Supply Port 10 Hood 11 Radiating Room 12 Air Refrigerator 13 Compressed Air Source 14 Flow Control Valve 15a, 15b Temperature Sensor 16 Controller 30 Eddy Current Generation Chamber 31 Compressed air inlet 33 Small hole 34 Cold air outlet pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Yoshiyuki Miyashita 246 Kodaka, Suzaka City, Nagano Prefecture Orion Machinery Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A monitoring device for monitoring an operating condition of a fluid dehumidifying device by using a cooling mirror surface cooled by a Peltier element to a predetermined temperature near a dew point temperature of a dehumidifying fluid supplied from the fluid dehumidifying device. Is provided with a monitoring chamber formed by covering at least a part of the upper part thereof with a hood made of a transparent member, and a heat dissipation chamber covering a heat dissipation part of the Peltier element, and the monitoring chamber is configured so that a fluid flows along a cooling mirror surface. A measurement fluid supply port and a discharge port are provided, and the radiating chamber has a vortex flow generating chamber having a compressed air introduction port communicating with a compressed air supply source through a flow rate control valve, and the vortex flow generating chamber on the other side. An operation monitoring device for a fluid dehumidifying device, characterized in that a cold air extraction pipe of an air refrigerator, which has a cold air extraction pipe communicating with the swirl flow generation chamber through a small hole, is communicated with the cold air extraction pipe. 2. A temperature detector for detecting the temperature in the heat radiation chamber is provided in the heat radiation chamber, and the opening of a flow rate control valve communicating with the compressed air introduction port is adjusted based on the detection signal. The operation monitoring device for the fluid dehumidifying device according to claim 1.