TW202040068A - Drying system and control method thereof - Google Patents

Abstract

A drying system and a control method adapted to the drying system are provided. The drying system includes a gas extraction module, a control module and a sensing module. The gas extraction module, the control module and the sensing module are electrically connected to each other, and the gas extraction module is connected to a cavity. The control method includes the control module driving the gas extraction module to extract gas inside the cavity out thereof; the sensing module ionizing the remaining gas inside the cavity to gain a gas data, and transmitting the gas data to the control module; and the control module determining whether the gas data meets a predetermined standard. When the gas module does not meet the predetermined standard, the control module controls the gas extraction module to keep extracting the remaining gas inside the cavity. When the gas data meets the predetermined standard, the control module terminates the gas extraction module.

Description

Drying system and control method

The invention provides a drying system and a control method suitable for the drying system.

Drying is a common unit operation process in industry. Generally speaking, the operator places the object to be dried in a drying chamber, and vaporizes the moisture in the solid by heating and discharges it from the inside or surface of the object to be dried. However, some materials that are easily decomposed or oxidized after heating need to be dried at low temperature by means of reduced pressure or air extraction. In this environment, because the pressure in the drying chamber is lower than the general atmosphere, it is difficult for general hygrometers to determine the dry matter. Therefore, it is impossible to know whether the drying process is completed.

The invention provides a drying system and a control method suitable for the drying system, which can judge the humidity state of the object to be dried and control the drying process to continue or stop.

The drying system of the present invention includes a control module, an air extraction module and a sensing module. The air extraction module is electrically connected to the control module and connected to a cavity. The sensing module is electrically connected to the control module and connected to the cavity.

The control method of the present invention is suitable for the above-mentioned drying system. The control method includes the control module driving the air extraction module to extract the gas inside the cavity, and the sensing module ionizes the residual gas inside the cavity to obtain a gas data , And transfer the gas data to the control module, and the control module determines whether the gas data meets a predetermined standard. When the control module determines that the gas data does not meet the predetermined standard, the control module controls the air extraction module to continue to extract the residual gas inside the cavity; when the control module determines that the gas data meets the predetermined standard, the control module terminates the operation of the air extraction module .

In an embodiment of the present invention, the pumping module includes a gas pump and a pumping pipeline, and the pumping pipeline is connected to the gas pump and the cavity.

In an embodiment of the present invention, the sensing module includes a trace gas analyzer and a pressure sensor.

In an embodiment of the present invention, the control method further includes connecting the gas pump to the cavity through an exhaust line.

In an embodiment of the present invention, the control method further includes ionizing the residual gas inside the cavity by a trace gas analyzer and analyzing a gas ion charge-to-mass ratio of the residual gas to obtain the partial pressure of each component gas of the residual gas. The pressure sensor senses a gas pressure of the residual gas, and the control module calculates a weight percentage of the elements constituting each component gas according to the gas pressure and the partial pressure of each component gas, wherein the gas data includes weight percentage.

In an embodiment of the present invention, the control method further includes the control module calculating the weight percentage of one carbon element, the weight percentage of one hydrogen element, and the weight percentage of one oxygen element in each component gas according to the gas pressure and the partial pressure of each component gas. The weight percentage and the weight percentage of a water molecule, wherein the predetermined standard includes at least one of the weight percentage of carbon element, the weight percentage of hydrogen element, the weight percentage of oxygen element, and the weight percentage of water molecule.

In an embodiment of the present invention, the weight percentage of carbon element is 0.05%, the weight percentage of hydrogen element is 0.05%, the weight percentage of oxygen element is 0.005%, and the weight percentage of water molecule is 0.0001%.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

Fig. 1 is a block diagram of a drying system according to an embodiment of the present invention, and Fig. 2 is a flow chart of steps of a control method according to an embodiment of the present invention. Please refer to Figs. 1 and 2. The control method of this embodiment is applicable to a drying system 10, which includes an air extraction module 100, a control module 200, and a sensing module 300, wherein the air extraction module 100, the control module 200, and the sensing module The test modules 300 are electrically connected to each other, and the air extraction module 100 is connected to a cavity 400.

Specifically, the air extraction module 100 includes a gas pump 120 and an air extraction line 140, wherein the air extraction line 140 is used to connect the gas pump 120 and the cavity 400. When the user wants to dry an object to be dried, or wants to reduce the humidity in the cavity 400, the object to be dried can be placed in the cavity 400, and the gas pump 120 is connected to the cavity through the suction line 140 400. The drying system 10 is restarted. At this time, the control module 200 drives the air extraction module 100 to extract the gas from the cavity 400 (step S01). During the pumping process, the gas molecules inside the cavity 400 will gradually decrease. After a certain period of time has elapsed, the sensing module 300 ionizes the gas inside the cavity 400 to obtain a gas data, and The gas data is transferred to the control module 200 (step S02).

In detail, the sensing module 300 of this embodiment includes a residual gas analyzer (Residual Gas Analyzer, RGA) 320, where the trace gas analyzer 320 can ionize the residual gas inside the cavity 400 and analyze the residual gas The gas ion charge-to-mass ratio. Since the charge-to-mass ratios of different components of the residual gas are different from each other, the partial pressure of each component gas of the residual gas can be further obtained. When the pressure inside the cavity 400 decreases, the pressure dew point will also decrease. Therefore, the to-be-dried or the fine water droplets inside the cavity 400 will be easier to vaporize into water vapor, and be ionized by the general air. The trace gas analyzer 320 analyzes and detects. At this time, the control module 200 calculates the weight percentage of carbon element, the weight percentage of hydrogen element, the weight percentage of oxygen element, and the weight percentage of water molecules of each component gas according to the gas pressure and the partial pressure of each component gas, and judges this Whether the gas data meets a predetermined standard (step S03). Wherein, the predetermined standard includes at least one of the weight percentage of carbon element, the weight percentage of hydrogen element, the weight percentage of oxygen element, and the weight percentage of water molecule. In this embodiment, the weight percentage threshold of each element or molecular component is set: Carbon element 0.05%, hydrogen element 0.05%, oxygen element 0.05%, and water molecule 0.0001%. Although the above ratios are optimized results obtained after many experiments, the present invention is not limited to this. For the target dryness, the above-mentioned weight percentage threshold can also be adjusted to other values.

When the control module 200 determines that the gas data does not meet the predetermined standard, that is, the composition of each element or molecule is not lower than the individually set threshold, the control module 200 will control the air extraction module 100 to continue to remove the residual inside the cavity 400 The gas is pumped out, so that the small water droplets inside the cavity 400 continue to volatilize into moisture, thereby achieving the drying effect; when the control module 200 determines that the gas data meets the predetermined standard, that is, the composition of each element or molecule is lower than the threshold set separately At this time, it means that the dryness inside the cavity 400 has reached the predetermined target. At this time, the control module 200 will terminate the operation of the air extraction module 100 (step S04), and complete the entire drying process.

In summary, the drying system and control method of the present invention can obtain gas data by extracting the gas inside the cavity and ionizing the residual gas inside the cavity, and determine whether the gas data meets the predetermined standard, and can be dried at low temperature. In an environment where the hygrometer is replaced, the dryness of the object to be dried or the cavity is accurately grasped, which greatly increases the application range and accuracy of the drying process. The foregoing descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the present invention.

10: Drying system 100: Air extraction module 120: Gas pump 140: suction line 200: control module 300: Sensing module 320: Trace gas analyzer 340: Pressure sensor 400: Cavity S01, S02, S03, S04: steps

Figure 1 is a block diagram of a drying system according to an embodiment of the present invention. Figure 2 is a flow chart of the control method of an embodiment of the present invention.

10: Drying system

100: Air extraction module

120: Gas pump

140: suction line

200: control module

300: Sensing module

320: Trace gas analyzer

340: Pressure sensor

400: Cavity

Claims (10)

A control method is suitable for a drying system. The drying system includes an air extraction module, a control module, and a sensing module, wherein the air extraction module, the control module, and the sensing module are electrically connected to each other. And the air extraction module is connected to a cavity, the control method includes: The control module drives the air extraction module to extract the gas inside the cavity; The sensing module ionizes the residual gas inside the cavity to obtain a gas data, and transmits the gas data to the control module; and The control module determines whether the gas data meets a predetermined standard; Wherein, when the control module determines that the gas data does not meet the predetermined standard, the control module controls the air extraction module to continue to extract the residual gas inside the cavity; wherein, when the control module determines the gas data When the predetermined standard is met, the control module terminates the operation of the air extraction module. The control method according to claim 1, wherein the air extraction module includes a gas pump and an air extraction pipeline, and the control method further includes: The gas pump is connected to the cavity through the gas extraction pipeline. The control method according to claim 1, wherein the sensing module includes a trace gas analyzer and a pressure sensor, and the control method further includes: The trace gas analyzer ionizes the residual gas in the cavity and analyzes a gas ion charge-to-mass ratio of the residual gas to obtain the partial pressure of each component gas of the residual gas; The pressure sensor senses a gas pressure of the residual gas; and The control module calculates a weight percentage of the elements composing each component gas according to the gas pressure and the partial pressure of each component gas, wherein the gas data includes the weight percentage. The control method according to claim 3, wherein the control module calculates the weight percentage of the elements constituting each of the constituent gases according to the gas pressure and the partial pressure of each of the constituent gases, including: The control module calculates the weight percentage of a carbon element, a weight percentage of a hydrogen element, a weight percentage of an oxygen element, and a weight percentage of a water molecule of the composition gas according to the gas pressure and the partial pressure of each of the constituent gases , Wherein the predetermined standard includes at least one of the weight percentage of the carbon element, the weight percentage of the hydrogen element, the weight percentage of the oxygen element, and the weight percentage of the water molecule. The control method according to claim 4, wherein the weight percentage of the carbon element is 0.05%, the weight percentage of the hydrogen element is 0.05%, the weight percentage of the oxygen element is 0.005%, and the weight percentage of the water molecule is 0.0001% . A drying system, including: A control module; An air extraction module electrically connected to the control module and connected to a cavity, the air extraction module being used to extract gas from the cavity; and A sensing module is electrically connected to the control module, the sensing module is connected to the cavity and used to ionize the residual gas inside the cavity to obtain a gas data, and transmit the gas data To the control module; Wherein, the control module is used to determine whether the gas data meets a predetermined standard, and when the control module determines that the gas data does not meet the predetermined standard, the control module controls the air extraction module to continue The residual gas is pumped out; when the control module determines that the gas data meets the predetermined standard, the control module terminates the operation of the pumping module. The drying system according to claim 6, wherein the air extraction module includes: A gas pump; and A gas pumping pipeline is connected to the gas pump and the cavity. The drying system according to claim 6, wherein the sensing module includes a trace gas analyzer and a pressure sensor, and the trace gas analyzer is used to ionize the residual gas in the cavity and analyze the The gas ion charge-to-mass ratio of the residual gas inside the cavity is used to obtain the partial pressure of each component gas of the residual gas, the pressure sensor is used to sense a gas pressure of the residual gas, and the control module is based on The gas pressure and the partial pressure of each of the constituent gases are calculated to calculate a weight percentage of the elements constituting each of the constituent gases, wherein the gas data includes the weight percentage. The drying system according to claim 8, wherein the control module calculates a weight percentage of a carbon element, a weight percentage of a hydrogen element, and a weight percentage of each of the constituent gases according to the gas pressure and the partial pressure of each constituent gas The weight percentage of the element and the weight percentage of a water molecule, and the predetermined standard includes at least one of the weight percentage of the carbon element, the weight percentage of the hydrogen element, the weight percentage of the oxygen element, and the weight percentage of the water molecule. The drying system according to claim 9, wherein the weight percentage of the carbon element is 0.05%, the weight percentage of the hydrogen element is 0.05%, the weight percentage of the oxygen element is 0.005%, and the weight percentage of the water molecule is 0.0001% .

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