Automatic control system of oxygen generating device

Abstract

The invention discloses an automatic control system of an oxygen generation device. The automatic control system comprises an oxygen concentration analysis detector, an oxygen analysis instrument 12V power module, an oxygen candle ignition 24V power module, an isolator, a PLC (Programmable Logic Controller) module and a touch screen, the oxygen concentration analysis detector is powered by a 12V power supply module of the oxygen analysis instrument; the isolator receives concentration information collected by the oxygen concentration analysis detector and transmits the concentration information to the PLC module; the oxygen candle ignition 24V power supply module is electrically connected with the PLC module and is used for controlling an oxygen candle in the oxygen generation device to ignite; the touch screen is powered by the PLC module; the oxygen concentration analysis detector detects the oxygen concentration in the closed space in real time, when the oxygen concentration is lower than a set concentration value, the PLC module controls the oxygen candle to ignite, and meanwhile whether the oxygen candle continues to be controlled to ignite or not is determined according to the size relation between the oxygen concentration in the closed space and the oxygen concentration during ignition in the oxygen release process of the oxygen candle. The oxygen concentration in the closed space is higher than the oxygen concentration during ignition. The oxygen supply is more reliable, and the safety is higher.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen supply, and in particular to an automatic control system for an oxygen generating device. Background Art

[0002] The oxygen generator automatic control system is a system that realizes automatic control of the oxygen production process. It is used to detect the oxygen concentration in a confined space environment and produce oxygen according to the oxygen concentration in the confined space.

[0003] Most of the current automatic control systems automatically release oxygen after detecting a low oxygen concentration in a closed environment. After the oxygen is released, the oxygen concentration is detected to determine whether to release oxygen again. This method may have a time delay problem, because it is necessary to wait until the oxygen is released before the concentration can be detected, which may lead to an untimely response to changes in oxygen concentration. Secondly, if the detection system does not respond fast enough or the accuracy is not high enough, it may lead to wrong judgments, making it impossible to accurately control the release of oxygen. Summary of the invention

[0004] In view of this, the present invention provides an automatic control system for an oxygen generating device, which has a more reliable oxygen supply and a higher safety.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An oxygen generating device automatic control system, comprising an oxygen concentration analysis detector, an oxygen analyzer 12V power module, an oxygen candle ignition 24V power module, an isolator, a PLC module and a touch screen;

[0007] The oxygen analyzer 12V power module, oxygen candle ignition 24V power module, isolator, and PLC module are all electrically connected to an external power supply through buttons and air switches; the oxygen concentration analyzer is powered by the oxygen analyzer 12V power module; the isolator receives the concentration information collected by the oxygen concentration analyzer and transmits it to the PLC module; the oxygen candle ignition 24V power module is electrically connected to the PLC module to control the ignition of the oxygen candle in the oxygen generator; the touch screen is powered by the PLC module;

[0008] The oxygen concentration analysis detector detects the oxygen concentration in the enclosed space in real time. When the oxygen concentration is lower than the set concentration value, the PLC module controls the ignition of the oxygen candle. At the same time, during the process of the oxygen candle releasing oxygen, it determines whether to continue to control the ignition of the oxygen candle according to the relationship between the oxygen concentration in the enclosed space and the oxygen concentration at the time of ignition, until the oxygen concentration in the enclosed space is higher than the oxygen concentration at the time of ignition.

[0009] Furthermore, the digital input common terminal and the digital output common terminal of the PLC module are connected to the negative pole of the oxygen candle ignition 24V power supply module, the digital input common terminal and the digital output common terminal of the PLC module are connected to the terminal at one end of the oxygen candle, and the terminal at the other end of the oxygen candle is connected to the positive pole of the oxygen candle ignition 24V power supply module.

[0010] Furthermore, the automatic control system also includes a reminder and alarm module, which is used to alarm when the oxygen concentration is lower than a set value, when the oxygen candle reserve is lower than a set value, or when all oxygen candles are used up.

[0011] Furthermore, an automatic mode button and a manual mode button are provided on the touch screen.

[0012] Furthermore, the PLC module provides a 24V power supply for the touch screen.

[0013] Furthermore, the automatic control system includes two working modes: automatic mode and manual mode;

[0014] In the automatic mode, the PLC module receives oxygen concentration information collected in real time by the oxygen concentration analyzer in the enclosed space. When the oxygen concentration is continuously lower than the set concentration value for 1 minute, the PLC module controls the ignition of the oxygen candle through the oxygen candle ignition 24V power supply module; at the same time, the PLC module automatically stores the oxygen concentration at the time of ignition. When the oxygen candle releases oxygen within 2 minutes, the oxygen concentration in the enclosed space remains unchanged or decreases compared to the oxygen concentration at the time of ignition, and the oxygen candle is controlled to ignite again, and the oxygen concentration at the time of ignition is stored again, until the oxygen concentration in the enclosed space is higher than the current oxygen concentration at ignition;

[0015] In the manual mode, the user manually selects to ignite the oxygen candle on the touch screen according to the oxygen concentration in the confined space.

[0016] Furthermore, the ignition interval speed is automatically adjusted according to the oxygen concentration in the confined space environment.

[0017] Beneficial effects:

[0018] 1. The present invention can detect the oxygen concentration in a confined space in real time. If it is lower than the set value, the oxygen candle will be automatically ignited to release oxygen. If the oxygen concentration in the confined environment does not rise within the specified time during the oxygen release process, the oxygen candle will continue to be ignited to release oxygen, thereby automatically and reliably supplying oxygen to the confined space to ensure the oxygen concentration in the confined space environment to avoid danger due to lack of oxygen. The present invention solves the problem of automatically starting the oxygen supply device to supply oxygen in the case of lack of oxygen in the confined space, so as to ensure that there is sufficient oxygen in the confined space and meet the oxygen needs of the people in the confined space.

[0019] 2. The present invention connects the digital quantity input common end and the digital quantity output common end of the PLC module to the negative pole of the oxygen candle ignition 24V power supply module and the oxygen candle terminal respectively. It can not only judge whether the oxygen candle is in use by detecting the on-off state of the circuit and detect the use of the oxygen candle in real time, but also ignite when oxygen is needed. Even if the user manually uses the oxygen candle in the power-off state, the system can still detect the use status of the oxygen candle when the power is on.

[0020] 3. In addition to being able to be manually controlled under power-on conditions, the present invention can also manually ignite oxygen candles to release oxygen under power-off conditions. This provides safety guarantees for users to use oxygen under a full range of conditions, and its purpose is to solve the safety, convenience, sustainability and reliability of oxygen supply in confined spaces.

[0021] 4. The present invention is provided with a reminder and alarm module. When the oxygen concentration is lower than the set value, the system will alarm; when the number of oxygen candles stored is lower than the set value, the system will alarm, indicating that the oxygen candle reserves are low and the user is requested to replace the oxygen candles, thereby ensuring that the user has a sufficient number of oxygen candles to use when in urgent need; if the oxygen candles are not replaced in time, the system will also alarm after all the oxygen candles have been used up, thereby providing further safety protection for the use of oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a circuit diagram of the present invention.

[0023] Figure 2 This is a flow chart of the working mode of the present invention. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0025] The invention provides an automatic control system for an oxygen generating device, comprising an oxygen concentration analysis detector, an oxygen analyzer 12V power supply module, an oxygen candle ignition 24V power supply module, an isolator, a PLC module and a touch screen.

[0026] like Figure 1As shown, the oxygen analyzer 12V power module, oxygen candle ignition 24V power module, isolator, and PLC module are all electrically connected to the external power supply through buttons and air switches; the external power supply is independently connected to the 12V power module, 24V power module, isolator, and PLC module to supply power, in order to prevent any of the unit modules from being damaged and affecting other electrical components and modules. The oxygen concentration analyzer is independently powered by the oxygen analyzer 12V power module, in order to prevent interference from other power supply signals. The isolator receives the concentration information collected by the oxygen concentration analyzer and transmits it to the PLC module; the oxygen candle ignition 24V power module is electrically connected to the PLC module to control the ignition of the oxygen candle in the oxygen generator. The 24V power module is used for signal acquisition and ignition of the oxygen candle. The reason why the 24V power module is used for oxygen candle ignition and signal acquisition is that a large current will be generated when the oxygen candle is ignited. The PLC module avoids the system from stopping or becoming unstable due to the large current when the oxygen candle is ignited, and avoids unstable display of the touch screen. Therefore, a 24V power module is selected separately, and if the 24V power module is lost, it is easy to replace. The touch screen is powered by the PLC module, which provides 24V power for the touch screen.

[0027] The circuit part adopts the resistance insurance on-off detection method, specifically: the PLC module digital input common end and digital output common end are connected to the negative pole of the oxygen candle ignition 24V power module, the PLC module digital input common end and digital output common end are connected to the terminal at one end of the oxygen candle, and the terminal at the other end of the oxygen candle is connected to the positive pole of the oxygen candle ignition 24V power module. Under normal working conditions, the use status of the oxygen candle can be detected, and the oxygen candle can be ignited when oxygen is needed. The advantage of this method is that the use of the oxygen candle can be detected in real time. Even if the user manually uses the oxygen candle in the power-off state, the system can still detect the use status of the oxygen candle when the power is turned on.

[0028] The automatic control system includes two working modes: automatic mode and manual mode; accordingly, an automatic mode button and a manual mode button are provided on the touch screen.

[0029] like Figure 2As shown, in automatic mode, the PLC module receives the oxygen concentration information collected by the oxygen concentration analyzer in real time from the confined space. When the oxygen concentration is lower than the set concentration value for 1 minute, the PLC module controls the ignition of the oxygen candle through the oxygen candle ignition 24V power supply module; at the same time, the PLC module automatically stores the oxygen concentration at the time of ignition. When the oxygen candle releases oxygen within 2 minutes, if the oxygen concentration rises compared to the oxygen concentration at the time of ignition, the next oxygen candle will not be ignited. If the oxygen concentration in the confined space remains unchanged or decreases compared to the oxygen concentration at the time of ignition, the oxygen candle will be controlled to ignite again, and the oxygen concentration at the time of ignition will be stored again, and so on, until the oxygen concentration in the confined space is higher than the oxygen concentration at the current ignition. The set concentration value can be 19%.

[0030] In manual mode, the user manually chooses to ignite oxygen candles on the touch screen according to the oxygen concentration in the confined space, and can choose oxygen candles at will to meet oxygen supply needs.

[0031] The automatic control system can also automatically adjust the ignition interval speed according to the oxygen concentration in the confined space, that is, adjust the ignition time of the oxygen candle to improve the efficiency of igniting the oxygen candle.

[0032] The automatic control system can also judge the oxygen candle reserves according to the number of ignited oxygen candles, and has an alarm function. It also includes a reminder and alarm module, which is used to alarm when the oxygen candle reserves are lower than the set value or when all the oxygen candles are used up. In this embodiment, the automatic control system is equipped with 7 oxygen candles. When it is detected that there are only 2 or less oxygen candles left in the system (the system defaults to 2 remaining, and the user can change it at will according to their own needs), the system will automatically prompt that the oxygen candle reserves are low and please replace the oxygen candles. When all the oxygen candles are used up, the system will prompt that the oxygen candles are used up.

[0033] Of course, the reminder and alarm module will also sound an alarm when the oxygen concentration is lower than the set value, that is, when the oxygen concentration is lower than 19%, and the oxygen concentration font and display box will change color to remind the user that the oxygen concentration in the current confined space is low, so as to more prominently remind the user of the oxygen content status of the confined space.

[0034] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oxygen generating device automatic control system, characterized in that: Including oxygen concentration analysis detector, oxygen analyzer 12V power module, oxygen candle ignition 24V power module, isolator, PLC module and touch screen; The oxygen analyzer 12V power module, oxygen candle ignition 24V power module, isolator, and PLC module are all electrically connected to an external power supply through buttons and air switches; the oxygen concentration analyzer is powered by the oxygen analyzer 12V power module; the isolator receives the concentration information collected by the oxygen concentration analyzer and transmits it to the PLC module; the oxygen candle ignition 24V power module is electrically connected to the PLC module to control the ignition of the oxygen candle in the oxygen generator; the touch screen is powered by the PLC module; The oxygen concentration analysis detector detects the oxygen concentration in the enclosed space in real time. When the oxygen concentration is lower than the set concentration value, the PLC module controls the ignition of the oxygen candle. At the same time, during the process of the oxygen candle releasing oxygen, it determines whether to continue to control the ignition of the oxygen candle according to the relationship between the oxygen concentration in the enclosed space and the oxygen concentration at the time of ignition, until the oxygen concentration in the enclosed space is higher than the oxygen concentration at the time of ignition.

2. The automatic control system of the oxygen generator according to claim 1, characterized in that: The digital input common terminal and digital output common terminal of the PLC module are connected to the negative pole of the oxygen candle ignition 24V power supply module, the digital input common terminal and digital output common terminal of the PLC module are connected to the terminal at one end of the oxygen candle, and the terminal at the other end of the oxygen candle is connected to the positive pole of the oxygen candle ignition 24V power supply module.

3. The oxygen generating device automatic control system according to claim 1, characterized in that: The automatic control system also includes a reminder and alarm module, which is used to alarm when the oxygen concentration is lower than a set value, when the oxygen candle reserve is lower than a set value, or when all oxygen candles are used up.

4. The automatic control system of the oxygen generator according to claim 1, characterized in that: An automatic mode button and a manual mode button are arranged on the touch screen.

5. The automatic control system of the oxygen generator according to claim 1, characterized in that: The PLC module provides 24V power supply for the touch screen.

6. The oxygen generating device automatic control system according to claim 1 or 4, characterized in that: The automatic control system includes two working modes: automatic mode and manual mode; In the automatic mode, the PLC module receives oxygen concentration information collected in real time by the oxygen concentration analyzer in the enclosed space. When the oxygen concentration is continuously lower than the set concentration value for 1 minute, the PLC module controls the ignition of the oxygen candle through the oxygen candle ignition 24V power supply module; at the same time, the PLC module automatically stores the oxygen concentration at the time of ignition. When the oxygen candle releases oxygen within 2 minutes, the oxygen concentration in the enclosed space remains unchanged or decreases compared to the oxygen concentration at the time of ignition, and the oxygen candle is controlled to ignite again, and the oxygen concentration at the time of ignition is stored again, until the oxygen concentration in the enclosed space is higher than the current oxygen concentration at ignition; In the manual mode, the user manually selects to ignite the oxygen candle on the touch screen according to the oxygen concentration in the confined space.

7. The automatic control system of the oxygen generator according to claim 6, characterized in that: The ignition interval speed is automatically adjusted according to the oxygen concentration in the confined space environment.

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