A hysteresis formaldehyde concentration automatic control method
A hysteresis and formaldehyde technology, applied in the field of automatic control of hysteresis formaldehyde concentration, can solve the problems of large formaldehyde concentration error, cumbersome operation process, unstable formaldehyde concentration, etc., and achieve the effect of precise and stable control and simple operation
Active Publication Date: 2018-03-02
浙江锌芯友好环境材料科技有限公司
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Problems solved by technology
This operation method has the problems of cumbersome operation process and large formaldehyde concentration error; moreover, the final formaldehyde concentration is unstable and the reproducibility is difficult to guarantee
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[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.
[0021] Example.
[0022] see Figure 1 to Figure 2 , The devices used in the hysteresis formaldehyde concentration automatic control method in this embodiment include PLC1, test chamber 3, formaldehyde concentration on-line detector 4, data processing module 6, operation table 30 and formaldehyde generation execution device 31.
[0023] The steps of the hysteresis formaldehyde concentration automatic control method in the present embodiment are as follows: inject formaldehyde in the test chamber 3, detect the formaldehyde concentration in the test chamber 3 by the formaldehyde concentration online detector 4, when the formaldehyde concentration in the test chamber 3 When the concentration is higher than the target ...
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The invention relates to a hysteresis formaldehyde concentration automatic control method. At present, it is necessary to develop a hysteresis formaldehyde concentration control method to ensure accurate and stable control of the concentration range of formaldehyde in a specific environment. The steps of the present invention are as follows: inject formaldehyde into the test chamber, detect the formaldehyde concentration in the test chamber by the formaldehyde concentration online detector, until the formaldehyde concentration in the test chamber reaches the target concentration, by using the constantly changing actual situation in the test chamber Formaldehyde concentration is combined with PLC to control the addition rate of formaldehyde to overcome the hysteresis problem of formaldehyde concentration change in the test chamber, so that the formaldehyde concentration in the test chamber can be maintained at the target concentration. The invention overcomes the influence of the formaldehyde concentration in the gas generated by the formaldehyde generating and executing device and the instability of the air flow in the test chamber caused by the adsorption of the inner wall of the test chamber and the leakage problem during the preliminary preparation process of the test chamber with a specific formaldehyde concentration. The problem of hysteresis in the control of internal formaldehyde concentration.
Description
technical field [0001] The invention relates to a hysteresis formaldehyde concentration automatic control method, which is mainly used in a test cabin for formaldehyde removal detection of an air purifier. Background technique [0002] In the detection of the purification performance of the air purifier, the purification performance of formaldehyde is an important performance parameter of the air purifier. According to the requirements of the national standard, in the process of testing the formaldehyde removal performance of the air purifier, it is necessary to use 30m 3 The test chamber requires that the initial concentration in the test chamber be maintained within a fixed range each time. In actual operation, due to various reasons, such as the absorption of formaldehyde on the inner wall of the test chamber, it is difficult for this part of formaldehyde to enter the In the air of the test chamber; if there is a leak in the test chamber itself, it will reduce the total ...
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IPC IPC(8): G05D11/13G05B19/05
Inventor 黄建国胡灯红常金虎
Owner 浙江锌芯友好环境材料科技有限公司