阅读说明：本技术 一种小流量分流式加湿控制模块 (Small-flow split-flow humidification control module ) 是由 韩广帅 丁磊 廖懿 李昕 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种小流量分流式加湿控制模块。本发明的技术方案是：一种小流量分流式加湿控制模块,包括气体主管道,所述气体主管道上串联连接有第一流量计以及自动阀门,所述自动阀门并联连接有旁路管道,所述旁路管道上串联连接有第二流量计以及加湿器,所述加湿器为鼓泡加湿器。本发明提供的方案实现干燥～100%RH范围内的气体湿度调整和控制,成本低,精度高,可行性高,便于实际操作和后期维护。(The invention discloses a small-flow split-flow humidification control module. The technical scheme of the invention is as follows: the utility model provides a small flow shunting humidification control module, includes gaseous trunk line, series connection has first flowmeter and automatic valve on the gaseous trunk line, automatic valve parallel connection has the bypass pipeline, series connection has second flowmeter and humidifier on the bypass pipeline, the humidifier is the tympanic bulla humidifier. The scheme provided by the invention realizes the adjustment and control of the gas humidity within the range of drying-100% RH, has low cost, high precision and high feasibility, and is convenient for actual operation and later maintenance.)

1. The utility model provides a small flow shunting humidification control module which characterized in that: including gaseous trunk line, series connection has first flowmeter and automatic valve in the gaseous trunk line, automatic valve parallel connection has the bypass pipeline, series connection has second flowmeter and humidifier on the bypass pipeline.

2. The small flow split humidification control module of claim 1, wherein: the humidifier is a bubbling humidifier.

3. The small flow split humidification control module of claim 1, wherein: and opening the opening degree of the second flowmeter step by step through PID regulation, forming gas with the humidity of 100% after part of the gas enters the humidifier, and forming gas in a state between dry and 100% humidity after the gas is mixed with dry gas passing through the automatic valve.

Technical Field

The invention relates to the technical field of fuel cell testing, in particular to a small-flow split-flow humidification control module.

Background

At present, most of fuel cell test equipment adopts a dry-wet switching mode to control the humidity of test gas, the gas only has two states of dryness and 100% relative humidity, and the wide-range research cannot be realized in the process of electric pile research.

Disclosure of Invention

Aiming at the defects in the prior art, the invention mainly aims to provide the small-flow split-flow humidification control module which can realize the adjustment and control of the gas humidity within the range of the drying RH-100%, has low cost, high precision and high feasibility and is convenient for actual operation and later maintenance.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a small flow shunting humidification control module, includes gaseous trunk line, series connection has first flowmeter and automatic valve on the gaseous trunk line, automatic valve parallel connection has the bypass pipeline, series connection has second flowmeter and humidifier on the bypass pipeline.

Preferably, the humidifier is a bubble humidifier.

Preferably, the opening degree of the second flowmeter is gradually opened through PID adjustment, part of the gas enters the humidifier to form gas with the humidity of 100%, and the gas is mixed with the dry gas passing through the automatic valve to form gas in a state between dry and 100% humidity.

Compared with the prior art, the invention has the following advantages, principles and working modes: the first flow meter controls the total gas flow into the control loop,

in the state 1, when 100% humidity gas is needed, the automatic valve is closed, the second flow meter is opened, and the gas reaches the dew point after passing through the bubbling humidifier to form 100% relative humidity gas.

And in the state 2, when dry gas is needed, the second flow meter is closed, the automatic valve is opened, and the dry gas directly flows to the downstream through the automatic valve after passing through the first flow meter.

And 3, when the gas humidity is required to be adjusted, humidity data collection is carried out at the downstream of the pipeline, on the premise of the 2 state, the opening degree of the second flow meter is gradually opened through PID adjustment, part of gas enters the bubbling humidifier to form gas with the humidity of 100%, the gas is mixed with the dry gas passing through the automatic valve to form gas in a state between the dry humidity and the humidity of 100%, the humidity of the mixed gas in the state is compared with the humidity index of the required gas, and the opening degree of the second flow meter is adjusted (decreased) according to the comparison result, so that the target state gas is quickly and accurately obtained.

Has the advantages that: the invention has the advantages of quickly and accurately adjusting the humidity of the downstream gas, using a small number of components as a whole and saving energy and cost.

Drawings

Fig. 1 is a schematic structural diagram of a small flow split humidification control module according to the present invention.

In the figure: 1. a gas main pipeline; 2. a first flow meter; 3. an automatic valve; 4. a bypass conduit; 5. a second flow meter; 6. a humidifier.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1, a small flow split humidification control module includes a main gas pipe 1, a first flowmeter 2 and an automatic valve 3 are connected in series on the main gas pipe 1, the automatic valve 3 is connected in parallel with a bypass pipe 4, and a second flowmeter 5 and a humidifier 6 are connected in series on the bypass pipe 4.

Preferably, the humidifier 6 is a bubbling humidifier 6.

Preferably, the opening degree of the second flow meter 5 is gradually opened through PID adjustment, and after part of the gas enters the humidifier 6, the gas with the humidity of 100% is formed, and after the gas is mixed with the dry gas passing through the automatic valve 3, the gas with the humidity of between dry and 100% is formed.

The method realizes the adjustment and control of the gas humidity within the range of drying-100% RH on the premise of saving cost, has low cost, high precision and high feasibility, and is convenient for actual operation and later maintenance. The invention realizes the adjustment of the relative humidity of the gas from a dry gas state to 100 percent RH through the integral coordination of the flow meter, the humidifier 6 and the valve

Principle and working mode: the first flow meter 2 controls the total gas flow into the control circuit,

in the state 1, when 100% humidity gas is required, the automatic valve 3 is closed, the second flowmeter 5 is fully opened, and the gas reaches the dew point after passing through the bubbling humidifier 6, thereby forming 100% relative humidity gas.

In the state 2, when dry gas is needed, the second flowmeter 5 is closed, the automatic valve 3 is opened, and the dry gas directly passes through the automatic valve 3 after passing through the first flowmeter 2 and flows to the downstream.

And a state 3, when the gas humidity is required to be adjusted, humidity data collection is carried out at the downstream of the pipeline, on the premise of the state 2, the opening degree of the second flow meter 5 is gradually opened through PID adjustment, part of gas enters the bubbling humidifier 6 to form gas with the humidity of 100%, the gas is mixed with the dry gas passing through the automatic valve 3 to form gas in a state between dry and 100% humidity, the humidity of the mixed gas in the state is compared with a required gas humidity index, and the opening degree of the second flow meter 5 is adjusted (decreased) according to a comparison result, so that the target state gas is quickly and accurately obtained.

Has the advantages that: the invention has the advantages of quickly and accurately adjusting the humidity of the downstream gas, using a small number of components as a whole and saving energy and cost.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.