Circulating air purification system in VOC (volatile organic compound) test cabin

Abstract

The utility model discloses a circulating air purification system in a VOC (volatile organic compound) test cabin, which is arranged on the VOC test cabin and comprises a fan, a filter, a first electric ball valve and a gas concentration sensor, the first electric ball valve is connected with the fan and the gas concentration sensor, and the first electric ball valve is used for controlling the opening and closing of the internal circulation path; and the gas concentration sensor is arranged in the VOC test cabin, and controls the on-off of the first electric ball valve and the fan based on the measured gas concentration value. According to the utility model, firstly, starting and stopping can be carried out according to different conditions of test samples, so that background impurities in the cabin can be effectively removed, and meanwhile, different sample test requirements of the VOC test cabin can be met; meanwhile, automatic starting and stopping can be achieved according to changes of the concentration in the cabin, energy consumption and noise are reduced, and the service life of a fan, a filter and other components is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a VOC test cabin, especially a VOC test cabin internal circulation air purification system. BACKGROUND

[0002] The TVOC background concentration of the existing VOC test cabin is generally controlled by clean air replacement; when the sample release amount is very large, the cabin or medical equipment sample with a breathing passage needs to be cleaned after the test, and the background in the test cabin needs to be purified during the test, and the control method needs a large amount of air replacement to achieve the purpose; but the large air volume of the air exchange will affect the temperature and humidity control of the cabin itself and affect the overall test process.

[0003] If the conventional cabin internal circulation purification device is used for processing as the clean room or the pretreatment room, the continuous internal circulation purification will affect the test of other samples at the same time, and also bring greater energy consumption and noise. UTILITY MODEL CONTENT

[0004] According to the utility model embodiment, a VOC test cabin internal circulation air purification system is provided, which is arranged on the VOC test cabin and comprises: a fan, a filter, a first electric ball valve and a gas concentration sensor; the first electric ball valve is connected with the fan and the gas concentration sensor, and is used for controlling the opening and closing of the internal circulation passage; the gas concentration sensor is arranged in the interior of the VOC test cabin, and the opening and closing of the first electric ball valve and the fan are controlled based on the measured gas concentration value.

[0005] Further, it further comprises: a differential pressure sensor arranged on the filter and used for measuring the air pressure difference between the two ends of the filter.

[0006] Further, the gas concentration sensor is a TVOC concentration sensor.

[0007] Further, it further comprises: a second electric ball valve arranged for controlling the input of the clean gas source to the interior of the VOC test cabin.

[0008] The VOC test cabin internal circulation air purification system according to the utility model embodiment can be started and stopped according to different conditions of the test sample, can effectively remove the background impurities in the cabin, is suitable for different sample test requirements of the VOC test cabin, can be automatically started and stopped according to the change of the concentration in the cabin, reduces the energy consumption and noise, and prolongs the service life of the fan, the filter and other components.

[0009] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the subject technology claimed. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 This is a schematic diagram of the VOC test chamber recirculating air purification system according to an embodiment of the present invention. Detailed Implementation

[0011] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0012] First, combine Figure 1 This invention describes a VOC testing chamber internal air purification system according to an embodiment of the present invention, used for internal air circulation within a VOC testing chamber.

[0013] like Figure 1 As shown in the figure, the VOC testing chamber internal circulation air purification system of this utility model embodiment is installed on the VOC testing chamber and includes: a fan 1, a filter 2, a first electric ball valve 3, and a gas concentration sensor 4; the first electric ball valve 3 is connected to the fan 1 and the gas concentration sensor 4, and is used to control the opening and closing of the internal circulation path of the internal circulation air purification system in this embodiment; the gas concentration sensor 4 is installed inside the chamber and controls the opening and closing of the first electric ball valve 3 and the fan 1 based on the gas concentration value it measures. In this embodiment, the gas concentration sensor 4 is a TVOC concentration sensor; the filter 2 can filter out dust and VOCs in the VOC testing chamber, which can both ensure the cleanliness of the background inside the chamber and the accuracy of the test.

[0014] Furthermore, such as Figure 1 As shown, the VOC test chamber circulating air purification system of this utility model embodiment also includes: a differential pressure sensor 5, which is installed on the filter 2 and is used to measure the air pressure difference across the filter 2.

[0015] Furthermore, it also includes: a second electric ball valve 6, which is configured to control the input of clean gas source into the VOC test chamber.

[0016] During operation, when performing routine tests, the first electric ball valve 3 is closed; when testing respiratory pathway samples such as ventilators, the concentration of VOCs in the chamber is measured by the TVOC concentration sensor. If the concentration is too high, the first electric ball valve 3 is opened, the fan 1 is started, and dust and VOCs are filtered through the filter 2. When the concentration is low, the first electric ball valve 3 is closed, and the fan 1 is turned off.

[0017] Above, refer to Figure 1The VOC test cabin inner circulating air purification system according to the embodiment of the utility model is described, first can start according to the different conditions of test sample, can effectively remove the background impurity in cabin, also applicable to the different sample test requirements of VOC test cabin, simultaneously, can start according to the change of cabin density, reduce energy consumption and noise, increase the life of fan, filter and other components.

[0018] It should be noted that in the present specification, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "contain" do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0019] Although the content of the utility model has been introduced in detail by the above preferred embodiment, it should be recognized that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and alternatives of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A VOC test chamber in-circulation air purification system, provided on the VOC test chamber, characterized in that, Comprise: fan, filter, first electric ball valve and gas concentration sensor; the first electric ball valve is connected with the fan and the gas concentration sensor, the first electric ball valve is used for controlling the opening and closing of internal circulation passage; the gas concentration sensor is arranged in the inside of the VOC test cabin, and the opening and closing of the first electric ball valve and the fan are controlled based on the gas concentration value measured by the gas concentration sensor.

2. The VOC test chamber internal air purification system of claim 1, wherein, Further comprise: differential pressure sensor, the differential pressure sensor is arranged on the filter, and is used for measuring the air pressure difference between the two ends of the filter.

3. The VOC test chamber internal air purification system of claim 1, wherein, The gas concentration sensor is a TVOC concentration sensor.

4. The VOC test chamber internal air purification system of claim 1, wherein, Further comprise: second electric ball valve, the second electric ball valve is arranged for controlling the input of clean gas source to the inside of the VOC test cabin.

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