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Fresh air system filter blockage judgment method and fresh air host and fresh air system

A technology of fresh air system and filter device, which is applied in the direction of separation method, filter separation, chemical instrument and method, etc., can solve the problems of increasing judgment cost and detection influence, and achieves the goal of improving reliability, avoiding the influence of detection devices, and low cost Effect

Active Publication Date: 2019-02-22
HANGZHOU FILTECH INTELLIGENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] For method three, a differential pressure sensor needs to be installed. On the one hand, it increases the judgment cost. On the other hand, the external dust accumulates on the differential pressure sensor. After a period of use, its detection will be greatly affected.

Method used

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  • Fresh air system filter blockage judgment method and fresh air host and fresh air system
  • Fresh air system filter blockage judgment method and fresh air host and fresh air system
  • Fresh air system filter blockage judgment method and fresh air host and fresh air system

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Embodiment Construction

[0038] The method for judging the clogging of the filter device will be described below in combination with specific examples.

[0039] refer to figure 1 1. A main frame with the function of judging the blockage state of the filter device should also include: a main control module 10, a fan control module 20, and a power detection module 30, in addition to the housing, the fan 40 filter device 50, and the air inlet and outlet.

[0040] Wherein, the main control module 10 is connected with the fan control module 20 and the power detection module 30, and calculates the corresponding voltage value and current by sampling the voltage and current signals in the voltage detection module 31 and the current detection module 32 in the power detection module 30 value to calculate the fan power.

[0041] The blower control module 20 is connected with the circuit part of the blower, and is used for starting and stopping the blower 40 and controlling the speed of the blower 40 .

[0042]...

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Abstract

The invention belongs to the technical field of air purifying, and discloses a blocking judgment method for a filtering device of a fresh air system, a fresh air main machine and the fresh air system. The blocking judgment method includes the steps that the working current and the working voltage of a draught fan of the fresh air system are detected in real time, and the real-time power of the draught fan is calculated; the real-time power is compared with preset reference power, and the corresponding blocking state of the filtering device is obtained. By means of the scheme, no special detection device such as a pressure sensor and a wind speed detection device needs to be specially arranged on the filtering device of the fresh air system, rules are found from changes in the running voltage and the running current of the draught fan, the use conditions of the filtering device are indirectly judged, cost is low, influences, of external factors such as dust, on the detection device are further avoided, and reliability is further improved.

Description

technical field [0001] The invention belongs to the technical field of air purification, in particular to a fresh air system, in particular to a method for judging blockage of a filter device of the fresh air system. Background technique [0002] For judging the blockage of the filter device of the fresh air system, the following methods are currently used: [0003] 1. Timing judgment method, through experiments to judge and detect the time required for the filter device to be used from a new state to a clogged state, and set this time as the clogging time threshold. In actual use, the use time of the filter device is recorded cumulatively. When the use time is greater than the clogging time threshold, it means that the filter device is clogged; [0004] 2. Reflection method, install infrared light or sound wave transmitter and receiver near the filter device in the fresh air host, the transmitter emits infrared light or sound waves to the surface of the filter device, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/89B01D35/143
CPCF24F11/30F24F11/39
Inventor 沈亚斌
Owner HANGZHOU FILTECH INTELLIGENT CO LTD