Cylindrical flap with structured rough surfaces

An air flow control device, air technology, used in transportation and packaging, air handling equipment, heating/cooling equipment, etc., can solve problems such as insufficient noise reduction effect
CN100410090CInactive Publication Date: 2008-08-13VALEO KLIMASYST
7 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
VALEO KLIMASYST
Publication Date
2008-08-13
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an airflow control means, in particular for a motor vehicle heating, ventilation and / or air-conditioning system with an air flap (20) arranged in an air duct with first surface sections (11, 12, 13, 14, 21, 22, 23, 24) for mutual engagement and second surface sections (17, 26, 27), which do not engage with each other, whereby surface structure elements (28) are embodied on at least one second surface section (27).
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates primarily to an air flow control device, in particular for a heating, ventilation and / or air conditioning system of a vehicle. Such an air flow control device usually includes an air valve arranged in the air passage, and the air valve is used to increase or decrease the net cross section of the air passage. Background technique

[0002] In recent years, in the field of automobile heating equipment, ventilation equipment and / or air conditioning equipment, various efforts have been made to avoid noise generation, and it has been suggested that various noise reduction equipment should be provided, such as Helm Holtz resonator (Helmholz-Resonator) or other similar equipment. In addition, in order to avoid noise generation on the air valve, the edge area is specially designed to provide an irregular structure that avoids the whistling noise immediately before the opening moment, because the gap formed initially has an irregular shape...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More