Window openers can be classified into the following types according to different classification standards:
Classification by Transmission Method
- Chain-type Window Opener: Occupies little space, mainly used for top-hung, bottom-hung, and some center-hung windows that need to be opened for ventilation or smoke extraction. Its compact structure makes it particularly suitable for bottom-hung windows, but for wider and larger windows, an electric locking mechanism should be used to ensure the window's airtightness.
- Push-rod (Internal Screw) Type Window Opener: High pushing and pulling force, high protection level, and significant dust (moisture) and rainproof effects. Widely used outdoors, such as in electric sunshade louver systems. Mainly used for top-hung, center-hung, and bottom-hung windows that need to be opened for ventilation or smoke extraction.
- Rack and Pinion Type Window Opener: Moisture-resistant, corrosion-resistant, and with high load-bearing capacity, suitable for use in harsh climates, such as swimming pools and seaside buildings. It can achieve a long stroke and, through connecting rods, can achieve multi-point synchronous pushing or main-main double pushing/main-auxiliary double pushing to drive large windows.
- Pneumatic window openers: These require no electricity and can be powered by compressed air or CO2 gas, depending on the opening requirements. For fire exhaust, pneumatic window openers automatically release CO2 gas from a cylinder after a temperature-sensitive fuse detects a certain temperature, thus opening the window. For daily ventilation, compressed air can be used directly, with a solenoid valve controlling the gas flow to drive a cylinder to open or close the window.
Classification by applicable window type
- Skylights: Rack-and-pinion or push-rod type electric window openers are preferred. These are suitable for vertical forces, have no bending potential, are highly resistant to wind and rain, and generally have a large thrust.
- Sliding windows: Sliding arm or sliding type electric window openers are recommended. These are better suited for linear operation and provide a good seal when closed.
- Venetian blinds: Small rack-and-pinion or push-rod type electric window openers are recommended.
- Top/bottom/awning windows: Single-chain, double-chain, rack-and-pinion, and push-rod types can be used. For windows with aesthetic requirements, choose a chain-type opener (or a double-chain opener for larger windows). For windows with specific smoke extraction angle requirements, choose a double-push-rod type opener with a synchronizer or a double-rack type opener.
