Ventilation system and heat exchange-type ventilation device
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Solution Overview
Problem
Conventional heat exchanging ventilation devices create negative pressure in kitchens when range hood fans operate, making it difficult to open and close doors and potentially causing self-opening/closing issues due to uneven air volume exchange.
Innovation Solution
A ventilation system that includes a range hood unit transmitting operation information to a heat exchanging ventilation device, which adjusts its air supply and exhaust volumes to maintain balanced air flow and prevent negative pressure through interlocked operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the range hood fan operates to exhaust air from the kitchen, then the air exchange efficiency is improved, but the building interior is put under negative pressure causing door operation difficulties
Solution Approach 1:
The heat exchanging ventilation device receives operation information from the range hood transmitting unit and uses this feedback to dynamically adjust its air supply and exhaust volumes. The control unit modifies ventilation parameters based on range hood operation status, ensuring that total exhaust volume equals total air supply volume to maintain atmospheric pressure and prevent door operation issues
Solution Approach 2:
The ventilation system transitions from static operation to dynamic adjustment. The heat exchanging ventilation device continuously adapts its air supply and exhaust volumes based on real-time range hood operation data, maintaining balanced air flow and preventing negative pressure conditions that would affect door operation
2Productivity
If the range hood fan operates at high exhaust volume, then the air exchange efficiency is improved, but wind noise increases due to unbalanced air flow
Solution Approach 1:
The system uses feedback from the range hood transmitting unit to dynamically balance air supply and exhaust volumes. By receiving real-time operation information and adjusting ventilation parameters accordingly, the system maintains balanced air flow even during high-exhaust operations, thereby preventing wind noise while preserving air exchange efficiency
Solution Approach 2:
The heat exchanging ventilation device changes operational parameters (air supply volume and exhaust volume) based on range hood operation status. By dynamically adjusting these parameters to maintain equality between total air supply and total exhaust, the system eliminates unbalanced air flow conditions that cause wind noise
3Device complexity
If the heat exchanging ventilation device operates independently without coordination, then the device complexity is reduced, but the air volume balance is disrupted causing negative pressure
Solution Approach 1:
The system merges the operation control of the range hood unit and heat exchanging ventilation device into a coordinated system. By combining their operations through information exchange and joint control, the system maintains air volume balance and prevents negative pressure while adding minimal complexity through standardized communication protocols
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents the interior of a building from being put under negative pressure by controlling air supply and exhaust volumes, ensuring easier door operation and reducing wind noise during range hood use.
Implementation Method 1
a heat exchange element configured to exchange heat between the supplied air and the exhaust air
Data Source
AI summary
The range hood unit includes a range hood transmitting unit configured to transmit information on an exhaust volume. The heat exchanging ventilation device (1) includes: a heat exchanger receiving unit (19) configured to receive the information from the range hood transmitting unit; and a heat exchanger control unit (17) configured to determine the operation of the heat exchanging ventilation device (1), based on the information received by the heat exchanger receiving unit (19). Based on the exhaust volume of the range hood unit that has been received by the heat exchanger receiving unit (19), the ventilation system exhausts air by subtracting the exhaust volume of the range hood unit from an exhaust volume equivalent to the air supply volume of the heat exchanging ventilation device (1).