Air interchanger under indoor door
By installing a underdoor ventilation device under the door leaf, using the gap below the door leaf, and using the fan to drive the airflow to discharge the indoor air, the construction difficulties in the existing technology are solved, and indoor air circulation improvement without dismantling and modification is achieved.
Patent Information
- Application Number
- CN202510740090.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2025-08-19
AI Technical Summary
The prior art requires holes in the wall or holes in the door when installing ventilation equipment, resulting in high construction costs and high difficulty, which is not suitable for large-scale promotion.
A underdoor ventilation device is designed, including a housing, a fan, a controller, an air inlet and an air outlet. Using the 1CM gap below the door leaf, the fan drives the airflow from the door to the outdoors through the fan, increasing the indoor and outdoor air circulation.
It realizes improving indoor air circulation and improving air quality without removing or modifying walls and doors.
Smart Images

Figure CN120506704A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an indoor ventilation system, in particular to an under-door ventilation device. Background Art
[0002] The ventilation system is a ventilation device installed indoors to increase indoor air circulation and improve indoor air quality. Currently, many human living rooms are poorly ventilated, have slow air circulation, and have poor indoor air quality.
[0003] The existing technology is to install ventilation equipment by drilling holes in the wall or on the door. This operation cost is high and the construction is troublesome. It is difficult for residents to install the equipment and is not suitable for large-scale promotion.
[0004] When installing interior doors in the market now, a 1CM gap is reserved on the lower side of the door leaf.
[0005] Therefore, it is necessary to provide a novel under-door ventilation solution to solve the above problems. Summary of the Invention
[0006] The main purpose of the present invention is to provide an under-door ventilation device that can improve indoor air circulation without the need for drilling or modification.
[0007] The present invention achieves the above-mentioned purpose through the following technical solution: a ventilation device under the door, including a shell, a fan, a controller, an air inlet, and an air outlet. The shell is made of plastic, the fan is installed in the shell, the air inlet is fitted with the shell, and the air outlet is installed on the lower side of the shell. The shell is connected to the air inlet and the air outlet to form an air duct to guide air circulation.
[0008] Specifically, the shell is fixed below the door leaf.
[0009] Specifically, the air inlet is aimed at the room.
[0010] Specifically, there is a 1 cm gap between the lower side of the indoor door leaf and the ground, and the air outlet is aligned with the gap below the door leaf and points to the outdoors.
[0011] Specifically, the air outlet adopts a flat design to increase the exhaust diameter.
[0012] The present invention is beneficial in that it utilizes the gap under the door leaf without the need for dismantling or modifying the door leaf, and drives the air flow from under the door to the outside through the fan, thereby increasing indoor and outdoor air circulation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The drawings that constitute part of the specification of this application are used to provide further understanding of the application. The illustrative embodiments of the application and their descriptions are used to explain the application and do not constitute improper limitations on the application.
[0014] Figure 1 It is a three-dimensional schematic diagram of the ventilation device under the door.
[0015] Figure 2 This is a schematic diagram of the installation position of the under-door ventilation device.
[0016] Figure 3 This is a schematic diagram of the explosion of the ventilation device under this door.
[0017] The marks in the figure indicate: a-housing, b-fan, c-air inlet, d-air outlet, e-controller. DETAILED DESCRIPTION
[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0019] like Figure 2 As shown, the under-door ventilation device of the present invention is installed and fixed under the door leaf, and the lower side of the air outlet d should be lower than the bottom of the door leaf and not touch the ground.
[0020] The fan b is turned on by the controller e, and the air is pressurized into the shell a through the air inlet c and the flow direction of the gas is changed so that it is blown out along the side opening below the air outlet d toward the gap under the door, completing the active circulation of indoor air.
[0021] The above description is only an embodiment of the present invention. Those skilled in the art may make several modifications and improvements without departing from the inventive concept of the present invention, and all of these modifications and improvements fall within the scope of protection of the present invention.
Claims
1. An indoor under-door ventilation device, comprising a housing, a fan, a controller, an air inlet, and an air outlet, characterized in that: The shell is installed under the indoor door and is close to the door. The air outlet is aligned with the gap under the door leaf. The fan rotates under the control of the controller. The air inlet, shell and air outlet are connected to form an air duct for guiding air flow. The air in the air duct flows from indoors to outdoors, increasing indoor air circulation.
2. The indoor under-door ventilation device according to claim 1, characterized in that: The air outlet is directly opposite to the gap below the door leaf, and the air passes through the bottom of the door leaf.
3. The indoor under-door ventilation device according to claim 1, characterized in that: The air outlet is elongated and flat, thereby increasing the air outlet area.
4. The indoor under-door ventilation device according to claim 1, characterized in that: The shell and the air inlet and the air outlet are fixedly connected to form a shell with a cavity.