Fresh air machine
By installing a mixing baffle in the mixing chamber of the fresh air unit, the problem of condensation at the return air guide vanes of the fresh air unit is solved, thereby reducing the risk of condensation while maintaining the simplicity and economy of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN CHANGHONG AIR CONDITIONER CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-14
AI Technical Summary
When operating in mixed air mode during winter, condensation is prone to occur at the return air guide vanes of the fresh air unit, affecting its use.
A mixing baffle is installed in the mixing chamber of the fresh air unit, located between the fresh air inlet and the return air inlet, to prevent outdoor fresh air and indoor return air from mixing at the return air inlet, and to guide airflow through the mixing baffle.
It effectively reduces the possibility of condensation at the return air guide vanes, has a simple structure, low cost, is easy to assemble, and is suitable for large-scale use.
Smart Images
Figure CN224498670U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of indoor air purification equipment, and in particular to a fresh air fan. Background Technology
[0002] A fresh air system is a ventilation device used for indoor and outdoor air exchange. Its main function is to introduce fresh outdoor air and expel stale indoor air. It can also have additional functions such as filtration, heat recovery, and humidity control to improve indoor air quality. To enhance comfort and reduce energy consumption, some fresh air systems include a mixed-air mode. This mode optimizes the temperature and humidity of the supplied air by mixing some indoor return air with outdoor fresh air. However, when operating in mixed-air mode in winter, the low-temperature outdoor air and indoor return air are mixed in the mixing chamber inside the fresh air system and then blown out of the air outlet. If the outdoor fresh air temperature is lower than the dew point temperature of the indoor return air, condensation can easily form at the return air inlet, especially at the return air guide vanes, affecting the operation of the fresh air system. Utility Model Content
[0003] The technical problem solved by this utility model is to provide a fresh air fan with a simple structure, which can effectively reduce the possibility of condensation at the return air guide vanes.
[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a fresh air unit, including a casing, a mixing chamber is provided in the middle of the casing, the mixing chamber includes a first side wall and a second side wall, a fresh air inlet and a return air inlet are provided on the first side wall, the fresh air inlet and the return air inlet are arranged side by side with intervals, an air outlet is provided on the first side wall of the mixing chamber, the fresh air inlet, the return air inlet and the air outlet are all connected to the mixing chamber, a fresh air guide vane is provided at the fresh air inlet, a return air guide vane is provided at the return air inlet, and a mixing air baffle is also included, the mixing air baffle is connected and provided on the inner side of the first side wall, the mixing air baffle is provided in the mixing chamber and located between the fresh air inlet and the return air inlet.
[0005] Furthermore, the first sidewall and the second sidewall are located on opposite sides of the mixing chamber.
[0006] Furthermore, the windbreak panel is rectangular in shape.
[0007] Furthermore, the length of the mixing baffle is 0.05-0.1 times the length of the mixing chamber.
[0008] Furthermore, the bottom surface of the air mixing baffle is flush with and abuts the bottom surface of the air mixing chamber, the top surface of the air mixing baffle is flush with and abuts the top surface of the air mixing chamber, and one side of the air mixing baffle is flush with and abuts the inner side of the first side wall of the air mixing chamber.
[0009] Furthermore, the wind-mixing baffle is detachably mounted on the inside of the first sidewall by screws.
[0010] The beneficial effects of this utility model are as follows: by setting a mixing air baffle, which is connected and set on the inner side of the first side wall, and is set in the mixing air cavity between the fresh air inlet and the return air inlet, the mixing air baffle blocks and guides the outdoor fresh air and indoor return air, avoiding the mixing of outdoor fresh air and indoor return air at the return air inlet, effectively reducing the possibility of condensation at the return air guide vane; and by setting only one mixing air baffle, the structure is simple, the cost is low, it is easy to assemble, and it is conducive to large-scale use. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model;
[0012] The components, parts and numbers in the figure are as follows: 1. Housing; 2. Mixing chamber; 3. First side wall; 4. Second side wall; 5. Fresh air inlet; 6. Return air inlet; 7. Air outlet; 8. Mixing baffle; 9. Screw. Detailed Implementation
[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0014] like Figure 1 As shown, the present invention's fresh air unit includes a housing 1, with a mixing chamber 2 disposed in the middle of the housing 1. The mixing chamber 2 includes a first side wall 3 and a second side wall 4. A fresh air inlet 5 and a return air inlet 6 are disposed on the first side wall 3, arranged side by side with intervals between them. An air outlet 7 is disposed on the first side wall 3 of the mixing chamber 2. The fresh air inlet 5, the return air inlet 6, and the air outlet 7 are all connected to the mixing chamber 2. A fresh air guide vane is disposed at the fresh air inlet 5, and a return air guide vane is disposed at the return air inlet 6. The unit also includes a mixing baffle 8, which is connected to the inner side of the first side wall 3 and is disposed in the mixing chamber 2 between the fresh air inlet 5 and the return air inlet 6.
[0015] The air mixing baffle 8 blocks the outdoor fresh air and indoor return air, preventing them from mixing and being guided at the return air inlet 6, effectively reducing the possibility of condensation at the return air guide vanes; moreover, by setting only one air mixing baffle 6, the structure is simple, the cost is low, it is easy to assemble, and it is conducive to large-scale use.
[0016] Specifically, in order to facilitate the mixing and delivery of outdoor fresh air and indoor return air, and for example... Figure 1 As shown, the first sidewall 3 and the second sidewall 4 are located on opposite sides of the mixing chamber 2. For example, if the first sidewall 3 is located on the left side of the mixing chamber 2, then the second sidewall 4 is located on the right side of the mixing chamber 2.
[0017] The mixing chamber 2 is typically rectangular in shape. To improve the performance of the mixing baffle 8, the mixing baffle 8 is also rectangular in shape, and its material is preferably plastic. To further improve the performance of the mixing baffle 8, the bottom surface of the mixing baffle 8 is flush with the bottom surface of the mixing chamber 2, the top surface of the mixing baffle 8 is flush with the top surface of the mixing chamber 2, and one side of the mixing baffle 8 is flush with the inner side of the first side wall 3 of the mixing chamber 2.
[0018] To reduce the impact of the mixing baffle 8 on the mixing effect of outdoor fresh air and indoor return air, the length of the mixing baffle 8 is 0.05-0.1 times the length of the mixing chamber 2.
[0019] The wind-mixing baffle 8 can be fixed by clips or screws. Preferably, the wind-mixing baffle 8 is detachably installed on the inner side of the first side wall 3 by screws 9.
Claims
1. A fresh air unit, comprising a housing (1), wherein a mixing chamber (2) is provided in the middle of the housing (1), the mixing chamber (2) comprising a first side wall (3) and a second side wall (4), wherein a fresh air inlet (5) and a return air inlet (6) are provided on the first side wall (3), the fresh air inlet (5) and the return air inlet (6) are arranged side by side at intervals, an air outlet (7) is provided on the first side wall (3) of the mixing chamber (2), the fresh air inlet (5), the return air inlet (6) and the air outlet (7) are all connected to the mixing chamber (2), a fresh air guide vane is provided at the fresh air inlet (5), and a return air guide vane is provided at the return air inlet (6), characterized in that: It also includes a mixing air baffle (8), which is connected to the inner side of the first side wall (3). The mixing air baffle (8) is located in the mixing air cavity (2) and between the fresh air inlet (5) and the return air inlet (6).
2. The fresh air system as described in claim 1, characterized in that: The first sidewall (3) and the second sidewall (4) are located on opposite sides of the mixing chamber (2).
3. The fresh air system as described in claim 1, characterized in that: The windbreak panel (8) is rectangular in shape.
4. The fresh air system as described in claim 3, characterized in that: The length of the mixing baffle (8) is 0.05-0.1 times the length of the mixing chamber (2).
5. The fresh air system as described in claim 4, characterized in that: The bottom surface of the mixing baffle (8) is flush with the bottom surface of the mixing chamber (2), the top surface of the mixing baffle (8) is flush with the top surface of the mixing chamber (2), and one side of the mixing baffle (8) is flush with the inner side of the first side wall (3) of the mixing chamber (2).
6. The fresh air system as described in any one of claims 1 to 5, characterized in that: The wind-mixing baffle (8) is detachably mounted on the inside of the first side wall (3) by screws (9).