An electronic cigarette anti-backflush airway
By using a silicone-separated shell and setting up air channels in the electronic cigarette, combined with the oil-absorbing cotton of the bracket to absorb the oil, the problem of condensate accumulation during backflushing is solved, thus improving the safety and stability of the electronic cigarette.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN ECT TECH LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-05-26
AI Technical Summary
Existing electronic cigarettes cause condensation in their internal electronic components when backflushing, affecting safety and reliability.
The shell is separated into upper and lower parts using silicone, and an air passage is set in the silicone. A passage is formed between the mouthpiece, heating wire assembly, silicone and bracket airflow channel. The battery and circuit board are isolated, and oil-absorbing cotton is placed between the battery and circuit board and between the battery and bracket airflow channel to absorb oil.
It effectively prevents condensation from accumulating inside the electronic cigarette, improving the safety and reliability of the device, ensuring the safety of the circuit board, and increasing the stability of the device.
Smart Images

Figure CN224268343U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic cigarette technology, and in particular to an anti-backflow airway for electronic cigarettes. Background Technology
[0002] Electronic cigarettes, also known as virtual cigarettes or e-cigarettes, are primarily used for smoking cessation and as a substitute for traditional cigarettes. While they share some similarities with regular cigarettes—providing alertness and satisfying smokers' cravings and long-standing habits—they are fundamentally different. Electronic cigarettes do not burn, contain no tar, and lack the more than 460 chemical substances produced during the combustion of regular cigarettes that can cause respiratory and cardiovascular diseases. This eliminates the carcinogens found in regular cigarettes and avoids the harm of secondhand smoke and environmental pollution.
[0003] Currently, the layout of e-cigarettes on the market is unreasonable. When the cigarette is blown back, it will affect the electronic components inside the e-cigarette, causing condensation on the electronic components and affecting the use of the e-cigarette. Utility Model Content
[0004] This invention proposes an anti-backflow airway for electronic cigarettes.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An anti-backflush airflow duct for an electronic cigarette includes a housing, a mouthpiece at the top of the housing, an oil reservoir in the upper middle part of the housing containing a heating wire assembly, silicone pads below the oil reservoir, a battery and a circuit board in the lower middle part of the housing, and a support airflow channel on one side of the battery. A passage is formed between the mouthpiece, the heating wire assembly, the silicone pads, and the support airflow channel.
[0007] A further preferred embodiment of this utility model is that oil-absorbing cotton is provided between the battery and circuit board and the casing, and between the battery and circuit board and the airflow channel of the bracket.
[0008] A further preferred embodiment of this utility model is that the silicone is located in the middle of the shell, and the silicone separates the upper and lower parts of the shell.
[0009] A further preferred embodiment of this utility model is: an opening on one side of the bottom of the housing, and the bottom opening of the housing is connected to the airflow channel of the bracket.
[0010] A further preferred embodiment of this utility model is that the heating wire assembly has an airflow channel inside.
[0011] The present invention has the following advantages:
[0012] This invention uses silicone to separate the upper and lower parts of the shell, and at the same time, opens an air channel in the silicone. A passage is formed between the mouthpiece, heating wire assembly, silicone and support airflow channel. The passage is isolated from the battery and circuit board, which solves the problem of condensation liquid in the electronic components inside the product when the electronic cigarette is back-blown, and increases the safety and reliability of the device. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0014] Figure 2 This is a side view of the structure of this utility model;
[0015] In the diagram: 1. Mouthpiece, 2. Heating wire assembly, 3. Heating wire assembly airflow channel, 4. Silicone, 5. Bracket airflow channel, 6. Battery, 7. Bracket oil absorbent cotton, 8. Housing, 9. Oil tank, 10. Circuit board. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0017] according to Figure 1-2 As shown, an anti-backflush airflow duct for an electronic cigarette includes a housing 8, a mouthpiece 1 at the top of the housing 8, an oil tank 9 in the upper middle part of the interior of the housing 8, a heating wire assembly 2 inside the oil tank 9, a silicone 4 below the oil tank 9, a battery 6 and a circuit board 10 in the lower middle part of the interior of the housing 8, and a support airflow channel 5 on one side of the battery 6. A passage is formed between the mouthpiece 1, the heating wire assembly 2, the silicone 4 and the support airflow channel 5, and the passage is isolated from the battery and the circuit board. This arrangement can ensure that the electronic components inside the product will not generate condensate when the electronic cigarette is backflushed.
[0018] Oil-absorbing cotton 7 is provided between the battery 6 and the circuit board 10 and the housing 8, and between the battery 6 and the circuit board 10 and the airflow channel 5 of the bracket. This arrangement can absorb the oil generated inside the housing and ensure the safety of the circuit board 10.
[0019] Silicone 4 is located in the middle of the housing 8, and silicone 4 separates the upper and lower parts of the housing 8. There are air channels inside silicone 4. This arrangement can separate the inside of the housing and ensure the safety of the circuit board 10.
[0020] The bottom of the housing 8 has an opening on one side, which is connected to the airflow channel 5 of the bracket. This arrangement increases the stability of the device and ensures normal air intake and exhaust between the mouthpiece 1, the heating wire assembly 2, the silicone 4 and the airflow channel 5 of the bracket.
[0021] The heating wire assembly 2 has an airflow channel 3 inside.
[0022] Working principle: When the electronic cigarette is back-blown, the gas passes through the mouthpiece 1, heating wire assembly 2, silicone 4 and support airflow channel 5 in sequence, and finally flows out of the shell through the opening at the bottom of the shell.
[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An electronic cigarette anti-back-draft airway, characterized in that: The device includes a housing (8), a mouthpiece (1) is provided on the top of the housing (8), an oil tank (9) is provided in the upper middle part of the housing (8), a heating wire assembly (2) is provided in the oil tank (9), silicone (4) is provided below the oil tank (9), a battery (6) and a circuit board (10) are provided in the lower middle part of the housing (8), and a support airflow channel (5) is provided on one side of the battery (6). A passage is formed between the mouthpiece (1), the heating wire assembly (2), the silicone (4) and the support airflow channel (5).
2. The anti-backflush airflow duct for electronic cigarettes according to claim 1, characterized in that: Oil-absorbing cotton (7) is provided between the battery (6) and circuit board (10) and the casing (8), and between the battery (6) and circuit board (10) and the airflow channel (5) of the bracket.
3. The anti-backflush airflow duct for electronic cigarettes according to claim 1, characterized in that: The silicone (4) is located in the middle of the shell (8), and the silicone (4) separates the shell (8) from top to bottom.
4. The anti-backflush airflow duct for electronic cigarettes according to claim 1, characterized in that: The bottom side of the housing (8) is open, and the bottom opening of the housing (8) is connected to the airflow channel (5) of the support.
5. The anti-backflush airflow duct for electronic cigarettes according to claim 1, characterized in that: The heating wire assembly (2) has an airflow channel (3) inside.