Air duct structure of breathing machine

Abstract

The utility model relates to the technical field of breathing machines, and discloses a breathing machine air duct structure which comprises a shell and a fan arranged in an inner cavity of the shell, the shell comprises an air duct upper shell, an air duct middle shell and an air duct lower shell, and an air duct groove shell is fixedly arranged in an inner cavity of the air duct lower shell. The draught fan is fixedly arranged in the middle of an inner cavity of the air duct groove shell, an air duct is formed between the draught fan outer shell and the inner cavity wall of the air duct groove shell, an air inlet is formed in one side of the air duct lower shell, a differential pressure flow pipe is fixedly arranged on the air duct groove shell, and airflow enters the air duct through the air inlet and flows into the air duct through the differential pressure flow pipe. Air flow stably bypasses the outer side of the fan for a circle along the air duct and then enters the differential pressure flow pipe. According to the utility model, the winding and long air channel is arranged, so that the air flow can stably enter and exit, the vortex is reduced, the noise of the fan can be continuously absorbed and weakened when the noise is spread outwards along the air channel, and the comfort level and the experience effect of a user are improved.

Description

Technical Field

[0001] This utility model relates to the field of ventilator technology, specifically to a ventilator air duct structure. Background Technology

[0002] Home-use sleep apnea machines are mainly used in private homes, sleep centers, and small clinics, primarily for patients with sleep apnea syndrome. During the treatment, the patient is in a sleep state, requiring a quiet and comfortable environment. The machine uses a fan to pressurize the gas in the tubing to provide therapeutic relief. However, due to the short gas intake path at the fan inlet, noise is unavoidable during operation. Reducing fan noise is a major challenge that needs to be addressed.

[0003] Current ventilator fan noise reduction structures are complex in design, costly in mold design, and suffer from short gas paths within limited spaces, resulting in poor noise reduction. Therefore, there is an urgent need for a ventilator fan noise reduction chamber to address the issues of high cost and complex structure in existing chambers, while simultaneously extending the gas path within the limited space, reducing turbulence at the fan inlet, effectively improving noise reduction, and ensuring the user's sleep quality. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a ventilator air duct structure that solves the problems of complex fan noise reduction structure design, high mold design cost, short gas path and poor noise reduction effect in limited space in existing ventilators.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A ventilator duct structure includes a housing and a fan disposed within the housing cavity. The housing includes a lower duct shell, a middle duct shell, and a lower duct duct. A duct groove is fixedly disposed within the cavity of the lower duct shell. The fan is fixedly disposed in the middle of the cavity of the duct groove. A duct is formed between the fan shell and the inner wall of the duct groove. An air inlet is disposed on one side of the lower duct shell. A differential pressure flow pipe is fixedly disposed on the duct groove. Airflow enters the duct through the air inlet, smoothly circulates around the outside of the fan along the duct, and then enters the differential pressure flow pipe. The differential pressure flow pipe is connected to the air inlet of the fan. An air outlet is disposed on the upper duct shell, which is connected to the air outlet of the fan.

[0009] Preferably, a silicone air outlet is fitted onto the air outlet end of the fan, the silicone air outlet is connected to the air outlet, and the silicone air outlet is arranged in a compression-sealing manner between the upper shell of the air duct and the duct groove shell.

[0010] Preferably, a flow sensor interface is provided through the upper end face of the duct shell, and the flow sensor interface is connected to the air outlet of the differential pressure flow pipe through a through hole on the duct shell.

[0011] Preferably, the air duct shell is provided with a fan mounting groove that matches the shape of the fan.

[0012] Preferably, a plurality of sound-absorbing cotton blocks are arranged on the lower end face of the air duct shell, and a whole sound-absorbing cotton block is fixedly provided on the upper end face of the air duct shell.

[0013] (III) Beneficial Effects

[0014] This utility model has the following beneficial effects:

[0015] The ventilator's air duct structure forms a sealed air duct through the middle and lower shells. Airflow enters the duct through the inlet, smoothly circulates around the fan once, and then enters the differential pressure flow pipe. From there, the airflow rises through the differential pressure flow pipe and enters the fan mounting slot. The airflow passing above the fan effectively removes heat generated during continuous operation, extending the fan's lifespan. This winding and long air duct ensures smooth airflow, reduces turbulence, improves machine accuracy, and also absorbs and reduces fan noise as it propagates outwards along the duct, enhancing user comfort and experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the disassembled structure of the components of this utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention along the AA direction;

[0019] Figure 4 This is a schematic diagram of the installation layout structure of the air duct trough shell and the lower air duct shell of this utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the present invention in the BB direction;

[0021] Figure 6 This is a schematic diagram of the differential pressure flow tube layout structure of this utility model;

[0022] Figure 7 This is a schematic diagram of gas flow according to the present invention.

[0023] In the diagram: 1. Upper shell of the air duct; 2. Middle shell of the air duct; 3. Lower shell of the air duct; 4. Air outlet; 5. Air duct slot shell; 6. Air inlet; 7. Differential pressure flow pipe; 8. Silicone air outlet; 9. Fan; 10. Flow sensor interface; 11. Noise-absorbing cotton block; 12. Fan mounting slot; 13. Through hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 This utility model provides a technical solution: a ventilator air duct structure, including a shell and a fan 9 disposed in the inner cavity of the shell. The shell includes a lower air duct shell 3, a middle air duct shell 2, and a lower air duct shell 3. An air duct groove shell 5 is fixedly disposed in the inner cavity of the lower air duct shell 3. The fan 9 is fixedly disposed in the middle of the inner cavity of the air duct groove shell 5. An air duct is formed between the outer shell of the fan 9 and the inner wall of the air duct groove shell 5. An air inlet 6 is disposed on one side of the lower air duct shell. A differential pressure flow pipe is fixedly disposed on the air duct groove shell 5. The airflow enters the air duct through the air inlet 6, and after smoothly circling around the outside of the fan 9 along the air duct, it enters the differential pressure flow pipe. The differential pressure flow pipe is connected to the air inlet of the fan 9. An air outlet 4 is arranged on the upper air duct shell 1, which is connected to the air outlet of the fan 9.

[0026] In this invention, the middle shell 2 and the lower shell 3 of the air duct form a sealed air duct. Airflow enters the air duct through the air inlet 6, smoothly circulates around the fan 9 once, and then enters the differential pressure flow pipe. The airflow then rises through the differential pressure flow pipe and enters the fan mounting slot 12. The airflow passes over the fan 9, carrying away the heat generated during continuous operation and extending the service life of the fan 9. This winding and long air duct allows for smooth airflow, reduces eddies, improves machine accuracy, and also absorbs and reduces the noise of the fan 9 as it propagates outwards along the air duct, improving user comfort and experience.

[0027] In this embodiment, a silicone air outlet nozzle 8 is fitted onto the air outlet end of the fan 9. The silicone air outlet nozzle 8 is connected to the air outlet 4, and the silicone air outlet nozzle 8 is arranged in a compression-sealing manner between the upper shell 1 and the duct groove shell 5. (Refer to...) Figure 2 and 3As shown, the silicone air outlet 8 can effectively ensure the sealing performance between the air outlet of the fan 9 and the upper shell 1 of the air duct and the air duct groove shell 5, thereby ensuring that the airflow discharged from the fan 9 has a stable noise reduction effect when it is discharged from the air outlet 4.

[0028] Reference Figure 4 and 5 As shown, in this embodiment, a flow sensor interface 10 is arranged through the upper end face of the duct shell 1. The flow sensor interface 10 is connected to the outlet of the differential pressure flow tube 7 through a through hole 13 on the duct shell 5. Through the flow sensor interface 10 and the through hole 13, the flow rate of the airflow discharged from the outlet of the differential pressure flow tube 7 can be monitored and fed back in real time, so that the flow rate can be adjusted by controlling the speed of the fan 9. The differential pressure flow tube 7, in conjunction with the sensor, can accurately measure the flow rate of the airflow, achieving precise control of the ventilator.

[0029] Reference Figure 4 and 7 As shown, in this embodiment, the air duct shell 5 is provided with a fan mounting slot 12 that matches the shape of the fan 9. Through the fan mounting slot 12, the airflow rises from the differential pressure flow pipe 7 into the fan mounting slot 12. The airflow flows over the fan mounting slot 12, which can carry away the heat generated by the fan 9 during continuous operation and extend the service life of the fan 9.

[0030] Referring to Figures 2 and 6, in this embodiment, a plurality of sound-absorbing cotton blocks 11 are arranged on the lower end face of the duct shell 5, and a whole sound-absorbing cotton block 11 is fixedly installed on the upper end face of the duct shell 5. Through the sound-absorbing cotton blocks 11, the noise generated by the fan 9 is continuously absorbed and reduced as it propagates along the duct and the duct mounting groove toward the air outlet 4, thereby improving the user's comfort and experience.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilator air duct structure, comprising a housing and a fan disposed within the housing cavity, characterized in that: The housing includes an upper duct shell, a middle duct shell, and a lower duct shell. A duct groove is fixedly installed in the inner cavity of the lower duct shell. The fan is fixedly installed in the middle of the inner cavity of the duct groove. A duct is formed between the fan shell and the inner wall of the duct groove. An air inlet is provided on one side of the lower duct shell. A differential pressure flow pipe is fixedly installed on the duct groove. The airflow enters the duct through the air inlet, flows smoothly around the outside of the fan along the duct, and then enters the differential pressure flow pipe. The differential pressure flow pipe is connected to the air inlet of the fan. An air outlet is arranged on the upper duct shell, which is connected to the air outlet of the fan.

2. The ventilator air duct structure according to claim 1, characterized in that: A silicone air outlet is fitted onto the air outlet end of the fan. The silicone air outlet is connected to the air outlet and is arranged in a compression-sealing manner between the upper shell of the air duct and the duct groove shell.

3. A ventilator air duct structure according to claim 1 or 2, characterized in that: A flow sensor interface is arranged through the upper end face of the duct shell, and the flow sensor interface is connected to the air outlet of the differential pressure flow pipe through a through hole on the duct shell.

4. The ventilator air duct structure according to claim 3, characterized in that: The air duct shell is provided with fan mounting slots that match the shape of the fan.

5. A ventilator air duct structure according to claim 3, characterized in that: The lower end face of the air duct shell is provided with a number of sound-absorbing cotton blocks, and the upper end face of the air duct shell is fixedly provided with a whole piece of the sound-absorbing cotton block.

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