Silent fan for noninvasive ventilator

Abstract

The utility model discloses a silent fan for a noninvasive ventilator, and aims to solve the problems that in the prior art, an air chamber and a motor assembly chamber are adjacent and can be independently detached, but the sealing effect of a connecting structure between the air chamber and the motor assembly chamber is poor, so that the air supply and silent effects of the fan are influenced; the technical problems that signal lines and power lines of a motor assembly chamber are scattered in wiring, connection lines are poor in protection, and later maintenance is inconvenient exist in the prior art are solved, and an air chamber internally provided with an impeller and the motor assembly chamber internally provided with a motor assembly are included; the motor assembly comprises a Hall PCB, a central shaft and a permanent magnet rotor. The Hall PCB comprises a Hall element plug-in and a weak induction magnet; the air chamber comprises an air chamber upper cover and an air chamber lower cover; the motor assembly chamber comprises a casing upper cover and a casing bottom cover; the casing upper cover comprises a connecting step and an elastic wire protecting sleeve; the air chamber lower cover abuts against the machine shell upper cover in a sealed mode through a double-ring sealing ring. The elastic wire protecting sleeve is provided with a convex wire penetrating hole; and the threading holes comprise a signal line routing hole and a power line routing hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan equipment technical field especially relates to a mute fan for noninvasive respirator. BACKGROUND

[0002] In the modern medical field, the respirator is a kind of medical equipment that can replace, control or assist normal breathing of human body, it plays a key role in the treatment of respiratory failure caused by various reasons, anesthesia respiratory management in large-scale operation, respiratory support treatment and emergency resuscitation, and its application in household market is also more and more popular. One of the key components of the respirator is the turbine fan, which is responsible for providing appropriate pressure and flow to deliver the gas required for breathing.

[0003] The existing turbine fan is generally mainly composed of volute, impeller and motor assembly, wherein the impeller and the motor assembly are respectively independently fixed in the air chamber and the motor assembly chamber without interfering with each other and can be independently detached for easy maintenance. The existing turbine fan has the following problems after long time use: the air chamber and the motor assembly chamber are adjacent and can be independently detached, but the sealing effect of the connecting structure between the two is poor, which affects the air supply and mute effect of the fan. The signal line and the power line of the motor assembly chamber are simply connected with the outside through a through hole on the shell of the motor assembly chamber, there are problems of scattered wiring, poor connection line protection and inconvenient later maintenance. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a mute fan for noninvasive respirator to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A mute fan for noninvasive respirator, the whole is in the shape of a solid of revolution, comprising a wind chamber for fixing an internal impeller and a motor assembly chamber for fixing an internal motor assembly. The wind chamber comprises a wind chamber upper cover and a wind chamber lower cover, which are threadedly connected in a separable manner. The motor assembly chamber comprises a machine shell upper cover abutting against the wind chamber bottom cover and a machine shell bottom cover. The two are threadedly connected in a separable manner. The output shaft of the motor assembly drives the impeller in the wind chamber through the machine shell upper cover.

[0007] The motor assembly comprises a Hall PCB board, a central shaft connected with the machine shell upper cover and the machine shell bottom cover through two bearings respectively and a permanent magnet rotor fixedly connected with the central shaft. The Hall PCB board comprises a Hall element plug-in and a weak induction magnet fixed on the central shaft and matched with the Hall element plug-in. The first balance block is fixedly connected to the central shaft close to the top of the permanent magnet rotor. The second balance block is fixedly connected to the central shaft close to the Hall PCB board. The weak induction magnet is embedded in the top of the second balance block.

[0008] The upper cover of the casing comprises a connecting step in sealing abutment with the bottom of the air chamber lower cover and an elastic wire protection sleeve detachably connected to the bottom; the bottom of the air chamber lower cover is in sealing abutment with the outer side wall of the connecting step of the upper cover of the casing through a double-ring sealing ring; the upper cover of the casing is provided with a through-type clamping hole matched with the elastic wire protection sleeve; the elastic wire protection sleeve is in abutment with the clamping hole; the bottom cover of the casing comprises a limiting protruding ring arranged on the top surface; the limiting protruding ring is in limiting connection with the inner wall of the bottom of the upper cover of the casing; the limiting protruding ring is provided with a connecting notch matched with the elastic wire protection sleeve.

[0009] The elastic wire protection sleeve is provided with a convex-shaped wire passing hole; the wire passing hole comprises a signal wire passing hole on one side and a power wire passing hole on the other side, and the two are integrally arranged through; the height of the signal wire passing hole is smaller than that of the power wire passing hole; during connection, the signal wire and the power wire pass through and are in elastic abutment in the signal wire passing hole and the power wire passing hole respectively.

[0010] Preferably, the inner wall of the top of the clamping hole is provided with a limiting protruding block, and the top of the elastic wire protection sleeve is provided with a limiting recess matched with the limiting protruding block; the limiting protruding block and the limiting recess are in separable limiting abutment, the connecting structure is simple, the connection is stable, and the disassembly and assembly are convenient.

[0011] Preferably, the outer side wall of the connecting step of the upper cover of the casing is provided with a plurality of arc-shaped open-bottom weight-reducing cavities arranged concentrically, which effectively reduces the weight while maintaining the structural strength.

[0012] Preferably, the outer side wall of the connecting step of the upper cover of the casing is provided with a sealing recess matched with the double-ring sealing ring, the sealing ring is accurately positioned, the sealing structure is stable, and the sealing effect is good.

[0013] Compared with the prior art, the non-invasive ventilator silent fan has the following beneficial effects:

[0014] The air chamber and the motor assembly chamber are adjacent and can be independently disassembled, so that the later maintenance of the impeller and the motor assembly is facilitated; the air chamber lower cover and the casing upper cover are in sealing abutment through the double-ring sealing ring, and the sealing effect is good; the casing upper cover is provided with a special elastic wire protection sleeve, which can protect the connecting wire, arrange the wire, facilitate disassembly, and facilitate later disassembly and maintenance; the weak induction magnet is wrapped by the second balance block, which can prevent the weak induction magnet from exploding during long-term use, improve the service life, and adjust the center of gravity of the motor assembly as a whole, so that the motor assembly is more balanced during operation, thereby reducing vibration and noise. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility model discloses an embodiment structure schematic view;

[0016] Figure 2The utility model discloses an explosion view of the structure of the embodiment;

[0017] Figure 3 The utility model discloses the structure schematic drawing of the upper cover of casing and casing bottom cover in the embodiment of the utility model;

[0018] Figure 4 The utility model discloses the structure explosion view of the upper cover of casing and casing bottom cover in the embodiment of the utility model;

[0019] Figure 5 The utility model discloses the structure explosion view of the upper cover of casing and casing bottom cover in the embodiment of the utility model from another perspective;

[0020] Figure 6 The utility model discloses the structure schematic drawing of the elastic wire protection sleeve in the embodiment of the utility model;

[0021] Figure 7 The utility model discloses the connecting structure sectional view of the upper cover of air chamber, the lower cover of air chamber, the upper cover of casing, motor assembly and casing bottom cover in the embodiment of the utility model;

[0022] Figure 8 The utility model discloses the structure schematic drawing of the motor assembly in the embodiment of the utility model.

[0023] The utility model discloses an explosion view of the structure of the embodiment; Specific embodiments

[0024] The following is further explained in detail through specific embodiments:

[0025] Embodiment 1

[0026] As Figures 1-8As shown in the figure, this embodiment demonstrates a silent fan for a non-invasive ventilator, which is in the shape of a rotating body and includes an air chamber with a fixed built-in impeller 1 and a motor assembly 2 chamber with a fixed built-in motor assembly 2. The air chamber includes an upper cover 3 and a lower cover 4, which are detachably threaded together. The motor assembly 2 chamber includes a housing upper cover 5 and a housing bottom cover 6 that abut against the lower cover of the air chamber, which are detachably threaded together. The output shaft of the motor assembly 2 passes through the housing upper cover 5 to drive the impeller 1 in the air chamber. In use, the output shaft of the motor assembly 2 drives the impeller 1 to rotate. Under the action of pressure difference, air enters from the air inlet 7 at the top of the air chamber upper cover 3 and is blown out from the air outlet 8.

[0027] like Figures 7-8 As shown, the motor assembly 2 includes a Hall effect PCB board 21, a central shaft 23 connected to the upper cover 5 and the lower cover 6 of the housing via upper and lower bearings 22 respectively, and a permanent magnet rotor 24 fixedly connected to the central shaft 23; the Hall effect PCB board 21 includes a Hall element insert 211 and a weak induction magnet 212 fixed to the central shaft and matching the Hall element insert 211; a first balance block 25 is fixedly connected to the central shaft 23 immediately above the permanent magnet rotor 24; a second balance block 26 is fixedly connected to the central shaft 23 near the Hall effect PCB board 21; the weak induction magnet 212... Embedded in the top of the second balance block 26; specifically, on the one hand, the first balance block 25 and the second balance block 26 can adjust the overall center of gravity of the motor assembly 2, making it more balanced during operation, thereby reducing vibration and noise. Especially under high speed and high load, the effect of the balance block is more obvious. This not only improves the stability of the motor assembly 2, but also improves its operating efficiency and service life. On the other hand, the second balance block 26 encloses the weak induction magnet 212 to prevent the weak induction magnet 212 from bursting during long-term use, thus improving its service life.

[0028] The upper cover 5 of the housing includes a connecting step 51 that seals against the bottom of the lower cover 4 of the air chamber and a detachable elastic cable sleeve 53 that is fixedly connected to the bottom. The bottom of the lower cover 4 of the air chamber is sealed against the outer wall of the connecting step 51 of the upper cover 5 of the housing through a double sealing ring 9. The double sealing ring 9 effectively improves the sealing performance at the connection. The upper cover 5 of the housing is provided with a through-hole 52 that matches the elastic cable sleeve 53. The elastic cable sleeve 53 is fixedly abutted against in the 52. The bottom cover 6 of the housing includes a limiting protrusion 61 on the top surface. The limiting protrusion 61 is fixedly connected to the inner wall of the bottom of the upper cover 5 of the housing, making the connection between the upper cover 5 of the housing and the bottom cover 6 of the housing more stable and reliable. The limiting protrusion 61 is provided with a connecting notch 62 that matches the elastic cable sleeve 53.

[0029] The elastic wire sleeve 53 is provided with a convex letter-shaped threading hole 531; the threading hole 531 includes a signal line wiring hole on one side and a power line wiring hole 533 on the other side, which are integrally arranged; the height of the signal wiring hole 532 is less than that of the power line wiring hole 533; when connected, the signal line and the power line pass through and elastically abut in the signal line wiring hole and the power line wiring hole 533 respectively, the elastic wire sleeve 53 can not only protect the connecting line, but also play a role in neatening the line, and is also convenient to disassemble, facilitating later disassembly and maintenance.

[0030] Embodiment 2

[0031] As shown in Figures 1-8 , another embodiment based on embodiment 1 shows a silent fan for a non-invasive respirator, which further illustrates that, in a further implementable manner of the embodiment, as shown in Figures 4-6 , the top inner wall of the clamping hole 52 is provided with a limiting protrusion 521, and the top of the elastic wire sleeve 53 is provided with a limiting groove 534 matched with the limiting protrusion 521; the limiting protrusion 521 and the limiting groove 534 are detachably limited and abutted, the connection structure is simple, the connection is stable, and the disassembly and assembly are convenient.

[0032] Embodiment 3

[0033] As shown in Figures 1-8 , another embodiment based on embodiment 1 shows a silent fan for a non-invasive respirator, which further illustrates that, in a further implementable manner of the embodiment, as shown in Figure 5 , the bottom side wall of the upper cover 5 of the shell is provided with a plurality of arc-shaped open-bottom weight-reducing cavities 54 arranged concentrically, which effectively reduce the weight while maintaining the structural strength.

[0034] Embodiment 4

[0035] As shown in Figures 1-8 , another embodiment based on embodiment 1 shows a silent fan for a non-invasive respirator, which further illustrates that, in a further implementable manner of the embodiment, as shown in Figure 3 and Figure 7 , the outer side wall of the connecting step 51 of the upper cover 5 of the shell is provided with a sealing groove 55 matched with the double-ring sealing ring 9, the sealing ring is accurately positioned, the sealing structure is stable, and the sealing effect is good.

[0036] The above only is the embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge in the scheme are not described too much here. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A silent fan for a non-invasive ventilator, characterized in that: The silent fan is in the shape of a rotating body, including a wind chamber with a fixed built-in impeller and a motor assembly chamber with a fixed built-in motor assembly; the wind chamber includes a wind chamber upper cover and a wind chamber lower cover, which are detachably threaded together; the motor assembly chamber includes a housing upper cover and a housing lower cover that abut against the bottom cover of the wind chamber, which are detachably threaded together; the output shaft of the motor assembly passes through the housing upper cover to drive the impeller in the wind chamber; The motor assembly includes a Hall effect PCB board, a central shaft connected to the upper cover and the lower cover of the housing via upper and lower bearings respectively, and a permanent magnet rotor fixedly connected to the central shaft; the Hall effect PCB board includes a Hall element insert and a weak induction magnet fixed to the central shaft and matching the Hall element insert; a first balance block is fixedly connected to the central shaft immediately above the permanent magnet rotor; a second balance block is fixedly connected to the central shaft near the Hall effect PCB board; the weak induction magnet is embedded in the top of the second balance block; The upper cover of the housing includes a connecting step that seals against the bottom of the lower cover of the air chamber and a detachable elastic cable guard sleeve that is limited and connected to the bottom. The bottom of the lower cover of the air chamber is sealed against the outer wall of the connecting step of the upper cover of the housing through a double-ring sealing ring. The upper cover of the housing is provided with a through-hole that matches the elastic cable guard sleeve. The elastic cable guard sleeve is limited and abuts against the snap-fit ​​hole. The bottom cover of the housing includes a limiting protrusion ring provided on the top surface. The limiting protrusion ring is limited and connected to the inner wall of the bottom of the upper cover of the housing. The limiting protrusion ring is provided with a connecting notch that matches the elastic cable guard sleeve. The elastic cable sleeve is provided with a convex-shaped cable hole; the cable hole includes a signal cable routing hole on one side and a power cable routing hole on the other side, which are integrally connected; the height of the signal cable routing hole is smaller than that of the power cable routing hole; when connected, the signal cable and the power cable pass through and elastically abut against the signal cable routing hole and the power cable routing hole, respectively.

2. The silent fan for a non-invasive ventilator according to claim 1, characterized in that: The upper inner wall of the snap-fit ​​hole is provided with a limiting protrusion, and the upper top of the corresponding elastic protective sleeve is provided with a limiting groove that matches the limiting protrusion; the limiting protrusion and the limiting groove can be separated and limited to abut against each other.

3. The silent fan for a non-invasive ventilator according to claim 1, characterized in that: The bottom side wall of the upper cover of the housing is provided with several concentric arc-shaped downward-opening weight-reduction cavities.

4. The silent fan for a non-invasive ventilator according to claim 1, characterized in that: The outer wall of the upper cover connecting step of the housing is provided with a sealing groove that matches the double-ring sealing ring.

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