CN115839352A

CN115839352A - Fan subassembly and breathing machine that has it

Info

Publication number: CN115839352A
Application number: CN202211602299.9A
Authority: CN
Inventors: 罗华帅; 陆振雷; 梅余辉
Original assignee: Feiyinuo Technology Co ltd
Current assignee: Feiyinuo Technology Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-03-24

Abstract

A fan assembly and a ventilator therewith, the fan assembly comprising: the fan assembly comprises a fan, a shell and a throttling element, wherein the fan is provided with an air inlet, the shell is provided with an air inlet, an air inlet air passage for communicating the air inlet with the air inlet, and a first pressure sampling port and a second pressure sampling port which are communicated with the air inlet air passage; utilize the installed part to separate two air flues with the air flue that admits air to set up two pressure ports respectively on two air flues, improved the cover route of pressure section in the air flue that admits air, thereby improved flow monitoring's accurate nature.

Description

Fan subassembly and breathing machine that has it

Technical Field

The invention relates to the field of medical instruments, in particular to a fan assembly and a breathing machine with the same.

Background

The ventilator has been widely used in respiratory failure due to various reasons, anesthesia and breathing management during major surgery, respiratory support therapy and emergency resuscitation, and has a very important position in the modern medical field as an effective means for manually replacing the autonomous ventilation function. A common respirator includes a blower assembly and a water tank assembly, the blower assembly being configured to drive an airflow toward the water tank assembly and to mix with water vapor generated by the water tank assembly and deliver the mixture to a mask worn by a patient.

The gas flow in the existing fan assembly is determined by detecting the pressures at the front and the rear of the damping net and combining the Bernoulli equation, and the positions of the two pressure detection points are usually arranged close to the damping net, so that the covering path of the pressure collection section in the air inlet passage is short, and the flow monitoring accuracy is influenced.

Disclosure of Invention

The invention aims to provide a fan assembly capable of improving flow monitoring accuracy.

To achieve one of the above objects, an embodiment of the present invention provides a fan assembly, including:

a fan having an air inlet;

the air inlet and the air inlet are communicated with a first pressure sampling port and a second pressure sampling port;

the throttling element is arranged in the air inlet air passage and conducts the first pressure sampling port and the second pressure sampling port;

the fan subassembly is still including the installed part of connecting fan and casing, the installed part will admit air the air flue and separate for first air flue and the second air flue that communicates each other, first adopt the pressure mouth to communicate in first air flue, the second adopts the pressure mouth to communicate in the second air flue.

As a further improvement of an embodiment of the present invention, the first pressure producing port and the second pressure producing port are located on the same side of the casing.

As a further improvement of an embodiment of the present invention, the flow direction of the air passage of the first air passage is consistent with the flow direction of the air passage of the second air passage, and both are consistent with the rotation direction of the fan impeller.

As a further improvement of an embodiment of the present invention, the housing includes a first shell forming the air inlet, and the first air passage is formed between the first shell and the mounting member and is circumferentially arranged around an axis of the fan wheel.

As a further improvement of an embodiment of the present invention, the mounting member has an air guiding opening for communicating the first air passage and the second air passage, the first casing has a mounting cavity matched with the blower and a first cavity communicated with the mounting cavity and matched with the mounting member, the blower assembly further includes a partition member disposed in the first cavity, the air guiding opening and the air inlet opening are located at two sides of the partition member, and both the air guiding opening and the air inlet opening are exposed towards the first cavity.

As a further improvement of the embodiment of the present invention, the first pressure sampling port is disposed on the first shell and exposed towards the first cavity, and the first pressure sampling port and the air inlet are located on different sides of the first shell.

As a further improvement of the first embodiment of the present invention, the casing further includes a second casing connected to the first casing, the second casing has a second cavity communicated with the air guiding opening, the fan assembly further includes a second flow guiding plate disposed in the second cavity, the second flow guiding plate is bent and extended from the air guiding opening toward the air inlet, and the second air channel is formed in the second cavity and located between the second casing and the second flow guiding plate.

As a further improvement of an embodiment of the present invention, the second production pressure port is provided on the second casing and exposed toward the second chamber, and the orifice is provided in the second chamber and located on a different side of the second casing from the second production pressure port.

As a further improvement of an embodiment of the present invention, the throttle member is configured in a porous honeycomb shape and is inserted into the second chamber.

In order to achieve the purpose of the invention, the invention also provides a respirator, which comprises the fan assembly.

Compared with the prior art, in the embodiment of the invention, the air inlet air passage is separated into the two air passages by the mounting piece, and the two pressure sampling ports are respectively arranged on the two air passages, so that the covering path of the pressure sampling section in the air inlet air passage is improved, and the accuracy of flow monitoring is improved.

Drawings

FIG. 1 is a schematic perspective view of a fan assembly in accordance with a preferred embodiment of the present invention;

FIG. 2 is an exploded schematic view of the blower assembly of FIG. 1;

FIG. 3 is a schematic perspective view of the first shell of FIG. 1;

FIG. 4 is a perspective view of the second housing of FIG. 1 shown connected to a throttle member;

fig. 5 is a perspective view of the orifice member of fig. 1.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes in accordance with the embodiments are within the scope of the present invention.

It will be understood that terms used herein such as "upper," "lower," "outer," "inner," and the like, refer to relative spatial positions of one element or feature with respect to another element or feature as illustrated in the figures for purposes of explanation. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

Moreover, it will be understood that, although the terms first, second, etc. may be used herein to describe various elements or structures, these described elements should not be limited by the above terms. The above terms are only used to distinguish these descriptive objects from each other. For example, the first air passage may be referred to as the second air passage, and likewise, the second air passage may also be referred to as the first air passage, without departing from the scope of the application.

Referring to figures 1 to 5, a preferred embodiment of the present invention provides a blower assembly for a domestic ventilator, typically for use in conjunction with a water tank assembly, for driving airflow to the water tank assembly and for mixing with water vapour generated by the water tank assembly for delivery to a mask worn by a user.

Specifically, referring to fig. 1 and 2 in combination, a fan assembly includes a fan 10, a housing 20, and a throttle 30. In this embodiment, the blower 10 is connected to the housing 20 and is mounted to the ventilator by the housing 20.

Specifically, the fan 10 has an air inlet 11. In this embodiment, the fan 10 is configured as a centrifugal fan, and the fan 10 further has an air outlet 12.

Specifically, the housing 20 has an air inlet 21, an air intake passage communicating the air inlet 21 and the air inlet 11, and a first pressure generating port 23 and a second pressure generating port 24 communicated with the air intake passage. In the present embodiment, the first and

second pressure ports

23 and 24 are used for mounting pressure sensors.

Specifically, the throttle member 30 is disposed in the intake air passage and communicates the first pressure generating port 23 and the second pressure generating port 24. In this embodiment, the throttle 30 can block the gas flow in the intake air passage, thereby reducing the propagation cross-sectional area of the acoustic energy. The first pressure sampling port 23 and the second pressure sampling port 24 are respectively located at the upstream and downstream of the throttling element 30, and due to the fact that the flow area of the throttling element 30 is fixed, the flow value in the air inlet passage can be calculated and obtained by obtaining the pressure difference between the first pressure sampling port 23 and the second pressure sampling port 24 and then according to the Bernoulli principle, and a user can adjust the rotating speed of the fan 10 to adjust the flow value according to needs.

Further, the fan assembly further includes a mounting member 40 connecting the fan 10 and the housing 20. In this embodiment, the blower 10 is fixed in the housing 20 by the mounting member 40. The mounting member 40 is made of an elastic material, and preferably made of a silicone material, so that the fan 10 is suspended in the housing 20 to block vibration generated during operation of the fan 10, thereby reducing noise generated during operation of the fan 10.

As shown in fig. 3 and 4, the mounting member 40 divides the intake air passage into a first air passage 221 and a second air passage 222 which communicate with each other. In this embodiment, after the mounting member 40 is installed in the housing 20, the first air passage 221 and the second air passage 222 are formed by dividing the inner space of the housing 20. The air inlet 21 is exposed to the first air passage 221, the air inlet 11 is exposed to the second air passage 222, and the first air passage 221 and the second air passage 222 are communicated with each other, so that the flowing time of the air in the whole air inlet passage is increased, namely, the time for the air to flow into the air inlet 11 from the air inlet 21 is increased.

Further, the first pressure generating port 23 is communicated with the first air passage 221, and the second pressure generating port 24 is communicated with the second air passage 222. In this embodiment, the air intake duct includes a first non-pressure-producing section communicating the air inlet 21 and the first pressure-producing port 23, a pressure-producing section communicating the first pressure-producing port 23 and the second pressure-producing port 24, and a second non-pressure-producing section communicating the second pressure-producing port 24 and the air inlet 11. Because the pressure sampling section covers the first air passage 221 and the second air passage 222, the coverage path of the pressure sampling section in the whole air inlet passage is improved as much as possible, and the accuracy of flow monitoring is improved.

And with the increase of the covering path of the pressure collecting section, the covering path of the non-pressure collecting section in the air inlet passage is compressed, so that the invalid pressure loss of the non-pressure collecting section in the air inlet passage is reduced, and the pressure drop utilization efficiency is improved. Therefore, the requirements on the performance parameters of the fan 10 can be reduced, which in turn reduces the fan cost and reduces noise and energy consumption during operation of the ventilator.

In conclusion, utilize installed part 40 to separate two air flues with the air inlet flue to set up two pressure ports respectively on two air flues, improved the cover route of pressure section in the air inlet flue, thereby improved flow monitoring's accuracy nature.

Further, the first pressure producing port 23 and the second pressure producing port 24 are located on the same side of the casing. In this embodiment, as shown in fig. 1, the first pressure sampling port 23 and the second pressure sampling port 24 are located on the same side of the casing 20 and are arranged along the axial direction of the impeller of the fan 10, so that the first pressure sampling port 23 and the second pressure sampling port 24 are arranged in close proximity to each other, thereby reducing the distance between the first pressure sampling port 23 and the second pressure sampling port 24, and facilitating a user to install pressure sensors at the first pressure sampling port 23 and the second pressure sampling port 24 and perform flow monitoring.

Further, the air passage flow direction of the first air passage 221 is consistent with the air passage flow direction of the second air passage 222. In this embodiment, the flow direction of the air passage of the first air passage 221 refers to the schematic airflow diagram in fig. 3, and the flow direction of the air passage of the second air passage 222 refers to the schematic airflow diagram in fig. 4. The air flue flow direction of first air flue 221 and the air flue flow direction of second air flue 222 keep unanimous, specifically mean that the air flue flow direction of both all keeps clockwise or anticlockwise the same and turns to for the intercommunication of air current is more smooth and easy between first air flue 221 and the second air flue 222, also makes the inside air current of air inlet flue remain stable, thereby guarantees to be located two accuracy that adopt the pressure mouth to obtain atmospheric pressure in two air flues, then improves flow monitoring's accuracy.

Further, the air passage flow direction of the first air passage 221 and the air passage flow direction of the second air passage 222 are both consistent with the rotation direction of the impeller of the fan 10. In this embodiment, as shown in fig. 2, after the rotation direction of the impeller of the fan 10 keeps turning counterclockwise, the flow direction of the air passage of the first air passage 221 and the flow direction of the air passage of the second air passage 222 also keep turning counterclockwise, so that the fan 10 more smoothly extracts air from the air inlet passage, noise generated when the fan 10 sucks air is reduced, and noise generated by air in the air inlet passage is reduced.

Specifically, the housing 20 includes a first shell 25 forming the air inlet 21, and the first air duct 221 is formed between the first shell 25 and the mounting member 40 and is disposed circumferentially around an axis of the impeller of the fan 10. In this embodiment, the axis of the impeller of the fan 10 can be referred to in fig. 2 as a dotted line at the fan 10. As shown in fig. 3, the air inlet 21 is located on the side of the first casing 25, and after the air outside the casing 20 flows into the first air duct 221 from the air inlet 21, the air rotates along the side of the first casing 25 in the first air duct 221 and then enters the second air duct 222, so that the path length of the first air duct 221 is increased, and the flowing time of the air in the first air duct 221 is increased. Therefore, the air passage path between the first pressure producing port 23 and the second pressure producing port 24 is increased, so that the covering path of the pressure producing section is improved, and the accuracy of flow monitoring is improved.

Specifically, the mounting member 40 has an air guiding opening 41 for communicating the first air passage 221 and the second air passage 222. In the present embodiment, as shown in fig. 2, the mounting member 40 includes a connecting portion 42 forming the air guiding opening 41 and a mounting portion 43 connected to the connecting portion 42 and engaged with the fan 10. The connecting portion 42 has a plate-like structure and is fixed to the first case 25 with a fastener. The mounting portion 43 is sleeved on the fan 10 and has a first hole 44 matching with the air inlet 11 and a second hole 45 matching with the air outlet 12.

Specifically, the first shell 25 has a mounting cavity 251 matched with the fan 10 and a first cavity 252 communicated with the mounting cavity 251 and matched with the mounting member 40. In the present embodiment, as shown in fig. 3, the first shell 25 is stepped. The installation cavity 251 is used for providing an installation space for the blower 10. The first cavity 252 is located above the mounting cavity 251 and surrounds the fan 10.

Further, the fan assembly further includes a partition 50 disposed in the first cavity 252, and the air guiding opening 41 and the air inlet 21 are located at two sides of the partition 50. In this embodiment, as shown in fig. 2, the partition 50 separates the air inlet 21 from the air guiding opening 41, so as to prevent the air flowing from the air inlet 21 from flowing directly from the air guiding opening 41 to the second air duct 222.

Specifically, the air guiding opening 41 and the air inlet opening 21 are exposed towards the first cavity 252. In this embodiment, as shown in fig. 3, the partition 50 includes a first baffle 51 and a partition 52 connected to the first casing 25, the first baffle 51 is disposed around the blower 10, and guides the air flowing from the air inlet 21, so that the air flows into the air guiding opening 41 after surrounding a circle along the first casing 25. The air guide opening 41 and the air inlet 21 are located on two opposite sides of the partition plate 52, and the first air duct 221 is formed in the first cavity 252, so that after air flows in from the air inlet 21, the air flows out from the air guide opening 41 around the fan 10 in the first cavity 252, the path length of the first air duct 221 is increased to the maximum extent, and the flowing time of the air in the first air duct 221 is increased. Therefore, the air passage path between the first pressure producing port 23 and the second pressure producing port 24 is increased, so that the covering path of the pressure producing section is improved, and the accuracy of flow monitoring is improved.

Specifically, the first pressure generating port 23 is disposed on the first casing 25 and exposed to the first cavity 252, and the first pressure generating port 23 and the air inlet 21 are located on different sides of the first casing 25. In this embodiment, as shown in fig. 3, since the first sampling pressure port 23 and the air inlet 21 are located on different sides of the first shell 25, external air flows into the first sampling pressure port 23 after flowing from the air inlet 21, and then flows to the first sampling pressure port 23 after turning, so that the external air is prevented from directly flowing to the first sampling pressure port 23 after entering the first air duct 221 from the air inlet 21, the influence of the air flow at the air inlet 21 on the air pressure detection at the first sampling pressure port 23 is reduced, and the detection accuracy of the pressure sensor at the first sampling pressure port 23 is improved. In addition, the first pressure sampling port 23 and the air guide port 41 are also located on different side surfaces of the first shell 25, so that the air pressure detection at the first pressure sampling port 23 can be prevented from being influenced by the air flow at the air guide port 41.

Specifically, the housing 20 further includes a second shell 26 connected to the first shell 25. In this embodiment, the second shell 26 and the mounting member 40 and the first shell 21 are fixed together by a fastener, that is, the connecting portion 42 of the mounting member 40 is fixed between the first shell 21 and the second shell 26.

Specifically, referring to fig. 4, the second casing 26 has a second cavity 261 communicated with the air guiding opening 41, and the fan assembly further includes a second baffle 60 disposed in the second cavity 261. In this embodiment, a second cavity 261 is formed inside the second casing 26, and the second cavity 261 is communicated with the first cavity 252 through the air guiding opening 41.

Specifically, the second baffle 60 extends from the air guide opening 41 toward the air inlet 11 in a curved manner. In this embodiment, as shown in fig. 4, the second baffle 60 is shaped like a volute, and can guide the gas entering the second chamber 261 from the air guide opening 41, so as to smoothly flow into the air inlet 11, thereby reducing the noise of the gas in the second chamber 261.

The second air path 222 is formed in the second chamber 261 between the second casing 26 and the second baffle 60. In this embodiment, which is illustrated in fig. 4 for gas flow, a second gas passage 222 is formed between the second housing 26 and the mounting member 40 and is located within the second chamber 261. The air guide port 41 is located at the side of the second casing 26, and the air inlet port 11 is located at the center of the second casing 26, which maximally increases the air passage path of the second air passage 222.

Specifically, the second pressure generating port 24 is disposed on the second casing 26 and exposed toward the second chamber 261, and the orifice 30 is disposed in the second chamber 261 and located on a different side of the second casing 26 from the second pressure generating port 24. In this embodiment, after entering the second air passage 222 through the air guiding opening 41, the air in the first air passage 221 passes through the throttling element 30 and the second pressure collecting opening 24, and finally flows into the fan 10 through the air inlet 11. Because throttle 30 and second adopt and press mouthful 24 to be located the different sides of second shell 26 for gaseous back through throttle 30, turn to and flow to second adopt and press mouthful 24 again, avoid gaseous direct flow to second adopt and press mouthful 24 after passing through throttle 30, and reduce the gas flow that throttle 30 department and cause the influence to the atmospheric pressure detection of second adopt and press mouthful 24 department, improve the accuracy that second adopt and press mouthful 24 department pressure sensor detected.

Specifically, referring to fig. 5, the throttle member 30 is configured as a porous honeycomb. In this embodiment, the throttle member 30 having a honeycomb structure can reduce the vortex effect and also reduce vibration and noise caused by disturbance of the air flow.

Specifically, the throttle member includes a plate-shaped throttle plate 31 and a plurality of throttle holes 32 provided in the throttle plate, and the plurality of throttle holes 32 are uniformly provided in the throttle plate 31. The thickness of the throttle plate 32 is configured to be between 2-30 mm. The orifice 32 has a hole diameter of 2-50mm, and the orifice 32 may be circular, square or other polygonal shape, and is preferably hexagonal. The number of the throttle holes 32 is configured to be between 1 and 30.

In particular, the orifice 30 is inserted in the second chamber 261. In this embodiment, the throttling element 30 is detachably disposed in the second chamber 261, so that the throttling element 30 can be conveniently mounted and dismounted. The second case 26 and the second baffle 60 are provided with the insertion grooves 70, so that the throttling element 30 with the plate-shaped structure can be conveniently inserted.

According to another aspect of the present invention there is also provided a ventilator provided with a fan assembly according to the present invention. The air outlet 12 of the blower 10 is in communication with the output conduit of the ventilator, which is in abutting contact with the second bore 45 of the mounting member 40.

It should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be appreciated by those skilled in the art that the specification as a whole may be appropriately combined to form other embodiments as will be apparent to those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A fan assembly, comprising:

a fan having an air inlet;

the device comprises a shell, a pressure sensor and a controller, wherein the shell is provided with an air inlet, an air inlet passage for communicating the air inlet and the air inlet, and a first pressure sampling port and a second pressure sampling port which are communicated with the air inlet passage;

the fan assembly is characterized by further comprising a mounting piece for connecting the fan and the shell, the mounting piece divides the air inlet air passage into a first air passage and a second air passage which are communicated with each other, the first pressure sampling port is communicated with the first air passage, and the second pressure sampling port is communicated with the second air passage.

2. The fan assembly of claim 1, wherein the first and second pressure ports are located on a same side of the housing.

3. The fan assembly of claim 1 wherein the flow direction of the first air path is consistent with the flow direction of the second air path and is consistent with the rotation direction of the fan wheel.

4. The fan assembly of claim 1 wherein the housing comprises a first shell forming the air inlet, and wherein the first air passage is formed between the first shell and the mounting member and is disposed circumferentially about an axis of the fan wheel.

5. The fan assembly of claim 4, wherein the mounting member has an air inlet opening for communicating the first air path with the second air path, the first housing has a mounting cavity for mating with the fan and a first cavity for communicating the mounting cavity and mating with the mounting member, the fan assembly further comprises a partition member disposed in the first cavity, the air inlet opening and the air outlet opening are located on both sides of the partition member, and both the air inlet opening and the air outlet opening are exposed toward the first cavity.

6. The fan assembly of claim 5, wherein the first plenum is disposed on the first casing and exposed toward the first chamber, and the first plenum and the air inlet are located on different sides of the first casing.

7. The fan assembly of claim 5 wherein the housing further comprises a second casing coupled to the first casing, the second casing having a second cavity in communication with the air inlet, the fan assembly further comprising a second baffle disposed in the second cavity, the second baffle curving from the air inlet toward the air inlet, the second air path being formed in the second cavity and between the second casing and the second baffle.

8. The fan assembly of claim 7, further characterized in that the second plenum is disposed on the second casing and exposed toward the second chamber, and the throttle member is disposed in the second chamber and on a different side of the second casing than the second plenum.

9. The fan assembly of claim 7 wherein the flow restriction is configured as a porous honeycomb and is inserted into the second chamber.

10. A ventilator comprising a fan assembly as claimed in any one of claims 1 to 9.