CN218961517U

CN218961517U - Fan subassembly and have its breathing machine

Info

Publication number: CN218961517U
Application number: CN202223357061.2U
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: 2023-05-05
Anticipated expiration: 2032-12-13

Abstract

A fan subassembly and have its breathing machine, this fan subassembly includes: the fan is provided with an air inlet, an air inlet channel for conducting the air inlet and the air inlet, and a first pressure collecting port and a second pressure collecting port which are communicated with the air inlet channel, the throttling piece is arranged in the air inlet channel and conducts the first pressure collecting port and the second pressure collecting port, the fan assembly further comprises a mounting piece for connecting the fan and the shell, the mounting piece separates the air inlet channel into a first air channel and a second air channel which are communicated with each other, the first pressure collecting port is communicated with the first air channel, and the second pressure collecting port is communicated with the second air channel; the mounting piece is utilized to separate the air inlet air passage from the two air passages, and the two pressure collecting ports are respectively arranged on the two air passages, so that the coverage path of the pressure collecting section in the air inlet air passage is improved, and the accuracy of flow monitoring is improved.

Description

Fan subassembly and have its breathing machine

Technical Field

The utility model relates to the field of medical equipment, in particular to a fan assembly and a respirator with the fan assembly.

Background

As an effective means for artificially replacing the spontaneous ventilation function, a ventilator has been widely used in respiratory failure due to various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation, and has taken a very important place in the field of modern medicine. A common ventilator includes a blower assembly for driving an airflow to a water tank assembly and for delivering the airflow to a mask worn by a patient in combination with water vapor generated by the water tank assembly.

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

Disclosure of Invention

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

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

a blower having an air inlet;

the shell is provided with an air inlet, an air inlet air passage for conducting the air inlet and the air inlet, and a first pressure collecting port and a second pressure collecting port which are communicated with the air inlet air passage;

the throttling piece is arranged in the air inlet air passage and is used for conducting the first pressure collecting port and the second pressure collecting port;

the fan assembly further comprises 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 collecting port is communicated with the first air passage, and the second pressure collecting port is communicated with the second air passage.

As a further improvement of an embodiment of the present utility model, the first pressure collecting port and the second pressure collecting port are located on the same side of the housing.

As a further improvement of one embodiment of the present utility model, the air passage flow direction of the first air passage is consistent with the air passage flow direction of the second air passage, and is consistent with the rotation direction of the fan impeller.

As a further improvement of one embodiment of the present utility model, the housing includes a first shell forming the air intake, and the first air passage is formed between the first shell and the mount and circumferentially disposed around the axis of the fan impeller.

As a further improvement of an embodiment of the present utility model, the mounting member has a wind guide opening for connecting the first air passage and the second air passage, the first housing has a mounting cavity matched with the fan and a first cavity communicating with the mounting cavity and matched with the mounting member, the fan assembly further includes a partition member disposed in the first cavity, the wind guide opening and the wind inlet are located at two sides of the partition member, and the wind guide opening and the wind inlet are exposed toward the first cavity.

As a further improvement of an embodiment of the present utility model, the first pressure collecting port is disposed on the first shell and is exposed toward the first cavity, and the first pressure collecting port and the air inlet are located on different sides of the first shell.

As a further improvement of an embodiment of the present utility model, the housing further includes a second housing connected to the first housing, the second housing having a second cavity communicating with the air guide port, the fan assembly further includes a second baffle disposed in the second cavity, the second baffle being bent to extend from the air guide port toward the air inlet, and the second air passage is formed in the second cavity between the second housing and the second baffle.

As a further improvement of an embodiment of the present utility model, the second pressure collecting port is disposed on the second shell and is exposed toward the second cavity, and the throttling element is disposed in the second cavity and is located on a different side surface of the second shell than the second pressure collecting port.

As a further improvement of an embodiment of the present utility model, the throttling element is configured as a porous honeycomb and is inserted into the second cavity.

In order to achieve the above object, the present utility model also provides a ventilator, which includes the fan assembly as described above.

Compared with the prior art, in the embodiment of the utility model, the mounting piece is used for separating the air inlet air passage from the two air passages, and the two pressure collecting ports are respectively arranged on the two air passages, so that the coverage path of the pressure collecting 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 utility model;

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 schematic perspective view of the second housing of FIG. 1 after being coupled to a throttle member;

fig. 5 is a schematic perspective view of the throttle member of fig. 1.

Detailed Description

The present utility model will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the utility model and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the utility model.

It will be appreciated that terms such as "upper," "lower," "outer," "inner," and the like, as used herein, refer to spatially relative positions and are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The term spatially relative position 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 should 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 used only to distinguish these descriptive objects from each other. For example, a first airway may be referred to as a second airway, and likewise, a second airway may be referred to as a first airway, without departing from the scope of this application.

Referring to fig. 1 to 5, a blower assembly for a household ventilator is provided in accordance with a preferred embodiment of the present utility model, and is generally used in conjunction with a water tank assembly, and is configured to drive a flow of air to the water tank assembly and to be delivered to a mask worn by a user in combination with water vapor generated by the water tank assembly.

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 on the ventilator by the housing 20.

Specifically, the blower 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 inlet channel for conducting the air inlet 21 and the air inlet 11, and a first pressure collecting port 23 and a second pressure collecting port 24 which are communicated with the air inlet channel. In the present embodiment, the first pressure producing port 23 and the second pressure producing port 24 are used for mounting pressure sensors.

Specifically, the throttling element 30 is disposed in the air intake passage and conducts the first pressure collecting port 23 and the second pressure collecting 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 acoustic energy. The first pressure collecting port 23 and the second pressure collecting port 24 are respectively located at the upstream and downstream of the throttling element 30, and as the flow passing area of the throttling element 30 is fixed, the flow value in the air inlet air channel can be calculated and obtained according to the Bernoulli principle after the pressure difference between the first pressure collecting port 23 and the second pressure collecting port 24 is obtained, and a user can adjust the rotating speed of the fan 10 to adjust the flow value according to the requirement.

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

Further, as shown with reference to 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 that communicate with each other. In this embodiment, after the mounting member 40 is mounted in the housing 20, the first air passage 221 and the second air passage 222 are formed after the internal space of the housing 20 is partitioned. 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 from the air inlet 21 into the air inlet 11 is increased.

Further, the first pressure collecting port 23 is communicated with the first air passage 221, and the second pressure collecting port 24 is communicated with the second air passage 222. In this embodiment, the air intake air passage includes a first non-pressure-collecting section communicating the air inlet 21 with the first pressure-collecting port 23, a pressure-collecting section communicating the first pressure-collecting port 23 with the second pressure-collecting port 24, and a second non-pressure-collecting section communicating the second pressure-collecting port 24 with the air inlet 11. Because the pressure section has covered first air flue 221 and second air flue 222 simultaneously to improve the coverage route of pressure section at whole air inlet air flue as far as possible, thereby improved flow monitoring's accuracy.

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

To sum up, two air passages are separated by utilizing the mounting piece 40, and two pressure collecting ports are respectively arranged on the two air passages, so that the coverage path of the pressure collecting section in the air passage is improved, and the accuracy of flow monitoring is improved.

Further, the first pressure collecting port 23 and the second pressure collecting port 24 are located on the same side of the casing. In this embodiment, as shown in fig. 1, the first pressure collecting port 23 and the second pressure collecting 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 collecting port 23 and the second pressure collecting port 24 are arranged in close proximity, thereby reducing the distance between the first pressure collecting port 23 and the second pressure collecting port 24, and facilitating the installation of pressure sensors at the first pressure collecting port 23 and the second pressure collecting port 24 by a user and the flow monitoring.

Further, the flow direction of the air passage of the first air passage 221 is consistent with the flow direction of the air passage of the second air passage 222. In the present embodiment, the air passage of the first air passage 221 is directed to the air flow diagram in fig. 3, and the air passage of the second air passage 222 is directed to the air flow diagram in fig. 4. The air channel flow direction of the first air channel 221 is consistent with the air channel flow direction of the second air channel 222, specifically, the air channel flow directions of the first air channel 221 and the second air channel 222 are kept clockwise or anticlockwise, so that the air flow communication between the first air channel 221 and the second air channel 222 is smoother, the air flow in the air inlet air channel is kept stable, the accuracy of the air pressure obtained by the two pressure collecting ports in the two air channels is ensured, and the accuracy of flow monitoring is improved.

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 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 air passage flow direction of the first air passage 221 and the air passage flow direction of the second air passage 222 also keep turning counterclockwise, so that the fan 10 more smoothly extracts air from the air inlet air passage, noise generated when the fan 10 sucks air is reduced, and noise generated by the air in the air inlet air passage is reduced.

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

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

Specifically, the first housing 25 has a mounting cavity 251 that mates with the fan 10 and a first cavity 252 that communicates with the mounting cavity 251 and mates with the mount 40. In this embodiment, as shown in fig. 3, the first case 25 is stepped. The mounting cavity 251 is used to provide a mounting 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 guide 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 guide 41, so as to prevent the air flowing into the air inlet 21 from directly flowing from the air guide 41 to the second air passage 222.

Specifically, the air guide opening 41 and the air inlet opening 21 are both exposed toward the first cavity 252. In this embodiment, as shown in fig. 3, the partition 50 includes a first baffle 51 and a partition plate 52 connected to the first shell 25, where the first baffle 51 is disposed around the fan 10, and guides the air flowing from the air inlet 21, so that the air flows into the air guide 41 after surrounding one week along the first shell 25. The air guide opening 41 and the air inlet 21 are positioned at two opposite sides of the partition plate 52, and the first air channel 221 is formed in the first cavity 252, so that after the 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 channel 221 is increased to the greatest extent, and the flowing time of the air in the first air channel 221 is increased. Therefore, the air passage path between the first pressure collecting port 23 and the second pressure collecting port 24 is increased, so that the coverage path of the pressure collecting section is improved, and the accuracy of flow monitoring is improved.

Specifically, the first pressure collecting opening 23 is disposed on the first shell 25 and is exposed towards the first cavity 252, and the first pressure collecting opening 23 and the air inlet 21 are located on different sides of the first shell 25. In this embodiment, as shown in fig. 3, since the first pressure collecting port 23 and the air inlet 21 are located on different sides of the first shell 25, after the external air flows in from the air inlet 21, the external air flows to the first pressure collecting port 23 after being diverted, so that the air is prevented from directly flowing to the first pressure collecting port 23 after entering the first air channel 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 pressure collecting port 23 is reduced, and the accuracy of the pressure sensor detection at the first pressure collecting port 23 is improved. Furthermore, the first pressure collecting port 23 and the air guide port 41 are also positioned on different sides of the first shell 25, so that the influence of the air flow at the air guide port 41 on the air pressure detection at the first pressure collecting port 23 can be avoided.

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

Specifically, with reference to fig. 4, the second housing 26 has a second cavity 261 in communication with the air guide 41, and the fan assembly further includes a second baffle 60 disposed in the second cavity 261. In the present embodiment, a second chamber 261 is formed inside the second case 26, and the second chamber 261 communicates with the first chamber 252 through the air guide 41.

Specifically, the second baffle 60 extends from the air guide 41 toward the air inlet 11. In this embodiment, as shown in fig. 4, the second baffle 60 has a volute shape, and can guide the gas entering the second cavity 261 from the air guide 41, so as to smoothly flow into the air inlet 11, thereby reducing the noise of the gas in the second cavity 261.

The second air passage 222 is formed in the second chamber 261 and is located between the second shell 26 and the second baffle 60. In this embodiment, the flow direction of the gas is schematically shown in fig. 4, and a second air passage 222 is formed between the second housing 26 and the mounting member 40 and is located in the second chamber 261. The air guide 41 is located at a side of the second case 26, and the air inlet 11 is located at a center of the second case 26, maximizing the air passage path of the second air passage 222.

Specifically, the second pressure collecting port 24 is disposed on the second shell 26 and is exposed toward the second cavity 261, and the throttling element 30 is disposed in the second cavity 261 and is located on a different side surface of the second shell 26 than the second pressure collecting port 24. In this embodiment, after the air in the first air channel 221 enters the second air channel 222 through the air guide 41, the air passes through the throttling element 30 and the second pressure collecting port 24 in sequence, and finally flows into the fan 10 through the air inlet 11. Because the throttling element 30 and the second pressure collecting port 24 are positioned on different sides of the second shell 26, after passing through the throttling element 30, gas flows to the second pressure collecting port 24 after being diverted, so that the gas is prevented from directly flowing to the second pressure collecting port 24 after passing through the throttling element 30, the influence of the gas flow at the throttling element 30 on the air pressure detection at the second pressure collecting port 24 is reduced, and the accuracy of the detection of the pressure sensor at the second pressure collecting port 24 is improved.

Specifically, with reference to fig. 5, the throttle 30 is configured in a porous honeycomb shape. In the present embodiment, the honeycomb-structured throttle 30 can reduce the vortex effect and also reduce vibration and noise caused by air flow disturbance.

Specifically, the throttling element includes a plate-shaped throttling plate 31 and a plurality of throttling holes 32 disposed on the throttling plate, wherein the plurality of throttling holes 32 are uniformly disposed on the throttling plate 31. The thickness of the throttle plate 32 is configured to be between 2-30 mm. The orifice 32 has an aperture configuration of between 2-50mm, and the orifice 32 may be circular, square or other polygonal in shape, and is preferably hexagonal. The number of orifices 32 is configured to be between 1 and 30.

Specifically, the throttle 30 is inserted into the second cavity 261. In this embodiment, the throttle member 30 is detachably disposed in the second cavity 261, so that the installation and the removal of the throttle member 30 are facilitated. By providing the slots 70 in the second housing 26 and the second baffle 60, the insertion of the plate-like structured orifice 30 is facilitated.

According to another aspect of the utility model, there is also provided a ventilator provided with a blower assembly according to the utility model. The air outlet 12 of the blower 10 is in communication with an output conduit of the ventilator, which is in abutment with the second aperture 45 of the mounting member 40.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. A fan assembly, comprising:

a blower having an air inlet;

the fan assembly is characterized by further comprising a mounting piece for connecting the fan and the shell, wherein 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 collecting port is communicated with the first air passage, and the second pressure collecting port is communicated with the second air passage.

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

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

4. The fan assembly of claim 1 wherein the housing includes a first shell defining the air intake, the first air passage being formed between the first shell and the mounting member and being circumferentially disposed about the axis of the fan wheel.

5. The fan assembly of claim 4 wherein the mounting member has a vent opening that communicates the first air passage with the second air passage, the first housing has a mounting cavity that mates with the fan and a first cavity that communicates with the mounting cavity and mates with the mounting member, the fan assembly further comprising a divider disposed within the first cavity, the vent opening and the air inlet opening being located on opposite sides of the divider, and both the vent opening and the air inlet opening being exposed toward the first cavity.

6. The fan assembly of claim 5 wherein the first pressure inlet is disposed on the first housing and exposed toward the first cavity, the first pressure inlet being on a different side of the first housing than the air inlet.

7. The fan assembly of claim 5 wherein the housing further comprises a second shell coupled to the first shell, the second shell having a second cavity in communication with the air scoop, the fan assembly further comprising a second baffle disposed within the second cavity, the second baffle extending curvedly from the air scoop toward the air inlet, the second air duct being formed within the second cavity and between the second shell and the second baffle.

8. The fan assembly of claim 7 wherein the second pressure recovery port is disposed on the second housing and exposed toward the second chamber, and the throttling element is disposed in the second chamber and on a different side of the second housing than the second pressure recovery port.

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

10. A ventilator comprising a blower assembly according to any one of claims 1-9.