CN215486736U - Fan and respirator with same - Google Patents

Abstract

The utility model discloses a fan which is used for a breathing machine and comprises a shell, wherein a first impeller, a motor extension shaft and a second impeller are further arranged in the shell, the first impeller, the motor and the second impeller are sequentially and coaxially connected through the motor extension shaft, the shell comprises a first shell and a second shell which are detachably connected, a first air inlet and a second air inlet are respectively arranged between the first shell and the second shell, and a first air outlet and a second air outlet which are adjacent and extend outwards are respectively arranged at the same position of the side edge of the first shell and the second shell. The fan and the breathing machine with the fan effectively increase the flow and the pressure of the fan and reduce the heating and the noise of the fan.

Description

Fan and respirator with same

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a fan and a breathing machine with the fan.

Background

The household respirator is a device which can replace, control or change the normal physiological respiration of a person, increase the lung ventilation, improve the respiratory function, reduce the consumption of the respiratory function and save the heart reserve capacity. The household ventilator (or called non-invasive ventilator) continuously provides oxygen for the patient through a given pressure, so as to improve the oxygen deficiency problem of the patient during sleep. The household respirator is mainly used for treating sleep apnea syndrome, namely severe snoring and accompanied breath holding symptoms, and can also be used for treating the complication of the sleep apnea syndrome, improving the blood oxygen concentration of a user in sleep at night, treating hypoxemia and the like.

The fan is a core part of the respirator, and the performance of the fan is closely related to the treatment effect of the respirator, so that the performance of the respirator is determined. The prior art fan generally adopts a single impeller, the impeller is arranged on a rotor mandrel of a single machine, the rotor mandrel is driven by a motor to drive the impeller to rotate, and the two ends of the motor of the prior fan are respectively provided with the impeller to pressurize gas and coaxially output the gas through an air inlet and an air outlet.

The prior art has the defects that the blower of the single impeller is limited in pressurizing gas, if the rotating speed needs to be increased when higher pressure is reached, the problems of high heat, high wind noise and the like are certainly brought, in addition, the conventional multi-impeller blower is complex in installation and design because a plurality of pairs of bearings are required for fixing a rotor shaft core, and an air inlet and an air outlet are coaxially arranged, so that the occupied space is large, and the gas pressure loss at the air outlet is high.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the fan and the breathing machine with the fan, so that the flow and the pressure of the fan are effectively increased, and the heating and the noise of the fan are reduced.

In order to achieve the purpose of the utility model, the utility model provides a fan for a respirator, which comprises a shell, a motor stator and a rotor mandrel, wherein the motor stator and the rotor mandrel are arranged in the shell, the shell is provided with an air inlet and an air outlet, one end of the rotor mandrel, which is close to the air inlet, is provided with a first impeller, one end of the rotor mandrel, which is close to the air outlet, is provided with a second impeller, the air inlet is configured to guide air to enter the fan along the axial direction, and the air outlet is configured to guide air to leave the fan along the tangential direction.

Preferably, the impeller has a plurality of impeller blades that accelerate the gas tangentially and direct the gas radially outwardly.

Preferably, the first impeller and the second impeller are the same in shape and size and are made from the same mold.

Preferably, the housing comprises a first housing and a second housing in sequence.

Preferably, the first housing includes an air intake part and a support part.

Preferably, the air inlet part is used for guiding air to enter the fan, and the supporting part is used for supporting the motor stator.

Preferably, the support member includes a motor case and a support case, and a connection sheet connecting the motor case and the support case.

Preferably, the distance between the motor casing and the support casing is 5-20 mm.

Preferably, the second housing includes a flow guide part and an air outlet part.

Preferably, the flow guiding component is used for transmitting the gas pressurized by the first impeller to the second impeller, and the air outlet component is used for guiding the gas to leave the fan.

According to another aspect of the present invention, there is also provided a ventilator comprising any one of the fans described above.

The utility model has the beneficial effects that: compared with the traditional fan, the fan provided by the utility model has the double impellers which rotate coaxially, the pressure and the flow of the fan are effectively improved under the condition that the rotating speed of the motor is not changed, meanwhile, the rotating speed of the motor can be reduced, the heating and the generated noise are reduced, the boosting speed is improved, and the working pressure and flow range of the breathing machine is enlarged when the same pressure is realized.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below.

FIG. 1 is a cross-sectional view of a blower according to the present invention.

Fig. 2 is a schematic structural diagram of the air inlet component of the fan of the present invention.

FIG. 3 is a schematic structural view of a fan support according to the present invention.

Fig. 4 is a schematic structural diagram of a fan flow guiding component of the utility model.

Fig. 5 is a schematic structural view of the fan outlet component of the present invention.

Fig. 6 is an exploded view of the fan of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.

As shown in fig. 1 to 6, the present invention provides a blower for a ventilator, the blower includes a housing, and a motor stator 3 and a rotor spindle 2 disposed in the housing, the housing is provided with an air inlet 111 and an air outlet 143, an end of the rotor spindle 2 close to the air inlet 111 is provided with a first impeller 4, an end of the rotor spindle 2 close to the air outlet 143 is provided with a second impeller 5, the air inlet 111 is configured to guide air to enter the blower along an axial direction L, and the air outlet 143 is configured to guide air to leave the blower along a tangential direction S.

In the embodiment of the present invention, a shaft sleeve-shaped gap is formed between the housing and the motor stator 3, and the air enters from the air inlet 111, is accelerated by the first impeller 4, enters the second impeller 5 through the gap, and exits from the fan along the tangential direction S of the second impeller 5 after being accelerated by the second impeller 5. The first impeller 4 and the second impeller 5 are coaxially connected through the rotor spindle 2, so that gas can be accelerated through the two-stage impellers, higher pressure and flow can be obtained at the same rotating speed, and the heating of the motor stator 3 and the noise generated by the high-speed rotation of the impellers are reduced. In addition, the air outlet 143 is tangentially arranged to the second impeller 5, so that the two-stage accelerated gas can directly leave the fan, and energy loss caused by blocking of an air duct in the fan is reduced.

Further, the first impeller 4 and the second impeller 5 have a plurality of impeller blades that accelerate the gas in the tangential direction S and direct the gas radially outward. The impeller blades rotate at high speed, and air between adjacent blades is centrifugally accelerated, so that high-pressure and high-flow-speed airflow is generated.

Further, the first impeller 4 and the second impeller 5 are the same in shape and size and are made of the same mold. On the one hand, the impeller is convenient to manufacture, the production cost is reduced, and on the other hand, two same impellers are arranged at two ends of the same motor stator 3, so that the motor stator 3 works stably and has a compact structure.

Further, the shell includes first shell, second shell in proper order. The advantage of the division of the housing into a first housing and a second housing is that: on the one hand, the motor stator 3 is convenient to assemble, disassemble and install, and on the other hand, the shell is convenient to produce and process.

Further, the first housing includes an air intake part 11 and a support part 12. Wherein air intake part 11 includes air intake 111 and the pressure plate 112 that the axis department set up, and air intake 111 is used for guiding gas to get into the fan, adds pressure plate 112 and first impeller 4 formation pressure space, makes gas throw away after being accelerated by the centrifugation from the pressure space of impeller blade.

Further, the air inlet part 11 is used for guiding air into the blower, and the supporting part is used for supporting the motor stator 3.

Further, the support member 12 includes a motor case 121 and a support case 123, and a connection sheet 122 connecting the motor case 121 and the support case 123. Specifically, in the embodiment of the present invention, the supporting member 12 includes a supporting housing clamped between the air inlet member 11 and the second housing, a motor housing 121 fitted over the outer surface of the motor stator 3, and a connecting sheet 122 connecting the motor housing 121 and the supporting housing 123. The connecting thin sheet 122 is set to be inclined in the same direction as the air outlet direction of the first impeller 4, so that on one hand, the pressure and flow loss of the air flow is reduced, and on the other hand, the air flow enters the next stage to be accelerated again more stably and uniformly.

Furthermore, the distance between the motor casing 121 and the supporting casing 123 is 5mm-20mm, and experiments show that when the distance between the motor casing 121 and the supporting casing 123 is less than 5mm, airflow cannot effectively enter a next-stage impeller to accelerate; when the distance between the motor casing 121 and the supporting casing 123 is greater than 20mm, the pressure loss of the airflow is large, and the pressurizing effect caused by the acceleration of the first impeller 4 is lost.

Further, the second housing includes a flow guiding component 13 and an air outlet component 14, in the embodiment of the present invention, the flow guiding component 13 and the air outlet component 14 are separated, which not only facilitates the installation of the second impeller 5, but also reduces the processing and production difficulty, and reduces the production cost, and of course in other embodiments, the flow guiding component 13 may be integrally formed with the support housing, or the flow guiding component 13 is designed into two halves with central symmetry, which also belongs to the protection scope of the present invention.

Further, the flow guiding component 13 is used for conveying the gas pressurized by the first impeller 4 to the second impeller 5, and the air outlet component 14 is used for guiding the gas to leave the fan.

In the embodiment of the present invention, the flow guiding component 13 is formed into an annular supporting portion 131 and an arc-shaped flow guiding sheet 132 integrally connected with the annular supporting portion, the arc-shaped flow guiding sheets are uniformly in a clockwise or counterclockwise direction and are consistent with the air outlet direction of the first impeller 4, in addition, an air outlet circular hole is arranged at the bottom of the flow guiding component 13, and the air is guided by the flow guiding sheet 132, enters the air outlet circular hole, and then is accelerated by the second impeller 5 until leaving the fan.

According to a further aspect of the utility model, there is also provided a ventilator comprising a blower as described in any one of the above.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (10)

1. The utility model provides a fan for breathing machine, its characterized in that, the fan includes the shell to and motor stator and the rotor dabber of setting in the shell, be equipped with air intake and air outlet on the shell, the one end that the rotor dabber is close to the air intake is provided with first impeller, the one end that the rotor dabber is close to the air outlet is provided with the second impeller, the air intake structure is for leading gaseous along the axial entering fan, the air outlet structure is for leading gaseous along the tangential fan that leaves.

2. The fan as set forth in claim 1 wherein the impeller has a plurality of impeller blades that tangentially accelerate the gas and direct the gas radially outward.

3. The fan of claim 1 wherein the first impeller and the second impeller are the same size and shape and are made from the same mold.

4. The blower of claim 1, wherein the enclosure comprises, in order, a first enclosure and a second enclosure.

5. The blower of claim 4, wherein the first housing includes an intake member for directing gas into the blower and a support member for supporting the motor stator.

6. The blower of claim 5, wherein the support member comprises a motor housing and a support housing, and a connection tab connecting the motor housing and the support housing.

7. The fan of claim 6 wherein the motor housing is spaced from the support housing by between 5mm and 20 mm.

8. The blower of claim 4, wherein the second housing includes a flow directing member and an air outlet member.

9. The fan of claim 8, wherein the flow directing member is configured to direct the pressurized air from the first impeller to the second impeller, and the air outlet member is configured to direct the air away from the fan.

10. A ventilator characterized in that it comprises a blower according to any one of claims 1-9.

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