Turbine pump and breathing machine

Abstract

The utility model relates to a turbo pump and a breathing machine. The turbine pump comprises an upper shell, a lower shell and a rotor, wherein the upper shell is provided with an air inlet; the lower shell is arranged below the upper shell, an installation space is defined by the lower shell and the upper shell, the lower shell is provided with an air outlet pipe communicated with the installation space, the air outlet pipe is spirally arranged on the surface, away from the upper shell, of the lower shell, and the longitudinal section area of the air outlet pipe is gradually increased in the air outlet direction; the impeller is rotatably arranged in the mounting space; and the brushless motor is located on the side, away from the upper shell, of the lower shell, and the output end of the brushless motor penetrates through the lower shell to be connected with the impeller so as to drive the impeller to rotate. In this way, the airflow can flow in the tangential direction of the spiral inner wall of the air outlet pipe, and stable conveying of the airflow is achieved. Meanwhile, the energy loss of the airflow in the air outlet pipe can be reduced, so that the gas flow and pressure of the airflow output by the turbine pump are increased, the response time of the turbine pump is guaranteed, and the use performance of the breathing machine is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of respiratory equipment, and in particular to a turbo pump and a ventilator. Background Art

[0002] A ventilator is a device that can replace, control or change a person's spontaneous breathing. The turbo pump is one of the core components of the ventilator, which is equivalent to the heart of the ventilator, providing the ventilator with the required air source. The flow, pressure and response time parameters of the turbo pump are directly related to the performance of the ventilator, and high-end medical ventilators have higher requirements for these parameters.

[0003] Generally, high-end medical ventilators require more stable and faster control of the gas source, which means that for the ventilator's control system, only when the response time of the turbo pump is faster can it reach a more stable state through feedback adjustment to improve the performance of the ventilator.

[0004] The response time of the turbo pump mainly depends on the motor performance and the rotational inertia of the impeller. The smaller the rotational inertia of the impeller, the faster the response time. However, if the rotational inertia is reduced blindly, the turbine output flow and pressure will inevitably decrease. However, it is currently impossible to ensure that the turbo pump has a smaller rotational inertia and a higher output flow and pressure, which affects the performance of the ventilator. Summary of the invention

[0005] Based on this, it is necessary to provide a turbo pump and a ventilator to address the current problem that it is impossible to ensure that the turbo pump has a small rotational inertia and a larger output flow pressure at the same time, which can achieve stable airflow delivery and ensure the gas flow and pressure of the output airflow while ensuring a small rotational inertia, so as to ensure the response time of the turbo pump and thus ensure the performance of the ventilator.

[0006] A turbo pump comprising:

[0007] An upper shell having an air inlet;

[0008] The lower shell is arranged below the upper shell and is surrounded by the upper shell to form an installation space. The lower shell has an air outlet pipe connected to the installation space. The air outlet pipe is spirally arranged on the surface of the lower shell away from the upper shell. The longitudinal cross-sectional area of ​​the air outlet pipe gradually increases along the air outlet direction.

[0009] an impeller rotatably disposed in the installation space; and

[0010] The brushless motor is located at a side of the lower housing away from the upper housing, and the output end of the brushless motor passes through the lower housing and is connected to the impeller to drive the impeller to rotate.

[0011] In one embodiment of the present application, the diameter of the air inlet is 1 / 3 to 1 / 5 of the diameter of the upper shell.

[0012] In one embodiment of the present application, the impeller includes a wheel disc and an even number of blades, the wheel disc is rotatably disposed on the wheel disc and connected to the brushless motor, and the even number of blades are evenly disposed on the wheel disc along the circumferential direction of the wheel disc.

[0013] In one embodiment of the present application, the impeller further includes a mounting portion, a central area of ​​the wheel disc has a mounting hole, the mounting portion is mounted in the mounting hole, and the output end of the brushless motor is mounted.

[0014] In one embodiment of the present application, the diameter of the impeller ranges from 25 mm to 40 mm;

[0015] The height dimension of the blade at the maximum height ranges from 3 mm to 6 mm.

[0016] In one embodiment of the present application, the minimum gap between the upper shell and the blade ranges from 1.2 mm to 1.24 mm.

[0017] In one embodiment of the present application, the impeller is made of polyetheretherketone material.

[0018] In one embodiment of the present application, the speed of the brushless motor is greater than or equal to 80,000 revolutions;

[0019] The turbo pump also includes a sensor, which is arranged in the brushless motor and electrically connected to the main unit of the ventilator. The sensor is used to detect the rotation speed of the brushless motor and feed it back to the main unit.

[0020] In one embodiment of the present application, the turbine pump further includes a sealing ring, which is disposed between the upper shell and the lower shell to seal a connection between the upper shell and the lower shell.

[0021] A ventilator comprises a main unit and a turbo pump as described in any of the above technical features, wherein the turbo pump is arranged in the main unit to provide an air source for the ventilator.

[0022] After adopting the above technical solution, this application has at least the following technical effects:

[0023] The turbo pump and ventilator of the present application, in the turbo pump, the upper shell is located above the lower shell, and is covered on the upper shell to enclose an installation space, the impeller is rotatably arranged in the installation space, the brushless motor is located below the lower shell, the output end of the brushless motor extends into the lower shell, and is connected to the impeller to drive the impeller to rotate in the installation space. The middle area of ​​the upper shell has an air inlet connected to the installation space, and the side of the lower shell away from the upper shell has an air outlet pipe connected to the installation space, and the longitudinal cross-sectional area of ​​the air outlet pipe gradually increases along the air outlet direction of the air flow. When the impeller rotates, it can suck the airflow from the air inlet into the installation space, and then transport the airflow to the air outlet pipe, and send it out through the air outlet pipe with a gradually increasing longitudinal cross-sectional area.

[0024] The turbine pump is provided with a spiral air outlet pipe below the lower shell. After the impeller rotates to pressurize and accelerate the airflow, the airflow can converge into the air outlet pipe, and then flow along the tangent direction of the spiral inner wall of the air outlet pipe to guide the flow of the airflow, avoid turbulence in the air outlet pipe, and achieve stable delivery of the airflow. At the same time, the longitudinal cross-sectional area of ​​the air outlet pipe gradually increases along the air outlet direction of the air outlet pipe to reduce the energy loss of the airflow in the air outlet pipe, thereby increasing the gas flow rate and pressure of the airflow output by the turbine pump. In this way, the gas flow rate and pressure of the output airflow can be guaranteed while reducing the turbine pump's small moment of inertia, so as to ensure the response time of the turbine pump and thus ensure the performance of the ventilator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a schematic diagram of a turbo pump viewed from one angle in an embodiment of the present application.

[0026] FIG. 2 is an exploded schematic diagram of the turbo pump shown in FIG. 1 .

[0027] FIG. 3 is a cross-sectional view of the turbo pump shown in FIG. 1 .

[0028] FIG. 4 is a schematic diagram of the impeller 130 in the turbo pump 100 shown in FIG. 2 .

[0029] FIG. 5 is a schematic diagram of the turbo pump 100 shown in FIG. 1 viewed from another angle.

[0030] Among them: 100, turbo pump; 110, upper shell; 111, air inlet; 120, lower shell; 121, air outlet; 130, impeller; 131, wheel disc; 132, blades; 133, mounting part; 140, brushless motor; 141, shell; 142, stator; 143, rotor; 144, high-speed bearing; 150, sensor; 160, sealing ring. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., or the like, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] Referring to Figures 1 and 2, the present application provides a turbopump 100. Figure 1 is a schematic diagram of a turbopump 100 in an embodiment of the present application viewed from an angle, and Figure 2 is an exploded schematic diagram of the turbopump 100 shown in Figure 1. The turbopump 100 is applied to a ventilator. When working, the turbopump 100 can pressurize and accelerate the airflow to deliver the airflow to the main unit of the ventilator, provide the ventilator with the required air source, and ensure the performance of the ventilator. Of course, in other embodiments of the present application, the turbopump 100 can also be applied to other equipment that requires the use of airflow. The present application is only described by taking the application of the turbopump 100 in a ventilator as an example.

[0038] It is understandable that the performance of the ventilator is related to the response time of the turbopump. Generally, the smaller the impeller's moment of inertia, the faster the response time. However, if the moment of inertia is reduced blindly, it will inevitably lead to a decrease in the turbine output flow and pressure. However, it is currently impossible to ensure that the turbopump has a smaller moment of inertia and a larger output flow pressure, which affects the performance of the ventilator. To this end, the present application provides a new type of turbopump 100, which can achieve stable delivery of airflow, and ensure the gas flow and pressure of the output airflow while ensuring a smaller moment of inertia, so as to ensure the response time of the turbopump 100, thereby ensuring the performance of the ventilator. The specific structure of the turbopump 100 of an embodiment is introduced below.

[0039] Referring to FIGS. 1 to 3 , in one embodiment, the turbopump 100 includes an upper housing 110, a lower housing 120, an impeller 130, and a brushless motor 140. The upper housing 110 has an air inlet 111. The lower housing 120 is disposed below the upper housing 110 and is surrounded by the upper housing 110 to form an installation space. The lower housing 120 has an air outlet pipe 120 connected to the installation space, and the air outlet pipe 120 is spirally disposed on the surface of the lower housing 120 away from the upper housing 110, and the longitudinal cross-sectional area of ​​the air outlet pipe 120 gradually increases along the air outlet direction. The impeller 130 is rotatably disposed in the installation space. The brushless motor 140 is located on a side of the lower housing 120 away from the upper housing 110, and the output end of the brushless motor 140 passes through the lower housing 120 to connect the impeller 130 to drive the impeller 130 to rotate. FIG. 3 is a cross-sectional view of the turbopump 100 shown in FIG. 1 .

[0040] The axial direction of the turbopump 100 is the central axis of the impeller 130 (as shown in FIG3 ), and the up-down direction of the turbopump 100 is the axial direction. As shown in FIG1 , the top of the turbopump 100 is the top and the bottom is the bottom. The up-down direction is also used for other components of the turbopump 100, which will not be described in detail later. Correspondingly, the circumferential direction (mentioned later) is the circumferential direction.

[0041] The upper housing 110 is disposed above the lower housing 120 and is covered above the lower housing 120. The upper housing 110 and the lower housing 120 are enclosed to form an installation space, and the impeller 130 is rotatably arranged in the installation space. The upper housing 110 and the lower housing 120 are the outer shell 141 of the turbo pump 100, and the upper housing 110 and the lower housing 120 are enclosed to form a channel for air flow to ensure pressurized delivery of the air flow and provide the required air source for the ventilator.

[0042] The brushless motor 140 is disposed below the lower housing 120 and connected to the lower housing 120. The output end of the brushless motor 140 extends through the lower housing 120 into the installation space and is connected to the impeller 130. The brushless motor 140 and the impeller 130 are coaxially disposed to ensure that the impeller 130 rotates smoothly and avoids eccentricity. The impeller 130 is coaxially disposed with the upper housing 110 and the lower housing 120, so that the impeller 130 does not contact the inner wall of the installation space when rotating, ensuring the smoothness of rotation and avoiding interference.

[0043] At the same time, the turbo pump 100 of the present application uses a brushless motor 140 to drive the impeller 130. It can be understood that the brushless motor 140 has the characteristics of fast response, large starting torque, and can provide rated torque from zero speed to rated speed, so as to ensure the performance of the brushless motor 140, thereby improving the response time of the turbo pump 100 and ensuring the performance of the turbo pump 100.

[0044] The middle area above the upper shell 110 has a through air inlet 111, which is connected to the installation space. The lower shell 120 has an air outlet duct 120, which is hollow and arranged below the lower shell 120. One end of the air outlet duct 120 is connected to the installation space, and the other end of the air outlet duct 120 is connected to the host. When the brushless motor 140 drives the impeller 130 to rotate, the airflow enters the installation space through the air inlet 111. After the impeller 130 rotates to pressurize the airflow, the airflow enters the air outlet duct 120 from the installation space and is sent out through the air outlet duct 120.

[0045] The air outlet pipe 120 is spirally arranged below the lower shell 120, and the longitudinal cross-sectional area of ​​the air outlet pipe 120 gradually increases along the air outlet direction of the air flow. The air outlet direction here refers to the flow direction of the pressurized air flow in the air outlet pipe 120. After the impeller 130 pressurizes the air flow, the air flow can converge into the air outlet pipe 120 and can flow along the tangential direction of the spiral of the air outlet pipe 120 to guide the flow of the air flow. At the same time, after the longitudinal cross-sectional area of ​​the air outlet pipe 120 gradually increases, the energy loss generated during the flow of the air flow can be reduced to increase the gas flow and pressure of the air flow of the turbo pump 100.

[0046] Optionally, the circumferential length of the air outlet pipe 120 is 1 / 2 to 1 times the spiral length. In this way, the flow path of the airflow can be guaranteed to avoid turbulence of the airflow after it is output through the air outlet pipe 120. Exemplarily, the circumferential length of the air outlet pipe 120 is the same as the spiral length. In other words, the air outlet pipe 120 is arranged in a circle, and since the longitudinal cross-sectional area of ​​the air outlet pipe 120 gradually increases, the position of the air outlet pipe 120 at the inlet will not block the outlet of the air outlet pipe 120.

[0047] The turbo pump 100 of the above-mentioned embodiment is provided with a spiral air outlet pipe 120 below the lower housing 120. After the impeller 130 rotates to pressurize and accelerate the airflow, the airflow can converge into the air outlet pipe 120, and then can flow along the tangent direction of the spiral inner wall of the air outlet pipe 120 to guide the flow of the airflow, avoid turbulence in the air outlet pipe 120, and achieve stable delivery of the airflow. At the same time, the longitudinal cross-sectional area of ​​the air outlet pipe 120 gradually increases along the air outlet direction of the air outlet pipe 120 to reduce the energy loss of the airflow in the air outlet pipe 120, thereby increasing the gas flow rate and pressure of the airflow output by the turbo pump 100. In this way, the gas flow rate and pressure of the output airflow can be guaranteed while reducing the turbo pump 100 having a small moment of inertia, so as to ensure the response time of the turbo pump 100, thereby ensuring the performance of the ventilator.

[0048] Optionally, the upper shell 110 and the lower shell 120 are connected and fixed by fasteners. The fasteners can ensure the reliability of the connection between the upper shell 110 and the lower shell 120, and prevent the lower shell 120 from being separated from the upper shell 110 during the operation of the ventilator. Optionally, the upper shell 110 and the lower shell 120 have fixing holes, and the fasteners pass through the upper shell 110 and are installed in the lower shell 120. Optionally, the fasteners are threaded parts. Of course, in the present application, the fasteners can also be pins, anchors or other components that can achieve reliable connection between the upper shell 110 and the lower shell 120.

[0049] 2 and 4 , in one embodiment, the impeller 130 includes a wheel disc 131 and an even number of blades 132. The wheel disc 131 is rotatably disposed on the wheel disc 131 and connected to a brushless motor 140. The even number of blades 132 are evenly disposed on the wheel disc 131 along the circumferential direction of the wheel disc 131. FIG4 is a schematic diagram of the impeller 130 in the turbo pump 100 shown in FIG2 .

[0050] The wheel disc 131 is rotatably mounted at the output end of the brushless motor 140, and the blades 132 are arranged on the wheel disc 131. When the brushless motor 140 drives the wheel disc 131 to rotate, the wheel disc 131 can drive the blades 132 to rotate synchronously, thereby realizing pressurized delivery of the airflow. Moreover, the blades 132 on the impeller 130 are an even number, and the even number of blades 132 are evenly distributed around the central axis of the wheel disc 131 to ensure the stability of the rotation of the impeller 130.

[0051] In the present application, the dynamic balance level of the impeller 130 is required to reach G2.5, so the processing accuracy of the blades 132 is required to be relatively high. At this time, an even number of blades 132 can be set on the wheel disc 131 to ensure that the airflow rising from the impeller 130 is symmetrically distributed, to ensure the smooth operation of the impeller 130, and to reduce the noise during the operation of the impeller 130. Optionally, the wheel disc 131 and the blades 132 are an integrated structure to ensure the reliability of the impeller 130 structure and reduce the assembly process.

[0052] Referring to FIG. 4 , in one embodiment, the impeller 130 further includes a mounting portion 133. The middle region of the wheel disc 131 has a mounting hole. The mounting portion 133 is mounted in the mounting hole and mounts the output end of the brushless motor 140. The mounting portion 133 facilitates the connection between the wheel disc 131 and the brushless motor 140, so as to transmit the rotational motion output by the brushless motor 140 to the wheel disc 131, so as to drive the wheel disc 131 to rotate, thereby realizing the control of the rotation of the impeller 130.

[0053] In one embodiment, the impeller 130 is made of polyetheretherketone (PEEK) material. In this way, the impeller 130 can have a core with high strength, low density, and small size, thereby reducing the moment of inertia of the impeller 130. Optionally, the impeller 130 is formed by injection molding.

[0054] 2 and 4 , in one embodiment, the diameter of the impeller 130 ranges from 25 mm to 40 mm. When the diameter of the impeller 130 is within the above range, the impeller 130 has a smaller diameter, and the impeller 130 is made of polyetheretherketone material, which can reduce the weight of the impeller 130 and further reduce the moment of inertia of the impeller 130.

[0055] Referring to FIG. 2 and FIG. 4 , in one embodiment, the height dimension range of the blade 132 at the maximum height is 3 mm to 6 mm. As shown in FIG. 4 , the dimension of the blade 132 at the maximum height is H. When the dimension H of the blade 132 at the maximum height is within the above range, the windward area of ​​the blade 132 can be reduced, thereby reducing the resistance during high-speed operation and making the response time faster. In other words, the present application reduces the windward area of ​​the blade 132 by limiting the dimension of the blade 132 at the maximum height, thereby increasing the corresponding speed.

[0056] Referring to Figures 1, 2 and 5, in one embodiment, the diameter of the air inlet 111 is 1 / 3 to 1 / 5 of the diameter of the upper shell 110. Figure 5 is a schematic diagram of the turbopump 100 shown in Figure 1 from another angle. After the air inlet 111 is limited by the above-mentioned size, the air inlet area of ​​the air inlet 111 can be reduced, so that the turbopump 100 has a smaller air inlet area, thereby increasing the output pressure of the airflow. In other words, compared with the current turbopump 100, the present application reduces the air inlet area of ​​the air inlet 111 of the turbopump 100, thereby increasing the output pressure of the airflow.

[0057] Optionally, the diameter of the air inlet 111 ranges from 14 mm to 18 mm, so that the air inlet 111 can have a smaller air inlet area, thereby increasing the output pressure of the airflow.

[0058] 3, in one embodiment, the minimum gap between the upper housing 110 and the blade 132 ranges from 1.2 mm to 1.24 mm. The minimum gap between the upper housing 110 and the blade 132 is the distance between the bottom of the upper housing 110 and the top of the blade 132. In other words, the gap L between the bottom of the upper housing 110 and the top of the blade 132 ranges from 1.2 mm to 2.4 mm, which can ensure the output pressure of the airflow and achieve the purpose of increasing the output pressure of the airflow.

[0059] It is understandable that if the gap L between the bottom of the upper housing 110 and the top of the blade 132 is less than 1.2 mm, the airflow will be over-compressed, which will produce large air vibrations and cause sharp noises, affecting the use of the ventilator. If the gap L between the bottom of the upper housing 110 and the top of the blade 132 is greater than 1.24 mm, the airflow will not be compressed enough, resulting in a sharp drop in the pressure of the turbo pump 100 output airflow. For this reason, the present application designs the gap L between the bottom of the upper housing 110 and the top of the blade 132 to be in the range of 1.2 mm to 2.4 mm to ensure the output pressure of the airflow.

[0060] Optionally, the air inlet area of ​​the air inlet 111 can be reduced to increase the output pressure of the airflow, and the minimum gap size between the upper shell 110 and the blade 132 can be limited to increase the output pressure of the airflow. In the present application, the air inlet 111 has a smaller air inlet area, and at the same time, the minimum gap size between the upper shell 110 and the blade 132 is limited to increase the delivery pressure of the airflow, thereby improving the response time of the turbo pump 100.

[0061] Referring to FIG. 1 and FIG. 2 , in one embodiment, the speed of the brushless motor 140 is greater than or equal to 80,000 revolutions. The brushless motor 140 uses a brushless DC motor with a speed greater than 80,000 revolutions to meet the use requirements of large flow. For example, in order to meet the requirements of large flow, the present application selects a 100,000-revolution brushless motor 140.

[0062] Referring to FIG. 3 , optionally, the brushless motor 140 includes a housing 141, a rotor 143, a stator 142, and a high-speed bearing 144. The housing 141 is installed below the lower housing 120. The rotor 143 is rotatably arranged in the housing 141. The stator 142 is arranged around the outer side of the rotor 143 and generates a magnetic field to drive the rotor 143 to rotate. The top of the rotor 143 extends into the installation space and is connected to the impeller 130. The high-speed bearing 144 supports the rotor 143 in the housing to prevent the rotor 143 from interfering with the housing when rotating, thereby ensuring the smooth rotation of the rotor 143 and further ensuring the smooth rotation of the impeller 130.

[0063] Referring to FIG. 4 , in one embodiment, the turbo pump 100 further includes a sensor 150, which is disposed in the brushless motor 140 and electrically connected to the main unit of the ventilator. The sensor 150 is used to detect the rotation speed of the brushless motor 140 and feed it back to the main unit. The sensor 150 can detect the rotation speed of the rotor 143 to determine whether the rotation speed of the rotor 143 can meet the use requirements.

[0064] Optionally, the sensor 150 is a high-speed Hall sensor. The response time is further improved through feedback control of the high-speed Hall sensor, so that it only takes 20 ms to increase the speed from 0 to 100,000.

[0065] 1 to 3 , the turbo pump 100 further includes a sealing ring 160, which is disposed between the upper shell 110 and the lower shell 120 to seal the connection between the upper shell 110 and the lower shell 120. The sealing ring 160 can ensure the sealing between the upper shell 110 and the lower shell 120, and prevent the airflow in the installation space from leaking from the connection between the upper shell 110 and the lower shell 120. It can be understood that the structural form of the sealing ring 160 is not limited in principle, and the connection between the upper shell 110 and the lower shell 120 can be sealed in the housing 141, the connection between the upper shell 110 and the lower shell can be sealed on the inside, and the connection between the upper shell 110 and the lower shell 120 can be sealed on both the inside and outside, as long as the sealing between the upper shell 110 and the lower shell 120 can be achieved.

[0066] The turbo pump 100 of the present application is provided with a spiral air outlet pipe 120 below the lower housing 120. After the impeller 130 rotates to pressurize and accelerate the airflow, the airflow can converge into the air outlet pipe 120, and then flow along the tangent direction of the spiral inner wall of the air outlet pipe 120 to guide the flow of the airflow, avoid turbulence in the air outlet pipe 120, and achieve stable delivery of the airflow. At the same time, the longitudinal cross-sectional area of ​​the air outlet pipe 120 gradually increases along the air outlet direction of the air outlet pipe 120 to reduce the energy loss of the airflow in the air outlet pipe 120, thereby increasing the gas flow rate and pressure of the airflow output by the turbo pump 100. In this way, the gas flow rate and pressure of the output airflow can be guaranteed while reducing the turbo pump 100 having a smaller moment of inertia, so as to ensure the response time of the turbo pump 100, thereby ensuring the performance of the ventilator.

[0067] In addition, an even number of blades 132 are set on the wheel disc 131 to ensure the stable operation of the impeller 130 and reduce the noise caused by the rotation of the impeller 130. In addition, the impeller 130 is made of polyetheretherketone material to reduce the moment of inertia while ensuring the structural strength of the impeller 130. The height dimension of the blade 132 at the maximum height is reduced to reduce the windward area, thereby reducing the resistance during high-speed operation and making the response time faster. At the same time, in order to meet the requirements of large flow, a high-speed brushless motor 140 is selected, and the response time is further improved through feedback control of the sensor 150. In addition, the air inlet area of ​​the air inlet 111 is reduced, and the minimum gap between the bottom of the upper shell 110 and the top of the blade 132 is controlled between 1.2mm and 1.24mm to increase the output pressure of the airflow. The air flow pressurized by the impeller 130 enters the spiral air outlet duct 120. The spiral air outlet duct 120 can make the air flow smoothly flow along the tangent direction of the inner wall of the air outlet duct 120, and the longitudinal cross-sectional area of ​​the air outlet duct 120 gradually increases along the air outlet direction, reducing the energy loss of the air flow in the air outlet duct 120, thereby increasing the flow rate of the air flow at the outlet of the turbine pump 100.

[0068] The present application also provides a ventilator, including a host and a turbo pump 100 as in any of the above embodiments, wherein the turbo pump 100 is arranged in the host to provide an air source for the ventilator. After the ventilator of the present application adopts the turbo pump 100 of the above embodiment, it can stably provide the required air source for the ventilator, and at the same time, it can also improve the response time to ensure the performance of the ventilator and reduce noise.

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A turbo pump, characterized in that: include: An upper shell having an air inlet; The lower shell is arranged below the upper shell and is surrounded by the upper shell to form an installation space. The lower shell has an air outlet pipe connected to the installation space. The air outlet pipe is spirally arranged on the surface of the lower shell away from the upper shell. The longitudinal cross-sectional area of ​​the air outlet pipe gradually increases along the air outlet direction. An impeller is rotatably disposed in the installation space; as well as The brushless motor is located at a side of the lower housing away from the upper housing, and the output end of the brushless motor passes through the lower housing and is connected to the impeller to drive the impeller to rotate.

2. The turbo pump according to claim 1, characterized in that: The diameter of the air inlet is 1 / 3 to 1 / 5 of the diameter of the upper shell.

3. The turbo pump according to claim 1, characterized in that: The impeller includes a wheel disc and an even number of blades. The wheel disc is rotatably arranged on the wheel disc and connected to the brushless motor. The even number of blades are evenly arranged on the wheel disc along the circumferential direction of the wheel disc.

4. The turbo pump according to claim 3, characterized in that: The impeller further comprises a mounting portion, a middle area of ​​the wheel disc comprises a mounting hole, the mounting portion is mounted in the mounting hole, and the output end of the brushless motor is mounted thereon.

5. The turbo pump according to claim 3, characterized in that: The diameter of the impeller ranges from 25 mm to 40 mm; The height dimension of the blade at the maximum height ranges from 3 mm to 6 mm.

6. The turbo pump according to claim 3, characterized in that: The minimum gap between the upper shell and the blades ranges from 1.2 mm to 1.24 mm.

7. The turbo pump according to any one of claims 1 to 6, characterized in that: The impeller is made of polyetheretherketone material.

8. The turbo pump according to any one of claims 1 to 6, characterized in that: The speed of the brushless motor is greater than or equal to 80,000 revolutions; The turbo pump also includes a sensor, which is arranged in the brushless motor and electrically connected to the main unit of the ventilator. The sensor is used to detect the rotation speed of the brushless motor and feed it back to the main unit.

9. The turbo pump according to any one of claims 1 to 6, characterized in that: The turbine pump further includes a sealing ring, which is disposed between the upper shell and the lower shell to seal a connection between the upper shell and the lower shell.

10. A ventilator, characterized in that: It comprises a host and a turbo pump as described in any one of claims 1 to 9, wherein the turbo pump is arranged in the host to provide an air source for the ventilator.

Images