Breathing machine

Abstract

The utility model relates to the technical field of medical instruments, and discloses a breathing machine which comprises a partition plate, a bottom shell, a motor body, an upper cover, a circuit board, a fairing, a water tank and a silencing box. The partition plate is assembled on the bottom shell, and the motor body is mounted on the partition plate; a fairing is detachably and fixedly arranged on the motor body; the upper cover is detachably and fixedly arranged on the partition plate; the partition plate is provided with a first honeycomb pipe and a plurality of second honeycomb pipes. The circuit board is detachably fixed on the upper cover; a digital differential pressure sensor and a pressure sensor are arranged on the circuit board; the digital differential pressure sensor is connected to a sampling port of the differential pressure sensor through a silicone tube; the pressure sensor is connected to the pressure sensor sampling port through a silicone tube; the water tank is assembled on the bottom shell; and a silencing box is fixedly arranged on the bottom shell. According to the scheme, the whole structure of the breathing machine is more compact and reliable, the number of parts of the whole breathing machine is reduced, the assembling efficiency is improved, and the safety and reliability of the breathing machine used by a patient are improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more specifically, to a ventilator. Background Art

[0002] Sleep health is being paid more and more attention by people. It has been clinically verified that ventilators are very effective in improving obstructive sleep apnea (OSA) and chronic obstructive pulmonary disease (COPD).

[0003] The important components of a ventilator are the main air circuit and the water tank. When the ventilator is working, the motor is used to generate high-pressure gas higher than atmospheric pressure, which is blown into the water tank through the air circuit. The water tank is humidified and then sent into the patient's respiratory tract. However, during the actual test process, the applicant found that the existing ventilators still have at least the following deficiencies: the internal structure of the ventilator is relatively loose, and the air circuit module part and the main body bottom shell part are only assembled, which increases the overall volume of the ventilator and poses hidden dangers such as reduced use effect during use. The motor impeller rotates at high speed, and the vibration noise generated by the impeller rotation and the wind noise generated by the impeller cutting the airflow are transmitted to the outside through the connecting airway. When the noise value and vibration are relatively large, it will seriously affect the user's sleep and comfort.

[0004] In order to solve the above problems, this specification aims to provide a ventilator. Utility Model Content

[0005] The purpose of the utility model is to provide a ventilator.

[0006] To achieve the above-mentioned object, the present invention provides a ventilator, which comprises:

[0007] A bottom shell having an air inlet communicating with the outside atmosphere;

[0008] A partition, the partition being mounted on the bottom shell, the partition being provided with a motor accommodating cavity, the motor body being mounted in the motor accommodating cavity;

[0009] an upper cover, the upper cover being mounted on the partition;

[0010] A water tank is assembled on the bottom shell.

[0011] The circuit board can be screwed onto the circuit board fixing screw holes. A digital differential pressure sensor and a pressure sensor are provided on the circuit board;

[0012] The circuit board is provided with a sampling port for a differential pressure sensor and a sampling port for a pressure sensor;

[0013] The digital differential pressure sensor can be connected to the sampling port of the differential pressure sensor with a silicone tube.

[0014] The pressure sensor can be connected to the sampling port of the pressure sensor by a silica gel tube.

[0015] The muffling box upper cover and the muffling box body are provided with clamping grooves.

[0016] The gas rectifier cover is inserted into the clamping grooves of the muffling box upper cover and the muffling box body.

[0017] A display screen is fixedly connected to the display screen fixing frame.

[0018] The ventilator is configured to form a first-stage sound attenuation cavity and a second-stage sound attenuation cavity between the baffle and the bottom shell; the first-stage sound attenuation cavity is from the air inlet of the bottom shell to the first-stage sound attenuation cavity outlet B of the honeycomb tube, and the second-stage sound attenuation cavity is from the first-stage sound attenuation cavity outlet B of the honeycomb tube to the second-stage sound attenuation cavity outlet C of the honeycomb tube. Between the baffle and the upper cover, the third-stage sound attenuation cavity is from the second-stage sound attenuation cavity outlet C of the honeycomb tube to the air inlet D of the motor suction cavity, the fourth-stage sound attenuation cavity is from the air inlet D of the motor suction cavity to the air inlet E of the rectifier cover, and the fifth-stage sound attenuation cavity is from the air inlet E of the rectifier cover to the air outlet F of the muffling box. The humidification cavity is from the air outlet F of the muffling box to the patient connection port in the water tank.

[0019] The related contents of the utility model are explained as follows:

[0020] As an optional scheme of the utility model, the ventilator is designed to have a bottom shell, a baffle and an upper cover, and a first-stage sound attenuation cavity and a second-stage sound attenuation cavity are formed between the baffle and the bottom shell. The baffle and the upper cover are separated by the motor body to form a third-stage sound attenuation cavity in front of the air inlet of the motor body and a fourth-stage sound attenuation cavity in the motor body, and a fifth-stage sound attenuation cavity from the air inlet of the rectifier cover to the air outlet of the muffling box and a humidification cavity in the water tank. The baffle is provided with a first-stage sound attenuation cavity and a second-stage sound attenuation cavity airflow passage honeycomb tube, so that the original air path module separated and installed in the ventilator bottom shell is optimized and simplified, the ventilator bottom shell can also be part of the air path module, and the air entering the air path module of the ventilator enters the first-stage sound attenuation cavity and the second-stage sound attenuation cavity from the air inlet, then enters the third-stage sound attenuation cavity formed by the baffle and the upper cover from the airflow passage, and is blown by the motor body to the fifth-stage sound attenuation cavity and then enters the water tank. Through such a flow channel design, the air flow can be stabilized and the air flow noise can be reduced without additional corresponding pipelines. The original excess gap in the bottom shell can be fully utilized. At the same time, the realization of the air flow monitoring function can be realized by relying on this arrangement, without the need for additional pipelines, so that the overall structure of the ventilator is more compact and reliable, the overall parts of the ventilator are reduced, the structure is ingenious and reasonable, the assembly is simplified, the assembly efficiency and quality are improved, and the safety and reliability of the ventilator for patients are also improved. As a medical product, the ventilator can make the use of patients safer and more stable.

[0021] As an optional solution of the present invention, the partition and the upper cover are provided with a first sampling port connected to the first-level silencer chamber, a second sampling port connected to the second-level silencer chamber, and a third sampling port connected to the fifth-level silencer chamber. Corresponding to the first sampling port, the second sampling port, and the third sampling port, monitoring sensors are provided on the circuit board of the ventilator. A honeycomb sampling tube is provided, and the airflow passes through the sampling air inlet on the silencer box → the sampling hole → the sampling port on the digital differential pressure sensor and the pressure sensor on the circuit board, achieving the shortest linear sampling distance and the shortest sampling signal time. Through algorithm control, the response speed of the motor can be improved.

[0022] As an optional solution of the present invention, a soft rubber seal is provided on a local surface of the partition, and the soft rubber seal is configured to act at least on the connection between the partition and the bottom shell, and the connection between the partition and the upper cover, to perform sealing between the mating components, which can effectively reduce shock and noise and improve quality.

[0023] As an optional solution of the present invention, the five-level silencer cavity is formed by the connection and cooperation between the soft rubber seal and the air outlet joint of the motor body and the air inlet of the fairing. The air outlet joint of the motor body also cooperates with the soft rubber seal, which has the effect of reducing vibration and noise.

[0024] As an optional solution of the present invention, an airflow guide groove is provided on the gas fairing, and the airflow guide groove is surrounded by adjacent involute baffles, and the involute baffles are evenly distributed. When the airflow enters the airflow guide groove from the fairing air inlet circular groove, the messy airflow moves along each involute and is output at the position of the gas rectification protrusion, thereby achieving the purpose of rectification and making the output airflow smoother. The parameters of the airflow guide groove and the number to be used can be designed according to the selected motor model. At the same time, using the acoustic resonance phenomenon, when the gas flow speed continues to increase, the density and pressure in the fluid also increase accordingly. When it reaches a certain specific value, the gas in the airflow guide groove will produce resonant fluctuations, the gas will slow down, and will be affected by the path difference effect and sound wave reflection, thereby reducing low-frequency noise.

[0025] Due to the application of the above scheme, the utility model has the following advantages and effects compared with the prior art:

[0026] 1.The utility model discloses a gas from the air inlet enters the first stage sound attenuation chamber and the second stage sound attenuation chamber again from the airflow channel enters the third stage sound attenuation chamber formed by the partition and the upper cover, and is blown by the motor body again enters the water tank after the fifth stage sound attenuation chamber, through such flow channel design, utilize the first stage sound attenuation chamber formed between the bottom shell and the partition as the air inlet flow path of air inlet flow channel, can stabilize airflow, reduce airflow noise under the condition of not setting the corresponding pipeline additionally, can make full use of the originally excessive gap part in the bottom shell.

[0027] 2.The utility model discloses a first sampling port that is connected to the first stage sound attenuation chamber, a second sampling port that is connected to the second stage sound attenuation chamber and a third sampling port that is connected to the fifth stage sound attenuation chamber are arranged on the partition and the upper cover, and monitoring sensors are arranged on the circuit board of the breathing machine corresponding to the first sampling port, the second sampling port and the third sampling port. The realization of airflow monitoring function can be realized by relying on this arrangement, without the need for additional pipeline, reducing the number of parts and the volume of the breathing machine.

[0028] The utility model can stabilize airflow, reduce airflow noise without additional corresponding pipeline, make full use of the originally excessive gap part in the bottom shell, make the overall structure of the breathing machine more compact and reliable, reduce the overall parts of the breathing machine, make the structure ingenious and reasonable, make the assembly simple, improve the assembly efficiency and quality, thereby improve the safety and reliability of the patient using the breathing machine, and the breathing machine as a medical product can make the use of the patient safer and more stable. DRAWINGS

[0029] Figure 1 It is a structure schematic view of the breathing machine of the utility model embodiment.

[0030] Figure 2 It is an assembly schematic view of the breathing machine of the utility model embodiment.

[0031] Figure 3 It is an explosion schematic view of the breathing machine of the utility model embodiment.

[0032] Figure 4 It is an assembly schematic view of the partition, the upper cover, the motor body and other components in the utility model embodiment.

[0033] Figure 5 It is a schematic view of the assembly of the motor body and the partition in the bottom shell in the utility model embodiment.

[0034] Figure 6 It is a top view schematic view of the breathing machine after removing part structure in the utility model embodiment.

[0035] Figure 7 It is a schematic view of the bottom shell in the utility model embodiment.

[0036] Figure 8 It is the three-dimensional schematic view of the partition plate in the embodiment of the utility model;

[0037] Figure 9 It is the three-dimensional schematic view of the upper cover in the embodiment of the utility model;

[0038] Figure 10 It is the sectional schematic view of the upper cover in the embodiment of the utility model;

[0039] Figure 11 It is the sectional schematic view of the breathing machine (direction one) in the embodiment of the utility model;

[0040] Figure 12 It is the sectional schematic view of the breathing machine (direction two) in the embodiment of the utility model;

[0041] Figure 13 It is the sectional schematic view of the breathing machine (direction three) in the embodiment of the utility model;

[0042] Figure 14 It is the sectional schematic view of the breathing machine (direction four) in the embodiment of the utility model;

[0043] Figure 15 It is the whole airflow direction schematic view of the breathing machine in the embodiment of the utility model;

[0044] Figure 16 It is the flow direction schematic view of the airflow of the breathing machine in the embodiment of the utility model from the first-order sound absorbing cavity into the second-order sound absorbing cavity;

[0045] Figure 17 It is the flow direction schematic view of the airflow of the breathing machine in the embodiment of the utility model from the second-order sound absorbing cavity into the third-order sound absorbing cavity;

[0046] Figure 18 It is the flow direction schematic view of the airflow of the breathing machine in the embodiment of the utility model from the third-order sound absorbing cavity into the motor body;

[0047] Figure 19 It is the flow direction schematic view of the airflow of the breathing machine in the embodiment of the utility model from the motor body into the fifth-order sound absorbing cavity.

[0048] Markings in the figure:

[0049] 1. bottom shell; 2. partition; 3. motor body; 4. upper cover; 5. circuit board; 9. water tank; 10. accommodating space; 11. air inlet; 21. motor accommodating cavity; 22. honeycomb tube two; 23. honeycomb tube one; 24. soft rubber sealing element; 25. sampling extension pipeline; 31. motor air inlet; 32. air outlet; 33. motor silica gel sleeve; 34. motor protective cover; 35. fairing; 41. first sampling port; 42. second sampling port; 43. third sampling port; 51. monitoring sensor; 52. electronic element; 60. primary sound attenuation cavity; 70. secondary sound attenuation cavity; 80. fifth sound attenuation cavity; 91. water tank air flow pipeline portion; 911. humidification cavity; 92. water tank water storage portion; 93. sealing ring; 931. sealing sleeve; 111, air inlet pipe;

[0050] A, bottom shell air inlet; B, honeycomb tube one air outlet; C, honeycomb tube two air outlet; motor suction cavity air inlet D; fairing air inlet E; sound attenuation box air outlet F. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0052] The application will be further described in detail below with reference to the drawings of the specification.

[0053] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the breathing machine comprises a partition 2, a bottom shell 1, a motor body 3, an upper cover 4, a circuit board 5, a fairing 35, a water tank 9 and a sound attenuation box;

[0054] The bottom shell 1 and the partition 2 are detachably fixed together; the bottom shell 1 is detachably fixed with the upper shell; the partition 2 is detachably fixed with the upper cover 4;

[0055] The motor body 3 is detachably fixed in the partition 2; the motor body 3 is detachably fixed with the fairing 35; the bottom shell 1 is provided with an air inlet 11;

[0056] The upper cover 4 is detachably provided with the circuit board 5; the circuit board 5 controls various functions of the breathing machine, which is installed on the upper cover 4, ensuring the stability and easy maintenance of the circuit.

[0057] The partition plate 2 is provided with a plurality of honeycomb tubes 23, and the partition plate 2 is provided with a plurality of honeycomb tubes 22;

[0058] The bottom shell 1 is fixedly provided with a water tank 9. The bottom shell 1 is fixedly provided with a sound reduction box.

[0059] The bottom shell 1 is provided with a containing space 10. The sound reduction box is provided with a sound reduction box air outlet F.

[0060] The partition plate 2 and the bottom shell 1 form a first sound reduction cavity 60 and a second sound reduction cavity 70; the first sound reduction cavity 60 is located in front of the air inlet of the honeycomb tube 23, and the second sound reduction cavity 70 is located behind the air outlet of the honeycomb tube 23, so that the noise generated by the gas flow is effectively reduced. The partition plate 2 and the upper cover 4 are separated by the motor body 3 into a third sound reduction cavity and a fourth sound reduction cavity; the third sound reduction cavity is located in front of the air inlet of the motor body 3, and the fourth sound reduction cavity is located inside the motor body 3, further reducing the noise of the motor during operation. The rectifier cover air inlet to the sound reduction box air outlet forms a fifth sound reduction cavity, and the water tank 9 is internally provided with a humidification cavity 911 for humidifying the inhaled gas to improve the comfort of use.

[0061] In this technical solution, the breathing machine realizes high efficiency and low noise through the careful design of the structure and multiple sound reduction cavities. At the same time, the humidifying function of the water tank increases the comfort of use. The detachable design facilitates maintenance and part replacement, improving the overall maintainability and service life of the equipment.

[0062] Reference is made to the accompanying drawings Figure 4 The partition plate 2 is provided with a motor containing cavity 21, and the motor containing cavity 21 is provided with a motor silica gel sleeve 33 and a motor protective cover 34. The motor silica gel sleeve 33 and the motor protective cover 34 constitute an elastic support for installing the motor body 3 to elastically limit the motor body 3. First, no additional parts are needed, and second, the elastic and friction of the silica gel parts can be used to elastically limit the motor body 3, so that the motor body 3 and the partition plate 2 can have good soft connection and buffering. The design is ingenious, which can effectively reduce the vibration of the motor body 3, and sufficient friction and limiting can also ensure the firm installation of the motor body 3, reducing vibration and noise. The motor body 3 is provided with a motor air inlet 31.

[0063] Reference is made to the accompanying drawings Figure 6 , the accompanying drawings Figure 7 , the accompanying drawings Figure 8 , the accompanying drawings Figure 9 , the accompanying drawings Figure 10 , the accompanying drawings Figure 11 and the accompanying drawings Figure 12The upper cover 4 is provided with a first sampling port 41, a second sampling port 42 and a third sampling port 43; the first sampling port 41 communicates with the first-stage sound attenuation cavity 60; the second sampling port 42 communicates with the second-stage sound attenuation cavity 70, and the third sampling port 43 communicates with the fifth-stage sound attenuation cavity 80; on the circuit board 5 of the breathing machine, monitoring sensors 51 are arranged corresponding to the first sampling port 41, the second sampling port 42 and the third sampling port 43. The arrangement of the sampling ports ensures the relative stability of the airflow at the sampling points, reducing the influence of airflow fluctuations on measurement accuracy. This layout makes the measurement data more reliable, helping to improve the performance and treatment effect of the breathing machine. At the same time, the sampling ports are integrally arranged with the upper cover 4, and the sampling ports are directly connected to the first chamber 60, the second chamber 70 and the fifth-stage sound attenuation cavity 80, and the monitoring sensors 51 are also connected to the sampling ports, so as to monitor the airflow parameters such as high pressure, low pressure and flow rate, avoiding the arrangement of additional monitoring air paths, and reducing the number of several connectors and pipeline parts. Reducing the number of parts and connectors means reducing potential failure points and air leakage risks. At the same time, since the sampling points are located in a relatively stable airflow position, the impact and wear of the sensors and other components caused by airflow fluctuations are reduced, thereby improving the reliability and service life of the entire system.

[0064] Reference is made to the accompanying drawings Figure 14 The honeycomb tube two 22 on the partition plate 2 communicates the second-stage sound attenuation cavity and the third-stage sound attenuation cavity, and the air entering the first-stage sound attenuation cavity 60 from the air inlet 11 enters the second-stage sound attenuation cavity 70 along the air inlet flow channel through the honeycomb tube one 23, and enters the motor body 3 through the honeycomb tube two 22. The honeycomb tube two 22 is not arranged on the outside or the periphery, and does not occupy the space outside the air path module. Similarly, it is also an optimization of space, and the honeycomb tube two 22 is integrally arranged with the partition plate 2 to reduce the number of parts. By optimizing the airflow path and reducing the number of parts, the overall efficiency of the breathing machine is improved. Reducing airflow resistance and energy loss means that more energy can be used to generate the required airflow and pressure, thereby improving the treatment effect and patient comfort.

[0065] Reference is made to the accompanying drawings Figure 15 , the accompanying drawings Figure 16 , the accompanying drawings Figure 17 , the accompanying drawings Figure 18 the accompanying drawings Figure 19 :

[0066] The first-stage sound attenuation cavity 60 forms an air inlet flow channel, the honeycomb tube two 22 forms a turning flow channel, and the third-stage sound attenuation cavity forms a blowing flow channel. After the air entering from the air inlet 11 enters the first-stage sound attenuation cavity 60, the air passes through the air inlet flow channel, the turning flow channel and the blowing flow channel, and is blown by the motor body 3 to the fifth-stage sound attenuation cavity 80, and then enters the humidification tank 9 of the breathing machine.

[0067] The air inlet 11 is fixedly provided with an air inlet pipe 111 extending into the first-stage sound attenuation cavity 60. The air inlet 11 communicates with the first-stage sound attenuation cavity 60 through the air inlet pipe 111. The inner opening of the air inlet pipe 111 is located at the starting end of the air flow path in the air inlet flow channel.

[0068] The motor body 3 is provided with an air inlet 31 and an air outlet 32. The air inlet 31 of the motor body 3 is located in the second-stage sound attenuation cavity 70 and at the ending end of the air flow path in the air outlet flow channel. The air outlet 32 of the motor body 3 is located in front of the fifth-stage sound attenuation cavity 80.

[0069] Referring to Figure 3 and Figure 13 , the water tank 9 comprises a water tank air flow pipeline part 91, a water tank water storage part 92, a sealing ring 93 and a sealing sleeve 931.

[0070] The water tank air flow pipeline part 91 and the water tank water storage part 92 are buckled together. The sealing ring 93 is detachably arranged between the water tank air flow pipeline part 91 and the water tank water storage part 92.

[0071] The sealing sleeve 931 is fixedly arranged on the water tank air flow pipeline part 91. The sealing sleeve 931 is connected with the fairing 35.

[0072] The water tank air flow pipeline part 91 is provided with a humidification cavity 911.

[0073] In this technical solution, the internal air flow path and structure design of the breathing machine fully considers the smoothness of air flow, sound attenuation effect and system efficiency. Not only does it provide a more comfortable and safe treatment environment for patients, but also improves the overall performance and reliability of the breathing machine.

[0074] Now the detailed implementation fully optimizes the design of the breathing machine, especially optimizes and improves multiple places of the air path module of the breathing machine to further achieve the purpose of the present practical new type, including:

[0075] 1. The first-stage sound attenuation cavity 60 is jointly formed by the bottom shell 1 and the partition plate 2. The excess gap part in the original bottom shell 1 is utilized, so that the air coming from the air inlet 11 can enter the second-stage sound attenuation cavity 70 through the honeycomb pipe one 23 after passing through the air inlet flow channel. In addition to the characteristic of reducing the occupied space, it also has the characteristics of optimizing the air path, making the air flow smoother and the noise lower.

[0076] 2. The overall structure of the honeycomb pipe two 22 is on the partition plate 2 and located in the second-stage sound attenuation cavity 70. The air entering the first-stage sound attenuation cavity 60 from the air inlet 11 enters the second-stage sound attenuation cavity 70 along the honeycomb pipe one 23, and enters the motor body 3 through the honeycomb pipe two 22 via the air outlet flow channel. The honeycomb pipe two 22 is not arranged on the outside or the peripheral side, and does not need to occupy the space outside the air path module. It is also an optimization of space.

[0077] 3. The first sampling port 41, the second sampling port 42 and the third sampling port 43 are provided on the upper cover 4. The three sampling ports are connected to the circuit board. The first sampling port 41 is directly connected to the first-level silencing chamber 60, the second sampling port 42 is directly connected to the second-level silencing chamber 70, and the third sampling port 43 is directly connected to the fifth-level silencing chamber 80. There is no need to specially set up additional airflow pipes to monitor the airflow in the air path module, which saves additional parts, pipes, and joints, saving space;

[0078] In particular, in the design of the detailed implementation method, from the analysis of the above three points, it can be seen that the implementation of each optimized and improved functional design is closely linked and interdependent, thereby making the overall structure of the ventilator more compact and reliable, reducing the overall parts of the ventilator, and making the structure ingenious and reasonable, simplifying the assembly, improving the assembly efficiency and assembly quality, thereby also improving the safety and reliability of the patient when using the ventilator. As a medical product, the ventilator can make the patient's use safer and more stable.

[0079] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilator comprising a partition (2), a bottom shell (1), a motor body (3), an upper cover (4), a circuit board (5), a fairing (35), a water tank (9) and a muffler; characterized in that: The bottom shell (1) is provided with an air inlet (11); the partition (2) is assembled on the bottom shell (1), the partition (2) is provided with a motor accommodating cavity (21), and a motor body (3) is installed in the motor accommodating cavity (21); a fairing (35) is detachably fixedly provided on the motor body (3); The upper cover (4) is detachably fixed on the partition (2); a honeycomb tube 1 (23) is provided on the partition (2), and a plurality of honeycomb tubes 2 (22) are provided on the partition (2); The circuit board (5) is detachably fixed to the upper cover (4); a digital differential pressure sensor sampling port and a pressure sensor sampling port are provided on the circuit board (5); The digital differential pressure sensor is connected to the sampling port of the differential pressure sensor with a silicone tube; the pressure sensor is connected to the sampling port of the pressure sensor with a silicone tube; The water tank (9) is assembled on the bottom shell (1); a muffler box is fixedly provided on the bottom shell (1); The muffler box includes a muffler box upper cover and a muffler box main body, both of which are provided with a card slot; the gas fairing is inserted into the card slot of the muffler box upper cover and the muffler box main body; A display screen fixing frame is fixedly provided on the bottom shell (1), and a display screen is clamped and provided on the display screen fixing frame; A first-level silencer cavity (60) and a second-level silencer cavity (70) are formed between the partition (2) and the bottom shell (1); the first-level silencer cavity (60) is formed between the air inlet (11) and the honeycomb tube first air outlet B; the second-level silencer cavity (70) is formed between the honeycomb tube first air outlet B and the honeycomb tube second air outlet C; the third-level silencer cavity is formed between the honeycomb tube second air outlet C and the motor air intake cavity air inlet D; the fourth-level silencer cavity is formed between the motor air intake cavity air inlet D and the fairing air inlet E; the fifth-level silencer cavity (80) is formed between the fairing air inlet E and the silencer box air outlet F; and the humidification cavity is formed between the silencer box air outlet F and the patient connection port in the water tank (9).

2. The ventilator according to claim 1, wherein: The lower cover of the silencer box is integrated into the bottom shell of the ventilator; the display screen is fixed with the help of the silencer box.

3. The ventilator according to claim 1, wherein: The upper cover (4) is provided with a first sampling port (41), a second sampling port (42) and a third sampling port (43); a first-level silencing chamber (60) is connected to the first sampling port (41); a second-level silencing chamber (70) is connected to the second sampling port (42); and a fifth-level silencing chamber (80) is connected to the third sampling port (43); monitoring sensors (51) are provided on the circuit board (5) of the ventilator at locations corresponding to the first sampling port (41), the second sampling port (42) and the third sampling port (43); the sampling ports on the digital differential pressure sensor and the pressure sensor on the circuit board (5) are connected to the sampling port on the silencing box via a silicone tube with the shortest distance.

4. The ventilator according to claim 1, wherein: A motor silicone sleeve (33) and a motor protective cover (34) are provided in the motor accommodating cavity (21) of the partition (2); the motor silicone sleeve (33) and the motor protective cover (34) constitute an elastic bracket for mounting the motor body (3) to elastically limit the motor body (3).

5. The ventilator according to claim 2, wherein: The air outlet of the fairing (35) and the air inlet of the water tank (9) are sealed and connected by a silicone sleeve.

6. The ventilator according to claim 1, characterized in that: The motor body (3) is provided with an air inlet (31) and an air outlet (32); the air inlet (31) of the motor body (3) is located in the secondary silencer cavity (70) and at the end of the air flow path in the blast flow channel; the air outlet (32) of the motor body (3) is located in front of the fifth silencer cavity (80).

7. The ventilator according to claim 1, characterized in that: The water tank (9) comprises a water tank airflow conduit portion (91), a water tank water storage portion (92), a sealing ring (93) and a sealing sleeve (931); the water tank airflow conduit portion (91) and the water tank water storage portion (92) are buckled together, and a sealing ring (93) is provided between the water tank airflow conduit portion (91) and the water tank water storage portion (92); a sealing sleeve (931) is fixedly provided on the water tank airflow conduit portion (91); the sealing sleeve (931) is connected to the fairing (35); and a humidification chamber (911) is provided in the water tank airflow conduit portion (91).

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