CN108310563A - A kind of lung ventilator - Google Patents

Abstract

A ventilator, including a host and a humidification device; the host includes a casing and an air circuit module in the casing, the air outlet of the air circuit module communicates with the air inlet of the humidification device; the air circuit module and the casing The space is positioned through at least one flexible connection structure, and at least one position-limiting structure is provided between the air path module and the housing; the main engine also includes an air passage transfer device, including an air inlet and an air outlet, and the air passage between the two is not connected. Coaxial setting; the air inlet is connected to the air outlet of the air circuit module, and the air outlet is connected to the air inlet of the humidification device; the air inlet of the air circuit module is connected to an opening on the shell through a flexible buffer tube and communicated with the air path , the air outlet of the air circuit module is sealed and connected with the air inlet of the air channel adapter through another flexible buffer tube and communicated with the air channel.

Description

a ventilator

technical field

The invention relates to the field of medical equipment, in particular to a ventilator.

Background technique

As an effective means of artificially replacing the spontaneous ventilation function, the ventilator has been widely used in respiratory failure caused by various reasons, anesthesia breathing management during major surgery, respiratory support treatment and emergency resuscitation, and occupies an important position in the field of modern medicine. It is a very important medical device that can prevent and treat respiratory failure, reduce complications, save and prolong the life of patients.

Its working principle is to detect the signal of the patient's airway obstruction through the controller, properly pressurize the air in the airway of the ventilator, and then forcefully open the patient's airway occlusion, provide continuous ventilation for the patient, and keep the patient's body to obtain enough oxygen. .

At present, the main components of ventilators on the market are divided into two parts: the main unit and the humidification device. When the ventilator is working, the air is pumped into the humidification device through the motor in the main engine, and then sent to the user's respiratory tract after being humidified by the humidification device. As the air flows through the humidification device, it will carry water vapor to form humid air, and the air with appropriate humidity will enter the patient's airway without causing damage to the fragile respiratory airway and airway mucosa, thus improving the user's use Experience has played a beneficial auxiliary effect on the user's disease treatment.

The existing ventilator has the following disadvantages: 1. The air circuit module of the main part of the ventilator is fixed on the base by hard connection, which vibrates greatly during operation, and the connection structure is easy to be damaged, especially when the transportation is subjected to external impact; 2. The air outlet of the air path module is directly connected to the air inlet of the humidification device, which is prone to noise and has high requirements on the structure of the humidification device.

Therefore, how to solve the above-mentioned deficiencies in the prior art becomes the subject to be studied and solved by the present invention.

Contents of the invention

The object of the present invention is to provide a ventilator.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A ventilator, comprising a main body part and a humidification device part assembled on the main body; the main body includes a housing and an air circuit module positioned in the housing, an air outlet of the air circuit module and the air circuit module An air inlet air path of the humidification device is connected; wherein:

The air circuit module and the housing are positioned through at least one flexible connection structure; and at least one position-limiting structure is also provided between the air circuit module and the housing;

The main engine also includes an airway adapter device, the airway adapter device includes an air inlet and an air outlet, and the two are communicated through an airflow channel;

The air inlet is connected to the air outlet of the air path module, the air outlet is connected to the air inlet of the humidification device, and the air inlet and the air outlet are arranged non-coaxially;

The air inlet of the air path module is connected to an opening on the housing through a flexible buffer tube and communicated with the air path, and the air outlet of the air path module is connected to the air channel adapter device through another flexible buffer tube The air inlet is sealed and connected with the gas path.

The relevant content in the above-mentioned technical scheme is explained as follows:

1. In the above scheme, through the setting of the flexible connection structure, on the one hand, when the blower in the air path module is in operation, its vibration will be absorbed through the flexible connection structure, and the vibration will not be transmitted to the housing, which has significant vibration reduction effect; on the other hand, the gas path module can be allowed to have a certain free displacement space, so as to avoid its hard contact with the shell, and thus avoid damage to the gas path module when the main engine is impacted by external force.

2. In the above solution, there are multiple flexible connection structures, and they are at least evenly distributed around the bottom of the air path module. In addition to the bottom, it can also be arranged on the side or top of the air path module, preferably at the bottom of the air path module. Further, the number of flexible connecting structures may be three or more, so as to form a stable flexible supporting surface.

When there is only one flexible connection structure, a stable connection relationship can be achieved by arranging the flexible connection structure to have a relatively large contact surface in contact with the air path module and to be connected and positioned.

3. In the above solution, the flexible connection structure is a flexible connection column or a flexible connection pad, or other structures with similar functions. The flexible connecting structure is made of known flexible materials, such as rubber, silica gel, sponge and so on.

4. In the above solution, the limiting structure includes a limiting ring arranged on the periphery of each flexible connection structure, and the limiting ring is in the shape of an arc or a semicircle or a circle, corresponding to each other and arranged in a circular shape. on the periphery of the flexible connection structure; the limit ring is fixed on the housing and fits with the flexible connection structure in a gap, which not only leaves a swing space for the flexible connection structure, but also provides a certain amount of vibration for the air circuit module. degrees of freedom, there is a maximum swing amplitude that can be used to limit the flexible connection structure in the horizontal direction.

5. In the above solution, the limiting structure includes a top limiting structure, which includes a top limiting seat and a top limiting column that abut against each other in the horizontal direction, or other structures that can be combined and abut against each other, The two are respectively fixed on the top of the air circuit module and the inner side of the housing.

Through the setting of the top limit structure, it can be used to assist in the upper limit of the air circuit module. With the flexible connection structure and the limit ring, the air circuit module can be limited in the front, rear, up, down, left, and right directions, which can Avoid damage to the air circuit module during transportation, avoid damage to other connection structures inside the host, and also have a drop buffering effect.

6. In the above scheme, one of the top limiting seat and the top limiting column is made of soft material, the other is made of hard material, or both are made of soft material, so that the air path module can be guaranteed to be It can have a certain displacement space, which is beneficial to vibration reduction, and at the same time can achieve a good limit effect.

When the top limit post is made of hard material, a buffer ring can also be set on the top limit post to further improve the vibration reduction effect, and at the same time prolong the service life of the top limit seat and the top limit post .

7. In the above solution, by setting the airway transfer device, the length of the airway in the ventilator main unit can be shortened, and the volume of the air circuit module can be reduced. The gas flow detection accuracy of the ventilator is improved.

8. In the above solution, the air inlet of the airway adapter is located at the air inlet end of the airflow passage, the air outlet of the airway adapter is located at the air outlet end of the airflow passage, and the width of the air outlet is larger than the air outlet. The width of the air inlet port (not to exceed 1.5 times). With this design, the outlet air flow can be stabilized.

9. In the above solution, the thickness of the airway transition device is greater than or equal to 10 mm. The upper limit of the thickness is determined by the size of the ventilator shell, but it should not be less than 10mm, otherwise the air circulation resistance will be too large, and no space can be reserved for the sound-absorbing structure to be installed in the future.

10. In the above scheme, through the setting of the air passage transfer device, once the water in the humidification device backflows, it will first enter the air passage conversion device, which will affect the blower in the air passage module to a certain extent. to the protective effect.

11. In the above solution, the air inlet of the air path module is connected to an opening on the housing through a flexible buffer tube and communicated with the air path, and the air outlet of the air path module is connected to the air outlet through another flexible buffer tube. The air inlet of the channel adapter device is sealed and connected with the gas path. The design of the two flexible buffer tubes cooperates with the flexible connection structure to further enhance the vibration damping effect.

The flexible buffer tube may be made of flexible materials such as silica gel and rubber.

12. In the above solution, an opening is provided on the housing corresponding to the air inlet of the air circuit module, and a cover plate is connected to the opening, and the cover plate closes or opens the opening, and the cover plate Several ventilation holes are provided. When the cover plate closes the opening, it can play a waterproof role without affecting the flow of air into the air path module.

Further, the cover plate is detachable for cleaning;

In addition, there is an assembly space between the cover plate and the opening, which can be used to assemble air filter structures, such as filter screens, filter pads, and the like.

13. In the above solution, the cover plate is connected to the opening through a rotating shaft, and is rotatably opened and closed relative to the opening, so it is not easy to fall off, and is combined with the opening through a buckle structure.

14. In the above solution, the housing includes a front cover and a rear cover, at least one of which is bent; the front cover or the rear cover is opposite to the other with its inner concave surface, and the front cover or the rear cover is opposite to the other. The casing and the rear casing are rotatably connected through a rotatable connection structure, and have two states of open and closed; the rotation axes of the two are arranged along the horizontal direction.

15. In the above solution, the front cover or the rear cover is bent; the housing also includes a bottom plate, the front end of the bottom plate is connected and positioned with the lower end of the front cover, and the rear end of the bottom plate is connected to the lower end of the front cover. The lower end of the rear cover is connected and positioned; an assembly space is defined between the three for assembly of components such as air circuit modules.

16. In the above solution, both the front cover and the rear cover are bent, and the two are assembled with their inner concave surfaces facing each other, and the assembly space is defined between them.

17. In the above solution, the rotating connection structure includes a hook and a slot, which are respectively arranged in alignment at the joint of the front cover and the rear cover. When the front cover and the rear cover are opened, the hook is free to rotate in the slot; when the front cover and the rear cover are closed, the hook is locked with the slot.

18. In the above solution, a gas flow detection device of a ventilator is provided corresponding to a sensor module of the ventilator; the flow detection device includes an air flow channel, which is opened in the main body of the ventilator, and the air flow The cross-sectional shape of the channel is rectangular;

The air flow channel is provided with at least two detection holes, one front and one rear, along its length direction; the two detection holes are both gas-path connected to the sensor module;

Wherein, it also includes a flow air resistance module, the flow air resistance module is positioned in the air flow channel, and is located between the two detection holes; the cross-sectional shape of the flow air resistance module is rectangular, and Corresponding cross-sectional shapes, and several air circulation holes;

The center of the cross-section of the flow air resistance module is provided with a rectangular central flow channel along the length direction of the cross-section, and at least one air circulation hole is provided in the rectangular central flow channel;

Wherein, the four end points of the rectangular cross-section of the flow air resistance module are respectively connected to the four end points of the rectangular central channel through a first connecting rib, forming four first connecting ribs radially connecting the flow air resistance module The cross section is divided into four ventilation areas, and each of the ventilation areas is provided with at least one air circulation hole.

19. In the above solution, the cross-sectional shape of the flow air resistance module matches the cross-sectional shape of the air flow channel, and the peripheral wall constituting the flow air resistance module is attached to the inner wall of the air flow channel.

20. In the above solution, "the four first connecting ribs radially divide the cross section of the flow air resistance module into four ventilation areas", so that each of the air circulation holes is radially formed on the cross section of the flow air resistance module Arrange evenly.

twenty one. In the above solution, the flow air resistance module can be placed in the airflow channel separately, or integrally formed in the airflow channel.

twenty two. In the above scheme, the number of the air circulation holes in each ventilation area and the rectangular central flow channel is an odd number or a prime number, preferably a prime number, and the air circulation holes in each ventilation area are parallel Set to eliminate resonance and overcome the problem of unstable detection waveform caused by resonance.

twenty three. In the above solution, two second connecting ribs are also included, and each second connecting rib is arranged parallel to the short side of the cross-section of the flow air resistance module, and arranged on both sides of the width direction of the rectangular central flow channel; the second connecting ribs The connecting rib divides the two ventilation areas on both sides of the rectangular central channel in the lengthwise direction into two sub-areas. The areas constituting the four sub-regions are the same or similar to the areas of the two ventilation regions on both sides of the rectangular central flow channel in the length direction, so as to ensure the uniform air velocity and reduce the turbulent phenomenon generated by the airflow at high velocity.

twenty four. In the above scheme, the airflow entering the airflow channel passes through the flow air resistance module, and a pressure drop is generated between the upstream detection hole and the downstream detection hole; when the air flow enters the flow air resistance module, the fluid The speed is relatively accelerated, which helps to generate a larger signal for the control system to judge when the air in the airflow channel is at a low flow rate, that is, the signal resolution under low flow conditions can be improved.

25． In the above scheme, through the setting of the flow air resistance module, it not only serves the purpose of generating pressure difference and serving the detection of air flow, but also through the special design of each ventilation area, the flow air resistance module can also be used for rectification at the same time, which will pass The airflow is combed to make it appear as a smoother laminar flow structure.

26． In the above solution, the host is also equipped with a control circuit module, which controls the speed of the blower through the air flow detected by the sensor module to change the air outlet pressure of the host. In addition to the control circuit module, the host also includes such as a power supply module, display module and other components.

Working principle of the present invention and advantage are as follows:

The ventilator of the present invention includes a host and a humidification device; the host includes a casing and an air path module in the casing, the air outlet of the air path module communicates with the air inlet of the humidification device; the air path module and the air path module The shells are positioned through at least one flexible connection structure, and at least one position-limiting structure is provided between the air path module and the shell; the main engine also includes an air passage adapter, including an air inlet and an air outlet, and the air passage between the two The connection is non-coaxial; the air inlet is connected to the air outlet of the air circuit module, and the air outlet is connected to the air inlet of the humidification device; the air inlet of the air circuit module is connected to an opening on the housing through a flexible buffer tube and air The air outlet of the air circuit module is sealed and connected with the air inlet of the air channel adapter through another flexible buffer tube and communicated with the air channel.

Compared with the prior art, the gas circuit module of the present invention is flexibly connected to the housing, which can eliminate the vibration generated during work, has a significant vibration reduction effect, and can avoid damage to components; and provides a certain degree of freedom for the gas circuit module Displacement space to avoid hard contact with the shell, avoiding damage to the air circuit module when external force impacts. By setting the airway transfer device, on the one hand, the noise is eliminated, and at the same time, the volume of the airway module is reduced, the impedance of the airway is reduced, and the gas flow detection accuracy of the ventilator can be improved.

Description of drawings

Accompanying drawing 1 is the appearance schematic diagram of the embodiment of the present invention;

Accompanying drawing 2 is the exploded diagram of the decomposition of the embodiment of the present invention;

Accompanying drawing 3 is the internal structure schematic diagram of the embodiment of the present invention after removing the front and rear covers;

Figure 4 is a schematic diagram of the internal structure of the embodiment of the present invention after removing the gas circuit module and the air channel adapter device;

Accompanying drawing 5 is the structural diagram of the top limit structure of the embodiment of the present invention.

Accompanying drawing 6 is a schematic diagram of the cross-sectional structure of A-A in Fig. 5;

Accompanying drawing 7 is the structural schematic diagram of the air circuit module of the embodiment of the present invention;

Accompanying drawing 8 is the structure diagram of the airway transition device of the embodiment of the present invention;

Accompanying drawing 9 is the schematic cross-sectional structure diagram of the main engine of the embodiment of the present invention;

Accompanying drawing 10 is the structure diagram when the front cover and the rear cover of the embodiment of the present invention are closed;

Accompanying drawing 11 is the structural representation when the front cover and the rear cover of the embodiment of the present invention are opened;

Accompanying drawing 12 is the structural representation of one side plate of the embodiment of the present invention;

Accompanying drawing 13 is the structural schematic diagram of Fig. 12;

Accompanying drawing 14 is the structural schematic diagram of the gas flow detection device of the embodiment of the present invention;

Accompanying drawing 15 is the cross-sectional schematic diagram of the gas flow detection device of the embodiment of the present invention;

Accompanying drawing 16 is the structural schematic diagram of partial section section of the gas flow detection device of the embodiment of the present invention.

In the attached drawings above: 1. Host; 2. Humidification device; 3. Shell; 4. Air path module; 5. 6. The air inlet of the air path module; Air outlet of the air circuit module; 7. Air inlet of humidification device; 8. Flexible connection structure; 9. Limiting ring; 10. Top limit seat; 11. Top limit column; 12. Buffer ring; 13. Airway transfer device; 14. Air inlet; 15. 16. Air outlet; Airflow channel; 17. Air inlet port; 18. Air outlet port; 19. Flexible buffer tube; 20. open mouth; 21. Front cover; 22. 23. Back cover; top plate; 24. 25. front panel; Bottom plate; 26. hook; 27. card slot; 28. side panels; 29. Cover plate; 30. Ventilation holes; 31. 32. Airflow channel; 33. Detection hole; Flow air resistance module; 34. 35. Air circulation holes; 36. Rectangular central runner; 36. The first connecting rib; Ventilation area; 38. 39. The second connecting rib; subregion.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Embodiment: Referring to accompanying drawings 1 to 13, a ventilator includes a main unit 1 and a humidification device 2 mounted on the main unit 1; the main unit 1 includes a housing 3 and is positioned on the housing. An air path module 4 in 3, the air path module 4 has an air inlet 5, communicated with the outside atmosphere; an air outlet 6 of the air path module 4 is connected to an air inlet 7 of the humidification device 2 The air path module 4 is provided with a blower, and the blower sucks in air through the air inlet 5 and pumps it into the humidification device 2 through the air outlet 6 .

The air circuit module 4 and the housing 3 are positioned through at least one flexible connection structure 8; and at least one position-limiting structure is also provided between the air circuit module 4 and the housing 3;

Through the setting of the flexible connection structure 8, on the one hand, when the blower in the air path module 4 is in operation, its vibration will be absorbed by the flexible connection structure 8, and the vibration will not be transmitted to the housing 3, which has significant vibration reduction Effect; on the other hand, the gas path module 4 can be allowed to have a certain free displacement space, so as to avoid its hard contact with the shell 3, and then avoid damage to the gas path module 4 when the main engine 1 is impacted by external force.

Wherein, as shown in FIGS. 3 and 4 , there are three flexible connecting structures 8 , which are evenly distributed around the bottom of the air circuit module 4 . In addition to the bottom, it can also be arranged on the side or top of the air path module 4, preferably on the bottom of the air path module 4.

The flexible connection structure 8 is a flexible connection column, and may also be a flexible connection pad or other structures with similar functions. The flexible connection structure 8 is made of known flexible materials, such as rubber, silica gel, sponge and so on.

Wherein, the limiting structure includes a limiting ring 9 arranged around each of the flexible connecting structures 8, and the limiting ring 9 is arc-shaped (or semicircular or circular), corresponding to each other and It is arranged around the periphery of the flexible connection structure 8 in a circular shape; the limit ring 9 is fixed on the housing 3 and fits with the flexible connection structure 8 in a gap, leaving a swing space for the flexible connection structure 8, A certain degree of freedom is provided for the vibration of the gas path module 4, which can be used to limit the maximum swing amplitude of the flexible connecting structure 8 in the horizontal direction.

Wherein, as shown in Figures 5 and 6, the limiting structure also includes a top limiting structure, which includes a top limiting seat 10 and a top limiting column 11 that abut against and cooperate in the horizontal direction, or other combinations And against the matching structure, the two are respectively fixed on the top of the air path module 4 and the inner side of the housing 3 .

Through the setting of the top limit structure, it can be used to assist in the upper limit of the air circuit module 4, and cooperate with the flexible connection structure 8 and the limit ring 9 to realize the control of the air circuit module 4 in the front, rear, up, down, left, and right directions. The position limit can avoid damage to the air circuit module 4 during transportation, can avoid damage to other connection structures inside the host 1, and also has a drop buffering effect.

Wherein, one of the top limiting seat 10 and the top limiting column 11 is made of soft material, the other is made of hard material, or both are made of soft material, so that the air path module 4 can be guaranteed It can not only have a certain displacement space, which is beneficial to vibration reduction, but also can achieve a good position limiting effect.

When the top limit post 11 is made of hard material, a buffer ring 12 can also be sleeved on the top limit post 11 to further enhance the vibration damping effect, and at the same time extend the top limit seat 10 and the top limit The service life of column 11.

As shown in FIG. 8 , the main engine 1 also includes an airway adapter device 13 , the airway adapter device 13 includes an air inlet 14 and an air outlet 15 , and the two are communicated through an airflow channel 16 ;

The air inlet 14 is connected to the air outlet 6 of the air circuit module 4 , the air outlet 15 is connected to the air inlet 7 of the humidification device 2 , and the air inlet 14 is not connected to the air outlet 15 coaxial setting.

By setting the airway adapter device 13, the length of the airway in the main machine 1 can be shortened, the volume of the airway module 4 can be reduced, and at the same time, the airway can be connected in a short distance to reduce the impedance of the airway and improve the ventilation efficiency of the ventilator. Gas flow detection accuracy.

The air inlet 14 of the airway conversion device 13 is located at the air inlet end 17 of the air passage 16, the air outlet 15 of the air passage conversion device 13 is located at the air outlet end 18 of the air passage 16, and the air outlet The width of end 18 is greater (not more than 1.5 times) than the width of said air inlet end 17 . With this design, the outlet air flow can be stabilized.

Wherein, the thickness of the airway transition device 13 is greater than or equal to 10 mm. The upper limit of the thickness is determined by the size of the ventilator housing 3, but it should not be less than 10 mm, otherwise the air circulation resistance will be too large, and no space can be reserved for the sound-absorbing structure to be arranged in the future.

Wherein, as shown in FIG. 9 , the air inlet 5 of the air path module 4 is connected to an opening 20 on the housing 3 through a flexible buffer tube 19 and communicated with the air path, and the air outlet of the air path module 4 6 is airtightly connected with the air inlet 14 of the airway transition device 13 through another flexible buffer tube 19 and is in air communication. The design of the two flexible buffer tubes 19 cooperates with the flexible connection structure 8 to further enhance the vibration damping effect. The flexible buffer tube 19 can be made of flexible materials such as silica gel and rubber.

Wherein, as shown in Figures 10 and 11, the housing 3 includes a front cover 21 and a rear cover 22, and the front cover 21 is bent to form a top plate 23 and a front panel 24 at the same time; 3. It also includes a bottom plate 25, the front end of the bottom plate 25 is snap-connected and positioned with the lower end of the front cover 21, and the rear end of the bottom plate 25 is connected and positioned with the lower end of the rear cover 22; An assembly space is used for assembling components such as the air circuit module 4 and the like.

The rear end of the front cover 21 is rotatably connected to the upper end of the rear cover 22 through a rotating connection structure, so that the front cover 21 can have two states of opening and closing relative to the rear cover 22 in the up and down direction; The rotation axis is arranged along the horizontal direction.

The rotation connection structure includes a hook 26 and a slot 27 , which are respectively arranged at the junction of the front cover 21 and the rear cover 22 in opposite positions. When the front cover 21 and the rear cover 22 are opened, the hook 26 rotates freely in the slot 27; when the front cover 21 and the rear cover 22 are closed, the hook 26 and the hook Slot 27 is locked.

Wherein, as shown in Figures 12 and 13, the housing 3 also includes a side plate 28, on which the opening 20 is provided corresponding to the air inlet 5 of the air path module 4, and on the opening 20 A cover plate 29 is connected to close or open the opening 20 , and several ventilation holes 30 are arranged on the cover plate 29 . When the cover plate 29 closes the opening 20 , it can play a waterproof role without affecting the flow of air into the air path module 4 .

Furthermore, the cover plate 29 is detachable for cleaning; in addition, there is an assembly space between the cover plate 29 and the opening 20, which can be used for assembling air filter structures, such as filter nets and filter mats.

Wherein, the cover plate 29 is connected to the opening 20 through a rotating shaft, and is rotatably opened and closed relative to the opening 20 , so it is not easy to fall off, and is combined with the opening 20 through a buckle structure.

As shown in Figures 14 to 16, it also includes a gas flow detection device, which is set corresponding to a sensor module of the ventilator; In the air path module 4, it corresponds to the air inlet 5 of the air path module 4, and the cross-sectional shape of the air flow channel 31 is rectangular.

The air flow channel 31 is provided with a front and a rear two detection holes 32 along its length direction; the two detection holes 32 are connected to the sensor module through an air path; the front detection hole 2 is located upstream of the air flow in the direction of the air flow , the rear detection hole 2 is located downstream of the airflow.

Wherein, a flow air resistance module 33 is also included, the flow air resistance module 33 is positioned in the air flow channel 31 and between the two detection holes 32; the flow air resistance module 33 is detachably placed on the The airflow channel 31 can also be integrally formed in the airflow channel 31 .

The cross-sectional shape of the flow air resistance module 33 is rectangular, corresponding to the cross-sectional shape of the air flow channel 31, and several air circulation holes 34 are provided; the surrounding wall of the flow air resistance module 33 is attached to the air flow channel 31 inner walls.

The airflow entering the airflow channel 31 passes through the flow air resistance module 33, and a pressure drop is generated between the upstream detection hole 32 and the downstream detection hole 32; when the air flow enters the flow air resistance module 33, its air flow The speed is relatively accelerated, which helps to generate a larger signal for the control system to judge when the air in the airflow channel 31 is at a low flow rate, that is, the signal resolution at a low flow rate can be improved.

Wherein, as shown in FIG. 15 , the center of the cross section of the flow air resistance module 33 is horizontally opened with a rectangular center flow channel 35 along the length direction of the cross section (if the vertical direction of the cross section is the length direction, the rectangular center flow channel 35 The channel 35 is vertically opened), and at least one air circulation hole 34 is provided in the rectangular central channel 35 .

The four endpoints of the rectangular cross-section of the flow air resistance module 33 are respectively connected to the four end points of the rectangular central flow channel 35 through a first connecting rib 36, forming four first connecting ribs 36 to radially block the flow air. The cross section of the module 33 is divided into four ventilation areas 37, and each of the ventilation areas 37 is provided with at least one air circulation hole 34; The cross-section is arranged radially and evenly.

The number of the air circulation holes 34 in each of the ventilation areas 37 and the rectangular central flow channel 35 is an odd number or a prime number, preferably a prime number, and each air circulation hole in each ventilation area 37 34 parallel settings to eliminate resonance and overcome the instability of the detection waveform caused by resonance.

Among them, it also includes two second connecting ribs 38, and each second connecting rib 38 is arranged parallel to the short side of the cross-section of the flow air resistance module 33, and is arranged on both sides of the width direction of the rectangular central flow channel 35; The second connecting rib 38 divides the two ventilation areas 37 on both sides of the rectangular central channel 35 in the longitudinal direction into two sub-areas 39 . The area constituting the four sub-regions 39 is the same as or similar to the area of the two ventilation regions 37 on both sides of the rectangular central flow channel 35 in the length direction, so as to ensure the uniformity of the air flow rate and reduce the generation of the air flow at a high flow rate. turbulence phenomenon.

Through the setting of the flow air resistance module 33, not only the air flow pressure difference is generated to facilitate the detection of air flow, but also through the special design of each ventilation area 37, the flow air resistance module 33 can also be used for rectification at the same time. The airflow is combed to make it appear as a smoother laminar flow structure.

Wherein, the host 1 is also provided with a control circuit module (not shown in the figure), through which the air flow detected by the sensor module is used to control the speed of the blower to change the air outlet pressure of the host 1. In addition to the control circuit module, In addition, the host 1 also includes other components such as a power supply module and a display module.

Compared with the prior art, the gas circuit module of the present invention is flexibly connected to the housing, which can eliminate the vibration generated during work, has a significant vibration reduction effect, and can avoid damage to components; and provides a certain degree of freedom for the gas circuit module Displacement space to avoid hard contact with the shell, avoiding damage to the air circuit module when external force impacts. By setting the airway transfer device, on the one hand, the noise is eliminated, and at the same time, the volume of the airway module is reduced, the impedance of the airway is reduced, and the gas flow detection accuracy of the ventilator can be improved.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. a kind of lung ventilator, including host machine part and the humidification device part that is assemblied on the host；The host includes one Shell and the gas circuit module being positioned in the shell, an air outlet slit of the gas circuit module are empty with the one of the humidification device Gas entrance gas circuit communicates；It is characterized in that：

It is positioned by least one flexible connecting structure between the gas circuit module and the shell；Also, in the gas circuit module An at least position limiting structure is additionally provided between the shell；

The host further includes an air flue switching device, which includes an air intake and a gas outlet, the two It is connected to by a gas channel gas circuit；

The air intake is plugged into the air outlet slit of the gas circuit module, and the plug into air of the humidification device of the gas outlet enters Mouthful, and the air intake and the non-coaxial setting in the gas outlet；

The air intake of the gas circuit module is connected to by a flexible buffer pipe with the opening connection on the shell and gas circuit, The air outlet slit of gas circuit module is tightly connected by the air intake of another flexible buffer pipe and the air flue switching device and gas circuit Connection.

2. lung ventilator according to claim 1, it is characterised in that：The flexible connecting structure is equipped with multiple and at least equal It is distributed in the bottom surrounding of the gas circuit module.

3. lung ventilator according to claim 1, it is characterised in that：The position limiting structure includes that setting connects in each flexibility The spacing ring of binding structure circumference, the spacing ring are fixedly arranged on shell, and with the flexible connecting structure clearance fit.

4. lung ventilator according to claim 1, it is characterised in that：The position limiting structure includes a upper limit structure, should Upper limit structure includes that the upper limit seat against cooperation and upper limit column, the two are fixedly arranged on described respectively in the horizontal direction The top of gas circuit module and the inside of the shell.

5. lung ventilator according to claim 1, it is characterised in that：The air that the air intake is located at the gas channel enters Mouth end, the gas outlet is located at the air outlet slit end of the gas channel, and the width at the air outlet slit end is more than described The width of air inlet end.

6. lung ventilator according to claim 1, it is characterised in that：The shell includes front cover shell and rear casing, and the two is extremely Few one is that bending is arranged；The front cover shell or the rear casing are opposite with another one with its inner concave, and front cover shell is with after Case is rotatablely connected by a rotation connection structure, is had and is opened and closed two states；The rotation axis of the two is in the horizontal direction Setting.

7. lung ventilator according to claim 6, it is characterised in that：The front cover shell or the rear casing are that bending is arranged； The shell further includes a bottom plate, and the front end of the bottom plate connect positioning, the rear end of bottom plate and institute with the lower end of the front cover shell State the lower end connection positioning of rear casing；It defines to form an assembly space between three.

8. lung ventilator according to claim 6, it is characterised in that：The front cover shell is that bending is set with the rear casing It sets, the two is mutually assembled so that its inner concave is opposite, defines to form an assembly space between the two.

9. lung ventilator according to claim 6, it is characterised in that：The rotation connection structure includes grab and card slot, and two Person aligns the junction for being set to the front cover shell and the rear casing respectively.

10. lung ventilator according to claim 1, it is characterised in that：Further include a detection of gas flow rate device, including a gas Circulation road, the gas channel are opened in the host of the lung ventilator, and its cross-sectional shape is rectangular；On the gas channel It is provided along its length one in front and one in back at least two detection holes；Further include a flow vapour lock module, flow vapour lock module positioning In the gas channel, and between two detection holes；The cross-sectional shape of flow vapour lock module is rectangular, and described The cross-sectional shape of gas channel is corresponding, and offers several air-through holes；The cross-section center edge of flow vapour lock module The length direction of the cross section offers a rectangular centre runner, and at least one air circulation is equipped in the rectangular centre runner Hole；

Wherein, four endpoints of the flow vapour lock module rectangular cross section are respectively by one first connection rib and the rectangle Four endpoints of heart runner connect, and constitute four first connection ribs and are divided into four at the radial cross section by flow vapour lock module A ventilation zone, and an at least air-through holes are equipped in each ventilation zone.