Airway module and ventilator

Abstract

The present invention discloses an air circuit module and a ventilator. The air circuit module includes a shell, a bracket, an oxygen introduction device and an exhaust fan; the bracket is arranged in the shell, and the bracket and the shell together enclose an air channel, a mixing chamber and an exhaust channel; the mixing chamber has an inlet and an outlet that are interconnected, one end of the air channel is connected to the inlet, and the air channel includes at least two curved channels; one end of the exhaust channel is connected to the outlet, and the other end is connected to the outside of the shell; the oxygen introduction device is connected to the bracket and connected to the inlet; the exhaust fan is arranged in the mixing chamber. In the technical solution of the present invention, the air inhaled by the air channel and the oxygen introduced by the oxygen introduction device are fully mixed under the action of the exhaust fan in the mixing chamber, and then discharged from the exhaust channel. The at least two curved channels of the air channel make the length of the air channel longer, thereby reducing the noise.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilators, and in particular to an air circuit module and a ventilator using the air circuit module. Background Art

[0002] Ventilators are often used in the medical field. Ventilators need to fully mix oxygen and air. The mixing of oxygen and air requires a fan to mix the two. The fan in a traditional ventilator will produce a lot of noise when working, which will affect the patient's rest. Summary of the invention

[0003] The main purpose of the present invention is to provide an air circuit module, aiming to improve the problem of high noise of the ventilator.

[0004] To achieve the above-mentioned purpose, the air path module proposed in the present invention includes a shell, a bracket, an oxygen introduction device and an exhaust fan; the bracket is arranged in the shell, and the bracket and the shell together enclose an air channel, a mixing chamber and an exhaust channel; the mixing chamber has an intake port and an exhaust port that are connected to each other, one end of the air channel is connected to the intake port, and the air channel includes at least two curved channels; one end of the exhaust channel is connected to the exhaust port, and the other end is connected to the outside of the shell; the oxygen introduction device is connected to the bracket and connected to the intake port; the exhaust fan is arranged in the mixing chamber.

[0005] Optionally, the air channel also includes at least three sub-channels arranged in parallel in sequence, each of the sub-channels having a head end for inhaling gas and a tail end for exhausting gas, and the two ends of the curved channel are respectively connected to the tail end of one of the two adjacent sub-channels and the head end of the other one.

[0006] Optionally, at least four spaced baffles are protruding from one side of the bracket, and the surfaces of the at least four baffles are arranged in parallel; the sub-channel is formed between every two adjacent baffles.

[0007] Optionally, the shell includes an upper cover and a bottom plate; one side of the bracket and the upper cover are combined to form the air channel, the other opposite side of the bracket and the bottom plate are combined to form the mixing chamber, and the suction port passes through the opposite sides of the bracket.

[0008] Optionally, the exhaust channel includes a first exhaust channel and a second exhaust channel; one end of the first exhaust channel is connected to the exhaust port, and the first exhaust channel is arranged perpendicular to the exhaust direction of the exhaust port; one end of the second exhaust channel is connected to the other end of the first exhaust channel, the other end of the second exhaust channel extends to the outside of the bracket, and the extension direction of the other end of the second exhaust channel is opposite to the exhaust direction of the exhaust port.

[0009] Optionally, the gas circuit module further includes a heating and humidifying water tank, which includes an inlet end and an outlet end; the inlet end is connected to the other end of the second exhaust channel; and the outlet end is connected to the inlet end.

[0010] Optionally, the exhaust passage is provided with an oxygen concentration sensor; and / or, the exhaust passage is provided with an oxygen flow sensor.

[0011] Optionally, the oxygen concentration sensor has an intake branch pipe and an exhaust branch pipe which are interconnected, and a partition plate is provided in the exhaust channel, and the partition plate divides the exhaust channel into an adjacent section close to the exhaust port and a distant section away from the exhaust port, and the intake branch pipe and the exhaust branch pipe are connected to the adjacent section and the distant section respectively.

[0012] Optionally, a muffler is provided at the end of the oxygen introduction device.

[0013] The present invention also provides a ventilator, comprising the above-mentioned air circuit module.

[0014] The technical solution of the present invention connects the air channel and the oxygen introduction device to the suction port of the mixing chamber, and the exhaust fan is arranged in the mixing chamber. Then, under the action of the exhaust fan, air and oxygen enter the mixing chamber from the suction port and are fully mixed; the exhaust port of the mixing chamber is connected to the exhaust channel, so that the mixed gas in the mixing chamber is discharged outside the shell through the exhaust channel for the patient to inhale. Furthermore, the air channel has at least two curved channels, which makes the length of the air channel longer, thereby reducing the sound of the exhaust fan from the end of the air channel away from the suction port during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the assembly structure of a ventilator according to an embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the explosion structure of the ventilator of the present invention;

[0018] Figure 3 It is a schematic diagram of the assembly structure of the gas path module of the present invention;

[0019] Figure 4This is a schematic diagram of the explosion structure of the gas path module of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the gas path module of the present invention from a first perspective;

[0021] Figure 6 A schematic diagram of the structure of the gas path module of the present invention from a second viewing angle;

[0022] Figure 7 A schematic diagram of the structure of the gas path module of the present invention from a third perspective;

[0023] Figure 8 It is a schematic structural diagram of the gas path module of the present invention from a fourth perspective.

[0024] Description of Figure Numbers:

[0025]

[0026]

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides a gas circuit module 1 .

[0032] In the embodiments of the present invention, please refer to Figures 1 to 5 The air path module 1 includes a shell 100, a bracket 200, an oxygen introduction device 300 and an exhaust fan 400; the bracket 200 is arranged in the shell 100, and the bracket 200 and the shell 100 together enclose an air channel 201, a mixing chamber 202 and an exhaust channel 203; the mixing chamber 202 has an inlet 2021 and an outlet 2022 that are interconnected, one end of the air channel 201 is connected to the inlet 2021, and the air channel 201 includes at least two curved channels 2012; one end of the exhaust channel 203 is connected to the outlet 2022, and the other end is connected to the outside of the shell 100; the oxygen introduction device 300 is connected to the bracket 200 and connected to the inlet 2021; the exhaust fan 400 is arranged in the mixing chamber 202.

[0033] The air circuit module 1 is used in a ventilator. The air channel 201 and the oxygen introduction device 300 of the air circuit module 1 are both connected to the inlet 2021 of the mixing chamber 202. The mixing chamber 202 is provided with an exhaust fan 400, so that air and oxygen can be mixed in the mixing chamber 202, so that the mixed gas has a better oxygen concentration for the patient to inhale. One end of the exhaust channel 203 is connected to the exhaust port 2022, and the other end is connected to the outside of the housing 100. The mixed gas after the air and oxygen are fully mixed by the exhaust fan 400 is discharged into the exhaust channel 203 through the exhaust port 2022, and then discharged to the outside of the air circuit module 1 through the exhaust channel 203, so as to achieve the effect of inhalation by the patient. It can be understood that the air channel 201 includes at least two curved channels 2012, so that the air channel 201 in the technical solution of the present invention is longer than the straight air channel 201. On the one hand, due to the longer length of the air channel 201, the path of sound wave transmission is longer, so that the sound heard by the user is smaller; on the other hand, when the exhaust fan 400 is working, the noise sound waves generated by the exhaust fan 400 can be reflected by the side walls of the curved channel 2012 of the air channel 201 when passing through the longer air channel 201 and a part of the sound waves is offset, and then the sound transmitted from the end of the air channel 201 away from the suction port 2021 of the mixing chamber 202 is smaller, thereby achieving a better noise reduction effect.

[0034] Specifically, when the air channel 201 has at least two curved channels 2012, the shape of the air channel 201 may be S-shaped, W-shaped, wavy or other shapes. Further, in order to prevent the gas in the mixing chamber 202 from flowing back into the air channel 201, a one-way valve may be provided at one end of the air channel 201 that is connected to the suction port 2021 of the mixing chamber 202. The one-way valve only allows air to flow from the air channel 201 into the mixing chamber 202, but does not allow the gas in the mixing chamber 202 to flow back into the air channel 201. Alternatively, the air channel 201 may be arranged in a curved spiral, that is, the air channel 201 may be arranged in a spiral spiral, so that the air channel 201 is as long as possible in a limited space, thereby achieving a noise reduction effect.

[0035] The technical solution of the present invention connects the air passage 201 and the oxygen introduction device 300 to the suction port 2021 of the mixing chamber 202, and the exhaust fan 400 is arranged in the mixing chamber 202. Then, under the action of the exhaust fan 400, air and oxygen enter the mixing chamber 202 from the suction port 2021 and are fully mixed; the exhaust port 2022 of the mixing chamber 202 is connected to the exhaust passage 203, so that the mixed gas in the mixing chamber 202 is discharged from the housing 100 through the exhaust passage 203 for the patient to inhale. Furthermore, the air passage 201 has at least two curved passages 2012, which makes the length of the air passage 201 longer, thereby reducing the sound of the exhaust fan 400 from the end of the air passage 201 away from the suction port 2021 during operation.

[0036] Specifically, in this embodiment, please refer to Figures 4 to 6 The air channel 201 also includes at least three sub-channels 2011 arranged in parallel in sequence, each sub-channel 2011 has a head end for inhaling gas and a tail end for exhausting gas, and the two ends of the curved channel 2012 are respectively connected to the tail end of one of the two adjacent sub-channels 2011 and the head end of the other one.

[0037] By making the air channel 201 further include at least three sub-channels 2011 arranged in sequence and in parallel, the tail end of one of two adjacent sub-channels 2011 and the head end of the other of them are respectively connected to the two ends of the curved channel 2012, so that the at least three sub-channels 2011 can achieve the effect of end-to-end connection through the curved channel 2012, ensuring that the air flows through the at least three sub-channels 2011 in sequence when flowing in the air channel 201, thereby ensuring that the overall length of the air channel 201 is relatively long. In addition, by arranging at least three sub-channels 2011 in parallel, it is avoided that at least one of the sub-channels 2011 is skewed relative to the others and occupies a larger space of the bracket 200, affecting the installation of other components.

[0038] Specifically, the air channel 201 may include a first sub-channel, a second sub-channel and a third sub-channel which are sequentially arranged in parallel with each other, and the air channel 201 also includes a first curved channel and a second curved channel; the two opposite ends of the second sub-channel are respectively connected to one end of the first curved channel and one end of the second curved channel, the other end of the first curved channel is connected to one end of the first sub-channel, the other end of the second curved channel is connected to one end of the third sub-channel, and the other end of the third sub-channel is connected to the inlet 2021. It can be understood that the air enters from the other end of the first sub-channel, and enters the inlet 2021 of the mixing chamber 202 through the first curved channel, the second sub-channel, the second curved channel and the third sub-channel in sequence, and then is fully mixed with the oxygen entering the inlet 2021 in the mixing chamber 202. By arranging the first sub-channel, the second sub-channel and the third sub-channel in parallel in sequence, and connecting the first sub-channel and the second sub-channel at both ends of the second sub-channel through the first curved channel and the second curved channel respectively, so that the air channel 201 includes an S-shaped channel, the entire air channel 201 is extended as much as possible on the basis of occupying a smaller space of the smaller bracket 200, thereby making the volume of the air path module 1 smaller on the one hand, and making the air path module 1 have less noise on the other hand. Alternatively, the third sub-channel and the suction port 2021 of the mixing chamber 202 may be connected to the fourth sub-channel 2011 or the fifth sub-channel 2011, and the other end of the third sub-channel may be connected to the fourth sub-channel 2011 through the third curved channel 2012. By analogy, as long as more curved channels 2012 and sub-channels 2011 can be arranged on the bracket 200, the length of the air channel 201 can be extended, thereby achieving a better noise reduction effect.

[0039] Of course, in other embodiments, the first sub-channel, the second sub-channel and the third sub-channel may not be parallel to each other, and any two sub-channels 2011 may form a certain angle between each other.

[0040] Further, please refer to Figures 4 to 6 At least four baffles 210 are convexly disposed at intervals on one side of the bracket 200 , and the plate surfaces of the at least four baffles 210 are disposed in parallel; a sub-channel 2011 is formed between every two adjacent baffles 210 .

[0041] By forming a sub-channel 2011 between every two adjacent baffles 210, the air channel 201 can make full use of the space, and as many sub-channels 2011 as possible can be designed within a limited space to avoid idle areas between two adjacent sub-channels 2011 except for the baffles 210, thereby making the total length of the entire air channel 201 longer and achieving a better noise reduction effect.

[0042] Specifically, a first baffle 211, a second baffle 212, a third baffle 213 and a fourth baffle 214 are convexly provided on one side of the bracket 200, which are arranged in parallel in sequence; a first sub-channel is formed between the first baffle 210 and the second baffle 212; a second sub-channel is formed between the second baffle 212 and the third baffle 213; and a third sub-channel is formed between the third baffle 213 and the fourth baffle 214. Furthermore, in order to achieve the effect that the curved channel 2012 can connect the tail end of one of the two adjacent sub-channels 2011 and the head end of the other one, a first curved plate 220 and a second curved plate 230 may be protruded from one side of the bracket 200, the first curved plate 220 connects one end of the first baffle 211 and one end of the third baffle 213, the third baffle 213 connects one end of the first curved plate 220 and one end of the first baffle 211 connected to the first curved plate 220; the second curved plate 230 connects one end of the second baffle 212 and one end of the fourth baffle 214, the second baffle 212 connects one end of the second curved plate 230 and one end of the second curved plate 230 close to the fourth baffle 214, and the first curved plate 220 and the second curved plate 230 are respectively arranged at opposite ends of the second baffle 212, a gap is provided between the first curved plate 220 and the second baffle 212, and a gap is provided between the second curved plate 230 and the third baffle 213. With such arrangement, air can sequentially pass through the gap between the first baffle plate 211 and the second baffle plate 212, the gap between the second baffle plate 212 and the first curved plate 220, the gap between the second baffle plate 212 and the third baffle plate 213, the gap between the third baffle plate 213 and the second curved plate 230, and the gap between the third baffle plate 213 and the fourth baffle plate 214; thereby, the air passage 201 is curved and has a longer length, which has a better noise reduction effect.

[0043] Further, please refer to Figures 3 to 6 The shell 100 includes an upper cover 110 and a bottom plate 120; one side of the bracket 200 and the upper cover 110 are enclosed to form an air channel 201, and the other opposite side of the bracket 200 and the bottom plate 120 are enclosed to form a mixing chamber 202, and the suction port 2021 runs through the opposite sides of the bracket 200.

[0044] By enclosing one side of the bracket 200 and the upper cover 110 to form an air channel 201, and the other side of the bracket 200 and the bottom plate 120 to form a mixing chamber 202, the size of the air path module 1 in a single direction can be reduced to prevent the air path module 1 from being too long in a certain direction. By penetrating the opposite sides of the bracket 200 through the suction port 2021, the air channel 201 of the bracket 200 is connected to the mixing chamber 202 through the suction port 2021.

[0045] Furthermore, if Figure 7As shown, the exhaust channel 203 includes a first exhaust channel 2031 and a second exhaust channel 2032; one end of the first exhaust channel 2031 is connected to the exhaust port 2022, and the first exhaust channel 2031 and the exhaust direction of the exhaust port 2022 are arranged perpendicularly; one end of the second exhaust channel 2032 is connected to the other end of the first exhaust channel 2031, and the other end of the second exhaust channel 2032 extends to the outside of the bracket 200, and the extension direction of the other end of the second exhaust channel 2032 is opposite to the exhaust direction of the exhaust port 2022.

[0046] It can be understood that, by making the exhaust channel 203 include the first exhaust channel 2031 and the second exhaust channel 2032, the first exhaust channel 2031 is perpendicular to the exhaust direction of the exhaust port 2022, and the second exhaust channel 2032 is opposite to the exhaust direction of the exhaust port 2022, so that the exhaust channel 203 is also bent, so that the exhaust channel 203 is longer than the path directly extending to the outside of the gas circuit module 1 along the exhaust direction through the exhaust port 2022, so that the noise generated by the exhaust fan 400 when working has a better noise reduction effect after passing through the exhaust channel 203. In addition, by making the other end of the second exhaust channel 2032 extend in the opposite direction to the exhaust direction of the exhaust port 2022, the problem of the gas circuit module 1 being too large in the exhaust direction of the exhaust port 2022 is avoided, so that the size of the gas circuit module 1 in each direction is more uniform.

[0047] Further, please refer to Figure 1 and Figure 2 The gas circuit module 1 also includes a heating and humidifying water tank 500 , which includes an inlet end 510 and an outlet end 520 , wherein the inlet end 510 is connected to the other end of the second exhaust channel 2032 ; and the outlet end 520 is connected to the inlet end 510 .

[0048] By setting up a heating and humidifying water tank 500, and connecting the inlet end 510 of the heating and humidifying water tank 500 to the other end of the second exhaust channel 2032, the other gases mixed in the mixing chamber 202 are discharged to the inlet end 510 of the heating and humidifying water tank 500 through the exhaust channel 203, and then enter the heating and humidifying water tank 500 to be heated and humidified to the appropriate temperature and humidity required by the patient, and finally discharged from the outlet end 520, so that the patient can inhale gas with a more appropriate temperature and humidity.

[0049] Furthermore, if Figure 6 As shown, the exhaust passage 203 is provided with an oxygen concentration sensor 600 .

[0050] By providing an oxygen concentration sensor 600 in the exhaust channel 203, the oxygen concentration sensor 600 can detect the oxygen concentration of the discharged mixed gas. When the oxygen concentration is too high or too low and does not meet the needs of the patient, the medical staff or other users can adjust the input concentration of oxygen by the oxygen input device in time. Specifically, the oxygen concentration sensor 600 can be provided on the first exhaust channel 2031 of the exhaust channel 203, or on the second exhaust channel 2032.

[0051] Further, please refer to Figure 7 and Figure 8 The exhaust passage 203 may also be provided with an oxygen flow sensor 700 .

[0052] By providing an oxygen flow sensor 700 in the exhaust channel 203, the oxygen flow sensor 700 can detect the oxygen flow of the discharged mixed gas. When the oxygen flow is too high or too low and does not meet the needs of the patient, medical staff or other users can timely adjust the input flow of oxygen by the oxygen input device. Specifically, the oxygen flow sensor 700 can be provided on the first exhaust channel 2031 of the exhaust channel 203, or on the second exhaust channel 2032. When both the oxygen concentration sensor 600 and the oxygen flow sensor 700 are provided on the exhaust channel 203, the oxygen concentration sensor 600 can be provided at the front end of the oxygen flow sensor 700, or at the rear end of the oxygen flow sensor 700. Specifically, the oxygen concentration sensor 600 may be arranged on the first exhaust channel 2031, and the oxygen flow sensor 700 may be arranged on the second exhaust channel 2032; or the oxygen concentration sensor 600 may be arranged on the second exhaust channel 2032, and the oxygen flow sensor 700 may be arranged on the first exhaust channel 2031; or both the oxygen concentration sensor 600 and the oxygen flow sensor 700 may be arranged on the first exhaust channel 2031; or both the oxygen concentration sensor 600 and the oxygen flow sensor 700 may be arranged on the second exhaust channel 2032.

[0053] Further, please refer to Figures 6 to 8 The oxygen concentration sensor 600 has an intake branch pipe 610 and an exhaust branch pipe 620 which are interconnected. A partition plate 240 is provided in the exhaust passage. The partition plate 240 divides the exhaust passage 203 into a proximal section 203a close to the exhaust port 2022 and a distal section 203b away from the exhaust port 2022. The intake branch pipe 610 and the exhaust branch pipe 620 are respectively connected to the proximal section 203a and the distal section 203b.

[0054] With such a configuration, the partition plate can block the gas in the adjacent section 203a, so that the gas enters the intake branch 610 of the oxygen concentration sensor 600, and then is discharged to the distant section 203b through the exhaust branch 620 of the oxygen concentration sensor 600, thereby achieving the effect of exhausting the gas outside the gas path module 1 through the distant section 203b.

[0055] Specifically, in order to prevent the oxygen concentration sensor 600 from occupying too much space of the exhaust channel 203, the channel wall of the exhaust channel 203 formed by the bracket 200 may be provided with two spaced-apart through holes, and the oxygen concentration sensor 600 is arranged on the outer side of the channel wall (i.e., the side of the channel wall away from the exhaust channel 203), and the intake branch pipe 610 and the exhaust branch pipe 620 of the oxygen concentration sensor 600 are respectively inserted into the two spaced-apart through holes, so that a part of the gas in the exhaust channel 203 enters the oxygen concentration sensor 600 through the intake branch pipe 610 for concentration detection, and is discharged again by the exhaust branch pipe 620 to the remote section 203b to further flow out to the outside of the gas path module 1. In addition, the partition plate 240 provided in the first exhaust channel 2031 is located between the two through holes, so that the partition plate 240 has a blocking effect on the gas in the adjacent section 203a, and enables the gas to be inhaled through the intake branch 610 of the oxygen concentration sensor 600 and discharged from the exhaust branch 620 to the distant section 203b; at the same time, more gas discharged from the exhaust branch 620 is prevented from flowing back to the adjacent section 203a of the exhaust channel 203 to a certain extent, thereby guiding the gas to be discharged outside the gas path module 1. In the technical solution of the present invention, the oxygen concentration sensor 600 can adopt an ultrasonic oxygen concentration sensor 600 or an electrochemical oxygen concentration sensor 600. Specifically, the ultrasonic oxygen concentration sensor 600 can be selected in the technical solution of the present invention, which mainly detects the concentration of oxygen in the mixed gas based on the principle that the propagation speed of ultrasonic waves in gases at different oxygen concentrations is different; the ultrasonic oxygen concentration sensor 600 has the advantages of low cost, high accuracy, fast response speed, long life, and no need for additional calibration during use.

[0056] Furthermore, if Figure 7 As shown, a plurality of through holes 241 are formed on the spacer plate 240 .

[0057] By setting the partition plate 240, on the one hand, the air flow can flow through the through hole 241 of the partition plate 240, so as to ensure that a part of the gas at the exhaust port 2022 of the exhaust fan 400 can continue to flow to the second exhaust channel 2032 after passing through the partition plate 240 of the first exhaust channel 2031, and then be discharged to the outside of the air path module 1 through the second exhaust channel 2032.

[0058] Furthermore, a muffler is provided at the end of the oxygen introduction device 300 .

[0059] By providing a muffler at the end of the oxygen introduction device 300 , the noise generated during the oxygen introduction process is reduced, thereby further reducing the noise generated when the gas circuit module 1 is working.

[0060] Specifically, a low-pressure oxygen channel and a high-pressure oxygen channel may be formed in the oxygen supply device 300, and the user may select different channels according to specific circumstances. Further, when the user selects the high-pressure oxygen channel, an electromagnetic proportional valve may be provided on the high-pressure oxygen channel to control the flow rate of oxygen passing through.

[0061] The present invention also provides a breathing machine, such as Figure 1 As shown, the ventilator includes an air circuit module 1, and the specific structure of the air circuit module 1 refers to the above embodiment. Since the ventilator adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0062] Furthermore, the ventilator also includes a circuit board 2, a display screen 3 and a protective shell 4, the protective shell 4 is provided with a display window, the display screen 3 is installed at the display window, and the display screen 3 is electrically connected to the circuit board 2; based on the above-mentioned solution that the gas circuit module 1 is provided with an oxygen concentration sensor 600 and an oxygen flow sensor 700, the oxygen concentration sensor 600 and the oxygen flow sensor 700 are also electrically connected to the circuit board 2, and the concentration measured by the oxygen concentration sensor 600 and the oxygen flow sensor 700 and the numerical values ​​calculated by the flow detection can be fed back to the display screen 3 through the circuit board 2, so that the display screen 3 can display the oxygen concentration value and the oxygen flow value. The protective shell 4 is also provided with an air inlet corresponding to the position of the air channel 201, and the air inlet cover 5 can be connected to the air inlet.

[0063] Specifically, the protective shell 4 may include an upper shell 100 and a lower shell 100, the upper shell 100 is provided with an installation cavity, the installation cavity has an installation port, the gas circuit module 1 is installed in the installation cavity through the installation port, and the lower shell 100 is detachably connected to the upper shell 100, and the installation port can be covered or opened. Further, when the gas circuit module 1 includes a heating and humidifying water tank 500, in order to facilitate the user to add water to the heating and humidifying water tank 500, the heating and humidifying water tank 500 can be arranged outside the installation cavity and connected to the upper shell 100 of the protective shell 4.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A gas path module, characterized in that: include: case; A bracket, wherein the bracket is disposed in the shell, and the bracket and the shell together enclose an air passage, a mixing chamber, and an exhaust passage; The mixing chamber has an inlet and an outlet that are interconnected, one end of the air channel is connected to the inlet, and the air channel includes at least two curved channels; one end of the exhaust channel is connected to the outlet, and the other end is connected to the outside of the shell; a one-way valve is provided at one end of the air channel that is connected to the inlet of the mixing chamber; the exhaust channel includes a first exhaust channel and a second exhaust channel, one end of the first exhaust channel is connected to the outlet, and the first exhaust channel is arranged perpendicular to the exhaust direction of the outlet; one end of the second exhaust channel is connected to the other end of the first exhaust channel, the other end of the second exhaust channel extends to the outside of the bracket, and the extension direction of the other end of the second exhaust channel is opposite to the exhaust direction of the outlet; The exhaust passage is provided with an oxygen concentration sensor; the oxygen concentration sensor has an air intake branch pipe and an exhaust branch pipe connected to each other, a partition plate is provided in the exhaust passage, the partition plate divides the exhaust passage into an adjacent section close to the exhaust port and a distant section away from the exhaust port, the air intake branch pipe and the exhaust branch pipe are connected to the adjacent section and the distant section respectively; a plurality of through holes are opened on the partition plate; an oxygen supply device, the oxygen supply device is connected to the bracket and communicated with the inlet; and An exhaust fan is arranged in the mixing chamber.

2. The gas circuit module according to claim 1, characterized in that: The air channel also includes at least three sub-channels arranged in parallel in sequence, each of the sub-channels has a head end for inhaling gas and a tail end for exhausting gas, and the two ends of the curved channel are respectively connected to the tail end of one of the two adjacent sub-channels and the head end of the other one.

3. The gas circuit module according to claim 2, characterized in that: At least four baffles are convexly arranged at intervals on one side of the bracket, and the plate surfaces of the at least four baffles are arranged in parallel; the sub-channel is formed between every two adjacent baffles.

4. The gas circuit module according to claim 1, characterized in that: The shell includes an upper cover and a bottom plate; one side of the bracket and the upper cover are combined to form the air channel, the other opposite side of the bracket and the bottom plate are combined to form the mixing chamber, and the suction port runs through the opposite sides of the bracket.

5. The gas circuit module according to claim 1, characterized in that: The gas circuit module also includes a heating and humidifying water tank, and the heating and humidifying water tank includes: an inlet end, the inlet end communicating with the other end of the second exhaust passage; and An outlet port is connected to the inlet port.

6. The gas circuit module according to any one of claims 1 to 5, characterized in that: The exhaust passage is provided with an oxygen flow sensor.

7. The gas circuit module according to any one of claims 1 to 5, characterized in that: A muffler is arranged at the end of the oxygen introduction device.

8. A ventilator, characterized in that: Comprising the gas circuit module as described in any one of claims 1 to 7.

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