Cavity sampling structure and ventilator

Abstract

The present invention relates to the technical field of ventilators, and in particular, to a cavity sampling structure and a ventilator. The cavity sampling structure includes an air inlet side shell, an air outlet side shell, an air resistance and a sampling detection component; the air inlet side shell is provided with an air inlet, the air outlet side shell is provided with an air outlet, the air inlet side shell and the air outlet side shell are connected, and together form an inner cavity; the air resistance is contained in the inner cavity, and an air guide channel connected to the air inlet and the air outlet is provided in the air resistance, the outer wall of the air resistance is spaced from the inner wall of the inner cavity, and together form a first chamber and a second chamber that block each other, and the first chamber is located on the side of the second chamber close to the air inlet; the sampling detection component is connected to one or both of the first chamber and the second chamber. The cavity sampling structure is used for a ventilator, which can overcome the influence of the turbulence and eddy current of the air flow at the sampling port, improve the accuracy, stability and reliability of the detection data, and thus better meet the patient's use needs.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilators, and in particular to a cavity sampling structure and a ventilator. Background Art

[0002] At present, during the use of ventilators, their parameters such as flow and pressure need to be tested accordingly to meet the patient's usage needs. During the process of sampling and testing their working data, due to the flow of gas at the sampling port, the detection accuracy is easily affected by the turbulence and eddy currents of the airflow, resulting in inaccurate, unstable and low reliability of the detection data. Summary of the Invention

[0003] The purpose of the present invention includes, for example, providing a cavity sampling structure and a ventilator, which can overcome the influence of airflow turbulence and eddy current at the sampling port, improve the accuracy, stability and reliability of detection data, and thus better meet the patient's usage needs.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides a cavity sampling structure, which includes an air inlet side shell, an air outlet side shell, an air resistance, and a sampling detection component;

[0006] The air inlet side shell is provided with an air inlet, the air outlet side shell is provided with an air outlet, the air inlet side shell and the air outlet side shell are connected to form an inner cavity together;

[0007] The air resistance is contained in the inner cavity, and an air guide channel communicating with the air inlet and the air outlet is configured in the air resistance. The outer wall of the air resistance is spaced from the inner wall of the inner cavity, and together form a first chamber and a second chamber that block each other. The first chamber is located on a side of the second chamber close to the air inlet.

[0008] The sampling and detection component is communicated with one or both of the first chamber and the second chamber.

[0009] In an optional embodiment, an annular platform is provided around the axis of the outer periphery of the air resistor, and the annular platform is used to abut against the inner wall of the inner cavity, and the annular platform is used to separate the area between the outer wall of the air resistor and the inner wall of the inner cavity into a first chamber and a second chamber.

[0010] In an optional embodiment, a plurality of first guide grooves are opened in the area of ​​the first cavity of the air resistance molding, and the first guide grooves connect the first cavity with the air guide channel;

[0011] A plurality of second guide grooves are provided in the area of ​​the second cavity of the air resistance molding, and the second guide grooves connect the second cavity with the air guide channel.

[0012] In an optional embodiment, the plurality of first guide grooves and the plurality of second guide grooves are arranged at intervals around the axis of the air resistance.

[0013] In an optional embodiment, the air inlet side shell includes a first segment and a second segment, and the inner diameter of the first segment is smaller than the inner diameter of the second segment; the air outlet side shell includes a first subsection and a second subsection, and the inner diameter of the first subsection is smaller than the inner diameter of the second subsection;

[0014] The inner diameter of the second part is greater than the outer diameter of the second segment, the second part is sleeved on the second segment, and the air resistance is located in the second part and the second segment.

[0015] In an optional embodiment, an annular abutment platform is provided in the air outlet side shell, the annular abutment platform is located at the connection between the first section and the second section, and the annular abutment platform abuts against one end of the air resistance facing the air outlet side shell.

[0016] In an optional embodiment, the sampling and detection component includes a flow sensor, which is connected to the first chamber and the second chamber.

[0017] In an optional embodiment, the sampling and detection assembly further includes a pressure sensor, which is connected to the second chamber.

[0018] In an optional embodiment, the cavity sampling structure further includes a silicone guide member; a first guide channel communicating with the first chamber is opened in the area of ​​the air inlet side shell facing the first chamber, and a second guide channel and a third guide channel communicating with the second chamber are opened in the area of ​​the air outlet side shell facing the second chamber;

[0019] The flow sensor is communicated with the first flow guide channel and the second flow guide channel through the silica gel flow guide member, and the pressure sensor is communicated with the third flow guide channel through the silica gel flow guide member.

[0020] In a second aspect, the present invention provides a ventilator comprising the above-mentioned cavity sampling structure.

[0021] The beneficial effects of the embodiments of the present invention include:

[0022] The cavity sampling structure includes an air inlet shell, an air outlet shell, an air block, and a sampling detection component; the air inlet shell is provided with an air inlet, the air outlet shell is provided with an air outlet, the air inlet shell and the air outlet shell are connected to form an inner cavity; the air block is placed in the inner cavity, and an air guide channel connected to the air inlet and the air outlet is provided in the air block, the outer wall of the air block is spaced from the inner wall of the inner cavity, and together form a first chamber and a second chamber that block each other, the first chamber is located on the side of the second chamber close to the air inlet; the sampling detection component is connected to one or both of the first chamber and the second chamber. The cavity sampling structure is used for a ventilator, which can overcome the influence of turbulence and eddy currents of the air flow at the sampling port, improve the accuracy, stability, and reliability of the detection data, and thus better meet the patient's needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 is a cross-sectional view of the cavity sampling structure in a first perspective according to an embodiment of the present invention;

[0025] Figure 2 is a cross-sectional view of the cavity sampling structure according to the embodiment of the present invention from a second viewing angle;

[0026] Figure 3 Schematic diagram of the decomposition of the cavity sampling structure in an embodiment of the present invention.

[0027] Icons: 100-cavity sampling structure; 110-air inlet side shell; 120-air outlet side shell; 130-air resistance; 140-sampling detection component; 111-air inlet; 121-air outlet; 101-inner cavity; 131-air guide channel; 102-first chamber; 103-second chamber; 132-annular platform; 133-first guide groove; 134-second guide groove; 112-first section; 113-second section; 122-first division; 123-second division; 124-annular support platform; 141-flow sensor; 142-pressure sensor; 150-silicone guide member; 114-first guide channel; 125-second guide channel; 126-third guide channel; 160-sealing ring. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0033] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0034] Please refer to Figure 1-Figure 3 , this embodiment provides a cavity sampling structure 100, the cavity sampling structure 100 includes an air inlet side shell 110, an air outlet side shell 120, an air resistance 130 and a sampling detection component 140;

[0035] The air inlet shell 110 is provided with an air inlet 111 , and the air outlet shell 120 is provided with an air outlet 121 . The air inlet shell 110 and the air outlet shell 120 are connected to form an inner cavity 101 .

[0036] The air resistance 130 is housed in the inner cavity 101 and is provided with an air guide channel 131 communicating with the air inlet 111 and the air outlet 121. The outer wall of the air resistance 130 is spaced from the inner wall of the inner cavity 101, and together they form a first chamber 102 and a second chamber 103 that are blocked from each other. The first chamber 102 is located on the side of the second chamber 103 that is closer to the air inlet 111.

[0037] The sampling and detection assembly 140 is in communication with one or both of the first chamber 102 and the second chamber 103 .

[0038] Please refer to Figure 1-Figure 3 The working principle of the cavity sampling structure 100 is:

[0039] The cavity sampling structure 100 includes an air inlet side shell 110, an air outlet side shell 120, an air resistance 130 and a sampling and detection component 140; the air inlet side shell 110 is provided with an air inlet 111, and the air outlet side shell 120 is provided with an air outlet 121. The air inlet side shell 110 and the air outlet side shell 120 are connected and together form an inner cavity 101; the air resistance 130 is accommodated in the inner cavity 101, and an air guide channel 131 communicating with the air inlet 111 and the air outlet 121 is provided in the air resistance 130. The outer wall of the air resistance 130 is spaced from the inner wall of the inner cavity 101, and together form a first chamber 102 and a second chamber 103 that block each other. The first chamber 102 is located on the side of the second chamber 103 close to the air inlet 111; the sampling and detection component 140 is communicated with one or both of the first chamber 102 and the second chamber 103;

[0040] Therefore, through such a setting, the sampling and detection component 140 can be connected with one or two of the first chamber 102 and the second chamber 103 to complete the sampling and detection. In this process, the first chamber 102 and the second chamber 103 can be formed through the setting of the air resistance 130, and the first chamber 102 and the second chamber 103 can be connected with the inner cavity 101 through the air guide channel 131, so that the sampling and detection component 140 can collect samples in the first chamber 102 and the second chamber 103 for detection, and since the airflow in the first chamber 102 and the second chamber 103 basically does not flow, there is no turbulence and vortex of the airflow. Therefore, when the cavity sampling structure 100 is used in a ventilator, it can overcome the influence of the turbulence and vortex of the airflow at the sampling port, improve the accuracy, stability and reliability of the detection data, and thus better meet the patient's usage needs.

[0041] It should be noted that this embodiment is described by taking the application of the cavity sampling structure 100 in a ventilator to complete airflow sampling and detection as an example, and in other embodiments of the present invention, it can also be applied to other types of structures or devices.

[0042] For further information, please refer to Figure 1-Figure 3 In this embodiment, in order to separate the outer wall of the air block 130 from the inner wall of the inner cavity 101 and to form a mutually blocked first chamber 102 and a second chamber 103, an annular platform 132 is provided around the axis of the outer circumference of the air block 130. The annular platform 132 is used to abut against the inner wall of the inner cavity 101 and to separate the area between the outer wall of the air block 130 and the inner wall of the inner cavity 101 into the first chamber 102 and the second chamber 103. In other embodiments of the present invention, a boss may be provided on the inner wall of the air inlet-side housing 110 or the air outlet-side housing 120, and the boss may abut against the outer wall of the air block 130 to separate the outer wall of the air block 130 from the inner wall of the inner cavity 101 into the first chamber 102 and the second chamber 103.

[0043] On the basis of the above-mentioned formation of the first cavity 102 and the second cavity 103, in order to connect the first cavity 102 and the second cavity 103 with the air guide channel 131, a plurality of first guide grooves 133 are formed in the area of ​​the air resistor 130 where the first cavity 102 is formed. The first guide grooves 133 connect the first cavity 102 with the air guide channel 131; and a plurality of second guide grooves 134 are formed in the area of ​​the air resistor 130 where the second cavity 103 is formed. The second guide grooves 134 connect the second cavity 103 with the air guide channel 131. Moreover, the plurality of first guide grooves 133 and the plurality of second guide grooves 134 are arranged at intervals around the axis of the air resistor 130.

[0044] It should be noted that, since there is a certain pressure difference at both ends of the air guide channel 131 after the air resistor 130 is configured in the inner cavity 101, in order to improve the detection accuracy, the first guide groove 133 and the second guide groove 134 can be respectively arranged at both ends of the air resistor 130 to correspond to the two areas with pressure difference.

[0045] For further information, please refer to Figure 1-Figure 3 In this embodiment, the air inlet side shell 110 includes a first segment 112 and a second segment 113, and the inner diameter of the first segment 112 is smaller than the inner diameter of the second segment 113; the air outlet side shell 120 includes a first subsection 122 and a second subsection 123, and the inner diameter of the first subsection 122 is smaller than the inner diameter of the second subsection 123;

[0046] The inner diameter of the second portion 123 is greater than the outer diameter of the second segment 113 , and the second portion 123 is sleeved in the second segment 113 , and the air resistance 130 is located within the second portion 123 and the second segment 113 .

[0047] By means of the above-mentioned structural arrangement, after the second sub-portion 123 is sleeved on the second segment 113, the area where the second segment 113 and the second sub-portion 123 are stacked is the area where the above-mentioned air resistance 130 is installed. Moreover, after the air resistance 130 is installed in this part, the air resistance 130 is located within the second sub-portion 123 and the second segment 113, thereby simplifying the installation steps of the air resistance 130. At the same time, when installing the air resistance 130, due to the above-mentioned structural arrangement, the air resistance 130 can be positioned by means of the two ends of the air resistance 130 respectively abutting against the second sub-portion 123 and the end of the second segment 113 that is away from each other. It should also be noted that, due to the above-mentioned content, It is known that by installing the air resistor 130, the first chamber 102 and the second chamber 103 can be formed together with the inner cavity 101. Therefore, by making the two ends of the air resistor 130 respectively abut against the ends of the second division 123 and the second segment 113 away from each other, it is conducive to forming an independent first chamber 102 and the second chamber 103, so that the first chamber 102 and the second chamber 103 are connected to the air guide channel 131 through the first guide groove 133 and the second guide groove 134, so that the first chamber 102 and the second chamber 103 can be effectively prevented from being affected by airflow turbulence and vortex on the basis of the first chamber 102 and the second chamber 103 being connected in the air guide channel 131.

[0048] Based on the above structure, please refer to Figure 1-Figure 3 In this embodiment, an annular supporting platform 124 is provided in the air outlet side shell 120. The annular supporting platform 124 is located at the connection between the first section 122 and the second section 123, and the annular supporting platform 124 is supported by the air resistance 130 toward one end of the air outlet side shell 120.

[0049] For further information, please refer to Figure 1-Figure 3 In this embodiment, when configuring the sampling detection component 140, the sampling detection component 140 includes a flow sensor 141 and a pressure sensor 142. Alternatively, one of the flow sensor 141 and the pressure sensor 142 may be configured; wherein the flow sensor 141 is connected to the first chamber 102 and the second chamber 103, and the pressure sensor 142 is connected to the second chamber 103.

[0050] In order to enable the above-mentioned flow sensor 141 and pressure sensor 142 to complete sampling and detection, the cavity sampling structure 100 also includes a silicone guide member 150; and due to the structural arrangement of the above-mentioned air inlet side shell 110 and air outlet side shell 120, a first guide channel 114 communicating with the first chamber 102 can be opened in the area of ​​the air inlet side shell 110 facing the first chamber 102, and a second guide channel 125 and a third guide channel 126 communicating with the second chamber 103 can be opened in the area of ​​the air outlet side shell 120 facing the second chamber 103, that is, the first guide channel 114 is arranged on the second section 113, and the second guide channel 125 and the third guide channel 126 are arranged on the second section 123; on this basis, the flow sensor 141 is communicated with the first guide channel 114 and the second guide channel 125 through the silicone guide member 150, and the pressure sensor 142 is communicated with the third guide channel 126 through the silicone guide member 150.

[0051] It should be noted that, based on the above-mentioned setting of the first guide groove 133 and the second guide groove 134, the first chamber 102 and the second chamber 103 can be connected to the two ends of the air guide channel 131 respectively, and there is a certain pressure difference at both ends of the air guide channel 131, and the first guide channel 114 is connected to the first chamber 102, and the second guide channel 125 and the third guide channel 126 are connected to the second chamber 103. Therefore, when the flow sensor 141 is connected to the first guide channel 114 and the second guide channel 125 through the silicone guide member 150 to monitor the internal airflow flow, and when the pressure sensor 142 is connected to the third guide channel 126 through the silicone guide member 150 to monitor the internal pressure, the monitoring accuracy is improved and the influence of the airflow turbulence and eddy current is reduced.

[0052] In addition, in order to improve the sealing performance of the cavity sampling structure 100 , a sealing ring 160 is provided at the connection between the air inlet side shell 110 and the air outlet side shell 120 .

[0053] In summary, please refer to Figure 1-Figure 3 The working process of the cavity sampling structure 100 is as follows:

[0054] When airflow enters the air inlet side housing 110 from the air inlet 111, it is introduced into the air guide channel 131 of the air resistor 130. The air resistor 130 will hinder the flow of gas in the air guide channel 131, resulting in a pressure difference on both sides of the air resistor 130. The first guide groove 133 and the second guide groove 134 on the air resistor 130 respectively guide the air pressure on both sides into the first chamber 102 and the second chamber 103. The air is then transmitted through the first guide channel 114, the second guide channel 125, and the third guide channel 126 through the holes in the silicone guide member 150 to the flow sensor 141 and the pressure sensor 142. The flow sensor 141 and the pressure sensor 142 output signals, which are then calculated to obtain the flow rate and pressure values ​​of the output gas.

[0055] In the above process, since the air in the first chamber 102 and the second chamber 103 does not circulate and is not affected by the gas state and vortex, the stability and regularity of the airflow and air pressure delivered to the flow sensor 141 and the pressure sensor 142 are improved, and the flow value and pressure value of the output gas are obtained by simple calculation by the machine; if the first chamber 102 and the second chamber 103 are not set, the turbulent airflow in the air guide channel 131 and the uncontrollable vortex after the airflow passes through the air resistance 130 will directly affect the stability of the pressure output to the sensor, and its fixed law cannot be grasped, and the value calculated by conventional machine will deviate greatly from the actual measured value.

[0056] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A cavity sampling structure, characterized in that: The cavity sampling structure includes an air inlet side shell, an air outlet side shell, an air resistance and a sampling detection component; The air inlet shell is provided with an air inlet, the air outlet shell is provided with an air outlet, the air inlet shell and the air outlet shell are connected to form an inner cavity together; The air resistor is housed in the inner cavity, and an air guide channel communicating with the air inlet and the air outlet is configured in the air resistor. The outer wall of the air resistor is spaced from the inner wall of the inner cavity, and together form a first chamber and a second chamber that block each other, and the first chamber is located on a side of the second chamber close to the air inlet; The sampling and detection component is in communication with one or both of the first chamber and the second chamber; A plurality of first guide grooves are formed in the area of ​​the first cavity of the air resistance molding, and the first guide grooves connect the first cavity with the air guide channel; A plurality of second guide grooves are provided in the area of ​​the second cavity of the air resistance molding, and the second guide grooves connect the second cavity with the air guide channel; The air inlet side shell includes a first segment and a second segment, and the inner diameter of the first segment is smaller than the inner diameter of the second segment; the air outlet side shell includes a first subsection and a second subsection, and the inner diameter of the first subsection is smaller than the inner diameter of the second subsection; The inner diameter of the second sub-portion is larger than the outer diameter of the second segment, the second sub-portion is sleeved on the second segment, and the air resistance is located within the second sub-portion and the second segment; The cavity sampling structure further includes a silica gel guide member; a first guide channel communicating with the first chamber is opened in the area of ​​the air inlet side shell facing the first chamber, and a second guide channel and a third guide channel communicating with the second chamber are opened in the area of ​​the air outlet side shell facing the second chamber; The sampling and detection component also includes a flow sensor and a pressure sensor. The flow sensor is connected to the first guide channel and the second guide channel through the silicone guide member, and the pressure sensor is connected to the third guide channel through the silicone guide member.

2. The cavity sampling structure according to claim 1, characterized in that: An annular platform is provided around the axis of the outer periphery of the air resistor, and the annular platform is used to abut against the inner wall of the inner cavity, and the annular platform is used to separate the area between the outer wall of the air resistor and the inner wall of the inner cavity into the first chamber and the second chamber.

3. The cavity sampling structure according to claim 1, characterized in that: The plurality of first guide grooves and the plurality of second guide grooves are arranged at intervals around the axis of the air resistance.

4. The cavity sampling structure according to claim 1, characterized in that: An annular abutment platform is provided in the air outlet side shell. The annular abutment platform is located at the connection between the first branch and the second branch, and the annular abutment platform abuts against one end of the air resistance facing the air outlet side shell.

5. The cavity sampling structure according to any one of claims 1 to 4, characterized in that: The flow sensor is in communication with the first chamber and the second chamber.

6. The cavity sampling structure according to claim 5, characterized in that: The pressure sensor is in communication with the second chamber.

7. A ventilator, characterized in that: The ventilator comprises the cavity sampling structure according to any one of claims 1-6.

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