Positive and negative flow generator and breathing test equipment

Abstract

The utility model discloses a positive and negative flow generator and breathing test equipment, and belongs to the technical field of breathing test equipment, and the positive and negative flow generator comprises a positive pressure air source used for generating positive pressure airflow; the regulating valve group is connected with the positive pressure air source, the flow regulating assembly is connected with the regulating valve group, and the flow regulating assembly is used for regulating the flow passing state of positive pressure air flow; the direction adjusting assembly is connected with the flow adjusting assembly and used for adjusting the direction of the positive pressure airflow; the airflow output port is connected with the direction adjusting assembly; the pressure transmitter is connected with the regulating valve group and is used for acquiring airflow information regulated by the regulating valve group; wherein the airflow information comprises pressure and flow. The technical problem that airflow parameters of positive airflow and negative airflow cannot be adjusted is solved, and the technical effects of improving airflow control precision and testing result accuracy are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of respiratory testing equipment, in particular to a positive and negative flow generator and a respiratory testing equipment. Background Art

[0002] A positive and negative flow generator is a device that can generate positive and negative flow. It is widely used in respiratory support equipment, gas flow sensor testing, flow metering equipment testing and other fields. By selecting different output ports, positive or negative flow can be obtained, thereby improving the portability, efficiency and accuracy of respiratory testing.

[0003] In the existing technology, positive and negative flow generators usually only have the function of generating positive and negative airflows, and are unable to adjust the airflow parameters of the positive and negative airflows, resulting in reduced flexibility and adaptability of the positive and negative flow generators in actual use, and unable to be optimized and adjusted according to actual conditions, which may affect work efficiency and the accuracy of test results. Utility Model Content

[0004] In order to solve the above problems, the first aspect of the present invention provides a positive and negative flow generator, comprising:

[0005] A positive pressure air source, used for generating a positive pressure airflow;

[0006] A regulating valve group connected to the positive pressure air source, the regulating valve group is used to adjust the state of the positive pressure airflow;

[0007] A flow regulating component connected to the regulating valve group, the flow regulating component is used to adjust the flow passage state of the positive pressure airflow;

[0008] a direction adjustment component connected to the flow adjustment component, the direction adjustment component being used to adjust the direction of the positive pressure airflow;

[0009] and an airflow outlet connected to the direction adjustment component;

[0010] It also includes: a pressure transmitter, the pressure transmitter is connected to the regulating valve group, and is used to obtain airflow information after the regulating valve group adjusts;

[0011] The airflow information includes pressure and flow.

[0012] In some embodiments, the regulating valve group includes: a stop valve and a pressure reducing valve, wherein the stop valve is used to adjust the passage state of the positive pressure airflow, and the pressure reducing valve is used to adjust the pressure of the positive pressure airflow.

[0013] In some embodiments, the flow regulating assembly includes a first two-position three-way valve, and a first solenoid valve and a second solenoid valve connected to the first two-position three-way valve;

[0014] Among them, the input end of the first two-position three-way valve is connected to the regulating valve group, and the output end is connected to the first solenoid valve and the second solenoid valve respectively. The first two-position three-way valve is adapted to the first solenoid valve and the second solenoid valve, and is used to adjust the flow passage state of the positive pressure airflow.

[0015] In some embodiments, the direction adjustment assembly includes: a first three-way port, a second two-position three-way valve connected to the first three-way port, and a vacuum generator connected to the second two-position three-way valve;

[0016] The first three-way port is connected to the first solenoid valve and the second solenoid valve;

[0017] The second two-position three-way valve is connected to the first three-way port, the vacuum generator is connected to the second two-position three-way valve, and the vacuum generator is adapted to the second two-position three-way valve for adjusting the direction of the positive pressure airflow.

[0018] In some embodiments, the air flow output port includes a third two-position three-way valve, a fourth two-position three-way valve, a second three-way port connected to the third two-position three-way valve and the fourth two-position three-way valve, a third three-way port connected to the third two-position three-way valve and the fourth two-position three-way valve, a first interface connected to the second three-way port, and a second interface connected to the third three-way port;

[0019] The third two-position three-way valve is connected to the second two-position three-way valve for receiving the positive pressure airflow generated by the direction adjustment component, and the fourth two-position three-way valve is connected to the vacuum generator for receiving the negative pressure airflow generated by the direction adjustment component.

[0020] In some embodiments, the first interface is a standard interface, and the second interface is a quick-plug interface.

[0021] A second aspect of the present invention provides a respiratory testing device, comprising the positive and negative flow generator described in any one of the above solutions.

[0022] By adopting the above solution, the utility model mainly has the following technical effects:

[0023] Physical values ​​such as airway pressure and flow are obtained through a pressure transmitter and converted into electrical signals for feedback. The operator can adjust the pressure reducing valve according to the airflow information fed back by the pressure transmitter to achieve pressure control and ultimately obtain the required flow. This solves the technical problem of being unable to adjust the airflow parameters of positive and negative airflows, and achieves the technical effect of improving the accuracy of airflow control and test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural block diagram of a positive and negative flow generator of the utility model;

[0025] Figure 2 This is a block diagram of the internal structure of a positive and negative flow generator of the utility model;

[0026] Figure 3 This is a structural diagram of a positive and negative flow generator of the utility model.

[0027] The meanings of the reference numerals are as follows:

[0028] 1. Positive pressure air source;

[0029] 2. Regulating valve group; 21. Stop valve; 22. Pressure reducing valve;

[0030] 3. Flow regulating assembly; 31. First two-position three-way valve; 32. First solenoid valve; 33. Second solenoid valve;

[0031] 4. Direction adjustment assembly; 41. First three-way port; 42. Second two-position three-way valve; 43. Vacuum generator;

[0032] 5. Airflow outlet; 51. Third two-position three-way valve; 52. Fourth two-position three-way valve; 53. Second three-way port; 54. Third three-way port; 55. First interface; 56. Second interface;

[0033] 6. Pressure transmitter. DETAILED DESCRIPTION

[0034] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the specification of the present invention. Obviously, the embodiments described 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 making creative efforts shall fall within the scope of protection of the present invention.

[0035] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] Example 1

[0037] See also Figure 1-Figure 3The first aspect of the present invention provides a positive and negative flow generator for generating positive and negative airflows in a respiratory testing device, comprising: a positive pressure air source 1, a regulating valve group 2 connected to the positive pressure air source 1, a flow regulating component 3 connected to the regulating valve group 2, a direction regulating component 4 connected to the flow regulating component 3, and an airflow output port 5 connected to the direction regulating component 4.

[0038] In some embodiments, the positive pressure air source 1 is used to generate a positive pressure airflow. The positive pressure airflow can be an electric air supply or a compressed air source. For example, the electric method uses an electric motor to drive a compression pump or a foldable bladder to generate the positive pressure airflow; the pneumatic method uses a compressed air pump, which is filtered, decompressed, humidified, and other processes to generate the positive pressure airflow. In some embodiments, the positive pressure air source 1 can be obtained from an external device and connected to a positive and negative flow generator to supply the positive pressure airflow to the positive and negative flow generator.

[0039] In some embodiments, the regulating valve group 2 is used to adjust the state of the positive pressure airflow. In some embodiments, the regulating valve group 2 includes: a stop valve 21 and a pressure reducing valve 22, wherein the stop valve 21 is used to adjust the passage state of the positive pressure airflow, and the pressure reducing valve 22 is used to adjust the pressure of the positive pressure airflow.

[0040] Furthermore, the flow regulating component 3 is used to regulate the flow passage state of the positive pressure airflow, which includes a first two-position three-way valve 31, and a first solenoid valve 32 and a second solenoid valve 33 connected to the first two-position three-way valve 31; wherein, the input end of the first two-position three-way valve 31 is connected to the regulating valve group 2, and the output end is connected to the first solenoid valve 32 and the second solenoid valve 33 respectively, and the first two-position three-way valve 31 is adapted to the first solenoid valve 32 and the second solenoid valve 33, and is used to regulate the flow passage state of the positive pressure airflow. For example, by regulating the first two-position three-way valve 31, the output end of the first two-position three-way valve 31 can be connected to the first solenoid valve 32 to pass a large flow of positive pressure airflow; by regulating the first two-position three-way valve 31, the output end of the first two-position three-way valve 31 can be connected to the second solenoid valve 33 to pass a micro flow of positive pressure airflow.

[0041] Furthermore, the direction adjustment assembly 4 is used to adjust the direction of the positive pressure airflow to generate positive or negative pressure airflow, and includes: a first three-way port 41, a second two-position three-way valve 42 connected to the first three-way port 41, and a vacuum generator 43 connected to the second two-position three-way valve 42. In some embodiments, two groups of connection ports of the first three-way port 41 are respectively connected to the first solenoid valve 32 and the second solenoid valve 33, thereby receiving the positive pressure air source after the flow rate is adjusted by the flow adjustment assembly 3.

[0042] In some embodiments, the second two-position three-way valve 42 is connected to the first three-way port 41, and the vacuum generator 43 is connected to the second two-position three-way valve 42. The vacuum generator 43 is adapted to the second two-position three-way valve 42 to adjust the direction of the positive pressure airflow. It will be understood by those skilled in the art that the vacuum generator 43 is generally composed of a nozzle, a receiving chamber, a mixing chamber, and a diffusion chamber. By controlling the flow of compressed air, a high-speed airflow can be generated at the nozzle outlet. According to the continuity equation and Bernoulli equation in fluid mechanics, an increase in flow rate will lead to a decrease in pressure. When the flow rate increases to a certain extent, the pressure will be lower than atmospheric pressure, forming a negative pressure area, which can produce an adsorption effect, thereby generating a negative pressure air source by using a positive pressure air source through the vacuum generator 43.

[0043] Furthermore, the airflow output port 5 is used to output positive or negative airflow. In some embodiments, the airflow output port 5 includes a third two-position three-way valve 51, a fourth two-position three-way valve 52, a second three-way port 53 connected to the third two-position three-way valve 51 and the fourth two-position three-way valve 52, a third three-way port 54 connected to the third two-position three-way valve 51 and the fourth two-position three-way valve 52, a first interface 55 connected to the second three-way port 53, and a second interface 56 connected to the third three-way port 54.

[0044] In some embodiments, the third two-position three-way valve 51 is connected to the second two-position three-way valve 42 for receiving the positive pressure airflow generated by the direction adjustment component 4, and the fourth two-position three-way valve 52 is connected to the vacuum generator 43 for receiving the negative pressure airflow generated by the direction adjustment component 4.

[0045] Furthermore, two groups of connecting ports of the second three-way port 53 are respectively connected to the third two-position three-way valve 51 and the fourth two-position three-way valve 52, thereby receiving the positive pressure or negative pressure airflow generated by the direction adjustment component 4, and the other connecting port is connected to the first interface 55 or the second interface 56. Two groups of connecting ports of the third three-way port 53 are respectively connected to the third two-position three-way valve 51 and the fourth two-position three-way valve 52, thereby receiving the positive pressure or negative pressure airflow generated by the direction adjustment component 4, and the other connecting port is connected to the first interface 55 or the second interface 56.

[0046] In some embodiments, the first interface 53 may be a standard interface, and the second interface 54 may be a quick-plug interface. By setting the first interface 53 and the second interface 54, the operator can make a selection according to needs during use, thereby improving practicality.

[0047] In some embodiments, the positive and negative flow generator also includes: a pressure transmitter 6, which is connected to the regulating valve group 2 and is used to obtain the airflow information after adjustment by the regulating valve group 2, wherein the airflow information includes pressure and flow. In some embodiments, the pressure transmitter 6 can obtain physical values ​​such as airway pressure and flow, and convert them into electrical signals for feedback. The operator can adjust the pressure reducing valve 22 according to the airflow information fed back by the pressure transmitter 6 to achieve pressure control and ultimately obtain the required flow.

[0048] Example 2

[0049] A second aspect of the present invention provides a respiratory testing device, comprising the positive and negative flow generator in the first embodiment.

[0050] Finally, it should be noted that the embodiments disclosed in the present invention are only preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A positive and negative flow generator, characterized in that: include: A positive pressure air source, used for generating a positive pressure airflow; A regulating valve group connected to the positive pressure air source, the regulating valve group is used to adjust the state of the positive pressure airflow; A flow regulating component connected to the regulating valve group, the flow regulating component is used to adjust the flow passage state of the positive pressure airflow; a direction adjustment component connected to the flow adjustment component, the direction adjustment component being used to adjust the direction of the positive pressure airflow; and an airflow outlet connected to the direction adjustment component; It also includes: a pressure transmitter, which is connected to the regulating valve group and is used to obtain airflow information after the regulating valve group adjusts the airflow; The airflow information includes pressure and flow.

2. A positive and negative flow generator according to claim 1, characterized in that: The regulating valve group includes: a stop valve and a pressure reducing valve, wherein the stop valve is used to adjust the passage state of the positive pressure airflow, and the pressure reducing valve is used to adjust the pressure of the positive pressure airflow.

3. A positive and negative flow generator according to claim 1, characterized in that: The flow regulating assembly includes a first two-position three-way valve, and a first solenoid valve and a second solenoid valve connected to the first two-position three-way valve; Among them, the input end of the first two-position three-way valve is connected to the regulating valve group, and the output end is connected to the first solenoid valve and the second solenoid valve respectively. The first two-position three-way valve is adapted to the first solenoid valve and the second solenoid valve, and is used to adjust the flow passage state of the positive pressure airflow.

4. A positive and negative flow generator according to claim 3, characterized in that: The direction adjustment assembly includes: a first three-way port, a second two-position three-way valve connected to the first three-way port, and a vacuum generator connected to the second two-position three-way valve; The first three-way port is connected to the first solenoid valve and the second solenoid valve; The second two-position three-way valve is connected to the first three-way port, the vacuum generator is connected to the second two-position three-way valve, and the vacuum generator is adapted to the second two-position three-way valve for adjusting the direction of the positive pressure airflow.

5. A positive and negative flow generator according to claim 4, characterized in that: The airflow output port includes a third two-position three-way valve, a fourth two-position three-way valve, a second three-way port connected to the third two-position three-way valve and the fourth two-position three-way valve, a third three-way port connected to the third two-position three-way valve and the fourth two-position three-way valve, a first interface connected to the second three-way port, and a second interface connected to the third three-way port; The third two-position three-way valve is connected to the second two-position three-way valve for receiving the positive pressure airflow generated by the direction adjustment component, and the fourth two-position three-way valve is connected to the vacuum generator for receiving the negative pressure airflow generated by the direction adjustment component.

6. A positive and negative flow generator according to claim 5, characterized in that: The first interface is a standard interface, and the second interface is a quick-plug interface.

7. A breath testing device, characterized in that The positive and negative flow generator comprises the positive and negative flow generator according to any one of claims 1 to 6.

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