Breathing circuit module and anesthesia machine

Abstract

The utility model provides a breathing circuit module and an anaesthesia machine, the breathing circuit module comprises a mounting rack, and a gas pipeline, a flow meter and a heater arranged on the mounting rack, the flow meter is configured to detect the flow of gas passing through the gas pipeline, the flow meter comprises a pipe joint, the pipe joint is connected to the gas pipeline and communicates with the gas pipeline, and the heater is arranged on the mounting rack; the heater and the pipe joint are oppositely arranged at an interval, and the heater is configured to heat the pipe joint in a non-contact mode.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly relates to a breathing circuit module and an anesthesia machine. Background Art

[0002] An anesthesia machine is an instrument that uses inhaled anesthesia for general anesthesia. The anesthesia machine delivers the anesthetic gas inhaled by the patient and the gas exhaled by the patient to the patient through a breathing circuit module. Currently, in order to detect and adjust the gas flow rate in the breathing circuit module, a flow meter is usually provided in the anesthesia machine. However, in existing anesthesia machines, water vapor condensation easily occurs and adheres to the throttle member of the flow meter, affecting the detection accuracy of the flow meter. Utility Model Content

[0003] The present application provides a breathing circuit module and an anesthesia machine, which can solve the problem of low measurement accuracy of the flow meter of the existing anesthesia machine.

[0004] In a first aspect, the present application provides a breathing circuit module, including a mounting bracket, and a gas pipeline, a flow meter, and a heater disposed on the mounting bracket. The flow meter is configured to detect the flow rate of the gas passing through the gas pipeline. The flow meter includes a pipe joint, and the pipe joint is connected to the gas pipeline and is in communication with the gas pipeline. The heater is opposite to and spaced apart from the pipe joint, and is configured to heat the pipe joint in a non-contact manner.

[0005] In one embodiment, the pipe joint is a magnetic conductive member, and the heater includes an induction coil.

[0006] In one embodiment, the pipe joint is a heat conductive member, and the heater is a laser heater.

[0007] In one embodiment, the breathing circuit module includes a temperature sensor, and the temperature sensor is disposed on the mounting bracket. The temperature sensor is opposite to and spaced apart from the pipe joint, and is configured to measure the temperature of the pipe joint in a non-contact manner.

[0008] In one embodiment, the gas pipeline includes an inhalation pipeline and an exhalation pipeline. The flow meter includes a first flow meter and a second flow meter. The first flow meter includes a first pipe joint, and the first pipe joint is connected to the inhalation pipeline. The second flow meter includes a second pipe joint, and the second pipe joint is connected to the exhalation pipeline;

[0009] The first pipe joint and the second pipe joint are spaced apart, and the heater is disposed between the first pipe joint and the second pipe joint. The heater is configured to heat the first pipe joint and the second pipe joint.

[0010] In one embodiment, the flowmeter further includes a throttling member disposed within the pipe joint. The throttling member has an air flow passage that penetrates the throttling member and communicates with the gas pipeline. The pipe joint has two sets of sampling channels that penetrate the pipe wall of the pipe joint, and the two sets of sampling channels are arranged on both sides of the throttling member along the extending direction of the gas pipeline. The sampling channels are configured to communicate with a pressure detection unit.

[0011] In one embodiment, the pipe joint includes two sub-joints that are detachably connected to each other. The two sets of sampling channels are respectively disposed on the two sub-joints. The throttling member is disposed between the two sub-joints, and the air flow passage communicates between the two sub-joints.

[0012] In one embodiment, the two sub-joints are respectively a first sub-joint and a second sub-joint. The first sub-joint includes a positioning hole recessed in one end face of the pipe body of the first sub-joint. The second sub-joint includes a positioning post recessed in one end face of the pipe body of the second sub-joint. The throttling member includes a limiting hole that penetrates the throttling member. The positioning post passes through the limiting hole and is inserted into the positioning hole.

[0013] In one embodiment, the sub-joint includes a pipe body and a flow guiding member. The sampling channel penetrates the pipe wall of the pipe body. The flow guiding member is disposed inside the pipe body and on the side of the sampling channel away from the throttling member. One end of the flow guiding member is connected to the inner wall surface of the pipe body, and the other end extends and inclines towards the throttling member.

[0014] In a second aspect, the present application further provides a breathing circuit module, including a mounting bracket, and a gas pipeline, a flowmeter, and a heater disposed on the mounting bracket. The flowmeter is configured to detect the flow rate of the gas passing through the gas pipeline. The flowmeter includes a pipe joint that is connected to and communicates with the gas pipeline. The pipe joint is a magnetic conductive member. The heater includes an induction coil that is disposed on the outer peripheral side of the pipe joint.

[0015] In one embodiment, the flowmeter further includes a throttling member disposed within the pipe joint. The throttling member has an air flow passage that penetrates the throttling member and communicates with the gas pipeline. The pipe joint has two sets of sampling channels that penetrate the pipe wall of the pipe joint, and the two sets of sampling channels are arranged on both sides of the throttling member along the extending direction of the gas pipeline. The sampling channels are configured to communicate with a pressure detection unit.

[0016] In one embodiment, the pipe joint includes two sub-joints, the two sub-joints are detachably connected to each other, two groups of the sampling channels are respectively arranged on the two sub-joints, and the throttle member is arranged between the two sub-joints.

[0017] In a third aspect, the present application further provides an anesthesia machine, which includes a breathing circuit module and a host, and the breathing circuit module is connected to the host.

[0018] In one embodiment, the host includes a barometric pressure measuring unit and a flexible tube, and the barometric pressure measuring unit is communicated with the flexible tube;

[0019] The flowmeter further includes a throttle member, the throttle member is arranged in the pipe joint, the throttle member has an air flow channel, the air flow channel penetrates through the throttle member and is communicated with the gas pipeline, the pipe joint has two groups of sampling channels, the sampling channels penetrate through the pipe wall of the pipe joint, and the two groups of sampling channels are respectively arranged at opposite ends of the air flow channel;

[0020] The breathing circuit module further includes a connecting pipe, the connecting pipe is arranged on the mounting bracket; the connecting pipe is communicated with the sampling channel, and the connecting pipe is inserted into the flexible tube and is communicated with the flexible tube.

[0021] In one embodiment, the breathing circuit module includes a temperature sensor, the temperature sensor is opposite to and spaced from the pipe joint, and is configured to non-contact measure the temperature of the pipe joint, the host includes a main control module, the main control module is electrically connected to the heater and the temperature sensor, and the main control module is configured to adjust the heating power of the heater according to the temperature measured by the temperature sensor.

[0022] In summary, the breathing circuit module provided by the present application heats the flowmeter by setting a heater, raises the temperature of the gas flowing through the flowmeter, prevents water vapor from condensing and adhering to the throttle member, and affects the gas measurement accuracy of the flowmeter; it also heats the flowmeter in a non-contact manner, reduces the loss of heat during heat conduction, improves the heating efficiency, and can also achieve centralized and precise heating, avoiding the thermal influence on other areas. Finally, it also omits the wires for connecting and conducting heat between the heater and the flowmeter and the installation steps for precise alignment, reduces the requirement for installation accuracy when disassembling and assembling the breathing circuit module, and reduces the assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative efforts.

[0024] Figure 1 It is a partial structural schematic diagram of the anesthesia machine provided by the embodiment of the present application;

[0025] Figure 2 is Figure 1 a partial structural schematic diagram of the host shown;

[0026] Figure 3 is Figure 1 a structural schematic diagram of the breathing circuit module shown;

[0027] Figure 4 is Figure 3 an exploded structural diagram of the breathing circuit module shown;

[0028] Figure 5 is Figure 4 a structural schematic diagram of the first sub-mount shown;

[0029] Figure 6 is Figure 4 an exploded structural diagram of the flowmeter shown;

[0030] Figure 7 is Figure 6 a structural schematic diagram of the first sub-connector shown;

[0031] Figure 8 is Figure 6 a structural schematic diagram of the second sub-connector shown;

[0032] Figure 9 is Figure 6 a structural schematic diagram of the throttle member shown;

[0033] Figure 10 is Figure 1 a sectional structural diagram of the anesthesia machine along the A-A direction shown;

[0034] Figure 11 is Figure 1 a partial structural schematic diagram of the anesthesia machine shown. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0036] Please refer to Figure 1 , Figure 1 which is a partial structural schematic diagram of the anesthesia machine 1000 provided by the embodiment of the present application.

[0037] Anesthesia machine 1000 is an instrument that performs general anesthesia using the method of inhaled anesthesia. The anesthesia machine 1000 includes a main unit 200 and a breathing circuit module 100, and the breathing circuit module 100 is connected to the main unit 200. In some embodiments, the breathing circuit module 100 is detachably connected to the main unit 200 to facilitate removing the breathing circuit module 100 from the main unit 200 for cleaning, maintenance, or replacement. The anesthesia machine 1000 is connected to a patient through the breathing circuit module 100 to supply anesthetic gas to the patient.

[0038] Please refer to Figure 2 , Figure 2 for Figure 1 the partial structural schematic diagram of the main unit 200 shown.

[0039] In the embodiments of the present application, the main unit 200 includes a frame 201 and a connection plate 202, and the connection plate 202 is fixedly connected to one side of the frame 201. The frame 201 is generally a hollow cuboid, and the frame 201 has an internal space 203. The internal space 203 of the frame 201 is used to install the main control module 208 ( Figure 2 not shown) etc. of the main unit 200. The connection plate 202 is located on one side of the frame 201 and jointly encloses a receiving space 204 with the frame 201 for installing the breathing circuit module 100. Exemplarily, the receiving space 204 and the internal space 203 of the frame 201 can be arranged along the length direction of the frame 201, so that the arrangement of the breathing circuit module 100 and the main unit 200 is more compact, reducing the space occupied by the breathing circuit module 100 in the anesthesia machine 1000.

[0040] In this embodiment, the main unit 200 further includes a pressure measurement unit (not shown in the figure) and a flexible tube 205. The material of the flexible tube 205 can be a polymer material such as silica gel or rubber. The flexible tube 205 is installed on the side of the connection plate 202 facing the receiving space 204, and one end of the flexible tube 205 is communicated with the pressure measurement unit. Among them, the flexible tube 205 constitutes a part of the gas pipeline of the main unit 200 and is configured to be communicated with the gas pipeline 30 of the breathing circuit module 100, thereby realizing the gas circulation between the breathing circuit module 100 and the main unit 200. In this embodiment, there can be two groups of flexible tubes 205, and the number of each group of flexible tubes 205 can be two. Each group of two flexible tubes 205 are respectively the first flexible tube 205A and the second flexible tube 205B. The pressure measurement unit can measure the pressure of the gas in the breathing circuit module 100. In this embodiment, the pressure measurement unit is integrated on the circuit board of the main unit 200, and the circuit board is installed in the internal space 203 of the frame 201.

[0041] Please refer to Figures 3 to 5 , Figure 3 for Figure 1 the structural schematic diagram of the breathing circuit module 100 shown, Figure 4As Figure 3 shown in the exploded structure diagram of the breathing circuit module 100, Figure 5 As Figure 4 shown in the schematic structural diagram of the first sub-mounting bracket 11.

[0042] The breathing circuit module 100 includes a mounting bracket 10, and a flow meter 20, a gas pipeline 30, and a heater 40 disposed on the mounting bracket 10. The flow meter 20 is configured to detect the flow rate of the gas in the gas pipeline 30, and the heater 40 is configured to non-contact heat the flow meter 20.

[0043] The gas pipeline 30 provided in this application includes an external interface 31, a mounting pipeline 32, and a connecting pipe 34. One end of the mounting pipeline 32 is connected to the external interface 31 and communicates with the external interface 31. The mounting pipeline 32 communicates with other units of the breathing circuit module, such as a carbon dioxide absorption canister, and can transfer the exhaled gas of the patient to other units of the breathing circuit module for purification, or can also transport the purified gas and anesthetic to the patient. The connecting pipe 34 is disposed on the outer peripheral surface of the mounting pipeline 32 and communicates with the mounting pipeline 32. The connecting pipe 34 is configured to communicate with a flexible pipe 205, and transfer the gas in the gas pipeline 30 to the air pressure measuring unit of the host 200 through the flexible pipe 205. Among them, the gas in the breathing circuit module 100 enters the mounting pipeline 32 from the external interface 31, or discharges from the mounting pipeline 32 through the external interface 31 out of the breathing circuit module 100. Exemplarily, the number of the connecting pipes 34 provided on one mounting pipeline 32 can be two, and the two connecting pipes 34 are respectively a first connecting pipe 34A and a second connecting pipe 34B. The first connecting pipe 34A and the second connecting pipe 34B are spaced apart along the axial direction of the mounting pipeline 32.

[0044] In this embodiment, the mounting bracket 10 is generally rectangular. The mounting bracket 10 includes a first sub-mounting bracket 11 and a second sub-mounting bracket 12. Along the thickness direction of the mounting bracket 10, the first sub-mounting bracket 11 and the second sub-mounting bracket 12 are joined together in an opposing manner. The second sub-mounting bracket 12 is provided with an avoidance hole 121, and the avoidance hole 121 penetrates through the second sub-mounting bracket 12 along the thickness direction of the second sub-mounting bracket 12. The avoidance hole 121 is configured to make a docking space for the gas pipeline 30 of the breathing circuit module 100 and the gas path pipeline of the host 200, so as to facilitate a part of the gas pipeline 30 of the breathing circuit module 100 to pass through the avoidance hole 121 and then dock with the flexible pipe 205 of the host 200.

[0045] The gas pipeline 30 is disposed on the mounting frame 10. The mounting pipeline 32 is disposed on one side of the first sub-mounting frame 11 and protrudes from the side surface of the first sub-mounting frame 11. One end of the mounting pipeline 32 protruding from the first sub-mounting frame 11 is connected to the external interface 31. The connecting pipe 34 is disposed on the first sub-mounting frame 11 and passes through the avoidance hole 121 of the second sub-mounting frame 12. The end of the connecting pipe 34 away from the first sub-mounting frame 11 is configured to be connected to the flexible pipe 205. Specifically, the first connecting pipe 34A passes through the avoidance hole 121 and is configured to be connected to the first flexible pipe 205A, and the second connecting pipe 34B passes through the avoidance hole 121 and is configured to be connected to the second flexible pipe 205B.

[0046] Please refer to Figures 6 to 9 , Figure 6 for Figure 4 the exploded view of the flowmeter 20 shown in Figure 7 for Figure 6 the structural schematic diagram of the first sub-joint 212 shown in Figure 8 for Figure 6 the structural schematic diagram of the second sub-joint 213 shown in Figure 9 for Figure 6 the structural schematic diagram of the throttle member 22 shown in

[0047] The flowmeter 20 is installed in the mounting pipeline 32 and is configured to measure the gas flow rate flowing from the external interface 31 to the mounting pipeline 32 or the gas flow rate flowing from the mounting pipeline 32 to the external interface 31. As Figure 6 shown, the flowmeter 20 includes a pipe joint 21 and a throttle member 22. The throttle member 22 is disposed in the pipe joint 21 and is configured to change the airway diameter to block the gas and generate a pressure difference. The throttle member 22 has an air flow channel 221, and the air flow channel 221 penetrates through the throttle member 22. The pipe joint 21 has two sets of sampling channels 211, and the sampling channels 211 penetrate through the pipe wall of the pipe joint 21. The two sets of sampling channels 211 are respectively disposed at opposite ends of the air flow channel 221 of the throttle member 22 and are configured to respectively collect the gas with different pressures before and after the throttle member 22.

[0048] In this embodiment, the outer peripheral surface of the pipe joint 21 further has two sets of buffer grooves 23. The two sets of buffer grooves 23 are spaced apart. One ends of the two sets of sampling channels 211 respectively penetrate through the groove bottom walls of the two sets of buffer grooves 23 (i.e., the outer peripheral surface of the pipe joint 21), so that the two sets of buffer grooves 23 are respectively communicated with the two sets of sampling channels 211. Exemplarily, the buffer groove 23 can be an annular cavity, and one end of the sampling channel 211 can be opened on the groove bottom wall of the buffer groove 23 so as to be communicated with the buffer groove 23, and the other end of the sampling channel 211 is communicated with the air flow channel 221.

[0049] In this embodiment, the pipe joint 21 includes a first sub-joint 212 and a second sub-joint 213. The first sub-joint 212 and the second sub-joint 213 are detachably connected, and the throttle member 22 is arranged between the first sub-joint 212 and the second sub-joint 213. The two groups of sampling channels 211 are respectively a first sampling channel 211A and a second sampling channel 211B, and the two groups of buffer grooves 23 are respectively a first buffer groove 23A and a second buffer groove 23B. The first sampling channel 211A and the first buffer groove 23A are arranged on the first sub-joint 212, and the second sampling channel 211B and the second buffer groove 23B are arranged on the second sub-joint 213.

[0050] As Figure 6 and Figure 7 shown, the first sub-joint 212 includes a first pipe body 2121 and a positioning hole 2122. The positioning hole 2122 is recessed in one end face of the first pipe body 2121 and extends in the direction towards the inside of the first pipe body 2121. Exemplarily, the number of the positioning holes 2122 can be two, and the two positioning holes 2122 are arranged oppositely along the radial direction of the first pipe body 2121. The first sampling channel 211A penetrates through the pipe wall of the first pipe body 2121 along the radial direction of the first pipe body 2121. The first sub-joint 212 further includes a first guiding member 2123. The first guiding member 2123 is arranged inside the first pipe body 2121 and is located on the side of the first sampling channel 211A away from the throttle member 22. One end of the first guiding member 2123 is connected to the inner wall surface of the first pipe body 2121, and the other end extends towards the throttle member 22 and is inclined. The first guiding member 2123 is configured to guide the gas entering the first sub-joint 212 from the end away from the positioning hole 2122 to the first sampling channel 211A and the throttle member 22. It can be understood that the first guiding member 2123 can be an inclined surface or a wedge-shaped block, and the specific shape is not limited.

[0051] As Figure 6 and Figure 8As shown, the second sub-joint 213 includes a second tube body 2131 and a positioning post 2132. The positioning post 2132 is provided on one end face of the second tube body 2131 and extends in a direction away from the second tube body 2131. Exemplarily, the number of the positioning posts 2132 can be two, and the two positioning posts 2132 are oppositely arranged along the radial direction of the second tube body 2131. The second sampling channel 211B penetrates the tube wall of the second tube body 2131 along the radial direction of the second tube body 2131. The second sub-joint 213 further includes a second flow guide member 2133. The second flow guide member 2133 is disposed inside the second tube body 2131 and is located on a side of the second sampling channel 211B away from the throttle member 22. One end of the second flow guide member 2133 is connected to the inner wall surface of the second tube body 2131, and the other end extends and inclines toward the throttle member 22. The second flow guide member 2133 is configured to guide the gas entering the second sub-joint 213 from one end away from the positioning post 2132 to the second sampling channel 211B and the throttle member 22. It can be understood that the second flow guide member 2133 can be an inclined surface or a wedge-shaped block, and the specific shape is not limited.

[0052] As Figure 9 shown, the throttle member 22 is further provided with a limiting hole 222. The limiting hole 222 penetrates the throttle member 22 along the thickness direction of the throttle member 22. The limiting hole 222 is spaced apart from the air flow channel 221. In this embodiment, the throttle member 22 is a circular diaphragm, and the air flow channel 221 is an arc-shaped slit. Among them, the air flow channel 221 can expand as the gas flow rate passing through the throttle member 22 increases and contract as the gas flow rate decreases. In other embodiments, the throttle member 22 and the air flow channel 221 can also be other shapes, and the specific shape is not limited. Exemplarily, the number of the limiting holes 222 can be two, and the two limiting holes 222 are oppositely arranged along the radial direction of the throttle member 22 at the edge of the throttle member 22.

[0053] As Figure 6As shown, one end of the second sub-joint 213 provided with the positioning posts 2132 is butted against one end of the first sub-joint 212 provided with the positioning holes 2122, and the throttle member 22 is located between the first sub-joint 212 and the second sub-joint 213. The two positioning posts 2132 of the second sub-joint 213 respectively pass through the two limiting holes 222 of the throttle member 22 and are inserted into the two positioning holes 2122 of the first sub-joint 212, restricting relative rotation between the first sub-joint 212, the throttle member 22 and the second sub-joint 213, and improving the structural stability of the flowmeter 20. At the same time, the first sub-joint 212, the throttle member 22 and the second sub-joint 213 form a detachable connection relationship, which is convenient for the maintenance and replacement of the flowmeter 20. When the gas flows from the first sub-joint 212 of the flowmeter 20 to the second sub-joint 213, the first flow guiding member 2123 in the first pipe body 2121 can guide the gas to the sampling channel 211 and the throttle member 22; when the gas flows from the second sub-joint 213 of the flowmeter 20 to the first sub-joint 212, the second flow guiding member 2133 in the second pipe body 2131 can guide the gas to the sampling channel 211 and the throttle member 22.

[0054] Please also refer to Figure 10 , Figure 10 is Figure 1 the sectional structure diagram of the anesthetic machine 1000 shown along the A-A direction.

[0055] The flowmeter 20 is installed in the installation pipeline 32. Specifically, one end of the first sub-joint 212 far from the second sub-joint 213 is docked and communicated with the external interface 31. The first sampling channel 211A of the first sub-joint 212 is communicated with the first connecting pipe 34A through the first buffer tank 23A, and the opening of the first sampling channel 211A is arranged in a staggered manner with the opening of the first connecting pipe 34A, so that the gas flowing out of the first sampling channel 211A does not directly rush towards the first connecting pipe 34A, but after being fully mixed and buffered by the first buffer tank 23A, it then leads to the first connecting pipe 34A, improving the smoothness of gas flow; the second sampling channel 211B of the second sub-joint 213 is communicated with the second connecting pipe 34B through the second buffer tank 23B, and the opening of the second sampling channel 211B is arranged in a staggered manner with the opening of the second connecting pipe 34B, so that the gas flowing out of the second sampling channel 211B does not directly rush towards the second connecting pipe 34B, but after being fully mixed and buffered by the second buffer tank 23B, it then leads to the second connecting pipe 34B, improving the smoothness of gas flow. It can be understood that the flowmeter 20 is communicated with the external interface 31 and the connecting pipes 34, and the gas flowing between the external interface 31 and the installation pipeline 32 all flows through the gas flow channel 221 of the throttle member 22. Among them, the first guide member 2123 can guide the gas flowing in from the external interface 31 to the first sampling channel 211A and the throttle member 22, and the second guide member 2133 can guide the gas flowing in the reverse direction, that is, the gas flowing in from the second sub-joint 213, to the second sampling channel 211B and the throttle member. The setting of the guide member helps to reduce the resistance of gas flow in the breathing circuit module 100 and improve the accuracy of sampling and detecting the gas flow. However, the water vapor in the gas flowing through the flowmeter 20 may condense and adhere to the throttle member 22 due to too low temperature, affecting the accuracy of the flowmeter 20 in measuring the gas flow. Therefore, the breathing circuit module 100 provided in this application is provided with a heater 40 to heat the flowmeter 20 to prevent the water vapor in the gas from condensing.

[0056] As Figure 5 shown, the heater 40 can be arranged on the first sub-installation rack 11, and is arranged opposite to and spaced from the installation pipeline 32, and is configured to non-contact heat the flowmeter 20 in the installation pipeline 32. Among them, non-contact heating means that when the heater 40 heats the flowmeter 20, it does not contact the flowmeter 20, nor indirectly contacts the flowmeter 20 through other components for heat conduction.

[0057] In this embodiment, in combination with Figure 5 and Figure 11As shown, the heater 40 includes an electromagnetic wave emission control circuit 42 and an induction coil 41. The electromagnetic wave emission control circuit 42 and the induction coil 41 are electrically connected. The pipe joint 21 is a magnetic conductive member made of magnetic material, such as a magnet. The induction coil 41 is arranged at an interval from the pipe joint 21. After the electromagnetic wave emission control circuit makes alternating current flow through the induction coil, a rapidly changing magnetic field will be generated. When the magnetic force lines of the magnetic field pass through the magnetic conductive pipe joint 21, a large amount of eddy current will be generated in the pipe joint 21. When the eddy current is blocked by the material resistance, a large amount of heat will be generated. Therefore, the heater 40 can non-contact heat the pipe joint 21 of the flowmeter 20 through the principle of electromagnetic induction, thereby raising the temperature of the gas passing through the flowmeter 20 and preventing the gas from condensing due to too low temperature and adhering to the throttle member 22, which affects the accuracy of the gas flow measurement by the flowmeter 20. Exemplarily, the operating frequency of the induction coil should be greater than or equal to 20 KHz to overcome the losses of electromagnetic transmission and turbine emission, and the operating frequency of the induction coil should be less than or equal to 40 KHz to reduce the operating power of the heater 40, save energy and protect the environment, and reduce the thermal impact on the surrounding area.

[0058] In other embodiments, the heater 40 can also be a laser heater 40, and the pipe joint 21 is a heat conductive member. The heater 40 emits laser to the surface of the pipe joint 21, so that a large amount of heat accumulates in the pipe joint 21, raising the temperature of the pipe joint 21. At the same time, the pipe joint 21 is a heat conductive member, that is, a good conductor of heat, and can transfer the accumulated heat to the gas flowing through the pipe joint 21, thereby raising the temperature of the gas passing through the flowmeter 20 and preventing the gas from condensing due to too low temperature and adhering to the throttle member 22, which affects the accuracy of the gas flow measurement by the flowmeter 20.

[0059] The breathing circuit module 100 provided by the present application non-contact heats the flowmeter 20 through the heater 40, reducing the loss of heat during the heat conduction process and improving the heating efficiency. When the total heating power of the heater 40 is greater than or equal to 5 W, it can meet the use requirements of the anesthesia machine 1000. At the same time, the non-contact heater 40 provided by the present application can concentrate and accurately heat the area where the flowmeter 20 is located, avoiding the thermal impact on other areas and maintaining the same physical feeling of the breathing circuit module 100 and the tabletop of the anesthesia machine 1000; finally, non-contact heating omits the connecting heat-conducting wires and the precise alignment installation steps between the heater 40 and the flowmeter 20, reducing the requirement for installation accuracy when disassembling and assembling the breathing circuit module 100 and reducing the assembly difficulty.

[0060] It should be noted that although in this embodiment, the induction coil 41 of the heater 40 is arranged at an interval from the pipe joint 21, and the induction coil 41 heats the pipe joint 21 by non-contact heating, however, the present application does not limit the specific relative position relationship between the pipe joint and the heater, as long as the induction coil is arranged on the outer peripheral side of the pipe joint. For example, in other embodiments, the heating coil or the laser heater may also be in direct contact with the pipe joint.

[0061] In some embodiments, the breathing circuit module 100 further includes a temperature sensor 50. The temperature sensor 50 is opposite to and arranged at an interval from the flowmeter 20, and is configured to measure the temperature of the flowmeter 20 in a non-contact manner. Among them, non-contact temperature measurement means that when the temperature sensor 50 measures the temperature of the flowmeter 20, it does not contact the flowmeter 20, nor indirectly contact the flowmeter 20 through other components. Exemplarily, the non-contact temperature sensor 50 may be a thermal imaging infrared thermometer. More preferably, both the temperature sensor 50 and the heater 40 are electrically connected to the main control module of the host 200. The main control module can dynamically adjust the heating power of the heater 40 according to the temperature data of the flowmeter 20 measured by the temperature sensor 50, so that the temperature of the flowmeter 20 can always be maintained within a required temperature range.

[0062] As Figure 4 and Figure 5 shown, the gas pipeline 30 provided by the present application may include an inhalation pipeline and an exhalation pipeline. The exhalation pipeline is configured to transfer the gas exhaled by the patient to the processing unit of the breathing circuit module 100 for purification, and the inhalation pipeline is configured to deliver the purified gas and anesthetic to the patient. In this embodiment, the number of the external interfaces 31 and the installation pipelines 32 may be two. The two external interfaces 31 are respectively a first external interface 31A and a second external interface 31B, and the two installation pipelines 32 are respectively a first installation pipeline 32A and a second installation pipeline 32B. The exhalation pipeline includes the first external interface 31A and the first installation pipeline 32A, and one end of the first installation pipeline 32A is connected to the first external interface 31A. The inhalation pipeline includes the second external interface 31B and the second installation pipeline 32B, and one end of the second installation pipeline 32B is connected to the second external interface 31B. In this embodiment, the number of the flowmeters 20 may also be two. The two flowmeters 20 are respectively a first flowmeter 20A and a second flowmeter 20B. The first flowmeter 20A is installed in the first installation pipeline 32A, and the second flowmeter 20B is installed in the second installation pipeline 32B. The first flowmeter 20A is configured to measure the flow rate of the gas flowing from the first external interface 31A to the installation pipeline 32, that is, to measure the gas flow rate in the exhalation pipeline; the second flowmeter 20B is configured to measure the flow rate of the gas flowing from the installation pipeline 32 to the second external interface 31B, that is, to measure the gas flow rate in the inhalation pipeline.

[0063] During the process of implementing inhalation anesthesia for a patient, the breathing circuit module 100 of the anesthesia machine 1000 delivers inhaled or returns exhaled gas to the patient. The temperature of the exhaled gas from the patient is 37°C and the relative humidity is 100%. After the exhaled gas enters the exhalation pipeline, affected by the temperature drop, water vapor is likely to condense and adhere to the throttle member 22 of the first flowmeter 20A, resulting in a monitoring deviation of the exhaled gas flow rate by the first flowmeter 20A. Additionally, after the exhaled gas from the patient passes through a processing unit, such as a carbon dioxide absorption tank, water and heat are generated. At this time, after the processed gas is combined with the fresh gas and transported to the inhalation pipeline, it is also affected by the temperature drop and is likely to condense and adhere to the throttle member 22 of the second flowmeter 20B, resulting in a monitoring deviation of the inhaled gas flow rate by the second flowmeter 20B. The breathing circuit module 100 provided in this application solves the problem of the influence of gas condensation on the measurement accuracy of the flowmeter 20 by setting a heater 40 to non-contact heat the first flowmeter 20A and the second flowmeter 20B.

[0064] Specifically, the heater 40 can be arranged between the first installation pipeline 32A and the second installation pipeline 32B. The number of heaters 40 can be two. The two heaters 40 are respectively the first heater 40A and the second heater 40B. The first heater 40A is configured to non-contact heat the first flowmeter 20A, and the second heater 40B is configured to non-contact heat the second flowmeter 20B. In this embodiment, by providing two heaters 40 to separately heat the first flowmeter 20A of the exhalation pipeline and the second flowmeter 20B of the inhalation pipeline respectively, compared with the solution of using a single heater 40 to heat the two flowmeters 20 simultaneously, the flexibility of the layout of the gas pipeline 30 is improved, and the problem that the heating power attenuation of the non-contact heater 40 is too fast due to the excessive distance between the exhalation pipeline and the inhalation pipeline is avoided, ensuring the heating efficiency of the heater 40. In other embodiments, the number of heaters 40 can also be one or more than two, and the specific number is not limited.

[0065] Exemplarily, the first installation pipeline 32A and the second installation pipeline 32B can be arranged side by side and at intervals along the length direction of the first sub-installation frame 11. The first flowmeter 20A and the second flowmeter 20B installed on the installation pipeline 32 can also be arranged side by side and at intervals along the length direction of the first sub-installation frame 11. This makes the layout of the gas pipeline 30 of the breathing circuit module 100 more compact, reduces the space occupied by the gas pipeline 30 in the breathing circuit module 100, and is beneficial to the miniaturization of the breathing circuit module 100.

[0066] Exemplarily, the number of the temperature sensors 50 may also be two. The two temperature sensors 50 are respectively a first temperature sensor 50A and a second temperature sensor 50B. The first temperature sensor 50A is configured to non - contact measure the temperature of the first flowmeter 20A, and the second temperature sensor 50B is configured to non - contact measure the temperature of the second flowmeter 20B.

[0067] Please refer to Figure 11 , Figure 11 as Figure 1 a partial structural schematic diagram of the shown anesthesia machine 1000.

[0068] In this embodiment, the first heater 40A includes a first electromagnetic wave emission control circuit 42A and a first induction coil 41A, and the second heater 40B includes a second electromagnetic wave emission circuit 42B and a second induction coil 41B. The anesthesia machine 1000 further includes a power supply 209. Two input ports of the power supply 209 are respectively electrically connected to the first electromagnetic wave emission control circuit 42A and the second electromagnetic wave emission circuit 42B to provide electrical energy for the first heater 40A and the second heater 40B respectively. The main control module 208 is also electrically connected to the first electromagnetic wave emission control circuit 42A, the second electromagnetic wave emission circuit 42B, the first temperature sensor 50A, and the second temperature sensor 50B. The main control module 208 can dynamically adjust the heating power of the first heater 40A according to the temperature data of the first flowmeter 20A measured by the first temperature sensor 50A, so that the temperature of the first flowmeter 20A can always be maintained within a required temperature range. Similarly, the main control module 208 can dynamically adjust the heating power of the second heater 40B according to the temperature data of the second flowmeter 20B measured by the second temperature sensor 50B, so that the temperature of the second flowmeter 20B can always be maintained within a required temperature range.

[0069] Such as Figure 10As shown in the figure, the breathing circuit module 100 is installed in the accommodation space 204 and connected to the host 200. The connecting pipe 34 of the breathing circuit module 100 is inserted into the flexible pipe 205 provided on the connecting plate 202. In this application, by providing the mutually cooperating connecting pipe 34 and the flexible pipe 205, the sampling channel 211 on the pipe joint 21 of the flowmeter 20 is communicated with the air pressure measuring unit in the host 200. Specifically, the first connecting pipe 34A provided on the first sub-mounting bracket 11 sequentially passes through the avoidance hole 121 of the second sub-mounting bracket 12 and is inserted into the first flexible pipe 205A of the host 200, and the second connecting pipe 34B sequentially passes through the avoidance hole 121 of the second sub-mounting bracket 12 and is inserted into the second flexible pipe 205B of the host 200. The first connecting pipe 34A and the first flexible pipe 205A communicate the first sampling channel 211A of the first sub-joint 212 with the air pressure measuring unit provided in the frame 201, and the second connecting pipe 34B and the second flexible pipe 205B communicate the second sampling channel 211B of the second sub-joint 213 with the air pressure measuring unit. Among them, the air pressure measuring unit can respectively measure the air pressure of the gas before and after the throttle member 22 through the first sampling channel 211A and the second sampling channel 211B provided on both sides of the throttle member 22, and obtain the air pressure difference generated when the gas flows through the throttle member 22, and then convert the air pressure difference to obtain the gas flow rate of the gas flowing through the throttle member 22, that is, the gas flow rate in the gas pipeline 30.

[0070] In this embodiment, the connecting pipe 34 is inserted into the flexible pipe 205 and is in interference fit with the flexible pipe 205. It can be understood that the connecting pipe 34 contacts and presses the inner wall of the flexible pipe 205, so that a static friction force is generated between the outer wall of the connecting pipe 34 and the inner wall of the flexible pipe 205, and relative displacement is not likely to occur. In the embodiment of this application, by providing an interference fit between the connecting pipe 34 and the flexible pipe 205, relative movement between the connecting pipe 34 and the flexible pipe 205 is not likely to occur, thereby improving the stability when the breathing circuit module 100 is connected to the host 200.

[0071] Moreover, both the flexible pipe 205 and the connecting pipe 34 are part of the gas pipeline of the anesthesia machine 1000 provided in this application, realizing the gas flow between the gas pipeline 30 of the breathing circuit module 100 and the air pressure measuring unit, which is convenient for the air pressure measuring unit to monitor the gas flow rate in the gas pipeline 30 of the breathing circuit module 100. Therefore, the flexible pipe 205 and the connecting pipe 34 provided in this application can not only form part of the gas pipeline of the anesthetic, but also cooperate with each other to improve the connection stability between the breathing circuit module 100 and the host 200.

[0072] In some embodiments, the air pressure measurement unit can also be installed in the breathing circuit module 100. Specifically, the air pressure measurement unit can be installed on the first sub-mounting bracket 11 or the second sub-mounting bracket 12 to reduce the distance between the air pressure measurement unit and the flowmeter 20, shorten the gas path from the sampling channel 211 to the air pressure measurement unit, reduce the possibility of gas leakage in the anesthesia machine 1000, and improve the airtightness of the anesthesia machine 1000. More preferably, the air pressure measurement unit can be electrically connected to the main control module of the host 200 to feed back the measured gas flow data in the breathing circuit module 100 to the main control module of the host 200 in real time, so as to facilitate further analysis and regulation by the host 200.

[0073] The above are only some embodiments and implementation manners of the present application. The protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A breathing circuit module, characterized in that, It includes a mounting bracket, as well as a gas pipeline, a flowmeter, and a heater provided on the mounting bracket. The flowmeter is configured to detect the flow rate of the gas passing through the gas pipeline. The flowmeter includes a pipe joint, and the pipe joint is connected to and communicates with the gas pipeline. The heater is disposed at a relative interval with respect to the pipe joint and is configured to heat the pipe joint in a non-contact manner.

2. The breathing circuit module according to claim 1, wherein The pipe joint is a magnetic conductive member, and the heater includes an induction coil.

3. The breathing circuit module according to claim 1, wherein The pipe joint is a heat conductive member, and the heater is a laser heater.

4. The breathing circuit module according to claim 1, wherein The breathing circuit module includes a temperature sensor. The temperature sensor is provided on the mounting bracket. The temperature sensor is disposed at a relative interval with respect to the pipe joint and is configured to measure the temperature of the pipe joint in a non-contact manner.

5. The breathing circuit module according to claim 1, wherein, The gas pipeline includes an inhalation pipeline and an exhalation pipeline. The flowmeter includes a first flowmeter and a second flowmeter. The first flowmeter includes a first pipe joint, and the first pipe joint is connected to the inhalation pipeline. The second flowmeter includes a second pipe joint, and the second pipe joint is connected to the exhalation pipeline; The first pipe joint and the second pipe joint are disposed at an interval. The heater is provided between the first pipe joint and the second pipe joint, and the heater is configured to heat the first pipe joint and the second pipe joint.

6. The breathing circuit module according to any one of claims 1-5, characterized in that, The flowmeter further includes a throttling member. The throttling member is disposed inside the pipe joint. The throttling member has an air flow channel, and the air flow channel penetrates through the throttling member and communicates with the gas pipeline. The pipe joint has two sets of sampling channels, and the sampling channels penetrate through the pipe wall of the pipe joint. The two sets of sampling channels are respectively disposed on both sides of the throttling member along the extension direction of the gas pipeline, and the sampling channels are configured to communicate with a pressure detection unit.

7. The breathing circuit module according to claim 6, characterized in that The pipe joint includes two sub-joints, and the two sub-joints are detachably connected to each other. The two sets of sampling channels are respectively provided on the two sub-joints. The throttling member is disposed between the two sub-joints, and the air flow channel communicates between the two sub-joints.

8. The breathing circuit module according to claim 7, wherein The two sub-joints are respectively a first sub-joint and a second sub-joint. The first sub-joint includes a positioning hole, and the positioning hole is recessed in one end face of the pipe body of the first sub-joint. The second sub-joint includes a positioning post, and the positioning post protrudes from one end face of the pipe body of the second sub-joint. The throttling member includes a limiting hole, and the limiting hole penetrates through the throttling member; the positioning post passes through the limiting hole and is inserted into the positioning hole.

9. The breathing circuit module according to claim 7, wherein, The sub-joint includes a pipe body and a flow guiding member. The sampling channel penetrates through the pipe wall of the pipe body. The flow guiding member is disposed inside the pipe body and is located on the side of the sampling channel away from the throttling member. One end of the flow guiding member is connected to the inner wall surface of the pipe body, and the other end extends and inclines towards the throttling member.

10. A breathing circuit module, characterized in that, It includes a mounting rack, as well as a gas pipeline, a flowmeter, and a heater provided on the mounting rack. The flowmeter is configured to detect the flow rate of the gas passing through the gas pipeline. The flowmeter includes a pipe joint and a throttle member. The throttle member is disposed within the pipe joint. The pipe joint is connected to the gas pipeline and is in communication with the gas pipeline. The pipe joint is a magnetically conductive member. The heater includes an induction coil, and the induction coil is disposed on the outer peripheral side of the pipe joint; The throttle member has an air flow channel. The air flow channel penetrates through the throttle member and is in communication with the gas pipeline. The pipe joint has two sets of sampling channels. The sampling channels penetrate through the pipe wall of the pipe joint, and the two sets of sampling channels are arranged on both sides of the throttle member along the extending direction of the gas pipeline. The sampling channels are configured to be in communication with a pressure detection unit.

11. An anesthetic machine, characterized in that, It includes a breathing circuit module and a host as described in any one of claims 1-10. The breathing circuit module is connected to the host.

12. The anesthesia machine according to claim 11, wherein, The host includes a pressure measurement unit and a flexible tube. The pressure measurement unit is in communication with the flexible tube; The flowmeter further includes a throttle member. The throttle member is disposed within the pipe joint. The throttle member has an air flow channel. The air flow channel penetrates through the throttle member and is in communication with the gas pipeline. The pipe joint has two sets of sampling channels. The sampling channels penetrate through the pipe wall of the pipe joint, and the two sets of sampling channels are arranged on both sides of the throttle member along the extending direction of the gas pipeline; The breathing circuit module further includes a connecting pipe. The connecting pipe is disposed on the mounting rack. The connecting pipe is in communication with the sampling channels, and the connecting pipe is inserted into the flexible tube and is in communication with the flexible tube.

13. The anesthesia machine according to claim 12, wherein, The breathing circuit module includes a temperature sensor. The temperature sensor is relatively spaced from the pipe joint and is configured to non-contact measure the temperature of the pipe joint. The host includes a main control module. The main control module is electrically connected to the heater and the temperature sensor. The main control module is configured to adjust the heating power of the heater according to the temperature measured by the temperature sensor.

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