CN218305773U - Breather valve sweeps subassembly and breathing machine - Google Patents
Breather valve sweeps subassembly and breathing machine Download PDFInfo
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- CN218305773U CN218305773U CN202221343095.3U CN202221343095U CN218305773U CN 218305773 U CN218305773 U CN 218305773U CN 202221343095 U CN202221343095 U CN 202221343095U CN 218305773 U CN218305773 U CN 218305773U
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- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 27
- 238000007664 blowing Methods 0.000 claims abstract description 61
- 238000010926 purge Methods 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims description 81
- 238000001514 detection method Methods 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 38
- 230000037361 pathway Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000241 respiratory effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of breathing equipment, especially, relate to a breather valve sweeps subassembly and breathing machine. The breather valve purging assembly comprises a breather valve and a gas circuit control assembly; the breather valve comprises a valve body and a sensor diaphragm, wherein the sensor diaphragm is arranged in the gas channel to divide the gas channel into a front-section channel and a rear-section channel; the gas path control assembly comprises a first blowing gas path, a second blowing gas path, a first switch valve and a second switch valve, the first blowing gas path is connected between the gas source and the front section channel, and the first blowing gas path conveys gas to the front section channel when the first switch valve is opened so as to purge accumulated water at the front end of the sensor diaphragm; the second gas blowing gas circuit is connected between the gas source and the rear section channel, and the second gas blowing gas circuit conveys gas to the rear section channel when the second switch valve is opened so as to blow accumulated water at the rear end of the sensor diaphragm, avoid the accumulated water on the sensor diaphragm from influencing the accuracy of pressure acquisition, and ensure the accuracy of the flow sensor.
Description
Technical Field
The utility model belongs to the technical field of respiratory equipment, especially, relate to a breather valve sweeps subassembly and breathing machine.
Background
The breathing valve component is an important component of a breathing machine and mainly realizes the functions of pressure control, pressure monitoring, flow monitoring and the like of a patient in an expiration stage. In the gas circuit of present breathing machine, most breather valves adopt differential pressure type flow sensor, can accurate monitoring patient's the volume of breathing in and exhaling, and the reliability is high, this kind of flow sensor simple structure simple to operate, and is with low costs.
However, in the using process, due to the fact that the sensor directly contacts with gas exhaled by a patient, water vapor is contained in the exhaled gas, accumulated water is easily generated on a sensor diaphragm, the accumulated water stays in a breather valve, the accuracy is affected, and the flow sensor is inaccurate in monitoring and even damaged.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the breather valve sweeps subassembly and breathing machine to easily produce ponding on current breather valve middling pressure difference flow sensor's the diaphragm, causes the inaccurate problem of flow sensor monitoring.
In order to solve the above technical problem, an embodiment of the present invention provides a breather valve purging assembly, including a breather valve and a gas circuit control assembly;
the breather valve comprises a valve body and a sensor diaphragm, wherein a gas channel is arranged in the valve body, and the sensor diaphragm is arranged in the gas channel to divide the gas channel into a front-section channel and a rear-section channel;
the air path control assembly comprises a first air blowing air path, a second air blowing air path, a first switch valve and a second switch valve, the first switch valve is used for controlling the first air blowing air path to be connected or disconnected, and the second switch valve is used for controlling the second air blowing air path to be connected or disconnected;
the first blowing gas circuit is connected between a gas source and the front section channel, and can convey gas into the front section channel when the first switch valve is opened so as to blow accumulated water at the front end of the sensor diaphragm;
the second blowing gas circuit is connected between the gas source and the rear section channel, and the second blowing gas circuit can convey gas into the rear section channel when the second switch valve is opened so as to blow accumulated water at the rear end of the sensor diaphragm.
Optionally, the gas circuit control assembly further includes a first pressure detection passage, a second pressure detection passage, a first solenoid valve and a second solenoid valve; the first electromagnetic valve is used for controlling the first pressure detection passage to be communicated or disconnected, and the second electromagnetic valve is used for controlling the second pressure detection passage to be communicated or disconnected;
the first pressure detection passage is connected between a first pressure sensor and the front section channel, the first electromagnetic valve has a first working mode and a second working mode, when the first switch valve is opened, the first electromagnetic valve is in the first working mode, so that the first pressure detection passage is disconnected, and when the first switch valve is closed, the first electromagnetic valve is in the second working mode, so that the first pressure detection passage is communicated with the front section channel to collect the pressure at the front end of the sensor diaphragm;
the second pressure detection passage is connected between a second pressure sensor and the rear section passage, the second electromagnetic valve has a third working mode and a fourth working mode, when the second switch valve is opened, the second electromagnetic valve is in the third working mode, so that the second pressure detection passage is disconnected, when the second switch valve is closed, the second electromagnetic valve is in the fourth working mode, so that the second pressure detection passage can be communicated with the rear section passage to collect the pressure of the rear end of the sensor diaphragm.
Optionally, the breather valve purging assembly further includes a valve seat body, the first switch valve, the second switch valve, the first solenoid valve and the second solenoid valve are mounted on the valve seat body, and the first blowing air passage, the second blowing air passage, the first pressure detection passage and the second pressure detection passage are disposed on the valve seat body;
the valve seat main body is internally provided with a first zero calibration cavity communicated with the outside and a second zero calibration cavity communicated with the outside, when the first electromagnetic valve is in a first working mode, the first pressure sensor is communicated with the outside through the first zero calibration cavity, when the second electromagnetic valve is in a third working mode, the second pressure sensor is communicated with the outside through the second zero calibration cavity.
Optionally, the first pressure detection path includes a first branch, a first connection channel, and a first sensor interface, the first solenoid valve has a first air hole, a second air hole, and a third air hole, the first connection channel is connected between the first sensor interface and the first air hole, the first branch is connected between the front section channel and the second air hole, and the first zeroing chamber is connected to the third air hole;
the second pressure detection passage comprises a second branch, a second connecting passage and a second sensor interface, the second electromagnetic valve is provided with a fourth air hole, a fifth air hole and a sixth air hole, the second connecting passage is connected between the second sensor interface and the fourth air hole, the second branch is connected between the rear section passage and the fifth air hole, and the second zeroing cavity is connected with the sixth air hole.
Optionally, the first purge gas circuit includes a first gas source input interface, a first gas inlet channel, a first gas outlet channel, and a first purge interface, the first gas inlet channel is connected between the first gas source input interface and the gas inlet of the first switch valve, the first gas outlet channel is connected between the gas outlet of the first switch valve and the first purge interface, and the first purge interface is connected to the front-segment channel;
the second blowing gas circuit comprises a second gas source input interface, a second gas inlet channel, a second gas outlet channel and a second purging interface, the second gas inlet channel is connected between the second gas source input interface and the gas inlet of the second switch valve, the second gas outlet channel is connected between the gas outlet of the second switch valve and the second purging interface, and the second purging interface is connected with the rear section channel.
Optionally, the breather valve still includes anterior segment sampling channel and back end sampling channel, the one end of anterior segment sampling channel is provided with first sample connection, first sample connection the first interface that sweeps, the other end of anterior segment sampling channel extends to the anterior segment passageway, the one end of back end sampling channel is provided with the second sample connection, the second sample connection the second interface that sweeps, the other end of back end sampling channel extends to the back end passageway.
Optionally, the breather valve still includes the breather valve seat, the breather valve seat cover is established the outside of valve body, first sample connection with the second sample connection sets up on the breather valve seat.
Optionally, the valve body comprises a front-section valve body and a rear-section valve body, the front-section channel is arranged inside the front-section valve body, the rear-section channel is arranged inside the rear-section valve body, and a third sampling port and a fourth sampling port are arranged on the front-section valve body;
the front section sampling channel comprises a first channel and a second channel, the first channel is arranged on the respiration valve seat, the second channel is arranged on the front section valve body, the third sampling port is connected between the first channel and the second channel, and the first sampling port, the first channel, the third sampling port and the second channel are sequentially connected, so that the first purging port is communicated with the front section channel;
the rear-section sampling channel comprises a third channel and a fourth channel, the third channel is arranged on the breathing valve seat, the fourth channel is arranged on the rear-section valve body, the fourth sampling port is connected between the third channel and the fourth channel, and the second sampling port, the third channel, the fourth sampling port and the fourth channel are sequentially connected, so that the second purging interface is communicated with the rear-section channel.
Optionally, the breather valve further comprises a sealing pad, the sealing pad comprises a sealing pad body, a first sealing plug and a second sealing plug, a first connecting hole and a second connecting hole are formed in the sealing pad body, the first sealing plug is inserted into the first passage, a first hollow passage is formed inside the first sealing plug, the first hollow passage is communicated with the first passage and the first connecting hole, and the third sampling port is inserted into the first connecting hole;
the second sealing plug is inserted in the third channel, a second hollow channel is arranged inside the second sealing plug, the second hollow channel is communicated with the third channel and the second connecting hole, and the fourth sampling port is inserted in the second connecting hole.
On the other hand, the embodiment of the utility model provides a breathing machine, including the breather valve as before sweeps the subassembly.
The embodiment of the utility model provides a among the breather valve sweeps the subassembly, the gas that the air supply provided passes through first gas circuit of blowing is carried the front end of sensor diaphragm sweeps, and the gas that the air supply provided passes through the second gas circuit of blowing is carried the rear end of sensor diaphragm sweeps to avoid ponding on the sensor diaphragm to influence the accuracy of gathering pressure, guarantee flow sensor's accuracy, the breathing machine system can calculate gaseous flow according to the pressure value of gathering.
Drawings
Fig. 1 is a schematic view of a gas circuit control assembly according to an embodiment of the present invention;
fig. 2 is another schematic view of a gas path control assembly according to an embodiment of the present invention;
fig. 3 is a schematic front view of a gas circuit control assembly according to an embodiment of the present invention;
FIG. 4 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 3;
FIG. 5 is a schematic sectional view taken along line B-B in FIG. 3;
fig. 6 is a schematic view of a first zeroing hole and a second zeroing hole provided in an embodiment of the present invention;
fig. 7 is a schematic view of a breather valve according to an embodiment of the present invention;
fig. 8 is a schematic view of a valve body according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. a breather valve;
11. a valve body; 111. a front valve body; 1111. a second channel; 1112. a third sampling port; 1113. a fourth sampling port; 112. a rear valve body; 1121. a fourth channel;
12. a sensor diaphragm;
13. a breather valve seat; 131. a first sampling port; 132. a second sampling port; 133. a first channel;
141. a gasket body; 142. a first sealing plug; 143. a first connection hole; 144. a second connection hole;
2. a gas circuit control assembly;
211. a first air source input interface; 212. a first air intake passage; 213. a first air outlet channel; 214. a first purge interface;
221. a second gas source input interface; 222. a second intake passage; 223. a second air outlet channel; 224. a second purge interface;
23. a first on-off valve;
24. a second on-off valve;
251. a first branch; 252. a first connecting channel; 253. a first sensor interface;
261. a second branch circuit; 262. a second connecting channel; 263. a second sensor interface;
27. a first solenoid valve; 271. a first air hole; 272. a second air hole; 273. a third air hole;
28. a second solenoid valve; 281. a fourth air hole; 282. a fifth air hole; 283. a sixth air hole;
29. a valve seat body; 291. a first zeroing chamber; 2911. a first zero calibration port; 292. a second zeroing cavity; 2921. and a second zeroing port.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to fig. 8, in one aspect, an embodiment of the present invention provides a breather valve purging assembly, which includes a breather valve 1 and an air circuit control assembly 2. Breather valve 1 includes valve body 11 and sensor diaphragm 12, be provided with gas passage in the valve body 11, sensor diaphragm 12 sets up in the gas passage, sensor diaphragm 12 is along the perpendicular to the axial direction setting of gas passage, with will gas passage separates into anterior segment passageway and back end passageway.
The air path control assembly 2 comprises a first air blowing air path, a second air blowing air path, a first switch valve 23 and a second switch valve 24, the first switch valve 23 is used for controlling the connection or disconnection of the first air blowing air path, when the first switch valve 23 is opened, the first air blowing air path is in a connected state and can guide air, and when the first switch valve 23 is closed, the first air blowing air path is in a disconnected state. The second switch valve 24 is used for controlling the second blowing air path to be connected or disconnected, when the second switch valve 24 is opened, the second blowing air path is in a connected state and can guide air, and when the second switch valve 24 is closed, the second blowing air path is in a disconnected state.
The first blowing air path is connected between the air source and the front section channel, and the first blowing air path can convey air to the front section channel when the first switch valve 23 is opened so as to blow accumulated water at the front end of the sensor diaphragm 12, and blow off water drops attached to the front end of the sensor diaphragm 12.
The second air blowing gas circuit is connected between the gas source and the rear section channel, and the second air blowing gas circuit can convey gas to the rear section channel when the second switch valve 24 is opened so as to blow accumulated water at the rear end of the sensor diaphragm 12 and blow off water drops attached to the rear end of the sensor diaphragm 12.
The embodiment of the utility model provides a among the breather valve sweeps the subassembly, the gas that the air supply provided passes through first gas circuit of blowing is carried sensor diaphragm 12's front end sweeps, and the gas that the air supply provided passes through the second gas circuit of blowing is carried sensor diaphragm 12's rear end sweeps to avoid ponding on the sensor diaphragm 12 to influence the accuracy of gathering pressure, guarantee flow sensor's accuracy, the flow that gaseous can be calculated according to the pressure value of gathering to the breathing machine system.
In an embodiment, as shown in fig. 1 and fig. 2, the air passage control assembly 2 further includes a first pressure detection passage, a second pressure detection passage, a first solenoid valve 27 and a second solenoid valve 28, wherein the first solenoid valve 27 is used for controlling the first pressure detection passage to be connected or disconnected, and the second solenoid valve 28 is used for controlling the second pressure detection passage to be connected or disconnected.
The first pressure detection path is connected between a first pressure sensor and the front-end channel, the first solenoid valve 27 has a first working mode and a second working mode, when the first switch valve 23 is opened, the first solenoid valve 27 is in the first working mode, so that the first pressure detection path is disconnected, when the first switch valve 23 is closed, the first solenoid valve 27 is in the second working mode, so that the first pressure detection path is communicated with the front-end channel, so that the first pressure sensor collects the pressure at the front end of the sensor diaphragm 12.
The second pressure detection path is connected between the second pressure sensor and the rear-end passage, the second solenoid valve 28 has a third operating mode and a fourth operating mode, when the second on-off valve 24 is opened, the second solenoid valve 28 is in the third operating mode, so that the second pressure detection path is disconnected, when the second on-off valve 24 is closed, the second solenoid valve 28 is in the fourth operating mode, so that the second pressure detection path can be communicated with the rear-end passage, so that the second pressure sensor collects the pressure at the rear end of the sensor diaphragm 12.
After the first air blowing gas circuit and the second air blowing gas circuit blow water, pressure collection is completed through the first pressure detection circuit and the second pressure detection circuit, in the working process of the breather valve 1, the pressure collection process is continuously carried out, and water blowing needs to be carried out once at certain intervals, such as every 5 minutes, so as to ensure the accuracy of the pressure collection.
In an embodiment, as shown in fig. 1 and fig. 2, the breather valve purging assembly further includes a valve seat body 29, the first switch valve 23, the second switch valve 24, the first solenoid valve 27, and the second solenoid valve 28 are mounted on the valve seat body 29, and the first blowing air path, the second blowing air path, the first pressure detection path, and the second pressure detection path are disposed on the valve seat body 29.
The valve seat main body 29 is provided inside with a first zeroing chamber 291 communicated with the outside and a second zeroing chamber 292 communicated with the outside, when the first solenoid valve 27 is in the first working mode, the first pressure sensor is communicated with the outside through the first zeroing chamber 291, and when the second solenoid valve 28 is in the third working mode, the second pressure sensor is communicated with the outside through the second zeroing chamber 292.
The gas that the air supply provided gets into in the first gas circuit of blowing, when first ooff valve 23 was opened, the first gas circuit of blowing can lead gas to in the anterior segment passageway, gas can flow to the front end of sensor diaphragm 12 blows off and is attached to the drop of water on the sensor diaphragm 12 front end. At this time, when the first solenoid valve 27 is in the first operation mode, the first pressure detection path is in a disconnected state, the first pressure sensor can be connected to the first zero calibration chamber 291 through the first solenoid valve 27, and then communicate with the outside, and the first pressure sensor starts zero calibration. When the first switch valve 23 is closed, the first blowing gas path is in a disconnected state, gas cannot flow into the front section passage, the first solenoid valve 27 is switched from a first working mode to a second working mode, and the first pressure sensor can acquire the pressure at the front end of the sensor diaphragm 12 through the first pressure detection passage.
The process of acquiring the water blowing pressure at the rear end of the sensor diaphragm 12 is basically the same as the process of acquiring the water blowing pressure at the front end of the sensor diaphragm 12, gas provided by a gas source can also enter the second air blowing gas path, when the second switch valve 24 is opened, the second air blowing gas path can guide the gas to the rear section channel, and the gas can flow to the rear end of the sensor diaphragm 12 to blow off water drops attached to the rear end of the sensor diaphragm 12. At this time, when the second solenoid valve 28 is in the third operation mode, the second pressure detection path is in a disconnected state, the second pressure sensor can communicate with the outside by connecting to the second zeroing chamber 292 through the second solenoid valve 28, and the second pressure sensor starts zeroing. When the second switch valve 24 is closed, the second blowing air path is in a disconnected state, air cannot flow into the rear-section channel, the second electromagnetic valve 28 is switched from the third working mode to the fourth working mode, and the second pressure sensor can acquire the pressure at the rear end of the sensor diaphragm 12 through the second pressure detection path.
Preferably, as shown in fig. 6, the first zeroing chamber 291 and the second zeroing chamber 292 are chambers disposed inside the valve seat body 29, the first zeroing chamber 291 has a first zeroing port 2911 exposed from a surface of the valve seat body 29, the first pressure sensor can perform zeroing through the first zeroing port 2911, the second zeroing chamber 292 has a second zeroing port 2921 exposed from the surface of the valve seat body 29, and the second pressure sensor can perform zeroing through the second zeroing port 2921.
In one embodiment, as shown in fig. 1 and 2, the first pressure detection passage includes a first branch 251, a first connection channel 252, and a first sensor interface 253, the first sensor interface 253 is disposed at one end of the first connection channel 252 far from the first solenoid valve 27, the first sensor interface 253 is mounted on an outer surface of the valve seat body 29, and the first branch 251 and the first connection channel 252 are disposed inside the valve seat body 29.
As shown in fig. 4, the first solenoid valve 27 has a first air hole 271, a second air hole 272 and a third air hole 273, the first connecting channel 252 is connected between the first sensor interface 253 and the first air hole 271, the first branch 251 is connected between the front channel and the second air hole 272, and the first zero calibration chamber 291 is connected to the third air hole 273. When the first solenoid valve 27 is in the first operation mode, the first air hole 271 and the third air hole 273 are communicated, and the first pressure sensor is communicated with the outside through the first sensor interface 253, the first connection channel 252, the first air hole 271, the third air hole 273, the first zero calibration cavity 291, and the first zero calibration port 2911, so as to implement zero calibration of the first pressure sensor.
When the first electromagnetic valve 27 is in the second working mode, the first air hole 271 is communicated with the second air hole 272, the first pressure sensor is sequentially connected with the first branch 251 through the first sensor interface 253, the first connecting channel 252, the first air hole 271, the second air hole 272 and the first air hole 271, and the first branch 251 is communicated with the front-end channel, so that the first pressure sensor collects the pressure at the front end of the sensor diaphragm 12.
As shown in fig. 1 and 2, the second pressure detection passage includes a second branch 261, a second connection passage 262, and a second sensor port 263, the second sensor port 263 is disposed at an end of the second connection passage 262 remote from the second solenoid valve 28, the second sensor port 263 is mounted on an outer surface of the valve seat body 29, and the second branch 261 and the second connection passage 262 are disposed inside the valve seat body 29.
As shown in fig. 5, the second solenoid valve 28 has a fourth air vent 281, a fifth air vent 282, and a sixth air vent 283, the second connecting channel 262 is connected between the second sensor port 263 and the fourth air vent 281, the second branch 261 is connected between the rear-stage channel and the fifth air vent 282, and the second zeroing chamber 292 is connected to the sixth air vent 283. When the second electromagnetic valve 28 is in the third operation mode, the fourth air hole 281 is communicated with the sixth air hole 283, and the second pressure sensor is sequentially connected to the outside through the second sensor interface 263, the second connecting channel 262, the fourth air hole 281, the sixth air hole 283, the second zeroing chamber 292, and the second zeroing port 2921, so that zeroing of the second pressure sensor is realized.
When the second solenoid valve 28 is in the fourth operating mode, the fourth air hole 281 and the fifth air hole 282 are communicated, the second pressure sensor is sequentially connected via the second sensor interface 263, the second connecting channel 262, the fourth air hole 281, the fifth air hole 282 and the second branch 261, and the second branch 261 is communicated with the rear-stage channel, so that the second pressure sensor acquires the pressure at the rear end of the sensor diaphragm 12.
In an embodiment, as shown in fig. 1 and fig. 2, the first blowing gas circuit includes a first gas source input interface 211, a first gas inlet channel 212, a first gas outlet channel 213 and a first blowing interface 214, the first gas source input interface 211 is disposed at an end of the first gas inlet channel 212 far from the first on-off valve 23, the first blowing interface 214 is disposed at an end of the first gas outlet channel 213 far from the first on-off valve 23, the first gas source input interface 211 and the first blowing interface 214 are mounted on a surface of the valve seat main body 29, and the first gas inlet channel 212 and the first gas outlet channel 213 are disposed inside the valve seat main body 29.
The first air inlet channel 212 is connected between the first air source input interface 211 and the air inlet of the first switch valve 23, the first air outlet channel 213 is connected between the air outlet of the first switch valve 23 and the first purge interface 214, and the first purge interface 214 is connected with the front section channel. The gas provided by the gas source enters the first gas inlet channel 212 through the first gas source input interface 211, when the first switch valve 23 is in the open state, the gas inlet and the gas outlet of the first gas inlet channel 212 are communicated, the first gas outlet channel 213 is communicated with the first gas inlet channel 212 through the first switch valve 23, and the gas is blown out from the first purge interface 214 and enters the front section channel. When the first on-off valve 23 is in the closed state, the first inlet channel 212 cannot deliver gas into the first outlet channel 213, and blowing of the front end of the sensor diaphragm 12 is stopped.
In an embodiment, as shown in fig. 1 and fig. 2, the first branch 251 and the first gas outlet channel 213 are cross-connected, the first purge port 214 is disposed at a connection position of the first branch 251 and the first gas outlet channel 213, and the first branch 251 is connected to the front-stage channel through the first purge port 214.
The second blowing air path comprises a second air source input interface 221, a second air inlet channel 222, a second air outlet channel 223 and a second purging interface 224, the second air source input interface 221 is arranged at one end of the second air inlet channel 222 far away from the second switch valve 24, the second purging interface 224 is arranged at one end of the second air outlet channel 223 far away from the second switch valve 24, the second air source input interface 221 and the second purging interface 224 are installed on the surface of the valve seat main body 29, and the second air inlet channel 222 and the second air outlet channel 223 are arranged inside the valve seat main body 29.
The second air inlet channel 222 is connected between the second air source input interface 221 and the air inlet of the second switch valve 24, the second air outlet channel 223 is connected between the air outlet of the second switch valve 24 and the second purging interface 224, and the second purging interface 224 is connected with the rear-stage channel. The gas provided by the gas source enters the second gas inlet channel 222 through the second gas source input interface 221, when the second switch valve 24 is in the open state, the gas inlet and the gas outlet of the second gas inlet channel 222 are communicated, the second gas outlet channel 223 is communicated with the second gas inlet channel 222 through the second switch valve 24, and the gas is blown out from the second purge interface 224 and enters the rear-stage channel. When the second on-off valve 24 is in the closed state, the second inlet passage 222 cannot deliver gas to the second outlet passage 223, and blowing of the gas to the rear end of the sensor diaphragm 12 is stopped.
In an embodiment, the second branch 261 and the second outlet passage 223 are cross-connected, the second purge interface 224 is disposed at a connection of the second branch 261 and the second outlet passage 223, and the second branch 261 is connected to the back-stage passage through the second purge interface 224.
In an embodiment, as shown in fig. 7 and 8, the breather valve 1 further includes a front sampling channel and a rear sampling channel, one end of the front sampling channel is provided with a first sampling port 131, the first sampling port 131 is connected to the first purge port 214, the other end of the front sampling channel extends to the front sampling channel, and the first purge air path is communicated with the front sampling channel. One end of back end sampling passageway is provided with second sample connection 132, second sample connection 132 the second sweeps interface 224, the other end of back end sampling passageway extends to the back end passageway, the second gas blowing gas circuit via back end sampling passageway intercommunication the back end passageway.
In an embodiment, as shown in fig. 7, the respiration valve 1 further includes a respiration valve seat 13, the respiration valve seat 13 is sleeved on an outer side of the valve body 11, and the first sampling port 131 and the second sampling port 132 are disposed on the respiration valve seat 13.
In an embodiment, as shown in fig. 4, the valve body 11 includes a front valve body 111 and a rear valve body 112, the front passage is disposed inside the front valve body 111, the rear passage is disposed inside the rear valve body 112, the sensor diaphragm 12 is installed at a connection position of the front valve body 111 and the rear valve body 112, and the front valve body 111 is provided with a third sampling port 1112 and a fourth sampling port 1113.
As shown in fig. 7 and 8, the front-stage sampling channel includes a first channel 133 and a second channel 1111, the first channel 133 is disposed on the respiration valve seat 13, the second channel 1111 is disposed on the front-stage valve body 111, the first sampling port 131 and the third sampling port 1112 are respectively disposed at two ends of the first channel 133, the third sampling port 1112 is connected between the first channel 133 and the second channel 1111, and the first sampling port 131, the first channel 133, the third sampling port 1112, and the second channel 1111 are connected in sequence, so that the first purge port 214 communicates with the front-stage sampling channel via the front-stage sampling channel.
The rear sampling channel includes a third channel (not shown in the drawings) and a fourth channel 1121, the third channel is disposed on the breathing valve seat 13, the fourth channel 1121 is disposed on the rear valve body 112, the second sampling port 132 and the fourth sampling port 1113 are respectively disposed at two ends of the third channel, the fourth sampling port 1113 is connected between the third channel and the fourth channel 1121, and the second sampling port 132, the third channel, the fourth sampling port 1113 and the fourth channel 1121 are sequentially connected, so that the second purge port 224 is communicated with the rear channel via the rear sampling channel.
In one embodiment, as shown in fig. 8, the third sampling port 1112 and the fourth sampling port 1113 are disposed at one end of the front valve body 111 close to the rear valve body 112, the second channel 1111 extends from the third sampling port 1112 to the front valve body 111 in an inclined manner, the fourth channel 1121 extends from the fourth sampling port 1113 to the rear valve body 112 in an inclined manner, the second channel 1111 is in a shape inclined to the lower right, and the fourth channel 1121 is in a shape inclined to the lower left.
In an embodiment, as shown in fig. 7, the breather valve 1 further includes a sealing pad, the sealing pad includes a sealing pad body 141, a first sealing plug 142 and a second sealing plug (not shown in the figure), the first sealing plug 142 and the second sealing plug are mounted on the sealing pad body 141, a first connecting hole 143 and a second connecting hole 144 are provided on the sealing pad body 141, the first sealing plug 142 is inserted into the first passage 133, a first hollow passage is provided inside the first sealing plug 142, the first hollow passage is connected to the first passage 133 and the first connecting hole 143, the third sampling port 1112 is inserted into the first connecting hole 143, and the first sealing plug 142 and the first connecting hole 143 are sequentially connected between the first passage 133 and the second passage 1111, so as to achieve a sealing connection at a connection between the first passage 133 and the second passage 1111, and ensure that no air leakage occurs when air is blown into the front passage.
The second sealing plug is inserted in the third channel, a second hollow channel is arranged inside the second sealing plug, the second hollow channel is communicated with the third channel and the second connecting hole 144, the fourth sampling port 1113 is inserted in the second connecting hole 144, and the second sealing plug and the second connecting hole 144 are sequentially connected between the third channel and the fourth channel 1121, so that the sealing connection of the connecting part of the third channel and the fourth channel 1121 is realized, and air leakage is avoided when air is blown into the rear section channel.
In another aspect, an embodiment of the present invention provides a ventilator, including the breather valve purging assembly as described above.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A breather valve purging assembly is characterized by comprising a breather valve and a gas circuit control assembly;
the breather valve comprises a valve body and a sensor diaphragm, wherein a gas channel is arranged in the valve body, and the sensor diaphragm is arranged in the gas channel to divide the gas channel into a front-section channel and a rear-section channel;
the air path control assembly comprises a first air blowing air path, a second air blowing air path, a first switch valve and a second switch valve, the first switch valve is used for controlling the first air blowing air path to be connected or disconnected, and the second switch valve is used for controlling the second air blowing air path to be connected or disconnected;
the first blowing gas circuit is connected between a gas source and the front section channel, and can convey gas into the front section channel when the first switch valve is opened so as to blow accumulated water at the front end of the sensor diaphragm;
the second air blowing gas circuit is connected between the gas source and the rear section channel, and the second air blowing gas circuit can convey gas to the rear section channel when the second switch valve is opened so as to blow accumulated water at the rear end of the sensor diaphragm.
2. The breathing valve purge assembly as claimed in claim 1, wherein the pneumatic circuit control assembly further comprises a first pressure sensing passage, a second pressure sensing passage, a first solenoid valve and a second solenoid valve; the first electromagnetic valve is used for controlling the first pressure detection passage to be communicated or disconnected, and the second electromagnetic valve is used for controlling the second pressure detection passage to be communicated or disconnected;
the first pressure detection passage is connected between a first pressure sensor and the front section channel, the first electromagnetic valve has a first working mode and a second working mode, when the first switch valve is opened, the first electromagnetic valve is in the first working mode, so that the first pressure detection passage is disconnected, and when the first switch valve is closed, the first electromagnetic valve is in the second working mode, so that the first pressure detection passage is communicated with the front section channel to collect the pressure at the front end of the sensor diaphragm;
the second pressure detection passage is connected between a second pressure sensor and the rear section passage, the second electromagnetic valve has a third working mode and a fourth working mode, when the second switch valve is opened, the second electromagnetic valve is in the third working mode, so that the second pressure detection passage is disconnected, when the second switch valve is closed, the second electromagnetic valve is in the fourth working mode, so that the second pressure detection passage can be communicated with the rear section passage to collect the pressure of the rear end of the sensor diaphragm.
3. The breather valve purge assembly of claim 2, further comprising a valve seat body, the first and second on-off valves, the first and second solenoid valves being mounted on the valve seat body, the first and second insufflation pathway being disposed on the valve seat body;
the valve seat main part is internally provided with a first zero calibration cavity communicated with the outside and a second zero calibration cavity communicated with the outside, when the first electromagnetic valve is in a first working mode, the first pressure sensor is communicated with the outside through the first zero calibration cavity, when the second electromagnetic valve is in a third working mode, the second pressure sensor is communicated with the outside through the second zero calibration cavity.
4. The breather valve purge assembly of claim 3, wherein the first pressure sensing passageway comprises a first branch, a first connecting passage, and a first sensor port, the first solenoid valve having a first vent, a second vent, and a third vent, the first connecting passage connected between the first sensor port and the first vent, the first branch connected between the forward section passage and the second vent, the first zeroing chamber connected to the third vent;
the second pressure detection passage comprises a second branch, a second connecting passage and a second sensor interface, the second electromagnetic valve is provided with a fourth air hole, a fifth air hole and a sixth air hole, the second connecting passage is connected between the second sensor interface and the fourth air hole, the second branch is connected between the rear section passage and the fifth air hole, and the second zeroing cavity is connected with the sixth air hole.
5. The breather valve purge assembly of claim 1, wherein the first purge gas circuit comprises a first gas source input port, a first gas inlet passageway, a first gas outlet passageway, and a first purge port, the first gas inlet passageway is connected between the first gas source input port and the gas inlet of the first on-off valve, the first gas outlet passageway is connected between the gas outlet of the first on-off valve and the first purge port, and the first purge port is connected with the front segment passageway;
the second blowing gas path comprises a second gas source input interface, a second gas inlet channel, a second gas outlet channel and a second purging interface, the second gas inlet channel is connected between the second gas source input interface and the gas inlet of the second switch valve, the second gas outlet channel is connected between the gas outlet of the second switch valve and the second purging interface, and the second purging interface is connected with the rear section channel.
6. The breather valve purging assembly according to claim 5, wherein the breather valve further comprises a front section sampling channel and a rear section sampling channel, one end of the front section sampling channel is provided with a first sampling port, the first sampling port is connected with the first purging port, the other end of the front section sampling channel extends to the front section channel, one end of the rear section sampling channel is provided with a second sampling port, the second sampling port is connected with the second purging port, and the other end of the rear section sampling channel extends to the rear section channel.
7. The breather valve purge assembly of claim 6, wherein the breather valve further comprises a breather valve seat disposed about an exterior side of the valve body, the first and second sampling ports being disposed on the breather valve seat.
8. The breather valve purging assembly of claim 7, wherein the valve body comprises a front valve body and a rear valve body, the front passage is disposed inside the front valve body, the rear passage is disposed inside the rear valve body, and the front valve body is provided with a third sampling port and a fourth sampling port;
the front section sampling channel comprises a first channel and a second channel, the first channel is arranged on the breathing valve seat, the second channel is arranged on the front section valve body, the third sampling port is connected between the first channel and the second channel, and the first sampling port, the first channel, the third sampling port and the second channel are sequentially connected, so that the first purging interface is communicated with the front section channel;
the rear-section sampling channel comprises a third channel and a fourth channel, the third channel is arranged on the breather valve seat, the fourth channel is arranged on the rear-section valve body, the fourth sampling port is connected between the third channel and the fourth channel, and the second sampling port, the third channel, the fourth sampling port and the fourth channel are sequentially connected, so that the second purging interface is communicated with the rear-section channel.
9. The breather valve purging assembly of claim 8, wherein the breather valve further comprises a sealing gasket, the sealing gasket comprises a sealing gasket body, a first sealing plug and a second sealing plug, the sealing gasket body is provided with a first connecting hole and a second connecting hole, the first sealing plug is inserted into the first passage, a first hollow passage is arranged inside the first sealing plug, the first hollow passage is communicated with the first passage and the first connecting hole, and the third sampling port is inserted into the first connecting hole;
the second sealing plug is inserted in the third channel, a second hollow channel is arranged inside the second sealing plug, the second hollow channel is communicated with the third channel and the second connecting hole, and the fourth sampling port is inserted in the second connecting hole.
10. A ventilator comprising the breather valve purge assembly of any of claims 1-9.
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| CN202221343095.3U CN218305773U (en) | 2022-05-30 | 2022-05-30 | Breather valve sweeps subassembly and breathing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117160354A (en) * | 2023-10-25 | 2023-12-05 | 北京航天长峰股份有限公司 | Air-oxygen mixing device and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117160354A (en) * | 2023-10-25 | 2023-12-05 | 北京航天长峰股份有限公司 | Air-oxygen mixing device and control method thereof |
| CN117160354B (en) * | 2023-10-25 | 2024-02-06 | 北京航天长峰股份有限公司 | Air-oxygen mixing device and control method thereof |
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Address after: 518000, Building 1, 101, Evergrande Fashion Huigu Building, Fulong Road, Shanghenglang Community, Dalang Street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Security Medical Technology Co.,Ltd. Country or region after: China Address before: A1302, Shenzhen national engineering laboratory building, No.20, Gaoxin South 7th Road, high tech Zone community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: Shenzhen Security Medical Technology Co.,Ltd. Country or region before: China |