Suction valve and breathing machine

Abstract

The utility model discloses a suction valve and a breathing machine. The suction valve comprises an electromagnetic valve, a suction valve body, a gas circuit module and a safety valve. The suction valve body comprises a mounting seat, an air inlet passage and a valve port sealing piece; the installation seat and the suction valve body are integrally formed, one end of the air inlet channel is communicated with the air inlet, the valve port sealing piece abuts against the other end in the air inlet channel, a valve body air outlet is formed in one side of a cavity of the suction valve body, and a first air cavity is formed among the inner cavity wall of the suction valve body, the valve body air outlet and the one-way valve. A safety valve is installed on a suction valve of an airway of the breathing machine, a bypass air path is added, air enters the airway from the bypass air path through opening and closing of the safety valve, the air pressure in the airway is balanced when the pressure in the airway is too high, and it is guaranteed that the pressure of the conveyed air is within the safety range; air enters the air path through the safety valve ventilation branch to supplement air in the air path, so that sufficient air is ensured to pass through the lung of the patient, and the suffocation risk is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilators, in particular to an inhalation valve and a ventilator. Background Art

[0002] A ventilator is a device that can replace, control or change a person's normal physiological breathing. It is often used to increase the patient's lung ventilation, improve the patient's respiratory function, reduce respiratory power consumption, and save the patient's heart reserve capacity. The inhalation valve is an essential component of the ventilator, serving as an interface for providing an inhalation air source for the patient's inhalation. The upstream of the inhalation valve is often connected to the inhalation flow control system, and the downstream is connected to the respiratory equipment.

[0003] The inhalation valve usually also has a safety valve, but currently only a safety valve is provided for releasing pressure. When the ventilator fails or the air path is blocked, causing the pressure in the inhalation valve to exceed a certain value, the pressure is relieved through the safety valve. When the electronic valve fails and the inhalation valve cannot ventilate, or the fan fails and the airway pressure is lower than a certain value, the pressure cannot be replenished, which can easily cause insufficient air supply to the user and lead to the risk of suffocation, reducing the safety of the ventilator. Utility Model Content

[0004] The utility model aims to provide an inhalation valve and a ventilator to solve the problem that the existing ventilator uses a safety valve to release pressure but cannot supplement the pressure to balance the internal gas circuit when the pressure is too low.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A suction valve comprises a solenoid valve 2, a suction valve body 3, an air path module 4 and a safety valve 5; the suction valve body 3 comprises a mounting seat 31, an air inlet duct 32 and a valve port seal 33; the mounting seat 31 and the suction valve body 3 are integrally formed, one end of the air inlet duct 32 is connected to the air inlet 1, the valve port seal 33 is against the other end in the air inlet duct 32, a valve body air outlet 37 is opened on one side of the cavity of the suction valve body 3, and a first air cavity 34 is formed between the inner cavity wall of the suction valve body 3, the valve body air outlet 37 and the one-way valve 44.

[0007] The air path module 4 includes a shell 41, a valve cover 42, a one-way valve 44, a pin fixing seat 45, a one-way valve fixing seat 46, a filter cotton 47 and an air outlet end 43. The shell 41 is connected to the mounting seat 31. The pin fixing seat 45 and the one-way valve 44 form a second air cavity 48. One end of the one-way valve fixing seat 46 is sleeved on the one-way valve 44 and sealed, and the other end is connected to the air outlet end 43. The pin fixing seat 45 can also be omitted, and the air cavity formed by the one-way valve 44 and the one-way valve fixing seat 46 can be used as the second air cavity 48.

[0008] The safety valve 5 includes a safety valve stem 51, a safety valve sealing seat 52, a slider 53, a spring 54 and a limit pin 55; a third air cavity 57 is formed between the mounting seat 31 and the one-way valve 44, the safety valve sealing seat 52 and the slider 53, the safety valve sealing seat 52 is arranged in the safety valve sealing seat mounting seat 442, one end of the slider 53 is arranged in the safety valve sealing seat 52, and the other end is installed with a limit pin 55, one end of the safety valve stem 51 is connected to the safety valve 5, and the other end penetrates into the third air cavity 57 through the through hole 311 and can be against the slider 53.

[0009] The gas circuit module 4 may also not use the pin fixing seat 45 , and the limit pin 55 is directly fixed on the one-way valve fixing seat 46 , and the one-way valve 44 and the one-way valve fixing seat 46 directly form the second air cavity 48 .

[0010] The limit pin 55 is fixedly installed on the pin fixing seat 45, and a spring 54 is arranged on the outer sleeve of the limit pin 55. One end of the spring 54 is against the pin fixing seat 45, and the other end is fixed on the slider 53. A cavity matching the limit pin 55 is opened inside the slider 53. The slider 53 can be sleeved on the limit pin 55 and slide along the direction of the limit pin 55.

[0011] A sealing member 531 is also provided on the outside of the slider 53, and the sealing member 531 is pressed against the safety valve sealing seat 52 to achieve sealing between the second air cavity 48 and the third air cavity 57. When the slider 53 slides along the direction of the limit pin 55, the sealing member 531 provided on the outside of the slider 53 also slides accordingly, and the second air cavity 48 and the third air cavity 57 are connected.

[0012] The housing 41 is provided with a mounting slot 411, the valve cover 42 is provided with a stopper 421 corresponding to the mounting slot 411, and the valve cover 42 is also provided with a plurality of air-permeable grilles 422; the one-way valve 44 is provided with a flange 443, one end of which penetrates into the interior of the valve body air outlet 37. When the spring 54 is compressed by the safety valve stem 51 squeezing the slider 53, the slider 53 and the sealing member 531 are separated from the safety valve sealing seat 52, and the gas can enter the second air cavity 48 from the air-permeable grille 422 and then the third air cavity to balance the air path pressure.

[0013] The one-way valve 44 is provided with a one-way diaphragm 441, and the filter cotton 47 is arranged between the valve cover 42 and the one-way valve fixing seat 46. A through hole is opened in the middle of the filter cotton 47, and the air outlet end 43 passes through the filter cotton 47. The one-way diaphragm 441 can limit the gas to pass only in one direction.

[0014] The solenoid valve 2 is provided with a solenoid valve stem 21, and the solenoid valve stem 21 is arranged in a valve stem sealing sleeve 22, and the valve stem sealing sleeve 22 is arranged in the air intake duct 32. The solenoid valve 2 controls the connection and closing of the air inlet 1 and the second air cavity 48 by controlling the solenoid valve stem 21, thereby realizing the delivery and cutoff of gas.

[0015] The suction valve body 3 is provided with a first pressure collection port 35 and a second pressure collection port 36, and the air inlet 1 is provided with a flow meter 11, which is used to monitor the gas flow entering from the air inlet. The gas flows to the pressure detection device through the first pressure collection port 35 and the second pressure collection port 36 to detect the gas pressure and ensure that the gas is delivered to the user at a pressure value within a range.

[0016] A ventilator comprises the above-mentioned inhalation valve.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] A safety valve is installed on the inhalation valve of the ventilator airway, and a side branch airway is added. By switching the safety valve, gas enters the airway from the side branch airway. When the pressure in the airway is too high, the air pressure in the airway is balanced to ensure that the pressure of the delivered gas is within a safe range. When the airway pressure is lower than the limit, air enters the airway through the ventilation branch of the safety valve to replenish the gas in the airway, so as to ensure that there is sufficient gas passage to the patient's lungs to avoid the risk of suffocation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model

[0020] Figure 2 This is one of the schematic diagrams of the split structure of the utility model;

[0021] Figure 3 This is the second schematic diagram of the split structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the disassembled structure of the safety valve of the utility model;

[0024] Figure 6 It is a schematic diagram of the overall structure of the safety valve of the utility model;

[0025] Figure 7 It is a partial structural schematic diagram of the safety valve of the utility model;

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure in the AA direction in the figure of the present utility model;

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure in the BB direction of the figure of the present utility model;

[0028] Fig.10 It is a schematic diagram of the CC direction cross-sectional structure and internal gas path direction of the utility model;

[0029] Fig.11 This is a schematic diagram of the direction of the side branch gas path of the utility model;

[0030] Fig.12 This is a simplified control diagram of the ventilator safety valve of the utility model.

[0031] In the figure: 1, air inlet; 11, flow meter; 2, solenoid valve; 21, solenoid valve stem; 22, valve stem sealing sleeve; 3, suction valve body; 31, mounting seat; 311, through hole; 32, air inlet duct; 33, valve port sealing member; 34, first air cavity; 35, first pressure collection port; 36, second pressure collection port; 37, valve body air outlet; 4, air path module; 41, housing; 411, mounting slot; 42, valve cover; 421, limit block; 42 2. Air-permeable grille; 43. Air outlet; 44. One-way valve; 441. One-way diaphragm; 442. Safety valve sealing seat mounting seat; 443. Flange; 45. Pin fixing seat; 46. One-way valve fixing seat; 47. Filter cotton; 48. Second air cavity; 5. Safety valve; 51. Safety valve stem; 52. Safety valve sealing seat; 53. Slider; 531. Seal; 54. Spring; 55. Limit pin; 56. Safety valve ventilation cavity; 57. Third air cavity. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] A suction valve, characterized in that it includes a solenoid valve 2, a suction valve body 3, an air path module 4 and a safety valve 5; the suction valve body 3 includes a mounting seat 31, an air inlet duct 32 and a valve port seal 33; the mounting seat 31 and the suction valve body 3 are integrally formed, one end of the air inlet duct 32 is connected to the air inlet 1, the valve port seal 33 is against the other end in the air inlet duct 32, a valve body air outlet 37 is opened on one side of the cavity of the suction valve body 3, and a first air cavity 34 is formed between the inner cavity wall of the suction valve body 3, the valve body air outlet 37 and the one-way valve 44.

[0034] The air path module 4 includes a shell 41, a valve cover 42, a one-way valve 44, a pin fixing seat 45, a one-way valve fixing seat 46, a filter cotton 47 and an air outlet end 43. The shell 41 is connected to the mounting seat 31. The pin fixing seat 45 and the one-way valve 44 form a second air cavity 48. One end of the one-way valve fixing seat 46 is sleeved on the one-way valve 44 and sealed, and the other end is connected to the outlet end 43. The pin fixing seat 45 can also be omitted, and the air cavity formed by the one-way valve 44 and the one-way valve fixing seat 46 can be used as the second air cavity 48.

[0035] The safety valve 5 includes a safety valve stem 51, a safety valve sealing seat 52, a slider 53, a spring 54 and a limit pin 55; a third air cavity 57 is formed between the mounting seat 31 and the one-way valve 44, the safety valve sealing seat 52 and the slider 53, the safety valve sealing seat 52 is arranged in the safety valve sealing seat mounting seat 442, one end of the slider 53 is arranged in the safety valve sealing seat 52, and the other end is installed with a limit pin 55, one end of the safety valve stem 51 is connected to the safety valve 5, and the other end penetrates into the third air cavity 57 through the through hole 311 and can be against the slider 53.

[0036] The gas circuit module 4 may also not use the pin fixing seat 45 , and the limit pin 55 is directly fixed on the one-way valve fixing seat 46 , and the one-way valve 44 and the one-way valve fixing seat 46 directly form the second air cavity 48 .

[0037] The limit pin 55 is fixedly installed on the pin fixing seat 45, and a spring 54 is arranged on the outer sleeve of the limit pin 55. One end of the spring 54 is against the pin fixing seat 45, and the other end is fixed on the slider 53. A cavity matching the limit pin 55 is opened inside the slider 53. The slider 53 can be sleeved on the limit pin 55 and slide along the direction of the limit pin 55.

[0038] A sealing member 531 is also provided on the outside of the slider 53, and the sealing member 531 is pressed against the safety valve sealing seat 52 to achieve sealing between the second air cavity 48 and the third air cavity 57. When the slider 53 slides along the direction of the limit pin 55, the sealing member 531 provided on the outside of the slider 53 also slides accordingly, and the second air cavity 48 and the third air cavity 57 are connected.

[0039] The housing 41 is provided with a mounting slot 411, the valve cover 42 is provided with a stopper 421 corresponding to the mounting slot 411, and the valve cover 42 is also provided with a plurality of air-permeable grilles 422; the one-way valve 44 is provided with a flange 443, one end of which penetrates into the interior of the valve body air outlet 37. When the spring 54 is compressed by the safety valve stem 51 squeezing the slider 53, the slider 53 and the sealing member 531 are separated from the safety valve sealing seat 52, and the gas can enter the second air cavity 48 from the air-permeable grille 422 and then the third air cavity to balance the air path pressure.

[0040] The one-way valve 44 is provided with a one-way diaphragm 441, and the filter cotton 47 is arranged between the valve cover 42 and the one-way valve fixing seat 46. A through hole is opened in the middle of the filter cotton 47, and the air outlet end 43 passes through the filter cotton 47. The one-way diaphragm 441 can limit the gas to pass only in one direction.

[0041] The solenoid valve 2 is provided with a solenoid valve stem 21, and the solenoid valve stem 21 is arranged in a valve stem sealing sleeve 22, and the valve stem sealing sleeve 22 is arranged in the air intake duct 32. The solenoid valve 2 controls the connection and closing of the air inlet 1 and the second air cavity 48 by controlling the solenoid valve stem 21, thereby realizing the delivery and cutoff of gas.

[0042] The suction valve body 3 is provided with a first pressure collection port 35 and a second pressure collection port 36, and the air inlet 1 is provided with a flow meter 11, which is used to monitor the gas flow entering from the air inlet. The gas flows to the pressure detection device through the first pressure collection port 35 and the second pressure collection port 36 to detect the gas pressure, ensuring that the gas is delivered to the user at a pressure value within the range.

[0043] A ventilator comprises the above-mentioned inhalation valve.

[0044] The above-mentioned inhalation valve is used on a ventilator. By controlling the switch of the added side branch airway through the provided safety valve, the air pressure in the airway is balanced, so that the ventilator provided with the above-mentioned inhalation valve is safer when used.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the new model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A suction valve, characterized in that: The invention comprises a solenoid valve (2), an intake valve body (3), an air path module (4) and a safety valve (5); the intake valve body (3) comprises a mounting seat (31), an air inlet passage (32) and a valve port sealing member (33); the mounting seat (31) and the intake valve body (3) are integrally formed, one end of the air inlet passage (32) is connected to the air inlet (1), the valve port sealing member (33) is against the other end in the air inlet passage (32), a valve body air outlet (37) is provided on one side of the cavity of the intake valve body (3), and a first air cavity (34) is formed between the inner cavity wall of the intake valve body (3), the valve body air outlet (37) and the one-way valve (44); The gas path module (4) comprises a housing (41), a valve cover (42), the one-way valve (44), a pin fixing seat (45), a one-way valve fixing seat (46), a filter cotton (47) and an air outlet (43); the housing (41) is connected to the mounting seat (31); the pin fixing seat (45) and the one-way valve (44) form a second air cavity (48); one end of the one-way valve fixing seat (46) is sleeved on the one-way valve (44) and sealed, and the other end is communicated with the air outlet (43); The safety valve (5) comprises a safety valve stem (51), a safety valve sealing seat (52), a slider (53), a spring (54) and a limit pin (55); a third air cavity (57) is formed between the mounting seat (31), the one-way valve (44), the safety valve sealing seat (52) and the slider (53); the safety valve sealing seat (52) is arranged in the safety valve sealing seat mounting seat (442); one end of the slider (53) is arranged in the safety valve sealing seat (52) and the other end is provided with a limit pin (55); one end of the safety valve stem (51) is connected to the safety valve (5) and the other end is extended into the third air cavity (57) through the through hole (311) and can abut against the slider (53).

2. The suction valve according to claim 1, characterized in that: The air circuit module (4) may also not use a pin fixing seat (45), the limit pin (55) is directly fixed on the one-way valve fixing seat (46), and the one-way valve (44) and the one-way valve fixing seat (46) directly form a second air cavity (48).

3. The suction valve according to claim 1, characterized in that: The limit pin (55) is fixedly mounted on the pin fixing seat (45); a spring (54) is disposed on the outer sleeve of the limit pin (55); one end of the spring (54) abuts against the pin fixing seat (45); the other end of the spring (54) is fixed on the slider (53); a cavity matching the limit pin (55) is formed inside the slider (53); the slider (53) can be sleeved on the limit pin (55) and slide along the direction of the limit pin (55).

4. The suction valve according to claim 3, characterized in that: A sealing member (531) is also provided on the outside of the sliding block (53), and the sealing member (531) is tightly pressed against the safety valve sealing seat (52) to achieve sealing between the second air cavity (48) and the third air cavity (57).

5. The suction valve according to claim 1, characterized in that: The shell (41) is provided with a mounting slot (411), the valve cover (42) is provided with a limit block (421) corresponding to the mounting slot (411), and the valve cover (42) is also provided with a plurality of air-permeable grilles (422); the one-way valve (44) is provided with a flange (443), and one end of the flange (443) penetrates into the interior of the valve body air outlet (37).

6. The suction valve according to claim 1, characterized in that The one-way valve (44) is provided with a one-way diaphragm (441), the filter cotton (47) is arranged between the valve cover (42) and the one-way valve fixing seat (46), a through hole is opened in the middle of the filter cotton (47), and the air outlet end (43) passes through the filter cotton (47).

7. The suction valve according to claim 1, characterized in that The solenoid valve (2) is provided with a solenoid valve stem (21), the solenoid valve stem (21) is arranged in a stem sealing sleeve (22), and the stem sealing sleeve (22) is arranged in the air intake passage (32).

8. The suction valve according to claim 1, characterized in that The suction valve body (3) is provided with a first pressure collection port (35) and a second pressure collection port (36), and the air inlet (1) is provided with a flow meter (11).

9. A ventilator, characterized in that: A suction valve comprising the suction valve according to any one of claims 1 to 8.

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