Negative pressure ward air purification equipment

Abstract

The invention belongs to the field of negative pressure wards, and discloses negative pressure ward air purification equipment which comprises an incubator, an upper negative pressure unit and a lower negative pressure unit. The lower negative pressure unit is integrated on the inner side of the box door, and the top end of the lower negative pressure unit is provided with a butt joint part matched with the exhaust inlet of the lower negative pressure unit; the flow guide assembly is arranged between the air pipe and the lower negative pressure unit; when the box door is opened, rotation of the box door drives the flow guide assembly to be switched to an adsorption posture facing the box opening through the connecting rope, a negative pressure barrier for restraining transverse airflow is formed, airflow modes are automatically switched through pure mechanical linkage of opening and closing of the box door and the flow guide assembly, when the box door is closed, the lower negative pressure unit is connected with an air pipe, and laminar flow purification is formed in the incubator. Meanwhile, the flow guide assembly is driven to rotate through the connecting rope at the opening moment of the box door, and a negative pressure barrier is formed at the box opening, so that the situation that pollutants enter the incubator with eddy current at the opening moment of the incubator opening is reduced, and the air quality in the incubator at the opening moment of the incubator is improved.

Description

Technical Field

[0001] The present disclosure belongs to the field of negative pressure wards, and particularly relates to an air purification device for negative pressure wards. Background Art

[0002] During hospitalization, critically ill newborns will inevitably undergo various punctures, such as PICC puncture, umbilical artery and vein puncture, lumbar puncture, thoracentesis, and abdominal puncture. These operations take a relatively long time and are prone to causing damage to the newborn during movement. Therefore, punctures for newborns with weaker physical conditions are performed directly in an incubator. In order to keep the environment clean for the newborns, a negative pressure unit is installed around the incubator to reduce external pollutants.

[0003] For example, a neonatal puncture room with publication number CN214632755U forms an independent space in the ward to isolate the room from the external environment, thereby avoiding long-distance and long-term movement of infants, which would expose the infants to the external environment for a long time and thus cause reinfection and cold damage. However, when the door of the room is open and the puncture operation is performed, the activities of medical staff can easily destroy the stability of the laminar flow, causing the outer laminar flow to flow into the incubator and contaminate the air inside the incubator. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a negative pressure ward air purification device, which solves the problem in the existing technology that when the box door is opened and the puncture operation is performed, the laminar flow is disturbed by the medical staff and forms a vortex in front of the medical staff, so that after the box door is opened, pollutants in the external environment enter the incubator with the vortex and pollute the air in the incubator, thereby polluting the air in the incubator.

[0005] The purpose of this disclosure can be achieved through the following technical solutions:

[0006] A negative pressure ward air purification device, comprising: a warming box, an upper negative pressure unit and a lower negative pressure unit;

[0007] The side wall of the warming box is provided with an operating box opening, and the edge of the box opening is hinged with an openable and closable box door;

[0008] The upper negative pressure unit is fixed on the top of the incubator to form a vertical laminar flow from top to bottom;

[0009] The lower negative pressure unit is integrated into the inner side of the box door and includes an air duct fixedly connected to the box door, the top of which is provided with a docking portion that matches the air intake of the lower negative pressure unit;

[0010] The guide assembly is located between the air duct and the lower negative pressure unit. The first end of the connecting rope is fixed to the end of the synchronization plate, and the second end passes through the restraint ring and is fixedly connected to the inner side of the box door.

[0011] When the door is closed, the air intake of the lower negative pressure unit is sealed and buckled with the docking portion of the air duct, and the guide assembly maintains a guide angle of 15-30° with the axis of the air duct under the action of gravity, which is used to guide the air flow in the incubator through the guide assembly to the air duct;

[0012] When the box door is opened, the rotation of the door drives the guide component through the connecting rope to switch to an adsorption posture facing the box opening, forming a negative pressure barrier to suppress lateral airflow.

[0013] In some disclosures, the guide assembly includes a guide plate, a rotating rod and a synchronization plate. A rotating rod is fixed at the air suction port of the lower negative pressure unit. Multiple guide plates are rotatably mounted on the rotating rod through axial holes, and the upper ends of each guide plate are rigidly connected through the synchronization plate to form a parallelogram linkage mechanism. At the same time, one end of the synchronization plate is connected to the connecting rope.

[0014] In some disclosures, the other end of the connecting rope passes through the guide plate and is connected to the restraint ring, and the lower part of the restraint ring is connected to the box door through a rope.

[0015] In some disclosures, the restraint ring is formed by bending a metal wire with a diameter of 1-2 mm, the surface of which is coated with a polyurethane coating, and the inner wall of the restraint ring is fixedly connected to the connecting rope.

[0016] In some disclosures, the lower negative pressure unit includes a second axial flow fan, an air duct and an air suction port. The second axial flow fan is fixed to the upper end of the incubator, and an air duct is provided through the side wall of the second axial flow fan. The air suction port is fixed at one end of the air duct away from the second axial flow fan, and the guide assembly is located on the inner side of the air suction port.

[0017] In some disclosures, an air inlet is provided at the bottom of the incubator, and a filter is fixed on the outside of the air inlet.

[0018] In some disclosures, a docking portion is provided at the upper end of the air duct, and the shape of the docking portion is adapted to the air suction port of the lower negative pressure unit, and an air inlet is provided on the upper side wall of the air duct.

[0019] In some disclosures, a plurality of limiting columns are fixed to the side wall of the air suction port, and the upper portion of the connecting rope is passed around the plurality of limiting columns so that the restraint ring is located in the middle of the box opening.

[0020] In some disclosures, a tension spring is fixed to one end of the synchronization plate principle connecting rope, and the other end of the tension spring is fixed to the inner wall of the air suction port.

[0021] In some disclosures, the upper negative pressure unit includes a support frame, a wind hood and a first axial flow fan. The upper end of the incubator is provided with a wind hood, and a plurality of first axial flow fans are fixed on the inner side of the wind hood. An air outlet is provided on the lower end surface of the wind hood, and the air outlet corresponds to the position of the incubator up and down.

[0022] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0023] A fixed connection is a connection in which parts or components are fixed without any relative movement;

[0024] A rotational connection is a connection between parts that allows the parts to rotate relative to each other;

[0025] Threaded connection is a detachable fixed connection with the advantages of simple structure, reliable connection, and easy assembly and disassembly. It is widely used in mechanical engineering and connection structure fields.

[0026] A sliding connection is a connection between parts that allows the parts to slide relative to each other.

[0027] Beneficial effects of the present disclosure:

[0028] 1. Through the purely mechanical linkage between the door opening and closing and the guide component, the airflow mode is automatically switched. When the door is closed, the lower negative pressure unit is connected to the air duct, and laminar flow purification is formed in the incubator. At the same time, the guide component is driven to rotate by the connecting rope when the door is opened, and a negative pressure barrier is formed at the box opening to reduce the eddy current and pollutants that enter the incubator when the box opening is opened, which is beneficial to improve the air quality in the incubator when the incubator is opened.

[0029] 2. The angle of the guide plate is adjustable, which helps to reduce the cold air blowing directly on the doctor's arm and reduce operational interference. At the same time, the air flow can be swept by manual dragging to alleviate the problem of local cooling and adjust the wind direction of the guide plate during the puncture process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 This is a schematic diagram of the overall structure of the embodiment of the present disclosure when the door is open;

[0032] Figure 2 1 is a schematic diagram of the overall structure of the cabinet door when it is closed according to the embodiment of the present disclosure;

[0033] Figure 3 Schematic diagram of the overall structure of the incubator according to an embodiment of the present disclosure;

[0034] Figure 4 This is an embodiment of the present disclosure Figure 3 Another perspective diagram of the overall structure;

[0035] Figure 5 Schematic diagram of the overall structure of the door of the embodiment of the present disclosure;

[0036] Figure 6 This is a schematic diagram of the connection structure of the air suction port and the connecting rope according to an embodiment of the present disclosure;

[0037] Figure 7 This is a schematic diagram of the connection structure of the diversion assembly and the connecting rope according to an embodiment of the present disclosure;

[0038] Figure 8 This is a schematic diagram of the overall structure of the upper negative pressure unit from another perspective of an embodiment of the present disclosure.

[0039] In the figure: 1. Warming box; 101. Box opening; 102. Air inlet; 103. Filter; 2. Upper negative pressure unit; 21. Support frame; 22. Wind hood; 23. First axial flow fan; 221. Air outlet; 3. Box door; 4. Air duct; 41. Docking part; 42. Air inlet; 5. Guide assembly; 51. Guide plate; 52. Rotating rod; 53. Synchronizing plate; 531. Tension spring; 6. Lower negative pressure unit; 61. Second axial flow fan; 62. Air duct; 63. Air inlet; 631. Limiting column; 7. Constraint ring; 8. Connecting rope. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0041] Please refer to Figures 1 to 8 , a negative pressure ward air purification device, comprising: a warming box 1, an upper negative pressure unit 2 and a lower negative pressure unit 6;

[0042] An operating box opening 101 is provided on the side wall of the warming box 1, and an openable and closable box door 3 is hinged on the edge of the box opening 101;

[0043] The upper negative pressure unit 2 is fixed on the top of the incubator 1 to form a vertical laminar flow from top to bottom;

[0044] The lower negative pressure unit 6 is integrated into the inner side of the door 3 and includes an air duct 4 fixedly connected to the door 3, the top of which is provided with a docking portion that matches the air intake of the lower negative pressure unit 6;

[0045] The guide assembly 5 is provided between the air duct 4 and the lower negative pressure unit 6. The first end of the connecting rope 8 is fixed to the end of the synchronization plate 53, and the second end passes through the restraining ring 7 and is fixedly connected to the inner side of the door 3.

[0046] When the door 3 is closed, the air intake of the lower negative pressure unit 6 is sealed and fastened to the joint portion of the air duct 4. Under the action of gravity, the guide assembly 5 maintains a guide angle of 15-30 degrees with the axis of the air duct 4, which is used to guide the air flow in the incubator 1 to flow to the air duct 4 through the guide assembly 5.

[0047] When the door 3 is opened, the rotation of the door 3 drives the guide assembly 5 to switch to an adsorption posture facing the box opening 101 through the connecting rope 8, forming a negative pressure barrier to suppress lateral airflow.

[0048] When in use, when the box door 3 is closed, the air suction port of the lower negative pressure unit 6 is buckled with the upper end of the air duct 4. At this time, the guide component 5 is in an inclined state, and the end of the guide component 5 is aligned with the air outlet on the side wall of the air duct 4. The guide component 5 changes the flow direction of the wind in the lower negative pressure unit 6, so that the pollutants in the air in the incubator 1 enter the air duct 4 from the air outlet of the air duct 4, and the smoothness of the gas flow in the air duct 4 is improved by the guide component 5. At the same time, when the box door 3 is opened, the upper end of the air duct 4 is staggered with the air suction port of the lower negative pressure unit 6. At the same time, the distance between the box door 3 and the guide component 5 increases during the outward rotation of the box door 3, thereby dragging the connecting rope 8 outward, causing the connecting rope 8 to drive the guide component 5 to rotate, thereby driving the guide component 5 from close to the incubator One side of the incubator 1 rotates outside the box, and at the same time, the negative pressure unit 6 is turned on at the moment of opening to form negative pressure at the guide component 5 and a negative pressure barrier at the door 3. The medical staff and patients in the operation operate around the incubator 1, and their activities will inevitably interfere with the vertical unidirectional laminar flow, causing the original top-down airflow direction to shift, and even generate eddy currents toward the door 3. The negative pressure barrier set at the door 3 is compared with the wind barrier formed by the air outlet. Especially during the operation, the negative pressure barrier can effectively suppress the lateral airflow generated by the activities of medical staff and reduce the airflow disturbance. The passive switching of the airflow mode is realized through a purely mechanical structure, which reduces the industry problems such as turbulent pollution induced by human activities and thermal shock caused by the opening and closing of the incubator 1 in the traditional laminar flow system.

[0049] Please refer to Figures 5 to 7 The guide assembly 5 includes a guide plate 51, a rotating rod 52 and a synchronous plate 53. The rotating rod 52 is fixed at the air suction port of the lower negative pressure unit 6. Multiple guide plates 51 are rotatably mounted on the rotating rod 52 through shaft holes, and the upper ends of each guide plate 51 are rigidly connected through the synchronous plate 53 to form a parallelogram linkage mechanism. At the same time, one end of the synchronous plate 53 is connected to the connecting rope 8.

[0050] When in use, the hole on the inner side of the guide plate 51 is sleeved on the outer side of the rotating rod 52, so that the guide plate 51 can rotate with the rotating rod 52 as the center of the circle. At the same time, the upper ends of the multiple guide plates 51 are fixedly connected with the synchronous plate 53. At this time, the multiple guide plates 51 are arranged in parallel. The integrated connection structure of the rigid synchronous plate 53 and the multiple guide plates 51 ensures that each guide plate 51 maintains parallel movement, effectively avoiding the airflow turbulence caused by the asynchronous movement of multiple blades. One end of the synchronous plate 53 is fixedly connected to the connecting rope 8. In the natural state, the guide plate 51 faces the air outlet in the air duct 4. When the connecting rope 8 is subjected to the outward drag force, the synchronous plate 53 simultaneously drives the multiple guide plates 51 to rotate clockwise with the rotating rod 52 as the center of the circle, so that The guide plate 51 faces the box opening 101, and the angle of the guide plate 51 is optimized to match the traction stroke, so that the angle of the guide plate 51 can be adjusted synchronously at the moment of opening the box door 3, so that the horizontal airflow about to enter the incubator 1 can be sucked into the lower negative pressure unit 6 after the angle of the guide plate 51 is changed, thereby reducing the pollutants in the external air from entering the incubator 1. Since the angle of the guide plate 51 is tilted with the incubator 1 at this time, the gas extracted by the lower negative pressure unit is the gas around the box opening 101, rather than directly extracting the gas in the incubator 1, so that the gas flow in the incubator 1 can be reduced after the box body is opened, which is beneficial to reduce the temperature fluctuation in the incubator 1 and reduce the discomfort of the baby caused by the temperature difference.

[0051] Please refer to Figure 1 and Figure 6 The other end of the connecting rope 8 passes through the guide plate 51 and is connected to the restraint ring 7, and the bottom of the restraint ring 7 is connected to the box door 3 through a rope.

[0052] Please refer to Figure 6 The restraint ring 7 is formed by bending a metal wire with a diameter of 1-2 mm, and its surface is covered with a polyurethane coating. Its inner wall is fixedly connected to the connecting rope 8, and the diameter of the restraint ring 7 is 15-20 cm to facilitate the doctor's arm to pass through.

[0053] When performing a puncture on a newborn in the incubator 1, the doctor's hand passes through the restraint ring 7. At this time, the gas entering the lower negative pressure unit 6 from the guide plate 51 passes through the doctor's arm, thereby causing wind interference to the doctor's arm. Especially in winter, the arm is exposed to the wind for a long time during puncture, which can easily cause the hand to shake. After the doctor's hand passes through the restraint ring 7, the hand passing through the restraint ring 7 moves up and down to actively drag the connecting rope 8, and the upper end of the connecting rope 8 is connected to the guide component 5, so that the guide direction of the guide plate 51 can be actively changed during the process of dragging the doctor's hand up and down, thereby forming a sweeping wind on the doctor's arm, thereby reducing the impact on the same. The shaking problem caused by a part of the body being directly blown by cold air for a long time can be solved. At the same time, through the purely mechanical linkage airflow adjustment mechanism, the adaptive matching of hand movement-airflow response can be achieved without additional sensors or controllers. At the same time, during the puncture operation, the doctor usually needs to fix the newborn's arm with one hand and perform the puncture operation with the other hand. In the traditional method, if the direction of the guide plate 51 needs to be changed, the puncture action needs to be stopped, or a nurse needs to help. The space around the box opening 101 of the incubator 1 is small, and if more than one person stands there, the position will be crowded. At the same time, the restraint ring 7 is connected to the connecting rope 8 to facilitate the doctor to adjust the inclination angle of the guide component 5 when operating alone.

[0054] Please refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6 The lower negative pressure unit 6 includes a second axial flow fan 61, an air duct 62 and an air suction port 63. The second axial flow fan 61 is fixed to the upper end of the incubator 1, and the air duct 62 is penetrated through the side wall of the second axial flow fan 61. The air suction port 63 is fixed at one end of the air duct 62 away from the second axial flow fan 61, and the guide component 5 is located on the inner side of the air suction port 63.

[0055] When in use, start the second axial flow fan 61. When the second axial flow fan 61 rotates, it relies on the rotating impeller to push the gas below the gas impeller to flow upward, and the air pipe 62 is located below the impeller, so that when the impeller rotates, the gas in the air pipe 62 passes through the impeller and flows upward. At this time, a negative pressure cavity is formed on the inside of the air pipe 62, so that the gas in the incubator 1 enters the air pipe 62 through the air intake 63, and then passes through the second axial flow fan 61 through the air pipe 62 and is discharged to the outside, thereby extracting the gas with pollutants in the incubator 1, and then purifying the gas in the incubator 1.

[0056] Please refer to Figure 4 An air inlet 102 is provided at the bottom of the incubator 1 , and a filter 103 is fixed on the outside of the air inlet 102 .

[0057] When the gas in the incubator 1 flows outward through the air intake 63, a negative pressure cavity is formed in the incubator 1, and the inner cavity of the incubator 1 is connected with the external environment through the air inlet 102, so that when a negative pressure is formed in the incubator 1, a pressure difference is formed inside and outside the incubator 1, so that external gas enters the incubator 1 and forms an air replacement inside and outside the incubator 1, thereby purifying the air in the incubator 1.

[0058] Please refer to Figure 5 and Figure 7 The upper end of the air duct 4 is provided with a docking portion 41 , and the shape of the docking portion 41 is adapted to the air suction port 63 of the lower negative pressure unit 6 , and the upper end side wall of the air duct 4 is provided with an air inlet 42 .

[0059] When in use, the cross-section of the docking part 41 is triangular, and the hypotenuse of the triangle is hollow, and the cross-section of the air suction port 63 is triangular and adapted to the docking part 41. When the box door 3 is closed, the hypotenuse of the docking part 41 fits with the hypotenuse of the air suction port 63, and the length of the docking part 41 is greater than the length of the air suction port 63. The docking part 41 wraps the air suction port 63, so that the air duct 4 and the trachea 62 can be connected through the docking part 41 when the box door 3 is closed. At the same time, a rubber strip can be arranged between the trachea 62 and the air duct 4 to improve the air tightness of the connection between the air duct 4 and the trachea 62. At the same time, the lower negative pressure unit 6 is connected to the incubator 1 through the air duct 4, which can reduce the direct blowing on the newborn. At the same time, in order to improve the uniformity of the gas flow in the incubator 1, the size of the air inlet 42 on the air duct 4 can be increased.

[0060] Please refer to Figure 5 A plurality of limiting posts 631 are fixed to the side wall of the air suction port 63 , and the upper end of the connecting rope 8 is passed around the plurality of limiting posts 631 so that the restraint ring 7 is located in the middle of the box opening 101 .

[0061] The path of the connecting rope 8 is changed by the limiting column 631. The limiting columns 631 are respectively arranged on the inner wall of the air suction port 63 near the side of the synchronization plate 53, and the limiting columns 631 are located below the synchronization plate 53. When the connecting rope 8 is dragged downward, a force close to the limiting column 631 is applied to the synchronization plate 53. The remaining limiting columns 631 are arranged on the outer wall of the air suction port 63, of which two limiting columns 631 are respectively located at 1 / 4 of the left and right ends of the box opening 101. This distance is convenient for the doctor's arm to be inserted and connected by the connecting rope 8. Due to the thinner diameter of the connecting rope 8, the interference with the field of vision is reduced, and the connecting rope 8 is fixed to the side wall of the air suction port 63, which reduces the displacement and falling off of the connecting rope 8 during use. At the same time, the connecting rope 8 is a flexible connection. Compared with the rigid connection of the connecting rod, the flexible connection reduces the restriction on the doctor's arm, which is conducive to improving the flexibility of the doctor's arm movement.

[0062] Please refer to Figure 7One end of the synchronous plate 53 connecting rope 8 is fixed with a tension spring 531 , and the other end of the tension spring 531 is fixed to the inner wall of the air suction port 63 .

[0063] When the tension spring 531 is in its original length, the angle between the guide plate 51 and the horizontal plane is a guide inclination angle of 15-30°. When the connecting rope 8 is subjected to downward tension, the synchronous plate 53 is driven to move toward the end away from the tension spring 531, and the tension spring 531 is driven to stretch, thereby changing the inclination angle of the guide plate 51. At the same time, when the box door 3 is closed, the tension at the lower end of the connecting rope 8 is weakened. At this time, the tension spring 531 is reset, and drives the synchronous plate 53 and the guide plate 51 to rotate, so that the guide plate 51 is automatically reset, and the inclination angle of the guide plate 51 is quickly aligned with the air inlet 42 on the side wall of the air duct 4, thereby improving the smoothness of the air in the incubator 1 passing through the air inlet 42 and the air intake 63.

[0064] Please refer to Figure 1 、 Figure 2 、 Figures 6 to 8 The upper negative pressure unit 2 includes a support frame 21, a wind cover 22 and a first axial flow fan 23. The upper end of the incubator 1 is provided with a wind cover 22, and a plurality of first axial flow fans 23 are fixed on the inner side of the wind cover 22. An air outlet 221 is provided on the lower end surface of the wind cover 22, and the position of the air outlet 221 corresponds to that of the incubator 1 up and down.

[0065] During use, multiple first axial flow fans 23 are started. When the impeller in the first axial flow fan 23 rotates, the gas is sucked into the first axial flow fan 23 along the axial direction above the impeller, and the incubator 1 is located directly below the air outlet 221 on the wind hood 22, so that the airflow blown out by the first axial flow fan 23 enters the wind hood 22 and then passes through the air outlet 221 and blows directly above the incubator 1, thereby dispersing the suspended pollutants around the incubator 1 and improving the air quality around the incubator 1.

[0066] The negative pressure ward air purification device provided by the present invention is further described below in conjunction with the accompanying drawings and implementation methods.

[0067] When in use, the door 3 of the incubator 1 is in a closed state, and the upper negative pressure unit 2 and the lower negative pressure unit 6 are started. The upper negative pressure unit 2 is used to generate a blowing force downward and clean the suspension at the upper end of the incubator 1. At the same time, when the impeller in the lower negative pressure unit 6 rotates, a negative pressure state is formed in the air pipe 62, and the air in the incubator 1 is extracted through the air suction port 63. The pressure difference between the inside and outside of the incubator 1 causes the air outside the incubator 1 to be filtered and re-entered into the incubator 1, and the air in the incubator 1 is replaced, so that the air in the incubator 1 is purified;

[0068] When performing a puncture operation, the doctor stands at the box opening 101 of the incubator 1 and stands opposite the incubator 1. When the doctor opens the box door 3, the box door 3 rotates to the side away from the incubator 1 and pulls the bottom end of the connecting rope 8 downward, thereby driving the connecting rope 8 to move downward, and at the same time driving the synchronous plate 53 to move to the side away from the tension spring 531 through the connecting rope 8, and driving the tension spring 531 to extend. When the synchronous plate 53 rotates, it drives multiple guide plates 51 to rotate clockwise with their corresponding rotating rods 52 as the center of the circle, so that the inclination direction of the guide plates 51 is toward the box opening 101, thereby forming a negative pressure barrier at the box opening 101 of the incubator 1 through the lower negative pressure unit 6 and the guide assembly 5, thereby reducing the vortex formed by the doctor's obstruction from flowing into the incubator 1, which is conducive to improving the cleanliness of the air in the incubator 1;

[0069] At the same time, the doctor's hands are inserted into the restraint ring 7, and the doctor's hands perform the puncture operation. When the cold airflow generated by the negative pressure unit 6 passes through the same position of the doctor's arm for a long time and causes discomfort to the doctor, the doctor can slightly lift his arm up and down to change the elongation of the tension spring 531, thereby frequently changing the angle of the guide plate 51 to reduce the situation where the cold airflow blows on the same position of the doctor's arm for a long time.

[0070] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0071] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present disclosure. Various changes and improvements may be made to the present disclosure without departing from the spirit and scope of the present disclosure, and such changes and improvements shall fall within the scope of the present disclosure.

Claims

1. A negative pressure ward air purification device, characterized in that: include: A warming box (1), an upper negative pressure unit (2) and a lower negative pressure unit (6); The side wall of the warming box (1) is provided with an operating box opening (101), and an openable and closable box door (3) is hinged on the edge of the box opening (101); The upper negative pressure unit (2) is fixed on the top of the incubator (1) and is used to form a vertical laminar flow from top to bottom; The lower negative pressure unit (6) is integrated inside the box door (3), and includes an air duct (4) fixedly connected to the box door (3), the top end of which is provided with a docking portion that matches the air intake port of the lower negative pressure unit (6); A flow guide assembly (5) is provided between the air duct (4) and the lower negative pressure unit (6); a first end of the connecting rope (8) is fixed to the end of the synchronization plate (53), and a second end passes through the restraining ring (7) and is fixedly connected to the inner side of the box door (3); When the door (3) is closed, the air intake of the lower negative pressure unit (6) is sealed and fastened to the joint portion of the air duct (4), and the guide assembly (5) maintains a guide angle of 15-30° with the axis of the air duct (4) under the action of gravity, so as to guide the air flow in the warming box (1) to flow to the air duct (4) through the guide assembly (5); When the box door (3) is opened, the rotation of the box door (3) drives the flow guide component (5) to switch to an adsorption posture facing the box opening (101) through the connecting rope (8), forming a negative pressure barrier that suppresses lateral airflow.

2. A negative pressure ward air purification device according to claim 1, characterized in that: The deflector assembly (5) comprises a deflector plate (51), a rotating rod (52) and a synchronous plate (53). The rotating rod (52) is fixed at the air suction port of the lower negative pressure unit (6). The plurality of deflectors (51) are rotatably mounted on the rotating rod (52) through shaft holes. The upper ends of the deflectors (51) are rigidly connected via the synchronous plate (53) to form a parallelogram linkage mechanism. At the same time, one end of the synchronous plate (53) is connected to the connecting rope (8).

3. The negative pressure ward air purification equipment according to claim 2, characterized in that: The other end of the connecting rope (8) passes through the guide plate (51) and is connected to the restraining ring (7), and the lower part of the restraining ring (7) is connected to the box door (3) via a rope.

4. The negative pressure ward air purification equipment according to claim 2, characterized in that: The restraining ring (7) is formed by bending a metal wire with a diameter of 1-2 mm, the surface of which is coated with a polyurethane coating, and the inner wall of which is fixedly connected to the connecting rope (8).

5. The negative pressure ward air purification equipment according to claim 1, characterized in that: The lower negative pressure unit (6) comprises a second axial flow fan (61), an air pipe (62) and an air suction port (63); the second axial flow fan (61) is fixed to the upper end of the warming box (1), and the air pipe (62) is provided through the side wall of the second axial flow fan (61); the air suction port (63) is fixed to one end of the air pipe (62) away from the second axial flow fan (61), and the guide assembly (5) is located on the inner side of the air suction port (63).

6. The negative pressure ward air purification equipment according to claim 1, characterized in that: An air inlet (102) is provided at the bottom of the warming box (1), and a filter (103) is fixed on the outside of the air inlet (102).

7. The negative pressure ward air purification equipment according to claim 1, characterized in that: The upper end of the air duct (4) is provided with a docking portion (41), and the shape of the docking portion (41) is adapted to the air suction port (63) of the lower negative pressure unit (6). The upper end side wall of the air duct (4) is provided with an air inlet (42).

8. The negative pressure ward air purification equipment according to claim 7, characterized in that: A plurality of limiting columns (631) are fixed to the side wall of the air suction port (63), and the upper portion of the connecting rope (8) is passed around the plurality of limiting columns (631) so that the restraining ring (7) is located in the middle of the box opening (101).

9. The negative pressure ward air purification equipment according to claim 2, characterized in that: A tension spring (531) is fixed to one end of the principle connecting rope (8) of the synchronization plate (53), and the other end of the tension spring (531) is fixed to the inner wall of the air suction port (63).

10. The negative pressure ward air purification equipment according to claim 1, characterized in that: The upper negative pressure unit (2) comprises a support frame (21), a wind cover (22) and a first axial flow fan (23); the upper end of the warming box (1) is provided with a wind cover (22), and a plurality of first axial flow fans (23) are fixed on the inner side of the wind cover (22); an air outlet (221) is provided on the lower end surface of the wind cover (22), and the air outlet (221) corresponds to the position of the warming box (1) in the upper and lower directions.

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