WO2019227828A1

WO2019227828A1 - Combinational isolated diagnosis table

Info

Publication number: WO2019227828A1
Application number: PCT/CN2018/111290
Authority: WO
Inventors: 周荣; 钟南山; 何师聪; 杨昆; 韩才旭
Original assignee: 广州安捷生物安全科技股份有限公司; 广东省南山医药创新研究院
Priority date: 2018-05-29
Filing date: 2018-10-22
Publication date: 2019-12-05
Also published as: KR102452218B1; CN108720935B; CN108720935A; KR20210013198A

Abstract

A combinational isolated diagnosis table comprises a diagnosis table body (1). The diagnosis table body (1) is provided with a disinfection system, a fan (2) and an air outlet groove (3) for forming a doctor-patient isolation wind curtain. The air outlet groove (3) is in communication with a work platform (11) of the diagnosis table body (1). An air intake port of the fan (2) is configured to intake outside air. The disinfection system is in communication with the air intake port of the fan (2). An air outlet port of the fan (2) is in communication with the air outlet groove (3). The air outlet groove (3) comprises a first groove (31) disposed parallel to a length direction of the diagnosis table body (1) and two second grooves (32) disposed in a width direction of the diagnosis table body (1). The two second grooves (32) are respectively in communication with the first groove (31). Blocking plates (4) capable of moving up and down are disposed on the first groove (31) at positions connected to the second grooves (32). The blocking plates (4) are configured to control the connection and disconnection between the first groove (31) and the second grooves (32). The combinational isolated diagnosis table can isolate the aerosol exhaled by the patient with infectious diseases from medical personnel to protect the health thereof, and can adjust the combination of air channels according to environmental changes, realizing flexible isolation and saving energy.

Description

Mother-child isolation clinic

Technical field

The invention relates to the technical field of medical equipment, in particular to a mother-child type isolation diagnosis table.

Background technique

The mother-child isolation diagnosis table is a cabinet provided on the body of the examination table for storage. The source of respiratory infectious diseases is mainly patients carrying infectious disease pathogens, and there are four main ways of transmitting respiratory disease pathogens: direct contact, indirect contact, (short distance) droplet transmission, and (short and long distance) air transmission. . According to literature review, short-distance transmission is more threatening than long-distance transmission in airborne transmission, so it is of great significance to study the transmission of pathogens within about 1.5m around the human body. The spread of pathogens around the patient makes the medical staff who communicate with them during the medical treatment process susceptible to infection by the patient. The design structure of the existing consultation table with the function of isolating doctors and patients is very complicated and the manufacturing cost is high. The currently used device for isolating doctors and patients installed on the consultation table body can be effectively isolated by forming a curtain, but because the design of the channel for blowing the curtain on the consultation table is relatively single, The flexibility is very low. If you want to form a completely closed isolated space between doctors and patients, you must place the consultation table device at a prescribed position in the consultation room, which will affect the placement of the consultation table device. In addition, in order to achieve the reliability of the protection of medical personnel, the improvement of this kind of examination table device will easily lead to higher energy consumption of the entire device and the disadvantage of wasting energy.

Summary of the Invention

Based on the shortcomings of the prior art, the present invention provides a mother-child isolation clinic, which can isolate aerosols exhaled by patients with infectious diseases during medical treatment from medical personnel to ensure medical services. The health of the personnel, and can adjust the air duct combination mode according to environmental changes, to achieve flexible partition work and save energy consumption.

Based on this, the present invention provides a mother-child type isolation diagnosis table, which includes a diagnosis table body, and the inside of the diagnosis table body is provided with a killing system, a fan, and an air outlet groove for forming a doctor-patient isolation wind wall. The air outlet groove is connected to the work surface of the consultation table body, the air inlet of the fan is used to suck the outside air, the killing system is connected with the air inlet of the fan, and the air outlet of the fan is connected with the air outlet of the fan. The air outlet grooves communicate with each other, and the air outlet grooves include a first groove body arranged parallel to the length direction of the consultation table body and two second groove bodies respectively arranged along the width direction of the consultation table body. The two second grooves are respectively communicated with the first groove, and a connection between the first groove and the second groove is provided with an up-and-down telescopic baffle, and the baffle is used for controlling On-off of the connection between the first tank body and the second tank body.

Optionally, grooves are respectively provided on two oppositely arranged inner walls of the first groove body, and convex portions corresponding to the grooves are provided on both sides of the baffle plate, and the convex portions are positioned. In the groove and slidably connected with the groove.

Optionally, the mother-child isolation diagnosis table further includes a controller, and a driving device for driving the up and down telescopic movement of the baffle is provided in the diagnosis table body, and the driving device is electrically connected to the controller.

Optionally, the air supply speed of the fan is 2m / s to 4m / s.

Further, an air outlet corresponding to the air outlet groove is provided on a work surface of the consultation table body, and the air outlet groove has a U-shaped structure.

Optionally, at least one drainage plate is provided inside the first groove body, the drainage plate is used to deflect the doctor-patient isolation wind wall toward the patient seating direction, and the drainage plate and the first groove body The included angle in the normal direction is 15 ° to 25 °.

Optionally, the drainage plates are arranged in parallel with each other, and the intervals between the drainage plates are equal.

Optionally, there is a first chamber and a second chamber inside the consultation table body, and the fan forms a positive and negative pressure difference between the first chamber and the second chamber, and the consumer The killing system is disposed in the first chamber, the air outlet groove is located in the second chamber, and an air suction port is provided on a side wall of the consultation table body, and the air suction port is connected to the first chamber through.

Further, an air storage box is provided in the second chamber, the inlet of the air storage box is in communication with the air outlet of the fan, and the outlet of the air storage box is connected to the first tank. through.

Optionally, the mother-child isolation clinic further includes a control module, the control module includes a main control unit, a detection unit for detecting wind speed, and a touch screen provided on the clinic body, the touch screen and the The main control unit is electrically connected, and the main control unit is electrically connected to the detection unit, the fan, the killing system, and the controller, respectively.

Implementing the embodiments of the present invention has the following beneficial effects:

The fan set inside the mother-child isolation diagnosis table of the present invention can make a positive and negative pressure difference inside the diagnosis table body, and the air outlet groove connected with the air outlet of the fan can blow an isolation air curtain between the patient and the medical staff, so that In the process of language communication between patients with respiratory diseases and medical staff, it can strengthen the isolation effect of the patient's saliva and / or aerosol; the air inlet of the fan and the killing system work together to effectively inhale The saliva exhaled by the patient may carry viruses, bacteria and other infectious sources, and the disinfection and disinfection purification process is performed in time through the killing system to prevent the patient's saliva and / or aerosol from being circulated and spread in the air, which avoids the health of medical staff It poses a threat; clean air after the disinfection and sterilization by the purification device can be re-transmitted into the air outlet trough and blown out by the fan, and then provide support for the formation of the isolation curtain, thereby completing the recycling of the air in the environment. The air outlet groove includes a first groove body parallel to the length direction of the consultation table body and two second groove bodies arranged along the width direction of the consultation table body. The two ends of the first groove body are respectively communicated with the second groove body. Therefore, a closed wind curtain with better protection can be formed between the air curtain blown out by the first tank body and the air curtain blown out by the two second tank bodies. The up-and-down telescopic baffle can flexibly control the opening and closing between the two second tanks and the first tank respectively. Therefore, when the isolation diagnosis table is set in an environment that can be isolated by foreign objects, the control block The extension of the board can effectively cut off the communication between the second tank and the first tank on either side, thereby facilitating the flexible and controllable adjustment of the air duct and saving its energy consumption in actual work.

Further, the groove provided in the first slot for the up and down telescopic sliding of the baffle plate can provide a reliable track for the movement of the baffle plate and ensure the smoothness of the up and down movement of the baffle plate; the up and down movement of the baffle plate is controlled by the controller Implementation, the operation control process is very simple; a drainage plate provided inside the first tank for tilting the isolation air curtain toward the patient can form a 15 ° -25 ° clip between the air curtain and the normal direction of the first tank The air curtain blown from the first tank can effectively control the patient's exhaled gas in a small area behind him, so that the gas does not easily reach the breathing zone of the medical staff, so as to achieve the best The purpose of suppressing the spread of contaminated gas is to better block the interaction of air flow between patients and medical staff and reduce the risk of aerosol cross infection in the actual environment. The drainage plates arranged parallel to each other and equally spaced can make the air curtain formed at the first tank more uniform. The isolation clinic also includes an air storage box, which can collect the gas discharged by the fan and ensure a certain Wind pressure, so that the air is blown out uniformly through the first tank to form a positive pressure air curtain with uniform distribution of strength, which effectively guarantees the reliability of the air curtain to isolate patients and medical staff; the work of the entire isolation clinic Controlled by the control module, the degree of automation is high, and it has high flexibility in actual use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an explosion structure of a mother-child isolation diagnosis table according to this embodiment; FIG.

FIG. 2 is a schematic diagram of the air flow direction of the mother-child isolation diagnosis table according to the embodiment; FIG.

3 is a schematic structural diagram of an air outlet groove according to this embodiment;

FIG. 4 is an enlarged structural schematic diagram at A in FIG. 3; FIG.

FIG. 5 is a schematic cross-sectional structure view of a first groove body according to this embodiment; FIG.

FIG. 6 is a schematic diagram of the positions of the test points on the first air duct and the second air duct on the left and right sides;

FIG. 7 is a schematic diagram of the positions of the test points on the third air outlet on the left and right sides;

FIG. 8 is a composition diagram under the control case0 condition; FIG.

Figure 9 is a composition diagram under the scenario 5Case 2;

Figure 10 is a composition diagram under the conditions of Scenario 5Case 5;

Figure 11 is a composition diagram under the conditions of Scenario 5Case 8;

Figure 12 is a composition diagram under the conditions of Scenario 1Case1;

Figure 13 is a composition diagram under the conditions of Scenario 1Case 2;

Figure 14 is a composition diagram under Scenario 1Case 3 conditions;

15 is a line chart of the average mole fraction (× 10 ^-4 ) of the tracer gas near the mouth of the medical staff at different air supply speeds and air supply angles.

Reference sign description:

1. Clinic table body, 11, working table, 111, exhaust port, 12, suction port, 2, fan, 3, air outlet slot, 31, first slot body, 311, groove, 32, second slot body , 33, third tank, 4, baffle, 41, convex portion, 5, drainage plate, 6, air storage box.

Detailed ways

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms “up”, “down”, “left”, and “right” are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of It is convenient to describe the present invention and simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Referring to FIGS. 1 to 5, the mother-child isolation diagnosis table according to the preferred embodiment includes a diagnosis table body 1, and the inside of the diagnosis table body 1 is provided with a killing system, a fan 2, and a doctor-patient isolation wind wall. The air outlet groove 3 is connected to the work surface 11 of the consultation table body 1. The air inlet of the fan 2 is used to suck in the outside air, and the killing system is connected with the air inlet of the fan 2. The air outlet is connected, and the air outlet of the fan 2 is in communication with the air outlet groove 3. The air outlet groove 3 includes a first groove body 31 arranged in parallel with the length direction of the consultation table body 1 and two A second groove body 32 arranged along the width direction of the consultation table body 1, the two second groove bodies 32 are communicated with the first groove body 31 respectively, and the first groove body 31 is connected with the first groove body 31. A baffle 4 is provided at the connection of the two tanks 32 to expand and retract. The baffle 4 is used to control the on-off of the connection between the first tank 31 and the second tank 32.

Based on the above structure, when the mother-child isolation clinic is used, the side of the clinic body 1 near the patient is taken as the front end, the side near the medical staff is taken as the rear end, and the first groove of the air outlet 3 The body 31 is arranged parallel to the length direction of the examination table body 1 and is close to the front end of the examination table body 1. The fan 2 can form a positive and negative pressure difference inside the examination table body 1, so that the air in the environment can be passed through its air inlet. Inhalation is performed, and the air purified by the killing system is blown out from the air outlet tank 3 through its air outlet, thereby realizing the recycling of the air in the environment. During the communication between the patient and the medical staff, the positive pressure air wall formed by the air outlet 3 blowing between the patient and the medical staff can isolate the gas, aerosol or saliva with the source of infection exhaled by the patient. To prevent it from spreading to the side of the medical staff, to ensure the safety of the medical staff; and the substance exhaled by the patient, such as germs, can be sucked into the interior of the consultation table body 1 by the blower 2 and take the lead through the consumer. The killing system performs completely effective disinfection and sterilization to purify the clean air to prevent the transmission of germs or the hazards to the health of medical personnel. The purified air is blown out through the air outlet 3 so as to be able to Continuously provide supplemental gas to the wind wall, thereby improving the utilization rate of air in the environment. The dual means of blocking and sterilizing the gas carrying viruses are used to effectively avoid aerosol interactions during the communication between doctors and patients. The infection phenomenon guarantees the safety of medical staff. The air outlet groove 3 includes a first groove body 31 and two second groove bodies 32, and the two second groove bodies 32 communicate with the two ends of the first groove body 31 respectively, so that the gas blown out from the fan 2 can pass through The second grooves 32 on both sides of the first groove 31 are diffused to facilitate the formation of a better closed wind wall structure. A connection between the first groove 31 and the second groove 32 is provided. The upper and lower telescopic ground baffle 4 is used to control the opening and closing of the connection between the first tank 31 and the second tank 32. When the isolation clinic is used, if the isolation clinic is set in the center of the room , The two second tanks 32 need to work at the same time, so that the wind wall formed by the two and the first tank 31 can cooperate with each other to form a wall surrounded by three sides to ensure that the gas exhaled by the patient can be improved. The isolation effect, in order to ensure that air can flow from the first tank 31 to the second tank 32 on both sides at the same time, it is necessary to increase the supply of wind speed in the first tank 31, thereby increasing energy consumption; Any one of the left and right sides in the room is arranged against the wall. At this time, the wall can be used as a physical The separated medium forms a closed structure with the wind wall blown by the first tank 31 and the wind direction blown by the second tank 32 on the other side. At this time, the second tank 32 on the side of the wall can work without wind. The first tank body 31 only needs to supply air to the second tank body 32 on one side, and the setting of the baffle plate 4 can make this flexible for this use case. When the second tank body 32 on one side does not need When working, the baffle 4 can be directly adjusted to cut off the baffle. The operation control method is simple and the principle is reliable. It can save energy to a certain degree during use. The structure of the entire mother-child isolation clinic is very simple and very practical.

The two inner walls of the first groove body 31 are respectively provided with grooves 311, and the two sides of the baffle plate 4 are provided with convex portions 41 corresponding to the grooves 311, and the convex portions 41 are positioned in the grooves 311. The central part is slidably connected with the groove 311, and the up-and-down expansion and contraction of the baffle 4 is adjusted by using this connection form. The clinic body 1 is provided with a driving device for driving the up-and-down retractable movement of the baffle 4, the driving device and the controller It is electrically connected. Under the control of the controller, the driving device can drive the baffle 4 to make its convex portion 41 move up and down in the groove 311 to realize the on-off between the first groove body 31 and the second groove body 32. The process of adjusting the up and down movement of the baffle 4 is very simple, but the working effect is reliable. In this embodiment, the U-shaped structure is adopted for the air outlet groove 3, that is, the second groove body 32 and the first groove body 31 are arranged perpendicular to each other. The wind wall blown out by the air outlet groove 3 can surround the clothing personnel. In order to achieve a good isolation effect, in other embodiments, the shape of the air outlet groove 3 is not limited by this embodiment. When an appropriate shape can be selected according to actual needs to form a suitable wind wall, As long as it can provide reliable protection for medical personnel. The working table 11 of the examination table body 1 is provided with an air outlet 111 corresponding to the air outlet groove 3, and the air outlet 111 forms a U-shaped structure on the working table surface 11 of the examination table body 1 to facilitate the inside of the air outlet slot 3. The air blows out more evenly. Referring to FIG. 1, two third groove bodies 33 are further provided on the rear side of the consultation table body 1. The third groove bodies 33 are distributed in the vertical direction, and the ends of the third groove body 33 and the second groove body 32 The ends communicate with each other, and the wind wall formed by the mutual cooperation between the first groove body 31, the second groove body 32, and the third groove body 33 can provide medical personnel with more comprehensive isolation and protection.

In addition, at least one drainage plate 5 is provided inside the first tank body 31. In this embodiment, the number of the drainage plates 5 is preferably two. The drainage plates 5 are used to bias the doctor-patient isolation wind wall toward the patient's seating direction. In addition, the included angle between the drainage plate 5 and the normal direction of the first groove body 31 is 15 ° to 25 °. In this embodiment, the included angle is preferably 20 °. Therefore, the blowout from the first groove body 31 is The wind wall can effectively control the exhaled gas of the patient in a small area behind the patient, making it difficult for the exhaled gas of the patient to reach the breathing zone of the medical staff, thereby achieving the purpose of suppressing the spread of the virus, and the air flow around the medical staff does not close the curtain. The direct effect of the thermal plume can be developed normally, so that the airflow interaction between patients and medical staff can be better blocked, and the risk of aerosol infection in the actual environment can be reduced. The drainage plates 5 are arranged in parallel with each other, which can ensure that the air between the drainage plates 5 can be blown out in the same direction, ensuring the strength of the wind wall that can be formed, and the spacing between the drainage plates 5 is equal, ensuring that The clean air blown out by the fan 2 can be evenly distributed between the drainage plates 5 to ensure the uniformity of the wind out of the first tank 31, so that the working effect of the isolation wind curtain formed by it is better. The inside of the examination table body 1 has a first chamber and a second chamber. The fan 2 makes a positive and negative pressure difference between the first chamber and the second chamber. The killing system is arranged in the first chamber and has an air outlet. 3 is located in the second chamber, the side wall of the examination table body 1 is provided with an air suction port 12, which is connected to the first chamber, and the air suction ports 12 are located on the left and right sides of the examination table body 1, which is convenient for exhaling the patient. The gas is quickly inhaled to kill and improve the absorption efficiency. The negative pressure provided by the fan 2 to the first chamber can ensure the reliability of the gas inhalation of germs, and ensure that the air can be continuously inhaled from the air inlet 12 to kill. The system is located between the air inlet 12 and the fan 2, which can provide efficient sterilization and disinfection for the sucked air, and provide the efficiency of generating clean air. The clean air is sent to the second chamber through the fan 2 and passed The air outlet tank 3 outputs positive pressure to form an isolated wind wall. The killing system includes a primary effect filter, a disinfection and sterilization unit, and a high-efficiency filter connected in order. The air inlet 12 is connected to the primary effect filter. The high-efficiency filter is connected to the air inlet of the fan 2. The gas exhaled by the inhaled patient, which may carry viruses and bacteria, passes through the primary effect filter, the disinfection and sterilization unit, and the high-efficiency filter in order to be input into the fan 2. The purification unit includes multiple killing links, which can efficiently and reliably purify the air. Ensure the quality of purification work.

An air storage box 6 is provided in the second chamber. The inlet of the air storage box 6 communicates with the air outlet of the fan 2. The outlet of the air storage box 6 communicates with the first tank 31. Clean air passes through the fan 2 The output to the air storage box 6 is maintained by the air storage box 6 until the air pressure in the air storage box 6 reaches a certain value, and the control gradually overflows from the air storage box 6 Into the first tank body 31, the first tank body 31 is blown out uniformly, and the second tank bodies 32 on both sides of the refrigerator overflow, which can form a positive pressure air curtain with uniform strength and good isolation effect. During the working process of the air storage box 6, the wind conditions on the first tank 31, the second tank 32 on the left and right sides, and the third tank 33 on the left and right sides are tested and detected, see FIG. 6 and FIG. 7 is a schematic diagram of the positions of the test points on the first tank 31 and the second and left tanks 32 on the left and right sides during the test, and the test points on the third tank 33 for testing The schematic diagram of the location, the specific test data are shown in the statistics in Tables 1 and 2 below:

Table 1 shows the test data at each test point of the first slot body 31, the second left slot body 32, and the left third slot body 33;

Table 1

Table 2 shows the test data at each test point of the first slot body 31, the right second slot body 32, and the right third slot body 33;

Table 2

Generally, before the blower box is installed, the difference between the wind speeds at the air outlets in the entire isolation device is between 1.5m / s and 2.0m / s. By observing the above test data, it can be known that the air storage box is installed The difference in wind speed at each air outlet groove body on the isolation device after 6 has been greatly reduced, that is, a uniform pressure air curtain can be formed at each air outlet groove body with good isolation effect.

It should be noted that, in this embodiment, the air storage box 6 is selected as a Y-funnel structure. The inlet of the air storage box 6 is located on its side, the outlet of the air storage box 6 is located on its top, and the storage The length of the outlet of the air box 6 is equal to the length of the first tank 31. The air blown into the air storage box 6 by the fan 2 can be automatically diverted to both sides, so that the clean air blows out relatively uniformly. The design of the Y funnel shape also effectively reduces the air resistance, so that the air can smoothly transition into the first groove body 31, thereby ensuring the smoothness of air circulation. However, in other embodiments, the structural shape design of the air storage box 6 is not limited by this embodiment. When the actual type of the air storage box 6 can be selected according to actual needs. The air storage box 6 is also provided with a noise reduction device, which can reduce the noise generated during the work of the air storage box 6. The fan 2 is installed inside the mother-child isolation diagnosis table through the shock absorption device, which effectively reduces its work. The vibration generated in the process reduces the noise of the fan 2 and cooperates with the noise reduction device on the air storage box 6 to provide a better experience for the user to achieve a better use effect.

Further, the mother-child isolation clinic has a control module. The control module includes a main control unit, a detection unit for detecting wind speed, and a touch screen provided on the main body 1 of the clinic. The touch screen is electrically connected to the main control unit, and the main control unit The unit is electrically connected to the detection unit, the fan 2, the killing system, and the controller. The main control unit can receive the wind speed information fed back by the detection unit, and can realize the operation of the fan 2 and the purification unit according to the operation of the user through the touch screen. Adjust the control, change the wind speed and the killing system according to the actual situation. When medical personnel need to increase the strength of the isolation wind wall, the main control unit can be controlled by the touch screen to increase the wind speed, which can ensure the strength of the wind wall. It may be that the first tank 31 simultaneously supplies air to the two second tanks 32 to ensure the reliability of the wind wall blown by the second tank 32, and to ensure that the virus-containing gas, aerosol and saliva are blocked. It can effectively ensure the safety of medical personnel, has a high degree of automation of the entire process, and is easy to use. And the user can also control the controller through the touch screen control main control unit, and the controller adjusts the driving device to control the up and down state of the baffle 4, and selects the appropriate first slot body 31 and two according to the actual use situation. The on-off between the second tanks 32 is to save energy consumption.

The best isolation effect when the air curtain needs to be arranged 20 ° to the patient's direction is the conclusion obtained by research through CFD simulation technology experiments. The specific demonstration process is as follows:

Through the CFD simulation technology, the isolation effect of the airflow isolation protection device is studied, and the influence of different parameters on the isolation effect is mainly included: the speed of the air curtain air outlet, and the air supply angle. From these two aspects, suggestions for improving the optimal design of the protective device are put forward. Under the conditions of this simulation, the protective device is located in the center of the room, and the midpoint of the connection between the medical staff and the patient is the center of the room. The relevant parameters in the geometric model, including the size of the protective device, the size and position of the return air outlet, are established in accordance with the known parameters of the actual product, and reasonably simplified. Considering that the main function of the air curtain is to isolate the pathogenic microbial aerosols exhaled by the patient, in this simulation, the state of the patient and the doctor breathing at the same time under certain conditions is simplified. Gas condition.

To establish the CFD model and set the boundary conditions, first determine the geometric model as shown in Table 3:

Table 3 Geometric model dimensions

Then set the simulation conditions, see Table 4:

Table 4 Simulation condition settings

Note: Note: The air supply angle θ refers to the angle (°) between the air supply direction of the air supply opening in the longitudinal direction of the upper surface of the rack body 1 and its normal direction (toward the patient). During the simulation, the tracer gas is used to represent the gas components exhaled by the patient. The calculated component maps refer to the mole fraction distribution of the tracer gas.

Case 0 is used as a control group, and the main body 1 is provided with no air curtain. See FIG. 8 for the composition diagram of Case 0. The tracer gas is used to represent the gas component exhaled by the patient. Therefore, the composition diagrams refer to the tracer gas. Mole fraction distribution chart. The patient's exhaled air was sucked by the thermal plume generated above his head, rising to the top of his head, and also offsetting to a side wall. Under the same room ventilation system, the number of ventilations without a curtain is less than the number of ventilations with a curtain, so Case 0 has a smaller number of ventilations and a longer pollutant residence time. Because there is no air curtain blocking, the patient's airflow may swirl around the room, resulting in a high concentration of tracer gas near the doctor's mouth (which can reach several times that of other Cases), and the doctor's exposure time is longer. Therefore, it is very effective to set a wind curtain to reduce the risk of infection of the doctor.

It can be known from the simulation process that the effect of the air supply angle on the isolation effect of the protective device. Take Scenario 5 (

Case

2, 5, 8) as an example to study the effect of different air supply angles on the patient's exhalation and contamination trajectory. Figures 9, 10, and 11 correspond to the component diagrams under the conditions of Case 2, Case 5, and Case 8, respectively. Comparing the mole fraction distribution on the patient side in the figure, the following conclusions are obtained:

1. On the basis of Case 2, the air supply angle is adjusted to 20 °, and the cold airflow emitted from the first air outlet duct 3 of the rack body 1 can effectively control the exhaled air of the patient to a small amount behind the patient. In the area, it is not easy to reach the doctor's breathing zone, so as to suppress the spread of pollutants. The airflow around the doctor is not directly affected by the air curtain, and its thermal plume can develop normally. This situation can better block the airflow interaction between the patient and the doctor, and can reduce the risk of aerosol infection in the actual environment. 2. Case 8 tilts the direction of the air curtain to the patient side again, and the air supply angle is adjusted to 40 °. The air flow between the patient and the doctor is freely connected. The tracer gas concentration in the breathing area of the doctor's mouth is higher, and the air curtain Nothing. This is because the air supply angle of the air curtain is too low at this time, the air supply airflow is very easy to be attracted by the patient's exhaled airflow, and even the patient's exhaled airflow at a higher temperature is suppressed below it. The exhaled airflow of the patient can directly move over the airflow and move freely to the doctor's area. However, at the same time, the short-side air vent of the rack body 1 interferes and suppresses the movement of the patient's exhaled airflow, causing the patient's exhaled airflow to eventually deviate from the direction of the doctor and return to the patient.

In summary, during the entire simulation process, it was concluded that the isolation effect at a supply air angle of 20 ° (

Case

4, 5, 6) is better than 0 ° (

Case

1, 2, 3) and 40 ° (Case7, 8, 9). Because compared with 0 °, the 20 ° supply air stream has an active surface inclined toward the patient, which has a better suppressing effect on the patient's exhaled air and blows pollutants to the space behind the patient; while the 40 ° supply air The angle, because the airflow is tilted too much, is close to the height of the patient's mouth, and under the entrainment of the patient's exhaled airflow, it is brought directly under the patient's mouth by the exhaled airflow, which cannot block the patient's exhaled airflow.

It can also be known from the simulation process that the effect of the supply air speed on the isolation effect of the protective device. Take Scenario 1 (

Case

1, 2, 3) as an example to study the effect of different supply air speeds on the patient's exhalation and contamination trajectory, see figure 12. Figures 13 and 14 correspond to the component diagrams under the conditions of Case 1, Case 2, and Case 3, respectively. Comparing the mole fraction distribution on the patient side in the figure, the following conclusions are drawn:

1. In the case of Case 1, because the air supply speed of the air curtain is not high, the pollutants exhaled by the patient can easily cross the air curtain and move from the high position (close to the ceiling) to the doctor side. The isolation effect of the air curtain cannot be achieved. Guaranteed. This is because the air supply angle of the air curtain is vertically upward and the speed is not high. The weak air supply air is entrained by the patient's exhaled air shortly after it is ejected, which makes the air supply air flow of the air curtain slightly deviate to the patient side. . And because the density of the patient's exhaled air is greater than that of air, the pollutants have the opportunity to sink, and may bypass the bottom and sides of the rack body 1 and reach the doctor's breathing zone. Specific infection risks are also related to factors such as the type of pollutant, exposure time, and infection threshold. Therefore, in this case, although the air curtain has a certain effect on the surface of the near-frame main body 1, the effect is limited. The air velocity of the air supply of the protective device should be increased to further block the air exchange between the two persons.

2. In Case 2, the air supply speed of the air curtain is increased to 3m / s. At this time, the supply airflow formed a relatively complete air curtain, and the pollutants on the left of the patient were basically blocked on the left of the air curtain, and only a few could escape to the right of the air curtain. The exhaled air flow is biased toward the supply air flow, which is caused by the high speed of the supply air flow, which has a strong entrainment effect on the patient's output air flow. On the other hand, the cooler supply air flow is scattered in the room, even in the room. A certain temperature stratification was formed in the upper and middle parts (upper heat-lower middle heat-lower middle heat), which destroyed the thermal plume.

3. In Case 3, the air supply speed of the wind curtain is increased to 4m / s. At this time, the reinforced air curtain can completely separate the two people. This is because the cooler and higher speed air supply rushes directly to the ceiling, thus creating a powerful "wind curtain barrier" between the doctor and the patient. In this case, the chance of the pollutants reaching the doctor's breathing zone is even smaller, and they can generally be removed by the return air vents on both sides of the protective device before reaching the doctor's side. However, it can be obtained from the simulation process that the average concentration of the patient's exhaled air in the ceiling area above the doctor's head is actually higher than the case where the blower speed of the Case 2 stroke curtain is 3m / s, which increases the risk of contamination of the doctor's breathing area . This is because the higher velocity airflow has a stronger entrainment effect on the patient's exhaled air, the greater the difference between the density of the mixed gas and the surrounding air, the more likely the sinking occurs on the doctor's side. Therefore, the larger the air velocity is, the better.

In summary, referring to Figure 15 is a line chart of the average mole fraction of the tracer gas near the mouth of the medical staff at different air supply angles and air speeds. With reference to the entire simulation process and combining the line chart, the conclusion is:

1. The isolation effect of the supply air angle of 20 ° (

Case

4, 5, 6) is better than that of 0 ° (

Case

1, 2, 3) and 40 ° (Case 7, 8, 9). Because compared with 0 °, the 20 ° supply air stream has an active surface inclined toward the patient, which has a better suppressing effect on the patient's exhaled air and blows pollutants to the space behind the patient; while the 40 ° supply air The angle, because the airflow is tilted too much, is close to the height of the patient's mouth, and under the entrainment of the patient's exhaled airflow, it is brought directly under the patient's mouth by the exhaled airflow, which cannot block the patient's exhaled airflow;

2. The isolation effect of the supply air speed of 3m / s (

Case

2, 5, 8) is better than that of 2m / s (

Case

1, 4, 7) and 4m / s (

Case

3, 6, 9). The reason is that the wind curtain formed by the air supply speed of 2m / s is not strong enough, the aerosol sprayed by the patient has a certain speed, and the resistance of the wind curtain formed by the wind speed of 3m / s is greater than the wind formed by the wind speed of 2m / s. The resistance of the curtain, so the wind curtain formed by the air supply speed of 2m / s is easy to be punctured by the patient's exhaled airflow near the ceiling, causing the patient's exhaled airflow to leak into the doctor's side; and the 4m / s airflow speed will increase The disorder of the airflow in the room will aggravate the mixing of the air in the room, and the exhaled airflow of the patient is likely to be filled in the entire room, and the 4m / s air supply speed may cause the patient to bring the higher speed outflow. The feeling of hair blowing affects the comfort and experience of patients and medical staff, and the fan that forms a wind speed of 4m / s will generate a large noise during the work process, and consume excessive energy. The use cost is high, so the cost The wind speed in the examples is preferably 3 m / s.

3. The entrainment effect of wind curtain jet and human thermal plume is reflected in the simulation. At different air curtain speeds, patients' exhaled air will be affected by different entrainment effects. Taking Case 2 and Case 3 as examples, when the air curtain supply speed is small, the entrainment effect of the human thermal plume will dominate the movement of the patient's exhaled gas, and the exhaled gas is captured by the thermal plume above the head and heated. Ascending; when the air curtain supply speed is large, the entrainment effect produced by the air curtain jet will play a leading role, the exhaled gas of the patient will be drawn into the air curtain and follow the air current of the air curtain, and the pollutants will also Surrounded by wind curtains and controlled, the doctor's risk of infection is reduced.

The fan set inside the mother-child type isolation consultation table of the invention can make a positive and negative pressure difference inside the consultation table body, and the first air outlet duct connected with the air outlet of the fan can blow an isolation wind between the patient and the medical staff. Curtain, in the process of language communication between patients with respiratory diseases and medical staff, to strengthen the isolation of the patient's saliva and / or aerosol; and the air inlet of the fan and the purification unit work together to effectively Inhale the saliva exhaled by the patient, which may carry viruses, bacteria, and other infectious sources, and immediately perform a disinfection and sterilization purification process through the purification unit to prevent the patient's saliva and / or aerosol from being circulated and spread in the air, avoiding medical staff The health of the device poses a threat; clean air after the disinfection and sterilization by the purification device can be re-transmitted into the first air outlet through a fan to blow out, and then provide support for the formation of the isolation curtain, thereby completing the recycling of air in the environment. The air outlet groove includes a first groove body parallel to the length direction of the consultation table body and two second groove bodies arranged along the width direction of the consultation table body. The two ends of the first groove body are respectively communicated with the second groove body. Therefore, a closed wind curtain with better protection can be formed between the air curtain blown out by the first tank body and the air curtain blown out by the two second tank bodies. The up-and-down telescopic baffle can flexibly control the on-off between the two second tanks and the first tank respectively. Therefore, when the mother-child isolation diagnosis table is set in an environment where foreign objects can be used for isolation, Controlling the extension of the baffle plate can effectively cut off the communication between the second groove body and the first groove body on either side, thereby enabling flexible and controllable adjustment of the air duct and saving energy consumption in actual work.

It should be understood that the terms "first", "second", etc. are used in the present invention to describe various kinds of information, but the information should not be limited to these terms, these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as "second" information, and similarly, the "second" information may also be referred to as "first" information.

The above is the preferred embodiment of the present invention. It should be noted that, for those of ordinary skill in the art, without departing from the principle of the present invention, a number of improvements and deformations can also be made. These improvements and deformations also depend on It is the protection scope of the present invention.

Claims

A mother-child isolation diagnosis table includes a diagnosis table body, and the inside of the diagnosis table body is provided with a killing system, a fan, and an air outlet groove for forming a doctor-patient isolation wind wall, and the air outlet groove communicates with the air outlet groove. The air inlet of the fan is used to suck the outside air on the work surface of the consultation table body, the killing system is connected with the air inlet of the fan, and the air outlet of the fan is connected with the air outlet. The air outlet groove includes a first groove body arranged parallel to the length direction of the consultation table body and two second groove bodies respectively arranged along the width direction of the consultation table body, and the two second groove bodies are respectively Communicating with the first tank body, a joint between the first tank body and the second tank body is provided with a telescopic baffle which can be used to control the first tank body and the The on / off connection of the second tank is described.
The mother-child isolation diagnosis table according to claim 1, wherein grooves are respectively provided on two inner walls of the first groove opposite to each other, and two sides of the baffle plate are provided with the grooves. Corresponding convex portions are positioned in the grooves and are slidably connected to the grooves.
The mother-child isolation clinic according to claim 1, further comprising a controller, and a driving device for driving the up and down telescopic movement of the baffle is provided in the diagnostic table body, and the driving device and the controller Electrical connection.
The mother-child isolation clinic of claim 1, wherein the air supply speed of the fan is 2 m / s to 4 m / s.
The mother-child isolation diagnosis table according to claim 1, wherein an air outlet corresponding to the air outlet groove is provided on a work surface of the medical table body, and the air outlet groove has a U-shaped structure.
The mother-child isolation diagnosis table according to any one of claims 1 to 5, wherein at least one drainage plate is provided inside the first tank, and the drainage plate is used to bias the doctor-patient isolation wind wall toward the patient. The angle between the drainage plate and the normal direction of the first groove is 15 ° -25 °.
The mother-child isolation diagnosis table according to claim 6, wherein each of the drainage plates is arranged in parallel with each other, and the intervals between the drainage plates are equal.
The mother-child isolation clinic of claim 1, wherein the interior of the clinic body has a first chamber and a second chamber, and the fan causes the first chamber and the second chamber A positive and negative pressure difference is formed between them. The killing system is disposed in the first chamber, the air outlet groove is located in the second chamber, and an air suction port is provided on a side wall of the consultation table body. The air inlet is in communication with the first chamber.
The mother-child isolation diagnosis table according to claim 8, wherein an air storage box is provided in the second chamber, and an inlet of the air storage box is in communication with an air outlet of the fan, and the air storage The outlet of the box is in communication with the first tank.
The mother-child isolation clinic according to claim 3, further comprising a control module, the control module comprising a main control unit, a detection unit for detecting wind speed, and a touch screen provided on the body of the clinic, wherein A touch screen is electrically connected to the main control unit, and the main control unit is electrically connected to the detection unit, the fan, the killing system, and the controller, respectively.