Flexible isolation protective cover for laboratory

Abstract

The invention discloses a flexible isolation protective cover for a laboratory, relates to the technical field of isolation protection, explains a protective cover structure used in a medical laboratory, specifically improves the air inlet process, and improves the air inlet efficiency according to the formation process of a negative pressure environment in the protective cover. Firstly, an inflatable rubber balloon serves as a key structure of a pressure detection structure and is used for monitoring a negative pressure environment in a protective cover structure in real time, secondly, an air inlet process implemented by matching an air inlet mounting cover with an air blocking fan blade is further limited according to a pressure conversion process, and the air blocking fan blade is used for changing the opening degree of an air inlet channel on an air inlet grille; according to the essence, on the basis that the filtering structure is met, the air inflow is actively changed according to the internal pressure change of the protective cover structure, and on the basis that the internal gas leakage risk of the protective cover structure is reduced, the situation that the filtering effect of the filtering structure is affected by the difference between the air suction amount and the air inflow is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of isolation protection, and in particular to a laboratory flexible isolation protection cover. Background Art

[0002] The main function of the isolation protective cover is to form a relatively closed space, which is suitable for hospitals, laboratories and other places. Its essence is to form a negative pressure environment inside it to prevent the air mixed with pathogens from flowing into the external environment. The key process of the isolation protective cover is the two processes of gas flow and gas filtration. Please refer to the relevant content mentioned in the publication number: CN113304414A;

[0003] The essence of this is that it is necessary to continuously extract the air in the hood into the filter to complete the filtering action, thereby forming a negative pressure in the hood and automatically inhaling the air from the external environment. The two processes restrict each other. If the extracted gas is difficult to maintain a negative pressure environment that meets the requirements, the air inside and outside the hood will be mixed, so that some pathogens will leak into the external environment. If the amount of extracted gas is high, the workload of the filter will continue to increase, and the filter will also be in an invalid state.

[0004] The present invention proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a laboratory flexible isolation protective cover. For the negative pressure isolation protective cover used in laboratories or hospitals, the two major actions of gas flow and gas filtration during its operation restrict each other. On the one hand, it will directly affect the protection ability of the isolation cover, and on the other hand, it will also directly affect the workload of the filter and affect the filtering effect.

[0006] The object of the present invention can be achieved by the following technical scheme: a laboratory flexible isolation protective cover, comprising a transparent plastic cover, a mounting frame and a filter assembly, wherein the mounting frame is installed in the transparent plastic cover along a linear direction, and a protective cover structure is formed by the transparent plastic cover and the mounting frame, the filter assembly is installed at one end of the protective cover structure, and an air intake mounting cover is installed at the other end of the protective cover structure;

[0007] A driving motor is installed at one end of the air intake mounting cover, and air intake grilles are provided on both sides of the air intake mounting cover, and an air blocking fan corresponding to the air intake grille is installed at the end of the output shaft of the driving motor;

[0008] A connecting tube is installed at the top position inside the protective cover structure, and a plurality of inflatable rubber balloons are installed on the connecting tube along the length direction of the protective cover structure. A pressure detection assembly corresponding to the connecting tube and the inflatable rubber balloon is installed at the outer position of the protective cover structure.

[0009] It is further configured as follows: a plurality of operation windows are provided on the transparent plastic cover.

[0010] It is further configured that: a solenoid valve is installed at a middle position of the connecting pipe corresponding to two adjacent inflatable rubber balloons.

[0011] It is further configured as follows: the filter assembly includes an air intake structure and a filter structure, the pressure detection assembly includes a gas pressure sensor and a controller, and an operation and maintenance system associated with the protective cover structure is established with the controller in the pressure detection assembly.

[0012] It is further configured as follows: the operation and maintenance system is used to set a lower threshold value Qa and an upper threshold value Qb in the negative pressure environment inside the protective cover structure. Both the lower threshold value Qa and the upper threshold value Qb are used to indicate the pressure value inside the protective cover structure. When the pressure value inside the protective cover structure is higher than the lower threshold value Qa, it indicates that there is a risk of gas leakage to the outside of the protective cover structure; when the pressure value inside the protective cover structure is lower than the upper threshold value Qb, it indicates that there is a problem that a large amount of gas is sucked out by the air intake structure in the filter assembly or the air intake amount of the air intake mounting cover is insufficient.

[0013] It is further set as follows: a balance threshold Qo is set according to the lower limit threshold Qa and the lower limit threshold Qb, the balance threshold Qo is used to represent the middle value between the lower limit threshold Qa and the lower limit threshold Qb, the balance threshold Qo is lower than the lower limit threshold Qa and higher than the upper limit threshold Qb, and when the negative pressure environment inside the protective cover structure is at the balance threshold Qo, it directly indicates that the inside of the protective cover structure is in the best state.

[0014] It is further configured as follows: the pressure value inside the protective cover structure is obtained by real-time monitoring through the gas pressure sensor in the pressure detection assembly and is set as Qt. If Qt exceeds the lower limit threshold Qa, it is necessary to temporarily increase the air intake volume of the air intake structure per unit time;

[0015] If Qt is lower than the upper threshold value Qb, the air intake volume per unit time of the air intake structure is maintained, and the air intake volume per unit time of the air intake mounting cover needs to be temporarily reduced.

[0016] The present invention has the following beneficial effects:

[0017] 1. The overall structure is an explanation of the protective cover structure used in medical laboratories. On the basis of not changing the original structure, it specifically improves the air intake process during operation. Its essence is based on the air blocking fan blades and the air intake grille. The air blocking fan blades can be rotated in a directional manner or at a fixed angle according to relevant parameters. The purpose is to change the opening of the air intake channel on the air intake grille with the air blocking fan blades, and further limit the air intake process implemented by the air intake installation cover and the air blocking fan blades;

[0018] 2. Based on the above content, the inflatable rubber balloon is first used as the key structure of the pressure detection structure, which is used to monitor the negative pressure environment inside the protective cover structure in real time. The pressure value inside the protective cover structure is used as the reference data of the air blocking fan. The air intake volume is actively changed according to the pressure change inside the protective cover structure. The purpose is to reduce the risk of gas leakage inside the protective cover structure and avoid affecting the filtering effect of the filtering structure due to the difference between the inhaled air volume and the intake air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of a laboratory flexible isolation protective cover proposed by the present invention;

[0021] Figure 2 A laboratory flexible isolation protective cover proposed by the present invention Figure 1 Side view of

[0022] Figure 3 A laboratory flexible isolation protective cover proposed by the present invention Figure 1 A partial cutaway view of

[0023] Figure 4 This is a disassembled diagram of an air intake mounting cover in a laboratory flexible isolation protective cover proposed by the present invention.

[0024] In the figure: 1. Transparent plastic cover; 2. Mounting frame; 3. Air intake mounting cover; 4. Solenoid valve; 5. Pressure detection assembly; 6. Filter assembly; 7. Operation window; 8. Inflatable rubber balloon; 9. Connecting pipe; 10. Drive motor; 11. Air intake grille; 12. Air blocking fan. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1: For the negative pressure isolation protective cover used in laboratories or hospitals, the two major actions of gas flow and gas filtration during its operation restrict each other, which will directly affect the protective ability of the isolation cover on the one hand, and will also directly affect the workload of the filter and affect the filtering effect on the other hand. The following technical solutions are proposed:

[0027] Reference Figures 1 to 4 In this embodiment, a laboratory flexible isolation protective cover comprises a transparent plastic cover 1, a mounting frame 2 and a filter assembly 6. The mounting frame 2 is mounted in the transparent plastic cover 1 along a linear direction, and a protective cover structure is formed by the transparent plastic cover 1 and the mounting frame 2. The filter assembly 6 is mounted at one end of the protective cover structure, and an air intake mounting cover 3 is mounted at the other end of the protective cover structure.

[0028] A driving motor 10 is installed at one end of the air intake mounting cover 3, and air intake grilles 11 are provided on both sides of the air intake mounting cover 3. An air blocking fan 12 corresponding to the air intake grille 11 is installed at the end of the output shaft of the driving motor 10.

[0029] A connecting tube 9 is installed at the top position inside the protective cover structure, and a plurality of inflatable rubber balloons 8 are installed on the connecting tube 9 along the length direction of the protective cover structure. A pressure detection assembly 5 corresponding to the connecting tube 9 and the inflatable rubber balloon 8 is installed at the outside position of the protective cover structure. A plurality of operating windows 7 are opened on the transparent plastic cover 1, and a solenoid valve 4 is installed at the middle position of the connecting tube 9 corresponding to two adjacent inflatable rubber balloons 8.

[0030] Basic principle: The essence of the conventional protective cover structure is to temporarily isolate the internal and external environments. Take the isolation protective cover used in the laboratory as an example. When patients with infectious risks are isolated inside the protective cover, the isolation protective cover does not completely separate the internal and external environments. The key process is: continuously and stably suck out the air inside the protective cover and disinfect and inactivate the sucked air. In this process, a negative pressure environment is formed inside the protective cover, so fresh air from the external environment is sucked into the protective cover, thereby avoiding the risk of bacteria overflowing and infecting the external environment.

[0031] However, the present invention mainly improves the process of inhaling the outside, specifically based on the air intake mounting cover 3, and the essence of the filter assembly 6 proposed in the present invention is a combination structure of an air intake structure and a filtering structure, the air intake structure continuously inhales the air inside the protective cover, and the air inside the protective cover is disinfected and inactivated after passing through the filtering structure. If the air intake mounting cover 3 is in an open state, the air inside the protective cover may overflow due to the instability of the negative pressure environment;

[0032] The intake process proposed in this embodiment is as follows: Figure 4As shown, the air intake grille 11 is blocked by the air blocking fan blade 12, and the air blocking fan blade 12 continues to rotate with the normal operation of the driving motor 10. When the air blocking fan blade 12 completely blocks the air intake grille, the negative pressure air intake action will not be performed. On the contrary, when the air blocking fan blade 12 continues to rotate for a certain angle, the fresh air in the external environment is sucked into the internal environment of the protective cover;

[0033] For this purpose, it is necessary to control the air intake process according to the negative pressure condition of the internal environment of the protective cover and the working process of the air blocking fan 12. However, since the interior of the protective cover is not a completely closed environment, it is difficult to actually grasp the internal pressure conditions. For this purpose, the present invention mainly uses each inflatable rubber balloon 8 as a key structure for detecting negative pressure conditions, and is based on the pressure detection assembly 5.

[0034] Embodiment 2: This embodiment is to explain the pressure detection assembly 5:

[0035] The pressure detection assembly 5 is essentially composed of a gas pressure sensor and a controller. In theory, when each inflatable rubber balloon 8 is connected and each inflatable rubber balloon 8 is inflated in advance to expand, the pressure change of each inflatable rubber balloon 8 can be directly measured by the pressure sensor. Specifically, under a constant atmospheric pressure state, the inflatable rubber balloon 8 expands to a certain extent, but when the inside of the protective cover is in a negative pressure environment, the inflatable rubber balloon 8 will further expand outward, which can be further understood as: because of the volume change of each inflatable rubber balloon 8, the value detected by the gas pressure sensor is relatively low. This part is the basic technical point in the present invention;

[0036] However, it should also be noted that: each inflatable rubber balloon 8 is essentially connected in series through a connecting tube 9, but in actual circumstances, the connecting tube 9 can be temporarily blocked by one of the solenoid valves 4, thereby directly changing the air volume of the entire inflatable rubber balloon 8, the purpose of which is to detect the negative pressure environment in different positions inside the protective cover.

[0037] Embodiment 3: The following description is made in combination with Embodiment 1 and Embodiment 2:

[0038] First, it is necessary to limit the placement of the overall protective cover to ensure that the filter assembly 6 is set close to the patient's head position, the purpose of which is to ensure that the patient's exhaled gas can be sucked out as soon as possible. Then the air inlet mounting cover 3 is installed on the other side of the protective cover structure to Figure 3 For example, the external gas continuously enters the protective cover structure from right to left. For this, it is necessary to establish an operation and maintenance system with the controller in the pressure detection assembly 5, as shown below:

[0039] S1: First, the operation and maintenance system sets the lower threshold value Qa in the negative pressure environment inside the protective cover structure. It can be understood that the lower threshold value is mainly used to indicate the pressure value inside the protective cover structure, and can directly indicate that when the pressure value inside the protective cover structure is higher than the lower threshold value Qa, it indicates that there is a risk of gas leakage to the outside. However, it is also necessary to further set the upper threshold value Qb in the negative pressure environment inside the protective cover structure. The upper threshold value is essentially the same as the lower threshold value. The difference is that when the pressure value inside the protective cover structure is lower than the upper threshold value Qb, it can indicate that the amount of gas sucked out by the air intake structure in the filter assembly 6 is large or the amount of air intake through the air intake mounting cover 3 is insufficient. Therefore, it is necessary to ensure that the negative pressure environment inside the protective cover structure is maintained at: greater than the lower threshold value and less than the upper threshold value;

[0040] S2: Combined with the contents of S1, the air intake volume per unit time of the air intake structure in the pressure detection assembly 5 is set to VKt, and in order to maintain the normal operation of the filter structure, VKt is first set to a relative constant value in the present invention. In order to maintain the negative pressure environment inside the protective cover structure, the air intake volume per unit time of the air intake mounting cover 3 is used as the only variable and is set to VNt, and the value of the air intake volume is directly related to the rotation speed of the air blocking fan 12. For example, when the rotation speed of the air blocking fan 12 is low, and referring to Figure 4 When the air blocking fan blade 12 passes through the air intake grille 11 for a long time, the air blocking fan blade 12 blocks the air intake grille 11 for a long time, thereby reducing the amount of air flowing into the protective cover structure from the outside. Alternatively, the air blocking fan blade 12 may be rotated to a certain angle to limit the diameter of the air intake passage of the air intake grille 11.

[0041] Combined with the relevant contents in S1 and S2 above, the present invention specifically adopts the following operation process to maintain the negative pressure environment inside the protective cover structure:

[0042] Process 1: A balance threshold Qo is set according to the lower threshold Qa and the lower threshold Qb. The balance threshold is the middle value between the lower threshold Qa and the lower threshold Qb of Qo, which can directly indicate that the balance threshold Qo is lower than the lower threshold Qa and higher than the upper threshold Qb.

[0043] First, it is necessary to ensure that the negative pressure environment inside the protective cover structure is maintained between the lower threshold value Qa and the lower threshold value Qb. If it exceeds the lower threshold value Qa, it is necessary to temporarily increase the air intake volume of the air intake structure per unit time. On the contrary, if it is lower than the upper threshold value Qb, the air intake volume of the air intake structure per unit time is maintained, but the air intake volume per unit time of the air intake installation cover 3 needs to be temporarily reduced.

[0044] Process 2: Based on process 1, when the interior of the overall protective cover structure is under normal atmospheric pressure, the air inlet grille 11 is first directly blocked by the air blocking fan blade 12, so that a negative pressure environment is quickly formed inside the protective cover structure. Specifically, the negative pressure environment position inside the protective cover structure is within the value of the equilibrium threshold Qo. Subsequently, due to the breathing process of the patient and the inhalation process of the inhalation structure, the negative pressure environment inside the protective cover structure exceeds the value of the equilibrium threshold Qo, and it is also necessary to obtain the pressure value inside the protective cover structure through real-time monitoring by a gas pressure sensor and set it as Qt. For this, the air blocking fan blade 12 can be rotated by a certain angle to change the opening of the air inlet channel on the air inlet grille 11. In this process, the air intake volume is only related to the negative pressure environment inside the protective cover structure, and it is not a key method for this.

[0045] The specific method is: driving the air blocking fan blade 12 to rotate at a variable speed, mainly to continuously change the opening of the air intake channel on the air intake grille 11, which can be further understood as limiting the air intake volume per unit time. On the basis of maintaining a relatively constant negative pressure environment inside the protective cover structure, when the opening of the air intake channel increases, the air intake volume per unit time is further increased, and the air intake volume per unit time is proportional to the opening of the air intake channel;

[0046] To summarize, according to the relevant contents in process two, when the air-blocking fan 12 performs directional rotation, based on the value of the balance threshold Qo, when the internal pressure environment of the protective cover structure is higher than the balance threshold Qo, it is necessary to temporarily block the air intake channel on the air intake grille 11 or reduce the opening of the air intake channel so that the pressure environment inside the overall protective cover structure is maintained within the range of the balance threshold Qo.

[0047] To sum up: the protective cover structure used in medical laboratories is explained, and specifically the air intake process is improved. According to the formation process of the negative pressure environment inside the protective cover, firstly, an inflatable rubber balloon is used as the key structure of the pressure detection structure, which is used to monitor the negative pressure environment inside the protective cover structure in real time. Secondly, according to the pressure conversion process, the air intake process implemented by the air intake mounting cover and the air blocking fan is further restricted. The air blocking fan is used to change the opening of the air intake channel on the air intake grille. Its essence is to actively change the air intake volume according to the pressure change inside the protective cover structure on the basis of satisfying the filtering structure. The purpose is to reduce the risk of gas leakage inside the protective cover structure, and also avoid the filtering effect of the filtering structure affected by the difference between the suction volume and the intake volume.

[0048] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A laboratory flexible isolation protective cover, comprising a transparent plastic cover (1), a mounting frame (2) and a filter assembly (6), characterized in that: The mounting frame (2) is mounted in the transparent plastic cover (1) along a linear direction, and a protective cover structure is formed by the transparent plastic cover (1) and the mounting frame (2), the filter assembly (6) is mounted at one end of the protective cover structure, and an air intake mounting cover (3) is mounted at the other end of the protective cover structure; A driving motor (10) is installed at one end of the outside of the air intake mounting cover (3), and air intake grilles (11) are provided at both sides of the air intake mounting cover (3), and an air blocking fan (12) corresponding to the air intake grille (11) is installed at the end of the output shaft of the driving motor (10); A connecting tube (9) is installed at the top end of the inner part of the protective cover structure, a plurality of inflatable rubber balloons (8) are installed on the connecting tube (9) along the length direction of the protective cover structure, and a pressure detection assembly (5) corresponding to the connecting tube (9) and the inflatable rubber balloon (8) is installed at the outer part of the protective cover structure.

2. A laboratory flexible isolation protective cover according to claim 1, characterized in that: The transparent plastic cover (1) is provided with a plurality of operation windows (7).

3. A laboratory flexible isolation protective cover according to claim 1, characterized in that: The connecting pipe (9) is provided with a solenoid valve (4) at a middle position corresponding to two adjacent inflatable rubber balloons (8).

4. A laboratory flexible isolation protective cover according to claim 1, characterized in that: The filter assembly (6) includes an air intake structure and a filter structure, the pressure detection assembly (5) includes a gas pressure sensor and a controller, and an operation and maintenance system associated with the protective cover structure is established with the controller in the pressure detection assembly (5).

5. A laboratory flexible isolation protective cover according to claim 1, characterized in that: The operation and maintenance system sets a lower threshold value Qa and an upper threshold value Qb in the negative pressure environment inside the protective cover structure. The lower threshold value Qa and the upper threshold value Qb are both used to represent the pressure value inside the protective cover structure. When the pressure value inside the protective cover structure is higher than the lower threshold value Qa, it indicates that there is a risk of gas leakage to the outside of the protective cover structure; when the pressure value inside the protective cover structure is lower than the upper threshold value Qb, it indicates that there is a problem that the amount of gas sucked out by the intake structure in the filter assembly (6) is too large or the intake amount of the intake mounting cover (3) is insufficient.

6. A laboratory flexible isolation protective cover according to claim 5, characterized in that: A balance threshold Qo is set according to the lower limit threshold Qa and the lower limit threshold Qb. The balance threshold Qo is used to represent the middle value between the lower limit threshold Qa and the lower limit threshold Qb. The balance threshold Qo is lower than the lower limit threshold Qa and higher than the upper limit threshold Qb. When the negative pressure environment inside the protective cover structure is at the balance threshold Qo, it directly indicates that the inside of the protective cover structure is in the best state.

7. A laboratory flexible isolation protective cover according to claim 5, characterized in that: The gas pressure sensor in the pressure detection assembly (5) monitors the pressure value inside the protective cover structure in real time and sets it as Qt. If Qt exceeds the lower limit threshold Qa, it is necessary to temporarily increase the air intake volume of the air intake structure per unit time. If Qt is lower than the upper threshold value Qb, the air intake amount per unit time of the air intake structure is maintained, and the air intake amount per unit time of the air intake mounting cover 3 needs to be temporarily reduced.

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