Poison filtering, ventilating and isolating system

Abstract

According to the toxin filtering, ventilating and isolating system, the isolating room can be used as an isolating and treating place for infected people and an isolating and protecting place for easily infected people, and when the isolating room is used as an isolating and treating place for the infected people, the controller can control the toxin filtering, ventilating and isolating system to be in a negative-pressure anti-diffusion mode; the interior of the isolation room is kept in a negative pressure state, so that high-concentration viruses in the isolation room are prevented from diffusing outwards to cause virus infection and diffusion; when the system is used as an isolation protection place for susceptible people, the controller can control the toxin filtering ventilation isolation system to be in a positive pressure protection mode and maintain the interior of the isolation room to be in a positive pressure state, so that external high-concentration viruses are prevented from entering the isolation room, and the susceptible people are protected from being infected; and the poison filtering ventilator is set to be in a low-efficiency poison filtering ventilation state, a medium-efficiency poison filtering ventilation state and a high-efficiency poison filtering ventilation state, and air entering from the outside is purified.

Description

Technical Field

[0001] The present application belongs to the technical field of gas filtering, ventilation and isolation design, and specifically relates to a gas filtering, ventilation and isolation system. Background Art

[0002] In order to prevent the spread of local virus infection in the outside world, it is necessary to establish isolation points to isolate and treat infected people, or to isolate and protect susceptible groups.

[0003] At present, in response to sudden viral transmission and spread incidents, most of the solutions are to find locations and build shelter hospitals as isolation points, which is time-consuming and labor-intensive. In addition, the ventilation system design is often not perfect and does not have efficient virus filtering effects, making it difficult to effectively prevent the spread of the virus.

[0004] This application is proposed in view of the above-mentioned technical defects.

[0005] It should be noted that the disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0006] The purpose of this application is to provide a gas filtering, ventilation and isolation system to overcome or alleviate at least one of the known technical deficiencies.

[0007] The technical solution of this application is:

[0008] A gas filtering and ventilating isolation system, comprising an isolation room, a gas filtering ventilator, and a controller;

[0009] A differential pressure gauge, low-pressure air intake valve, and overpressure exhaust valve are installed in the isolation room;

[0010] The gas filter ventilator includes an outer cylinder, a coarse-effect filter purification unit, a medium-effect filter purification unit, a high-efficiency filter purification unit, a fan, a front annular baffle, a front control valve, a middle control valve, and a rear control valve;

[0011] The outer tube is connected to the isolation room through the air supply pipe through the outlet, and the inlet is connected to the isolation room through the return air pipe; the air supply pipe is connected to the exhaust ventilation pipeline, and the exhaust ventilation pipeline is provided with a second control valve (II); the return air pipe is connected to the intake ventilation pipeline, and the intake ventilation pipeline is provided with a fifth control valve (V);

[0012] A coarse-effect filtration and purification unit, a medium-effect filtration and purification unit, a high-efficiency filtration and purification unit, and a fan are sequentially arranged in the outer cylinder;

[0013] The coarse-effect filtration purification unit, the medium-effect filtration purification unit, and the high-efficiency filtration purification unit are in a ring shape, the central part of which constitutes a central airway, and the outer side and the inner side of the outer cylinder constitute an outer ring airway;

[0014] The front annular baffle is arranged in the inlet of the outer ring airway to block the inlet of the outer ring airway, the front control valve is arranged in the central airway, between the coarse-efficiency filtration purification unit and the medium-efficiency filtration purification unit, the middle control valve is arranged in the outer ring airway, between the medium-efficiency filtration purification unit and the high-efficiency filtration purification unit, and the rear control valve is arranged in the central airway, at the rear end of the high-efficiency filtration purification unit;

[0015] The controller is connected to the front control valve, the middle control valve, and the rear control valve to control the gas filter ventilator to have:

[0016] In the coarse-effect gas filtration ventilation state, the control fan is turned on, the front control valve is closed, the middle control valve is opened, and the rear control valve is closed;

[0017] In the medium-efficiency gas filtration ventilation state, the control fan is turned on, the front control valve is closed, the middle control valve is closed, and the rear control valve is opened;

[0018] In the high-efficiency gas filtering and ventilation state, the fan is controlled to be turned on, the front control valve is closed, the middle control valve is closed, and the rear control valve is closed;

[0019] The controller is connected to the differential pressure gauge, the low-pressure air intake valve, the overpressure exhaust valve, the second control valve (II), and the fifth control valve to control the gas filtering ventilation isolation system to have:

[0020] Positive pressure protection mode: when the differential pressure gauge detection value is less than the positive pressure setting value, the fifth control valve opening is controlled to increase, the second control valve opening is controlled to decrease, and the overpressure exhaust valve is controlled to close, so that the differential pressure gauge detection value increases to the positive pressure setting value; when the differential pressure gauge detection value is greater than the positive pressure setting value, the fifth control valve opening is controlled to decrease, the second control valve opening is controlled to increase, and the overpressure exhaust valve is controlled to open, so that the differential pressure gauge detection value decreases to the positive pressure setting value, thereby maintaining the isolation room in a positive pressure state;

[0021] In the negative pressure diffusion prevention mode, when the differential pressure gauge detection value is less than the negative pressure setting value, the fifth control valve opening is controlled to increase, the second control valve opening is controlled to decrease, and the low-pressure intake valve is controlled to open, so that the differential pressure gauge detection value increases to the negative pressure setting value; when the differential pressure gauge detection value is greater than the negative pressure setting value, the fifth control valve opening is controlled to decrease, the second control valve opening is controlled to increase, and the low-pressure intake valve is controlled to close, so that the differential pressure gauge detection value decreases to the negative pressure setting value, thereby maintaining the isolation room in a negative pressure state.

[0022] Optionally, in the above-mentioned gas filtering and ventilation isolation system, the gas filtering and ventilating device further comprises a microbial disinfection component arranged in a dot matrix at the center of the inlet of the outer cylinder;

[0023] The controller is connected to the microbial disinfection component and can control the start and stop of the microbial disinfection component.

[0024] Optionally, in the above-mentioned gas filtering and ventilation isolation system, the coarse filtering and purification unit uses an annular skeleton as a supporting structure, and non-woven fabric is filled in it as an effective filtering component;

[0025] The medium-efficiency filtration purification unit uses a ring-shaped frame as a supporting structure, which is filled with chemical fiber filter material or glass fiber as an effective filtration component;

[0026] The high-efficiency filtration and purification unit uses a ring-shaped skeleton as a supporting structure, which is filled with ultra-fine glass fibers as effective filtration components.

[0027] Optionally, in the above-mentioned gas filtering ventilation isolation system, a first control valve and an air supply thermometer are sequentially arranged on the air supply pipe, and the connection node between the exhaust ventilation pipeline and the air supply pipe is between the first control valve and the air supply thermometer;

[0028] The return air duct is provided with a return air flow meter, a third control valve, and a fourth control valve in sequence, and the connection node between the intake ventilation pipeline and the return air duct is located downstream of the fourth control valve;

[0029] The gas filtering ventilation isolation system also includes a heat exchanger, the cold side of the heat exchanger is connected to the air supply pipe, located between the first control valve and the air supply thermometer, and the hot side is connected to the return air pipe, located between the third control valve and the fourth control valve;

[0030] A temperature control bypass is connected between the return air duct and the intake ventilation pipeline. The connection node of the temperature control bypass and the return air duct is between the third control valve and the fourth control valve, and the connection node with the intake ventilation pipeline is downstream of the fifth control valve, on which a sixth control valve is arranged;

[0031] The controller is connected to the first control valve, the third control valve, and the fourth control valve, and controls the first control valve, the third control valve, and the fourth control valve to open when the gas filtering ventilation isolation system is working;

[0032] The controller is connected to the return air flow meter and can adjust the power of the fan according to the measured value of the return air flow meter, thus forming a negative feedback regulation of the return air volume of the return air duct;

[0033] The controller is connected to the air supply thermometer and the sixth control valve, and can adjust the opening of the sixth control valve according to the measurement value of the air supply thermometer, thereby constituting negative feedback regulation of the air supply temperature of the air supply pipe.

[0034] Optionally, in the above-mentioned gas filtering and ventilation isolation system, an oxygen analyzer is provided in the isolation room;

[0035] The controller is connected to the oxygen analyzer and can adjust the opening of the second control valve and the fifth control valve according to the measured value of the oxygen analyzer, thereby forming a negative feedback regulation of the oxygen concentration in the isolation room.

[0036] This application has at least the following beneficial technical effects:

[0037] A gas-filtering, ventilating and isolating system is provided, in which an isolation room can be used as an isolation and treatment place for infected persons and an isolation and protection place for susceptible people. When used as an isolation and treatment place for infected persons, a controller can be used to control the gas-filtering, ventilating and isolating system to be in a negative pressure diffusion prevention mode, and maintain the isolation room in a negative pressure state, thereby preventing high-concentration viruses in the isolation room from spreading outward, causing the spread of virus infection; when used as an isolation and protection place for susceptible people, a controller can be used to control the gas-filtering, ventilating and isolating system to be in a positive pressure protection mode, and maintain the isolation room in a positive pressure state, thereby preventing high-concentration viruses from entering from the outside, and protecting susceptible people from infection. In addition, according to the pollution situation of the external air, the gas-filtering, ventilating and isolating device can be set in a coarse-effect gas-filtering, ventilation state, or a medium-effect gas-filtering, ventilation state, and a high-efficiency gas-filtering, ventilation state to purify the air entering from the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of a gas filtering, ventilation and isolation system provided in an embodiment of the present application;

[0039] Figure 2 is a schematic diagram of a gas filter ventilator provided in an embodiment of the present application;

[0040] in:

[0041] 1-isolation room; 2-differential pressure gauge; 3-oxygen analyzer; 4-differential pressure exhaust valve; 5-overpressure air intake valve; 6-gas filter ventilator; 7-supply air thermometer; 8-return air flow meter; 9-heat exchanger; 10-controller;

[0042] 61-including outer cylinder; 62-microorganism disinfection component; 63-coarse-effect filtration and purification unit; 64-medium-effect filtration and purification unit; 65-high-efficiency filtration and purification unit; 66-fan; 67-front annular baffle; 68-front control valve; 69-middle control valve; 60-rear control valve;

[0043] I-first control valve; II-second control valve; III-third control valve; IV-fourth control valve; V-fifth control valve; VI-sixth control valve;

[0044] A-Central airway; B-External airway.

[0045] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. DETAILED DESCRIPTION

[0046] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0047] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall be the common meanings understood by the general technicians in the field to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words indicating orientation used in the description of this application are only used to indicate the relative direction or positional relationship, and do not imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, so it cannot be understood as a limitation on this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The similar words "one", "one" or "the" used in the description of this application should not be understood as an absolute limitation on quantity, but should be understood as the existence of at least one. The similar words "including" or "comprising" used in the description of this application mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0048] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0049] A gas filtering ventilation isolation system mainly includes an isolation room 1, a gas filtering ventilator 6, a heat exchanger 9, a controller 10, etc. Figure 1 shown.

[0050] The isolation room 1 can be a cabin hospital, a ground residential building or other enclosed place, in which a differential pressure gauge 2, an oxygen analyzer 3, a low-pressure air intake valve 4 and an overpressure exhaust valve 5 are installed.

[0051] The gas filter ventilator 6 mainly includes an outer cylinder 61, a microbial disinfection component 62, a coarse-effect filtration purification unit 63, a medium-effect filtration purification unit 64, a high-efficiency filtration purification unit 65, a fan 66, a front annular baffle 67, a front control valve 68, a middle control valve 69, a rear control valve 60, etc. Figure 2 shown.

[0052] The outer cylinder 61 is connected to the isolation room 1 through the outlet through the air supply duct, and the inlet is connected to the isolation room 1 through the return air duct, and an inspection door is set on the side wall. The air supply duct is sequentially provided with a first control valve I, an air supply thermometer 7, and an exhaust ventilation pipeline. The connection node between the exhaust ventilation pipeline and the air supply duct is between the first control valve I and the air supply thermometer 7, and a second control valve II is set on it. The return air duct is sequentially provided with a return air flowmeter 8, a third control valve III, a fourth control valve IV, and an intake ventilation pipeline. The connection node between the intake ventilation pipeline and the return air duct is downstream of the fourth control valve IV, and a fifth control valve V is set on it.

[0053] The cold side of the heat exchanger 9 is connected to the air supply pipe, between the first control valve I and the air supply thermometer 7, and the hot side is connected to the return air pipe, between the third control valve III and the fourth control valve IV. A temperature control bypass is connected between the return air pipe and the intake ventilation pipeline. The connection node of the temperature control bypass and the return air pipe is between the third control valve III and the fourth control valve IV, and the connection node with the intake ventilation pipeline is downstream of the fifth control valve V, on which a sixth control valve VI is arranged.

[0054] The microbial disinfection component 62, the coarse-effect filtration purification unit 63, the medium-effect filtration purification unit 64, the high-efficiency filtration purification unit 65, and the fan 66 are sequentially arranged in the outer cylinder 61, and can be designed to be connected to the outer cylinder 61 by using a bracket.

[0055] The microorganism disinfection component 62 has the ability to disinfect microorganisms and can be arranged in a dot matrix at the center of the inlet of the outer cylinder 61 .

[0056] The coarse-effect filtration purification unit 63 is annular in shape, and can use an annular skeleton as a supporting structure, and is filled with non-woven fabric as an effective filtering component. It has the characteristics of large filtering surface, low initial resistance, large air volume, and high dust holding capacity, and is mainly designed to filter dust particles larger than 5μm.

[0057] The medium-efficiency filtration purification unit 64 is annular in shape, and can use an annular skeleton as a supporting structure. It is filled with chemical fiber filter material or glass fiber as an effective filtering component. It has the characteristics of large filtering surface, low initial resistance, large air volume, and high dust holding capacity. It is mainly designed to filter particulate dust and various suspended matter of 1μm to 5μm.

[0058] The high-efficiency filtration and purification unit 65 is annular in shape, and can use an annular skeleton as a supporting structure. It is filled with ultra-fine glass fibers as effective filtering components. It has the characteristics of large filtering surface, low initial resistance, large air volume, and high dust holding capacity. It is mainly designed to filter particulate dust suspensions and microbial aerosols of 0.1um to 0.3um.

[0059] The central parts of the coarse-efficiency filtration purification unit 63, the medium-efficiency filtration purification unit 64, and the high-efficiency filtration purification unit 65 constitute a central air duct A, and the outer sides of the coarse-efficiency filtration purification unit 63, the medium-efficiency filtration purification unit 64, and the high-efficiency filtration purification unit 65 and the inner side of the outer tube 61 constitute an outer ring air duct B.

[0060] The front annular baffle 67 is arranged in the inlet of the outer ring air duct B to block the inlet of the outer ring air duct B. The front control valve 68 is arranged in the central air duct A, between the coarse-efficiency filtration purification unit 63 and the medium-efficiency filtration purification unit 64. The middle control valve 69 is arranged in the outer ring air duct B, between the medium-efficiency filtration purification unit 64 and the high-efficiency filtration purification unit 65. The rear control valve 60 is arranged in the central air duct A, at the rear end of the high-efficiency filtration purification unit 65.

[0061] The controller 10 can be set in the isolation room 1, connected to the first control valve I, the third control valve III, the fourth control valve IV, and the fan 66. When the gas filtering and ventilation isolation system is working, the first control valve I, the third control valve III, and the fourth control valve IV are controlled to be opened. Conversely, the first control valve I, the third control valve III, and the fourth control valve IV can be controlled to be closed.

[0062] The controller 10 is connected to the front control valve 68, the middle control valve 69, and the rear control valve 60 to control the gas filter ventilator 6 to have:

[0063] In the coarse-effect filtration ventilation state, the control fan 66 is turned on, the front control valve 68 is closed, the middle control valve 69 is opened, and the rear control valve 60 is closed. At this time, under the suction effect of the fan 66, the air in the isolation room 1 will flow into the outer cylinder 61 through the return air duct. Due to the obstruction of the front annular baffle 67, it will enter the central air duct A. When the front control valve 68 is closed, the middle control valve 69 is opened, and the rear control valve 60 is closed, the air will radially pass through the side wall of the coarse-effect filtration purification unit 63 and enter the outer ring air duct B. The air is coarsely filtered to remove dust particles larger than 5μm, and then flows out through the outer ring air duct B and is sent back to the isolation room 1 through the air supply pipe;

[0064] In the medium-efficiency filtration ventilation state, the control fan 66 is opened, the front control valve 68 is closed, the middle control valve 69 is closed, and the rear control valve 60 is opened. At this time, under the suction effect of the fan 66, the air in the isolation room 1 will flow into the outer cylinder 61 through the return air duct. Due to the obstruction of the front annular baffle 67, it will enter the central air duct A. When the front control valve 68 is closed, the middle control valve 69 is opened, and the rear control valve 60 is closed, the air will radially pass through the side wall of the coarse-efficiency filtration purification unit 63 to enter the outer ring air duct B, and the coarse-efficiency filtration will remove dust particles larger than 5μm. Then, the air will radially pass through the side wall of the medium-efficiency filtration purification unit 64 and return to the central air duct A. The medium-efficiency filtration will remove 1μm to 5μm particles and various suspended matter, and then flow out through the central air duct A and be sent back to the isolation room 1 through the air supply pipe;

[0065] In the high-efficiency filtration ventilation state, the fan 66 is controlled to be open, the front control valve 68 is closed, the middle control valve 69 is closed, and the rear control valve 60 is closed. The air in the isolation room 1 will radially pass through the side wall of the coarse-efficiency filtration purification unit 63 into the outer ring air duct B, and the coarse-efficiency filtration will remove dust particles larger than 5μm. Then, it will radially pass through the side wall of the medium-efficiency filtration purification unit 64 and return to the central air duct A. The medium-efficiency filtration will remove particulate dust and various suspended matter of 1μm to 5μm. Then, it will radially pass through the side wall of the high-efficiency filtration purification unit 65 and enter the outer ring air duct B. The high-efficiency filtration will remove particulate dust, suspended matter and microbial aerosols of 0.1um to 0.3um, and then flow out through the outer ring air duct B and be sent back to the isolation room 1 through the air supply pipe.

[0066] The controller 10 is connected to the differential pressure gauge 2, the low-pressure intake valve 4, the overpressure exhaust valve 5, the second control valve II, and the fifth control valve V, so as to be able to control the gas filtering, ventilation and isolation system to have:

[0067] In the positive pressure protection mode, when the detection value of the differential pressure gauge 2 is less than the positive pressure setting value, the opening of the fifth control valve V is controlled to increase, the opening of the second control valve II is controlled to decrease, and the overpressure exhaust valve 5 is controlled to close, so that the detection value of the differential pressure gauge 2 increases to the positive pressure setting value; when the detection value of the differential pressure gauge 2 is greater than the positive pressure setting value, the opening of the fifth control valve V is controlled to decrease, the opening of the second control valve II is controlled to increase, and the overpressure exhaust valve 5 is controlled to open, so that the detection value of the differential pressure gauge 2 decreases to the positive pressure setting value, thereby maintaining the isolation room 1 in a positive pressure state, wherein the positive pressure setting value can be 30P a. In order to avoid frequent valve action, the positive pressure setting value can also be set to a certain range, such as 25-35Pa. When the detection value of the differential pressure gauge 2 is less than 25Pa, the opening of the fifth control valve V is controlled to increase, the opening of the second control valve II is controlled to decrease, and the overpressure exhaust valve 5 is controlled to close, so that the detection value of the differential pressure gauge 2 increases to 30Pa; when the detection value of the differential pressure gauge 2 is greater than 35Pa, the opening of the fifth control valve V is controlled to decrease, the opening of the second control valve II is increased, and the overpressure exhaust valve 5 is controlled to open, so that the detection value of the differential pressure gauge 2 decreases to 30Pa;

[0068] In the negative pressure diffusion prevention mode, when the detection value of the differential pressure gauge 2 is less than the negative pressure setting value, the opening of the fifth control valve V is controlled to increase, the opening of the second control valve II is controlled to decrease, and the low-pressure intake valve 4 is controlled to open, so that the detection value of the differential pressure gauge 2 increases to the negative pressure setting value; when the detection value of the differential pressure gauge 2 is greater than the negative pressure setting value, the opening of the fifth control valve V is controlled to decrease, the opening of the second control valve II is controlled to increase, and the low-pressure intake valve 4 is controlled to close, so that the detection value of the differential pressure gauge 2 decreases to the negative pressure setting value, thereby maintaining the isolation room 1 in a negative pressure state, wherein the negative pressure setting value can be -30Pa. In order to avoid frequent action of the valve, the negative pressure setting value can also be set to a certain range, for example, -35 to -25Pa. When the detection value of the differential pressure gauge 2 is less than -35Pa, the opening of the fifth control valve V is controlled to increase, the opening of the second control valve II is controlled to decrease, and the low-pressure intake valve 4 is controlled to open, so that the detection value of the differential pressure gauge 2 increases to -30Pa; when the detection value of the differential pressure gauge 2 is greater than 35Pa, the opening of the fifth control valve V is controlled to decrease, the opening of the second control valve II is increased, and the low-pressure intake valve 4 is controlled to close, so that the detection value of the differential pressure gauge 2 decreases to -30Pa.

[0069] The controller 10 is connected to the microorganism disinfection component 62 and can control the start and stop of the microorganism disinfection component 62 .

[0070] The controller 10 is connected to the return air flowmeter 8 and can adjust the power of the fan 66 according to the measurement value of the return air flowmeter 8, thereby constituting a negative feedback regulation of the return air volume of the return air duct. When the return air volume is lower than the set range of the supply air volume, the power of the fan 66 is controlled to be increased. Otherwise, the power of the fan 66 is controlled to be reduced or increased to maintain the circulating ventilation volume to the isolation room.

[0071] The controller 10 is connected to the supply air thermometer 7 and the sixth control valve VI, and can adjust the opening of the sixth control valve VI according to the measurement value of the supply air thermometer 7, thereby constituting a negative feedback regulation of the supply air temperature of the supply air pipe. When the supply air temperature is lower than the supply air temperature setting range, the opening of the sixth control valve VI is controlled to be reduced. Otherwise, the opening of the sixth control valve VI is controlled to be increased to maintain the supply air temperature to the isolation room 1.

[0072] The controller 10 is connected to the oxygen analyzer 3, and can adjust the opening of the second control valve II and the fifth control valve V according to the measured value of the oxygen analyzer 3, so as to form a negative feedback regulation of the oxygen concentration in the isolation room 1. When the oxygen concentration is lower than the oxygen concentration setting range, the second control valve II and the fifth control valve V are controlled to be opened and the opening is increased. On the contrary, the second control valve II and the fifth control valve V are controlled to be reduced until they are closed, so as to maintain the oxygen concentration in the isolation room 1. If the negative feedback regulation of the oxygen concentration in the isolation room 1 conflicts with the opening regulation of the second control valve II and the fifth control valve V in the positive pressure protection mode and the negative pressure diffusion prevention mode, the negative feedback regulation of the oxygen concentration in the isolation room 1 is limitedly guaranteed.

[0073] When a large-scale or localized virus transmission and spread event occurs in society, the isolation room 1 in the virus filtering ventilation isolation system disclosed in the above embodiment can be used as an isolation and treatment place for infected persons and an isolation and protection place for susceptible people. When used as an isolation and treatment place for infected persons, the controller 10 can control the virus filtering ventilation isolation system to be in a negative pressure diffusion prevention mode, and maintain the isolation room 1 in a negative pressure state, so as to prevent the high-concentration virus in the isolation room 1 from spreading outward, causing the virus transmission and spread; when used as an isolation and protection place for susceptible people, the controller 10 can control the virus filtering ventilation isolation system to be in a positive pressure protection mode, and maintain the isolation room 1 in a positive pressure state, so as to prevent the external high-concentration virus from entering and protect the susceptible people from being infected. In addition, according to the pollution situation of the external air, the virus filtering ventilator 6 can be set in a coarse-effect virus filtering ventilation state, a medium-effect virus filtering ventilation state, and a high-efficiency virus filtering ventilation state to purify the external incoming air, as follows:

[0074] When the external air is not contaminated by viruses and the air quality is good, the coarse-effect filtration ventilation state is adopted, and the air entering from the outside is only filtered and purified by the coarse-effect filtration purification unit 63 to remove dust particles larger than 5 μm, which can meet the use needs. The external air does not pass through the medium-efficiency filtration purification unit 64 and the high-efficiency filtration purification unit 65, thereby extending the service life of the medium-efficiency filtration purification unit 64 and the high-efficiency filtration purification unit 65;

[0075] When the external air is not contaminated by viruses but the air quality is poor, the medium-efficiency filtration and ventilation state is adopted, and the air entering from the outside is only filtered and purified by the coarse-efficiency filtration and purification unit 63 and the medium-efficiency filtration and purification unit 64, and dust particles larger than 5μm, as well as particles of 1μm to 5μm and various suspended matter are removed to meet the use needs. The external air does not pass through the high-efficiency filtration and purification unit 65, thereby extending the service life of the high-efficiency filtration and purification unit 65;

[0076] When the external air is contaminated by viruses, a high-efficiency filtration and ventilation state is adopted. The external air is filtered and purified by the coarse-efficiency filtration purification unit 63 and the medium-efficiency filtration purification unit 64 to remove dust particles larger than 5μm, as well as particulate dust and various suspended matter of 1μm to 5μm, and particulate dust suspended matter and microbial aerosols of 0.1um to 0.3um to meet the needs of use. In this state, the microbial disinfection component 62 can be controlled to start and disinfect the viruses in the external air to ensure the needs of air use.

[0077] The gas filtering ventilation isolation system disclosed in the above-mentioned embodiment mainly utilizes a gas filtering ventilator for ventilation and gas filtering. It can use a ground residential building or a closed place as an isolation room 1, which can be quickly built as an isolation point without the need to find a separate address to build a cabin hospital. It has high construction efficiency. In addition, it can be used for ventilation and gas filtering of the cabin hospital to effectively prevent the spread of the virus.

[0078] In the gas filtering and ventilation isolation system disclosed in the above-mentioned embodiment, in the gas filtering ventilator 6, the coarse-effect filtering and purification unit 63, the medium-effect filtering and purification unit 64, and the high-efficiency filtering and purification unit 65 are integrated, and the controller 10 can control the front control valve 68, the middle control valve 69, and the rear control valve 60 to achieve rapid switching among the coarse-effect gas filtering and ventilation state, the medium-effect gas filtering and ventilation state, and the high-efficiency gas filtering and ventilation state. The overall structure is simple and compact, and the operation is convenient.

[0079] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0080] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A gas filtering, ventilation and isolation system, characterized in that: It comprises an isolation room (1), a gas filter ventilator (6), and a controller (10); A differential pressure gauge (2), a low-pressure air intake valve (4), and an overpressure exhaust valve (5) are arranged in the isolation room (1); The gas filter ventilator (6) comprises an outer cylinder (61), a coarse-effect filtering and purification unit (63), a medium-effect filtering and purification unit (64), a high-efficiency filtering and purification unit (65), a fan (66), a front annular baffle (67), a front control valve (68), a middle control valve (69), and a rear control valve (60); The outer cylinder (61) is connected to the isolation room (1) through the outlet via the air supply pipe, and is connected to the isolation room (1) through the air return pipe at the inlet; the air supply pipe is connected to the exhaust ventilation pipeline, and the exhaust ventilation pipeline is provided with a second control valve (II); the return pipe is connected to the intake ventilation pipeline, and the intake ventilation pipeline is provided with a fifth control valve (V); A coarse-effect filtration and purification unit (63), a medium-effect filtration and purification unit (64), a high-efficiency filtration and purification unit (65), and a fan (66) are sequentially arranged in the outer cylinder (61); The coarse-effect filtration purification unit (63), the medium-effect filtration purification unit (64), and the high-efficiency filtration purification unit (65) are annular in shape, with the central portion constituting a central air passage (A), and the outer side and the inner side of the outer cylinder (61) constituting an outer ring air passage (B); The front annular baffle (67) is arranged in the inlet of the outer ring airway (B) to block the inlet of the outer ring airway (B); the front control valve (68) is arranged in the central airway (A) between the coarse-efficiency filtration purification unit (63) and the medium-efficiency filtration purification unit (64); the middle control valve (69) is arranged in the outer ring airway (B) between the medium-efficiency filtration purification unit (64) and the high-efficiency filtration purification unit (65); and the rear control valve (60) is arranged in the central airway (A) at the rear end of the high-efficiency filtration purification unit (65); The controller (10) is connected to the front control valve (68), the middle control valve (69), and the rear control valve (60) to control the gas filter ventilator (6) to have: In the coarse-effect gas filtering ventilation state, the control fan (66) is turned on, the front control valve (68) is closed, the middle control valve (69) is opened, and the rear control valve (60) is closed; In the medium-efficiency gas filtering and ventilation state, the control fan (66) is turned on, the front control valve (68) is closed, the middle control valve (69) is closed, and the rear control valve (60) is opened; In the high-efficiency gas filtering and ventilation state, the control fan (66) is turned on, the front control valve (68) is closed, the middle control valve (69) is closed, and the rear control valve (60) is closed; The controller (10) is connected to the differential pressure gauge (2), the low-pressure air intake valve (4), the overpressure exhaust valve (5), the second control valve (II), and the fifth control valve (V) to control the gas filtering, ventilation and isolation system to have: In the positive pressure protection mode, when the detection value of the differential pressure gauge (2) is less than the positive pressure setting value, the opening of the fifth control valve (V) is controlled to increase, the opening of the second control valve (II) is controlled to decrease, and the overpressure exhaust valve (5) is controlled to close, so that the detection value of the differential pressure gauge (2) increases to the positive pressure setting value; when the detection value of the differential pressure gauge (2) is greater than the positive pressure setting value, the opening of the fifth control valve (V) is controlled to decrease, the opening of the second control valve (II) is controlled to increase, and the overpressure exhaust valve (5) is controlled to open, so that the detection value of the differential pressure gauge (2) decreases to the positive pressure setting value, thereby maintaining the isolation room (1) in a positive pressure state; In the negative pressure diffusion prevention mode, when the detection value of the differential pressure gauge (2) is less than the negative pressure setting value, the opening of the fifth control valve (V) is controlled to increase, the opening of the second control valve (II) is controlled to decrease, and the low-pressure intake valve (4) is controlled to open, so that the detection value of the differential pressure gauge (2) increases to the negative pressure setting value; when the detection value of the differential pressure gauge (2) is greater than the negative pressure setting value, the opening of the fifth control valve (V) is controlled to decrease, the opening of the second control valve (II) is controlled to increase, and the low-pressure intake valve (4) is controlled to close, so that the detection value of the differential pressure gauge (2) decreases to the negative pressure setting value, thereby maintaining the isolation room (1) in a negative pressure state.

2. The gas filtering, ventilation and isolation system according to claim 1 is characterized in that: The gas filter ventilator (6) also includes a microorganism disinfection component (62) arranged in a dot matrix at the center of the inlet of the outer cylinder (61); The controller (10) is connected to the microorganism disinfection component (62) and can control the start and stop of the microorganism disinfection component (62).

3. The gas filtering, ventilation and isolation system according to claim 1 is characterized in that: The coarse filtering and purification unit (63) uses a ring-shaped skeleton as a supporting structure, and is filled with non-woven fabric as an effective filtering component; The medium-efficiency filtration purification unit (64) uses a ring-shaped frame as a supporting structure, and is filled with chemical fiber filter material or glass fiber as an effective filtration component; The high-efficiency filtering and purification unit (65) uses an annular skeleton as a supporting structure, and is filled with ultra-fine glass fibers as effective filtering components.

4. The gas filtering, ventilation and isolation system according to claim 1 is characterized in that: The air supply pipe is provided with a first control valve (I) and an air supply thermometer (7) in sequence, and the connection node between the exhaust ventilation pipeline and the air supply pipe is located between the first control valve (I) and the air supply thermometer (7); The return air duct is provided with a return air flow meter (8), a third control valve (III), and a fourth control valve (IV) in sequence, and the connection node between the intake ventilation pipeline and the return air duct is located downstream of the fourth control valve (IV); The gas filtering, ventilation and isolation system further comprises a heat exchanger (9), wherein the cold side of the heat exchanger (9) is connected to the air supply pipe and is located between the first control valve (I) and the air supply thermometer (7), and the hot side of the heat exchanger (9) is connected to the return air pipe and is located between the third control valve (III) and the fourth control valve (IV); A temperature control bypass is connected between the return air duct and the intake ventilation pipeline. The connection node of the temperature control bypass and the return air duct is between the third control valve (III) and the fourth control valve (IV). The connection node of the temperature control bypass and the intake ventilation pipeline is downstream of the fifth control valve (V), and a sixth control valve (VI) is arranged on the fifth control valve (V). The controller (10) is connected to the first control valve (I), the third control valve (III), and the fourth control valve (IV), and controls the first control valve (I), the third control valve (III), and the fourth control valve (IV) to open when the gas filtering, ventilation and isolation system is working; The controller (10) is connected to the return air flow meter (8) and can adjust the power of the fan (66) according to the measurement value of the return air flow meter (8), thereby constituting a negative feedback regulation of the return air volume of the return air duct; The controller (10) is connected to the air supply thermometer (7) and the sixth control valve (VI), and can adjust the opening of the sixth control valve (VI) according to the measurement value of the air supply thermometer (7), thereby forming a negative feedback regulation of the air supply temperature of the air supply pipe.

5. The gas filtering, ventilation and isolation system according to claim 4 is characterized in that: An oxygen analyzer (3) is arranged in the isolation room (1); The controller (10) is connected to the oxygen analyzer (3) and can adjust the opening of the second control valve (II) and the fifth control valve (V) according to the measured value of the oxygen analyzer (3), thereby forming a negative feedback regulation of the oxygen concentration in the isolation room (1).

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