CN212619028U - Negative pressure maintaining device for epidemic prevention isolation room - Google Patents
Negative pressure maintaining device for epidemic prevention isolation room Download PDFInfo
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- CN212619028U CN212619028U CN202021629847.3U CN202021629847U CN212619028U CN 212619028 U CN212619028 U CN 212619028U CN 202021629847 U CN202021629847 U CN 202021629847U CN 212619028 U CN212619028 U CN 212619028U
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- negative pressure
- air
- epidemic prevention
- isolation room
- controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model discloses a negative pressure keeping device for an epidemic prevention isolation room, which relates to a device capable of keeping room negative pressure, and aims to solve the problem that when a door and a window of the existing negative pressure isolation room are suddenly opened, a negative pressure fan cannot react in time, so that polluted air in a ward flows in; the air pressure sensor is arranged in the epidemic prevention isolation room, and the air pressure acquisition signal output end is electrically connected with the air pressure acquisition signal input end of the controller; the air volume regulating valve is arranged in an air duct of the epidemic prevention isolation room, and the opening signal input end is electrically connected with the opening signal output end of the controller; the negative pressure device comprises a frequency converter and a negative pressure fan; the variable frequency signal input end of the frequency converter is electrically connected with the variable frequency signal output end of the controller, and the motor speed regulation signal output end of the frequency converter is electrically connected with the motor speed regulation signal input end of the negative pressure fan motor; the negative pressure fan is positioned outside the epidemic prevention isolation room, and the air inlet end is communicated with the air duct.
Description
Technical Field
The utility model relates to a can keep the device of room negative pressure, concretely relates to device through air regulation valve quick adjustment room negative pressure.
Background
The negative pressure isolation room is used for isolation, and air exchange of spaces on two sides of the negative pressure isolation room, such as sickrooms and public areas, is prevented, so that viruses and bacteria are spread. In the existing negative pressure isolation room, a negative pressure fan is generally adopted to extract air to obtain negative pressure. However, when the door and window is suddenly opened, rapid pressure change is caused, and the negative pressure fan cannot respond in time, so that the air pressure change between negative pressure isolation is caused, and contaminated air in a ward may flow into a public area or contaminated air in the public area flows into the ward, thereby causing infection.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming when current negative pressure isolation room door and window is opened suddenly, negative-pressure air fan can't in time react to lead to the problem of contaminated air inflow in the ward, provide a negative pressure holding device for epidemic prevention isolation room.
The utility model discloses a negative pressure maintaining device for an epidemic prevention isolation room, which comprises a controller, an air pressure sensor, an air volume adjusting valve and a negative pressure device;
the air pressure sensor is arranged in the epidemic prevention isolation room, and an air pressure acquisition signal output end of the air pressure sensor is electrically connected with an air pressure acquisition signal input end of the controller;
the air volume regulating valve is arranged in an air duct of the epidemic prevention isolation room, and the opening signal input end of the air volume regulating valve is electrically connected with the opening signal output end of the controller; when the opening of the air volume adjusting valve is 0, the air duct is closed;
the negative pressure device comprises a frequency converter and a negative pressure fan;
the variable frequency signal input end of the frequency converter is electrically connected with the variable frequency signal output end of the controller, and the motor speed regulation signal output end of the frequency converter is electrically connected with the motor speed regulation signal input end of the negative pressure fan motor;
the negative pressure fan is positioned outside the epidemic prevention isolation room, and the air inlet end of the negative pressure fan is communicated with the air channel and used for extracting air in the epidemic prevention isolation room to generate negative pressure.
The utility model has the advantages that: air volume adjusting valves are added in the air channels in the epidemic prevention isolation rooms, the air flow of the air channels can be quickly adjusted by adjusting the opening degree of the air volume adjusting valves, when doors and windows are opened suddenly, the air pressure in the epidemic prevention isolation rooms can be adjusted by quickly reacting by adjusting the opening degree of the air volume adjusting valves, and the air pressure is prevented from rising suddenly to cause the circulation of polluted air.
Drawings
FIG. 1 is a schematic view of the negative pressure maintaining device and the epidemic prevention isolation room of the present invention;
fig. 2 is an electrical schematic diagram of the negative pressure maintaining device for the epidemic prevention isolation room of the present invention;
fig. 3 is a circuit diagram (not including analog-to-digital conversion) of the negative pressure maintaining device for the epidemic prevention isolation room of the present invention.
Detailed Description
In a first specific embodiment, the negative pressure holding device for the epidemic prevention isolation room of the present embodiment comprises a controller 1, an air pressure sensor 2, an air volume adjusting valve 3 and a negative pressure device;
the air pressure sensor 2 is arranged in the epidemic prevention isolation room 5, and an air pressure acquisition signal output end of the air pressure sensor 2 is electrically connected with an air pressure acquisition signal input end of the controller 1;
the air volume adjusting valve 3 is arranged in an air duct 6 of the epidemic prevention isolation room 5, and the opening signal input end of the air volume adjusting valve 3 is electrically connected with the opening signal output end of the controller 1; when the opening of the air volume adjusting valve 3 is 0, the air duct 6 is closed;
the negative pressure device comprises a frequency converter 4-1 and a negative pressure fan 4-2;
the frequency conversion signal input end of the frequency converter 4-1 is electrically connected with the frequency conversion signal output end of the controller 1, and the motor speed regulation signal output end of the frequency converter 4-1 is electrically connected with the motor speed regulation signal input end of the motor of the negative pressure fan 4-2;
the negative pressure fan 4-2 is positioned outside the epidemic prevention isolation room 5, and the air inlet end of the negative pressure fan 4-2 is communicated with the air duct 6 and used for extracting air in the epidemic prevention isolation room 5 to generate negative pressure.
Specifically, as shown in fig. 1, the specific use of the device is for hospitals and residences with isolation requirements, especially infectious disease hospitals, wherein the epidemic prevention isolation room 5 is used for isolating two spaces, such as office spaces and wards of medical staff, in order to prevent the medical staff from entering the wards, the air in the wards and the office spaces circulates, so that germs and the like are diffused, the epidemic prevention isolation room 5 is additionally arranged between the wards and the office spaces, and the epidemic prevention isolation room 5 generates negative pressure, so that the air in the spaces on two sides always flows to the air, and further, the air circulation in the spaces on two sides is ensured not to occur.
The air pressure sensor 2 monitors the air pressure in the epidemic prevention isolation room 5 in real time, acquires signals through the air pressure and sends the air pressure value detected in real time to the controller 1.
The controller 1 is internally preset with an air pressure threshold value, judges whether the received air pressure value is kept below the air pressure threshold value, and sends an opening signal to the air volume adjusting valve 3 to adjust the opening of the air volume adjusting valve 3 to be increased when the air pressure in the epidemic prevention isolation room 5 is detected to be changed disadvantageously, namely the air pressure in the epidemic prevention isolation room 5 exceeds the air pressure threshold value, and the negative pressure device is kept running all the time, so that the air pressure in the epidemic prevention isolation room 5 can be changed rapidly after the air volume adjusting valve 3 changes the opening, and the air pressure in the epidemic prevention isolation room 5 is adjusted in a rapid response mode. If the air pressure in the epidemic prevention isolation room 5 is recovered, namely, the air pressure drops below the air pressure threshold value, the opening degree of the air volume adjusting valve 3 is recovered (reduced), so that the air volume adjusting valve 3 is prevented from reaching the limit and cannot be adjusted any more during subsequent adjustment.
The negative pressure device comprises a frequency converter 4-1 and a negative pressure fan 4-2, and the rotating speed of a motor of the negative pressure fan 4-2 is further adjusted by adjusting the frequency of the frequency converter 4-1, so that the negative pressure generated by the negative pressure fan 4-2 is adjusted, the negative pressure device is used for adjusting the air pressure in the epidemic prevention isolation room 5 constantly, and the air pressure in the epidemic prevention isolation room 5 is always kept below a set value.
Meanwhile, air pressure in the epidemic prevention isolation room 5 can be adjusted to different degrees under different conditions through the matching of the air volume adjusting valve 3 and the negative pressure device according to requirements.
In this embodiment, the number of the air pressure sensors 2 is plural, and the air pressure sensors are respectively located in the anti-epidemic separation room 5 near the door or the window.
Specifically, since medical staff handles patients when entering a ward, the medical staff opens doors or windows, and thus, the change of air pressure in the isolation room 5 is also caused by doors and windows, and the air pressure sensor 2 mounted on the doors or windows can detect the change of air pressure in time.
Meanwhile, as shown in fig. 1, the spaces on both sides of the epidemic prevention isolation room 5 (not necessarily, the two spaces are just opposite sides, as long as the two spaces can be communicated through the epidemic prevention isolation room 5) may be provided with the air pressure sensors 2 in the office space and the ward of the medical staff, the detected air pressure in the region where the space is located is sent to the controller 1, the controller 1 compares the air pressure in the spaces on both sides with the air pressure in the epidemic prevention isolation room 5, the air pressure is adjusted in time when the air pressure in the epidemic prevention isolation room 5 exceeds one side of the spaces, and an alarm signal is sent to the alarm device to give an alarm.
Best embodiment, this example is a further description of the first embodiment, and in this example, the present example further includes a door proximity sensor 7 and a window proximity sensor 8;
the door proximity sensor 7 is arranged on the door leaf of the epidemic prevention isolation room 5, and the door switch signal output end of the door proximity sensor 7 is electrically connected with the door switch signal input end of the controller 1;
the window proximity sensor 8 is installed on the window sash of the epidemic prevention isolation room 5, and the window switch signal output end of the window proximity sensor 8 is electrically connected with the door switch signal input end of the controller 1.
Specifically, as shown in fig. 1, the door proximity sensor 7 is installed on the door leaf for detecting the open/close state between the door leaf and the door frame, and the window proximity sensor 8 is installed on the window sash for detecting the open/close state between the window sash and the window frame, and the two proximity sensors are used for providing the door/window opening/closing signal, so as to determine whether the door/window is opened or not and whether the air pressure needs to be adjusted or not, or when the air pressure sensor 2 fails but is not replaced, the air pressure in the anti-epidemic compartment 5 is adjusted by determining whether the door/window is opened or not.
And because door proximity sensor 7 and window proximity sensor 8 also can provide close isoparametric, when installing on sliding door or sliding window, can calculate the aperture of door and window, and then can be according to the different apertures of door and window, come to carry out the regulation of different degrees to the air pressure in epidemic prevention isolation room 5.
Best mode, this example is a further description of the first embodiment, and in this example, the controller 1 is an FX2N series controller. The door proximity sensor 7 and the window proximity sensor 8 are both NPN proximity switches of the IFRM18N17A3/S14L type.
Specifically, since the signal generated by the air pressure sensor 2 collecting the air pressure is an analog signal, the analog signal of the air pressure needs to be converted into a digital signal for subsequent processing by an analog-digital conversion circuit, which may adopt the most commonly used ADC 0809.
As shown in fig. 2 and 3, the air pressure digital signal obtained by the conversion of the analog-digital conversion circuit can be input into the controller 1 only after being converted into the switching signal, the switching signal is connected to the Xn pin of the controller 1, and the NPN proximity switches of the door proximity sensor 7 and the window proximity sensor 8 are also connected to the other Xn pin of the controller 1.
And the controller 1 outputs a switching signal through a Yn pin according to the input switching signal, and is used for adjusting the output voltage of the frequency converter 4-1 and changing the opening degree of the air volume adjusting valve 3.
The air pressure sensor 2 and the air quantity regulating valve 3 can be universal, and the frequency converter 4-1 can be matched with the negative pressure fan 4-2 according to the model.
Claims (5)
1. A negative pressure maintaining device for an epidemic prevention isolation room is characterized by comprising a controller (1), an air pressure sensor (2), an air volume adjusting valve (3) and a negative pressure device;
the air pressure sensor (2) is arranged in the epidemic prevention isolation room (5), and an air pressure acquisition signal output end of the air pressure sensor (2) is electrically connected with an air pressure acquisition signal input end of the controller (1);
the air volume adjusting valve (3) is arranged in an air duct (6) of the epidemic prevention isolation room (5), and the opening degree signal input end of the air volume adjusting valve (3) is electrically connected with the opening degree signal output end of the controller (1); when the opening degree of the air volume adjusting valve (3) is 0, the air duct (6) is closed;
the negative pressure device comprises a frequency converter (4-1) and a negative pressure fan (4-2);
the variable frequency signal input end of the frequency converter (4-1) is electrically connected with the variable frequency signal output end of the controller (1), and the motor speed regulation signal output end of the frequency converter (4-1) is electrically connected with the motor speed regulation signal input end of the motor of the negative pressure fan (4-2);
the negative pressure fan (4-2) is positioned outside the epidemic prevention isolation room (5), and the air inlet end of the negative pressure fan (4-2) is communicated with the air duct (6) and is used for extracting air in the epidemic prevention isolation room (5) to generate negative pressure.
2. The negative pressure maintaining device for the epidemic prevention isolation room according to claim 1, wherein the number of the air pressure sensors (2) is multiple, and the air pressure sensors are respectively positioned in the epidemic prevention isolation room (5) near the door or the window.
3. The negative pressure maintaining apparatus for an epidemic prevention compartment according to claim 1 or 2, further comprising a door proximity sensor (7) and a window proximity sensor (8);
the door proximity sensor (7) is arranged on a door leaf of the epidemic prevention isolation room (5), and a door switch signal output end of the door proximity sensor (7) is electrically connected with a door switch signal input end of the controller (1);
the window proximity sensor (8) is installed on a window sash of the epidemic prevention isolation room (5), and a window switch signal output end of the window proximity sensor (8) is electrically connected with a door switch signal input end of the controller (1).
4. The negative pressure maintaining apparatus for an epidemic prevention insulation room, according to claim 1, wherein the controller (1) is FX2N series controller.
5. Negative pressure maintaining device for an epidemic prevention compartment according to claim 3 or the above, characterized in that the door proximity sensor (7) and the window proximity sensor (8) are both NPN proximity switches of IFRM18N17A3/S14L type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021629847.3U CN212619028U (en) | 2020-08-07 | 2020-08-07 | Negative pressure maintaining device for epidemic prevention isolation room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021629847.3U CN212619028U (en) | 2020-08-07 | 2020-08-07 | Negative pressure maintaining device for epidemic prevention isolation room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212619028U true CN212619028U (en) | 2021-02-26 |
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ID=74713646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021629847.3U Expired - Fee Related CN212619028U (en) | 2020-08-07 | 2020-08-07 | Negative pressure maintaining device for epidemic prevention isolation room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212619028U (en) |
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2020
- 2020-08-07 CN CN202021629847.3U patent/CN212619028U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210226 Termination date: 20210807 |