Negative pressure wards and ventilation control methods used in peacetime and epidemic situations

Abstract

The present invention discloses a negative pressure ward used in combination with peacetime and epidemics, including a medical corridor, a ward, a patient corridor, and a buffer room. The power distributed ventilation system includes a main fresh air fan, a fresh air control module, a main exhaust fan, an exhaust control module, a pressure difference sensor for monitoring the pressure difference between the ward and the corresponding buffer room, and an air quality sensor for monitoring the air quality condition in the ward; at the same time, the present invention also discloses a ventilation control method for a negative pressure ward used in combination with peacetime and epidemics. When used as a negative pressure ward, the exhaust control module can adjust the exhaust volume in conjunction with the feedback signal of the pressure difference sensor to ensure that the designed pressure difference can be restored to normal immediately after being destroyed to prevent cross infection; when used as an ordinary ward, the fresh air control module can adjust the fresh air volume in conjunction with the feedback signal of the air quality sensor, and then the exhaust control module can be linked to adjust the exhaust volume, which can ensure that energy consumption is reduced when used as an ordinary ward.

Description

Technical Field

[0001] The present invention relates to the field of fresh air systems and control technology, and specifically to a negative pressure ward used in combination with peacetime and epidemic situations, and a ventilation control method for the negative pressure ward used in combination with peacetime and epidemic situations, which is suitable for negative pressure wards and negative pressure isolation wards. Background Art

[0002] Negative pressure wards (including "negative pressure isolation wards") are places for treating patients with respiratory infections. The requirements for ventilation systems are quite different from those for ordinary wards and other functional places. For example, there are strict pressure gradient requirements, and the minimum fresh air volume requirement is more than three times that of ordinary wards. When negative pressure wards do not need to treat patients with respiratory infections, but are used as ordinary wards or other functional rooms, the use mode and control of their ventilation systems will cause huge energy waste.

[0003] In addition, as a negative pressure ward, pressure differential control is the most important factor in controlling pollution. The current ventilation system mostly uses a constant air volume valve, and the system operates at a constant air volume while ensuring the designed pressure differential. However, in actual use, the doors and windows in the ward are often opened and closed, and the designed pressure differential will be instantly destroyed. The pressure differential of the constant air volume ventilation system recovers slowly. Since the pressure differential between the areas cannot be restored in time, it cannot operate at a constant pressure differential, which can easily lead to cross infection. Summary of the invention

[0004] The present invention aims to provide a negative pressure ward that can be used in combination with peacetime and epidemic situations. It can be used as a negative pressure ward in epidemic situations and as an ordinary ward in normal situations. It can ensure that the designed pressure difference can be immediately restored to normal after being destroyed when used as a negative pressure ward to prevent cross infection, and can also ensure that energy consumption can be reduced when used as an ordinary ward.

[0005] To this end, the technical solution adopted by the present invention is: a negative pressure ward used in combination with peacetime and epidemic prevention, comprising a medical corridor, a ward, a patient corridor and a power distributed ventilation system, a buffer room is provided between the medical corridor and the ward, the power distributed ventilation system comprises a fresh air system and an exhaust system, the fresh air system comprises a main fresh air fan, and a fresh air control module corresponding to each ward one by one, the exhaust system comprises a main exhaust fan, and an exhaust control module corresponding to each ward one by one, the power distributed ventilation system also comprises a pressure difference sensor for monitoring the pressure difference between the ward and the corresponding buffer room, an air quality sensor for monitoring the air quality condition in the ward, the pressure difference sensor is electrically connected to the corresponding exhaust control module, and the air quality sensor is electrically connected to the corresponding fresh air control module and exhaust control module.

[0006] As a preferred embodiment of the above scheme, each of the wards is equipped with a bathroom and a bathroom exhaust control module. The bathroom is separately equipped with an exhaust control module for separate control to improve ventilation effect.

[0007] Further preferably, every two adjacent wards are arranged symmetrically as a group and share a buffer room, and the buffer room and the two toilets of the group of wards are arranged in sequence from the medical corridor to the patient corridor.

[0008] At the same time, the present invention also discloses a ventilation control method for a negative pressure ward used in combination with peacetime and epidemics, comprising the negative pressure ward used in combination with peacetime and epidemics as described above;

[0009] When the ward is used as a negative pressure ward under an epidemic situation, the fresh air system of the power distributed ventilation system adopts a fixed fresh air volume and variable exhaust air volume control mode, and sets the pressure difference gradient range of the buffer room and the ward under negative pressure to ensure the formation of directional airflow in the medical corridor, buffer room, ward, and patient corridor. When the pressure difference sensor detects that the pressure difference between the ward and the corresponding buffer room is higher or lower than the set pressure difference gradient range, the exhaust control module in the ward is immediately linked to reduce or increase the air volume until it returns to the normal pressure difference gradient range;

[0010] When the ward is used as an ordinary ward under normal circumstances, the fresh air system of the power distributed ventilation system adopts variable fresh air volume and variable exhaust air volume control mode, and sets the air quality parameters of the ward. When the air quality sensor monitors that the air quality in the ward is better than or equal to the set value, the fresh air system and the exhaust system operate normally. When the air quality sensor monitors that the air quality in the ward is worse than the set value, the fresh air control module in the ward is immediately linked to increase the fresh air volume, and then the exhaust control module in the ward is linked to increase the exhaust volume, until the air quality sensor monitors that the air quality in the ward returns to normal.

[0011] As the preferred ventilation control method for the negative pressure wards used in the combination of peace and epidemic, in the combination of peace and epidemic, the main fresh air fan and the main exhaust fan of the power distributed ventilation system are controlled by the total air volume control method, that is, when the actual operating total air volume of each is monitored to be different from the superimposed air volume of all fresh air and exhaust control modules on the pipeline, the signal voltage of the corresponding main fresh air fan or main exhaust fan is adjusted to increase or decrease the operating air volume. The air volumes of the air supply and exhaust control modules in all wards monitored are superimposed, and the superimposed value is compared with the operating air volume value of the main supply and exhaust fans, and the total supply and exhaust air volumes are adjusted to ensure the system's on-demand air supply and exhaust.

[0012] It is further preferred that each of the wards is equipped with a toilet and a toilet exhaust control module. When debugging the system, the pressure difference between the toilet and the corresponding ward is adjusted to ensure that the airflow in the toilet does not flow back into the ward.

[0013] Beneficial effects of the present invention: A pressure difference sensor is added to monitor the pressure difference between the ward and the corresponding buffer room, and an air quality sensor is used to monitor the air quality in the ward. When used as a negative pressure ward, the exhaust control module can be combined with the feedback signal of the pressure difference sensor to adjust the exhaust volume, ensuring that the designed pressure difference can be restored to normal immediately after being destroyed when used as a negative pressure ward to prevent cross infection; when used as an ordinary ward, the fresh air control module can be combined with the feedback signal of the air quality sensor to adjust the fresh air volume, and then the exhaust control module is linked to adjust the exhaust volume, which can ensure that the negative pressure ward reduces energy consumption when used as an ordinary ward. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a negative pressure ward used in both peacetime and epidemic situations.

[0015] Figure 2 This is the control logic diagram for the negative pressure ward used in combination with peacetime and epidemic situations.

[0016] Figure 3 This is the control logic diagram for using the negative pressure ward used in peacetime and epidemic situations as a normal ward. DETAILED DESCRIPTION

[0017] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0018] like Figure 1 As shown, a negative pressure ward used in combination with peacetime and epidemic situations is mainly composed of a medical corridor 1, a ward 2, a patient corridor 3, a buffer room 4, and a power distributed ventilation system.

[0019] Each ward 2 is equipped with a buffer room 4 , which is located between the medical corridor 1 and the ward 2 .

[0020] The power distributed ventilation system mainly consists of two parts: the fresh air system and the exhaust system. The fresh air system mainly consists of the main fresh air fan 5 and the fresh air control module 6 corresponding to each ward 2. The exhaust system mainly consists of the main exhaust fan 7 and the exhaust control module 8 corresponding to each ward 2.

[0021] In addition, the power distributed ventilation system also includes a pressure difference sensor 9 for monitoring the pressure difference between the ward 2 and the corresponding buffer chamber 4, and an air quality sensor 10 for monitoring the air quality in the ward 2. The pressure difference sensor 9 is electrically connected to the corresponding exhaust control module 8 to control the exhaust of the ward 2. The air quality sensor 10 is electrically connected to the corresponding fresh air control module 6 and exhaust control module 8 to control the air intake and exhaust of the ward 2.

[0022] When the ward 2 is used as a negative pressure ward in an epidemic situation, the pressure difference sensor 9 performs pressure difference monitoring. When the ward 2 is used as a common ward in normal circumstances, the air quality sensor 10 performs air quality monitoring.

[0023] Each two adjacent wards 2 are symmetrically arranged as a group and share a buffer room 4, and the buffer room 4 and the two toilets 11 of the group of wards 2 are arranged in sequence along the medical corridor 1 to the patient corridor 3 to optimize the overall space layout.

[0024] Each ward 2 is preferably equipped with a toilet 11 and a toilet exhaust control module 12. The toilet exhaust control module 12 is connected to the exhaust system as a part of the exhaust system. When used as a negative pressure ward, the toilet exhaust control module 12 operates at a constant air volume; when used as an ordinary ward, the toilet exhaust control module 12 can be divided into different air volume operation conditions during the day and at night to further save energy.

[0025] A ventilation control method for a negative pressure ward used in combination with peacetime and epidemic situations, comprising the above-mentioned negative pressure ward used in combination with peacetime and epidemic situations.

[0026] Combination Figure 1 , Figure 2 As shown, when ward 2 is used as a negative pressure ward under an epidemic situation, the fresh air system of the power distributed ventilation system adopts a fixed fresh air volume and variable exhaust air volume control mode, and sets the pressure gradient range of the buffer room 4 and ward 2 under negative pressure to ensure the formation of directional airflow in the medical corridor 1, buffer room 4, ward 2, and patient corridor 3. In the case of an epidemic, a fixed fresh air volume control is adopted to ensure that the fresh air volume is sufficient, and the pressure gradient only needs to be controlled within the set range by the exhaust air volume.

[0027] When the pressure difference sensor 9 detects that the pressure difference between the ward 2 and the corresponding buffer chamber 4 is higher or lower than the set pressure difference gradient range, the exhaust control module 8 in the ward 2 is immediately linked to reduce or increase the air volume until each area returns to the normal pressure difference gradient range. When the doors and windows of the ward are opened, the exhaust control module in the ward is immediately linked to reduce or increase the air volume, and the pressure difference in each area is immediately constant to avoid cross infection caused by the backflow of polluted airflow. Under normal circumstances, the power distributed ventilation system operates in a fresh air volume and exhaust air volume mode that meets the air volume specified in the specifications and ensures the gradient pressure difference requirements of the ward.

[0028] Combination Figure 1 , Figure 3 As shown, when Ward 2 is used as a common ward under normal circumstances, air quality and energy-saving operation control are achieved. In order to ensure the air quality in the ward and save the operating energy consumption of the system, the fresh air system of the power distributed ventilation system adopts variable fresh air volume and variable exhaust air volume control mode, and sets the air quality parameters of Ward 2.

[0029] When the air quality sensor 10 detects that the air quality in ward 2 is better than or equal to the set value, the fresh air system and the exhaust system operate normally; when the air quality sensor 10 detects that the air quality in ward 2 is worse than the set value, such as when the air quality sensor 10 detects that the carbon dioxide concentration exceeds 1000ppm, the fresh air control module 6 in ward 2 is immediately linked to increase the fresh air volume, and then the exhaust control module 8 in ward 2 is linked to increase the exhaust volume, so as to quickly meet the air quality requirements in the ward until the air quality sensor 10 detects that the air quality in ward 2 returns to normal. After the air quality returns to normal, the fresh air and exhaust systems return to the set normal small air volume operation, which not only ensures air quality, but also saves operating energy consumption.

[0030] Preferably, combined with Figure 2 , Figure 3 As shown, in the two cases of combined use of peacetime and epidemic prevention, the main fresh air fan 5 and the main exhaust fan 7 of the power distributed ventilation system are respectively controlled by the total air volume control method, that is, when it is monitored that there is a deviation between the actual operating total air volume of each and the superimposed air volume of all fresh air control modules on the pipeline, the signal voltage of the corresponding main fresh air fan 5 or the main exhaust fan 7 is adjusted to control the increase or decrease of the operating air volume.

[0031] In addition, considering that the degree of contamination of the bathroom 11 is higher than that of the ward 2 , the pressure difference between the bathroom 11 and the corresponding ward 2 is adjusted during system debugging to ensure that the airflow of the bathroom 11 does not flow back to the ward 2 .

[0032] A power distributed ventilation system can meet the room requirements in two different usage modes, peacetime and epidemic, through a control system. Each ward can be adjusted independently, and the adjustment changes in one ward will not affect other wards.

Claims

1. A ventilation control method for a negative pressure ward used in combination with normal and epidemic situations, characterized in that: A negative pressure ward for combined use in peacetime and epidemics is provided; the negative pressure ward for combined use in peacetime and epidemics comprises a medical corridor (1), a ward (2), a patient corridor (3) and a power distributed ventilation system, wherein a buffer chamber (4) is provided between the medical corridor (1) and the ward (2), the power distributed ventilation system comprises a fresh air system and an exhaust air system, the fresh air system comprises a main fresh air fan (5), and a fresh air control module (6) corresponding to each ward (2), the exhaust air system comprises a main exhaust fan (7), and an exhaust air control module (8) corresponding to each ward (2), and the power distributed ventilation system is characterized in that: the power distributed ventilation system further comprises a pressure difference sensor (9) for monitoring the pressure difference between the ward (2) and the corresponding buffer chamber (4), an air quality sensor (10) for monitoring the air quality condition in the ward (2), the pressure difference sensor (9) is electrically connected to the corresponding exhaust air control module (8), and the air quality sensor (10) is electrically connected to the corresponding fresh air control module (6) and the exhaust air control module (8); Each of the wards (2) is equipped with a toilet (11) and a toilet exhaust control module (12). During system commissioning, the pressure difference between the toilet (11) and the corresponding ward (2) is adjusted to ensure that the airflow of the toilet (11) does not flow back into the ward (2); When the ward (2) is used as a negative pressure ward under an epidemic situation, the fresh air system of the power distributed ventilation system adopts a fixed fresh air volume and variable exhaust air volume control mode, and sets the pressure difference gradient range of the buffer room (4) and the ward (2) under negative pressure to ensure the formation of directional airflow in the medical corridor (1), the buffer room (4), the ward (2), and the patient corridor (3). When the pressure difference sensor (9) detects that the pressure difference between the ward (2) and the corresponding buffer room (4) is higher or lower than the set pressure difference gradient range, the exhaust air control module (8) in the ward (2) is immediately linked to reduce or increase the air volume until it returns to the normal pressure difference gradient range; When the ward (2) is used as an ordinary ward under normal circumstances, the fresh air system of the power distributed ventilation system adopts a variable fresh air volume and variable exhaust air volume control mode, and sets the air quality parameters of the ward (2). When the air quality sensor (10) detects that the air quality of the ward (2) is better than or equal to the set value, the fresh air system and the exhaust air system operate normally. When the air quality sensor (10) detects that the air quality of the ward (2) is worse than the set value, the fresh air control module (6) in the ward (2) is immediately linked to increase the fresh air volume, and then the exhaust air control module (8) in the ward (2) is linked to increase the exhaust air volume, until the air quality sensor (10) detects that the air quality of the ward (2) returns to normal.

2. A ventilation control method for a negative pressure ward used in combination with peacetime and epidemic situations according to claim 1, characterized in that: In both normal and epidemic situations, the main fresh air fan (5) and the main exhaust fan (7) of the power distributed ventilation system are controlled by the total air volume control method, that is, when it is monitored that the actual total operating air volume of each of them deviates from the superimposed air volume of all fresh air and exhaust air control modules on the pipeline, the signal voltage of the corresponding main fresh air fan (5) or main exhaust fan (7) is adjusted to control the increase or decrease of the operating air volume.

3. The ventilation control method for negative pressure wards used in both peacetime and epidemic situations according to claim 1, characterized in that: Each pair of adjacent wards (2) is symmetrically arranged as a group and shares a buffer room (4), and the buffer room (4) and the two toilets (11) of the group of wards (2) are arranged in sequence along the medical corridor (1) to the patient corridor (3).

Images