Single-room pressure control system
By setting up air supply and exhaust control circuits in a single room and dynamically adjusting the air supply and exhaust volume, the problem of slow adjustment speed in the prior art is solved, and fast response and stable pressure differential control are achieved.
Patent Information
- Application Number
- CN202421839257.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-31
AI Technical Summary
In hospitals, pharmaceutical factories, etc., it is difficult to quickly respond to changes in pressure difference values inside and outside the room in hospitals, pharmaceutical factories, etc., which leads to slow adjustment speed and affects the use effect.
Set up a supply air control circuit, exhaust air control circuit and main control circuit in a single room. By detecting the air pressure difference value inside and outside the room, dynamically adjust the supply air volume and exhaust volume to quickly restore to the set value.
It realizes rapid response and stable adjustment of the pressure difference value inside and outside a single room, meeting the needs of use, faster adjustment speed and shorter response time.
Smart Images
Figure CN223077095U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fluid pressure control, in particular to a single-room pressure control system. Background Art
[0002] In the ventilation and air conditioning systems of rooms that require positive and negative pressure control in hospitals, pharmaceutical factories, food factories, etc., in order to adjust the pressure of each room, centralized control in the machine room (remote control) is generally adopted, using a combination of an electric control valve + a remote controller + a differential pressure sensor to adjust the opening of the electric control valve according to the overlimit of the indoor differential pressure.
[0003] The problem with this combination control is that once the maintenance structure in the room changes, or some rooms are closed for ventilation and disinfection, or the resistance of the supply / return air filters changes, it will cause a change in the differential pressure between the inside and outside of the room. However, through centralized control in the machine room (remote control), it is difficult to timely adjust the pressure in the room, the response speed is slow, and for rooms that are in use and require a certain pressure difference, it will affect the use. Content of the Utility Model
[0004] The utility model provides a single-room pressure control system, which enables the control and adjustment of the supply air volume and / or exhaust air volume of a single room to be more rapid, and the control and adjustment response time of the differential air pressure value between the inside and outside of a single room to be shorter, faster, and more stable.
[0005] To achieve the above object, the utility model adopts the following technical solutions:
[0006] A single-room pressure control system is arranged in a single-room area and is used to adjust the differential air pressure value between the inside and outside of a single room, including a main control device;
[0007] A detection component is used to detect the differential air pressure value between the inside and outside of the room;
[0008] A supply air control loop is arranged on the supply air duct and is used to control the supply air volume in the room;
[0009] An exhaust air control loop is arranged on the exhaust air duct and is used to control the exhaust air volume in the room;
[0010] The above main control device, the above detection component, the control device in the above supply air control loop, and the control device in the above exhaust air control loop form a main control loop to control the supply air volume and / or exhaust air volume in a single room;
[0011] The above main control device, the above detection component, the above supply air control loop, and the above exhaust air control loop are all arranged in a single-room area.
[0012] Preferably, the above supply air control loop includes a supply air control device and a supply air adjustment device;
[0013] The above-mentioned air supply control device and the above-mentioned air supply regulating device are electrically connected, and the main control device and the above-mentioned air supply control device are electrically connected.
[0014] Preferably, the above-mentioned air supply control loop further includes an air supply air volume sensor, and the air supply air volume sensor is electrically connected to the above-mentioned air supply control device;
[0015] The above-mentioned air supply control device, the above-mentioned air supply regulating device, and the above-mentioned air supply air volume sensor are all arranged on the air supply duct in a single room area.
[0016] Preferably, the above-mentioned exhaust control loop includes an exhaust control device and an exhaust regulating device;
[0017] The above-mentioned exhaust control device and the above-mentioned exhaust regulating device are electrically connected, and the main control device and the above-mentioned exhaust control device are electrically connected.
[0018] Preferably, the above-mentioned exhaust control loop further includes an exhaust air volume sensor, and the exhaust air volume sensor is electrically connected to the above-mentioned exhaust control device;
[0019] The above-mentioned exhaust control device, the above-mentioned exhaust regulating device, and the above-mentioned exhaust air volume sensor are all arranged on the exhaust duct in a single room area.
[0020] Preferably, the above-mentioned detection component includes a differential pressure sensor, and two pressure ports of the differential pressure sensor are respectively connected with a first pipeline and a second pipeline;
[0021] One end of the first pipeline far away from the differential pressure sensor is located outside the room, and one end of the second pipeline far away from the differential pressure sensor is located inside the room.
[0022] Preferably, it further includes a control panel, and the control panel is electrically connected to the main control device, the control device in the above-mentioned air supply control loop, and the control device in the above-mentioned exhaust control loop.
[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0024] 1. When a single room has been used for a long time and once the enclosure structure changes, this system sets three loops including an air supply control loop, an exhaust control loop, and a main control loop in the single room to cooperate with each other to dynamically adjust the pressure difference between the inside and outside of the single room, so that it is restored to the set value. Compared with the remote centralized control of the pressure difference between the inside and outside of a certain room in the machine room, the response time is shorter and the adjustment speed is faster, so that the pressure difference between the inside and outside of the single room can be timely adjusted to the set value to meet the use requirements.
[0025] 2. When the air pressure in the main air supply duct and / or the main air exhaust duct changes and the pressure difference between the inside and outside of the room fluctuates, the air supply control loop and the air exhaust control loop will automatically adjust, respectively adjusting the opening degree of the valves therein to keep the air supply volume and the air exhaust volume still maintained at the initial set value, so that the pressure difference in the room does not change and the adjustment is faster. Brief Description of the Drawings
[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0027] Figure 1 It is a schematic diagram of the overall system of the embodiment in the present invention.
[0028] Description of the reference numerals:
[0029] 1. Air supply control loop; 11. Air supply control device; 12. Air supply adjustment device; 13. Air supply volume sensor; 2. Air exhaust control loop; 21. Air exhaust control device; 22. Air exhaust adjustment device; 23. Air exhaust volume sensor; 3. Main control loop; 31. Main control device; 32. Pressure difference sensor; 33. First pipeline; 34. Second pipeline; 4. Air supply duct; 5. Air exhaust duct; 6. Single room area; 7. Room. Detailed Embodiments
[0030] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.
[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0033] As Figure 1 shown, the embodiment of the present utility model provides a single-room pressure control system, which is arranged in a single room area 6 and is used to adjust the air pressure difference inside and outside the single room 7. Specifically, it includes a supply air control loop 1, an exhaust air control loop 2, and a main control loop 3. All three loops are arranged in the single room area 6. Among them, the supply air control loop 1 is used to control the supply air volume of the single room 7 and is installed on the supply air duct 4 arranged in the single room area 6. The exhaust air control loop 2 is used to control the exhaust air volume of the single room 7 and is installed on the exhaust air duct 5 in the single room area 6. In the actual adjustment process, only the supply air volume and the exhaust air volume in the single room 7 need to be controlled to control the pressure difference inside and outside the room 7, so that the internal use pressure of the room 7 can meet the use requirements relative to the outside. Therefore, the main control loop 3 is used to dynamically adjust the supply air volume and / or the exhaust air volume according to the actually measured pressure difference inside and outside the room 7. Once the pressure difference deviates from the set value, the pressure difference between the inside and outside of the room 7 can reach the set value required for use. Among them, the main control loop 3 includes a main control device 31, a detection component, a control device in the supply air control loop 1, and a control device of the exhaust air control loop 2. The detection component is used to detect the air pressure difference inside and outside the single room 7. The main control device 31 is a local controller in the single room area 6 and is used to control the supply air volume of the supply air control loop 1 and the exhaust air volume of the exhaust air control loop 2 according to the data detected by the detection component. Specifically, during the long-term use of the room, once the pressure difference changes due to the change of the enclosure structure of the room 7 (such as air leakage from the window or replacement of the window), the detection component detects that the air pressure difference inside and outside the room 7 changes and deviates from the set value (the required pressure difference for the use of the room 7, which is set in advance). The detection component feeds back the actually detected air pressure difference inside and outside the room 7 to the main control device 31. Then, the main control device 31 compares the real-time value with the set pressure difference and, according to the comparison result, feeds back to the control device in the supply air control loop 1 and the control device of the exhaust air control loop 2 to re-adjust the constant value of the supply air volume of the supply air duct 4 and / or the constant value of the exhaust air volume of the exhaust air duct 5, and finally makes it reach the set value of the pressure difference in the system. It should be noted that in this embodiment, at the beginning of operation, the supply air volume controlled by the supply air control loop 1 on the supply air duct 4 and the supply air volume controlled by the exhaust air control loop 2 on the exhaust air duct 5 are set as fixed values. As long as the supply air volume and the exhaust air volume of the room do not change, the pressure difference inside and outside the room 7 will not change.
[0034] Specifically, the adjustment of the pressure difference between the inside and outside of a single room is divided into three cases. The first case: The supply air control loop 1 keeps a constant supply air volume and is controlled by itself. The main control device 31 only needs to feedback the adjustment method to the control device of the exhaust air control loop 2 and adjust the actuator of the exhaust air control loop 2 to correspondingly adjust the exhaust air volume. For example, if there is a positive pressure in room 7 and the pressure difference between the inside of room 7 and the outside of room 7 becomes smaller, only the exhaust air volume needs to be reduced. At this time, the constant value of the supply air volume remains unchanged, and the constant value of the exhaust air volume changes. The second case: The exhaust air control loop 2 keeps a constant exhaust air volume and is controlled by itself. The main control device 31 only needs to feedback the adjustment method to the control device of the supply air control loop 1 and adjust the actuator of the supply air control loop 1 to correspondingly adjust the supply air volume. For example, if there is a positive pressure in room 7 and the pressure difference between the inside of room 7 and the outside of room 7 becomes smaller, only the supply air volume needs to be increased. At this time, the constant value of the supply air volume changes, and the constant value of the exhaust air volume remains unchanged. The third case: The main control device 31 feedbacks the adjustment method to the control devices of the supply air control loop 1 and the exhaust air control loop 2, and adjusts the actuators of the supply air control loop 1 and the exhaust air control loop 2 to correspondingly adjust the supply air volume and the exhaust air volume. For example, if there is a positive pressure in room 7 and the pressure difference between the inside of room 7 and the outside of room 7 becomes smaller, it is necessary to increase the supply air volume and reduce the exhaust air volume to finally reach the set pressure difference. At this time, both the constant value of the supply air volume and the constant value of the exhaust air volume change. Of course, the above control and adjustment methods are all prior arts, and here is only for detailed description of the usage process.
[0035] Of course, in actual use, there is usually another frequently used situation, that is, when the air pressure in the main supply air duct and / or the main exhaust air duct changes (such as when other rooms are closed for disinfection or the resistance of the duct filter increases), the pressure difference between the inside and outside of the room will fluctuate. At this time, the supply air control loop 1 and the exhaust air control loop 2 will automatically adjust and respectively adjust the opening degree of the valves inside them, so that the supply air volume and the exhaust air volume still maintain the initial set values, and the pressure difference inside a single room 7 does not change.
[0036] It should be noted that the main control device 31 detecting that the pressure difference deviates from the set value refers to the range value outside the set value. Usually, when designing, a positive and negative range value will be reserved outside the set value. As long as it is within this range value, the main control device 31 does not adjust the constant value of the supply air volume and / or the constant value of the exhaust air volume. At this time, only the supply air control loop 1 and the exhaust air control loop 2 need to automatically and dynamically adjust themselves so that the supply air volume and the exhaust air volume still maintain the initial set values.
[0037] Wherein, the single room area 6 among the above includes the entire room 7 and a partial area outside the room 7. Specifically, the partial area outside the room 7 can be an area within 1 meter outside the room 7. For example, the air supply control loop 1 is installed on the air supply duct 4 within the single room area 6. Specifically, the air supply control loop 1 can be installed on the air supply duct 4 within the room 7, or can also be installed on the air supply duct 4 outside the room 7 (the partial area outside the room 7). Similarly, the installation method of the exhaust control loop 2 is the same, such that the air supply control loop 1, the exhaust control loop 2, and the main control loop 3 are located at the controlled room 7, realizing the control of the local air intake volume and exhaust volume.
[0038] This system sets up three loops including the air supply control loop 1, the exhaust control loop 2, and the main control loop 3 within the single room area 6. The three loops cooperate with each other, and the main control device 31 conducts local control, dynamically adjusting the pressure difference inside and outside the single room 7 to finally restore it to the set value. Compared with the remote centralized control of the pressure difference inside and outside a certain room 7 in the machine room, the response and adjustment speed are faster, enabling the pressure difference inside and outside the single room 7 to be timely regulated to the set value to meet the usage requirements. Moreover, the machine room remotely controls and adjusts multiple rooms 7, while this system only controls a single room 7, and the adjustment process is more stable, and the pressure difference inside and outside the room 7 is more stable after adjustment. Also, for general usage situations, that is, when the air pressure of the main air supply duct and / or the main exhaust duct changes (such as when other rooms are closed for disinfection or the resistance of the duct filter increases), the air supply control loop 1 and the exhaust control loop 2 will automatically adjust, enabling the air supply volume and exhaust volume to quickly recover and maintain at the set value, thereby restoring the pressure difference inside the single room 7 to the set value.
[0039] Specifically, the air supply control loop 1 includes an air supply control device 11 and an air supply adjustment device 12. Among them, the air supply control device 11 and the air supply adjustment device 12 are electrically connected. The air supply control device 11 controls the opening adjustment of the air supply adjustment device 12, thereby adjusting the air supply volume. The main control device 31 and the air supply control device 11 are electrically connected. The main control device 31 transmits a control signal to the air supply control device 11, and then the air supply control device 11 adjusts the air supply adjustment device 12 to conduct the adjustment of the air supply volume. Moreover, the air supply control loop 1 further includes an air supply volume sensor 13. The air supply volume sensor 13 is electrically connected to the air supply control device 11. The air supply volume sensor 13 can detect the real-time air supply volume. Thus, during the adjustment process of the air supply adjustment device 12, it can know the air supply volume in real time. Therefore, when the air pressure of the main air supply duct changes and the air supply volume in the air supply duct 4 changes, when the air supply volume sensor 13 detects a deviation from the set air supply volume value, it will feedback to the air supply control device 11, and the air supply control device 11 will control the opening adjustment of the air supply adjustment device 12 to adjust the air supply volume, finally enabling the air supply volume to reach the set value. However, the above control and adjustment methods are all prior arts, and are only for explaining the usage process here.
[0040] Of course, in this embodiment, the air supply regulating device 12 can adopt an existing electric control valve, and the control element of the electric control valve is electrically connected to the air supply control device 11. Specifically, in this embodiment, the air supply control device 11, the air supply regulating device 12, and the air supply air volume sensor 13 are all arranged on the air supply duct 4 in the room 7.
[0041] Specifically, the exhaust air control loop 2 includes an exhaust air control device 21 and an exhaust air regulating device 22. The exhaust air control device 21 and the exhaust air regulating device 22 are electrically connected. The exhaust air control device 21 controls the opening degree adjustment of the exhaust air regulating device 22, thereby adjusting the exhaust air volume. The main control device 31 and the exhaust air control device 21 are electrically connected. The main control device 31 transmits a control signal to the exhaust air control device 21, and then the control device adjusts the exhaust air regulating device 22 to adjust the exhaust air volume. Moreover, the exhaust air control loop 2 further includes an exhaust air volume sensor 23. The exhaust air volume sensor 23 is electrically connected to the exhaust air control device 21. The exhaust air volume sensor 23 can detect the real-time exhaust air volume. Thus, during the adjustment process of the exhaust air regulating device 22, it can know the exhaust air volume in real time. Therefore, when the wind pressure of the main exhaust duct changes and the exhaust air volume in the exhaust duct 5 changes, when the exhaust air volume sensor 23 detects a deviation from the set exhaust air volume value, it will feedback to the exhaust air control device 21, and the exhaust air control device 21 will control the opening degree adjustment of the exhaust air regulating device 22 to adjust the exhaust air volume, and finally make the exhaust air volume reach the set value. Of course, the above control and adjustment methods are all prior arts, and are only used to illustrate the usage process here.
[0042] Of course, in this embodiment, the exhaust air regulating device 22 can adopt an existing electric control valve, and the control element of the electric control valve is electrically connected to the exhaust air control device 21. Specifically, in this embodiment, the exhaust air control device 21, the exhaust air regulating device 22, and the exhaust air volume sensor 23 are all arranged on the exhaust duct 5 in the room 7.
[0043] Of course, in another embodiment, the air supply control loop 1 can only include the air supply regulating device 12 and the air supply air volume sensor 13. The air supply regulating device 12 and the air supply air volume sensor 13 are both electrically connected to the main control device 31 to form a control loop to dynamically adjust the air supply volume. Correspondingly, the exhaust air control loop 2 can only include the exhaust air regulating device 22 and the exhaust air volume sensor 23. The exhaust air regulating device 22 and the exhaust air volume sensor 23 are both electrically connected to the main control device 31 to form a control loop to dynamically adjust the exhaust air volume. The specific control and adjustment methods are the same as those of the air supply control device 11 and the exhaust air control device 21 in this embodiment, and will not be elaborated here. They are all prior arts.
[0044] Specifically, the detection component includes a differential pressure sensor 32. The two pressure ports of the differential pressure sensor 32 are respectively connected to a first pipeline 33 and a second pipeline 34. One end of the first pipeline 33 away from the differential pressure sensor 32 is located outside the room 7, and one end of the second pipeline 34 away from the differential pressure sensor 32 is located inside the room 7, so as to obtain the air pressure values inside and outside the room 7 respectively. Thus, the differential pressure sensor 32 can detect the air pressure difference between inside and outside the room 7. Specifically, the differential pressure sensor 32 can be set either inside the room 7 or in the area outside the room 7, as long as the air inlet of the first pipeline 33 is located outside the room 7 and the air inlet of the second pipeline 34 is located inside the room 7. In this embodiment, the differential pressure sensor 32 is set inside the room 7.
[0045] Preferably, it further includes a control panel, which is electrically connected to the main control device 31, the control device in the air supply control loop 1 and the control device in the exhaust control loop 2. It can be used to obtain data such as the air supply volume, the air outlet volume, and the real-time pressure difference between inside and outside the room 7 and display them on the control panel for the user to know and observe. Moreover, the user can also set the real-time values of the air supply volume, the air outlet volume, and the required pressure difference between inside and outside the room 7 according to their own usage needs through the control panel, making it more convenient to use. In this embodiment, the control panel can be set on the outer wall of the room 7.
[0046] The above-mentioned implementation manners are only the preferred implementation manners of the present invention and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the protection scope required by the present invention.
Claims
1. A single-room pressure control system is provided within a single room area for adjusting the air pressure difference between the inside and outside of the single room. It is characterized in that including; a main control device; a detection component for detecting the air pressure difference between inside and outside of the room; a supply air control circuit provided on the supply air duct for controlling the supply air volume in the room; an exhaust air control circuit provided on the exhaust air duct for controlling the exhaust air volume in the room; the main control device, the detection component, the control device in the supply air control circuit and the control device in the exhaust air control circuit form a main control circuit to control the supply air volume and / or exhaust air volume in a single room; the main control device, the detection component, the supply air control circuit and the exhaust air control circuit are all provided in the area of the single room.
2. The single-room pressure control system according to claim 1, characterized in that, the supply air control circuit includes a supply air control device and a supply air regulating device; the supply air control device and the supply air regulating device are electrically connected, and the main control device and the supply air control device are electrically connected.
3. The single-room pressure control system according to claim 2, wherein the supply air control circuit further includes a supply air volume sensor, and the supply air volume sensor is electrically connected to the supply air control device; the supply air control device, the supply air regulating device and the supply air volume sensor are all provided on the supply air duct in the area of the single room.
4. The single-room pressure control system according to claim 1, wherein the exhaust air control circuit includes an exhaust air control device and an exhaust air regulating device; the exhaust air control device and the exhaust air regulating device are electrically connected, and the main control device and the exhaust air control device are electrically connected.
5. The single-room pressure control system according to claim 4, characterized in that, the exhaust air control circuit further includes an exhaust air volume sensor, and the exhaust air volume sensor is electrically connected to the exhaust air control device; the exhaust air control device, the exhaust air regulating device and the exhaust air volume sensor are all provided on the exhaust air duct in the area of the single room.
6. The single-room pressure control system according to claim 1, characterized in that, the detection component includes a differential pressure sensor, and two pressure ports of the differential pressure sensor are respectively connected with a first pipeline and a second pipeline; one end of the first pipeline far away from the differential pressure sensor is located outside the room, and one end of the second pipeline far away from the differential pressure sensor is located inside the room.
7. The single-room pressure control system according to any one of claims 1-6, characterized in that, it further includes a control panel, and the control panel is electrically connected to the main control device, the control device in the supply air control circuit and the control device in the exhaust air control circuit.