CN110836431A - Indoor ventilation system and control method thereof - Google Patents
Indoor ventilation system and control method thereof Download PDFInfo
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- CN110836431A CN110836431A CN201810939712.8A CN201810939712A CN110836431A CN 110836431 A CN110836431 A CN 110836431A CN 201810939712 A CN201810939712 A CN 201810939712A CN 110836431 A CN110836431 A CN 110836431A
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- air
- spraying chamber
- exhaust
- pressure value
- air inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
Abstract
The invention provides an indoor ventilation system and a control method thereof, wherein the indoor ventilation system is applied to a spraying room and comprises the following steps: the air inlet mechanism is connected with the spraying chamber and used for conveying air outside the spraying chamber into the spraying chamber; the air exhaust mechanism is connected with the spraying chamber and used for exhausting air in the spraying chamber to the outside of the spraying chamber; the air pressure sensor is arranged in the spraying chamber and used for detecting the air pressure value in the spraying chamber; and the controller is used for controlling the air inlet mechanism and/or the air exhaust mechanism to act according to the air pressure value detected by the air pressure sensor so as to enable the air pressure in the spraying chamber to be within a preset negative pressure range. The indoor ventilation system and the control method thereof provided by the invention can ensure that the problem that the working efficiency of the spraying chamber is influenced because the negative pressure of the spraying chamber is too high or too low in the ventilation process of the spraying chamber can not occur.
Description
Technical Field
The invention relates to the technical field of indoor air treatment, in particular to an indoor ventilation system and a control method thereof.
Background
The indoor ventilation system is composed of a fresh air system and an exhaust system, the fresh air system is used for introducing outdoor air into a room, and the exhaust system is used for exhausting the indoor air out of the room, so that ventilation circulation of the indoor air and the outdoor air is completed. The indoor ventilation system can facilitate indoor air purification and improve the comfort level of indoor personnel, and is widely applied to public places such as markets, factories and the like.
However, the indoor ventilation system in the prior art only has a ventilation function, and when the indoor air pressure changes greatly, the working efficiency of the painting room is reduced due to the change of the indoor air pressure for the painting room.
Disclosure of Invention
The embodiment of the invention provides an indoor ventilation system and a control method thereof, which aim to solve the problems that the indoor air pressure of the existing indoor ventilation system is unstable and the working efficiency of a spraying chamber is low.
In a first aspect, an embodiment of the present invention provides an indoor ventilation system, which is applied to a spray booth, and includes:
the air inlet mechanism is connected with the spraying chamber and used for conveying air outside the spraying chamber into the spraying chamber;
the air exhaust mechanism is connected with the spraying chamber and used for exhausting air in the spraying chamber to the outside of the spraying chamber;
the air pressure sensor is arranged in the spraying chamber and used for detecting the air pressure value in the spraying chamber;
and the controller is used for controlling the air inlet mechanism and/or the air exhaust mechanism to act according to the air pressure value detected by the air pressure sensor so as to enable the air pressure in the spraying chamber to be within a preset negative pressure range.
Optionally, the air inlet mechanism includes: the air inlet assembly is communicated with the air inlet pipeline and used for conveying air outside the spraying chamber to the spraying chamber under the control of the controller, and the air inlet pipeline is used for conveying the air conveyed by the air inlet assembly;
the exhaust mechanism includes: the air exhaust assembly is connected with the air exhaust pipeline and used for exhausting air in the spraying chamber to the outside of the spraying chamber under the control of the controller, and the air exhaust pipeline is used for transmitting the air exhausted by the air exhaust assembly.
Optionally, the air intake mechanism further includes an electric valve, and the electric valve is used for adjusting the intake volume of the air intake duct under the control of the controller.
Optionally, the air inlet subassembly includes first fan and filter group, first fan be used for with air transport outside the spraying chamber extremely in the spraying chamber, the filter group is used for right the air that first fan carried purifies the filtration.
Optionally, the air intake assembly further comprises a heater and/or a humidifier; the heater is used for heating the air conveyed by the first fan, and the humidifier is used for humidifying the air conveyed by the first fan.
Optionally, the air inlet pipeline comprises a plurality of air inlet branches connected with the spraying chamber, and the air outlet pipeline comprises a plurality of air outlet branches connected with the spraying chamber;
the air outlets of the air inlet branches and the air inlets of the air exhaust branches are arranged in a staggered mode.
Optionally, the air exhaust assembly includes a second fan, and the second fan is used for exhausting air in the spraying chamber to the outside of the spraying chamber.
In a second aspect, an embodiment of the present invention further provides a control method for the indoor ventilation system, where the method includes:
acquiring an air pressure value in the spraying chamber detected by the air pressure sensor;
and controlling the air inlet mechanism and/or the air exhaust mechanism to act according to a preset negative pressure range and the air pressure value, so that the air pressure in the spraying chamber is in the preset negative pressure range.
Optionally, the air intake mechanism includes an air intake assembly, and the air exhaust mechanism includes an air exhaust assembly;
according to preset negative pressure scope with the atmospheric pressure value, control air inlet mechanism and/or the action of exhaust mechanism includes:
if the air pressure value is lower than a preset first negative air pressure value, controlling the air inlet assembly to accelerate and/or controlling the air exhaust assembly to decelerate so that the air inlet volume conveyed by the air inlet assembly is larger than the air exhaust volume exhausted by the air exhaust assembly;
if the air pressure value is higher than a preset second negative air pressure value, controlling the air inlet assembly to decelerate and/or controlling the air exhaust assembly to accelerate, so that the air inlet volume conveyed by the air inlet assembly is smaller than the air exhaust volume exhausted by the air exhaust assembly;
wherein the preset first negative air pressure value is lower than the preset second negative air pressure value.
Optionally, the air intake mechanism further comprises an electric valve;
according to preset negative pressure scope with the atmospheric pressure value, control air inlet mechanism and/or the action of exhaust mechanism includes:
if the air pressure value is lower than a preset first negative air pressure value, outputting an opening increasing signal to the electric valve so that the electric valve increases the opening of the valve;
and if the air pressure value is higher than a preset second negative air pressure value, outputting an opening reduction signal to the electric valve so that the electric valve reduces the opening of the valve.
The indoor ventilation system and the control method thereof provided by the embodiment of the invention can monitor the air pressure value in the spraying chamber, and control the air inlet mechanism and/or the air exhaust mechanism to act through the controller, so that the air pressure in the spraying chamber is within a preset negative pressure range, and the problem that the working efficiency of the spraying chamber is influenced because the negative pressure of the spraying chamber is too high or too low in the ventilation process of the spraying chamber is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a line diagram of an indoor ventilation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an indoor ventilation system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method of an indoor ventilation system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, fig. 1 is a pipeline diagram of an indoor ventilation system according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of an indoor ventilation system according to an embodiment of the present invention. The indoor ventilation system provided by the embodiment of the invention can be applied to a spraying room and any equipment similar to the spraying room which needs to work in a specific air pressure range, and the spraying room is only taken as an example for illustration.
As shown in fig. 1 or fig. 2, an indoor ventilation system 100 for a painting booth 200 according to an embodiment of the present invention includes:
the air inlet mechanism 110 is connected with the spraying chamber 200, and the air inlet mechanism 110 is used for conveying air outside the spraying chamber 200 into the spraying chamber 200;
an air exhaust mechanism 120 connected with the spray booth 200, the air exhaust mechanism 120 being used for exhausting air in the spray booth 200 to the outside of the spray booth 200;
an air pressure sensor 130 disposed in the spray booth 200 for detecting an air pressure value in the spray booth 200;
the controller 140 is configured to control the air intake mechanism 110 and/or the air exhaust mechanism 120 to operate according to the air pressure value detected by the air pressure sensor 130, so that the air pressure in the painting booth 200 is within a preset negative pressure range.
In the specific implementation, in the process of spraying the target material in the spraying chamber 200, in order to ensure that the powder in the chamber does not fly, the air pressure in the spraying chamber 200 needs to be maintained within a preset negative pressure range. The room air pressure value of the spray booth 200 can be monitored in real time by providing the air pressure sensor 130 in the spray booth 200. The air pressure sensor 130 sends the detected indoor air pressure value to the controller 140, and the controller 140 sends a control signal to the air intake mechanism 110 and/or the air exhaust mechanism 120 according to the received indoor air pressure value and the preset negative pressure value range, so that the air intake assembly 110 and/or the air exhaust mechanism 120 act under the control of the controller 140.
The air intake mechanism 110 of the present invention can communicate the space outside the spray booth 200 with the space inside the spray booth 200, and the air intake mechanism 110 is used to deliver air outside the spray booth 200 into the spray booth 200 under the control of the controller 140. The air discharge mechanism 120 of the present invention can also communicate the space outside the painting booth 200 with the space inside the painting booth 200, and the air discharge mechanism 120 is used to discharge the air inside the painting booth 200 to the outside of the painting booth 200 under the control of the controller 140.
The controller 140 pre-stores two end points of a preset negative pressure range, which are a preset first negative pressure value and a preset second negative pressure value, respectively, wherein the preset first negative pressure value is lower than the preset second negative pressure value. If the air pressure value measured by the air pressure sensor 130 is higher than the second preset negative air pressure value, the negative air pressure of the spraying chamber 200 needs to be enhanced, and the controller 140 controls the air intake volume conveyed by the air intake mechanism 110 to be smaller than the air exhaust volume exhausted by the air exhaust mechanism 120, so that the negative air pressure of the spraying chamber 200 is between the first preset negative air pressure value and the second preset negative air pressure value; if the air pressure value measured by the air pressure sensor 130 is lower than the first preset negative air pressure value, the negative air pressure of the painting chamber 200 needs to be reduced, and the controller 140 controls the air intake volume delivered by the air intake mechanism 110 to be greater than the air exhaust volume exhausted by the air exhaust mechanism 120, so that the negative air pressure of the painting chamber 200 is between the first preset negative air pressure value and the second preset negative air pressure value.
Specifically, there are various ways for the controller 140 to control the intake air volume delivered by the intake mechanism 110 to be smaller than the exhaust air volume exhausted by the exhaust mechanism 120, and only the operating parameters of the intake mechanism 110 may be adjusted to reduce the intake air volume delivered by the intake mechanism 110; or only adjusting the operation parameters of the exhaust mechanism 120 to increase the exhaust air volume exhausted by the exhaust mechanism 120; or the operation parameters of the air intake mechanism 110 and the air exhaust mechanism 120 are respectively adjusted to realize that the intake air volume conveyed by the air intake mechanism 110 is less than the exhaust air volume exhausted by the air exhaust mechanism 120. In practical application, the adaptability can be adjusted according to production requirements.
Accordingly, there are various ways for the controller 140 to control the amount of intake air supplied by the intake mechanism 110 to be greater than the amount of exhaust air discharged by the exhaust mechanism 120. For example, only the operating parameters of the air intake mechanism 110 may be adjusted to increase the amount of exhaust air delivered by the air intake mechanism 110; or only adjusting the operation parameters of the exhaust mechanism 120 to reduce the exhaust air volume exhausted by the exhaust mechanism 120; or the operation parameters of the air intake mechanism 110 and the air exhaust mechanism 120 are respectively adjusted to realize that the intake air volume conveyed by the air intake mechanism 110 is greater than the exhaust air volume exhausted by the air exhaust mechanism 120.
The indoor ventilation system provided by the embodiment of the invention can monitor the air pressure value in the spraying chamber 200, and controls the air inlet mechanism 110 and/or the air exhaust mechanism 120 to act through the controller 140, so that the air pressure in the spraying chamber 200 is within a preset negative pressure range, and the problem that the negative pressure of the spraying chamber 200 is too high or too low in the ventilation process of the spraying chamber 200, so that the working efficiency of the spraying chamber is influenced, is solved.
In some alternative embodiments, as shown in fig. 1 or fig. 2, the air intake mechanism 110 includes: the air inlet assembly 112 is communicated with the air inlet pipeline 111 and used for conveying air outside the spraying chamber 200 into the spraying chamber 200 under the control of the controller 140, and the air inlet pipeline 111 is used for conveying the air conveyed by the air inlet assembly 112; the air exhaust mechanism 120 includes: an exhaust duct 121 and an exhaust assembly 122, the exhaust assembly 122 is connected to the exhaust duct 121 and used for exhausting the air in the spray booth 200 to the outside of the spray booth 200 under the control of the controller 140, and the exhaust duct 121 is used for conveying the air exhausted by the exhaust assembly 122.
Wherein, the air inlet pipe 111 communicates the space outside the spray booth 200 and the space inside the spray booth 200, and the air inlet component 112 is connected with the air inlet pipe 111. The air intake assembly 112 delivers air from the interior of the spray booth 200 to the interior of the spray booth 200 through the air intake duct 111 under the control of the controller 140, thereby achieving ventilation. Wherein, the air inlet pipe 111, the air inlet assembly 112 and the spray booth 200 may be connected to each other in various ways. For example, the air inlet duct 111 is directly connected to the spray booth 200, and the air inlet assembly 112 is disposed in the air inlet duct 111; or, the air inlet pipe 111 includes two sections of pipes, the first section of pipe communicates the space outside the spraying chamber 200 with the air inlet of the air inlet component 112, and the second section of pipe communicates the space inside the spraying chamber 200 with the air outlet of the air inlet component 112, that is, the air inlet component 112 is disposed between the two sections of air inlet pipes 111.
The exhaust duct 121 communicates the space outside the spray booth 200 with the space inside the spray booth 200, and the exhaust assembly 122 is connected to the exhaust duct 121. The exhaust assembly 122 can convey air in the spray booth 200 to the outside of the spray booth 200 through the exhaust duct 121 under the control of the controller 140, thereby achieving ventilation. The exhaust duct 121, the exhaust assembly 122 and the spray booth 200 may be connected to each other in various ways. For example, the exhaust duct 121 is directly connected to the spray booth 200, and the exhaust assembly 122 is disposed in the exhaust duct 121; or, the exhaust duct 121 includes two sections of ducts, the first section of duct communicates the space inside the spray booth 200 with the air inlet of the exhaust assembly 122, the second section of duct communicates the space outside the spray booth 200 with the air outlet of the exhaust assembly 122, that is, the exhaust assembly 122 is disposed between the two exhaust ducts 121.
Therefore, the air inlet assembly 112 and/or the air exhaust assembly 122 are controlled by the controller 140, so that air is transported in the air inlet pipeline 111 and the air exhaust pipeline 121, and the aim of ventilating the interior of the spray booth 200 is further achieved, and the controller 140 controls the air inlet assembly 112 and/or the air exhaust assembly 122 according to the preset negative pressure range, so that the air pressure in the spray booth 200 is stabilized in the preset negative pressure range, and the problem that the working efficiency of the spray booth 200 is influenced by overhigh or overlow negative air pressure of the spray booth 200 is avoided.
In some alternative embodiments, as shown in fig. 1 or fig. 2, the air intake mechanism 110 further includes an electric valve 113, and the electric valve 113 is used for adjusting the intake air amount of the intake duct 111 under the control of the controller 140.
In a specific implementation, the electric valve 113 may be disposed in the intake duct 111, or the electric valve 113 may be disposed outside the intake duct 111, and the flow rate of the airflow in the intake duct 111 may be further controlled by controlling the opening degree of the valve in the electric valve 113. For example, the smaller the opening of the valve in the motor-operated valve 113, the smaller the flow rate of the air flow in the intake duct 111, and conversely, the larger the opening of the valve in the motor-operated valve 113, the larger the flow rate of the air flow in the intake duct 111. Therefore, the controller 140 is electrically connected to the electric valve 113, and adjusts the opening of the valve to adjust the intake air amount of the intake duct 111. The air intake through the air intake duct 111 can be adjusted by controlling the electric valve 113, the control method is simple, and the reliability of the air intake adjustment is high.
In some alternative embodiments, as shown in fig. 1 or fig. 2, air intake assembly 112 includes a first fan 1121, and first fan 1121 is used for delivering air outside spray booth 200 into spray booth 200; or, the air intake assembly 112 further includes a filter group 1122 disposed at the air inlet or the air outlet of the first fan 1121; the filter group 1122 is used for purifying and filtering the air delivered by the first fan 1121.
Specifically, the filter group 1122 is used to filter out impurities in the air outside the spray booth 200, and prevent the impurities from entering the spray booth 200 and affecting the quality of the air inside the spray booth. As shown in fig. 1, the filter group 1122 is disposed at a front side of the air intake direction of the first fan 1121, so that impurities can be prevented from entering the first fan 1121 to affect normal operation of the first fan 1121. The filter group 1122 may include only one filter or a plurality of filters, and is not particularly limited herein. For example, where filter bank 1122 includes two filters, a primary filter for filtering airborne particles having a diameter greater than 5 μm and a secondary filter for filtering airborne particles having a diameter in the range of 1-5 μm may be included. The primary filter and the intermediate filter can be plate type, folding type or bag type filters, the outer frame of the filter is made of paper frame, aluminum frame or galvanized iron frame for fixing, and the filtering material in the frame comprises at least one of non-woven fabric, nylon net, active carbon filtering material and metal mesh. Through setting up the primary filter in the preceding side of medium efficiency filter air inlet direction, filter the primary filter as the front end of medium efficiency filter to reduce medium efficiency filter's load, prolong medium efficiency filter's life.
It should be noted that in practical applications, the filter group 1122 should be cleaned frequently, otherwise, the blockage may reduce the air intake, which affects the air intake of the painting booth 200, and thus the maintenance of the negative pressure environment in the painting booth 200.
Through the cooperation of first fan 1121 and filter group 1122, the influence of outdoor impurities on the normal operation of first fan 1121 due to the fact that outdoor impurities enter first fan 1121 can be avoided, the influence of outdoor impurities on the spraying operation due to the fact that outdoor impurities enter spraying chamber 200 can also be avoided, and the reliability of an indoor ventilation system and the cleanliness of air are improved.
Further, referring to fig. 1, the intake assembly 112 further includes a heater 1123 and/or a humidifier 1124; the heater 1123 is configured to heat the air delivered by the first fan 1121, and the humidifier 1124 is configured to humidify the air delivered by the first fan 1121.
The heater 1123 is an electric heater, and when it is necessary to heat the air flow in the intake duct 111, the controller 140 turns on the heater 1123 to raise the temperature of the air flow entering the spray booth 200. The humidifier 1124 may be connected to an external water source, and the controller 140 may activate the humidifier 1124 to increase the humidity of the air stream entering the spray booth 200 when it is desired to humidify the air stream in the intake duct 111.
The heater 1123 and the humidifier 1124 may operate simultaneously with the air flow in the intake duct 111, or may operate only one of them. By adding the heater 1123 and/or humidifier 1124 to the room ventilation system 100, the room ventilation system 100 improves the comfort of the workers in the spray booth 200 for the air injected into the spray booth 200.
In some alternative embodiments, as shown in fig. 1, the air inlet duct 111 includes a plurality of air inlet branches connected to the spray booth 200, and the air outlet duct 121 includes a plurality of air outlet branches connected to the spray booth 200; the air outlets of the air inlet branches and the air inlets of the air exhaust branches are arranged in a staggered mode, so that the air entering and exiting the spraying chamber 200 can be more uniform through the indoor air exchange system, the phenomenon that the air enters or the air is exhausted intensively to blow powder is avoided, and normal work in the spraying chamber 200 is affected. In addition, the air quality in the painting booth 200 can be improved as a whole, and the working environment of workers can be improved.
Alternatively, as shown in fig. 1 or 2, the exhaust assembly 122 includes a second fan 1221, and the second fan 1221 is used for exhausting air in the painting booth 200 to the outside of the painting booth 200.
The first fan 1121 sucks air outside the spray booth 200 from the air inlet of the air inlet duct 111, and the air is transmitted in the air inlet duct 111 and conveyed into the spray booth 200 from the air outlet of the air inlet duct 111; the second fan 1221 sucks air in the painting chamber 200 from the air inlet of the air exhaust duct 121, and the air is transported in the air exhaust duct 121 and exhausted from the air outlet of the air exhaust duct 121 to the outside of the painting chamber 200.
Optionally, the first fan 1121 and/or the second fan 1221 may be a variable frequency fan.
The first fan 1121 and/or the second fan 1221 adopt a variable frequency fan, and the energy consumption of the first fan 1121 and/or the second fan 1221 can be reduced under the condition that normal operation and accurate control of the first fan 1121 and the second fan 1221 are ensured.
Based on the same idea, an embodiment of the present invention further provides a control method for the indoor ventilation system, as shown in fig. 3, the method includes:
step 301: acquiring an air pressure value in a spraying chamber detected by an air pressure sensor;
two preset negative pressure ranges with preset first negative pressure values and second negative pressure values as end points are preset in the controller, wherein the preset first negative pressure values are lower than the preset second negative pressure values. If the air pressure value measured by the air pressure sensor is lower than the first preset negative air pressure value, indicating that the negative air pressure degree of the spraying chamber needs to be reduced; and if the air pressure value measured by the air pressure sensor is higher than the second preset negative air pressure value, the negative air pressure degree of the spraying chamber needs to be enhanced.
Step 302: and controlling the air inlet mechanism and/or the air exhaust mechanism to act according to the preset negative pressure range and the air pressure value, so that the air pressure in the spraying chamber is in the preset negative pressure range.
Specifically, if the negative air pressure value in the spraying chamber is not within the preset negative pressure range, the negative air pressure value in the spraying chamber is changed by increasing or decreasing the air intake amount of the air intake mechanism and/or increasing or decreasing the air exhaust amount of the air exhaust mechanism, so as to achieve the purpose of being within the preset negative pressure range.
The control method of the indoor ventilation system provided by the embodiment of the invention can monitor the air pressure value in the spraying chamber, and controls the air inlet mechanism and/or the air exhaust mechanism to act through the controller, so that the air pressure in the spraying chamber is within a preset negative pressure range, and the problem that the working efficiency of the spraying chamber is influenced because the negative pressure of the spraying chamber is too high or too low in the ventilation process of the spraying chamber is ensured.
Optionally, the air intake mechanism comprises an air intake assembly, and the air exhaust mechanism comprises an air exhaust assembly; step 302, controlling the air intake mechanism and/or the air exhaust mechanism to act according to a preset negative pressure range and an air pressure value, including:
if the air pressure value is lower than a preset first negative air pressure value, controlling the air inlet assembly to accelerate and/or controlling the air exhaust assembly to decelerate so that the air inlet volume conveyed by the air inlet assembly is greater than the air exhaust volume exhausted by the air exhaust assembly;
if the air pressure value is higher than a preset second negative air pressure value, controlling the air inlet assembly to decelerate and/or controlling the air exhaust assembly to accelerate so that the air inlet volume conveyed by the air inlet assembly is smaller than the air exhaust volume exhausted by the air exhaust assembly; wherein the preset first negative air pressure value is lower than the preset second negative air pressure value.
Specifically, there are various ways for the controller to control the air intake delivered by the air intake mechanism to be smaller than the air exhaust discharged by the air exhaust mechanism, and the controller can only adjust the operating parameters of the air intake mechanism to reduce the air intake delivered by the air intake mechanism; the operation parameters of the air exhaust mechanism can be adjusted only to improve the air exhaust volume exhausted by the air exhaust mechanism; or the operation parameters of the air inlet mechanism and the air exhaust mechanism are respectively adjusted to realize that the air inlet volume conveyed by the air inlet mechanism is less than the air exhaust volume exhausted by the air exhaust mechanism. In practical application, the adaptability can be adjusted according to production requirements.
Accordingly, there are various ways for the controller to control the air intake volume delivered by the air intake mechanism to be greater than the air exhaust volume exhausted by the air exhaust mechanism. For example, the operation parameters of the air inlet mechanism can be adjusted only to improve the air exhaust volume conveyed by the air inlet mechanism; the operation parameters of the air exhaust mechanism can be adjusted only to reduce the air exhaust volume exhausted by the air exhaust mechanism; or the operation parameters of the air inlet mechanism and the air exhaust mechanism are respectively adjusted to realize that the air inlet volume conveyed by the air inlet mechanism is greater than the air exhaust volume exhausted by the air exhaust mechanism.
Therefore, in the control method of the indoor ventilation system based on the condition that the air inlet mechanism comprises the air inlet assembly and the air exhaust mechanism comprises the air exhaust assembly, the negative air pressure range in the spraying chamber can be adjusted by correspondingly controlling the air inlet assembly and/or the air exhaust assembly. For example, when the difference value between the current negative air pressure value in the spraying chamber and the preset negative air pressure value range is large, the air inlet assembly and the air exhaust assembly can be simultaneously controlled, so that the negative air pressure value in the spraying chamber can be quickly adjusted; when the difference value between the current negative air pressure value and the preset negative air pressure value range in the spraying chamber is small, only the air inlet assembly or the air exhaust assembly can be controlled, so that the energy consumption is further saved.
Optionally, the air intake assembly includes a first fan, and the air exhaust assembly includes a second fan; the control air inlet subassembly slows down, and/or the control subassembly of airing exhaust accelerates, includes: outputting an acceleration signal to the first fan to enable the first fan to increase the rotating speed of the fan blades; and/or outputting a deceleration signal to the second fan so that the second fan reduces the rotating speed of the fan blades;
the control air inlet subassembly slows down, and/or the control subassembly of airing exhaust accelerates, includes: outputting a deceleration signal to the first fan to enable the first fan to reduce the rotating speed of the fan blades; and/or outputting an acceleration signal to the second fan so that the second fan can increase the rotating speed of the fan blades.
Specifically, the controller controls the air inlet assembly to accelerate in a manner that an acceleration signal is output to the first fan so as to increase the rotating speed of fan blades in the first fan; the controller controls the air inlet assembly to decelerate in a mode of outputting a deceleration signal to the first fan so as to reduce the rotating speed of fan blades in the first fan. The controller controls the air exhaust assembly to accelerate in a mode of outputting an acceleration signal to the second fan so as to increase the rotating speed of fan blades in the second fan; the controller controls the air exhaust assembly to decelerate in a mode of outputting a deceleration signal to the second fan so as to reduce the rotating speed of fan blades in the second fan.
When the first fan and the second fan are in the same rotating speed, the side with a larger ventilation aperture generates larger air intake or exhaust volume, and when the first fan and the second fan are in the same ventilation aperture, the side with a higher rotating speed generates larger air intake or exhaust volume. Although the air volume depends on two factors of the rotating speed and the ventilation aperture, because the ventilation aperture is unchanged, the rotating speed of the first fan and the second fan can be adjusted to enable the air volume delivered by the first fan to be larger than the air volume exhausted by the second fan or enable the air volume delivered by the first fan to be smaller than the air volume exhausted by the second fan. For example: under the condition that the ventilation aperture of the second fan is larger than that of the first fan, the rotating speed of the first fan is reduced when the air intake is required to be reduced, and at this time, the condition that the rotating speed of the first fan is larger than that of the second fan but the air delivery volume conveyed by the first fan is smaller than the air exhaust volume exhausted by the second fan may exist.
The air inlet quantity conveyed by the air inlet component is controlled by controlling the rotating speed of the first fan, the air exhaust quantity exhausted by the air exhaust component is controlled by controlling the rotating speed of the second fan, and the air inlet and outlet control system has the characteristics of simplicity in control and high reliability.
Optionally, when the air intake mechanism further comprises an electric valve on the basis of the first fan; according to the preset negative pressure range and the air pressure value, the step of controlling the action of the air inlet mechanism and/or the air exhaust mechanism comprises the following steps:
if the air pressure value is lower than a preset first negative air pressure value, outputting an opening increasing signal to the electric valve so that the electric valve increases the opening of the valve;
and if the air pressure value is higher than the preset second negative air pressure value, outputting an opening reduction signal to the electric valve so that the electric valve reduces the opening of the valve.
Specifically, when the electric valve is closed or the opening degree is smaller, and the negative air pressure value in the spraying chamber is smaller than the first preset negative air pressure value, the opening degree of the electric valve is increased, and the air volume conveyed by the first fan can be further increased, so that the air inlet volume conveyed by the first fan is increased by adjusting the opening degree of the electric valve, and the negative air pressure value in the spraying chamber is within the preset negative pressure range. On the contrary, if the opening of the electric valve is fully opened or large, and the negative air pressure value in the spraying chamber is larger than the second preset negative pressure value, the electric valve is closed or the opening of the electric valve is reduced, so that the air quantity conveyed by the first fan can be reduced, the air inlet quantity conveyed by the first fan is reduced by adjusting the opening of the electric valve, and the negative air pressure value in the spraying chamber is within the preset negative pressure range.
Under the condition that the air inlet mechanism comprises the electric valve and the first fan and the air exhaust mechanism comprises the second fan, the air inlet volume conveyed by the first fan is larger than the air exhaust volume discharged by the second fan or the air inlet volume conveyed by the first fan is smaller than the air exhaust volume discharged by the second fan by adjusting the opening degree of a valve in the electric valve, and the control is simple and quick.
It should be noted that the spray booth is not within the preset negative pressure range in the initial stage, so before step 301, the method may further include: and the air inlet mechanism and the air exhaust mechanism are controlled to be opened, in order to ensure that the air pressure in the spraying chamber is negative air pressure, the controller controls the air quantity conveyed by the air inlet mechanism to be smaller than the air quantity exhausted by the air exhaust mechanism, and the air inlet mechanism and/or the air exhaust mechanism are/is adjusted in real time according to the air pressure value in the current environment in the spraying chamber. Specifically, when air inlet mechanism includes motorised valve and first fan, when exhaust mechanism includes the second fan, control air inlet mechanism and exhaust mechanism include when opening: and opening the electric valve to open the valve of the electric valve, starting the first fan and the second fan to enable the air intake volume conveyed by the first fan to be smaller than the air exhaust volume exhausted by the second fan, and accordingly achieving the negative air pressure in the spraying chamber within the preset range. Therefore, the indoor ventilation system provided by the invention can adjust the air inlet component and/or the air exhaust component according to the comparison of the current air pressure value and the preset negative pressure range in real time, so that equipment such as a spraying room can be always in the preset negative pressure range, the working environment of the spraying room is ensured, and the problem that the working efficiency is influenced by the air pressure change is avoided.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An indoor air exchange system is applied to the spray booth, its characterized in that includes:
the air inlet mechanism is connected with the spraying chamber and used for conveying air outside the spraying chamber into the spraying chamber;
the air exhaust mechanism is connected with the spraying chamber and used for exhausting air in the spraying chamber to the outside of the spraying chamber;
the air pressure sensor is arranged in the spraying chamber and used for detecting the air pressure value in the spraying chamber;
and the controller is used for controlling the air inlet mechanism and/or the air exhaust mechanism to act according to the air pressure value detected by the air pressure sensor so as to enable the air pressure in the spraying chamber to be within a preset negative pressure range.
2. Indoor ventilation system according to claim 1,
the air inlet mechanism includes: the air inlet assembly is communicated with the air inlet pipeline and used for conveying air outside the spraying chamber to the spraying chamber under the control of the controller, and the air inlet pipeline is used for conveying the air conveyed by the air inlet assembly;
the exhaust mechanism includes: the air exhaust assembly is connected with the air exhaust pipeline and used for exhausting air in the spraying chamber to the outside of the spraying chamber under the control of the controller, and the air exhaust pipeline is used for transmitting the air exhausted by the air exhaust assembly.
3. The indoor ventilation system of claim 2, wherein the air intake mechanism further comprises an electric valve for adjusting an intake air amount of the intake duct under the control of the controller.
4. The indoor ventilation system of claim 2, wherein the air intake assembly comprises a first fan for delivering air outside the spray booth into the spray booth and a filter bank for purifying and filtering the air delivered by the first fan.
5. An indoor ventilation system as defined in claim 4, wherein the air intake assembly further comprises a heater and/or a humidifier; the heater is used for heating the air conveyed by the first fan, and the humidifier is used for humidifying the air conveyed by the first fan.
6. The indoor ventilation system of claim 2, wherein the air inlet duct comprises a plurality of air inlet branches connected to the spray booth, and the air outlet duct comprises a plurality of air outlet branches connected to the spray booth;
the air outlets of the air inlet branches and the air inlets of the air exhaust branches are arranged in a staggered mode.
7. An indoor ventilation system according to claim 2, wherein the exhaust assembly includes a second fan for exhausting air within the spray booth to the exterior of the spray booth.
8. A method of controlling an indoor ventilation system as claimed in claim 1, the method comprising:
acquiring an air pressure value in the spraying chamber detected by the air pressure sensor;
and controlling the air inlet mechanism and/or the air exhaust mechanism to act according to a preset negative pressure range and the air pressure value, so that the air pressure in the spraying chamber is in the preset negative pressure range.
9. The method of claim 8, wherein the air intake mechanism comprises an air intake assembly and the air exhaust mechanism comprises an air exhaust assembly;
according to preset negative pressure scope with the atmospheric pressure value, control air inlet mechanism and/or the action of exhaust mechanism includes:
if the air pressure value is lower than a preset first negative air pressure value, controlling the air inlet assembly to accelerate and/or controlling the air exhaust assembly to decelerate so that the air inlet volume conveyed by the air inlet assembly is larger than the air exhaust volume exhausted by the air exhaust assembly;
if the air pressure value is higher than a preset second negative air pressure value, controlling the air inlet assembly to decelerate and/or controlling the air exhaust assembly to accelerate, so that the air inlet volume conveyed by the air inlet assembly is smaller than the air exhaust volume exhausted by the air exhaust assembly;
wherein the preset first negative air pressure value is lower than the preset second negative air pressure value.
10. The method of claim 9, wherein the air intake mechanism further comprises an electrically operated valve;
according to the preset negative pressure scope with the atmospheric pressure value, control air inlet mechanism and/or the action of exhaust mechanism still includes:
if the air pressure value is lower than a preset first negative air pressure value, outputting an opening increasing signal to the electric valve so that the electric valve increases the opening of the valve;
and if the air pressure value is higher than a preset second negative air pressure value, outputting an opening reduction signal to the electric valve so that the electric valve reduces the opening of the valve.
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| CN111637617A (en) * | 2020-06-24 | 2020-09-08 | 深圳市巨鼎医疗设备有限公司 | Control method, system, equipment and storage medium for negative pressure isolation ward |
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| CN113000077A (en) * | 2021-01-26 | 2021-06-22 | 珠海格力电器股份有限公司 | Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory |
| CN115235018A (en) * | 2022-07-18 | 2022-10-25 | 上海槿木建筑设计工程有限公司 | Fresh air system for ultralow-energy-consumption building |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111609500A (en) * | 2020-05-22 | 2020-09-01 | 湖南美业环境科技有限公司 | Indoor negative pressure control method, terminal, negative pressure isolation diagnosis room and storage medium |
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| CN111765579A (en) * | 2020-06-24 | 2020-10-13 | 深圳市巨鼎医疗设备有限公司 | Negative pressure control method and device for isolation ward, storage medium and isolation ward |
| CN111765579B (en) * | 2020-06-24 | 2021-07-13 | 深圳市巨鼎医疗股份有限公司 | Negative pressure control method and device for isolation ward, storage medium and isolation ward |
| CN113000077A (en) * | 2021-01-26 | 2021-06-22 | 珠海格力电器股份有限公司 | Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory |
| CN115235018A (en) * | 2022-07-18 | 2022-10-25 | 上海槿木建筑设计工程有限公司 | Fresh air system for ultralow-energy-consumption building |
| CN115235018B (en) * | 2022-07-18 | 2023-08-15 | 上海槿木建筑设计工程有限公司 | Fresh air system for ultralow energy consumption building |
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Effective date of registration: 20211104 Address after: No.31 Yanqi street, Yanqi Economic Development Zone, Huairou District, Beijing Applicant after: Dongjun new energy Co.,Ltd. Address before: No.38, Paradise Street, Yanqi Economic Development Zone, Huairou District, Beijing Applicant before: Lingfan new energy technology (Beijing) Co.,Ltd. |
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