A method for preventing negative pressure in a house

Abstract

The application discloses a residential negative pressure prevention control method, and is based on a specially designed oil fume purification device. The oil fume purification device comprises two airflow detection modules and is arranged at different positions compared with an air inlet. For the oil fume purification device, airflow speed data collected by a fan at different rotating speeds and airflow change data collected when the rotating speed of the fan changes are used to judge whether an environment where the oil fume purification device is located is a closed environment. On one hand, the judgment result accuracy can be improved, and on the other hand, even if the structure of the environment where the oil fume purification device is located is complex, the judgment result will not be affected too much.

Description

TECHNICAL FIELD

[0001] The present application relates to the air purification technical field, and particularly relates to a residential anti-negative pressure control method. BACKGROUND

[0002] Due to the high sealing property of a residence or a building, the characteristic is that the whole building has high sealing property. When an oil smoke exhaust fan in a kitchen is used, negative pressure is caused in a room, which directly leads to the following results: dirty air outside is sucked into the room through a door gap and a window gap, so that haze particles or pollutants outside enter the room; a large amount of air with constant temperature in the room is sucked and discharged, so that energy is lost and wasted; and foul gas in a floor drain, a toilet and the like is sucked into the room, so that the room has foul gas and the air environment in the room is polluted.

[0003] It can be seen that how to timely determine the time of negative pressure generation becomes a problem to be solved. SUMMARY

[0004] The present application provides a residential anti-negative pressure control method to at least partially solve the above technical problems.

[0005] The present application adopts the following technical scheme:

[0006] In a first aspect, the present application provides a residential anti-negative pressure control method, which is based on an oil smoke purification device. The oil smoke purification device comprises a fan, an air duct, an air inlet arranged at one end of the air duct, a first air flow detection module and a second air flow detection module arranged at left and right sides of the air inlet in a horizontal direction respectively. The method comprises the following steps:

[0007] In response to an opening instruction, the fan is started, so that the fan reaches a preset first rotating speed;

[0008] When the fan reaches the first rotating speed, the first air flow detection module and the second air flow detection module are started, so that a sequence of air flow speeds detected by the first air flow detection module at each time node in a first specified time period thereafter is obtained as first data, and a sequence of air flow speeds detected by the second air flow detection module at each time node in the first specified time period is obtained as second data;

[0009] The fan is controlled to reach a preset second rotating speed, and the second rotating speed is less than the first rotating speed;

[0010] The air flow speed change amount detected by the specified air flow detection module at the moment when the fan is reduced in speed is taken as third data; a sequence of air flow speeds detected by the first air flow detection module at each time node in a second specified time period thereafter is taken as fourth data; a sequence of air flow speeds detected by the second air flow detection module at each time node in the second specified time period is taken as fifth data; the specified air flow detection module is the one with a larger average air flow speed detected by the first air flow detection module and the second air flow detection module in the first specified time period;

[0011] If the difference between the maximum air flow speed and the minimum air flow speed in the sequence of the first specified data is less than a preset difference threshold, it is determined whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data and the fifth data, wherein the first specified data is the one with smaller data fluctuation between the first data and the second data.

[0012] In an optional embodiment of the present specification, the method further comprises:

[0013] If the difference between the maximum air flow speed and the minimum air flow speed in the sequence of the first specified data is not less than a preset difference threshold, it is determined that there is the negative pressure risk.

[0014] In an optional embodiment of the present specification, it is determined whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data and the fifth data, comprising:

[0015] If the air flow speed change amount represented by the third data is greater than a preset change amount threshold, a change amount curve of the sequence of the first data is taken as a first curve, and a change amount curve of the sequence of the second data is taken as a second curve.

[0016] If the similarity of the first curve and the second curve is not greater than a preset similarity threshold, it is determined that there is a negative pressure risk; if the similarity of the first curve and the second curve is greater than a preset similarity threshold, it is determined that there is no negative pressure risk.

[0017] In an optional embodiment of the present specification, it is determined whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data and the fifth data, comprising:

[0018] If the third data represents the airflow speed variation is not greater than the preset variation threshold, a variation curve of a sequence of second specified data is determined as a third curve, the second specified data is the greater fluctuation of the third data and the fourth data;

[0019] If the slope of any point of the third curve is not greater than the maximum slope of the fourth curve, it is determined that there is no negative pressure risk, the fourth curve is a variation curve of a sequence of the first specified data.

[0020] In an optional embodiment of the present specification, the second specified time period is positively correlated with the fluctuation degree of the first specified data.

[0021] In an optional embodiment of the present specification, the airflow detection module comprises a plurality of detection units arranged along the surface of the oil fume purification device, and the connecting line between two adjacent detection units forms a broken line, and the airflow detection module comprises the first airflow detection module and the second airflow detection module.

[0022] In an optional embodiment of the present specification, the detection unit is a hot ball type anemometer.

[0023] In a second aspect, the embodiments of the present application also provide a residential negative pressure prevention control device, which is applied to an oil fume purification device, and the oil fume purification device comprises a fan, an air duct, an air inlet arranged at one end of the air duct, a first airflow detection module and a second airflow detection module arranged respectively at the left and right sides of the air inlet in the horizontal direction, and the device comprises:

[0024] The pneumatic module is configured to: in response to an opening instruction, start the fan so that the fan reaches a preset first rotating speed;

[0025] The data acquisition first module is configured to: when the fan reaches the first rotating speed, open the first airflow detection module and the second airflow detection module, obtain a sequence of airflow speeds detected by the first airflow detection module at each time node in a first specified time period thereafter as first data, and obtain a sequence of airflow speeds detected by the second airflow detection module at each time node in the first specified time period as second data;

[0026] The rotating speed adjustment module is configured to: control the fan to reach a preset second rotating speed, and the second rotating speed is less than the first rotating speed.

[0027] The data acquisition second module is configured to: designate the airflow speed change amount detected by the specified airflow detection module at the moment of the fan speed reduction as third data; obtain a sequence of airflow speeds detected by the first airflow detection module at each time node in a second specified time period thereafter as fourth data; obtain a sequence of airflow speeds detected by the second airflow detection module at each time node in the second specified time period as fifth data; and the specified airflow detection module is the larger one of the average airflow speeds detected by the first airflow detection module and the second airflow detection module in the first specified time period;

[0028] The judging module is configured to: if a difference between the maximum airflow speed and the minimum airflow speed in the sequence of the first specified data is less than a preset difference threshold, judge whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data, and the fifth data, wherein the first specified data is the smaller one of the first data and the second data in terms of data fluctuation.

[0029] In a third aspect, an embodiment of the present application further provides an electronic device, comprising:

[0030] a processor; and

[0031] a memory arranged to store computer executable instructions that, when executed, cause the processor to perform the method of any of the first aspect.

[0032] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium storing one or more programs, which, when executed by an electronic device comprising a plurality of applications, cause the electronic device to perform the method of any of the first aspect.

[0033] The above at least one technical solution adopted by the embodiments of the present application can achieve the following beneficial effects:

[0034] The environment of the range hood is complex, and the ventilation structure of the house, such as doors and windows, can be arranged at various positions relative to the range hood, which makes the environment of the range hood different for different houses. This brings great difficulty for the range hood to determine whether the environment is airtight by itself. If the range hood is not in an airtight environment, there will be a risk of negative pressure. The method provided in the specification is based on a specially designed oil fume purification device, which includes two airflow detection modules arranged at different positions relative to the air inlet. For such an oil fume purification device, by collecting the airflow speed data of the fan at different speeds and the airflow change data when the fan speed changes, it is determined whether the environment of the oil fume purification device is an airtight environment (i.e., whether there is a risk of negative pressure), which can improve the accuracy of the determination result, and even if the environment structure of the oil fume purification device is complex, it will not have too much impact on the determination result. BRIEF DESCRIPTION OF DRAWINGS

[0035] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 A process schematic diagram of a residential anti-negative pressure control method provided in an embodiment of the specification;

[0037] Figure 2 A structural schematic diagram of an oil fume purification device in an embodiment of the specification;

[0038] Figure 3 A structural schematic diagram of an electronic device in an embodiment of the specification. DETAILED DESCRIPTION

[0039] The present application will be further described in detail through specific embodiments in combination with the drawings. In different embodiments, similar elements are associated with similar element reference numbers. In the following embodiments, many details are described in order to make the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art, according to the description in the specification and the general technical knowledge in the art, the related operations can be fully understood.

[0040] In addition, features described in the specification, operations or characteristics can be combined in any appropriate manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially changed or adjusted in a manner apparent to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment, and do not mean that the sequence is necessary, unless otherwise stated that a certain sequence must be followed.

[0041] The serial numbers of the components in this paper, such as "second", "second", etc., are only used to distinguish the described objects, and have no any sequence or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0042] The technical solutions provided by the embodiments of the application are described in detail below with reference to the drawings.

[0043] The method in the specification is designed for an oil fume purification device. The oil fume purification device comprises a fan, an air duct, an air inlet arranged at one end of the air duct, and a first airflow detection module and a second airflow detection module arranged respectively on the left and right sides of the air inlet in the horizontal direction. The airflow detection module (including the first airflow detection module and the second airflow detection module) can be integrally arranged with the oil fume purification device, or can be detachably arranged. The relative positional relationship between the airflow detection module and the air inlet is as shown in Figure 2

[0044] The airflow detection module is used to detect the flow rate of the airflow. In an optional embodiment of the specification, the airflow detection module comprises a plurality of detection units arranged along the surface of the oil fume purification device, and the connecting line between two adjacent detection units forms a broken line. The detection unit can be a hot ball type anemometer. In the case of multiple detection units, the average value of the detection results of two detection units with similar detection results for the flow rate of the airflow can be taken as the detection result of the airflow detection module to which they belong.

[0045] The residential anti-negative pressure control method provided in the specification is as shown in Figure 1 The residential anti-negative pressure control method in the specification comprises the following steps:

[0046] S100: In response to the start instruction, the fan is started so that the fan reaches a preset first rotating speed.

[0047] The technical solutions in the specification aim to determine whether the environment in which the oil fume purification device is located is a closed environment within a certain period of time after the oil fume purification device starts working, and then perform corresponding detection under the triggering of the start instruction.

[0048] ​Exemplarily, if doors and windows of a room where the oil fume purification device is located are all closed, the environment where the oil fume purification device is located is a closed environment; if at least one of the doors and windows is open, the environment is not closed, and appropriate measures should be taken to make the environment closed.

[0049] The first rotating speed in the specification is a preset value, in an optional embodiment, the first rotating speed is an empirical value; in another optional embodiment of the specification, the first rotating speed is a rated maximum rotating speed of the fan.

[0050] The opening instruction can be generated under triggering of a start button of the oil fume purification device, and in some cases, can also be generated under triggering of a smart terminal in communication connection with the oil fume purification device.

[0051] S102: When the fan reaches the first rotating speed, the first airflow detection module and the second airflow detection module are opened, a sequence of airflow speeds detected by the first airflow detection module at each time node in a first specified time period thereafter is obtained as first data, and a sequence of airflow speeds detected by the second airflow detection module at each time node in the first specified time period is obtained as second data.

[0052] The airflow detection module is opened only when the fan reaches the first rotating speed, so that the airflow detection module can be prevented from collecting data before the fan is stable, and thus the unstable data can be prevented from interfering with the judgment result.

[0053] The first data and the second data are both sequences of data changing with time, so that the state of airflow speed changing with time can be reflected. It is assumed that whether the environment is closed or not, the air pressure of the environment where the oil fume purification device is located will gradually tend to be stable after the oil fume purification device works for a period of time, and will not appear a significant and continuous decrease. This step aims to investigate the change of airflow speed in the process of tending to be stable.

[0054] In some environments, doors or windows that cause airflow to flow into the environment can be arranged on the right side of the oil fume purification device, while in other environments, these structures can be arranged on the left side of the oil fume purification device, and in addition, these structures can be arranged in front of the oil fume purification device. This can cause the speed of airflow flowing to the air inlet to be different and the change of the speed of airflow flowing to the air inlet to be different when the environment is not closed. Different arrangement positions of the airflow detection module and different arrangement positions of the detection unit can make the method in the specification applicable to most existing house structures.

[0055] The length of the first specified time period can be a preset value based on experience. The time nodes in the first specified time period can also be preset, and the detection unit collects data at the time nodes.

[0056] S104: controlling the fan to reach a preset second rotating speed, the second rotating speed being less than the first rotating speed.

[0057] This step aims to make the oil fume purification equipment suddenly reduce speed. After experiencing the first specified time period, the environment in which the oil fume purification equipment is located has already formed a stable airflow path, even if it is open. At this time, if the fan suddenly reduces speed, the inertia of the gas due to the previous high-speed flow will continue to flow to the location of the airflow detection module. If the environment in which the oil fume purification equipment is located is closed, the sudden reduction of the fan speed will also cause the airflow flowing to the airflow detection module to reduce in speed.

[0058] S106: specifying the change in airflow speed detected by the airflow detection module at the moment when the fan speed is reduced as third data; obtaining a sequence of airflow speeds detected by the first airflow detection module at each time node within a second specified time period thereafter as fourth data; obtaining a sequence of airflow speeds detected by the second airflow detection module at each time node within the second specified time period as fifth data; the specified airflow detection module being the one with a larger average airflow speed detected by the first airflow detection module and the second airflow detection module within the first specified time period.

[0059] If the environment is open, different detection modules will have different data due to different positions relative to doors and windows. The detection module with a larger average airflow speed detected within the first specified time period is likely to be closer to the doors and windows, and is more sensitive to changes in airflow.

[0060] After the fan speed is suddenly reduced, the airflow speed is still detected at a lower rotating speed.

[0061] S108: if the difference between the maximum airflow speed and the minimum airflow speed in the sequence constituting the first specified data is less than a preset difference threshold, determining whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data, and the fifth data, wherein the first specified data is the one with smaller data fluctuations among the first data and the second data.

[0062] Considering that there is likely to be a user near the oil fume purification equipment when it is working, the user's movement in front of the oil fume purification equipment can also affect the detection results of the airflow detection module. This effect is more obvious when the fan speed is high, so the first specified data is determined from the first data and the second data. The data with smaller fluctuations indicates that the user's movement has less impact on the data collection of the airflow detection module, so the data with smaller fluctuations is taken as the first specified data.

[0063] If the difference between the maximum airflow flow rate and the minimum airflow flow rate in the first specified data is less than the difference threshold value, it indicates that a stable airflow channel has been formed within the first specified time period, and the airflow data collected in this environment can be used for subsequent analysis. In an optional embodiment of the present specification, if the difference is greater, it indicates that a stable airflow channel has not been formed after the first specified time period, and the possibility of an open door or window is greater, so the negative pressure risk can be directly determined.

[0064] Since the oil fume purification equipment is usually used indoors, and the indoor space is limited, the detection accuracy will be affected if the air pressure is directly detected for the indoor environment. Through the method in the present specification, air pressure detection can be avoided, and whether the door and window are closed can be determined through airflow detection.

[0065] In an optional embodiment of the present specification, if it is detected that the door and window are not closed, i.e., there is a negative pressure risk, an alarm is issued. The alarm in the present specification can be in the form of an audible and visual alarm, or an alarm message can be generated and sent to a mobile terminal in communication connection with the oil fume purification equipment.

[0066] The foregoing embodiments can determine the existence of negative pressure. In addition, in other optional embodiments of the present specification, the absence of negative pressure can also be determined. Specifically: if the airflow velocity change amount represented by the third data is greater than a preset change amount threshold value, it indicates that airflow inertia occurs with the adjustment of the fan speed, indicating a high risk, and the change amount curve of the sequence constituting the first data is further determined as a first curve; the change amount curve of the sequence constituting the second data is determined as a second curve. The horizontal coordinate of the change amount curve in the present specification is time, and the vertical coordinate is the change amount. The change amount is calculated by subtracting the airflow flow rate collected at the previous event node from the airflow flow rate collected at the certain event node.

[0067] If the similarity of the first curve and the second curve is not greater than a preset similarity threshold value (empirical value), i.e., the difference between the two is large, the positions of the two airflow detection modules are different from the positions of the door and window, and the door or window is in an open state, it is determined that there is a negative pressure risk. If the similarity of the first curve and the second curve is greater than a preset similarity threshold value (empirical value), it is determined that there is no negative pressure risk. Further, if the fluctuation coefficient of the first data and the second data, which has greater fluctuation, is not greater than a preset coefficient threshold value (empirical value), and the similarity of the first curve and the second curve is greater than a preset similarity threshold value, it indicates that the user is not near the oil fume purification equipment, and at this time, the user is not reminded, so even if there is actually a negative pressure risk, it is directly determined that there is no negative pressure risk, avoiding further consumption of data processing resources.

[0068] It can be seen that the method in the specification also considers the user's condition when determining whether there is a risk of negative pressure. The determination result of the risk of negative pressure is meaningful only when there is a user near the oil fume purification device.

[0069] In a further optional embodiment of the specification, if the change amount of the airflow speed represented by the third data is not greater than a preset change amount threshold, it indicates that the airflow does not exhibit inertia phenomenon after the sudden drop of the fan speed, and the possibility of the risk of negative pressure is smaller, but further determination is still needed. At this time, the data with larger fluctuation in the third data and the fourth data is taken as the second specified data. The change amount curve of the sequence constituting the second specified data is taken as the third curve.

[0070] Then, the change amount curve of the sequence of the first specified data is taken as the fourth curve. If the slope of any point of the third curve is not greater than the maximum slope of the fourth curve, it indicates that no matter the fan speed is, the environment where the airflow detection module is located can be approximated as consistent air pressure everywhere, that is, there is no airflow change caused by power other than the fan, that is, the doors and windows are closed, and it is determined that there is no risk of negative pressure. Otherwise, it is considered that there is a risk of negative pressure.

[0071] It can be seen that, on the one hand, the technical solution in the specification can determine the possibility of the risk of negative pressure; on the other hand, it can also determine the possibility of the absence of the risk of negative pressure. The two methods have their own characteristics. The embodiment of determining the risk of negative pressure is more simple and fast; although the embodiment of determining the absence of the risk of negative pressure is complex, the determination result is more accurate, and the determination of whether there is a risk of negative pressure is determined by the "elimination method". As long as the possibility of the absence of the risk of negative pressure cannot be eliminated, it is determined that there is a risk of negative pressure, which can bottom out the result of the determination.

[0072] As for how to choose between the two methods, in an optional embodiment of the specification, a control panel is arranged on the oil fume purification device, and the user can set it through the control panel. In another optional embodiment of the specification, the following embodiment can be used to make a decision.

[0073] A third airflow detection module is arranged in the air duct of the oil fume purification device, and the oil fume purification device is provided with an airflow speed reference table in advance. The airflow speed reference table records the corresponding relationship between the airflow speed in the air duct collected by the third airflow detection module and the fan speed in an open system. Before starting to control the fan to execute speed reduction, it is determined whether the current speed of the fan and the airflow speed collected by the third airflow detection module are greater than the speed corresponding to the current speed of the fan recorded in the airflow speed reference table. If yes, the mode of determining whether there is no risk of negative pressure is adopted; if no, the mode of determining whether there is a risk of negative pressure is adopted.

[0074] In a further optional embodiment of the present specification, the corresponding relationship recorded in the airflow flow rate table is modified by a weight value. That is, the corresponding relationship recorded in the airflow flow rate table is the product of the fan speed and the weight value and the airflow flow rate. The weight value is a number less than 1 and greater than 0, and the weight value is negatively correlated with the cumulative use time of the oil fume purification device since the first use. In this embodiment, the corresponding relationship between the weight value and the cumulative time is also recorded in the airflow flow rate table, so before the speed is reduced, the weight value can be determined first by looking up the table, and then the corresponding relationship corresponding to the fan speed is determined, and it is judged from the corresponding relationship whether the airflow flow rate meets the condition.

[0075] In a further optional embodiment of the present specification, the second specified time period is positively correlated with the fluctuation degree of the first specified data. The fluctuation degree in this embodiment is positively correlated with the following two aspects: the average value of the difference between the airflow flow rates collected at any two adjacent time nodes, and the maximum value of the difference between the airflow flow rates collected at any two adjacent time nodes. The specific corresponding relationship between the second specified time period and the first specified data can be obtained through experiments by switching whether the environment is an open system, and then maintained through a database.

[0076] Based on the same idea, the present specification also provides a residential negative pressure prevention control device, which is applied to an oil fume purification device, and the oil fume purification device comprises: a fan, an air duct, an air inlet arranged at one end of the air duct, a first airflow detection module and a second airflow detection module arranged respectively on the left and right sides of the air inlet in the horizontal direction. The device comprises:

[0077] The pneumatic module is configured to: in response to an opening instruction, start the fan so that the fan reaches a preset first speed;

[0078] The data acquisition first module is configured to: when the fan reaches the first speed, turn on the first airflow detection module and the second airflow detection module, obtain a sequence of airflow velocities detected by the first airflow detection module at each time node in a first specified time period thereafter as first data, and obtain a sequence of airflow velocities detected by the second airflow detection module at each time node in the first specified time period as second data;

[0079] The speed adjustment module is configured to: control the fan to reach a preset second speed, and the second speed is less than the first speed;

[0080] The data acquisition second module is configured to: take the airflow speed change amount detected by the specified airflow detection module as third data at the moment of the fan speed reduction; obtain a sequence of airflow speeds detected by the first airflow detection module at each time node in a second specified time period thereafter as fourth data; obtain a sequence of airflow speeds detected by the second airflow detection module at each time node in the second specified time period as fifth data; the specified airflow detection module is the larger one of the average airflow speeds detected by the first airflow detection module and the second airflow detection module in the first specified time period;

[0081] The judgment module is configured to: if the difference between the maximum airflow speed and the minimum airflow speed in the sequence of the first specified data is less than a preset difference threshold, determine whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data, and the fifth data, wherein the first specified data is the one with smaller data fluctuation between the first data and the second data.

[0082] In an optional embodiment of the present specification, the judgment module is further configured to: if the difference between the maximum airflow speed and the minimum airflow speed in the sequence of the first specified data is not less than a preset difference threshold, determine that there is the negative pressure risk.

[0083] In an optional embodiment of the present specification, the judgment module is further configured to: if the airflow speed change amount indicated by the third data is greater than a preset change amount threshold, determine a change amount curve of the sequence of the first data as a first curve; determine a change amount curve of the sequence of the second data as a second curve; if the similarity of the first curve and the second curve is not greater than a preset similarity threshold, determine that there is a negative pressure risk; if the similarity of the first curve and the second curve is greater than a preset similarity threshold, determine that there is no negative pressure risk.

[0084] In an optional embodiment of the present specification, the judgment module is further configured to: if the airflow speed change amount indicated by the third data is not greater than a preset change amount threshold, determine a change amount curve of the sequence of the second specified data as a third curve, the second specified data being the one with greater data fluctuation between the third data and the fourth data; if the slope of any point of the third curve is not greater than the maximum slope of a fourth curve, determine that there is no negative pressure risk, the fourth curve being the change amount curve of the sequence of the first specified data.

[0085] In an optional embodiment of the present specification, the second specified time period is positively correlated with the fluctuation degree of the first specified data.

[0086] In an optional embodiment of the present application, the air flow detection module comprises a plurality of detection units arranged along the surface of the oil fume purification device, and the connecting line between two adjacent detection units forms a broken line. The air flow detection module comprises the first air flow detection module and the second air flow detection module.

[0087] In an optional embodiment of the present application, the detection unit is a hot ball type anemometer.

[0088] It can be understood that the above-mentioned residential anti-negative pressure control device can realize each step of the residential anti-negative pressure control method provided in the foregoing embodiments, and the residential anti-negative pressure control device will not be described here again.

[0089] Figure 3 is a structural schematic diagram of an electronic device according to an embodiment of the present application. Please refer to Figure 3 At the hardware level, the electronic device includes a processor, and optionally further includes an internal bus, a network interface, and a memory. The memory can include a memory such as a random-access memory (RAM), and can also include a non-volatile memory such as at least one disk memory. Of course, the electronic device can also include other hardware required by the business.

[0090] The processor, the network interface, and the memory can be connected to each other through the internal bus, which can be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, and a control bus. For ease of representation, Figure 3 Only one bidirectional arrow is used in the figure, but it does not mean that there is only one bus or only one type of bus.

[0091] The memory is used to store programs. Specifically, the program can include program code, and the program code includes computer operation instructions. The memory can include a memory and a non-volatile memory, and provides instructions and data to the processor.

[0092] The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs, and forms a residential anti-negative pressure control device at the logical level. The processor executes the program stored in the memory, and is specifically configured to execute any one of the foregoing residential anti-negative pressure control methods.

[0093] The above is as stated in this application. Figure 1 The residential negative pressure control method disclosed in the illustrated embodiment can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of this application can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0094] The electronic device can also perform Figure 1 A method for controlling negative pressure in residential buildings was developed and implemented. Figure 1 The functions of the embodiments shown are not described in detail here.

[0095] This application also proposes a computer-readable storage medium that stores one or more programs, the programs including instructions that, when executed by an electronic device including multiple applications, enable the electronic device to perform... Figure 1 The embodiment shown describes a method for executing a residential negative pressure control device, specifically used to execute any of the aforementioned residential negative pressure control methods.

[0096] Those skilled in the art will appreciate that embodiments of the application can be readily used as software, hardware, or a combination of software and hardware. In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0097] The present application is described in reference to the flowchart illustrations and / or block diagrams according to embodiments of the application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing system, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0098] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0099] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. ​ one or more functions specified in the flowchart illustrations and / or block diagrams.

[0100] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0101] The memory can include non-persistent memory, random access memory (RAM), and / or non-volatile memory, such as read only memory (ROM) or flash memory, among others. The memory is an example of computer-readable media.

[0102] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0103] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusions, such that a process, method, article or apparatus that comprises a list of elements does not only include those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0104] Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] The above only describes the embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A method of residential anti-negative pressure control, characterized by, The method is based on an oil fume purification device, the oil fume purification device comprises: a fan, an air duct, an air inlet arranged at one end of the air duct, a first air flow detection module and a second air flow detection module arranged respectively at the left and right sides of the air inlet in the horizontal direction, and the method comprises: In response to an opening instruction, the fan is started so that the fan reaches a preset first rotating speed; When the fan reaches the first rotating speed, the first air flow detection module and the second air flow detection module are turned on, a sequence of air flow speeds detected by the first air flow detection module at each time node in a first specified time period thereafter is obtained as first data, a sequence of air flow speeds detected by the second air flow detection module at each time node in the first specified time period is obtained as second data; The fan is controlled to reach a preset second rotating speed, and the second rotating speed is less than the first rotating speed; At the moment when the fan is reduced in speed, the air flow speed change amount detected by the specified air flow detection module is taken as third data, a sequence of air flow speeds detected by the first air flow detection module at each time node in a second specified time period thereafter is obtained as fourth data, a sequence of air flow speeds detected by the second air flow detection module at each time node in the second specified time period is obtained as fifth data, and the specified air flow detection module is the one with a larger average air flow speed detected by the first air flow detection module and the second air flow detection module in the first specified time period; If the difference between the maximum air flow speed and the minimum air flow speed in the sequence constituting the first specified data is less than a preset difference threshold, it is determined whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data and the fifth data, wherein the first specified data is the one with smaller data fluctuation among the first data and the second data.

2. The method of claim 1, wherein, The method further comprises: If the difference between the maximum air flow speed and the minimum air flow speed in the sequence constituting the first specified data is not less than a preset difference threshold, it is determined that there is a negative pressure risk.

3. The method of claim 1, wherein, Determining whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data and the fifth data comprises: If the air flow speed change amount represented by the third data is greater than a preset change amount threshold, a change amount curve constituting the sequence of the first data is determined as a first curve, and a change amount curve constituting the sequence of the second data is determined as a second curve; If the similarity of the first curve and the second curve is not greater than a preset similarity threshold, it is determined that there is a negative pressure risk, and if the similarity of the first curve and the second curve is greater than a preset similarity threshold, it is determined that there is no negative pressure risk.

4. The method of claim 1, wherein, Determining whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data and the fifth data comprises: If the third data represents the airflow speed variation amount is not greater than a preset variation amount threshold, a variation amount curve of a sequence of the second specified data is determined as a third curve, the second specified data is the greater data fluctuation of the third data and the fourth data; If the slope of any point of the third curve is not greater than the maximum slope of the fourth curve, it is determined that there is no negative pressure risk, the fourth curve is a variation amount curve of a sequence of the first specified data.

5. The method of claim 1, wherein, The second specified time period is positively correlated with the fluctuation degree of the first specified data.

6. The method of claim 1, wherein, The airflow detection module includes a plurality of detection units arranged along the surface of the oil fume purification equipment, and the connecting line between adjacent two detection units forms a polyline, and the airflow detection module includes the first airflow detection module and the second airflow detection module.

7. The method of claim 6, wherein, The detection unit is a hot ball type electric anemometer.

8. A residential anti-negative pressure control device, characterized by comprising: The device is applied to an oil fume purification equipment, and the oil fume purification equipment includes a fan, an air duct, an air inlet arranged at one end of the air duct, a first airflow detection module and a second airflow detection module arranged respectively at the left and right sides of the air inlet in the horizontal direction, and the device comprises: The pneumatic module is configured to start the fan to make the fan reach a preset first rotating speed in response to an opening instruction; The data acquisition first module is configured to, when the fan reaches the first rotating speed, open the first airflow detection module and the second airflow detection module, obtain a sequence of airflow speeds detected by the first airflow detection module at each time node in a first specified time period thereafter as first data, and obtain a sequence of airflow speeds detected by the second airflow detection module at each time node in the first specified time period as second data; The rotating speed adjustment module is configured to control the fan to reach a preset second rotating speed, and the second rotating speed is less than the first rotating speed; The data acquisition second module is configured to, at an instant when the fan is reduced in speed, take the airflow speed variation amount detected by a specified airflow detection module as third data, obtain a sequence of airflow speeds detected by the first airflow detection module at each time node in a second specified time period thereafter as fourth data, and obtain a sequence of airflow speeds detected by the second airflow detection module at each time node in the second specified time period as fifth data, and the specified airflow detection module is the one with greater average airflow speed detected by the first airflow detection module and the second airflow detection module in the first specified time period; The judgment module is configured to, if the difference between the maximum airflow speed and the minimum airflow speed in the sequence of the first specified data is less than a preset difference threshold, judge whether there is a negative pressure risk based on at least part of the first data, the second data, the third data, the fourth data and the fifth data, wherein the first specified data is the one with smaller data fluctuation of the first data and the second data.

9. An electronic device comprising: a processor; and ​ a memory arranged to store computer-executable instructions that, when executed, cause the processor to perform the method of any of claims 1-7.

10. A computer-readable storage medium storing one or more programs, which, when executed by an electronic device including multiple applications, cause the electronic device to perform the method of any of claims 1-7.

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