Elevator system and control method for air circulation in elevator car of elevator system

Abstract

The invention discloses an elevator system and a control method for air circulation in an elevator car of the elevator system, the elevator system comprises the elevator car provided with a fan and a human body detection device, the human body detection device is arranged in the elevator car and used for detecting whether passengers exist in the elevator car or not and generating passenger detection information when the passengers are detected, and the human body detection device is used for detecting whether the passengers exist in the elevator car or not. The method comprises the steps that passenger detection information is generated in response to the human body detection device, and the density degree of passengers in the elevator car is determined according to the generated passenger detection information; and the rotating speed of the fan is set according to the determined density degree, and the fan is controlled to operate according to the set rotating speed. As the human body detection device is arranged in the lift car, passenger detection information can be generated, the density degree of passengers can be determined according to the passenger detection information, and then the rotating speed of the fan is set in a self-adaptive mode.

Description

Technical Field

[0001] This article relates to elevator car control technology, and more particularly to an elevator system and a method for controlling air circulation in an elevator car. Background Art

[0002] With the increasing popularity of elevators, passengers' expectations for air quality within elevator cabins are constantly increasing. However, existing technologies typically set the speed of elevator cabin fans to a fixed setting, making it difficult to dynamically adjust them based on actual usage scenarios. This limits the effectiveness of improving air quality within elevator cabins. Therefore, effectively improving elevator cabin air quality is crucial for enhancing passenger experience and health. Summary of the Invention

[0003] The embodiments of the present disclosure provide an elevator system and a method for controlling air circulation in an elevator car thereof, which can determine the density of passengers in the elevator car based on passenger detection information generated by a human body detection device, and then set the fan speed, thereby effectively improving air quality and saving energy consumption.

[0004] An embodiment of the present disclosure provides a method for controlling air circulation in an elevator car, which is applied to an elevator system. The elevator system includes: an elevator car equipped with a fan; and a human body detection device, wherein the human body detection device is provided in the elevator car and is used to detect whether there is a passenger in the elevator car and generate passenger detection information when a passenger is detected. The method includes: In response to the human body detection device generating passenger detection information, determining the density of passengers in the elevator car based on the generated passenger detection information; The rotation speed of the fan is set according to the determined intensity, and the fan is controlled to operate according to the set rotation speed.

[0005] In some exemplary embodiments, the human body detection device detects whether there is a passenger in the elevator car and generates passenger detection information when a passenger is detected, including: continuously detecting whether there is a passenger in the elevator car during the process of the elevator car door opening to closing and generating passenger detection information when a passenger is detected.

[0006] In some exemplary embodiments, the human body detection device includes: a plurality of human body presence sensors, each of the human body presence sensors being configured to sense whether a passenger is present in the elevator car and generate passenger sensing information when a passenger is sensed; The determining the density of passengers in the elevator car according to the generated passenger detection information includes: Counting the number of human presence sensors that generate passenger sensing information to obtain a first number; The density of passengers in the elevator car is determined based on the first number.

[0007] In some exemplary embodiments, the human body detection device includes: an image recognition device, the image recognition device being configured to capture images within the elevator car and recognize human figures in the captured images to obtain the number of people; The determining the density of passengers in the elevator car according to the generated passenger detection information includes: The density of passengers in the elevator car is determined according to the number of people obtained by the image recognition device.

[0008] In some exemplary embodiments, the method further comprises: When the elevator car is in operation and no passenger detection information is generated by the human body detection device, the fan is controlled to stop running.

[0009] In some exemplary embodiments, the elevator system further includes an internal temperature sensor and an external temperature sensor, wherein the internal temperature sensor is configured to detect a temperature inside the elevator car and the external temperature sensor is configured to detect a temperature outside the elevator car, and the method further includes: acquiring the temperature inside the elevator car detected by the internal temperature sensor and the temperature outside the elevator car detected by the external temperature sensor; When the temperature inside the elevator car is higher than the temperature outside the elevator car, and the temperature difference between the two exceeds a preset threshold, obtaining the operating status of the elevator car; When the elevator car is not in operation, obtaining the position of the elevator car, and when the elevator car is in a level area, performing at least one of the following operations: controlling the elevator car door to open, and controlling the fan to operate; When the elevator car is in operation, the following operations are performed: controlling the fan to operate.

[0010] In some exemplary embodiments, the elevator system further comprises: an air purification device disposed in the elevator car, and the method further comprises: In response to receiving a control instruction for the air purification device, the air purification device is controlled according to the obtained control instruction.

[0011] In some exemplary embodiments, the control instruction includes an operating instruction for a specified speed. In response to the control instruction being an operating instruction for the specified speed, controlling the air purification device according to the obtained control instruction includes: The air purification device is controlled to operate at a specified speed according to the operating instruction.

[0012] In some exemplary embodiments, the method further comprises: In response to a door opening button and a door closing button in the elevator car being pressed simultaneously, determining that a control instruction for a specified speed of the air purification device is received; The designated rotation speed of the operation instruction is obtained according to the number of consecutive simultaneous pressing or the duration of simultaneous pressing.

[0013] An elevator system provided by an embodiment of the present disclosure includes: at least one elevator car provided with a fan, a human body detection device provided in the elevator car, and a control device for air circulation in the elevator car; The control device for air circulation in an elevator car includes: a memory and a processor, wherein the memory is configured to store an executable program; The processor is configured to read and execute the executable program to perform the above-mentioned method for controlling air circulation in an elevator car.

[0014] Compared with the related art, the elevator system and the method for controlling air circulation in the elevator car provided in the embodiment of the present application use the passenger detection information generated by the human body detection device installed in the elevator car to determine the density of passengers in the elevator car, and then set the fan speed accordingly, thereby realizing the adaptive setting of the fan speed according to different situations, effectively improving the air quality in the elevator car, and saving energy consumption.

[0015] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. Other advantages of the present application can be realized and obtained by the solutions described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0017] Figure 1 This is a flow chart of a method for controlling air circulation in an elevator car according to an embodiment of the present application; Figure 2 This is a flow chart of another method for controlling air circulation in an elevator car according to an embodiment of the present application; Figure 3 This is a structural diagram of an elevator system according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] This application describes multiple embodiments, but this description is exemplary rather than restrictive, and it will be apparent to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described herein. Although many possible feature combinations are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0019] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive solution. Any features or elements of any embodiment may also be combined with features or elements from other inventive solutions to form another unique inventive solution. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the appended claims and their equivalents, the embodiments are not subject to other limitations. In addition, various modifications and changes may be made within the scope of protection of the appended claims.

[0020] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As will be understood by those skilled in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can readily understand that these orders can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0021] The present disclosure provides a method for controlling air circulation in an elevator car, which is applied to an elevator system. The elevator system includes an elevator car equipped with a fan, and a human body detection device, wherein the human body detection device is arranged in the elevator car and is used to detect whether there is a passenger in the elevator car and generate passenger detection information when a passenger is detected. Figure 1 As shown, the method includes: Step 100: In response to the human body detection device generating passenger detection information, determine the density of passengers in the elevator car according to the generated passenger detection information; Step 110: Set the speed of the fan according to the determined intensity, and control the fan to operate at the set speed.

[0022] Human body detection devices can be installed on the elevator car ceiling, above the elevator car door, or in other hidden locations inside the elevator car that do not obstruct passenger traffic, such as near the control panel. These locations ensure that the detection device has good coverage of the entire elevator car space while avoiding the impact of detection caused by passengers blocking the view or standing in different positions.

[0023] Human detection devices may include one or more of the following: infrared sensors, pyroelectric sensors, millimeter-wave radars, image recognition systems, or ultrasonic sensors. Infrared sensors detect infrared radiation emitted by the human body to determine the presence of passengers; pyroelectric sensors sense changes in human temperature and movement; millimeter-wave radars use the reflection characteristics of electromagnetic waves to identify the presence and movement of living organisms; image recognition systems accurately determine the presence of humans by collecting visual images and combining them with artificial intelligence recognition algorithms; and ultrasonic sensors detect the proximity or presence of humans by emitting and receiving ultrasonic waves.

[0024] When the human detection device is an infrared sensor, the passenger detection information generated by the infrared sensor is the infrared radiation sensing signal. In practical applications, multiple infrared sensors can be used to form an array to cover the entire elevator cabin. Each infrared sensor is used to sense infrared radiation emitted by the human body and generate an infrared radiation sensing signal. The infrared radiation sensing signals generated by these infrared sensors can be used to determine the distribution of infrared radiation within the elevator cabin and, therefore, the density of passengers within the cabin.

[0025] When the human detection device is a millimeter-wave radar, the passenger detection information generated by the millimeter-wave radar is the electromagnetic wave reflection signal. In practical applications, multiple millimeter-wave radars can be used to form an array to cover the entire elevator cabin. Each millimeter-wave radar detects electromagnetic waves reflected by the human body and generates an electromagnetic wave reflection signal. The electromagnetic wave reflection signals generated by these millimeter-wave radars can be used to determine the passenger density in the elevator cabin.

[0026] When the human detection device is an image recognition system, the passenger detection information generated by the image recognition system is visual image data. In practical applications, the image capture device (e.g., a camera) of the image recognition system can be installed in a suitable location within the elevator car to ensure that it effectively covers the entire cabin space. By analyzing and processing the visual image data captured by the image capture device within the elevator car using an image recognition algorithm, the density of passengers within the elevator car can be determined.

[0027] Exemplarily, the density can be reflected by at least one of the following indicators: the number of passengers, the relative capacity ratio, and the number of people per square meter. When only a single indicator is used to measure the density, such as the number of passengers, one or more number thresholds can be defined, and the density can be determined based on the comparison between the number of passengers and the one or more defined number thresholds. Specifically, assuming that multiple number thresholds are defined, from small to large, they are the first number threshold, the second number threshold, and the second number threshold. When the number of passengers is less than the first number threshold, the density can be determined to be a lower density. When the number of passengers is not less than the first number threshold and not greater than the second number threshold, the density can be determined to be a moderate density. When the number of passengers is greater than the second number threshold, the density can be determined to be a higher density. Similarly, when a single indicator, the relative capacity ratio, is used to measure the density, one or more relative capacity ratio thresholds can also be defined, and the density can be determined based on the comparison between the relative capacity ratio and the one or more defined relative capacity ratio thresholds. When a single indicator, the number of people per square meter, is used to measure the density, one or more number thresholds per square meter can also be defined, and the density can be determined based on the comparison between the number of people per square meter and the one or more defined number thresholds per square meter. Alternatively, multiple value intervals can be divided. Taking the number of passengers as an example, when it falls into different value intervals, it can correspond to different density levels.

[0028] When using multiple indicators to determine density, a more comprehensive and accurate density assessment can be achieved by comprehensively evaluating data from multiple dimensions. For example, when using indicators such as the number of passengers, relative capacity ratio, and the number of people per square meter to measure density, the following method can be used to calculate density: Step 1: Define thresholds and corresponding density levels for each indicator; Step 2: Map the current value of each indicator to the corresponding grade score; Step 3: Assign weights to each indicator; Step 4: Calculate a comprehensive density index; Step 5: Classify the final density level based on the comprehensive index.

[0029] Setting the fan speed according to the determined density may include: setting a higher fan speed when the density is greater, and setting a lower fan speed when the density is less.

[0030] The method for controlling air circulation in an elevator car provided by the embodiments of the present disclosure uses passenger detection information generated by a human body detection device installed in the elevator car to determine the density of passengers in the elevator car, and then sets the fan speed accordingly, thereby achieving adaptive setting of the fan speed according to different situations, effectively improving the air quality in the elevator car, and saving energy consumption.

[0031] In some exemplary embodiments, the human body detection device detects whether there is a passenger in the elevator car and generates passenger detection information when a passenger is detected, including: continuously detecting whether there is a passenger in the elevator car during the process of the elevator car door opening to closing and generating passenger detection information when a passenger is detected.

[0032] Since the density of passengers determines the set fan speed, and changes in passenger density are usually caused by passengers entering or leaving the elevator car, the human detection device can continue to work during the process of opening and closing the elevator car door.

[0033] During the entire process of the elevator door moving from the open state to the closed state, the human body detection device is always in working condition, continuously detecting the interior of the elevator car to determine whether there are passengers. If a passenger is detected in the car, corresponding passenger detection information will be generated. Once passenger detection information is generated, the density of passengers in the elevator car will be determined according to the generated passenger detection information, the speed of the fan will be set according to the determined density, and the fan operation will be controlled according to the set speed.

[0034] In some exemplary embodiments, the human body detection device includes: a plurality of human body presence sensors, each of the human body presence sensors being configured to sense whether a passenger is present in the elevator car and generate passenger sensing information when a passenger is sensed; The determining the density of passengers in the elevator car according to the generated passenger detection information includes: Counting the number of human presence sensors that generate passenger sensing information to obtain a first number; The density of passengers in the elevator car is determined based on the first number.

[0035] A human presence sensor is a device that can detect the presence of a person in a specific area. It can include one or more of the following: a passive infrared (PIR) sensor and a CO2 sensor. A PIR sensor detects infrared radiation emitted by the human body and triggers a signal when someone enters or leaves the monitored area. A CO2 sensor infers the presence of a person in a space by monitoring changes in CO2 concentration in the air.

[0036] Human presence sensors have a certain detection range, so multiple human presence sensors can be deployed in the elevator car to ensure that the entire elevator car space is reasonably covered.

[0037] When multiple human presence sensors are deployed in an elevator car, the passengers in the elevator car may be unevenly distributed. This may result in some human presence sensors being able to sense passengers and generate passenger sensing information, while some human presence sensors are unable to sense passengers and accordingly do not generate passenger sensing information. It may also result in all human presence sensors sensing passengers and generating passenger sensing information. Therefore, the density of passengers in the elevator car can be determined by the number of human presence sensors that generate passenger sensing information, that is, the first number.

[0038] Exemplarily, the density of passengers in the elevator car can be determined based on the comparison between the first number and the total number, or based on the comparison between the ratio of the first number to the total number and one or more preset thresholds.

[0039] In some exemplary embodiments, determining the density of passengers in the elevator car based on the first number includes: Obtaining a density corresponding to the first number according to the first corresponding relationship, and using the obtained density as the density of passengers in the elevator car; The first corresponding relationship is a corresponding relationship between the first quantity and the density, and the value of the first quantity corresponding to a higher density is greater than the value of the first quantity corresponding to a lower density.

[0040] The first quantity and the density can have a one-to-one correspondence or a many-to-one correspondence. When the first quantity and the density have a one-to-one correspondence, one first quantity corresponds to one density, the density corresponding to the first quantity with a larger value is higher than the density corresponding to the first quantity with a smaller value, and the value of the first quantity corresponding to the higher density is greater than the value of the first quantity corresponding to the lower density. When the first quantity and the density have a many-to-one correspondence, multiple first quantities correspond to one density, and the value of the first quantity corresponding to the higher density is greater than the value of the first quantity corresponding to the lower density.

[0041] In some exemplary embodiments, when the plurality of human presence sensors include at least two human presence sensors, one of the human presence sensors is disposed on the back panel of the elevator car, and the other is disposed in any one of the following areas: a first preset area of ​​the door of the elevator car excluding the door opening / closing area, a second preset area of ​​the roof of the elevator car near the door; or The multiple human presence sensors include at least three human presence sensors, which are respectively arranged on the back plate of the elevator car, in a first preset area of ​​the elevator car door excluding the door opening and closing area, and in a second preset area on the top plate of the elevator car near the door.

[0042] In some scenarios where cost, power consumption, or installation space are limited (such as retrofitting old elevators), only a small number of sensors, such as two human presence sensors, may be deployed. Despite the small number of human presence sensors deployed, a reasonable layout can still determine the passenger density within the elevator car.

[0043] A human presence sensor is set on the back panel of the elevator car, which can effectively detect passengers standing in the middle and rear areas of the elevator, thereby covering the middle and rear spaces of the elevator car; and another sensor is set in the first preset area of ​​the car door other than the door opening and closing area, or in the second preset area on the top plate near the car door, which can detect passengers located at the elevator car door, thereby covering the front area of ​​the elevator (that is, the entrance area of ​​the car door).

[0044] Normally, after entering an elevator, passengers will prefer to stand in the relatively spacious middle or rear area. Only when the middle and rear areas are occupied will passengers gradually gather in the front area of ​​the car door. Therefore, based on the natural standing patterns of passengers in the elevator car, the two human presence sensors set up in the above manner can better determine the density of passengers in the elevator car.

[0045] In scenarios where there are not too many restrictions on cost, power consumption or installation space, in addition to the human presence sensor set on the back panel of the elevator car, a sensor can be set in the first preset area outside the door opening and closing area of ​​the car door, and in the second preset area on the top plate near the car door.

[0046] In some exemplary embodiments, the human body detection device includes: an image recognition device, the image recognition device being configured to capture images within the elevator car and recognize human figures in the captured images to obtain the number of people; The determining the density of passengers in the elevator car according to the generated passenger detection information includes: The density of passengers in the elevator car is determined according to the number of people obtained by the image recognition device.

[0047] For example, the density of passengers in an elevator car can be determined based on a comparison between the number of people obtained and the elevator's rated capacity. Alternatively, the density of passengers in an elevator car can be determined based on a comparison between the ratio of the number of people obtained to the elevator's rated capacity and one or more preset thresholds. Alternatively, the density can be determined directly based on the range of people in the car, for example, with less than three people being considered low, more than eight people being considered high, and all other conditions being considered medium.

[0048] In some exemplary embodiments, setting the fan speed according to the determined intensity includes: Acquiring a rotation speed corresponding to the determined density according to the second corresponding relationship, and setting the rotation speed of the fan according to the acquired rotation speed; The second corresponding relationship is a corresponding relationship between density and rotational speed, and the density corresponding to a higher rotational speed is higher than the density corresponding to a lower rotational speed.

[0049] The correspondence between density and speed can be one-to-one or many-to-one. When the correspondence between density and speed is one-to-one, one density corresponds to one speed, a higher density corresponds to a faster speed than a lower density, and a higher speed corresponds to a higher density than a lower speed. When the correspondence between density and speed is many-to-one, multiple density levels correspond to one speed, and a higher speed corresponds to a higher density than a lower speed.

[0050] In some exemplary embodiments, the method further comprises: When the elevator car is in operation and no passenger detection information is generated by the human body detection device, the fan is controlled to stop running.

[0051] In the related art, regardless of whether there are passengers in the elevator car, the fan is in operation as long as the elevator car is running. The method for controlling air circulation in the elevator car provided by the embodiment of the present disclosure controls the fan to stop running when the elevator car is running and the human body detection device detects that no passenger detection information is generated, thereby saving energy consumption.

[0052] In some exemplary embodiments, the elevator system further comprises: an internal temperature sensor and an external temperature sensor, wherein the internal temperature sensor is used to detect the temperature inside the elevator car, and the external temperature sensor is used to detect the temperature outside the elevator car. Figure 2 As shown, the method further includes: Step 200: Acquire the temperature inside the elevator car detected by the internal temperature sensor and the temperature outside the elevator car detected by the external temperature sensor; Step 210: When the temperature inside the elevator car is higher than the temperature outside the elevator car, and the temperature difference between the two exceeds a preset threshold, obtain the operating status of the elevator car; Step 220: When the elevator car is not in operation, obtain the position of the elevator car. When the elevator car is in a level area, perform at least one of the following operations: control the elevator car door to open, and control the fan to operate. Step 230: When the elevator car is in operation, perform the following operations: control the fan to operate.

[0053] Step 220 and step 230 are in a selective execution relationship. After executing step 210, when the operating state of the elevator car is not operating, step 220 is executed, and when the operating state of the elevator car is operating, step 230 is executed.

[0054] When the temperature inside the elevator car is higher than the ambient temperature outside the car, and the temperature difference between the two exceeds a preset threshold, it indicates that the temperature inside the car may be significantly elevated. In this case, it is necessary to cool the elevator car to prevent passengers from feeling uncomfortable due to the high temperature environment, thereby improving the riding experience and environmental comfort.

[0055] When the temperature inside the elevator car is higher than the temperature outside the elevator car, and the temperature difference between the two exceeds a preset threshold, the operating status of the elevator car can be obtained, and the cooling measures to be taken can be determined based on the operating status of the elevator car. When the elevator car is operating, the fan operation can be controlled. When the elevator car is not operating, the position of the elevator car can also be obtained. When the elevator car is in a level area, the elevator car door can be controlled to open, the fan can be controlled to operate, or a combination of the elevator car door opening control and the fan operation control can be used.

[0056] In some exemplary embodiments, the operations of controlling the fan include: acquiring a rotation speed corresponding to the generated temperature difference according to the third corresponding relationship, and controlling the fan to operate according to the acquired rotation speed; The third corresponding relationship is a corresponding relationship between temperature difference and rotational speed, and the temperature difference corresponding to a higher rotational speed is greater than the temperature difference corresponding to a lower rotational speed.

[0057] The relationship between temperature difference and speed can be one-to-one or many-to-one. When the relationship between temperature difference and speed is one-to-one, one temperature difference corresponds to one speed, a larger temperature difference corresponds to a faster speed than a smaller temperature difference, and the temperature difference corresponding to a higher speed is greater than the temperature difference corresponding to a lower speed. When the relationship between temperature difference and speed is many-to-one, multiple temperature differences correspond to one speed, and the temperature difference corresponding to a higher speed is greater than the temperature difference corresponding to a lower speed.

[0058] In some exemplary embodiments, the elevator system further comprises: an air purification device disposed in the elevator car, and the method further comprises: In response to receiving a control instruction for the air purification device, the air purification device is controlled according to the obtained control instruction.

[0059] The control instructions for the air purification device can be received through a wired or wireless communication module, or can be received through a local controller, or can be received through a voice recognition module, or can be received through a control interface (such as a button or touch panel in an elevator car).

[0060] When receiving via a wired or wireless communication module, the wired or wireless communication module (such as Wi-Fi, Bluetooth, etc.) is connected to the network and receives control instructions from the user terminal device or cloud platform. For example, if the air purification device has a built-in Wi-Fi module and is connected to the local area network, the passenger can send control instructions through the terminal device or cloud platform, and the built-in Wi-Fi module of the air purification device will receive the control instructions.

[0061] When received through a local controller, the air purification device can exist as a sub-device in the integrated control system and does not directly communicate with the outside world. In this case, the external control command is first received by the local main control unit, such as the elevator control system or building management system. The main control unit parses the received control command to determine whether the control command is applied to the air purification device. If the recognition result indicates that the control command is applied to the air purification device, the main control unit forwards the control command to the air purification device, thus completing the reception of the control command for the air purification device.

[0062] When a voice recognition module is used to receive voice commands, the control purification device can be equipped with a voice recognition module (or linked with a voice assistant) to receive the passenger's voice input. The voice recognition module analyzes the voice content through natural language processing (NLP) technology to identify the control command and the target of the control command. If it is determined that the target of the control command is the air purification device, the reception of the control command for the air purification device is completed.

[0063] The control instructions include: running instructions and stop running instructions. When the obtained control instruction is a running instruction, controlling the air purification device according to the obtained control instruction means: controlling the air purification device to run according to the obtained control instruction. When the obtained control instruction is a stop running instruction, controlling the air purification device according to the obtained control instruction means: controlling the air purification device to stop running according to the obtained control instruction.

[0064] In some exemplary embodiments, the control instruction includes an operating instruction for a specified speed. In response to the control instruction being an operating instruction for the specified speed, controlling the air purification device according to the obtained control instruction includes: The air purification device is controlled to operate at a specified speed according to the operating instruction.

[0065] In practical applications, the operation instructions may include: an operation instruction without a specified speed and an operation instruction with a specified speed.

[0066] An unspecified speed operation instruction refers to a control instruction intended solely to start the air purification device and put it into operation, without specifying the fan speed during operation. During the execution of such an instruction, the speed can be determined based on a preset strategy to control the operation of the air purification device. Determining the speed based on a preset strategy includes, but is not limited to, using a pre-set fixed speed or dynamically adjusting the speed based on current environmental parameters (such as air quality, temperature, humidity, and density).

[0067] A specified speed operating instruction means that the control instruction explicitly specifies the fan speed to be used when the air purification device is operating. During the execution of such an instruction, the air purification device can be controlled to operate at the specified speed of the control instruction.

[0068] In some exemplary embodiments, the method further comprises: In response to a door opening button and a door closing button in the elevator car being pressed simultaneously, determining that a control instruction for a specified speed of the air purification device is received; The designated rotation speed is obtained according to the number of consecutive simultaneous pressings or the duration of simultaneous pressings.

[0069] In response to a door opening button and a door closing button in the elevator car being pressed simultaneously, it is determined that a control instruction for the air purification device has been received.

[0070] When the car door opening button and the car door closing button in the elevator car are pressed at the same time and the air purification device is not running, it is determined that a control instruction for the air purification device is received, and the control instruction is an operating instruction; when the car door opening button and the car door closing button in the elevator car are pressed at the same time and the air purification device is running, it is determined that a control instruction for the air purification device is received, and the control instruction is a stop operating instruction.

[0071] In this embodiment, when the car door opening button and the car door closing button are pressed at the same time, the original functions of the car door opening button and the car door closing button, namely, "open door" and "close door", will become invalid.

[0072] The method for controlling air circulation in an elevator car provided by the embodiment of the present disclosure does not add any additional control components, and convenient control of the air purification device is achieved by reusing the existing operation buttons of the elevator.

[0073] In the embodiment of the present disclosure, pressing refers to pressing the car door opening button and the car door closing button at the same time.

[0074] When the specified speed of the operating instruction is obtained based on the number of consecutive presses, a correspondence between the number of consecutive simultaneous presses and the speed can be established in advance. In this way, after obtaining the number of consecutive simultaneous presses, the corresponding speed can be obtained based on the established correspondence. Among them, consecutive simultaneous presses refer to a group of simultaneous presses in which the press interval between each two adjacent presses is less than a preset time interval. In actual applications, the press interval between each simultaneous press and the previous simultaneous press can be calculated. When the press interval is less than the preset time interval, it is determined that the simultaneous press and the previous simultaneous press are continuous simultaneous presses. When the press interval is not less than the preset time interval, it is determined that the simultaneous press and the previous simultaneous press are not continuous simultaneous presses.

[0075] In actual application, counting can be started when it is sensed that a passenger presses the car door open button and the car door close button at the same time. During the counting process, the pressing interval between each simultaneous pressing and the last simultaneous pressing is calculated. When the pressing interval is less than the preset time interval, it is determined that the simultaneous pressing and the last simultaneous pressing are continuous pressings, and 1 is added to the sum of the calculated pressing counts. When the pressing interval is not less than the preset time interval, it is determined that the simultaneous pressing is not a continuous pressing with the last simultaneous pressing, and the currently obtained pressing count is used as the final number of continuous pressings.

[0076] When the specified speed of the running instruction is obtained according to the pressing duration, the corresponding relationship between the pressing duration and the speed can be established in advance, so that after the pressing duration is obtained, the corresponding speed can be obtained according to the established corresponding relationship.

[0077] In actual application, the timing can be started when it is sensed that the passenger presses the car door open button and the car door close button at the same time, and the timing is stopped when the passenger no longer presses the elevator call button, thereby obtaining the pressing time.

[0078] The disclosed embodiment further provides a control device for air circulation in an elevator car, characterized in that the control device comprises: a memory and a processor, the memory being configured to store an executable program; The processor is configured to read and execute the executable program to implement the method for controlling air circulation in an elevator car as described in any embodiment of the present disclosure.

[0079] The control device provided in the embodiment of the present disclosure may be a control chip.

[0080] The present disclosure also provides an elevator system. Figure 3As shown, it includes: at least one elevator car 31 provided with a fan, a human body detection device 32 provided in the elevator car, and the control device 33 for air circulation in the elevator car as described in the above embodiment.

[0081] The embodiments of the present disclosure further provide a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the method for controlling air circulation in an elevator car as described in any of the above embodiments can be implemented.

[0082] Those skilled in the art will appreciate that all or some of the steps, systems, and functional modules / units in the methods, systems, and devices disclosed above may be implemented as software, firmware, hardware, or any combination thereof. In hardware implementations, the division between functional modules / units described above does not necessarily correspond to the division between physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is well known to those skilled in the art, the term "computer storage media" encompasses volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims

1. A method for controlling air circulation in an elevator car, characterized in that: Applied to an elevator system, the elevator system includes: an elevator car equipped with a fan, and a human body detection device, the human body detection device is arranged in the elevator car, and is used to detect whether there is a passenger in the elevator car and generate passenger detection information when a passenger is detected. The method includes: In response to the human body detection device generating passenger detection information, determining the density of passengers in the elevator car based on the generated passenger detection information; The rotation speed of the fan is set according to the determined intensity, and the fan is controlled to operate according to the set rotation speed.

2. The method according to claim 1, characterized in that The human body detection device detects whether there is a passenger in the elevator car and generates passenger detection information when a passenger is detected, including: continuously detecting whether there is a passenger in the elevator car during the process of opening and closing the elevator car door and generating passenger detection information when a passenger is detected.

3. The method according to claim 1 or 2, characterized in that The human body detection device includes: a plurality of human body presence sensors, each of the human body presence sensors is used to sense whether there is a passenger in the elevator car and generate passenger sensing information when a passenger is sensed; The determining the density of passengers in the elevator car according to the generated passenger detection information includes: Counting the number of human presence sensors that generate passenger sensing information to obtain a first number; The density of passengers in the elevator car is determined based on the first number.

4. The method according to claim 1 or 2, characterized in that The human body detection device includes: an image recognition device, the image recognition device is used to collect images in the elevator car and recognize human images in the collected images to obtain the number of people; The determining the density of passengers in the elevator car according to the generated passenger detection information includes: The density of passengers in the elevator car is determined according to the number of people obtained by the image recognition device.

5. The method according to claim 1, wherein The method further comprises: When the elevator car is in operation and no passenger detection information is generated by the human body detection device, the fan is controlled to stop running.

6. The method according to claim 1, characterized in that The elevator system further includes an internal temperature sensor and an external temperature sensor, wherein the internal temperature sensor is used to detect the temperature inside the elevator car, and the external temperature sensor is used to detect the temperature outside the elevator car. The method further includes: acquiring the temperature inside the elevator car detected by the internal temperature sensor and the temperature outside the elevator car detected by the external temperature sensor; When the temperature inside the elevator car is higher than the temperature outside the elevator car, and the temperature difference between the two exceeds a preset threshold, obtaining the operating status of the elevator car; When the elevator car is not in operation, obtaining the position of the elevator car, and when the elevator car is in a level area, performing at least one of the following operations: controlling the elevator car door to open, and controlling the fan to operate; When the elevator car is in operation, the following operations are performed: controlling the fan to operate.

7. The method according to claim 1, characterized in that The elevator system further includes: an air purification device disposed in the elevator car, and the method further includes: In response to receiving a control instruction for the air purification device, the air purification device is controlled according to the obtained control instruction.

8. The method according to claim 7, characterized in that The control instruction includes an operation instruction for a specified speed. In response to the control instruction being the operation instruction for the specified speed, controlling the air purification device according to the obtained control instruction includes: The air purification device is controlled to operate at a specified speed according to the operating instruction.

9. The method according to claim 8, characterized in that The method further comprises: In response to a door opening button and a door closing button in the elevator car being pressed simultaneously, determining that a control instruction for a specified speed of the air purification device is received; The designated rotation speed is obtained according to the number of consecutive simultaneous pressings or the duration of simultaneous pressings.

10. An elevator system, characterized in that: include: At least one elevator car equipped with a fan, a human body detection device arranged in the elevator car, and a control device for air circulation in the elevator car; The control device for air circulation in an elevator car includes: a memory and a processor, wherein the memory is configured to store an executable program; The processor is configured to read and execute the executable program to perform the method for controlling air circulation in an elevator car according to any one of claims 1 to 9.

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