Exhaust device, exhaust device control method and system, and readable storage medium

Abstract

The present invention provides an exhaust device, an exhaust device control method, an exhaust device control system and a computer-readable storage medium. The exhaust device includes: an exhaust channel, an air inlet and an air outlet are arranged on the exhaust channel; an electric air valve is arranged on the exhaust channel, and the electric air valve is used to open or close the air inlet; an electric fan is connected to the air outlet, and the electric fan extracts the gas in the exhaust channel; a controller is connected to the electric air valve and the electric fan, and the controller controls the electric air valve to adjust the opening, and the controller controls the working frequency of the electric fan. Closing the air inlet that is not needed can avoid the exhaust device from generating unnecessary noise, and can also weaken the negative pressure phenomenon generated by the exhaust channel during the working process. Thereby achieving the technical effect of optimizing the exhaust device, reducing the energy consumption and working noise of the exhaust device, reducing the negative pressure phenomenon of the exhaust device, reducing the cost of product use, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust equipment, and in particular to an exhaust device, an exhaust device control method, an exhaust device control system and a computer-readable storage medium. Background Art

[0002] At present, the general working mode of the floor exhaust system used in hot pot and barbecue restaurants is: each table uses a set of exhaust ducts, and the inverter is used to control the motor to run at a fixed frequency. In this way, all air valves must be opened regardless of the number of guests during business hours, and the motor works under a higher load. This causes energy waste during low business peak hours, unnecessary noise, and negative pressure caused by excessive exhaust. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides an exhaust device.

[0005] A second aspect of the present invention provides a method for controlling an exhaust device.

[0006] A third aspect of the present invention provides an exhaust device control system.

[0007] A fourth aspect of the present invention provides a computer-readable storage medium.

[0008] In view of this, the first aspect of the present invention provides an exhaust device, which includes: an exhaust channel, on which an air inlet and an air outlet are arranged; an electric air valve, which is arranged on the exhaust channel, and is used to open or close the air inlet; an electric fan, which is connected to the air outlet, and the electric fan extracts gas in the exhaust channel; a controller, which is connected to the electric air valve and the electric fan, and the controller controls the electric air valve to adjust the opening, and the controller controls the working frequency of the electric fan.

[0009] In the technical scheme, an exhaust device is defined, which is used in restaurants that produce a lot of oil smoke or steam, such as barbecue restaurants and hot pot restaurants. The exhaust device is provided with an exhaust channel, an electric air valve and a controller. The exhaust channel is provided with an air inlet, and the gas to be exhausted enters the exhaust channel from the air inlet and is exhausted. The electric air valve is arranged on the exhaust channel, and each air inlet is correspondingly provided with an electric air valve, and the electric air valve can adjust the size of the opening under electric drive to achieve the adjustment of the size of the air intake of the air inlet. The controller is connected to the electric air valve and is used to control the electric air valve to adjust the opening to a size that meets the working requirements. By arranging an electric air valve with adjustable opening at the air inlet of the exhaust device and a corresponding controller for controlling the operation of the electric air valve, the exhaust device can intelligently control the opening size of the electric air valve through the controller during operation. When exhaust is required at some of the air inlets, the controller controls the electric air valve to open, calculates the required opening of the electric air valve, and controls the electric air valve to adjust to the opening. Thereby, the air inlets on the exhaust device can be automatically opened and closed according to actual needs. For example, when some dining tables are not in use, the electric air valves at the corresponding air inlets are closed, and when other dining tables are in use, the electric air valves at the corresponding air inlets are opened. By closing the air inlets that are not needed, the load of the electric fan in the exhaust device can be reduced, thereby reducing the power of the electric fan and saving energy. In addition, closing the air inlets that are not needed can avoid unnecessary noise generated by the exhaust device, and can also weaken the negative pressure phenomenon generated by the exhaust channel during the working process. Thereby optimizing the exhaust device, reducing the energy consumption and working noise of the exhaust device, reducing the negative pressure phenomenon of the exhaust device, reducing the cost of product use, and improving the technical effect of user experience are achieved.

[0010] The exhaust channel is also provided with an air outlet, and the gas enters the exhaust channel from the air inlet and is discharged from the exhaust channel from the air outlet. The exhaust device is also provided with an electric fan, which is connected to the air outlet. During operation, the electric fan extracts the gas in the exhaust channel from the air outlet through the rotating wind wheel to realize the exhaust function of the exhaust device. Specifically, the electric fan is connected to the controller. During operation, the controller calculates the target operating frequency of the electric fan according to the number of electric air valves opened, the relative position of the opened electric air valves in the exhaust channel, and the shape of the air duct. Thereafter, the electric fan is controlled to work according to the target operating frequency. For example: when the number of tables used in the restaurant is small, the exhaust demand is small, and the controller reduces the operating frequency of the electric fan to reduce energy consumption and noise and reduce negative pressure; when the number of tables used in the restaurant is large, the exhaust demand is large, and the controller increases the operating frequency of the electric fan to meet the exhaust demand. Thus, the technical effect of optimizing the exhaust device, improving the intelligence and automation of the exhaust device, reducing the energy consumption of the exhaust device, and improving the user experience is achieved.

[0011] In addition, the exhaust device in the above technical solution provided by the present invention may also have the following additional technical features:

[0012] In the above technical solution, preferably, the air inlet is configured to be suitable for being set relative to the cooking equipment, and the controller includes: a control box, connected to the electric air valve; a current sensor, arranged on the control box, and the current sensor is configured to be suitable for being connected to the cooking equipment; wherein the control box controls the electric air valve to adjust the opening according to the ignition signal collected by the current sensor.

[0013] In this technical solution, during the assembly process, the air inlet is arranged relative to the cooking equipment on the dining table in the restaurant, ensuring that the air inlet can suck the oil smoke or steam generated by the cooking equipment into the exhaust channel and discharge it to the outside. Specifically, a current sensor is provided on the controller, and the current sensor is respectively connected to the cooking equipment corresponding to each air inlet. During operation, the current sensor receives the ignition signal of the cooking equipment. The controller controls the opening or closing of the electric air valve on the air inlet corresponding to the cooking equipment that sends the ignition signal according to the received ignition signal, and controls the specific opening of the electric air valve. As a result, the electric air valve can automatically open when there is an exhaust demand, and automatically close when there is no exhaust demand, and on this basis, adjust the opening automatically according to the size of the exhaust demand. In this way, the technical effect of optimizing the control structure of the exhaust device, improving the intelligence and automation of the exhaust device, reducing energy consumption and noise, reducing negative pressure, and improving the user experience is achieved.

[0014] In any of the above technical solutions, preferably, the exhaust device also includes: a pressure sensor, which is arranged on the exhaust passage and connected to the control box, and the controller controls the operation of the electric fan according to the pressure value sensed by the pressure sensor.

[0015] In this technical solution, another control device for the electric fan is introduced. Specifically, a pressure sensor is arranged on the exhaust passage, and a pressure sensor is arranged on each air inlet, and the pressure sensor is connected to the control box. During operation, when the electric air valve corresponding to the air inlet is opened, the pressure sensor corresponding to the air inlet will detect the corresponding air pressure value, and then the controller controls the electric fan to adjust the working frequency according to the pressure value. Thereby, the automatic control and intelligent control of the electric fan are completed, and the technical effect of optimizing the structure of the exhaust device, improving the working reliability of the exhaust device, and improving the user experience is achieved.

[0016] Furthermore, the pressure sensor includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged inside the exhaust passage (not the air outlet) to measure the air pressure value inside the exhaust passage, and the second pressure sensor is arranged at the air inlet to measure the pressure value at the air inlet, wherein the first pressure sensor and the second pressure sensor are both connected to the control box. During operation, the controller analyzes whether the current operating frequency of the electric fan meets the demand based on the first pressure value and the second pressure value. After analyzing that the current operating frequency of the electric fan does not meet the demand, the operating frequency of the electric fan is adjusted accordingly according to the result. This achieves the technical effect of optimizing the structure of the exhaust device, improving the automation and intelligence of the electric fan, and improving the user experience.

[0017] In any of the above technical solutions, preferably, the controller also includes: a control host, which is connected to the control box and the electric fan respectively, and the control host controls the operating frequency of the electric fan according to the information in the control box.

[0018] In this technical solution, the controller structure is further limited. The controller consists of two parts: a control box and a control host. The control box is connected to the electric air valve and pressure sensor in the aforementioned technical solution. One end of the control host is connected to the control box, and the other end is connected to the electric fan. During operation, the control box obtains the working information of the electric air valve and pressure sensor at each air inlet, and sends the working information to the control host. The working host analyzes and calculates the working information to control the electric fan according to the analysis results and the calculation results, thereby ensuring that the working frequency of the electric fan matches the actual exhaust demand. By limiting the controller to consist of a control box and a control host, the structural layout of the controller in the exhaust device can be optimized. The control box is set close to the air inlet to control the operation of the electric air valve and receive the working information of the electric air valve and the pressure sensor at the same time. The control host is separated from the control box and can be specifically set outside the exhaust channel, thereby reducing the difficulty of assembly and maintenance of the control host.

[0019] A second aspect of the present invention provides an exhaust device control method, which includes: acquiring an ignition signal of a cooking device; generating a first control instruction according to the ignition signal; and controlling the operation of an electric air valve through the first control instruction.

[0020] In the technical solution, a method for controlling an exhaust device is defined, and the control method is used to control the exhaust device defined in any of the above technical solutions. During operation, an ignition signal of a cooking device is obtained from the cooking device, and then a first control instruction is generated according to the ignition signal, and the operation of the electric air valve is controlled by the first control instruction. The ignition signal of the cooking device can reflect the working state of the cooking device, and the ignition signal exists in the entire working process of the cooking device. By obtaining the ignition signal of the cooking device, it can be known that the cooking device corresponding to the ignition signal is in an open state. By generating the first control instruction according to the ignition signal and controlling the operation of the electric air valve according to the first control instruction, the electric air valve can be closed when the cooking device corresponding to it is not turned on, and opened together with the cooking device that can be turned on later, and further adjusted according to the working information of the cooking device reflected by the ignition signal. For example, when some dining tables are not used, the electric air valve at the air inlet corresponding to them is closed, and when another part of the dining table is used, the electric air valve at the air inlet corresponding to them is opened and the opening of the electric air valve is adjusted. By closing the air inlets that are not needed and adjusting the opening of the electric air valve, the load of the electric fan in the exhaust device can be reduced, thereby reducing the power of the electric fan and saving energy. Closing the air inlets that are not needed can avoid unnecessary noise from the exhaust device and weaken the negative pressure phenomenon generated by the exhaust channel during operation. This can optimize the exhaust device, reduce the energy consumption and working noise of the exhaust device, reduce the negative pressure phenomenon of the exhaust device, reduce the cost of product use, and improve the user experience.

[0021] In any of the above technical solutions, preferably, the exhaust device control method also includes: generating a second control instruction according to the ignition signal and pre-stored air duct information; and controlling the operation of the electric blower according to the second control instruction.

[0022] In this technical solution, after the electric air valve is controlled to work according to the ignition signal, a second control instruction can be generated according to the ignition signal and the pre-stored air duct information, and then the electric fan is controlled to work through the second control instruction. According to the above technical solution, the ignition signal can reflect the working state of the electric air valve, and the second control instruction generated by combining the ignition signal and the pre-stored air duct information can reflect the target operating frequency of the electric fan under the current exhaust demand. Controlling the electric fan through the second control instruction can make the electric fan meet the current exhaust demand, thereby avoiding energy waste, unnecessary noise and negative pressure caused by excessive power on the one hand; and avoiding the problem of incomplete exhaust caused by insufficient power on the other hand. This can optimize the exhaust device control method, improve control accuracy and reliability, reduce energy loss and negative pressure, and enhance the user experience.

[0023] In any of the above technical solutions, preferably, the step of generating a second control instruction based on the ignition signal and pre-stored air duct information specifically includes: determining the electric air valve working information based on the ignition signal; generating current exhaust channel information based on the electric air valve working information and pre-stored exhaust channel information; generating a second control instruction based on the electric air valve working information and current exhaust channel information.

[0024] In this technical solution, specific restrictions are made on the steps of how to generate the second control instruction. Specifically, the working information of the electric air valve is first determined according to the ignition signal, and then the current exhaust channel information is generated according to the working information of the electric air valve and the pre-stored air duct information, and finally the second control instruction is generated according to the working information of the electric air valve and the current exhaust channel information. Among them, the working information of the electric air valve includes whether the electric air valve is open and the opening degree of the opened electric air valve. The pre-stored exhaust channel information includes the shape of the exhaust channel and the relative positions of each electric air valve and the air inlet in the exhaust channel. The current exhaust channel information obtained by combining the working information of the electric air valve and the pre-stored exhaust channel information can reflect the actual exhaust path after some electric air valves are closed. Thereby, the second control instruction generated by comprehensively calculating the working information of the electric air valve and the current exhaust channel information can control the electric fan to adjust the working frequency to the target power that meets the exhaust demand.

[0025] Furthermore, the second control instruction is the target frequency of the electric fan, and the algorithm of the target frequency is described as follows:

[0026] The calculation formula is:

[0027]

[0028] According to the position of the air inlet in the air duct, the position factor a is preset;

[0029] According to the length from the air outlet to the nearest air inlet, the minimum operating frequency C of the air duct is preset;

[0030] The actual measurement shows that the full opening achieves the desired effect, and the maximum operating frequency D of the inverter is set;

[0031] Freq is the calculated target frequency, α represents the open electric damper, and β represents all electric dampers.

[0032] In any of the above technical solutions, preferably, the pressure value inside the exhaust channel is a first pressure value, and the pressure value at the air inlet is a second pressure value, and the exhaust device control method also includes: obtaining the first pressure value and the second pressure value; calculating the absolute value of the difference between the first pressure value and the second pressure value; based on the absolute value of the difference being greater than a first threshold, generating a third control instruction to reduce the operating frequency of the electric fan; based on the absolute value of the difference being less than a second threshold, generating a third control instruction to increase the operating frequency of the electric fan; controlling the operation of the electric fan according to the third control instruction; wherein the first threshold is greater than the second threshold.

[0033] In this technical solution, another control process for the electric fan is defined. Specifically, the internal pressure value of the exhaust channel sensed by the pressure sensor is a first pressure value, and the pressure value at the air inlet sensed by the pressure sensor is a second pressure value. During the working process, the first pressure value and the second pressure value are first obtained, and the absolute value of the difference between the first pressure value and the second pressure value is calculated, and then the absolute value of the calculated difference is compared with the pre-stored first threshold value and the second threshold value: when the absolute value of the calculated difference is greater than the first threshold value, it reflects that the current operating frequency of the electric fan exceeds the current exhaust demand, thereby generating a third control instruction to reduce the operating frequency of the electric fan, so as to adjust the operating frequency of the electric fan to a reasonable operating frequency through the third control instruction; accordingly, when the absolute value of the calculated difference is less than the second threshold value, it reflects that the current operating frequency of the electric fan exceeds the current exhaust demand, thereby generating a third control instruction to reduce the operating frequency of the electric fan, so as to adjust the operating frequency of the electric fan to a reasonable operating frequency through the third control instruction. Thus, on the one hand, energy waste, unnecessary noise and negative pressure caused by excessive power are avoided; on the other hand, the problem of incomplete exhaust caused by insufficient power is avoided. This can optimize the exhaust device control method, improve control accuracy and reliability, reduce energy loss and negative pressure, and enhance user experience.

[0034] The third aspect of the present invention provides an exhaust device control system, which includes: a memory configured to store a computer program; a processor configured to execute the computer program to implement the exhaust device control method defined in any of the above-mentioned technical solutions. As a result, the exhaust device control system includes all the beneficial effects of the exhaust device control method provided in any of the above-mentioned technical solutions, which will not be repeated here.

[0035] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the exhaust device control method provided in any of the above-mentioned technical solutions is implemented. Thus, the computer-readable storage medium includes all the beneficial effects of the exhaust device control method provided in any of the above-mentioned technical solutions, which will not be repeated here.

[0036] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 A schematic structural diagram of an exhaust device according to an embodiment of the present invention is shown;

[0039] Figure 2 A schematic structural diagram of an exhaust device according to another embodiment of the present invention is shown;

[0040] Figure 3 A schematic diagram showing the structure of a controller of an exhaust device according to an embodiment of the present invention is shown;

[0041] Figure 4 A schematic diagram showing the structure of a controller of an exhaust device according to another embodiment of the present invention is shown;

[0042] Figure 5 A flow chart showing a method for controlling an exhaust device according to an embodiment of the present invention is shown;

[0043] Figure 6 A flow chart showing a method for controlling an exhaust device according to another embodiment of the present invention is shown;

[0044] Figure 7 A flow chart showing a method for controlling an exhaust device according to another embodiment of the present invention is shown;

[0045] Figure 8 A flow chart showing a method for controlling an exhaust device according to another embodiment of the present invention is shown;

[0046] Fig. 9 A structural block diagram of an exhaust device control system according to an embodiment of the present invention is shown.

[0047] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0048] 1 exhaust device, 3 exhaust channel, 32 air inlet, 34 air outlet, 5 electric air valve, 7 controller, 70 control box, 702 current sensor, 704 wireless transmitter, 72 control host, 722 wireless receiver, 74 transmission line, 9 cooking equipment. DETAILED DESCRIPTION

[0049] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0050] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0051] Refer to the following Figures 1 to 9 The exhaust device 1, the exhaust device control method, the exhaust device control system and the computer-readable storage medium provided according to some embodiments of the present invention are described.

[0052] like Figure 1 and Figure 2 As shown, in an embodiment of the first aspect of the present invention, an exhaust device 1 is provided, and the exhaust device 1 includes: an exhaust channel 3, on which an air inlet 32 ​​and an air outlet 34 are arranged; an electric air valve 5, which is arranged on the exhaust channel 3, and the electric air valve 5 is used to open or close the air inlet 32; an electric fan, which is connected to the air outlet 34, and the electric fan extracts the gas in the exhaust channel 3; a controller 7, which is connected to the electric air valve 5 and the electric fan, and the controller 7 controls the electric air valve 5 to adjust the opening, and the controller 7 controls the working frequency of the electric fan.

[0053] In this embodiment, an exhaust device 1 is defined, and the exhaust device 1 is used in restaurants that generate a large amount of oil smoke or steam, such as barbecue restaurants and hot pot restaurants. The exhaust device 1 is provided with an exhaust channel 3, an electric air valve 5 and a controller 7. The exhaust channel 3 is provided with an air inlet 32, and the gas to be exhausted enters the exhaust channel 3 from the air inlet 32 ​​and is exhausted. The electric air valve 5 is arranged on the exhaust channel 3, and each air inlet 32 ​​is correspondingly provided with an electric air valve 5. The electric air valve 5 can adjust the size of the opening under electric drive to achieve the adjustment of the air intake size of the air inlet 32. The controller 7 is connected to the electric air valve 5, and is used to control the electric air valve 5 to adjust the opening to a size that meets the working requirements. By providing an electric air valve 5 with adjustable opening at the air inlet 32 ​​of the exhaust device 1 and a corresponding controller 7 for controlling the operation of the electric air valve 5, the exhaust device 1 can intelligently control the opening of the electric air valve 5 through the controller 7 during operation. When exhaust is required at some of the air inlets 32, the controller 7 controls the electric air valve 5 to open, calculates the required opening of the electric air valve 5, and controls the electric air valve 5 to adjust to the opening. Thus, the air inlet 32 ​​on the exhaust device 1 can be automatically opened and closed according to actual needs. For example, when some dining tables are not in use, the electric air valve 5 at the corresponding air inlet 32 ​​is closed, and when another part of the dining tables is in use, the electric air valve 5 at the corresponding air inlet 32 ​​is opened. By closing the air inlet 32 ​​that is not needed, the load of the electric fan in the exhaust device 1 can be reduced, thereby reducing the power of the electric fan and saving energy. In addition, closing the air inlet 32 ​​that is not needed can avoid the exhaust device 1 from generating unnecessary noise, and can also weaken the negative pressure phenomenon generated by the exhaust channel 3 during operation. This achieves the technical effect of optimizing the exhaust device 1, reducing the energy consumption and working noise of the exhaust device 1, reducing the negative pressure phenomenon of the exhaust device 1, reducing the product use cost, and improving the user experience.

[0054] The exhaust passage 3 is also provided with an air outlet 34, and the gas enters the exhaust passage 3 from the air inlet 32 ​​and is discharged from the exhaust passage 3 from the air outlet 34. The exhaust device 1 is also provided with an electric fan, which is connected to the air outlet 34. During operation, the electric fan draws the gas in the exhaust passage 3 from the air outlet 34 through the rotating wind wheel to realize the exhaust function of the exhaust device 1. Specifically, the electric fan is connected to the controller 7. During operation, the controller 7 calculates the target operating frequency of the electric fan according to the number of electric air valves 5 opened, the relative position of the opened electric air valves 5 in the exhaust passage 3, and the shape of the air duct. Thereafter, the electric fan is controlled to work according to the target operating frequency. For example: when the number of tables used in the restaurant is small, the exhaust demand is small, and the controller 7 reduces the operating frequency of the electric fan to reduce energy consumption and noise and reduce negative pressure; when the number of tables used in the restaurant is large, the exhaust demand is large, and the controller 7 increases the operating frequency of the electric fan to meet the exhaust demand. This achieves the technical effect of optimizing the exhaust device 1, improving the intelligence and automation of the exhaust device 1, reducing the energy consumption of the exhaust device 1, and improving the user experience.

[0055] In one embodiment of the present invention, further, Figure 3 As shown, the air inlet 32 ​​is configured to be suitable for being arranged opposite to the cooking device 9, and the controller 7 includes: a control box 70, which is connected to the electric air valve 5; a current sensor 702, which is arranged on the control box 70, and the current sensor 702 is configured to be suitable for being connected to the cooking device 9; wherein the control box 70 controls the electric air valve 5 to adjust the opening according to the ignition signal collected by the current sensor 702.

[0056] In this embodiment, during the assembly process, the air inlet 32 ​​is arranged opposite to the cooking equipment 9 on the dining table in the restaurant, so that the air inlet 32 ​​can suck the oil smoke or steam generated by the cooking equipment 9 into the exhaust channel 3 and discharge it to the outside. Specifically, the controller 7 is provided with a current sensor 702, which is respectively connected to the cooking equipment 9 corresponding to each air inlet 32. During the operation, the current sensor 702 receives the ignition signal of the cooking equipment 9. The controller 7 controls the opening or closing of the electric air valve 5 on the air inlet 32 ​​corresponding to the cooking equipment 9 that sends the ignition signal according to the received ignition signal, and controls the specific opening of the electric air valve 5. Therefore, the electric air valve 5 can automatically open when there is a demand for exhaust, and automatically close when there is no demand for exhaust, and on this basis, adjust the opening automatically according to the size of the exhaust demand. In this way, the control structure of the exhaust device 1 is optimized, the degree of intelligence and automation of the exhaust device 1 is improved, energy consumption and noise are reduced, negative pressure phenomenon is reduced, and the technical effect of improving the user experience is achieved.

[0057] In one embodiment of the present invention, further, the exhaust device 1 also includes: a pressure sensor, which is arranged on the exhaust passage 3 and connected to the control box 70, and the controller 7 controls the operation of the electric fan according to the pressure value sensed by the pressure sensor.

[0058] In this embodiment, another control device for the electric fan is introduced. Specifically, a pressure sensor is provided on the exhaust passage 3, and a pressure sensor is correspondingly provided on each air inlet 32, and the pressure sensor is connected to the control box 70. During operation, when the electric air valve 5 corresponding to the air inlet 32 ​​is opened, the pressure sensor corresponding to the air inlet 32 ​​will detect the corresponding air pressure value, and then the controller 7 controls the electric fan to adjust the working frequency according to the pressure value. Thereby, the automatic control and intelligent control of the electric fan are completed, and the technical effect of optimizing the structure of the exhaust device 1, improving the working reliability of the exhaust device 1, and improving the user experience is achieved.

[0059] Furthermore, the pressure sensor includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged inside the exhaust passage 3 (not the air outlet 34) to measure the air pressure value inside the exhaust passage 3, and the second pressure sensor is arranged at the air inlet 32 ​​to measure the pressure value at the air inlet 32, wherein the first pressure sensor and the second pressure sensor are both connected to the control box 70. During operation, the controller 7 analyzes whether the current operating frequency of the electric fan meets the requirements according to the first pressure value and the second pressure value. After analyzing that the current operating frequency of the electric fan does not meet the requirements, the operating frequency of the electric fan is adjusted accordingly according to the result. This achieves the technical effect of optimizing the structure of the exhaust device 1, improving the automation and intelligence of the electric fan, and improving the user experience.

[0060] In one embodiment of the present invention, further, Figure 3 As shown, the controller 7 also includes: a control host 72, which is connected to the control box 70 and the electric fan respectively. The control host 72 controls the working frequency of the electric fan according to the information in the control box 70.

[0061] In this embodiment, the structure of the controller 7 is further limited. The controller 7 consists of a control box 70 and a control host 72. The control box 70 is connected to the electric air valve 5 and the pressure sensor in the above technical solution. One end of the control host 72 is connected to the control box 70, and the other end is connected to the electric fan. During operation, the control box 70 obtains the working information of the electric air valve 5 and the pressure sensor at each air inlet 32, and sends the working information to the control host 72. The working host analyzes and calculates the working information to control the electric fan according to the analysis results and the calculation results, so as to ensure that the working frequency of the electric fan matches the actual exhaust demand. By limiting the controller 7 to consist of the control box 70 and the control host 72, the structural layout of the controller 7 in the exhaust device 1 can be optimized. The control box 70 is set close to the air inlet 32 ​​to control the operation of the electric air valve 5, and receives the working information of the electric air valve 5 and the pressure sensor at the same time. The control host 72 is separated from the control box 70, and can be specifically set outside the exhaust channel 3, thereby reducing the difficulty of assembly and maintenance of the control host 72.

[0062] like Figure 5 As shown, the second aspect of the present invention provides an exhaust device control method, the exhaust device control method comprising:

[0063] Step S302: obtaining an ignition signal of a cooking device;

[0064] Step S304: generating a first control instruction according to the ignition signal;

[0065] Step S306: Control the operation of the electric air valve through the first control instruction.

[0066] In this embodiment, a method for controlling an exhaust device is defined, and the control method is used to control the exhaust device defined in any of the above technical solutions. During operation, an ignition signal of the cooking device is obtained from the cooking device, and then a first control instruction is generated according to the ignition signal, and the electric air valve is controlled to work by the first control instruction. The ignition signal of the cooking device can reflect the working state of the cooking device. The ignition signal exists in the entire working process of the cooking device. By obtaining the ignition signal of the cooking device, it can be known that the cooking device corresponding to the ignition signal is in an open state. By generating the first control instruction according to the ignition signal and controlling the electric air valve to work according to the first control instruction, the electric air valve can be closed when the corresponding cooking device is not turned on, and opened together with the cooking device that can be turned on later, and further adjusted according to the working information of the cooking device reflected by the ignition signal. For example, when some dining tables are not used, the electric air valve at the air inlet corresponding to them is closed, and when another part of the dining table is used, the electric air valve at the air inlet corresponding to them is opened and the opening of the electric air valve is adjusted. By closing the air inlets that are not needed and adjusting the opening of the electric air valve, the load of the electric fan in the exhaust device can be reduced, thereby reducing the power of the electric fan and saving energy. Closing the air inlets that are not needed can avoid unnecessary noise from the exhaust device and weaken the negative pressure phenomenon generated by the exhaust channel during operation. This can optimize the exhaust device, reduce the energy consumption and working noise of the exhaust device, reduce the negative pressure phenomenon of the exhaust device, reduce the cost of product use, and improve the user experience.

[0067] In one embodiment of the present invention, further, Figure 6 As shown, the exhaust device control method includes:

[0068] Step S402: obtaining an ignition signal of a cooking device;

[0069] Step S404: generating a first control instruction according to the ignition signal;

[0070] Step S406: Controlling the operation of the electric air valve through the first control instruction;

[0071] Step S408: generating a second control instruction according to the ignition signal and the pre-stored air duct information;

[0072] Step S410: Control the electric fan to operate according to the second control instruction.

[0073] In this embodiment, after the electric air valve is controlled to work according to the ignition signal, a second control instruction can be generated according to the ignition signal and the pre-stored air duct information, and then the electric fan is controlled to work through the second control instruction. According to the above technical solution, the ignition signal can reflect the working state of the electric air valve, and the second control instruction generated by combining the ignition signal and the pre-stored air duct information can reflect the target operating frequency of the electric fan under the current exhaust demand. Controlling the electric fan through the second control instruction can make the electric fan meet the current exhaust demand, thereby avoiding energy waste, unnecessary noise and negative pressure caused by excessive power on the one hand; and avoiding the problem of incomplete exhaust caused by insufficient power on the other hand. Thereby optimizing the exhaust device control method, improving control accuracy and reliability, reducing energy loss and negative pressure, and improving the user experience.

[0074] In one embodiment of the present invention, further, Figure 7 As shown, the exhaust device control method includes:

[0075] Step S502: obtaining an ignition signal of a cooking device;

[0076] Step S504: generating a first control instruction according to the ignition signal;

[0077] Step S506: Controlling the operation of the electric air valve through the first control instruction;

[0078] Step S508: determining the working information of the electric air valve according to the ignition signal;

[0079] Step S510: generating current exhaust channel information according to the electric air valve working information and the pre-stored exhaust channel information;

[0080] Step S512: generating a second control instruction according to the electric air valve working information and the current exhaust channel information;

[0081] Step S514: Control the electric fan to operate according to the second control instruction.

[0082] In this embodiment, the steps of how to generate the second control instruction are specifically defined. Specifically, the working information of the electric air valve is first determined according to the ignition signal, and then the current exhaust channel information is generated according to the working information of the electric air valve and the pre-stored air duct information, and finally the second control instruction is generated according to the working information of the electric air valve and the current exhaust channel information. Among them, the working information of the electric air valve includes whether the electric air valve is open and the opening degree of the opened electric air valve. The pre-stored exhaust channel information includes the shape of the exhaust channel and the relative positions of each electric air valve and the air inlet in the exhaust channel. The current exhaust channel information obtained by combining the working information of the electric air valve and the pre-stored exhaust channel information can reflect the actual exhaust path after some electric air valves are closed. Thereby, the second control instruction generated by comprehensively calculating the working information of the electric air valve and the current exhaust channel information can control the electric fan to adjust the working frequency to the target power that meets the exhaust demand.

[0083] Furthermore, the second control instruction is the target frequency of the electric fan, and the algorithm of the target frequency is described as follows:

[0084] The calculation formula is:

[0085]

[0086] According to the position of the air inlet in the air duct, the position factor a is preset;

[0087] According to the length from the air outlet to the nearest air inlet, the minimum operating frequency C of the air duct is preset;

[0088] The actual measurement shows that the full opening achieves the desired effect, and the maximum operating frequency D of the inverter is set;

[0089] Freq is the calculated target frequency, α represents the open electric damper, and β represents all electric dampers.

[0090] In one embodiment of the present invention, further, Figure 8 As shown, the exhaust device control method includes:

[0091] Step S602: obtaining an ignition signal of a cooking device;

[0092] Step S604: generating a first control instruction according to the ignition signal;

[0093] Step S606: Controlling the operation of the electric air valve through the first control instruction;

[0094] Step S608: Acquire a first pressure value and a second pressure value;

[0095] Step S610: calculating the absolute value of the difference between the first pressure value and the second pressure value;

[0096] Step S612: based on the absolute value of the difference being greater than the first threshold, generating a third control instruction for reducing the operating frequency of the electric fan; based on the absolute value of the difference being less than the second threshold, generating a third control instruction for increasing the operating frequency of the electric fan;

[0097] Step S614: Control the electric fan to operate according to the third control instruction.

[0098] The pressure value inside the exhaust passage is a first pressure value, the pressure value at the air inlet is a second pressure value, and the first threshold is greater than the second threshold.

[0099] In this embodiment, another control process for the electric fan is defined. Specifically, the internal pressure value of the exhaust channel sensed by the pressure sensor is a first pressure value, and the pressure value at the air inlet sensed by the pressure sensor is a second pressure value. During the working process, the first pressure value and the second pressure value are first obtained, and the absolute value of the difference between the first pressure value and the second pressure value is calculated, and then the absolute value of the calculated difference is compared with the pre-stored first threshold value and the second threshold value: when the absolute value of the calculated difference is greater than the first threshold value, it reflects that the current operating frequency of the electric fan exceeds the current exhaust demand, thereby generating a third control instruction to reduce the operating frequency of the electric fan, so as to adjust the operating frequency of the electric fan to a reasonable operating frequency through the third control instruction; accordingly, when the absolute value of the calculated difference is less than the second threshold value, it reflects that the current operating frequency of the electric fan exceeds the current exhaust demand, thereby generating a third control instruction to reduce the operating frequency of the electric fan, so as to adjust the operating frequency of the electric fan to a reasonable operating frequency through the third control instruction. Thus, on the one hand, energy waste, unnecessary noise and negative pressure caused by excessive power are avoided; on the other hand, the problem of incomplete exhaust caused by insufficient power is avoided. This can optimize the exhaust device control method, improve control accuracy and reliability, reduce energy loss and negative pressure, and enhance user experience.

[0100] like Fig. 9 As shown, an embodiment of the third aspect of the present invention provides an exhaust device control system 700, and the exhaust device control system 700 includes: a memory 702, configured to store a computer program; a processor 704, configured to execute the computer program to implement the exhaust device control method defined in any of the above embodiments, thereby, the exhaust device control system 700 includes all the beneficial effects of the exhaust device control method provided in any of the above embodiments, which will not be repeated here.

[0101] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it implements the exhaust device control method provided in any of the above embodiments. Thus, the computer-readable storage medium includes all the beneficial effects of the exhaust device control method provided in any of the above embodiments, which will not be repeated here.

[0102] In a specific embodiment of the present invention, in the exhaust device 1, each electric air valve 5 is provided with an electric opening and closing device, and the electric air valve 5 is opened to a suitable angle according to the ignition signal of the cooking device 9 (induction cooker or electric oven), and the required working frequency of the electric fan is comprehensively calculated according to the number of dining tables used, their positions in the exhaust passage 3, and the shape of the exhaust passage 3, and the working state of the inverter is adjusted at any time. Thus, the motor works in a small load mode during the off-peak period, the power consumption is reduced, and the purpose of energy saving is achieved; similarly, during the off-peak period, the unused electric air valve 5 is not opened and no air is exhausted, and the environmental noise is greatly reduced; the reduction in the exhaust volume naturally reduces the negative pressure phenomenon.

[0103] On the basis of the original exhaust device 1, the present invention adds three parts: an electric air valve 5, a control box 70 and a control host 72. The electric air valve 5 is used to open and close the air inlet 32. The control box 70 is used to collect ignition signals and control the opening of the electric air valve 5, and transmit the collected signals and working status to the control host 72. The control host 72 integrates the signals and working status of each control box 70, obtains the required frequency of the frequency conversion controller 7 through an algorithm, and adjusts the power of the electric fan. The communication between the control box 70 and the control host is networked in a wireless or wired manner.

[0104] In another specific embodiment of the present invention, specific limitations are made on the pressure sensor. The pressure sensor includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged inside the exhaust channel 3 (not the air outlet 34) to measure the air pressure value inside the exhaust channel 3, and the second pressure sensor is arranged at the air inlet 32 ​​to measure the pressure value at the air inlet 32, wherein the first pressure sensor and the second pressure sensor are both connected to the control box 70. During operation, the controller 7 analyzes whether the current operating frequency of the electric fan meets the requirements based on the first pressure value and the second pressure value. After analyzing that the current operating frequency of the electric fan does not meet the requirements, the operating frequency of the electric fan is adjusted accordingly according to the result. Thereby achieving the technical effect of optimizing the structure of the exhaust device 1, improving the automation and intelligence of the electric fan, and improving the user experience.

[0105] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, two connection modes between the control box 70 and the control host 72 are defined.

[0106] The first connection mode: a transmission line 74 is provided in the controller 7, one end of the transmission line 74 is connected to the control box 70, and the other end is connected to the control host 72. During operation, the transmission line 74 transmits the working information of the electric air valve 5 received by the control box 70 and the air pressure value sensed by the pressure sensor to the control host 72, and the control host 72 controls the operation of the electric fan according to the working information of the electric air valve 5 and the exhaust channel 3 information pre-stored inside, or the control host 72 controls the operation of the electric fan according to the air pressure value sensed by the pressure sensor, so as to ensure that the working frequency of the electric fan matches the exhaust demand of the exhaust device 1.

[0107] The second connection method: Figure 4 As shown, the control box 70 is provided with a wireless transmitter 704, and the control host 72 is correspondingly provided with a wireless receiver 722 matching the wireless transmitter 704. During operation, the control box 70 transmits the working information of the electric air valve 5 received by the control box 70 and the air pressure value sensed by the pressure sensor to the wireless receiver 722 on the control host 72 through the wireless transmitter 704, so that the control host 72 receives it. The control host 72 controls the operation of the electric fan according to the working information of the electric air valve 5 and the exhaust channel 3 information pre-stored inside, or the control host 72 controls the operation of the electric fan according to the air pressure value sensed by the pressure sensor, so as to ensure that the working frequency of the electric fan matches the exhaust demand of the exhaust device 1. By connecting the control box 70 and the control host 72 by wireless connection, on the one hand, the assembly difficulty of the control box 70 and the control host 72 is reduced, so that the control box 70 and the control host 72 are not affected by other exhaust device 1 structures during the assembly process; on the other hand, the connection stability and reliability of the control box 70 and the control host 72 are improved. This achieves the technical effect of optimizing the structure of the controller 7 and the connection method of the controller 7, reducing the difficulty of assembling the controller 7, and improving the working stability and reliability of the controller 7.

[0108] Furthermore, the electric fan includes a housing, a motor and a frequency converter. The housing is a positioning connection structure of the electric fan, which is used to position and connect the electric fan to the air outlet 34. The motor is a driving structure of the electric fan, and a wind wheel is connected to the output end of the motor. During operation, the motor drives the wind wheel to rotate to extract the gas inside the exhaust channel 3. The frequency converter is connected to the motor, and the control host 72 can change the working frequency of the motor by controlling the operation of the frequency converter.

[0109] Furthermore, the electric air valve 5 is detachably connected to the air duct channel, and the electric fan is detachably connected to the air outlet 34. By limiting the electric air valve 5 and the electric fan to be detachably connected to the exhaust channel 3, on the one hand, the difficulty of assembling and transporting the exhaust device 1 is reduced, and on the other hand, when the electric fan and the electric air valve 5 fail, the user can directly replace or maintain the equipment by disassembling the electric fan and the electric air valve 5. This achieves the technical effect of optimizing the structure of the exhaust device 1, reducing the difficulty of assembling and maintaining the exhaust device 1, and improving the user experience.

[0110] In a specific embodiment of the present invention, two exhaust devices 1 are provided:

[0111] like Figure 1 As shown, in the first exhaust device 1, the exhaust duct 3 is annular and is arranged below the floor of the restaurant. The fumes or steam generated by the cooking equipment 9 on each dining table enter the annular exhaust duct 3 from the air inlet 32 ​​opened on the dining table and are uniformly discharged from the air outlet 34.

[0112] like Figure 2 As shown, in the second exhaust device 1, the exhaust channel 3 is linear, and a plurality of branches are arranged on the linear exhaust channel 3. An air inlet 32 ​​is opened at the end of the branch. The fumes and steam generated by the cooking equipment 9 on each dining table enter the exhaust channel 3 through the air inlet 32, and are collected in the exhaust channel and then discharged from the air outlet 34.

[0113] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship described in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0114] In the description of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for controlling an exhaust device, characterized in that: The exhaust device comprises: An exhaust passage, wherein the exhaust passage is provided with an air inlet and an air outlet; An electric air valve is arranged on the exhaust passage, and is used to open or close the air inlet; An electric fan connected to the air outlet, the electric fan extracts gas in the exhaust passage; a controller connected to the electric air valve and the electric fan, the controller controlling the electric air valve to adjust the opening, and the controller calculating the target operating frequency of the electric fan according to the number of openings of the electric air valve, the relative position of the opened electric air valve in the exhaust passage, and the shape of the air passage, and the controller controlling the operating frequency of the electric fan according to the target operating frequency; The air inlet is configured to be arranged opposite to the cooking device, and the controller includes: A control box connected to the electric air valve; a current sensor, disposed on the control box, the current sensor being configured to be suitable for connection with the cooking device; Wherein, the control box controls the electric air valve to adjust the opening according to the ignition signal collected by the current sensor; The exhaust device control method comprises: Obtaining an ignition signal from a cooking device; generating a first control instruction according to the ignition signal; Controlling the operation of the electric air valve by means of the first control instruction; generating a second control instruction according to the ignition signal and pre-stored air duct information; Controlling the operation of the electric fan according to the second control instruction; The step of generating a second control instruction according to the ignition signal and the pre-stored air duct information specifically includes: Determining the working information of the electric air valve according to the ignition signal; Generating current exhaust channel information according to the electric air valve working information and the pre-stored exhaust channel information; Generate a second control instruction according to the electric air valve working information and the current exhaust channel information; Acquire a first pressure value and a second pressure value; the first pressure value is the pressure value inside the exhaust passage, and the second pressure value is the pressure value at the air inlet; calculating an absolute value of a difference between the first pressure value and the second pressure value; generating a third control instruction for reducing the operating frequency of the electric blower based on the absolute value of the difference being greater than a first threshold; Based on the absolute value of the difference being less than a second threshold, generating a third control instruction for increasing the operating frequency of the electric fan; Controlling the operation of the electric fan according to the third control instruction; The first threshold is greater than the second threshold.

2. The exhaust device control method according to claim 1, characterized in that: The exhaust device also includes: A pressure sensor is arranged on the exhaust passage and connected to the control box. The controller controls the operation of the electric fan according to the pressure value sensed by the pressure sensor.

3. The exhaust device control method according to claim 1 or 2, characterized in that: The controller further comprises: A control host is connected to the control box and the electric fan respectively, and the control host controls the working frequency of the electric fan according to the information in the control box.

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