Smoke exhaust control device, system and method

Abstract

The present invention provides a smoke exhaust control device, system and method, wherein the second control module is used to send reporting information to the first communication module through the second communication module; the first control module is used to adjust the operating state of the fan through the first drive module according to the reporting information; wherein the reporting information includes: indication information of whether the power of the first drive module is sufficient. The second control module in the device can form reporting information based on the pressure state in the smoke exhaust branch pipe, and the first control module adjusts the operating state of the fan according to the reporting information. This constant wind pressure control method can simplify the control process, reduce the control cost, and improve the accuracy of kitchen smoke exhaust control.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen smoke exhaust, and in particular to a smoke exhaust control device, system and method. Background Art

[0002] In the related art, when controlling kitchen smoke exhaust, the branch pipe flow is generally controlled by the fan speed and the valve opening and closing angle to keep it within a certain range. In this constant flow control emission method, when the air volume needs to be obtained, the following two methods are usually used. One method is to use a hot wire or a Pitot tube to read the wind speed and then directly convert it into air volume. The other method is to use the resistance increase method to read the pressure difference and indirectly convert it into air volume. However, the first method has the risk of the sensor being easily blocked by the oil smoke particles in the branch pipe and failing. The second method increases the branch pipe resistance, causing loss and waste of power resources, and the components are complicated, resulting in increased costs. Summary of the invention

[0003] The object of the present invention is to provide a smoke exhaust control device, system and method to improve the accuracy of kitchen smoke exhaust control.

[0004] A smoke exhaust control device provided by the present invention includes: a main unit, and electric valves corresponding to multiple terminals respectively; wherein the main unit includes a fan, a first drive module, a first control module and a first communication module; each of the electric valves includes a second control module and a second communication module; the first communication module and the first drive module are respectively communicated and connected with the first control module; the first drive module is communicated and connected with the fan; the first communication module and the second control module are respectively communicated and connected with the second communication module; the second control module is used to send reporting information to the first communication module through the second communication module; the first control module is used to adjust the operating status of the fan through the first drive module according to the reporting information; wherein the reporting information includes: indication information on whether the power of the first drive module is sufficient.

[0005] Furthermore, for a designated electric valve among multiple electric valves, the designated electric valve also includes: an acquisition module, which is communicatively connected to the second control module in the designated electric valve; the second control module is also used to: obtain the usage status of the designated terminal corresponding to the designated electric valve through the acquisition module.

[0006] Furthermore, the designated electric valve also includes: a wind pressure collection module, which is communicatively connected to the second control module in the designated electric valve; the second control module is also used for: if the usage status of the designated terminal is in use, obtaining the smoke exhaust branch pipe wind pressure value corresponding to the designated terminal through the wind pressure collection module.

[0007] Furthermore, the designated electric valve also includes: a second driving module, which is communicatively connected to the second control module in the designated electric valve; the second control module is also used to: obtain a preset wind pressure value through the second communication module, and adjust the valve opening angle of the designated electric valve through the second driving module according to the smoke exhaust branch pipe wind pressure value and the preset wind pressure value.

[0008] Furthermore, the second control module is also used to: determine whether the wind pressure value of the smoke exhaust branch pipe is greater than a first threshold value; wherein the first threshold value is the sum of the preset wind pressure value and a first deviation value; if the wind pressure value of the smoke exhaust branch pipe is not greater than the first threshold value, determine whether the wind pressure value of the smoke exhaust branch pipe is less than a second threshold value; wherein the second threshold value is the sum of the preset wind pressure value and a second deviation value, and the first deviation value is greater than the second deviation value; if the wind pressure value of the smoke exhaust branch pipe is less than the second threshold value, reduce the opening angle of the valve plate; if the wind pressure value of the smoke exhaust branch pipe is between the first threshold value and the second threshold value, maintain the current opening angle of the valve plate.

[0009] Furthermore, the second control module is also used to: if the wind pressure value of the smoke exhaust branch pipe is greater than the first threshold value, determine whether the opening angle of the valve plate reaches a preset maximum opening angle; if the opening angle of the valve plate does not reach the preset maximum opening angle, adjust the opening angle of the valve plate; if the opening angle of the valve plate reaches the preset maximum opening angle, send reporting information to the first communication module through the second communication module, and the reporting information includes: indication information of insufficient power of the first driving module.

[0010] Furthermore, the first control module is also used to: determine whether the reported information includes indication information of insufficient power of the first drive module; if the reported information contains indication information of insufficient power of the first drive module, determine whether the first drive module is in a started state; if the first drive module is not in a started state, start the first drive module and control the operating frequency of the first drive module to be a starting frequency; if the first drive module is in a started state, determine whether the operating frequency of the first drive module reaches a preset maximum frequency; if the operating frequency of the first drive module does not reach the preset maximum frequency, increase the preset frequency value, and continue to execute the step of determining whether the reported information contains indication information of insufficient power of the first drive module, so as to adjust the operating state of the fan through the first drive module; if the operating frequency of the first drive module reaches the preset maximum frequency, adjust the preset wind pressure value, and send the adjusted preset wind pressure value to the second communication module; continue to execute the step of determining whether the wind pressure value of the smoke exhaust branch pipe is greater than the first threshold value, so as to adjust the operating state of the fan through the first drive module.

[0011] Furthermore, the first control module is also used for: if the reported information does not contain the indication information of insufficient power of the first drive module, judging whether the preset wind pressure value is the initial preset wind pressure value; if the preset wind pressure value is the initial preset wind pressure value, judging whether the operating frequency of the first drive module reaches the starting frequency; if the operating frequency of the first drive module reaches the starting frequency and the indication information of insufficient power of the first drive module is not received within the preset time, shutting down the first drive module; if the operating frequency of the first drive module does not reach the starting frequency, adjusting the operating frequency of the first drive module, and continuing to execute the step of judging whether the reported information contains the indication information of insufficient power of the first drive module, so as to adjust the operating state of the fan through the first drive module; if the preset wind pressure value is not the initial preset wind pressure value, adjusting the preset wind pressure value, and sending the adjusted preset wind pressure value to the second communication module.

[0012] Furthermore, the device also includes: smoke exhaust branch pipes and fire dampers corresponding to the multiple terminals respectively; each of the smoke exhaust branch pipes is connected to the corresponding terminal, and is used to provide a smoke exhaust channel for the terminal corresponding to the smoke exhaust branch pipe; the electric valve and the fire damper are arranged in the smoke exhaust branch pipe.

[0013] Furthermore, the electric valve and the fire damper are an integrated structure.

[0014] Furthermore, the electric valve is arranged between the terminal and the fire damper.

[0015] Furthermore, the terminal includes: a range hood with a drive motor, or a fume hood without a drive motor.

[0016] A smoke exhaust control system provided by the present invention comprises a common smoke duct and any of the above-mentioned smoke exhaust control devices, wherein the main unit in the smoke exhaust control device is connected to the common smoke duct; each terminal in the smoke exhaust control device is connected to the common smoke duct through the smoke exhaust branch pipe corresponding to the terminal.

[0017] The present invention provides a smoke exhaust control method, which includes: a second control module sends reporting information to a first communication module through a second communication module; wherein the reporting information includes: indication information on whether the power of the first drive module is sufficient; and the first control module adjusts the operating state of the fan through the first drive module according to the reporting information.

[0018] The smoke exhaust control device, system and method provided by the present invention include a host and electric valves corresponding to multiple terminals; wherein the host includes a fan, a first drive module, a first control module and a first communication module; each electric valve includes a second control module and a second communication module; the first communication module and the first drive module are respectively connected to the first control module for communication; the first drive module is connected to the fan for communication; the first communication module and the second control module are respectively connected to the second communication module for communication; the second control module is used to send reporting information to the first communication module through the second communication module; the first control module is used to adjust the operating state of the fan through the first drive module according to the reporting information; wherein the reporting information includes: indication information of whether the power of the first drive module is sufficient. The second control module in the device can form reporting information based on the pressure state in the smoke exhaust branch pipe, and the first control module adjusts the operating state of the fan according to the reporting information. This constant wind pressure control method can simplify the control process, reduce the control cost, and improve the accuracy of kitchen smoke exhaust control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a smoke exhaust control device provided by an embodiment of the present invention;

[0021] Figure 2A schematic diagram of the connection relationship of a smoke exhaust control device provided by an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the connection relationship of another smoke exhaust control device provided by an embodiment of the present invention;

[0023] Figure 4 A control logic diagram of a smoke exhaust control device provided by an embodiment of the present invention;

[0024] Figure 5 A control logic diagram of another smoke exhaust control device provided by an embodiment of the present invention;

[0025] Figure 6 A flow chart of a smoke exhaust control method provided by an embodiment of the present invention.

[0026] Icons: 10-host; 11-fan; 12-first drive module; 13-first control module; 14-first communication module; 20-terminal; 30-electric valve; 31-second control module; 32-second communication module; 33-acquisition module; 34-wind pressure acquisition module; 35-second drive module; 40-fire damper; 50-smoke exhaust branch pipe; 60-public flue. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the related art, when controlling kitchen smoke exhaust, a constant flow control emission method is usually adopted. The branch pipe flow is monitored by the flow monitoring module of the fan, and the branch pipe flow is controlled by the fan speed and the valve opening and closing angle. This control method based on constant flow is not easy to implement because it needs to read the wind speed; the general implementation method can use a hot wire or a pitot tube to read the wind speed and then directly convert it into air volume; or the resistance increase method can be used to read the pressure difference and indirectly convert it into air volume, but the former has the risk of the sensor being easily blocked by the oil smoke particles in the branch pipe and failing; the latter increases the resistance of the branch pipe, causing power resource loss and waste, and the components are complex and increase costs.

[0029] Based on this, the embodiments of the present invention provide a smoke exhaust control device, system and method. The technology can be applied to kitchen smoke exhaust control applications in high-rise residential buildings.

[0030] To facilitate understanding of this embodiment, a smoke exhaust control device disclosed in an embodiment of the present invention is first described in detail; Figure 1As shown, the device includes: a host 10, and a plurality of terminals 20 respectively corresponding to the electric valve 30; wherein the host 10 includes a fan 11, a first drive module 12 ( Figure 1 Not shown), the first control module 13 ( Figure 1 Not shown) and the first communication module 14 ( Figure 1 Each electric valve 30 includes a second control module 31 ( Figure 1 not shown) and a second communication module 32 ( Figure 1 not shown).

[0031] In actual implementation, the host 10 can usually be installed on the roof of a high-rise residential building, close to a public flue; the terminal 20 can be a range hood with a drive motor, or a smoke hood without a drive motor; a terminal 20 is usually installed on each floor of a high-rise residential building, and each terminal 20 has an electric valve 30 corresponding to the terminal 20; the first drive module 12 can be a drive motor; the first control module 13 and the second control module 31 can both be in the form of control chips.

[0032] The first communication module 14 and the first drive module 12 are respectively connected to the first control module 13 for communication; the first drive module 12 is connected to the fan 11 for communication; the first communication module 14 and the second control module 31 are respectively connected to the second communication module 32 for communication; the second control module 31 is used to send reporting information to the first communication module 14 through the second communication module 32; the first control module 13 is used to adjust the operating state of the fan 11 through the first drive module 12 according to the reporting information; wherein the reporting information includes: indication information on whether the power of the first drive module 12 is sufficient.

[0033] In actual implementation, the first communication module 14 can receive the corresponding reporting information sent by the second communication module 32 in the electric valve 30 corresponding to any terminal 20, and the reporting information generally includes insufficient power information of the first drive module 12, or includes sufficient power information of the first drive module 12; see Figure 2 A connection relationship diagram of a smoke exhaust control device is shown, in which the first communication module 14 sends the received reporting information to the first control module 13, and the first control module 13 adjusts the first driving module 12 according to the reporting information, so as to drive the fan 11 through the first driving module 12 and adjust the operating speed or frequency of the fan 11.

[0034] The embodiment of the present invention provides a smoke exhaust control device, including a host, and electric valves corresponding to multiple terminals respectively; wherein the host includes a fan, a first drive module, a first control module and a first communication module; each electric valve includes a second control module and a second communication module; the first communication module and the first drive module are respectively connected to the first control module for communication; the first drive module is connected to the fan for communication; the first communication module and the second control module are respectively connected to the second communication module for communication; the second control module is used to send reporting information to the first communication module through the second communication module; the first control module is used to adjust the operating state of the fan through the first drive module according to the reporting information; wherein the reporting information includes: indication information of whether the power of the first drive module is sufficient. The second control module in the device can form reporting information based on the pressure state in the smoke exhaust branch pipe, and the first control module adjusts the operating state of the fan according to the reporting information. This constant wind pressure control method can simplify the control process, reduce the control cost, and improve the accuracy of kitchen smoke exhaust control.

[0035] Furthermore, for a specified electric valve among multiple electric valves, the specified electric valve also includes: an acquisition module 33, which is communicatively connected to the second control module 31 in the specified electric valve; the second control module 31 is also used to: obtain the usage status of the specified terminal corresponding to the specified electric valve through the acquisition module 33.

[0036] In actual implementation, each electric valve 30 generally further includes an acquisition module 33, and each acquisition module 33 is in communication connection with the second control module 31 in the corresponding electric valve; see Figure 3 As shown in the connection relationship diagram of another smoke exhaust control device, the acquisition module 33 can also be understood as a terminal startup detection module, through which it can be determined whether the terminal corresponding to the acquisition module 33 is in use. The acquisition module 33 sends the acquired information related to the use status of the terminal to the corresponding second control module 31.

[0037] Furthermore, the designated electric valve also includes: a wind pressure collection module 34, which is communicated with the second control module 31 in the designated electric valve; the second control module 31 is also used for: if the use status of the designated terminal is in use, obtaining the smoke exhaust branch pipe wind pressure value corresponding to the designated terminal through the wind pressure collection module 34.

[0038] In actual implementation, each electric valve generally includes a wind pressure collection module 34, such as Figure 3As shown, each wind pressure collection module 34 is communicatively connected with the second control module 31 in the corresponding electric valve; the wind pressure collection module 34 can be a wind pressure sensor. If the corresponding terminal is in use, the wind pressure value of the smoke exhaust branch pipe connected to the terminal can be obtained through the wind pressure collection module 34, and the wind pressure collection module 34 sends the obtained smoke exhaust branch pipe wind pressure value to the corresponding second control module 31.

[0039] Furthermore, the designated electric valve also includes: a second drive module 35, which is communicatively connected to the second control module 31 in the designated electric valve; the second control module 31 is also used to: obtain a preset wind pressure value through the second communication module 32, and adjust the valve plate opening angle of the designated electric valve through the second drive module 35 according to the wind pressure value of the smoke exhaust branch pipe and the preset wind pressure value.

[0040] The preset wind pressure value can be set based on the specific terminal according to actual needs. Usually, if the terminal is a range hood with a drive motor, the preset wind pressure value is usually set to a positive wind pressure value. If the terminal is a smoke hood without a drive motor, the preset wind pressure value is usually set to a negative wind pressure value. In actual implementation, each electric valve usually also includes a second drive module 35, such as Figure 3 As shown, each second drive module 35 is communicatively connected with the second control module 31 in the corresponding electric valve. The second drive module 35 can also be a drive motor. The second control module 31 obtains the preset wind pressure value through the second communication module 32, and then adjusts the second drive module 35 according to the corresponding smoke exhaust branch pipe wind pressure value and the preset wind pressure value, so as to adjust the valve opening and closing angle in the corresponding electric valve through the second drive module 35.

[0041] Furthermore, the second control module 31 is also used to: determine whether the wind pressure value of the smoke exhaust branch pipe is greater than a first threshold value; wherein the first threshold value is the sum of a preset wind pressure value and a first deviation value; if the wind pressure value of the smoke exhaust branch pipe is not greater than the first threshold value, determine whether the wind pressure value of the smoke exhaust branch pipe is less than a second threshold value; wherein the second threshold value is the sum of a preset wind pressure value and a second deviation value, and the first deviation value is greater than the second deviation value; if the wind pressure value of the smoke exhaust branch pipe is less than the second threshold value, reduce the opening angle of the valve plate; if the wind pressure value of the smoke exhaust branch pipe is between the first threshold value and the second threshold value, maintain the current opening angle of the valve plate.

[0042] For the convenience of explanation, the wind pressure value of the smoke exhaust branch pipe is represented by P1, the preset wind pressure value is represented by P0, the first deviation value is +σ, and the second deviation value is -σ, where σ is a positive value. For example, the first threshold value is P0+σ, and the second threshold value is P0-σ. In actual implementation, if the terminal is in use, the valve plate of the corresponding electric valve is opened, and the corresponding second control module begins to monitor the corresponding smoke exhaust branch pipe wind pressure value P1 and the preset wind pressure value P0, and continuously adjusts the opening state of the valve plate within a fixed period. If the second control module determines that P1<P0+σ, it will usually continue to determine whether P1 is less than the above P0-σ; if P1<P0-σ, the opening angle of the valve plate of the corresponding electric valve will usually be reduced. In the process of reducing the valve plate opening angle, it is usually determined in real time whether the wind pressure of the smoke exhaust branch pipe is less than the preset wind pressure value; if P0-σ≤P1≤P0+σ, the existing valve plate opening angle is maintained.

[0043] Furthermore, the second control module 31 is also used to: if the wind pressure value of the smoke exhaust branch pipe is greater than the first threshold value, determine whether the opening angle of the valve plate reaches the preset maximum opening angle; if the opening angle of the valve plate does not reach the preset maximum opening angle, adjust the opening angle of the valve plate; if the opening angle of the valve plate reaches the preset maximum opening angle, send a reporting information to the first communication module through the second communication module, and the reporting information includes: indication information of insufficient power of the first drive module.

[0044] If the second control module determines that P1>P0+σ, it usually continues to determine whether the opening angle of the valve plate of the corresponding electric valve has been adjusted to the maximum opening angle. If the valve plate opening angle is not opened to the maximum, the valve plate opening angle can be increased. For example, it can be increased by 3 degrees or 5 degrees each time. It can be set specifically according to actual needs. In the process of increasing the valve plate opening angle, it is usually determined in real time whether the wind pressure value of the smoke exhaust branch pipe is greater than the preset wind pressure value; if the valve plate opening angle has been opened to the maximum, a signal of insufficient power of the first drive module in the host is sent to the first communication module through the second communication module.

[0045] Furthermore, the first control module 13 is also used to: determine whether the reported information includes indication information of insufficient power of the first drive module 12; if the reported information contains indication information of insufficient power of the first drive module 12, determine whether the first drive module 12 is in the startup state; if the first drive module 12 is not in the startup state, start the first drive module 12 and control the operating frequency of the first drive module 12 to the starting frequency; if the first drive module 12 is in the startup state, determine whether the operating frequency of the first drive module 12 reaches the preset maximum frequency; if the operating frequency of the first drive module 12 does not reach the preset maximum frequency, increase the preset frequency value, and continue to execute the step of determining whether the reported information contains indication information of insufficient power of the first drive module, so as to adjust the operating state of the fan through the first drive module; if the operating frequency of the first drive module 12 reaches the preset maximum frequency, adjust the preset wind pressure value, and send the adjusted preset wind pressure value to the second communication module 32; continue to execute the step of determining whether the wind pressure value of the smoke exhaust branch pipe is greater than the first threshold value, so as to adjust the operating state of the fan through the first drive module.

[0046] In actual implementation, the rooftop host obtains the reported information of each unit user in real time through the first communication module. If there is an indication signal of insufficient power of the first drive module in the obtained reported information, the following operations are performed: determine whether the first drive module is started. If not, start the first drive module and run it to the starting frequency, such as 30Hz; if the first drive module is started, determine whether the operating frequency of the first drive module is adjusted to the maximum. If not, increase a certain frequency value, such as 2Hz, and run stably for a preset time, such as 1 minute, and then continue to adjust according to the reported information; if the operating frequency of the first drive module has been adjusted to the maximum, the first control module adjusts the preset pressure value P0, increases a certain pressure value, such as 50Pa, and sends the adjusted new preset wind pressure to the second communication module corresponding to the terminal of each unit user, so that each second communication module receives it, runs stably for a preset time, such as 1 minute, and then continues to adjust according to the reported information.

[0047] Further, the first control module 13 is also used to: if the reporting information does not include the indication information of insufficient power of the first drive module, determine whether the preset wind pressure value is the initial preset wind pressure value; if the preset wind pressure value is the initial preset wind pressure value, determine whether the operating frequency of the first drive module reaches the starting frequency; if the operating frequency of the first drive module reaches the starting frequency, and the indication information of insufficient power of the first drive module is not received within the preset time, close the first drive module; if the operating frequency of the first drive module does not reach the starting frequency, adjust the operating frequency of the first drive module, and continue to perform the step of judging whether the reporting information contains insufficient power of the first drive module, to adjust the operating status of the fan through the first drive module; if the preset wind pressure value is not the initial preset wind pressure value, adjust the preset wind pressure value, and send the adjusted preset wind pressure value to the second communication module.

[0048] In actual implementation, if there is no indication of insufficient power of the first drive module in the acquired reporting information, the following operation is performed: determine whether the preset pressure value P0 is equal to the default value, which is equivalent to the above-mentioned initial preset wind pressure value. If not, adjust the preset pressure value P0 to reduce a certain pressure value, such as 50Pa, and send it to the second communication module corresponding to the terminal of each unit household, so that each second communication module can be received, and run the preset time stably. For example, after 1 minute, the adjustment will continue to be made according to the reported information.

[0049] If the preset pressure value P0 is equal to the default value, it is determined whether the operating frequency of the first driving module is equal to the starting frequency, such as 30Hz, and if it is not equal, a certain frequency value is reduced, such as 2Hz, and the preset operation time is stable. If 1 minute later, then the adjustment will continue based on the reported information. If the operating frequency of the first driving module is equal to the starting frequency, such as 30 Hz, and if the indication information about the insufficient power of the first driving module is not received within three minutes within a preset time, the first driving module is turned off.

[0050] For ease of understanding, the following is provided Figure 4 A control logic diagram of a smoke exhaust control device is shown, wherein: Figure 4The content of the dotted box in the middle is the control logic diagram of the electric valve of each household unit. Taking the terminal as a range hood as an example, the acquisition module in the electric valve monitors and identifies the use status of the range hood in real time, and determines whether the range hood is in use. If the range hood is not in use, the valve plate of the electric valve is completely closed; if the range hood is in use, the valve plate of the electric valve is opened, and its control board (corresponding to the above-mentioned second control module) starts to monitor the exhaust branch pipe wind pressure value P1 and the preset wind pressure value P0, and continuously adjusts the valve plate opening state as follows within a fixed period: The control board of the electric valve obtains the exhaust branch pipe wind pressure value P1 through the wind pressure sensor (corresponding to the above-mentioned wind pressure acquisition module), and obtains the current preset wind pressure value P0 through the communication module (corresponding to the above-mentioned second communication module); if If the smoke exhaust branch pipe wind pressure value P1 is not greater than the preset pressure P0+σ (corresponding to the above-mentioned first threshold), determine whether the smoke exhaust branch pipe wind pressure value P1 is less than the preset pressure P0-σ (corresponding to the above-mentioned second threshold). If the smoke exhaust branch pipe wind pressure value P1 is less than the preset pressure P0-σ, reduce the valve opening angle; if the smoke exhaust branch pipe wind pressure value P1 is greater than the preset pressure P0+σ, determine whether the valve opening angle is adjusted to the maximum. If the valve opening angle is not adjusted to the maximum, increase the valve opening angle. If the valve opening angle has been adjusted to the maximum, report the system power shortage signal (corresponding to the above-mentioned sending of reporting information to the first communication module through the second communication module, the reporting information includes: the indication information of the power shortage of the first drive module). If P0-σ≤P1≤P0+σ, maintain the existing valve opening angle, where -σ~+σ is the allowable pressure deviation value.

[0051] Figure 4 The content of the non-dashed box is the control logic diagram of the rooftop host. The rooftop host obtains the reported information in real time through the first communication module, which can also be understood as obtaining the reported information corresponding to each unit user in real time. If there is a power shortage signal in the obtained reported information, the following operations are performed: determine whether the host is started (corresponding to the above-mentioned determination of whether the first drive module is in the started state), if the host is not started, start the host (corresponding to the above-mentioned start of the first drive module), and run to the starting frequency, such as 30Hz, if the host is started, determine whether the host operating frequency is adjusted to the maximum, such as 50Hz, if not adjusted to the maximum, increase the operating frequency, such as increasing 2Hz, stabilize the preset time, such as 1 minute, and then adjust according to the reported information; if the host operating frequency is adjusted to the maximum, increase the preset pressure value P0 and send it down, such as increasing 50Pa, so that each unit user can receive it, stabilize the preset time, such as 1 minute, and then adjust according to the reported information.

[0052] If there is no insufficient power signal in the reported information obtained, perform the following operations: determine whether the current preset pressure value P0 is equal to the default value (corresponding to the above-mentioned initial preset wind pressure value); if not, reduce the preset pressure value P0 and send it down, such as reducing it by 50Pa, so that each unit can receive it and stabilize it for a preset time, such as 1 minute, and then make adjustments based on the reported information.

[0053] If the current preset pressure value P0 is equal to the default value, determine whether the host operating frequency is reduced to the starting frequency. If not, reduce the operating frequency, such as by 2Hz, stabilize the running for a preset time, such as 1 minute, and then adjust according to the reported information; if the host operating frequency is reduced to the starting frequency, and no power shortage signal is received within the preset time, such as whether no host power shortage signal is received within three minutes, if so, the host stops running (corresponding to the above-mentioned shutdown of the first drive module); it should be noted that the above-mentioned specific numerical values ​​are only used to indicate the size relationship and preferred values ​​for the sake of understanding. In actual applications, they can be replaced according to actual needs.

[0054] The above-mentioned smoke exhaust control device collects the actual wind pressure value of the smoke exhaust branch pipe and compares it with the preset wind pressure value, and adjusts the host frequency. If the maximum or minimum host frequency is reached, the preset pressure value can also be adjusted. There is no need for complex control methods, and there is no need to identify the user's usage status and quantity. The host frequency cooperates with communication to complete automatic adjustment, which simplifies the control process.

[0055] As an alternative, the exhaust branch pipe air pressure control method can also be achieved by controlling the speed of the terminal range hood. Figure 5 Another control logic diagram of the smoke exhaust control device shown in FIG. Figure 4 The control logic diagram in the dashed box is replaced by speed regulation. Figure 4 In the dotted box, the control of the valve opening angle is replaced by Figure 5 The control of the operating angle of the range hood impeller can be referred to the above embodiment for control details, which will not be repeated here. The problem with this implementation is that since the range hood is not installed as a whole with the building, it is easy to be replaced by later users, thereby destroying the wind pressure control ability of the current floor. When the range hood is replaced by the user, the operation of other floors will not be affected. The possible consequence is that the actual operating frequency of the host will increase compared to before.

[0056] Further, such as Figure 1 As shown, the device also includes: smoke exhaust branch pipes 50 and fire dampers 40 corresponding to multiple terminal machines respectively; each smoke exhaust branch pipe 50 is connected to the corresponding terminal machine 20, and is used to provide a smoke exhaust channel for the terminal machine 20 corresponding to the smoke exhaust branch pipe 50; the electric valve 30 and the fire damper 40 are arranged in the smoke exhaust branch pipe 50.

[0057] In actual implementation, in a high-rise residential building, the terminal 20 installed on each floor is usually provided with a smoke exhaust branch pipe 50 corresponding to the terminal 20, and the air outlet position of the terminal 20 is connected to the corresponding smoke exhaust branch pipe 50; in addition, a corresponding fire damper 40 is usually provided for each terminal 20, and the electric valve and fire damper 40 corresponding to the terminal 20 are usually arranged in the corresponding smoke exhaust branch pipe 50.

[0058] Furthermore, the electric valve 30 and the fire damper 40 are an integrated structure. In actual implementation, the electric valve 30 and the fire damper 40 corresponding to each terminal 20 can be set as an integrated structure, and the integrated structure can also be called an electric fire damper. By combining the traditional electric valve and the fire damper into one, system components can be saved and the system structure can be simplified. In addition, the electric fire damper has both angle adjustment and fire prevention functions.

[0059] Furthermore, the electric valve 30 is arranged between the terminal 20 and the fire damper 40. In actual implementation, the electric valve 30 and the fire damper 40 may be designed separately, and the position of the electric valve may be flexibly set according to actual needs. For example, the electric valve 30 may be freely installed at any position between the terminal 20 and the fire damper 40. Preferably, the electric valve 30 and the pressure taking position may be installed at the inlet end of the fire damper 40 or the outlet end of the terminal 20.

[0060] Furthermore, the terminal includes: a range hood with a drive motor, or a fume hood without a drive motor.

[0061] In actual implementation, the above-mentioned terminal can be an existing range hood with a drive motor in the room, or it can be an unpowered smoke hood; it can also be understood that the present technical solution can also be used in a centralized kitchen smoke exhaust system. The so-called centralized kitchen smoke exhaust system means that the indoor range hood is composed of an unpowered smoke hood, which is mainly powered by the rooftop main unit located at the flue outlet; the present technical solution can also be applied to a mixed kitchen smoke exhaust system in which there are both range hoods with drive motors and unpowered smoke hoods in the room; it should be noted that if the terminal includes an unpowered smoke hood, the preset pressure value P0 of the smoke hood is usually set to a negative pressure value, which is generally required to be less than -80Pa.

[0062] The above-mentioned smoke exhaust control device adopts a centralized smoke exhaust control method based on constant wind pressure control, which makes the working pressure of the terminals on the upper and lower floors consistent, and no longer forcibly restricts the air volume on each floor to be the same. On the one hand, the consistency of the working pressure of the terminals can also ensure that each smoke exhaust user enjoys the same smoke exhaust rights, and the smoke exhaust performance of their own terminals is not affected by the height of the floor where they live. In theory, the higher the floor, the easier the terminal is to exhaust smoke, and vice versa; on the other hand, users are more flexible in choosing terminals. Users can choose suitable terminals according to their preferences and cooking habits, without emphasizing the installation of terminals of the same model or brand on the system floor.

[0063] In addition, the present application only needs to read the pressure in the smoke exhaust branch pipe without identifying the wind speed, which is simple and reliable. Moreover, the control method is simplified, and there is no need for active reporting, complex control algorithms, or real-time monitoring of the status, which greatly reduces the information carried in the communication protocol and ensures stable system operation.

[0064] An embodiment of the present invention also provides a smoke exhaust control system, including a common smoke duct 60, and any of the above-mentioned smoke exhaust control devices, wherein the host in the smoke exhaust control device is connected to the common smoke duct 60; each terminal 20 in the smoke exhaust control device is connected to the common smoke duct 60 through the smoke exhaust branch pipe 50 corresponding to the terminal 20.

[0065] In actual implementation, the main unit in the smoke exhaust control device is usually installed on the roof of a high-rise residential building, close to the public flue 60; the terminal installed on each floor of the high-rise residential building is connected to the public flue 60 through the smoke exhaust branch pipe corresponding to the terminal, and the oil smoke exhausted by the terminal can pass through the corresponding smoke exhaust branch pipe and the public flue 60 and be discharged through the main unit.

[0066] Common usage scenarios are hybrid kitchen centralized exhaust systems, such as Figure 1 As shown, it includes a common flue 60 and a main unit 10 installed on the roof of the common flue 60. The kitchens on each floor are provided with fire dampers 40, electric valves 30, smoke exhaust branches 50 and terminals 20 connected to the common flue 60. The hybrid kitchen centralized smoke exhaust system means that the kitchen fumes are sucked in by the range hood installed indoors, pass through the smoke exhaust branches and the smoke exhaust duct, and are finally discharged by the roof fan installed at the flue outlet.

[0067] The embodiment of the present invention also provides a smoke exhaust control method, such as Figure 6 As shown, the method comprises the following steps:

[0068] Step S602, the second control module sends reporting information to the first communication module through the second communication module; wherein the reporting information includes: indication information on whether the power of the first driving module is sufficient;

[0069] Step S604: the first control module adjusts the operating state of the fan through the first driving module according to the reported information.

[0070] The embodiment of the present invention provides a smoke exhaust control method, wherein the second control module sends reporting information to the first communication module through the second communication module; the first control module adjusts the operating state of the fan through the first drive module according to the reporting information; wherein the reporting information includes: indication information of whether the power of the first drive module is sufficient. The second control module in the device can form reporting information based on the pressure state in the smoke exhaust branch pipe, and the first control module adjusts the operating state of the fan according to the reporting information. This constant wind pressure control method can simplify the control process, reduce the control cost, and improve the accuracy of kitchen smoke exhaust control.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A smoke exhaust control device, characterized in that: include: A host, and electric valves corresponding to a plurality of terminals respectively; wherein the host comprises a fan, a first drive module, a first control module and a first communication module; each of the electric valves comprises a second control module and a second communication module; The first communication module and the first drive module are respectively connected to the first control module for communication; the first drive module is connected to the fan for communication; the first communication module and the second control module are respectively connected to the second communication module for communication; The second control module is used to send reporting information to the first communication module through the second communication module; the first control module is used to adjust the operating state of the fan through the first drive module according to the reporting information; wherein the reporting information includes: indication information of whether the power of the first drive module is sufficient; the operating state includes: operating speed or frequency; For a designated electric valve among the plurality of electric valves, the designated electric valve further comprises: an acquisition module, the acquisition module being communicatively connected with the second control module in the designated electric valve; The second control module is further used to: obtain the use status of the designated terminal corresponding to the designated electric valve through the acquisition module; The designated electric valve further comprises: a wind pressure collection module, the wind pressure collection module being communicatively connected with the second control module in the designated electric valve; The second control module is further used for: if the use status of the designated terminal is in use, obtaining the wind pressure value of the smoke exhaust branch pipe corresponding to the designated terminal through the wind pressure acquisition module; The designated electric valve further includes: a second driving module, the second driving module being communicatively connected with the second control module in the designated electric valve; The second control module is also used to: obtain a preset wind pressure value through the second communication module, and adjust the valve opening angle of the designated electric valve through the second driving module according to the wind pressure value of the smoke exhaust branch pipe and the preset wind pressure value; wherein, if the designated terminal is a range hood with a drive motor, the preset wind pressure value is a positive wind pressure value; if the designated terminal is a smoke hood without the drive motor, the preset wind pressure value is a negative wind pressure value.

2. The device according to claim 1, characterized in that The second control module is also used for: Determine whether the wind pressure value of the smoke exhaust branch pipe is greater than a first threshold value; wherein the first threshold value is the sum of the preset wind pressure value and a first deviation value; If the wind pressure value of the smoke exhaust branch pipe is not greater than the first threshold, determine whether the wind pressure value of the smoke exhaust branch pipe is less than a second threshold; wherein the second threshold is the sum of the preset wind pressure value and a second deviation value, and the first deviation value is greater than the second deviation value; If the wind pressure value of the smoke exhaust branch pipe is less than the second threshold, reducing the opening angle of the valve plate; If the wind pressure value of the smoke exhaust branch pipe is between the first threshold value and the second threshold value, the current opening angle of the valve plate is maintained.

3. The device according to claim 2, characterized in that The second control module is also used for: If the wind pressure value of the smoke exhaust branch pipe is greater than the first threshold, determining whether the opening angle of the valve plate reaches a preset maximum opening angle; If the opening angle of the valve plate does not reach the preset maximum opening angle, adjusting the opening angle of the valve plate; If the opening angle of the valve plate reaches the preset maximum opening angle, a reporting information is sent to the first communication module through the second communication module, and the reporting information includes: indication information of insufficient power of the first driving module.

4. The device according to claim 3, characterized in that The first control module is also used for: Determining whether the reported information includes indication information of insufficient power of the first driving module; If the reported information includes indication information that the first driving module is underpowered, determining whether the first driving module is in a startup state; If the first driving module is in an unstarted state, starting the first driving module and controlling the operating frequency of the first driving module to be a starting frequency; If the first driving module is in the startup state, determining whether the operating frequency of the first driving module reaches a preset maximum frequency; If the operating frequency of the first driving module does not reach the preset maximum frequency, increase the preset frequency value, and continue to perform the step of determining whether the reported information contains the indication information of insufficient power of the first driving module, so as to adjust the operating state of the fan through the first driving module; If the operating frequency of the first driving module reaches the preset maximum frequency, adjust the preset wind pressure value and send the adjusted preset wind pressure value to the second communication module; continue to execute the step of determining whether the wind pressure value of the smoke exhaust branch pipe is greater than the first threshold value, so as to adjust the operating state of the fan through the first driving module.

5. The device according to claim 4, characterized in that The first control module is also used for: If the reported information does not include indication information of insufficient power of the first driving module, determining whether the preset wind pressure value is an initial preset wind pressure value; If the preset wind pressure value is the initial preset wind pressure value, determining whether the operating frequency of the first driving module reaches the starting frequency; If the operating frequency of the first driving module reaches the starting frequency and no indication information indicating insufficient power of the first driving module is received within a preset time, shutting down the first driving module; If the operating frequency of the first driving module does not reach the starting frequency, adjust the operating frequency of the first driving module, and continue to perform the step of determining whether the reported information contains indication information of insufficient power of the first driving module, so as to adjust the operating state of the fan through the first driving module; If the preset wind pressure value is not the initial preset wind pressure value, the preset wind pressure value is adjusted, and the adjusted preset wind pressure value is sent to the second communication module.

6. The device according to claim 1, characterized in that The device further comprises: smoke exhaust branches and fire dampers corresponding to the plurality of terminals respectively; Each of the smoke exhaust branch pipes is connected to the corresponding terminal, and is used to provide a smoke exhaust channel for the terminal corresponding to the smoke exhaust branch pipe; The electric valve and the fire damper are arranged in the smoke exhaust branch pipe.

7. The device according to claim 6, characterized in that The electric valve and the fire damper are an integrated structure.

8. The device according to claim 6, characterized in that The electric valve is arranged between the terminal and the fire damper.

9. The device according to claim 1, characterized in that The terminal includes: a range hood with a driving motor, or a fume hood without a driving motor.

10. A smoke exhaust control system, characterized in that: It comprises a common flue, and the smoke exhaust control device according to any one of claims 1 to 9, characterized in that: The main unit in the smoke exhaust control device is connected to the common flue; Each terminal in the smoke exhaust control device is connected to the common flue through a smoke exhaust branch pipe corresponding to the terminal.

11. A smoke exhaust control method, characterized in that: The method comprises: The second control module sends reporting information to the first communication module through the second communication module; wherein the reporting information includes: indication information on whether the power of the first driving module is sufficient; The first control module adjusts the operating state of the fan through the first driving module according to the reported information; the operating state includes: operating speed or frequency; The second control module also obtains the use status of the designated terminal corresponding to the designated electric valve through the acquisition module; The second control module is further configured to obtain the wind pressure value of the smoke exhaust branch pipe corresponding to the designated terminal through the wind pressure acquisition module if the designated terminal is in use; The second control module also obtains a preset wind pressure value through the second communication module, and adjusts the valve opening angle of the designated electric valve through the second driving module according to the wind pressure value of the smoke exhaust branch pipe and the preset wind pressure value; wherein, if the designated terminal is a range hood with a drive motor, the preset wind pressure value is a positive wind pressure value; if the designated terminal is a smoke hood without the drive motor, the preset wind pressure value is a negative wind pressure value.

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