Oil fume exhaust system and control method and control device thereof

Abstract

The present application relates to kitchen fume treatment technical field, provide a kind of oil fume exhaust system and its control method, control device, oil fume exhaust system includes air duct, fan, filter assembly, filter assembly, differential pressure detection component and cleaning assembly;Air duct is equipped with air inlet and air outlet, fan and filter assembly are set in air duct;Differential pressure detection component includes first pressure sensor for detecting the pressure of air inlet side and second pressure sensor for detecting the pressure of air outlet side, cleaning assembly includes spray head and booster pump connected to spray head, spray head is located in one side of filter assembly;Controller is electrically connected to fan, first pressure sensor, second pressure sensor and booster pump.Oil fume exhaust system determines the ventilation state of filter assembly based on the pressure of air inlet side and the pressure of air outlet side of filter assembly, and then controls cleaning assembly to spray cleaning water with detergent to filter assembly, reduces the work of manual cleaning of oil stains, improves the experience of user.

Description

Technical Field

[0001] This invention relates to the field of kitchen fume treatment technology, and in particular to a fume exhaust system and its control method and control device. Background Technology

[0002] Because Chinese cooking methods often involve frying, stir-frying, and deep-frying, these methods generate large amounts of oil fumes and heat emissions. More and more people are becoming aware of the adverse effects of kitchen fumes on the indoor environment. Kitchen fumes contain over 300 harmful substances, mainly aldehydes, ketones, hydrocarbons, fatty acids, alcohols, aromatic compounds, lactones, and heterocyclic compounds. These harmful substances have pulmonary toxicity, immunotoxicity, genotoxicity, and potential carcinogenicity. Related technologies involve installing filter components in the ducts of fume exhaust systems to filter organic matter or particulate matter from the fumes. However, these filters in kitchen exhaust systems are prone to clogging and require frequent replacement. Furthermore, commercial kitchens often have large and dirty oil stains that are difficult to clean, resulting in a poor user experience. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention proposes an oil fume exhaust system that can automatically control a cleaning component to spray cleaning water containing detergent onto the filter component when the filter component is clogged. This reduces the need for manual cleaning of oil stains, improves cleaning efficiency, and enhances the user experience.

[0004] The present invention also provides a control method for an oil fume exhaust system.

[0005] The present invention also provides a control device for an oil fume exhaust system.

[0006] According to a first aspect embodiment of the present invention, a fume exhaust system includes:

[0007] The air duct is equipped with an air inlet and an air outlet;

[0008] The fan is installed inside the air duct;

[0009] A filter assembly is disposed within the air duct;

[0010] The differential pressure detection component includes a first pressure sensor and a second pressure sensor. The first pressure sensor is located on the side of the filter component closer to the air inlet, and the second pressure sensor is located on the side of the filter component closer to the air outlet. The first pressure sensor is used to detect the air inlet pressure, and the second pressure sensor is used to detect the air outlet pressure.

[0011] A cleaning assembly includes a nozzle and a booster pump connected to the nozzle, the nozzle being disposed within the air duct and located on one side of the filter assembly;

[0012] A controller is electrically connected to the fan, the first pressure sensor, the second pressure sensor, and the booster pump. The controller is configured to control the operation of the cleaning assembly and the fan based on the inlet side pressure and the outlet side pressure.

[0013] According to one embodiment of the present invention, the cleaning assembly further includes:

[0014] The cleaning water tank is connected to the booster pump via a pipeline;

[0015] A detergent tank is connected to the cleaning water tank via a pipeline. A first solenoid valve is installed on the pipeline between the cleaning water tank and the detergent tank. The first solenoid valve is electrically connected to the controller.

[0016] A detergent concentration sensor is installed inside the cleaning water tank and electrically connected to the controller.

[0017] According to one embodiment of the present invention, the cleaning assembly further includes:

[0018] A water receiving device is installed inside the air duct and located below the filter assembly; the water receiving device is connected to the sewage drainage pipe.

[0019] A wastewater treatment system is installed on the wastewater drainage pipeline.

[0020] According to one embodiment of the present invention, the sewage treatment system is connected to the booster pump via a pipeline, and a second solenoid valve is provided on the pipeline between the sewage treatment system and the booster pump, the second solenoid valve being electrically connected to the controller.

[0021] According to one embodiment of the present invention, it further includes:

[0022] Hot water storage tank;

[0023] The heat pump system includes a compressor, a throttling valve, an evaporator located in the air duct, and a condenser located in the hot water storage tank. The evaporator, the condenser, the compressor, and the throttling valve are connected by refrigerant pipelines to form a refrigerant circulation loop.

[0024] According to one embodiment of the present invention, the hot water storage tank is connected to the cleaning water tank via a pipeline, a third solenoid valve is provided on the pipeline between the cleaning water tank and the hot water storage tank, a water level sensor is provided in the cleaning water tank, and the water level sensor and the third solenoid valve are electrically connected to the controller.

[0025] According to one embodiment of the present invention, the heat pump system further includes:

[0026] A refrigerant container is connected to the refrigerant circulation loop via a refrigerant pipeline, and a fourth solenoid valve is provided on the refrigerant pipeline between the refrigerant container and the refrigerant circulation loop;

[0027] A refrigerant pressure sensor is installed on the refrigerant circulation loop;

[0028] The fourth solenoid valve and the refrigerant pressure sensor are electrically connected to the controller.

[0029] According to a second aspect embodiment of the present invention, a control method for an oil fume exhaust system includes:

[0030] The inlet and outlet pressures of the filter assembly are obtained, and the ventilation state of the filter assembly is determined based on the inlet pressure, the outlet pressure, and a predetermined filter assembly state relationship; wherein the ventilation state includes a blocked state and a clear state.

[0031] When the ventilation is blocked, the fan is stopped and the nozzle of the cleaning component sprays cleaning water containing detergent onto the filter component until a preset condition is met; wherein, the preset condition includes: the spraying time of the nozzle is greater than or equal to a preset spraying time.

[0032] When the ventilation status is unobstructed, the fume exhaust system is controlled to operate according to the set mode.

[0033] According to one embodiment of the present invention, the control method further includes:

[0034] Obtain the water level in the cleaning tank;

[0035] When the water level is lower than the first preset water level, the third solenoid valve is opened, and hot water from the hot water storage tank is introduced into the cleaning water tank until the water level is greater than or equal to the second preset water level; wherein the second preset water level is higher than the first preset water level.

[0036] According to one embodiment of the present invention, the step of introducing hot water from the hot water storage tank into the cleaning water tank further includes:

[0037] Obtain the detergent concentration in the cleaning water tank;

[0038] When the detergent concentration is lower than the preset concentration, the first solenoid valve is opened, and the detergent in the detergent tank is introduced into the cleaning water tank until the detergent concentration in the cleaning water tank is greater than or equal to the preset concentration.

[0039] According to one embodiment of the present invention, the control method further includes:

[0040] Obtain the refrigerant pressure within the refrigerant circulation loop;

[0041] When the refrigerant pressure is between the first refrigerant pressure and the second refrigerant pressure, the fourth solenoid valve is opened to replenish the refrigerant in the refrigerant container into the refrigerant circulation loop until the refrigerant pressure is greater than or equal to the first refrigerant pressure.

[0042] When the refrigerant pressure is lower than the second refrigerant pressure, the control prompt component issues a refrigerant leak warning signal.

[0043] A control device for an oil fume exhaust system according to a third aspect embodiment of the present invention includes:

[0044] The acquisition module is used to acquire the inlet side pressure and outlet side pressure of the filter assembly, and determine the ventilation state of the filter assembly based on the inlet side pressure, the outlet side pressure and a predetermined filter assembly state relationship; wherein, the ventilation state includes a blocked state and a clear state.

[0045] The control module is used to control the fan to stop and control the nozzles of the cleaning component to spray cleaning water containing detergent onto the filter component when the ventilation state is the blocked state, until a preset condition is met; wherein the preset condition includes: the spraying time of the nozzle is greater than or equal to a preset spraying time; and when the ventilation state is the unobstructed state, control the fume exhaust system to operate according to a set mode.

[0046] The above-described one or more technical solutions of this invention have at least one of the following technical effects:

[0047] The fume exhaust system provided in this embodiment of the invention includes an air duct, a fan, a filter assembly, a differential pressure detection assembly, and a cleaning assembly. The air duct has an air inlet and an air outlet, and the fan and filter assembly are disposed within the air duct. The differential pressure detection assembly includes a first pressure sensor and a second pressure sensor. The first pressure sensor is located on the side of the filter assembly near the air inlet, and the second pressure sensor is located on the side of the filter assembly near the air outlet. The first pressure sensor is used to detect the inlet pressure, and the second pressure sensor is used to detect the outlet pressure. The cleaning assembly includes a nozzle and a booster pump connected to the nozzle. The nozzle is disposed within the air duct and located on one side of the filter assembly. A controller is electrically connected to the fan, the first pressure sensor, the second pressure sensor, and the booster pump. The fume exhaust system provided in this embodiment of the invention can determine the ventilation state of the filter assembly based on the inlet and outlet pressures of the filter assembly, and then control the cleaning assembly to spray cleaning water containing detergent onto the filter assembly according to the ventilation state. This reduces the manual cleaning of oil stains, improves the cleaning effect, and enhances the user experience. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic structural diagram of an oil fume exhaust system provided in an embodiment of the present invention;

[0050] Figure 2 A flowchart of a control method for an oil fume exhaust system provided in an embodiment of the present invention;

[0051] Figure 3 A schematic structural diagram of the control device for the fume exhaust system provided in an embodiment of the present invention;

[0052] Figure 4 This is a schematic structural diagram of the electronic device for the fume exhaust system provided in an embodiment of the present invention.

[0053] Figure label:

[0054] 10. Air duct; 11. Air inlet; 12. Air outlet; 13. Fan; 141. First pressure sensor; 142. Second pressure sensor; 15. Filter assembly;

[0055] 21. Sprayer head; 22. Booster pump; 23. Cleaning water tank; 24. Detergent tank; 25. First solenoid valve; 26. Water receiving fitting; 27. Wastewater treatment system; 28. Second solenoid valve;

[0056] 30. Hot water storage tank; 31. Evaporator; 32. Condenser; 33. Third solenoid valve; 34. Refrigerant container; 35. Refrigerant pressure sensor; 36. Fourth solenoid valve;

[0057] 40. Hot water supply equipment;

[0058] 301. Acquisition module; 302. Control module. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the invention clearer, the technical solutions of the invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0060] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0062] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] In related technologies, filter components are installed in the duct of the fume exhaust system to filter organic matter or particulate matter in the fumes. However, the filter components in the kitchen exhaust system are prone to clogging and need to be replaced frequently. Moreover, commercial kitchens have large and dirty grease stains that are difficult to clean, resulting in a poor user experience.

[0065] Please refer to the fume exhaust system provided in the first aspect embodiment of the present invention. Figure 1 The fume exhaust system includes duct 10, fan 13, filter assembly 15, differential pressure detection assembly, cleaning assembly, and controller, etc.

[0066] The fume exhaust system includes an exhaust duct connecting the indoor kitchen and the outdoors. The exhaust duct forms a duct 10, which has an air inlet 11 and an air outlet 12. The air inlet 11 is located inside the kitchen and is used to draw in the fumes from the kitchen. The air outlet 12 is located outdoors and is used to exhaust the fumes from the kitchen.

[0067] A fan 13 and a filter assembly 15 are installed inside the air duct 10. The size of the filter assembly 15 is adapted to the cross-sectional size of the air duct 10. When the fan 13 is working, it creates a negative pressure at the air inlet 11, which can draw the oil fumes in the kitchen into the air duct 10 and then discharge them along the air outlet 12.

[0068] The pressure detection assembly includes a first pressure sensor 141 and a second pressure sensor 142. The first pressure sensor 141 is located on the side of the filter assembly 15 near the air inlet 11, and the second pressure sensor 142 is located on the side of the filter assembly 15 near the air outlet 12. The first pressure sensor 141 is used to detect the inlet pressure, and the second pressure sensor 142 is used to detect the outlet pressure. After oil fumes adhere to the filter assembly 15, the ventilation capacity of the filter assembly 15 weakens. At this time, the inlet and outlet pressures will change. Based on the changes in the inlet and outlet pressures, the ventilation status of the filter assembly 15 can be measured, and thus it can be determined whether the filter assembly 15 needs cleaning.

[0069] The cleaning assembly includes a nozzle 21 and a booster pump 22 connected to the nozzle 21. The nozzle 21 is disposed within the air duct 10 and located on one side of the filter assembly 15, for spraying cleaning water containing detergent onto the filter assembly 15. Multiple nozzles 21 can be used, and the cleaning water can cover the entire side of the filter assembly 15. The other end of the booster pump 22 is connected to a water supply line, which supplies cleaning water to either the booster pump 22 or the nozzle 21. In some cases, to enhance the cleaning capability of the cleaning assembly, high-temperature cleaning water can be sprayed onto the filter assembly 15; the detergent in the high-temperature cleaning water helps to improve the ability to remove oil stains.

[0070] The controller is electrically connected to the fan 13, the first pressure sensor 141, the second pressure sensor 142, and the booster pump 22. The controller is configured to control the operation of the cleaning components and the fan 13 based on the inlet side pressure and the outlet side pressure.

[0071] The fume exhaust system provided in this embodiment of the invention can determine the ventilation state of the filter component 15 based on the inlet and outlet pressures of the filter component 15, and then control the cleaning component to spray cleaning water with detergent onto the filter component 15 according to the ventilation state, which reduces the work of manually cleaning oil stains, improves the cleaning effect, and enhances the user experience.

[0072] In some embodiments, the cleaning assembly further includes a cleaning water tank 23, a detergent tank 24, and a detergent concentration sensor. The cleaning water tank 23 is connected to the booster pump 22 via a pipeline, and the detergent tank 24 is connected to the cleaning water tank 23 via a pipeline. A first solenoid valve 25 is provided on the pipeline between the cleaning water tank 23 and the detergent tank 24. The first solenoid valve 25 is electrically connected to the controller. The detergent concentration sensor is located inside the cleaning water tank 23 and is electrically connected to the controller.

[0073] Please see Figure 1 The cleaning water tank 23 stores cleaning water with detergent, and the detergent tank 24 stores detergent. Controlling the opening and closing of the first solenoid valve 25 adjusts the detergent concentration in the cleaning water tank 23, thereby achieving a better cleaning effect. The detergent concentration sensor and the first solenoid valve 25 are electrically connected to the controller. Therefore, the fume exhaust system provided by this invention can automatically adjust the detergent concentration in the cleaning water tank 23, allowing for timely adjustment after water is added to the cleaning water tank 23, ensuring the cleaning components' decontamination capability.

[0074] In some embodiments, the cleaning assembly further includes a water receiving element 26 and a sewage treatment system 27. The water receiving element 26 is disposed in the air duct 10 and located below the filter assembly 15. The water receiving element 26 is connected to the sewage drainage pipe, and the sewage treatment system 27 is installed on the sewage drainage pipe.

[0075] Please see Figure 1 After the cleaning component's nozzle 21 sprays cleaning water onto the filter component 15, the cleaning water and the washed-off oil flow to the bottom of the filter component 15 under gravity. This mixed wastewater needs to be discharged through a sewage drainage pipe. In this embodiment of the invention, a sewage treatment system 27 is installed on the sewage drainage pipe, which can filter out large pieces of oil from the mixed wastewater, preventing pollution of the urban pipe network. This portion of the blocky oil needs to be treated to render it harmless, which helps protect the environment.

[0076] In some embodiments, the wastewater treatment system 27 is connected to the booster pump 22 via a pipeline, and a second solenoid valve 28 is provided on the pipeline between the wastewater treatment system 27 and the booster pump 22. The second solenoid valve 28 is electrically connected to the controller.

[0077] Please see Figure 1 A second solenoid valve 28 is installed on the pipeline between the sewage treatment system 27 and the booster pump 22. Controlling the second solenoid valve 28 to be in the conducting state activates the booster pump 22, allowing the sewage initially separated by the sewage treatment system 27 to be recirculated to the filter assembly 15. In the initial cleaning stage of the filter assembly 15, the focus is on removing large pieces of grease. At this time, the cleaning water is recycled, improving its utilization efficiency and conserving water resources. In the later cleaning stage of the filter assembly 15, the focus is on achieving a better cleaning effect. At this time, water needs to be replenished to the nozzles 21 through the cleaning water tank, avoiding the use of recycled water. The fume exhaust system provided in this embodiment of the invention can adjust the type of water supplied according to different cleaning stages of the filter assembly 15 to achieve a balance between water conservation and cleaning effect.

[0078] In some embodiments, the fume exhaust system further includes a hot water storage tank 30 and a heat pump system. The hot water storage tank 30 has a cavity for holding hot water and has a heat preservation effect. The heat pump system includes a compressor, a throttling valve, an evaporator 31 located in the air duct 10, and a condenser 32 located in the hot water storage tank 30. The evaporator 31, condenser 32, compressor, and throttling valve are connected by refrigerant pipelines to form a refrigerant circulation loop.

[0079] Please see Figure 1 Kitchen fumes contain a large amount of waste heat. Directly emitting these fumes wastes resources and raises ambient temperatures, which is detrimental to environmental protection. The heat pump system includes a refrigerant circulation loop consisting of an evaporator 31, a condenser 32, a compressor, and a throttling valve. During the phase change of the refrigerant within the circulation loop, the refrigerant absorbs heat from the fumes in the air duct 10 and then transfers this heat to a hot water storage tank 30, where hot water can be produced. The hot water storage tank 30 is connected to a hot water device 40, meeting the user's daily needs. In this invention, the heat pump system has a high heat exchange efficiency, reaching up to 90%. The evaporator 31 of the heat pump system absorbs heat from the fumes and releases it to the hot water storage tank 30 at the condenser end through a split heat pipe channel. The water in the hot water storage tank 30 absorbs heat, its temperature rises, and it is stored in the tank for use as domestic hot water.

[0080] In some embodiments, the hot water storage tank 30 is connected to the cleaning water tank 23 via a pipeline. A third solenoid valve 33 is installed on the pipeline between the cleaning water tank 23 and the hot water storage tank 30. A water level sensor is installed inside the cleaning water tank 23. The water level sensor and the third solenoid valve 33 are electrically connected to the controller.

[0081] Please see Figure 1 A third solenoid valve 33 is installed on the pipeline between the cleaning water tank 23 and the hot water storage tank 30. When the height of the hot water storage tank 30 is higher than the height of the cleaning water tank 23, the third solenoid valve 33 is opened, allowing hot water from the hot water storage tank 30 to flow into the cleaning water tank 23. The hot water generated by recovering heat can then be used to clean the filter assembly 15, improving heat utilization efficiency. In this embodiment, a water level sensor is installed in the cleaning water tank 23, and the controller is electrically connected to the water level sensor and the third solenoid valve 33. Therefore, the water level in the cleaning water tank 23 can be automatically adjusted, preventing insufficient hot water and improving the cleaning effect of the filter assembly 15. When the height of the cleaning water tank 23 is greater than or equal to that of the hot water storage tank 30, a booster pump 22 can be installed on the pipeline between the cleaning water tank 23 and the hot water storage tank 30. The booster pump 22 is used to actively replenish water to the cleaning water tank 23.

[0082] In some embodiments, the heat pump system further includes a refrigerant container 34, a refrigerant pressure sensor 35, and a fourth solenoid valve 36. The refrigerant container 34 is connected to the refrigerant circulation loop via a refrigerant pipeline. The fourth solenoid valve 36 is installed on the refrigerant pipeline between the refrigerant container 34 and the refrigerant circulation loop. The refrigerant pressure sensor 35 is installed on the refrigerant circulation loop. The fourth solenoid valve 36 and the refrigerant pressure sensor 35 are electrically connected to the controller.

[0083] Please see Figure 1 The refrigerant container 34 stores excess refrigerant. When the refrigerant level in the refrigerant circulation system is low, it is not conducive to recovering the heat from the fumes. At this time, the fourth solenoid valve 36 can be opened to replenish refrigerant into the refrigerant circulation loop through the refrigerant container 34. A refrigerant pressure sensor 35 is installed on the refrigerant circulation loop. Based on the received refrigerant pressure signal, the controller can automatically control the refrigerant container 34 to replenish refrigerant into the refrigerant circulation loop.

[0084] According to a second aspect embodiment of the present invention, a control method for an oil fume exhaust system includes:

[0085] The inlet and outlet pressures of the filter assembly are obtained, and the ventilation status of the filter assembly is determined based on the inlet and outlet pressures and a predetermined relationship between the filter assembly statuses; wherein the ventilation status includes a blocked state and an unobstructed state.

[0086] Understandably, a first pressure sensor is installed on the air inlet side of the filter assembly, and a second pressure sensor is installed on the air outlet side. The first pressure sensor detects the inlet pressure, and the second pressure sensor detects the outlet pressure. After the filter assembly absorbs oil fumes, its ventilation capacity weakens, causing changes in the inlet and outlet pressures. These changes indicate the ventilation status of the filter assembly, allowing for a determination of whether cleaning is necessary. After the filter assembly has been operating for a period, a significant amount of oil fumes accumulates, increasing the pressure difference between the inlet and outlet sides. A pressure threshold is set based on actual usage. When the pressure difference is greater than or equal to the set threshold, the filter assembly's ventilation is blocked and requires cleaning; when the pressure difference is less than or equal to the set threshold, the filter assembly's ventilation is unobstructed, and cleaning is not required.

[0087] When the ventilation is blocked, the fan is stopped and the nozzles of the cleaning component spray cleaning water containing detergent onto the filter component until the preset conditions are met. The preset conditions include: the spraying time of the nozzles is greater than or equal to the preset spraying time.

[0088] Understandably, when the ventilation is blocked, the filter components need to be cleaned. At this time, the fan is stopped, and the booster pump of the cleaning component is activated to spray the cleaning water in the cleaning water tank onto the filter components. After the fan stops, the cleaning water will not come into contact with other electronic components, thus improving the safety of the fume exhaust system.

[0089] When ventilation is unobstructed, the fume exhaust system operates according to the preset mode. When the filter components do not require cleaning, the fume exhaust system operates in the preset mode to promptly remove indoor fumes.

[0090] The control method for the fume exhaust system provided in this invention can determine the ventilation state of the filter component based on the inlet and outlet pressures of the filter component, and then control the cleaning component to spray cleaning water containing detergent onto the filter component according to the ventilation state. This reduces the work of manually cleaning the filter component of oil stains, improves the cleaning effect, and enhances the user experience.

[0091] Please see Figure 2 The control method for the fume exhaust system provided in this embodiment of the invention includes the following process:

[0092] S200: Obtain the inlet and outlet pressures of the filter assembly.

[0093] S210. Determine the ventilation status of the filter assembly based on the inlet side pressure, the outlet side pressure, and the predetermined filter assembly status relationship.

[0094] S220. Determine if the ventilation is blocked.

[0095] If yes, proceed to step S230; otherwise, proceed to step S240.

[0096] S230: Control the fan to stop and control the nozzle of the cleaning component to spray cleaning water containing detergent onto the filter component until the preset conditions are met.

[0097] S240, Control the fume exhaust system to operate according to the set mode.

[0098] Based on steps S200 to S240 above, the ventilation status of the filter component can be determined based on the inlet and outlet pressures of the filter component. Then, the cleaning component is controlled to spray cleaning water containing detergent onto the filter component according to the ventilation status, which reduces the work of manually cleaning the filter component of oil stains, improves the cleaning effect, and enhances the user experience.

[0099] In some embodiments, the control method for the fume exhaust system further includes:

[0100] Obtain the water level in the cleaning tank.

[0101] When the water level is lower than the first preset water level, the third solenoid valve is opened, and hot water from the hot water storage tank is introduced into the cleaning water tank until the water level is greater than or equal to the second preset water level; wherein the second preset water level is higher than the first preset water level.

[0102] In this embodiment of the invention, a third solenoid valve is installed on the pipeline between the cleaning water tank and the hot water storage tank. When the height of the hot water storage tank is higher than that of the cleaning water tank, the third solenoid valve is opened, allowing hot water from the hot water storage tank to flow into the cleaning water tank. The hot water generated by recovering heat can then be used to clean the filter components, improving heat utilization efficiency. When the height of the cleaning water tank is greater than or equal to that of the hot water storage tank, a booster pump can be installed on the pipeline between the two tanks to actively replenish water to the cleaning water tank. In this embodiment, a water level sensor is installed in the cleaning water tank, and the controller is electrically connected to the water level sensor and the third solenoid valve. Therefore, the water level in the cleaning water tank can be automatically adjusted to prevent insufficient hot water. When the water level in the cleaning water tank is lower than a first preset water level, the third solenoid valve is opened to promptly replenish hot water to the cleaning water tank, ensuring a good cleaning effect on the filter components. When the water level in the cleaning tank is greater than or equal to the second preset water level, water is stopped being added to the cleaning tank. Therefore, the water level in the cleaning tank is always maintained between the first and second preset water levels, thus ensuring sufficient water supply when cleaning the filter components.

[0103] In some embodiments, the step of introducing hot water from the hot water storage tank into the cleaning tank further includes:

[0104] Obtain the detergent concentration in the cleaning water tank.

[0105] When the detergent concentration is lower than the preset concentration, the first solenoid valve is opened, and the detergent in the detergent tank is introduced into the cleaning water tank until the detergent concentration in the cleaning water tank is greater than or equal to the preset concentration.

[0106] Understandably, to enhance the removal of grease from the filter components by hot water, the detergent concentration in the cleaning water needs to be adjusted to a preset concentration or higher, utilizing the detergent's activity to dissolve the grease adhering to the filter components. After the cleaning water is consumed, hot water is replenished to the cleaning water tank through the hot water storage tank. At this time, the detergent concentration decreases, which is not conducive to grease removal. Therefore, detergent needs to be replenished to the cleaning water tank through the detergent tank to ensure that the detergent concentration in the cleaning water meets the requirements. In this embodiment of the invention, by monitoring the detergent concentration in the cleaning water tank, the opening and closing of the first solenoid valve is automatically controlled, and the detergent concentration in the cleaning water tank is automatically adjusted, which is more convenient to use and helps to ensure the cleaning ability.

[0107] In some embodiments, the control method for the fume exhaust system further includes:

[0108] Obtain the refrigerant pressure within the refrigerant circulation loop.

[0109] When the refrigerant pressure is between the first refrigerant pressure and the second refrigerant pressure, the fourth solenoid valve is opened to replenish the refrigerant in the refrigerant container into the refrigerant circulation loop until the refrigerant pressure is greater than or equal to the first refrigerant pressure.

[0110] When the refrigerant pressure is lower than the second refrigerant pressure, the control indicator component will issue a refrigerant leak warning signal.

[0111] It is understandable that when there is excess refrigerant stored in the refrigerant container and the refrigerant level in the refrigerant circulation system is low, it is not conducive to recovering the heat from the fumes in the duct. In this case, the fourth solenoid valve can be opened to replenish refrigerant into the refrigerant circulation loop through the refrigerant container. When a refrigerant pressure sensor is installed on the refrigerant circulation loop, the controller can automatically control the refrigerant container to replenish refrigerant into the refrigerant circulation loop based on the received refrigerant pressure signal. In this embodiment of the invention, the refrigerant pressure in the refrigerant circulation loop is detected by the refrigerant pressure sensor. When the refrigerant pressure is between the first and second refrigerant pressures, it indicates that there is a partial refrigerant leak or the refrigerant is not in an optimal temperature environment in the refrigerant circulation loop. The refrigerant pressure in the refrigerant circulation loop can be adjusted to improve heat exchange efficiency. When the refrigerant pressure is less than the second refrigerant pressure, it indicates that the refrigerant leak in the refrigerant circulation loop is serious, and it is impossible to replenish refrigerant into the refrigerant circulation loop through the refrigerant container. It is necessary to promptly issue a warning message to the user, reminding them of the refrigerant leak and requiring immediate repair, thus improving the safety of the system.

[0112] For the control device of the fume exhaust system provided in the third aspect embodiment of the present invention, please refer to [link / reference]. Figure 3 ,include:

[0113] The acquisition module 301 is used to acquire the inlet side pressure and outlet side pressure of the filter component, and determine the ventilation state of the filter component based on the inlet side pressure, the outlet side pressure and a predetermined filter component state relationship; wherein, the ventilation state includes a blocked state and an unobstructed state.

[0114] The control module is used to control the fan to stop and control the nozzles of the cleaning component to spray cleaning water containing detergent onto the filter component when the ventilation state is blocked, until preset conditions are met; wherein the preset conditions include: the spraying time of the nozzles is greater than or equal to the preset spraying time; and when the ventilation state is unobstructed, control the fume exhaust system to operate according to the set mode.

[0115] It should be noted that steps S200 to S240 and other steps are for ease of description only and do not constitute a time sequence limitation for the steps in the control method of the fume exhaust system. Furthermore, some content is described in detail in the control method of the fume exhaust system provided in the second aspect embodiment, and all content in the control method of the fume exhaust system can also be applied to the control device of the fume exhaust system provided in the third aspect embodiment. Therefore, to avoid repetition, the control device of the fume exhaust system provided in the third aspect embodiment is not described in detail. Similarly, the content in the above two aspects embodiments can be used to explain the content of all subsequent aspects embodiments; therefore, repeated content will not be described in the following embodiments. The technical effects of the control device of the fume exhaust system provided according to the embodiments of the present invention correspond to the technical effects of the above-described control method of the fume exhaust system, and will not be described again here.

[0116] The fume exhaust system provided according to a fourth aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the control method for the multi-unit heat exchange system provided according to a second aspect of the present invention.

[0117] Figure 4 A schematic diagram illustrating the physical structure of an electronic device for an oil fume exhaust system is provided. This electronic device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logical instructions in the memory 830 to execute a control method for the oil fume exhaust system. This method includes: acquiring the inlet and outlet pressures of the filter assembly, and determining the ventilation state of the filter assembly based on the inlet and outlet pressures and a predetermined filter assembly state relationship; wherein the ventilation state includes a blocked state and an unobstructed state; when the ventilation state is blocked, controlling the fan to stop and controlling the nozzles of the cleaning assembly to spray cleaning water containing detergent onto the filter assembly until a preset condition is met; wherein the preset condition includes: the spraying duration of the nozzles is greater than or equal to a preset spraying duration; and when the ventilation state is unobstructed, controlling the oil fume exhaust system to operate according to a set mode.

[0118] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0119] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0120] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fume exhaust system, characterized in that, include: The air duct is equipped with an air inlet and an air outlet; The fan is installed inside the air duct; A filter assembly is disposed within the air duct; The differential pressure detection component includes a first pressure sensor and a second pressure sensor. The first pressure sensor is located on the side of the filter component closer to the air inlet, and the second pressure sensor is located on the side of the filter component closer to the air outlet. The first pressure sensor is used to detect the air inlet pressure, and the second pressure sensor is used to detect the air outlet pressure. A cleaning assembly includes a nozzle and a booster pump connected to the nozzle, the nozzle being disposed within the air duct and located on one side of the filter assembly; A controller, electrically connected to the fan, the first pressure sensor, the second pressure sensor, and the booster pump, is configured to control the operation of the cleaning assembly and the fan based on the inlet side pressure and the outlet side pressure; determine the ventilation state of the filter assembly according to the inlet side pressure, the outlet side pressure, and a predetermined filter assembly state relationship, the ventilation state including a blocked state and a clear state; when the pressure difference is greater than or equal to a set pressure threshold, and the ventilation state is blocked, control the fan to stop, and control the nozzle of the cleaning assembly to spray cleaning water containing detergent onto the filter assembly.

2. The fume exhaust system according to claim 1, characterized in that, The cleaning assembly also includes: The cleaning water tank is connected to the booster pump via a pipeline; A detergent tank is connected to the cleaning water tank via a pipeline. A first solenoid valve is installed on the pipeline between the cleaning water tank and the detergent tank. The first solenoid valve is electrically connected to the controller. A detergent concentration sensor is installed inside the cleaning water tank and electrically connected to the controller.

3. The fume exhaust system according to claim 2, characterized in that, The cleaning assembly also includes: A water receiving device is installed inside the air duct and located below the filter assembly; the water receiving device is connected to the sewage drainage pipe. A wastewater treatment system is installed on the wastewater drainage pipeline.

4. The fume exhaust system according to claim 3, characterized in that, The wastewater treatment system is connected to the booster pump via a pipeline. A second solenoid valve is installed on the pipeline between the wastewater treatment system and the booster pump. The second solenoid valve is electrically connected to the controller.

5. The fume exhaust system according to any one of claims 2 to 4, characterized in that, Also includes: Hot water storage tank; The heat pump system includes a compressor, a throttling valve, an evaporator located in the air duct, and a condenser located in the hot water storage tank. The evaporator, the condenser, the compressor, and the throttling valve are connected by refrigerant pipelines to form a refrigerant circulation loop.

6. The fume exhaust system according to claim 5, characterized in that, The hot water storage tank is connected to the cleaning water tank via a pipeline. A third solenoid valve is installed on the pipeline between the cleaning water tank and the hot water storage tank. A water level sensor is installed inside the cleaning water tank. The water level sensor and the third solenoid valve are electrically connected to the controller.

7. The fume exhaust system according to claim 5, characterized in that, The heat pump system also includes: A refrigerant container is connected to the refrigerant circulation loop via a refrigerant pipeline, and a fourth solenoid valve is provided on the refrigerant pipeline between the refrigerant container and the refrigerant circulation loop; A refrigerant pressure sensor is installed on the refrigerant circulation loop; The fourth solenoid valve and the refrigerant pressure sensor are electrically connected to the controller.

8. A control method for an oil fume exhaust system as described in any one of claims 1 to 7, characterized in that, include: The inlet and outlet pressures of the filter assembly are obtained, and the ventilation state of the filter assembly is determined based on the inlet pressure, the outlet pressure, and a predetermined filter assembly state relationship; wherein the ventilation state includes a blocked state and a clear state. When the ventilation is blocked, the fan is stopped and the nozzle of the cleaning component sprays cleaning water containing detergent onto the filter component until a preset condition is met; wherein, the preset condition includes: the spraying time of the nozzle is greater than or equal to a preset spraying time. When the ventilation status is unobstructed, the fume exhaust system is controlled to operate according to the set mode.

9. The control method for the fume exhaust system according to claim 8, characterized in that, The control method further includes: Obtain the water level in the cleaning tank; When the water level is lower than the first preset water level, the third solenoid valve is opened, and hot water from the hot water storage tank is introduced into the cleaning water tank until the water level is greater than or equal to the second preset water level; wherein the second preset water level is higher than the first preset water level.

10. The control method for the fume exhaust system according to claim 9, characterized in that, The step of introducing hot water from the hot water storage tank into the cleaning water tank further includes: Obtain the concentration of detergent in the cleaning water tank; When the detergent concentration is lower than the preset concentration, the first solenoid valve is opened, and the detergent in the detergent tank is introduced into the cleaning water tank until the detergent concentration in the cleaning water tank is greater than or equal to the preset concentration.

11. The control method for the fume exhaust system according to claim 10, characterized in that, The control method further includes: Obtain the refrigerant pressure within the refrigerant circulation loop; When the refrigerant pressure is between the first refrigerant pressure and the second refrigerant pressure, the fourth solenoid valve is opened to replenish the refrigerant in the refrigerant container into the refrigerant circulation loop until the refrigerant pressure is greater than or equal to the first refrigerant pressure. When the refrigerant pressure is lower than the second refrigerant pressure, the control prompt component issues a refrigerant leak warning signal.

12. A control device for an oil fume exhaust system, characterized in that, The control device is used in the fume exhaust system as described in any one of claims 1 to 7, comprising: The acquisition module is used to acquire the inlet side pressure and outlet side pressure of the filter assembly, and determine the ventilation state of the filter assembly based on the inlet side pressure, the outlet side pressure and a predetermined filter assembly state relationship; wherein, the ventilation state includes a blocked state and a clear state. The control module is used to control the fan to stop and control the nozzles of the cleaning component to spray cleaning water containing detergent onto the filter component when the ventilation state is the blocked state, until a preset condition is met; wherein the preset condition includes: the spraying time of the nozzle is greater than or equal to a preset spraying time; and when the ventilation state is the unobstructed state, control the fume exhaust system to operate according to a set mode.

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