A noise reduction working method of a refrigeration range hood, a range hood and a storage medium

Abstract

The present application relates to a kind of refrigeration range hood noise reduction working method, refrigeration range hood is built-in air conditioning module, after the refrigeration function of refrigeration range hood is opened, according to the comparison result of real-time condensing temperature and set condensing temperature threshold, control adjustment cooling fan speed, compressor speed, and then obtain the first group of operating parameters that condensing temperature is stabilized at condensing temperature threshold value.According to the comparison result of real-time evaporation temperature and set evaporation temperature threshold, control adjustment evaporator fan speed, and then obtain the second group of operating parameters that evaporation temperature can be stabilized at evaporation temperature threshold value.Then according to the second group of operating parameters, air conditioning module is controlled to work.The refrigeration range hood noise reduction working method can improve the noise problem when air conditioning module operates.The present application also relates to range hood using the refrigeration range hood noise reduction working method, and a kind of storage medium that the program of being executed to realize the refrigeration range hood noise reduction working method is stored.

Description

Technical Field

[0001] This invention relates to a noise reduction method for a refrigerated range hood, the range hood itself, and a storage medium. Background Technology

[0002] Kitchen temperature is a significant factor affecting comfort during cooking, especially in summer when kitchens become stuffy and uncomfortable. To address this, some users open windows and doors to cool down, but this causes cooking fumes to escape and pollute the outside air. Others install separate air conditioners in the kitchen to solve the problem, but this takes up space, is not feasible in some kitchens, and is costly.

[0003] Based on the above problems, to improve the comfort of kitchen use without occupying additional installation space, products combining range hoods and air conditioners have emerged. For example, the Chinese utility model patent "An Air Conditioning Range Hood" (CN210861273U, application number 201921440241.2) discloses a range hood that integrates an air conditioner to address the issue of stuffiness in the kitchen. However, in this type of range hood, the compressor, condenser, and evaporator constitute an air conditioning module housed within the air conditioner casing. When the cooling function is activated, the air conditioning module itself needs heat dissipation to ensure normal cooling operation. Therefore, additional exhaust and blower fans are required to address the heat dissipation problem of the air conditioning module. However, the operation of the exhaust and blower fans inevitably generates noise, and the higher the fan speed, the louder the noise. Furthermore, the compressor also generates additional noise during speed adjustment, and the greater the speed adjustment range, the louder the noise. Simultaneously, when the compressor and range hood fans operate together, resonance noise is easily generated, further amplifying the noise problem.

[0004] Another type utilizes a range hood to dissipate heat from the condenser, such as the Chinese utility model patent CN209926411U (application number 201920460790.X) entitled "A Refrigerating Range Hood Device." This disclosed refrigerating range hood includes: a range hood system, a refrigeration system, and a housing. The housing forms a cavity, and the range hood system and refrigeration system are installed within the cavity. The refrigeration system has a cold air passage and an exhaust passage. The range hood system is equipped with an exhaust duct, and the refrigeration system is connected to an air outlet device. The cold air passage and the air outlet device are connected. In this type of refrigerating range hood, the condenser is located in the range hood, and the airflow from the fumes dissipates heat from the condenser. Over time, the condenser easily becomes dirty, reducing its heat dissipation efficiency. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a noise reduction method for a cooling range hood that can effectively reduce operating noise while ensuring the cooling effect, in contrast to the above-mentioned prior art.

[0006] The second technical problem to be solved by the present invention is to provide a range hood that applies the aforementioned noise reduction method of the refrigerated range hood, in contrast to the prior art.

[0007] The third technical problem to be solved by the present invention is to provide a storage medium that stores control instructions for implementing the aforementioned noise reduction method of the refrigerated range hood, in contrast to the prior art.

[0008] The technical solution adopted by this invention to solve the first problem mentioned above is: a method for noise reduction in a refrigerated range hood, wherein the refrigerated range hood has a built-in air conditioning module, the air conditioning module includes a compressor, a condenser, and an evaporator, and the range hood also has a built-in cooling fan for dissipating heat from the compressor and condenser, characterized by including the following steps:

[0009] Step 1: Turn on the cooling function of the range hood;

[0010] Step 2: Control the compressor speed, evaporator fan speed, and cooling fan speed in the air conditioning module to operate according to the initial operating parameters;

[0011] Step 3: Monitor the condensation temperature and evaporation temperature in real time;

[0012] Step 4: Based on the comparison between the real-time condensing temperature and the set condensing temperature threshold, control and adjust the speed of the cooling fan and the speed of the compressor to obtain the first set of operating parameters that can stabilize the condensing temperature at the condensing temperature threshold. The first set of operating parameters includes the current speed of the cooling fan and the speed of the compressor.

[0013] Step 5: Based on the comparison between the real-time evaporation temperature and the set evaporation temperature threshold, control and adjust the evaporator fan speed to obtain a second set of operating parameters that can stabilize the evaporation temperature at the evaporation temperature threshold. The second set of operating parameters includes the first set of transport parameters and the current evaporator fan speed.

[0014] Step 6: Control the air conditioning module to work according to the second set of operating parameters.

[0015] In order to enable the refrigerated range hood to quickly reach a good noise reduction state when operating the refrigeration function, the second set of operating parameters acquired each time is recorded and stored, and the noise value of the refrigerated range hood according to the second set of operating parameters for each set is detected and stored; thus forming a noise reduction operating parameter database for the air conditioning module.

[0016] When the cooling range hood is turned on for cooling, select the second set of operating parameters corresponding to the lowest noise value in the air conditioning module noise reduction operating parameter database to control the air conditioning module to work.

[0017] As an improvement, steps 1 to 6 are controlled according to the set working time cycle of the air conditioning module to obtain a new second set of operating parameters. At the same time, the noise value corresponding to the air conditioning module running according to the new second set of operating parameters is detected and obtained to refresh the stored second set of operating parameters database.

[0018] To further eliminate the noise impact caused by resonance, when the cooling range hood is in cooling mode, the vibration frequency f1 of the range hood fan and the vibration frequency f2 of the compressor are detected and obtained. The difference between f1 and f2 is compared. If the difference between f1 and f2 is within the set range, the speed of the range hood fan is reduced.

[0019] Preferably, the speed of the range hood is controlled to gradually decrease according to a set first speed step, until the difference between f1 and f2 exceeds the set difference range.

[0020] Preferably, in step 3, the initial operating parameters of the compressor speed, the evaporator fan speed, and the cooling fan speed are set to their respective maximum speed values.

[0021] As an improvement, in step 4, the speed of the cooling fan and the compressor are reduced until the condensing temperature is greater than the condensing temperature threshold. Then the speed of the cooling fan is increased until the condensing temperature drops to the condensing temperature threshold.

[0022] As an improvement, in step 4, the cooling fan speed is gradually reduced according to the set second speed step size, the compressor speed is gradually reduced according to the set third speed step size, and the cooling fan speed is gradually increased according to the set fourth speed step size.

[0023] As an improvement, in step 5, when the real-time evaporation temperature is greater than the evaporation temperature threshold, the speed of the evaporator fan is gradually reduced until the real-time evaporation temperature is less than or equal to the evaporation temperature threshold. Then, the speed of the evaporator fan is increased so that the evaporation temperature is greater than and closest to the evaporation temperature threshold.

[0024] As an improvement, in step 5, the speed of the evaporator fan is controlled and adjusted according to the set fifth speed step.

[0025] As an improvement, the condensing temperature threshold of the condenser and the evaporating temperature threshold of the evaporator are set according to the ambient temperature of the refrigerated range hood.

[0026] To reduce costs, the cooling fan is the same as the range hood fan, and the installation space of the compressor and condenser in the air conditioning module is connected to the oil fume duct of the range hood.

[0027] The technical solution adopted by the present invention to solve the second problem mentioned above is as follows: a range hood, including a housing, and a range hood fan and an air conditioning module disposed in the housing, characterized in that: it further includes a memory and a controller, the controller being electrically connected to the memory, the range hood fan and the air conditioning module, the memory storing a computer program, and when the computer program is read and executed by the controller, the noise reduction working method of the cooling range hood as described above is realized.

[0028] To facilitate modular installation and maintenance of the air conditioning module, the air conditioning module is located on one side of the range hood, and an opening is provided on the side wall of the range hood to connect the oil fume channel inside the range hood with the heat dissipation channel of the air conditioning module.

[0029] Preferably, the opening is located on the side wall of the fume extractor near the air conditioning module.

[0030] As an improvement, the opening is provided with an opening adjustment valve that allows for adjustment of the opening degree.

[0031] With a simple structure, the opening regulating valve includes a drive motor and a valve plate connected to the drive end of the drive motor. The drive motor drives the valve plate to control the opening degree by adjusting the angle of the valve plate relative to the plane of the opening.

[0032] In order to facilitate the entry of clean outside air into the air conditioning module for heat dissipation, a vent is provided on the housing corresponding to the inlet end of the heat dissipation channel of the air conditioning module.

[0033] To further improve the heat dissipation effect of the air conditioning module, an oil cup is provided below the oil extraction fan;

[0034] The air conditioning module includes

[0035] Evaporator;

[0036] An air outlet assembly is connected to the airflow channel outlet of the evaporator.

[0037] The first water receiving tray is located below the evaporator, and a drain hole is provided on the first water receiving tray;

[0038] The compressor is located below the first water collection tray;

[0039] The condenser is located below the first drip tray;

[0040] The second water tray is located below the compressor and condenser, and is connected to the oil cup via a water pipe.

[0041] The technical solution adopted by the present invention to solve the third problem mentioned above is: a storage medium storing a computer program, characterized in that: when the computer program is read and executed by a processor, it realizes the noise reduction working method of the aforementioned cooling range hood.

[0042] Compared with the prior art, the advantages of the present invention are as follows: the noise reduction method of the refrigerated range hood in the present invention reduces the overall noise of the refrigerated range hood and improves the user experience by controlling the speed of the cooling fan, compressor and evaporator fan.

[0043] The range hood that uses this noise reduction method can effectively improve the operating noise of the air conditioning module and enhance the user experience, based on the built-in air conditioning module. Attached Figure Description

[0044] Figure 1 This is a perspective view of the range hood in an embodiment of the present invention.

[0045] Figure 2 This is a diagram showing the internal structure of the range hood in an embodiment of the present invention.

[0046] Figure 3 This is a flowchart of the noise reduction method of the refrigerated range hood in an embodiment of the present invention. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0048] like Figure 1 and Figure 2 As shown, the range hood in this embodiment includes a housing 1, a range hood fan 2 and an air conditioning module 3 disposed in the housing 1. The range hood also includes a memory and a controller. The controller is electrically connected to the memory, the range hood fan 2 and the air conditioning module 3. The memory stores a computer program. When the computer program is read and executed by the controller, the noise reduction method of the cooling range hood is implemented as described below.

[0049] The casing 1 can adopt the casing structure of various existing range hoods. The specific structure of the casing 1 is determined based on the specific application environment. For example, the casing 1 can be an additional decorative cover or a cabinet in the user's home.

[0050] The range hood 2 includes a housing and a fan installed inside the housing. The housing has a fume duct, which, under the action of the fan, can exhaust the sucked-up fumes into a common flue. In addition, an oil cup 4 is usually installed below the range hood 2 to collect condensed oil.

[0051] The air conditioning module 3 can adopt the existing air conditioning structure. In this embodiment, the air conditioning module 3 includes basic components such as evaporator 31, air outlet assembly 32, compressor 34, and condenser 35, as well as a first water receiving tray 33 and a second water receiving tray 36.

[0052] The air outlet assembly 32 is connected to the airflow channel outlet of the evaporator 31, meaning the airflow output by the air conditioner is discharged to the range hood's operating environment via the air outlet assembly 32. To effectively adjust the airflow direction, the air outlet assembly 32 includes a frame and a guide assembly rotatably mounted within the frame to adjust the airflow direction. This guide assembly, similar to existing technologies, may include a first set of blades capable of vertical oscillation and a second set of blades capable of horizontal oscillation. Drive mechanisms are provided corresponding to the first and second sets of blades, thereby driving the first set of blades vertically and the second set of blades horizontally, thus adjusting the airflow direction of the air conditioning module 3 in both vertical and horizontal directions. The connections between the evaporator 31, compressor 34, and condenser 35 are the same as in existing technologies.

[0053] When the air conditioning module 3 is working, it will inevitably generate heat, thus facing the problem of heat dissipation. In this embodiment, the first water receiving tray 33 is located below the evaporator 31, and a drain hole is provided on the first water receiving tray 33. The compressor 34 and condenser 35 are located below the first water receiving tray 33, and the second water receiving tray 36 is located below the compressor 34 and condenser 35. The second water receiving tray 36 is connected to the oil cup 4 through a water pipe. When the air conditioning module 3 is working, the first water receiving tray 33 is used to collect the condensate produced by the evaporator 31. The condensate produced by the evaporator 31 will flow into the first water receiving tray 33 by gravity. The drain hole on the first water receiving tray 33 can be positioned above the condenser 35 and compressor 34. In this way, the water on the first water receiving tray 33 of the evaporator 31 will flow into the condenser 35 and compressor 34 by gravity through the drain hole, thus drenching and cooling the condenser 35 and compressor 34. The water that is not evaporated will flow onto the second water receiving tray 36 and then into the oil cup 4 through a water pipe. Based on this structure, auxiliary heat dissipation can be provided for the air conditioning module 3, which can improve the heat dissipation effect of the air conditioning module 3 and ensure that the air conditioning module 3 can perform reliable cooling work for a long time.

[0054] In addition, to effectively dissipate heat, a cooling fan can be additionally installed inside the casing 1 to dissipate heat from the compressor 34 and condenser 35, thus performing the main heat dissipation work of the air conditioning module 3. However, to effectively dissipate heat from the air conditioning module 3 without setting up an additional heat dissipation mechanism, this embodiment directly uses the range hood fan 2 as the cooling fan to dissipate heat from the air conditioning module 3, which is both low-cost and compact.

[0055] Specifically, the air conditioning module 3 is positioned on one side of the range hood 2. This placement of the air conditioning module 3 relative to the range hood 2 facilitates module installation, allowing users to selectively install it as needed, and also facilitates maintenance. To allow clean outside air to enter the air conditioning module 3 for heat dissipation, a vent 11 is provided on the housing 1 corresponding to the inlet of the heat dissipation channel of the air conditioning module 3. An opening 21 is provided on the side wall of the range hood 2 near the air conditioning module 3 to connect the oil fume channel inside the range hood 2 with the heat dissipation channel of the air conditioning module 3. The condenser 35 heat dissipation duct of the air conditioning module 3 is connected to this opening 21. When the range hood 2 operates, it draws air from the vent 11 through the compressor 34 and condenser 35, cooling them. The large airflow and pressure of the range hood 2 ensures effective heat dissipation for the condenser 35. This also eliminates the need for a dedicated condenser 35 cooling fan as in traditional air conditioning systems, resulting in lower costs. By introducing clean air from the range hood's operating environment through the vent 11, heat is dissipated from the condenser 35, extending the service life of the condenser 35 and ensuring the cleanliness of the cold air, thereby guaranteeing the air quality in the kitchen.

[0056] If the opening 21 connecting the oil fume duct inside the range hood 2 and the heat dissipation duct of the air conditioning module 3 is not adjusted, it may affect the internal air pressure of the range hood 2. In this embodiment, an opening adjustment valve 22 is provided on the opening 21 to adjust the opening degree of the opening 21. The opening degree of the opening 21 is adjusted by the opening adjustment valve 22, and the opening degree adjustment by the valve plate 222 is used to improve the airflow state inside the range hood 2, so that the range hood 2 can better absorb and exhaust oil fumes. On the other hand, the valve plate 222 has a certain opening and closing angle to limit the size of the opening 21 on the side plate of the range hood 2, preventing the air pressure inside the range hood 2 from leaking and affecting the smoke extraction effect of the range hood. At the same time, the valve plate 222 can also adjust the flow rate of the heat dissipation medium flowing through the compressor 34 and the condenser 35, ensuring the internal air pressure of the range hood 2 while meeting the heat dissipation requirements of the condenser 35. With a simple structure, the opening regulating valve 22 includes a drive motor 221 and a valve plate 222 connected to the drive end of the drive motor 221. The drive motor 221 drives the valve plate 222 to control the opening degree of the opening 21 by adjusting the angle of the valve plate 222 relative to the plane of the opening 21. Furthermore, by adjusting the opening degree of the valve plate 222, the air conditioning module 3 can work independently or simultaneously with the range hood, expanding the applicable scenarios for the cooling function. For example, the air conditioning module 3 can be used independently for cooling without turning on the range hood 2 for fume extraction. Alternatively, the range hood 2 and the air conditioning module 3 can be turned on simultaneously for independent cooling or simultaneous fume extraction and cooling. Users can choose to turn on the cooling function before or during cooking according to their personal preferences.

[0057] The aforementioned range hood with air conditioning module 3 can also be called a cooling range hood because it can perform cooling operation. Of course, the aforementioned range hood with air conditioning module 3 can also perform heating operation.

[0058] In this embodiment, the range hood employs the following noise reduction method for cooling. The noise generated during operation mainly includes the noise from the range hood fan 2, the compressor 34, and the evaporator fan 31. This noise reduction method, while meeting the cooling effect of the air conditioning module 3 and the heat dissipation of the condenser 35, reduces noise by adjusting the speeds of the range hood fan 2, the compressor 34, and the evaporator fan 31, thereby improving the user experience.

[0059] Specifically, in this noise reduction method for a refrigerated range hood, the refrigerated range hood can be the aforementioned type, i.e., it has a built-in air conditioning module 3. The air conditioning module 3 includes a compressor 34, a condenser 35, and an evaporator 31. The range hood also has a built-in cooling fan for dissipating heat from the compressor 34 and the condenser 35. Of course, this cooling fan can be a separately installed cooling fan, or the range hood fan 2 can be used as the cooling fan.

[0060] like Figure 3 As shown, the noise reduction method of a refrigerated range hood includes the following steps.

[0061] Step 1: Turn on the cooling function of the range hood.

[0062] Step 2: Control the compressor 34 speed, evaporator 31 fan speed, and cooling fan speed in the air conditioning module 3 to operate according to the initial operating parameters. These initial operating parameters are set as needed; typically, larger parameters are set to ensure effective smoke extraction and cooling. In this embodiment, the initial operating parameters for the compressor 34 speed, evaporator 31 fan speed, and cooling fan speed are their respective maximum speed values.

[0063] Step 3: To perform cooling control of the air conditioning module 3, it is necessary to set the condensing temperature threshold and the evaporating temperature threshold, and then complete the cooling control based on the control of the condensing temperature and the evaporating temperature. In this embodiment, the condensing temperature threshold of the condenser 35 and the evaporating temperature threshold of the evaporator 31 are initialized according to the ambient temperature of the range hood. That is, the ambient temperature T0 of the range hood is detected by the temperature sensor, and the condensing temperature threshold of the condenser 35 is initialized accordingly as Tn0 = T0 + a, where a is determined according to the specific experiment. In this embodiment, a = 20℃, that is, the condensing temperature threshold Tn0 is T0 + a20℃. The evaporating temperature threshold Tz0 of the evaporator 31 is initialized as Tz0 = T0 - b, where b is determined according to the specific experiment. In this embodiment, b = 20℃, that is, the evaporating temperature threshold Tz0 is T0 - 20℃.

[0064] The condensing temperature Tn of the condenser 35 and the evaporating temperature Tz of the evaporator 31 are monitored in real time. Specifically, the condensing temperature and evaporating temperature can be obtained by installing sensors in the condenser 35 and evaporator 31 that are capable of detecting the corresponding data in the prior art.

[0065] Step 4: Based on the comparison between the real-time condensing temperature and the set condensing temperature threshold, control and adjust the speed of the cooling fan and the speed of the compressor 34 to obtain the first set of operating parameters that can stabilize the condensing temperature at the condensing temperature threshold. The first set of operating parameters includes the current speed of the cooling fan and the speed of the compressor 34.

[0066] The condensing temperature of condenser 35 is crucial to the cooling performance of air conditioning module 3. Intelligent temperature control of condenser 35 ensures optimal cooling. A high condensing temperature leads to higher pressure in air conditioning module 3, resulting in reduced cooling efficiency. Increased condensing temperature also raises the discharge temperature of compressor 34, increasing its compression ratio and reducing its delivery coefficient, thus decreasing its cooling capacity and increasing power consumption.

[0067] Based on this working principle, in this embodiment, according to the comparison between the real-time condensing temperature and the set condensing temperature threshold, the speed of the cooling fan and the compressor 34 are controlled to decrease until the condensing temperature is greater than the condensing temperature threshold. Then, the speed of the cooling fan is increased until the condensing temperature drops back to the condensing temperature threshold. Specifically, when Tn ≤ Tn0, the speed of the range hood 2 is first controlled to decrease according to the set second speed step, and then it is determined whether Tn ≤ Tn0. If Tn ≤ Tn0, the speed of the compressor 34 is controlled to decrease according to the set third speed step, and then it is determined whether Tn ≤ Tn0 again. If Tn ≤ Tn0, the speed of the range hood 2 is controlled to decrease according to the set second speed step, and so on, cyclically controlling the decrease of the speed of the range hood 2 and the compressor 34 until Tn > Tn0. When Tn > Tn0, the speed of the cooling fan is gradually increased according to the set fourth speed step until Tn ≤ Tn0. Thus, a first set of operating parameters is obtained that can stabilize the condensing temperature at the condensing temperature threshold. This first set of operating parameters includes the current cooling fan speed and the compressor speed of 34.

[0068] Step 5: Based on the comparison between the real-time evaporation temperature and the set evaporation temperature threshold, control and adjust the speed of the evaporator 31 fan to obtain a second set of operating parameters that can stabilize the evaporation temperature at the evaporation temperature threshold. This second set of operating parameters includes the first set of transport parameters and the current evaporator 31 fan speed. Specifically, when the real-time evaporation temperature is greater than the evaporation temperature threshold, the speed of the evaporator 31 fan is reduced according to a set fifth speed step size until the real-time evaporation temperature is less than or equal to the evaporation temperature threshold. Then, the speed of the evaporator 31 fan is increased according to a set fifth speed step size, so that the evaporation temperature is greater than and closest to the evaporation temperature threshold. This obtains the evaporator 31 fan speed. Based on the aforementioned first set of operating parameters, the second set of operating parameters is then obtained.

[0069] Step 6: Control the air conditioning module 3 to work according to the second set of operating parameters.

[0070] The system records and stores the second set of operating parameters acquired each time, and detects and stores the noise value corresponding to each set of second operating parameters for the refrigeration range hood, thus forming a noise reduction operating parameter database for air conditioning module 3. This database can be directly used by the refrigeration range hood when operating its cooling function. Specifically, when the refrigeration range hood starts its cooling operation, it selects the second set of operating parameters corresponding to the lowest noise value in the noise reduction operating parameter database of air conditioning module 3 to control the operation of air conditioning module 3. That is, based on the noise reduction operating parameter database of air conditioning module 3, the range hood does not need to go through steps 1 to 6 mentioned above to obtain the second set of operating parameters every time it operates in cooling mode. Instead, it directly uses the second set of operating parameters corresponding to the lowest noise value in the noise reduction operating parameter database of air conditioning module 3 to operate, which can quickly achieve a good noise reduction working state.

[0071] However, as the range hood is used, its operating conditions will change to some extent. Therefore, in order to maintain the best noise reduction working state for a long time when the cooling function is running, steps 1 to 6 are controlled according to the set working time cycle of the air conditioning module 3 to obtain the new second set of operating parameters. At the same time, the noise value corresponding to the air conditioning module 3 running according to the new second set of operating parameters is detected and obtained to refresh the stored second set of operating parameter database.

[0072] In addition, the range hood fan itself generates vibration noise during operation. Combined with the refrigeration compressor 34, this can produce resonance noise under certain operating conditions. To further eliminate the noise impact of resonance, when the refrigeration range hood is in cooling mode, the vibration frequency f1 of the range hood fan 2 and the vibration frequency f2 of the compressor 34 are detected and acquired. F1 and f2 are compared. If the difference between f1 and f2 is within a set range, the speed of the range hood fan 2 is controlled to decrease. Specifically, the speed of the range hood fan 2 is gradually reduced according to a set first speed step until the difference between f1 and f2 exceeds the set range.

[0073] The present invention also relates to a storage medium storing a computer program, which, when read and executed by a processor, implements the noise reduction method of the aforementioned cooling range hood.

[0074] The noise reduction method of the refrigerated range hood in this invention reduces the overall noise of the range hood while maintaining the cooling effect by controlling the rotational speeds of the cooling fan, compressor 34, and evaporator 31 fan, thus improving the user experience. Furthermore, the range hood using this noise reduction method, based on the built-in air conditioning module 3, effectively reduces the operating noise of the air conditioning module 3, further enhancing the user experience.

[0075] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A method for noise reduction in a refrigerated range hood, wherein the refrigerated range hood has a built-in air conditioning module (3), the air conditioning module (3) includes a compressor (34), a condenser (35), and an evaporator (31), and the range hood also has a built-in cooling fan for cooling the compressor (34) and the condenser (35), characterized in that: Includes the following steps: Step 1: Turn on the cooling function of the range hood; Step 2: Control the compressor (34) speed, evaporator (31) fan speed and cooling fan speed in the air conditioning module (3) to work according to the initial working parameters; The initial operating parameters of the compressor (34) speed, the evaporator (31) fan speed, and the cooling fan speed are set to their respective maximum speed values. Step 3: Monitor the condensation temperature and evaporation temperature in real time; Step 4: Based on the comparison between the real-time condensing temperature and the set condensing temperature threshold, control the cooling fan speed and compressor (34) speed to decrease until the condensing temperature is greater than the condensing temperature threshold. Then increase the cooling fan speed until the condensing temperature drops to the condensing temperature threshold. In this way, obtain the first set of operating parameters that can stabilize the condensing temperature at the condensing temperature threshold. The first set of operating parameters includes the current cooling fan speed and compressor (34) speed. Step 5: Based on the comparison between the real-time evaporation temperature and the set evaporation temperature threshold, control and adjust the speed of the evaporator (31) fan to obtain a second set of operating parameters that can stabilize the evaporation temperature at the evaporation temperature threshold. The second set of operating parameters includes the first set of transport parameters and the current evaporator (31) fan speed. When the real-time evaporation temperature is greater than the evaporation temperature threshold, control and gradually reduce the speed of the evaporator (31) fan until the real-time evaporation temperature is less than or equal to the evaporation temperature threshold. Then control and increase the speed of the evaporator (31) fan so that the evaporation temperature is greater than and closest to the evaporation temperature threshold. Step 6: Control the air conditioning module (3) to work according to the second set of operating parameters.

2. The noise reduction method for a refrigerated range hood according to claim 1, characterized in that: Record and store the second set of operating parameters acquired each time, and detect and store the noise value of the refrigeration range hood according to the second set of operating parameters for each set; thereby forming a noise reduction operating parameter database for the air conditioning module (3); When the cooling range hood is turned on for cooling, the second set of operating parameters corresponding to the lowest noise value in the noise reduction operating parameter database of the air conditioning module (3) is selected to control the operation of the air conditioning module (3).

3. The noise reduction method for a refrigerated range hood according to claim 2, characterized in that: According to the set working time cycle of the air conditioning module (3), the control performs steps 1 to 6 to obtain new second set of operating parameters, and at the same time detects and obtains the noise value corresponding to the operation of the air conditioning module (3) according to the new second set of operating parameters, so as to refresh the stored second set of operating parameter database.

4. The noise reduction method for a refrigerated range hood according to any one of claims 1 to 3, characterized in that: When the refrigerated range hood is in refrigeration operation, the vibration frequency f1 of the range hood fan (2) and the vibration frequency f2 of the compressor (34) are detected and obtained. The difference between f1 and f2 is compared. If the difference between f1 and f2 is within the set difference range, the speed of the range hood fan (2) is reduced.

5. The noise reduction method for a refrigerated range hood according to claim 4, characterized in that: The speed of the fume extractor (2) is controlled to gradually decrease according to the first speed step size until the difference between f1 and f2 exceeds the set difference range.

6. The noise reduction method for a refrigerated range hood according to any one of claims 1 to 3, characterized in that: In step 4, the speed of the cooling fan is gradually reduced according to the set second speed step size, the speed of the compressor (34) is gradually reduced according to the set third speed step size, and the speed of the cooling fan is gradually increased according to the set fourth speed step size.

7. The noise reduction method for a refrigerated range hood according to any one of claims 1 to 3, characterized in that: In step 5, the speed of the evaporator (31) fan is controlled and adjusted according to the set fifth speed step.

8. The noise reduction method for a refrigerated range hood according to any one of claims 1 to 3, characterized in that: The condensing temperature threshold of the condenser (35) and the evaporating temperature threshold of the evaporator (31) are set according to the ambient temperature of the refrigerated range hood.

9. The noise reduction method for a refrigerated range hood according to any one of claims 1 to 3, characterized in that: The cooling fan is the smoke fan of the range hood, and the installation space of the compressor (34) and condenser (35) in the air conditioning module (3) is connected to the oil fume channel of the range hood.

10. A range hood, comprising a housing (1), and a range hood fan (2) and an air conditioning module (3) disposed within the housing (1), characterized in that: It also includes a memory and a controller. The controller is electrically connected to the memory, the range hood fan (2), and the air conditioning module (3). The memory stores a computer program. When the computer program is read and executed by the controller, it implements the noise reduction method of the refrigerated range hood as described in any one of claims 1 to 9.

11. The range hood according to claim 10, characterized in that: The air conditioning module (3) is located on one side of the fume extractor (2), and the side wall of the fume extractor (2) has an opening (21) for connecting the fume duct inside the fume extractor (2) with the heat dissipation duct of the air conditioning module (3).

12. The range hood according to claim 11, characterized in that: The opening (21) is located on the side wall of the fume extractor (2) near the air conditioning module (3).

13. The range hood according to claim 11, characterized in that: The opening (21) is provided with an opening adjustment valve (22) that can adjust the opening degree of the opening (21).

14. The range hood according to claim 13, characterized in that: The opening adjustment valve (22) includes a drive motor (221) and a valve plate (222) connected to the drive end of the drive motor (221). The drive motor (221) drives the valve plate (222) to control the opening of the opening (21) by adjusting the angle of the valve plate (222) relative to the plane of the opening (21).

15. The range hood according to claim 10, characterized in that: The housing (1) is provided with a vent (11) at the inlet end of the heat dissipation channel corresponding to the air conditioning module (3).

16. The range hood according to claim 10, characterized in that: An oil cup (4) is provided below the oil extraction fan (2); The air conditioning module (3) includes Evaporator (31); An air outlet assembly (32) is connected to the airflow channel outlet disposed on the evaporator (31); The first water receiving tray (33) is located below the evaporator (31), and a water leakage hole is provided on the first water receiving tray (33); The compressor (34) is located below the first water receiving tray (33); A condenser (35) is located below the first water receiving tray (33); The second water tray (36) is located below the compressor (34) and condenser (35), and the second water tray (36) is connected to the oil cup (4) through a water pipe.

17. A storage medium storing a computer program, characterized in that: When the computer program is read and executed by the processor, it implements the noise reduction method of the refrigerated range hood as described in any one of claims 1 to 9.

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