A range hood system

Abstract

This invention discloses a range hood system, comprising: a range hood and a temperature detection device, a humidity detection device, and an air pressure detection device connected to the range hood. The range hood includes a motor. The temperature detection device acquires a first indoor temperature, the humidity detection device acquires a first indoor humidity, and the air pressure detection device acquires a first indoor air pressure. The range hood determines a corresponding first outlet pressure based on the first indoor temperature, the first indoor humidity, the first indoor air pressure, a first motor speed, and an outlet pressure model, and adjusts the motor speed according to the first outlet pressure. The outlet pressure model is a functional relationship between a temperature setpoint T, a humidity setpoint X, an air pressure setpoint Ps, a motor speed setpoint R, and an outlet pressure setpoint P. This invention improves the accuracy of speed adjustment.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and more particularly to a range hood system. Background Technology

[0002] Among existing kitchen appliances, range hoods have become an essential appliance in most family kitchens. When cooking, the range hood can effectively remove cooking fumes from the kitchen environment, keeping the air clean in the kitchen and even the entire indoor environment, which is beneficial to the user's health.

[0003] Currently, the main function of range hoods is to adjust the speed of the range hood according to the stove setting. However, there may be problems such as inaccurate speed adjustment, leading to the accumulation of oil fumes. Summary of the Invention

[0004] This invention provides a range hood system to solve the problem of inaccurate range hood speed adjustment.

[0005] This invention provides a range hood system, including: a range hood and a temperature detection device, a humidity detection device, and an air pressure detection device connected to the range hood, wherein the range hood includes a motor;

[0006] The temperature detection device is used to obtain the first indoor temperature, the humidity detection device is used to obtain the first indoor humidity, and the air pressure detection device is used to obtain the first indoor air pressure.

[0007] The range hood is used to determine the corresponding first outlet pressure based on the first indoor temperature, the first indoor humidity, the first indoor air pressure, the first motor speed of the motor, and the outlet pressure model, and to adjust the motor speed according to the first outlet pressure. The outlet pressure model is a functional relationship between the temperature setpoint T, the humidity setpoint X, the air pressure setpoint Ps, the motor speed setpoint R, and the outlet pressure setpoint P.

[0008] Furthermore, the outlet pressure model is P=P(T, X, Ps, R, K), where K is a constant for range hoods with different air inlets and outlets.

[0009] Furthermore, the range hood is used to calculate the outlet pressure setting value under the i-th temperature setting value, j-th humidity setting value, m-th air pressure setting value and n-th speed setting value under experimental conditions, so as to construct the outlet pressure model, where i, j, m and n are all positive integers;

[0010] In the outlet pressure model, the temperature parameter includes temperature setpoints from the 1st to the Ath, the humidity parameter includes humidity setpoints from the 1st to the Bth, the air pressure parameter includes air pressure setpoints from the 1st to the Cth, and the rotation speed parameter includes rotation speed setpoints from the 1st to the Dth. A, B, C, and D are all positive integers greater than or equal to 2.

[0011] 1≤i≤A, 1≤j≤B, 1≤m≤C, 1≤n≤D.

[0012] Furthermore, the range hood is used to determine the first temperature setting value corresponding to the first indoor temperature, the first humidity setting value corresponding to the first indoor humidity, the first air pressure setting value corresponding to the first indoor air pressure, and the first speed setting value corresponding to the first motor speed. It also finds the outlet pressure setting value corresponding to the first temperature setting value, the first humidity setting value, the first air pressure setting value, and the first speed setting value from the outlet pressure model. This outlet pressure setting value is the first outlet pressure.

[0013] Furthermore, Y / S ≤ 0.5,

[0014] Y represents the absolute value of the difference between the first indoor temperature and the first temperature setpoint, S represents the absolute value of the difference between the first temperature setpoint and the adjacent temperature setpoint, and the first indoor temperature is located within the temperature range from the first temperature setpoint to the adjacent temperature setpoint; or...

[0015] Y represents the absolute value of the difference between the first indoor humidity and the first humidity setting value, S represents the absolute value of the difference between the first humidity setting value and the adjacent humidity setting value, and the first indoor humidity is located within the humidity range from the first humidity setting value to the adjacent humidity setting value; or...

[0016] Y represents the absolute value of the difference between the first indoor air pressure and the first air pressure setpoint, S represents the absolute value of the difference between the first air pressure setpoint and the adjacent air pressure setpoint, and the first indoor air pressure is located within the air pressure range from the first air pressure setpoint to the adjacent air pressure setpoint; or...

[0017] Y is the absolute value of the difference between the first motor speed and the first speed setting value, S is the absolute value of the difference between the first speed setting value and the adjacent speed setting value, and the first motor speed is located within the speed range from the first speed setting value to the adjacent speed setting value.

[0018] Furthermore, the range hood is used to calculate the first outlet pressure P. Q Compared to the default outlet pressure value P of the current gear z The first correlation value P M1 The motor speed is adjusted according to the speed regulation rule corresponding to the first associated value;

[0019] P M1 =(P Q -P z ) / P z .

[0020] Furthermore, 0 < P M1 ≤0.1, the motor speed is increased by 5% based on the default speed of the current gear.

[0021] 0.1 < P M1 ≤0.2, the motor speed is increased by 10% based on the default speed of the current gear, ...,

[0022] 0.9 < P M1 ≤1, the motor speed is increased by 50% based on the default speed of the current gear.

[0023] P M1 >1, upgrade gear or issue a gear upgrade notification.

[0024] Furthermore, the range hood is also used to adjust the motor speed according to the first outlet pressure and the indoor temperature when the indoor temperature is higher than the preset reference temperature.

[0025] Furthermore, T M1 The difference between the indoor temperature and the preset reference temperature;

[0026] 0 < T M1 ≤1, the motor speed is increased by 3% based on the default speed of the current gear.

[0027] 1 < T M1 ≤2, the motor speed is increased by 6% based on the default speed of the current gear, ...

[0028] 16 < T M1 ≤17, the motor speed is increased by 51% based on the default speed of the current gear.

[0029] Furthermore, T M1 >17, issue a cooling notification.

[0030] In this embodiment of the invention, the temperature detection device, humidity detection device, and air pressure detection device are installed at a certain distance from the range hood. This reduces the damage and signal impact of the high-concentration and high-temperature fumes from the range hood on these devices, thereby improving their accuracy and lifespan. The range hood calculates the corresponding first outlet pressure based on a model of the first indoor temperature, first indoor humidity, first indoor air pressure, first motor speed, and outlet pressure. The motor speed is then adjusted according to this first outlet pressure. Since the outlet pressure takes into account the influence of current kitchen environmental factors, adjusting the speed accordingly improves the accuracy of speed regulation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, although the drawings described below are some specific embodiments of the present invention, those skilled in the art can extend and extend the basic concepts of the device structure, driving method and manufacturing method disclosed and indicated by various embodiments of the present invention to other structures and drawings. Undoubtedly, these should all be within the scope of the claims of the present invention.

[0032] Figure 1 This is a schematic diagram of a range hood system provided in an embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the basic concepts disclosed and indicated in the embodiments of this invention, all other embodiments obtained by those skilled in the art are within the scope of protection of this invention.

[0034] refer to Figure 1The diagram shown is a schematic of a range hood system provided in an embodiment of the present invention. The range hood system provided in this embodiment includes: a range hood 10 and a temperature detection device 20, a humidity detection device 30, and an air pressure detection device 40 connected to the range hood 10. The range hood 10 includes a motor 11. The temperature detection device 20 is used to acquire a first indoor temperature, the humidity detection device 30 is used to acquire a first indoor humidity, and the air pressure detection device 40 is used to acquire a first indoor air pressure. The range hood 10 is used to determine a corresponding first outlet pressure based on the first indoor temperature, the first indoor humidity, the first indoor air pressure, the first motor speed of the motor 11, and an outlet pressure model, and to adjust the motor speed according to the first outlet pressure. The outlet pressure model is a functional relationship between a temperature setpoint T, a humidity setpoint X, an air pressure setpoint Ps, a motor speed setpoint R, and an outlet pressure setpoint P.

[0035] In this embodiment, the optional range hood 10 is usually located in the kitchen environment, but it is not limited to this. In this embodiment, the indoor environment is described using the kitchen where the range hood is located as an example.

[0036] Temperature detection device 20, humidity detection device 30, and air pressure detection device 40 are all installed in the kitchen, at a certain distance from the range hood 10. This reduces the damage to temperature detection device 20, humidity detection device 30, and air pressure detection device 40 caused by the high concentration and high temperature fumes from the range hood 10, and also reduces the impact of these fumes on the signals collected by the range hood 10, thereby improving the accuracy and lifespan of the temperature detection device 20, humidity detection device 30, and air pressure detection device 40.

[0037] Optional temperature detection device 20, humidity detection device 30, and air pressure detection device 40 can be wirelessly connected to the range hood 10. For example, wireless Bluetooth linkage can be used, in which case the temperature detection device 20, humidity detection device 30, air pressure detection device 40, and range hood 10 all integrate Bluetooth modules, enabling Bluetooth communication. Alternatively, wireless WiFi linkage can be used, in which case the temperature detection device 20, humidity detection device 30, air pressure detection device 40, and range hood 10 all integrate WiFi modules, enabling wireless communication. Wireless connection is not limited to Bluetooth linkage or WiFi linkage.

[0038] The temperature detection device 20 also integrates a temperature sensor and other related temperature detection devices to obtain the first indoor temperature, which can be understood as the actual indoor temperature at the current moment. The humidity detection device 30 also integrates a humidity sensor and other related humidity detection devices to obtain the first indoor humidity, which can be understood as the actual indoor humidity at the current moment. The air pressure detection device 40 also integrates an air pressure sensor and other related air pressure detection devices to obtain the first indoor air pressure, which can be understood as the actual indoor air pressure at the current moment.

[0039] The range hood 10 integrates a motor 11, which rotates when the range hood 10 is running. It can be understood that the first motor speed is the actual motor speed at the current moment. During the initial startup of the range hood 10, the first motor speed is the default motor speed for the current setting. For example, if the user starts the range hood 10 and adjusts it to a low speed setting, the range hood 10 stores the first preset motor speed corresponding to the low speed setting; therefore, the first motor speed at this time is the first preset motor speed corresponding to the low speed setting. If the motor speed is subsequently adjusted, then the first motor speed becomes the actual motor speed at the current moment.

[0040] The range hood 10 acquires the first indoor temperature through the temperature detection device 20, the first indoor humidity through the humidity detection device 30, and the first indoor air pressure through the air pressure detection device 40, and also collects the first motor speed of the motor 11. The range hood 10 also incorporates an outlet pressure model, which represents a functional relationship between the temperature setpoint T, humidity setpoint X, air pressure setpoint Ps, motor speed setpoint R, and outlet pressure setpoint P. Based on this outlet pressure model, the range hood 10 can calculate the first outlet pressure corresponding to the first indoor temperature, first indoor humidity, first indoor air pressure, and first motor speed. This first outlet pressure, derived by combining multiple parameters under the current kitchen environment, is more accurate. By adjusting the motor speed according to the first outlet pressure, the range hood 10 can improve the accuracy and precision of speed regulation.

[0041] It is understandable that the range hood 10 has a main control device, which is equivalent to the intelligent processing center of the range hood 10 and is used to control the intelligent operation of the range hood 10.

[0042] An optional outlet pressure model is P = P(T, X, Ps, R, K), where K is a constant for range hoods with different air inlets and outlets. In this embodiment, the outlet pressure model also includes an experimentally measured constant K related to the range hood itself. K represents a constant for range hoods with different air inlets and outlets, and is related to the effective air inlet area and effective air outlet area of ​​the range hood. It can be understood that the constant K of the range hood can be measured in a laboratory environment, and the constant K of the same model of range hood obtained from the same production line is the same, while the constant K of different models of range hoods may be different.

[0043] In this embodiment of the invention, the temperature detection device, humidity detection device, and air pressure detection device are installed at a certain distance from the range hood. This reduces the damage and signal impact of the high-concentration and high-temperature fumes from the range hood on these devices, thereby improving their accuracy and lifespan. The range hood calculates the corresponding first outlet pressure based on a model of the first indoor temperature, first indoor humidity, first indoor air pressure, first motor speed, and outlet pressure. The motor speed is then adjusted according to this first outlet pressure. Since the outlet pressure takes into account the influence of current kitchen environmental factors, adjusting the speed accordingly improves the accuracy of speed regulation.

[0044] The optional range hood is used to calculate the outlet pressure setting value under the i-th temperature setting value, j-th humidity setting value, m-th air pressure setting value, and n-th speed setting value in an experimental environment, so as to construct an outlet pressure model, where i, j, m, and n are all positive integers; wherein, in the outlet pressure model, the temperature parameter includes the 1st to A-th temperature setting values, the humidity parameter includes the 1st to B-th humidity setting values, the air pressure parameter includes the 1st to C-th air pressure setting values, and the speed parameter includes the 1st to D-th speed setting values, where A, B, C, and D are all positive integers greater than or equal to 2; 1≤i≤A, 1≤j≤B, 1≤m≤C, 1≤n≤D.

[0045] In this embodiment, the range hood is placed in a laboratory, and the indoor temperature T, indoor air pressure Ps, indoor humidity X, and motor speed R are collected under the laboratory environment. The constant K related to the range hood itself under the laboratory environment is also measured. Based on this, a functional relationship P=P(T, X, Ps, R, K) between the five parameters and the outlet pressure P is constructed.

[0046] The selectable temperature parameters include temperature settings from 1 to A, where A=51. The temperature settings from 1 to A are -10℃, -9℃, ..., 0℃, 1℃, 2℃, ..., 39℃, and 40℃, respectively.

[0047] The selectable humidity parameters include humidity settings from 1 to B, where B=8, and the humidity settings from 1 to B are 10%, 20%, ..., 70%, 80% respectively.

[0048] The selectable air pressure parameters include air pressure settings from 1 to C, where C=3. The air pressure settings from 1 to C are 101325Pa, 95457Pa, and 89948Pa, respectively. The air pressure setting of 101325Pa corresponds to an altitude of 0 meters, the air pressure setting of 95457Pa corresponds to an altitude of 500 meters, and the air pressure setting of 89948Pa corresponds to an altitude of 1000 meters.

[0049] The selectable speed parameters include speed settings from 1 to D, where D=8, and the speed settings from 1 to D are 100 rpm, 200 rpm, ..., 800 rpm respectively.

[0050] In the above outlet pressure model, the values ​​and ranges of temperature, humidity, air pressure, and rotational speed parameters are merely examples and are not limited to these. For example, A, B, C, and D can also be selected with other values.

[0051] The principle of constructing an outlet pressure model for a range hood under experimental conditions is as follows: K is a measured constant. In the first process, three parameters among T, X, Ps, and R in the laboratory environment are kept constant. The remaining parameter is used to change the laboratory environment according to its multiple parameter settings, and multiple outlet pressure settings are measured. In the second process, three parameters among T, X, Ps, and R in the laboratory environment are kept constant. The remaining parameter (different from the variable parameter in the first process) is used to change the laboratory environment according to its multiple parameter settings, and multiple outlet pressure settings are measured. This process continues, adjusting the laboratory environment parameters T, X, Ps, and the motor speed R to obtain the functional relationship P=P(T, X, Ps, R, K) between T, X, Ps, R, K, and P.

[0052] The specific process is as follows: Inside the laboratory...

[0053] When the ambient humidity is 10%, the ambient air pressure is 101325Pa, and the motor speed is 100 rpm, the temperature parameters of the laboratory are adjusted sequentially to -10℃, -9℃, ..., 0℃, 1℃, 2℃, ..., 39℃, 40℃, and 51 outlet pressure setpoints P and the functional relationship P=P(T, X, Ps, R, K) are obtained by measuring the range hood.

[0054] When the ambient humidity is 20%, the ambient air pressure is 101325Pa, and the motor speed is 100 rpm, the temperature parameters of the laboratory are adjusted sequentially to -10℃, -9℃, ..., 0℃, 1℃, 2℃, ..., 39℃, 40℃, and 51 outlet pressure setpoints P and the functional relationship P=P(T, X, Ps, R, K) are obtained by measuring the range hood.

[0055] ...;

[0056] When the ambient humidity is 80%, the ambient air pressure is 101325Pa, and the motor speed is 100 rpm, the temperature parameters of the laboratory are adjusted sequentially to -10℃, -9℃, ..., 0℃, 1℃, 2℃, ..., 39℃, 40℃. The corresponding measurements of the range hood yield 51 outlet pressure setpoints P and the functional relationship P=P(T, X, Ps, R, K).

[0057] When the ambient humidity is 10%, the ambient air pressure is 95457Pa, and the motor speed is 100 rpm, the temperature parameters of the laboratory are adjusted sequentially to -10℃, -9℃, ..., 0℃, 1℃, 2℃, ..., 39℃, 40℃, and 51 outlet pressure setpoints P and the functional relationship P=P(T, X, Ps, R, K) are obtained by measuring the range hood.

[0058] ...;

[0059] When the ambient humidity is 80%, the ambient air pressure is 95457Pa, and the motor speed is 100 rpm, the temperature parameters of the laboratory are adjusted sequentially to -10℃, -9℃, ..., 0℃, 1℃, 2℃, ..., 39℃, and 40℃. The corresponding measurements of the range hood yield 51 outlet pressure setpoints P and the functional relationship P=P(T, X, Ps, R, K).

[0060] When the ambient humidity is 10%, the ambient air pressure is 89948Pa, and the motor speed is 100 rpm, the temperature parameters of the laboratory are adjusted sequentially to -10℃, -9℃, ..., 0℃, 1℃, 2℃, ..., 39℃, 40℃, and 51 outlet pressure setpoints P and the functional relationship P=P(T, X, Ps, R, K) are obtained by measuring the range hood.

[0061] ...;

[0062] When the ambient humidity is 80%, the ambient air pressure is 89948Pa, and the motor speed is 100 rpm, the temperature parameters of the laboratory are adjusted sequentially to -10℃, -9℃, ..., 0℃, 1℃, 2℃, ..., 39℃, and 40℃. The corresponding measurements of the range hood yield 51 outlet pressure setpoints P and the functional relationship P=P(T, X, Ps, R, K).

[0063] Similarly, when the motor speed is 100 rpm, 200 rpm, ..., 800 rpm, and other parameters of the laboratory environment remain unchanged, the corresponding measurements of the range hood yield multiple outlet pressure setpoints P and the functional relationship P=P(T, X, Ps, R, K).

[0064] By adjusting all parameter settings, multiple outlet pressure settings for the range hood are obtained, forming the outlet pressure model of the range hood under experimental conditions: P=P(T, X, Ps, R, K). It can be understood that P=P(T, X, Ps, R, K) is a dispersed function or a continuous function.

[0065] As described above, a functional relationship is constructed using the laboratory's ambient humidity X, ambient air pressure Ps, ambient temperature T, motor speed R, and the range hood outlet pressure setpoint P.

[0066] Under specific environmental and operating conditions, the first pressure outlet is calculated, and the motor speed is adjusted according to the magnitude of the first outlet pressure to achieve truly effective airflow. This improves the smoke extraction effect of the range hood while maintaining low energy consumption.

[0067] The optional range hood is used to determine the first temperature setting value corresponding to the first indoor temperature, the first humidity setting value corresponding to the first indoor humidity, the first air pressure setting value corresponding to the first indoor air pressure, and the first speed setting value corresponding to the first motor speed. It then finds the outlet pressure setting value corresponding to the first temperature setting value, the first humidity setting value, the first air pressure setting value, and the first speed setting value from the outlet pressure model. This outlet pressure setting value is the first outlet pressure.

[0068] Option Y / S ≤ 0.5

[0069] Y represents the absolute value of the difference between the first indoor temperature and the first temperature setpoint, S represents the absolute value of the difference between the first temperature setpoint and the adjacent temperature setpoint, and the first indoor temperature is located within the temperature range between the first temperature setpoint and the adjacent temperature setpoint; or...

[0070] Y represents the absolute value of the difference between the first indoor humidity and the first humidity setting value, S represents the absolute value of the difference between the first humidity setting value and the adjacent humidity setting value, and the first indoor humidity is located within the humidity range from the first humidity setting value to the adjacent humidity setting value; or...

[0071] Y represents the absolute value of the difference between the first indoor air pressure and the first air pressure setting value, S represents the absolute value of the difference between the first air pressure setting value and the adjacent air pressure setting value, and the first indoor air pressure is located within the air pressure range from the first air pressure setting value to the adjacent air pressure setting value; or...

[0072] Y is the absolute value of the difference between the first motor speed and the first speed setting value, S is the absolute value of the difference between the first speed setting value and the adjacent speed setting value, and the first motor speed is located within the speed range from the first speed setting value to the adjacent speed setting value.

[0073] In this embodiment, the dispersion function formed by the experimental data interacts with the normal operating data of the range hood to obtain the first outlet pressure.

[0074] In actual use, the process of calculating the first outlet pressure of a range hood is as follows:

[0075] The range hood obtains the first indoor temperature through a temperature detection device, determines the temperature setpoint range within which the first indoor temperature falls, and calculates the absolute value Y of the difference between the first indoor temperature and any temperature setpoint within this range. If Y / S ≤ 0.5, the corresponding temperature setpoint is determined as the first temperature setpoint and assigned to the first indoor temperature. For example, if the first indoor temperature is 34.8℃, which falls within the temperature setpoint range of 34℃ to 35℃, then the difference between 34.8℃ and the temperature setpoint 34℃ is S = 35 - 34, and Y / S > 0.5; then the absolute value of the difference between 34.8℃ and the temperature setpoint 35℃ is S = 35 - 34, and Y / S ≤ 0.5; thus, the first temperature setpoint corresponding to the first indoor temperature of 34.8℃ can be determined as 35℃, and the first temperature setpoint 35℃ is assigned to the first indoor temperature of 34.8℃.

[0076] Similarly, the first humidity setting value corresponding to the first indoor humidity can be obtained, and the first humidity setting value can be assigned to the first indoor humidity. For example, the first humidity setting value corresponding to the first indoor humidity of 20.5% is 20%.

[0077] The first pressure setting value corresponding to the first indoor air pressure can be obtained, and the first pressure setting value can be assigned to the first indoor air pressure. For example, the first pressure setting value corresponding to the first indoor air pressure of 88900Pa is 89948Pa.

[0078] The first speed setting value corresponding to the first motor speed can be obtained, and the first speed setting value can be assigned to the first motor speed. For example, the first speed setting value corresponding to the first motor speed of 379 is 400.

[0079] The range hood finds the outlet pressure setting value corresponding to the first temperature setting value, the first humidity setting value, the first air pressure setting value, and the first speed setting value from the outlet pressure model. This outlet pressure setting value is the first outlet pressure.

[0080] Optional range hood for calculating the first outlet pressure P Q Compared to the default outlet pressure value P of the current gear z The first correlation value P M1 The motor speed is adjusted according to the speed regulation rule corresponding to the first associated value;

[0081] P M1 =(P Q -P z ) / P z .

[0082] Optional 0 < P M1 ≤0.1, the motor speed is increased by 5% based on the default speed of the current gear.

[0083] 0.1 < PM1 ≤0.2, the motor speed is increased by 10% based on the default speed of the current gear, ...,

[0084] 0.9 < P M1 ≤1, the motor speed is increased by 50% based on the default speed of the current gear.

[0085] P M1 >1, upgrade gear or issue a gear upgrade notification.

[0086] In this embodiment, the range hood has a pre-stored default outlet pressure value P for each setting. z The default outlet pressure value P corresponding to different gears z They may differ. Clearly, when a range hood is operating, the default outlet pressure value P corresponding to its current setting can be determined. z Based on the above operations, the first outlet pressure P of the range hood has been calculated. Q The default outlet pressure value P corresponding to the current gear is also known. z Then according to formula P M1 =(P Q -P z ) / P z The first correlation value P at the current time can be calculated. M1 .

[0087] The range hood also has pre-stored speed adjustment rules corresponding to different correlation values, so the first correlation value P is calculated. M1 Then, the range hood follows the first associated value P. M1 The corresponding speed regulation rules adjust the motor speed.

[0088] The range hood has pre-stored the default motor speed for each setting. At the current setting, 0 < P is detected. M1 If the value is ≤0.1, the range hood will increase its motor speed by 5% based on the default motor speed for the current setting. For example, if the default motor speed for the current setting is 100 RPM, then after increasing the speed by 5%, the setting will remain the same and the motor speed will be 105 RPM. Alternatively, if 0.1 < P is detected at the current setting... M1 If the value is ≤0.2, then the range hood will increase its motor speed by 10% based on the default motor speed at the current setting; ...; and so on, until 0.9 < P is detected at the current setting. M1 If the value is ≤1, then the range hood will increase its speed by 50% based on the default motor speed of the current setting.

[0089] If P is detected in the current gear M1If the speed is greater than 1, the range hood will either directly increase the speed by one level from the current setting, or issue a speed-up notification, allowing the user to control whether to increase the speed. After increasing the speed, the initial motor speed will be the default motor speed corresponding to the increased speed; for example, if the current setting is 1 and the default motor speed is 100 RPM, and the next setting is 2 and the default motor speed is 200 RPM, then the range hood will detect P at setting 1. M1 >1, you can shift to gear 2 and adjust the motor speed to 200 rpm.

[0090] Optional range hoods may have indicator lights or displays on their panels that provide audio and visual notifications upon receiving a change of schedule, allowing users to quickly receive the notification. Alternatively, optional range hoods can be linked to a user's mobile device, allowing change of schedule notifications to be sent to the user's mobile device for remote reception. These are not limited to these options.

[0091] The optional range hood also adjusts the motor speed based on the first outlet pressure and the indoor temperature when the indoor temperature is higher than the preset reference temperature.

[0092] Optional T M1 This is the difference between the indoor temperature and the preset reference temperature.

[0093] 0 < T M1 ≤1, the motor speed is increased by 3% based on the default speed of the current gear.

[0094] 1 < T M1 ≤2, the motor speed is increased by 6% based on the default speed of the current gear, ...

[0095] 16 < T M1 ≤17, the motor speed is increased by 51% based on the default speed of the current gear.

[0096] Optional T M1 >17, issue a cooling notification.

[0097] In this embodiment, the range hood has a preset reference temperature. If the kitchen ambient temperature is higher than the preset reference temperature, the range hood's rotation speed will be affected by the ambient temperature. In this case, considering the impact of ambient temperature on the rotation speed can improve the accuracy of rotation speed control. If the kitchen ambient temperature is lower than the preset reference temperature, the range hood's operation is minimally affected by the ambient temperature and can be ignored. The preset reference temperature can be set to 23°C, but it can vary depending on the region or environment and is not specifically limited.

[0098] If the kitchen ambient temperature is higher than the preset reference temperature, the range hood will adjust the motor speed according to the first outlet pressure and the indoor temperature, which can improve the accuracy of speed control.

[0099] If the selected indoor temperature is the first indoor temperature, then the temperature detection device can be shared. Alternatively, an independent ambient temperature sensor can be installed in the kitchen environment, located near the range hood but far from the source of cooking fumes. This ambient temperature sensor provides the range hood with the indoor temperature, which may be the same as or different from the first indoor temperature collected by the temperature detection device.

[0100] The range hood calculates the difference T between the indoor temperature and the preset reference temperature. M1 The range hood also has pre-stored different difference values ​​T. M1 The corresponding speed regulation rule is used to calculate the difference T. M1 Then, the range hood is set according to the difference T. M1 The corresponding speed regulation rules adjust the motor speed.

[0101] The range hood has pre-stored the default motor speed for each setting. If 0 < T is detected at the current setting... M1 If the value is ≤1, the range hood will increase its speed by 3% based on the default motor speed of the current setting. For example, if the default motor speed of the current setting is 100 rpm, then after increasing the speed by 3%, the setting will remain the same and the motor speed will be 103 rpm. Alternatively, if 1 < T is detected at the current setting... M1 If the value is ≤2, then the range hood will increase its speed by 6% based on the default motor speed for the current setting; ...; and so on. If 16 < T is detected at the current setting... M1 If the value is ≤17, then the range hood will increase its speed by 51% based on the default motor speed of the current setting.

[0102] It's understandable that the range hood adjusts its motor speed based on the first outlet pressure and the indoor temperature; the speed adjustment rules of these two factors can be superimposed. For example, at the current moment, 0 < P. M1 ≤0.1, and 0<T M1 If the value is ≤1, then the range hood needs to increase its motor speed by 5% + 3% based on the default speed at the current setting. Details will not be elaborated further.

[0103] Optional T M1 >17. Issue a cooling notification. Optional range hoods may have indicator lights or displays on their panels that provide audible and visual alerts upon receiving a cooling notification, ensuring users receive the notification quickly. Alternatively, optional range hoods may wirelessly communicate with the user's mobile device, allowing the cooling notification to be sent remotely.

[0104] When T M1 If the temperature is above 17 degrees Celsius, it indicates a high ambient temperature. At this time, users can be reminded to turn on the cooling equipment in their homes. Alternatively, the range hood and cooling equipment can be connected wirelessly. M1When the temperature exceeds 5 PM, the range hood will activate its cooling system based on user commands. This is to increase the airflow of the range hood, remove more heat, lower the indoor temperature of the hot kitchen, and improve the user experience.

[0105] As described above, the range hood system utilizes temperature, humidity, and air pressure detection data to construct a relationship and obtain the outlet pressure, thereby improving the accuracy of speed adjustment. The temperature, humidity, and air pressure detection devices are placed inside the kitchen at a certain distance from the range hood, protecting the detection or sensor equipment from damage caused by high-concentration and high-temperature fumes. Furthermore, the range hood uses information transmitted from indoor sensors to process data at a smart processing center, adjusting the airflow to remove heat from the kitchen and maintain a comfortable temperature range (22℃-24℃).

[0106] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A range hood system, characterized by, The oil fume exhauster and the temperature detection device, the humidity detection device and the air pressure detection device connected with the oil fume exhauster, the oil fume exhauster comprising a motor; The temperature detection device is used to obtain a first indoor temperature, the humidity detection device is used to obtain a first indoor humidity, and the air pressure detection device is used to obtain a first indoor air pressure; The oil fume exhauster is used to determine a corresponding first outlet pressure according to the first indoor temperature, the first indoor humidity, the first indoor air pressure, a first motor rotating speed of the motor and an outlet pressure model, and adjust the motor rotating speed according to the first outlet pressure, wherein the outlet pressure model is a functional relationship between a temperature setting value T, a humidity setting value X, an air pressure setting value Ps, a motor rotating speed setting value R and an outlet pressure setting value P; The oil fume exhauster is used to determine a first temperature setting value corresponding to the first indoor temperature, a first humidity setting value corresponding to the first indoor humidity, a first air pressure setting value corresponding to the first indoor air pressure, and a first rotating speed setting value corresponding to the first motor rotating speed, and find out an outlet pressure setting value corresponding to the first temperature setting value, the first humidity setting value, the first air pressure setting value and the first rotating speed setting value from the outlet pressure model, the outlet pressure setting value being the first outlet pressure; Y / S≤0.5, Y is an absolute value of a difference between the first indoor temperature and the first temperature setting value, S is an absolute value of a difference between the first temperature setting value and an adjacent temperature setting value, and the first indoor temperature is located in a temperature interval from the first temperature setting value to the adjacent temperature setting value; or, Y is an absolute value of a difference between the first indoor humidity and the first humidity setting value, S is an absolute value of a difference between the first humidity setting value and an adjacent humidity setting value, and the first indoor humidity is located in a humidity interval from the first humidity setting value to the adjacent humidity setting value; or, Y is an absolute value of a difference between the first indoor air pressure and the first air pressure setting value, S is an absolute value of a difference between the first air pressure setting value and an adjacent air pressure setting value, and the first indoor air pressure is located in an air pressure interval from the first air pressure setting value to the adjacent air pressure setting value; or, Y is an absolute value of a difference between the first motor rotating speed and the first rotating speed setting value, S is an absolute value of a difference between the first rotating speed setting value and an adjacent rotating speed setting value, and the first motor rotating speed is located in a rotating speed interval from the first rotating speed setting value to the adjacent rotating speed setting value. The outlet pressure model is P=P(T, X, Ps, R, K), wherein K is a constant of different inlet and outlet oil fume exhausters.

2. The hood system according to claim 1, characterized in that The oil fume exhauster is used to calculate an outlet pressure setting value under an i-th temperature setting value, a j-th humidity setting value, an m-th air pressure setting value and an n-th rotating speed setting value in an experimental environment to construct the outlet pressure model, i, j, m and n being positive integers; 3. The hood system according to claim 1 or 2, characterized in that ​ In the outlet pressure model, the temperature parameter includes 1st to A-th temperature set values, the humidity parameter includes 1st to B-th humidity set values, the air pressure parameter includes 1st to C-th air pressure set values, the rotating speed parameter includes 1st to D-th rotating speed set values, A, B, C and D are positive integers greater than or equal to 2; 1≤i≤A, 1≤j≤B, 1≤m≤C, 1≤n≤D.

4. The hood system according to claim 1, wherein, Said range hood is used to calculate the first outlet pressure P Q The first associated value P z of the current gear default outlet pressure value P M1 According to the speed regulation rule corresponding to the first associated value, the motor speed is adjusted; P M1 = (P Q -P z ) / P z .

5. The range hood system of claim 4, wherein 0 < P M1 ≤0.1, the current gear default motor speed on the basis of an increase of 5%, 0.1 < P M1 ≤0.2, 10% increase on the basis of the current gear default motor speed, …, 0.9 < P M1 ≤ 1, the current gear default motor speed on the basis of an increase of 50%, P M1 >1, upshift or upshift notification is issued.

6. The hood system according to claim 1, wherein, The range hood is further configured to adjust the motor speed according to the first outlet pressure and the indoor temperature when the indoor temperature is greater than a preset reference temperature.

7. The hood system according to claim 6, characterized in that T M1 is the difference between the indoor temperature and the preset reference temperature; 0 < T M1 ≤ 1, the current gear default motor speed on the basis of increasing 3%, 1 < T M1 ≤ 2, the current gear default motor speed on the basis of increasing 6%,..., 16 < T M1 ≤ 17, the current gear default motor speed on the basis of an increase of 51%.

8. The range hood system of claim 7, wherein T M1 > 17, a refrigeration notification is issued.

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