A range hood and a control method thereof

Abstract

The application relates to an oil fume extractor and a running control method thereof, wherein the oil fume extractor comprises a fan system with a built-in motor, and is characterized in that: the oil fume extractor further comprises a temperature rise detection module for obtaining motor temperature rise data; a temperature reduction module for reducing the temperature of the motor; and a control execution module, when the motor temperature rise data of the oil fume extractor under a current power running mode is greater than a motor temperature rise reference value under the current power running mode, the control execution module starts the temperature reduction module to reduce the temperature of the motor, and the temperature reduction module is closed until the motor temperature rise data of the oil fume extractor under the current power running mode is not greater than the motor temperature rise reference value under the current power running mode. Compared with the prior art, the temperature rise detection module is used to monitor the temperature rise state of the motor under different power running modes, and the temperature reduction module is used to reduce the temperature of the motor, so that the motor running temperature rise is ensured to be within a safe and controllable range at all times, and the motor is ensured not to be damaged by external factors or self-overload in the use process.

Description

Technical Field

[0001] This invention relates to a range hood and its control method. Background Technology

[0002] A range hood is a kitchen appliance designed to purify the kitchen environment. During use, it switches between different power modes based on user selection or the concentration of cooking fumes. In low-power mode, the fan speed is low, potentially resulting in insufficient airflow. In high-power mode, the motor speed increases, causing a rapid rise in motor temperature. When the temperature reaches a certain level, the range hood triggers overheat protection to stop the motor, leading to a poor user experience. Furthermore, in harsh environments, excessive motor load can cause the overheat protection to fail, occasionally resulting in motor damage due to the inability to detect temperature rise, severely impacting the user experience. Summary of the Invention

[0003] The primary technical problem to be solved by this invention is to provide a range hood that can effectively protect the motor in a timely manner based on the motor temperature rise, while also improving the user experience.

[0004] The technical problem to be further solved by the present invention is to provide an operation control method for a range hood that can effectively protect the motor in a timely manner based on the motor temperature rise, while improving the user experience.

[0005] The technical solution adopted by the present invention to solve the above-mentioned primary technical problem is: a range hood, including a fan system with an internal motor, characterized in that: it further includes...

[0006] Temperature rise detection module used to acquire motor temperature rise data;

[0007] Cooling module used to cool the motor;

[0008] The control execution module, temperature rise detection module, and cooling module are all communicatively connected to the control execution module. The control execution module has preset reference values ​​for the motor temperature rise of the range hood under different power operating modes. When the range hood starts running, the control execution module detects the motor temperature rise data of the range hood under the current power operating mode based on the temperature rise detection module. If the motor temperature rise data of the range hood under the current power operating mode is greater than the reference value for the motor temperature rise under the current power operating mode, the control execution module activates the cooling module to cool the motor until the motor temperature rise data of the range hood under the current power operating mode is no greater than the reference value for the motor temperature rise under the current power operating mode, and then shuts down the cooling module.

[0009] As an improvement, a speed acquisition module for obtaining motor speed is also included. This speed acquisition module is also connected to the control execution module. When the motor temperature rise data of the range hood in the current power operation mode is not greater than the motor temperature rise reference value in the current power operation mode, the control execution module first shuts down the cooling module, then controls the motor to increase its speed, and simultaneously controls the range hood to switch to a higher power operation mode. In this higher power operation mode, the control execution module again detects the motor temperature rise data of the range hood in this higher power operation mode according to the temperature rise detection module. If the motor temperature rise data of the range hood in this higher power operation mode is greater than the motor temperature rise reference value in this higher power operation mode, the control execution module starts the cooling module to cool the motor until the motor temperature rise data of the range hood in this higher power operation mode is not greater than the motor temperature rise reference value in this higher power operation mode, and then shuts down the cooling module.

[0010] As a preferred embodiment, the temperature rise detection module includes a temperature sensor and a calculation module. The calculation module obtains the motor temperature rise data based on the motor temperature values ​​detected by the temperature sensor twice.

[0011] As a preferred embodiment, the cooling module includes a water pump, a water pipe, a water tank, and a water mist nozzle. The water mist nozzle is connected to the water tank through the water pipe and the water pump. The water pump draws water from the water tank and delivers it to the water mist nozzle through the water pipe, and then sprays it out from the water mist nozzle. The water mist nozzle is directly facing the surface of the rear end cover of the motor.

[0012] The technical solution adopted by the present invention to solve the above-mentioned further technical problems is as follows: a method for operating a range hood with the above-mentioned structure, characterized in that: after the range hood is started and running, operation control is performed through the following steps:

[0013] Step 1: The range hood's fan system operates according to the preset default power mode, and the cooling module is initially off;

[0014] Step 2: The control execution module obtains the reference value of motor temperature rise under the current power operation mode;

[0015] Step 3: After a preset time △T, the cooling module collects the motor temperature rise data of the range hood in the current power operation mode;

[0016] Step 4: The control execution module determines whether the motor temperature rise data of the range hood in the current power operation mode is greater than the motor temperature rise reference value in the current power operation mode. If yes, the control execution module starts the cooling module to cool the motor and then returns to step 2; if no, proceed to step 5.

[0017] Step 5: The control execution module first shuts down the cooling module, then controls the motor to increase its speed, and at the same time controls the range hood to switch to a higher power operating mode. When the higher power operating mode is updated to the current operating mode;

[0018] Step 6: The speed acquisition module acquires the motor speed of the range hood in the current power operation mode;

[0019] Step 7: The control execution module determines whether the motor speed of the range hood in the current power operation mode is within the motor speed range corresponding to that power operation module. If not, the control execution module controls the fan system to stop running and reminds the user that the fan system needs to be cleaned or the fan system parts need to be replaced; if yes, proceed to step 8; the control execution module has the motor speed range values ​​of the range hood in different power operation modes pre-stored.

[0020] Step 8: After a preset time △T, the cooling module collects the motor temperature rise data of the range hood in the current power operation mode;

[0021] Step 9: The control execution module determines whether the motor temperature rise data of the range hood in the current power operation mode is greater than the motor temperature rise reference value in the current power operation mode. If yes, the control execution module starts the cooling module to cool the motor, and then returns to step 8; if no, the control execution module first turns off the cooling module, and at the same time controls the range hood to maintain the current power operation mode and controls the motor to maintain the current speed, and then returns to step 2.

[0022] Compared with existing technologies, the advantages of this invention are as follows: It utilizes a temperature rise detection module to monitor the temperature rise of the motor under different power operating modes, and a cooling module to cool the motor, thereby reducing the overall temperature rise of the machine. This ensures that the motor's operating temperature rise remains within a safe and controllable range at all times, guaranteeing the motor's sensitivity and reliability during use and preventing damage from external factors or overload. In the improved design, when the motor temperature rise is within a safe and controllable range, the fan speed is increased, thereby increasing the fan's airflow and improving overall machine performance. This maximizes the range hood's smoke extraction effect and the accuracy of automatic pressure control. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the internal structure of the range hood in an embodiment of the present invention.

[0024] Figure 2 This is a flowchart of the operation control method for a range hood in an embodiment of the present invention. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 The range hood shown includes a housing 1, within which a fan system 2 is housed. The fan system 2 includes a motor 3. Next to the motor 3 are a temperature rise detection module 4 for acquiring motor temperature rise data, a speed acquisition module 5 for acquiring motor speed, and a cooling module for cooling the motor. The range hood also includes a control execution module (not shown in the figure). The temperature rise detection module 4, speed acquisition module 5, and cooling module are all communicatively connected to the control execution module. (See [reference needed]). Figure 1 As shown, the control execution module has preset reference values ​​for motor temperature rise and motor speed range for the range hood under different power operating modes.

[0027] In this embodiment, the temperature rise detection module 4 includes a temperature sensor and a calculation module. The calculation module obtains the motor temperature rise data based on the motor temperature values ​​detected by the temperature sensor twice. The temperature sensor can be an infrared temperature sensor or a laser temperature sensor. The cooling module includes a water pump 7, a water pipe 8, a water tank 9, and a water mist nozzle 6. The water mist nozzle 6 is connected to the water tank 9 through the water pipe 8 and the water pump 7. The water pump 7 draws water from the water tank 9 and delivers it to the water mist nozzle 6 through the water pipe 8, where it is sprayed out. The water mist nozzle 6 faces the rear end cover surface of the motor 3. (See Figure 1) Figure 1 As shown.

[0028] After the above-mentioned range hood is started and running, its operation is controlled through the following steps, see below. Figure 2 As shown:

[0029] Step 1: The range hood's fan system operates according to the preset default power mode, and the cooling module is initially off;

[0030] Step 2: The control execution module obtains the reference value dT0(K) of the motor temperature rise under the current power operation mode;

[0031] Step 3: After a preset time △T, the cooling module collects the motor temperature rise data dT1(K) of the range hood in the current power operation mode;

[0032] Step 4: The control execution module determines whether the motor temperature rise data dT1(K) of the range hood in the current power operation mode is greater than the reference value dT0(K) of the motor temperature rise in the current power operation mode. If so, the control execution module starts the cooling module to cool the motor. That is, the control execution module turns on the water pump, sprays water from the water tank through the water mist nozzle to form water mist or small water droplets covering the surface of the motor's rear end cover. The water mist or small water droplets sprayed on the motor's rear end cover evaporate quickly, carrying away the motor's heat, thereby reducing the motor's operating temperature rise and helping to stabilize the motor's temperature rise within the safe operating range. Since atmospheric pressure decreases with increasing humidity and decreasing temperature, the water mist or small water droplets formed by the cooling module can not only improve the temperature and humidity around the motor, but also create a lower pressure around the motor, approaching a negative pressure zone, increasing the fan's air intake and smoke extraction effect, improving fan airflow, and enhancing the overall performance of the machine. Then return to step 2; if not, proceed to step 5.

[0033] Step 5: The control execution module first shuts down the cooling module, then controls the motor to increase its speed, and at the same time controls the range hood to switch to a higher power operating mode. When the higher power operating mode is updated to the current operating mode;

[0034] Step 6: The speed acquisition module acquires the motor speed of the range hood in the current power operation mode;

[0035] Step 7: The control execution module determines whether the motor speed of the range hood in the current power operation mode is within the motor speed range corresponding to that power operation module. If not, it indicates that the motor speed is too low under normal power conditions, which is very likely due to oil stains covering the impeller surface of the fan system. The presence of oil stains increases the overall mass of the impeller. When the motor speed increases, the overall load on the motor will increase, causing the motor to overheat and its temperature to rise significantly, or components to be damaged, putting the motor in a dangerous state. At this time, the operation control execution module controls the fan system to stop running and reminds the user to clean the fan system or replace fan system parts. If yes, proceed to step 8; the control execution module has pre-stored the motor speed range values ​​of the range hood in different power operation modes.

[0036] Step 8: After a preset time △T, the cooling module collects the motor temperature rise data dT2(K) of the range hood in the current power operation mode;

[0037] Step 9: The control execution module determines whether the motor temperature rise data dT2(K) of the range hood in the current power operation mode is greater than the motor temperature rise reference value dT0(K) in the current power operation mode. If yes, the control execution module starts the cooling module to cool the motor, and then returns to step 8; if no, the control execution module first turns off the cooling module, and at the same time controls the range hood to maintain the current power operation mode and controls the motor to maintain the current speed, and then returns to step 2.

Claims

1. A range hood, comprising a fan system with an internal motor, characterized in that: Also includes Temperature rise detection module used to acquire motor temperature rise data; Cooling module used to cool the motor; The control execution module, temperature rise detection module, and cooling module are all communicatively connected to the control execution module. The control execution module has preset reference values ​​for the motor temperature rise of the range hood under different power operating modes. When the range hood starts running, the control execution module detects the motor temperature rise data of the range hood under the current power operating mode based on the temperature rise detection module. If the motor temperature rise data of the range hood under the current power operating mode is greater than the reference value for the motor temperature rise under the current power operating mode, the control execution module activates the cooling module to cool the motor until the motor temperature rise data of the range hood under the current power operating mode is no greater than the reference value for the motor temperature rise under the current power operating mode, and then shuts down the cooling module. A speed acquisition module for obtaining motor speed is also connected to the control execution module. When the motor temperature rise data of the range hood in the current power operation mode is not greater than the motor temperature rise reference value in the current power operation mode, the control execution module first shuts down the cooling module, then controls the motor to increase its speed, and simultaneously controls the range hood to switch to a higher power operation mode. In this higher power operation mode, the control execution module again detects the motor temperature rise data of the range hood in this higher power operation mode according to the temperature rise detection module. If the motor temperature rise data of the range hood in this higher power operation mode is greater than the motor temperature rise reference value in this higher power operation mode, the control execution module starts the cooling module to cool the motor until the motor temperature rise data of the range hood in this higher power operation mode is not greater than the motor temperature rise reference value in this higher power operation mode, and then shuts down the cooling module.

2. The range hood according to claim 1, characterized in that: The temperature rise detection module includes a temperature sensor and a calculation module. The calculation module obtains the motor temperature rise data based on the motor temperature values ​​detected by the temperature sensor twice.

3. The range hood according to claim 1, characterized in that: The cooling module includes a water pump, water pipes, a water tank, and a water mist nozzle. The water mist nozzle is connected to the water tank through the water pipes and the water pump. The water pump draws water from the water tank and delivers it to the water mist nozzle through the water pipes, where it is then sprayed out. The water mist nozzle is directly facing the surface of the rear end cover of the motor.

4. A method for controlling the operation of a range hood as described in claim 1, characterized in that: After the range hood is started, its operation is controlled by following these steps: Step 1: The range hood's fan system operates according to the preset default power mode, and the cooling module is initially off; Step 2: The control execution module obtains the reference value of motor temperature rise under the current power operation mode; Step 3: After a preset time △T, the cooling module collects the motor temperature rise data of the range hood in the current power operation mode; Step 4: The control execution module determines whether the motor temperature rise data of the range hood in the current power operation mode is greater than the motor temperature rise reference value in the current power operation mode. If yes, the control execution module starts the cooling module to cool the motor and then returns to step 2; if no, proceed to step 5. Step 5: The control execution module first shuts down the cooling module, then controls the motor to increase its speed, and at the same time controls the range hood to switch to a higher power operating mode, updating the higher power operating mode to the current operating mode; Step 6: The speed acquisition module acquires the motor speed of the range hood in the current power operation mode; Step 7: The control execution module determines whether the motor speed of the range hood in the current power operation mode is within the motor speed range corresponding to that power operation mode. If not, the control execution module controls the fan system to stop running and reminds the user that the fan system needs to be cleaned or the fan system parts need to be replaced. If so, proceed to step 8; the control execution module has pre-stored the motor speed range values ​​of the range hood under different power operation modes; Step 8: After a preset time △T, the cooling module collects the motor temperature rise data of the range hood in the current power operation mode; Step 9: The control execution module determines whether the motor temperature rise data of the range hood in the current power operation mode is greater than the motor temperature rise reference value in the current power operation mode. If yes, the control execution module starts the cooling module to cool the motor, and then returns to step 8; if no, the control execution module first turns off the cooling module, and at the same time controls the range hood to maintain the current power operation mode and controls the motor to maintain the current speed, and then returns to step 2.

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