A smoke stove linkage control method

Abstract

The present invention discloses a smoke and stove linkage control method, in which a stove main control is communicatively connected with a range hood main control, comprising the following steps: S1: the stove main control detects the temperatures of two stove heads through two temperature detection devices, and when the temperature of the first stove head exceeds a threshold temperature, the stove main control sends control information indicating that the temperature of the first stove head exceeds the threshold to the range hood main control; S2: the range hood main control reads a control parameter corresponding to the first stove head according to the control information; S3: the range hood main control reads a detection value of the smoke detection device, and when the detection value exceeds the smoke detection threshold, the range hood main control controls the rotation of the smoke exhaust fan according to the control parameter corresponding to the first stove head; the present invention improves and optimizes the control method for smoke and stove linkage, so that users can obtain the same cooking experience when cooking through any stove head of the stove, and determines specific control parameters through experiments, which can effectively avoid the problem of poor cooking experience for users.

Description

Technical Field

[0001] The present invention belongs to the technical field of kitchen appliances, and in particular relates to a smoke and stove linkage control method. Background Art

[0002] Range hoods and gas stoves are typically used in pairs. The two burners of a gas stove are symmetrically positioned. If the range hood has only one air intake, it is positioned symmetrically about the center of the range hood. If the range hood has two air intakes, the left and right intakes are also symmetrical. Therefore, if the range hood is equipped with a smoke detector located in the center of the hood housing, the smoke concentration curves detected by the smoke detector should be very similar, regardless of whether the left or right burner is used for the same cooking process. However, when the applicant used the two burners of the gas stove for oil boiling and water boiling experiments, the smoke concentration curves detected by the smoke detector differed significantly. This suggests that the sensitivity of the same smoke detector varies significantly when cooking with different burners. If both burners use the same linkage control, users will experience different cooking experiences when cooking with different burners, which can easily lead to a poor cooking experience. Summary of the Invention

[0003] The purpose of the present invention is to provide a smoke and stove linkage control method, aiming to improve the problem that when performing smoke and stove linkage control, both stove heads use the same linkage control, which easily leads to a poor cooking experience for users.

[0004] To achieve the above-mentioned object, a range hood and stove linkage control method is provided, wherein the range hood comprises a range hood housing, a smoke exhaust duct is formed in the range hood housing, a smoke detector and a smoke exhaust fan are disposed in the smoke exhaust duct, a motor driving the smoke exhaust fan is a variable frequency motor, the range hood has at least two burners including temperature detection devices, and a range hood master control of the range hood is communicatively connected to a range hood master control of the range hood;

[0005] The steps include:

[0006] S1: The stove master controller detects the temperatures of the two burners through two temperature detection devices. When the temperature of the first burner exceeds a threshold temperature, the stove master controller sends a control message indicating that the temperature of the first burner exceeds the threshold to the range hood master controller.

[0007] S2: The range hood master controller reads the control parameters corresponding to the first stove head according to the control information;

[0008] S3: The range hood master controller reads the detection value of the smoke detection device. When the detection value exceeds the smoke detection threshold, the range hood master controller controls the rotation of the smoke exhaust fan according to the control parameters corresponding to the first stove head.

[0009] Furthermore, the range hood housing has an air intake port, which is symmetrically arranged on the left and right. The air intake port is connected to an air exhaust port arranged on the range hood housing, and a smoke exhaust duct is formed by connecting the air intake port to the exhaust port. A smoke exhaust fan is also provided in the smoke exhaust duct, and the smoke exhaust fan has a centrifugal wind wheel and a volute arranged outside it.

[0010] Furthermore, the axis of the centrifugal wind wheel is horizontal or inclined with the front lower and the rear higher, and the smoke exhaust fan has an air inlet, which is opposite to the side of the centrifugal wind wheel. One side of the air inlet has a volute section, and the side corresponding to the volute section is a volute tongue section; the air inlet corresponding to the volute section has a large air suction volume, so that the local negative pressure is low, and most of the area of ​​the volute section is located on one side of the center line of the range hood.

[0011] Furthermore, in step S1, the stove main control detects the temperatures of the two burners. When the temperature of the first burner does not exceed the threshold temperature, but the temperature of the second burner exceeds the threshold temperature, the stove main control sends control information that the temperature of the second burner exceeds the threshold to the range hood main control. The range hood main control reads the control parameters corresponding to the second burner according to the control information; the range hood main control reads the detection value of the smoke detection device. When the detection value exceeds the smoke detection threshold, the range hood main control controls the rotation of the smoke exhaust fan according to the control parameters corresponding to the second burner, wherein the control parameters corresponding to the second burner are different from the control parameters corresponding to the first burner.

[0012] Furthermore, the control parameters corresponding to the first stove include parameters for controlling the rotation speed of the variable frequency motor, including frequency modulation change data H1 of the variable frequency motor, and the range of H1 is 1 Hz-2 Hz.

[0013] Furthermore, the control parameters corresponding to the second stove head include parameters for controlling the rotation speed of the variable frequency motor, including frequency modulation change data H2 of the variable frequency motor, and the range of H2 is 2Hz-4Hz.

[0014] Furthermore, the first stove head is arranged on one side of the center line of the range hood corresponding to the majority area of ​​the volute section, and the second stove head is arranged on the other side of the center line of the range hood corresponding to the majority area of ​​the volute section.

[0015] Furthermore, the smoke threshold includes a first smoke threshold corresponding to the first stove head, and a second smoke threshold corresponding to the second stove head. The first smoke threshold is greater than the second smoke threshold, and the second smoke threshold is only 10-50% of the first smoke threshold.

[0016] Furthermore, when it is detected that the temperature of the first burner exceeds the threshold temperature, it is found that the temperature of the second burner exceeds the threshold temperature, or when it is detected that the temperature of the second burner exceeds the threshold temperature, it is found that the temperature of the first burner exceeds the threshold temperature, then it operates according to the frequency modulation change data H2 and adopts the first smoke detection threshold.

[0017] Furthermore, the range hood has a PM2.5 detection module electrically connected to the range hood main control. When the PM2.5 detection module detects that the oil fume concentration in the kitchen air is greater than a preset threshold, the range hood main control increases the speed of the exhaust fan.

[0018] By improving and optimizing the control method for smoke and stove linkage, the present invention enables users to obtain the same cooking experience when cooking on any burner of the stove. Furthermore, by experimentally determining specific control parameters, the problem of a poor user cooking experience can be effectively avoided. Other advantages of the present invention are described in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a control structure block diagram corresponding to the smoke stove linkage control method of the present invention;

[0020] Figure 2 is a schematic longitudinal cross-sectional view of the range hood of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the range hood of the present invention.

[0022] Figure numerals: 1. range hood housing; 2. smoke detection device; 3. smoke exhaust fan; 4. air vent. DETAILED DESCRIPTION

[0023] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0025] Example 1

[0026] This embodiment provides a range hood and a stove. Figure 2 and Figure 3 As shown, the range hood comprises a housing 1, which includes a back panel, a left panel, a right panel, a top panel, an air duct enclosure, and a closing panel. The back panel is located behind the top panel and extends downward from top to bottom. The left and right panels are located on the left and right sides of the top panel, extending downward from top to bottom, and are wider at the top and narrower at the bottom. The air duct enclosure is located at the top end of the top panel, and the closing panel is located near the top end of the air duct enclosure. The top panel has a cavity, and a narrow and long air intake port is defined on the lower wall of the cavity. Its length runs along the left and right directions, and the air intake ports are symmetrically arranged on both sides. The closing panel is provided with an air outlet, which is equipped with a check valve. The air intake and exhaust ports connect to form a smoke exhaust duct, within which are located a smoke detector 2 and a smoke exhaust fan 3. The smoke exhaust fan 3 comprises a variable frequency motor, a centrifugal impeller, and a volute disposed thereon. The variable frequency motor is connected to the centrifugal impeller, driving the centrifugal impeller to rotate, thereby creating a negative pressure area and generating suction. The axis of the centrifugal wind wheel is Figure 2 The arrangement shown is tilted, with the front lower and the rear higher, or it can be horizontal. The smoke exhaust fan 3 has an air inlet, which faces the side of the centrifugal impeller. One side of the air inlet has a volute section, and the side corresponding to the volute section is a volute tongue section. The air inlet corresponding to the volute section has a large air intake, resulting in a low local negative pressure. Most of the volute section is located to one side of the range hood's centerline. The frontmost portion of the top plate cavity is an electrical component compartment, which houses the range hood's MUC chip, or main control unit. The electrical component compartment also includes a separate cavity, which houses a PM2.5 detection module, or PM2.5 detection device. This separate cavity has an air vent 4 on its upper wall. The PM2.5 detection module has an air induction device that draws outside air into this separate cavity through the air vent 4. The PM2.5 detection module performs PM2.5 testing on the air introduced into this separate cavity and transmits the test results to the range hood main control unit.

[0027] A stove has two burners, one on the left and one on the right, namely a first burner and a second burner, and the first burner and the second burner are symmetrically arranged. The stove is arranged directly below a range hood, with the first burner arranged so that the majority of the corresponding volute section is located on one side of the range hood's centerline, and the second burner arranged so that the majority of the corresponding volute section is located on the other side of the range hood's centerline. The first burner and the second burner each have a corresponding first temperature detection device and a second temperature detection device, respectively, for detecting the temperatures of the first burner and the second burner, respectively. The stove also has a stove main control, which may be a MUC chip. The first temperature detection device and the second temperature detection device are both electrically connected to the stove main control and transmit their detection results to the stove main control.

[0028] like Figure 1 The diagram shows the electrical and communication connections between the various electrical components of the range hood, the various electrical components of the cooker, and between the range hood and the cooker. The variable-frequency motor, PM2.5 detection module, and smoke detector 2 of the smoke exhaust fan 3 are all electrically connected to the range hood's main control unit. The smoke exhaust fan 3 draws cooking fumes into the exhaust duct through the intake port of the range hood housing 1 and exhausts them out through the exhaust port. The smoke detector 2 detects the concentration of the fumes drawn into the exhaust duct and transmits the detection results to the range hood's main control unit. The PM2.5 detection module detects the PM2.5 level in the outside air and transmits the results to the range hood control unit. The range hood control unit has a PM2.5 threshold set in the unit. When the PM2.5 detection module's detection result reaches or exceeds the threshold, it indicates that oil smoke is escaping and requires appropriate measures. For example, the range hood control unit increases the speed of exhaust fan 3. For range hoods with air curtains, the range hood control unit can also increase the speed of the air curtain motor to improve the air curtain's blocking capacity. The first and second temperature detection devices corresponding to the first and second burners of the stove are both electrically connected to the stove control unit and transmit their detection results to the stove control unit. The stove control unit and the range hood control unit are connected in communication via Bluetooth, WiFi, or other methods.

[0029] The range hood master controller receives a status signal from the stove master controller. The status signal includes a first temperature signal and a second temperature signal detected by the first and second temperature detection devices. A threshold temperature is set within the range hood master controller. The range hood master controller compares the received first and second temperature signals with the threshold temperature to determine which burner is currently cooking. For example, when the first temperature signal reaches or exceeds the threshold temperature, the first burner is currently cooking; when the second temperature signal reaches or exceeds the threshold temperature, the second burner is currently cooking; and when both the first and second temperature signals reach or exceed the threshold temperature, both burners are currently cooking. Alternatively, if a threshold temperature is set within the stove master controller, the first and second temperature detection devices transmit the detected first and second temperature signals to the stove master controller. The stove master controller compares the received first and second temperature signals with the threshold temperature set within the range hood master controller to determine which burner is currently cooking and transmits information about the currently cooking burner to the range hood master controller.

[0030] The range hood master controller is internally configured with two smoke thresholds corresponding to the two cooktops: a first smoke threshold and a second smoke threshold. The first smoke threshold corresponds to the first cooktop, while the second smoke threshold corresponds to the second. The first smoke threshold is greater than the second smoke threshold, and the second smoke threshold is only 10-50% of the first smoke threshold. Specifically, the second smoke threshold can be 10%, 14.8%, 17.5%, 25%, 33.6%, 44.6%, 50%, and so on. The specific ratio between the two thresholds should be determined through multiple cooking experiments based on the smoke concentration data detected by the smoke detection device 2 when cooking with different cooktops separately. Alternatively, the range hood master controller can be configured with only one smoke threshold; the specific determination will depend on the smoke and stove linkage control method proposed in subsequent embodiments.

[0031] The range hood's main control unit is internally configured with control parameters corresponding to the two burners. These control parameters include parameters for controlling the variable-frequency motor's rotational speed, specifically, the motor's frequency modulation data. The frequency modulation data corresponding to the first burner is H1, and the frequency modulation data corresponding to the second burner is H2. H1 and H2 can be the same or different, and their specific values ​​will be determined based on the range hood linkage control method proposed in subsequent embodiments.

[0032] Example 2

[0033] This embodiment provides a first smoke and stove linkage control method, which includes the following steps:

[0034] S1: The stove main control detects the temperatures of the two burners through two temperature detection devices. When the temperature of any of the burners exceeds a threshold temperature, the stove main control sends a control message indicating that the burner temperature exceeds the threshold to the range hood main control.

[0035] S2: The range hood master reads the control parameters corresponding to the stove based on the control information. The control parameters include parameters for controlling the rotation speed of the variable frequency motor, such as the frequency modulation change data of the variable frequency motor. The frequency modulation change data corresponding to the first stove is H1, and the frequency modulation change data corresponding to the second stove is H2. The sizes of H1 and H2 are different, and H1 is smaller than H2. The range of H1 is 1Hz-2Hz, and specifically can be 1Hz, 1.2Hz, 1.4Hz, 1.5Hz, 1.75Hz, 1.9Hz, 2Hz, etc. The range of H2 is 2Hz-4Hz, and specifically can be 2Hz, 2.3Hz, 2.65Hz, 2.9Hz, 3.3Hz, 3.75Hz, 4Hz, etc.

[0036] S3: The range hood master controller reads the detection value of the smoke detection device 2. When the detection value exceeds the smoke detection threshold set inside the range hood master controller, the range hood master controller controls the smoke exhaust fan 3 to rotate according to the read control parameters.

[0037] S4. When the PM2.5 detection module detects that the oil smoke concentration in the kitchen air is greater than the preset threshold, the range hood master controller continues to increase the speed of the exhaust fan 3.

[0038] In this method, only one smoke threshold can be set within the range hood control unit. When cooking with the first and second burners, under the same smoke conditions, the time it takes for the smoke detector 2's detection value to reach the smoke threshold may differ. For example, when cooking with the first burner alone, the smoke detector 2's detection value reaches the smoke threshold after 10 seconds, but when cooking with the second burner alone, it takes 12 seconds for the smoke detector 2's detection value to reach the threshold. To increase the speed of the exhaust fan 3 from mid-range to high-range, the range hood control unit controls the variable-frequency motor's speed using H1 for cooking with the first burner, and H2 for cooking with the second burner. Since H2 is greater than H1, by properly setting H2 and H1, the time it takes for the exhaust fan 3's speed to reach high-range from mid-range is consistent regardless of which burner is used. The specific values ​​of H1 and H2 require extensive experimentation and need to be input into the range hood control unit.

[0039] In addition, when it is detected that the temperature of the first stove head exceeds the threshold temperature, it is found that the temperature of the second stove head exceeds the threshold temperature, or when it is detected that the temperature of the second stove head exceeds the threshold temperature, it is found that the temperature of the first stove head exceeds the threshold temperature, the oil fume main control controls the rotation of the smoke exhaust fan 3 according to the frequency modulation change data H2, so as to increase the rotation speed of the smoke exhaust fan 3 more quickly and improve the oil fume removal effect more quickly.

[0040] Example 3

[0041] This embodiment provides a second range hood and stove linkage control method. Two smoke detection thresholds corresponding to the two stove heads are set inside the range hood main control unit, and the two smoke detection thresholds have different values.

[0042] The smoke stove linkage control method includes the following steps:

[0043] S1: The range hood master controller receives a status signal from the stove master controller. The status signal includes temperature signals of two stove heads detected by two temperature detection devices.

[0044] S2: When the range hood master receives a signal that the temperature of any burner exceeds the threshold, it reads the control parameters corresponding to that burner. These control parameters include those controlling the rotational speed of the variable-frequency motor, such as the variable-frequency motor's frequency modulation data. The frequency modulation data corresponding to the first burner is H1, and the frequency modulation data corresponding to the second burner is H2. In this case, H1 and H2 are identical, but they can also be different. In this embodiment, the range of H1 and H2 is between 1Hz and 3Hz.

[0045] S3: The range hood master controller reads the detection value of the smoke detection device 2 and compares it with the smoke detection threshold corresponding to the stove head of the read control parameter. When the detection value exceeds the corresponding smoke detection threshold, the range hood master controller controls the rotation of the smoke exhaust fan 3 according to the read control parameter.

[0046] S4. When the PM2.5 detection module detects that the oil smoke concentration in the kitchen air is greater than the preset threshold, the range hood master controller continues to increase the speed of the exhaust fan 3.

[0047] In this method, two smoke thresholds can be set inside the range hood main control. When cooking through the first burner and the second burner, under the same oil smoke conditions, the time for the detection value of the smoke detection device 2 to reach the same concentration value may be different. For example, when using the first burner alone for cooking, it takes 10 seconds to reach a concentration of 3000 mg / cubic meter, and when using the second burner alone for cooking, it takes 15 seconds to reach a concentration of 3000 mg / cubic meter. However, when using the second burner alone for cooking, it also takes 10 seconds to reach a concentration of 500 mg / cubic meter. We can set the first smoke threshold to 3000 mg / cubic meter and the second smoke threshold to 500 mg / cubic meter. In this way, when H2 is equal to H1, no matter which burner is used for cooking alone, the time for the exhaust fan 3 to reach high speed from medium speed is the same.

[0048] In some exemplary embodiments, the range hood master controller is configured with a first smoke threshold and a second smoke threshold corresponding to each of the two burners, with the first smoke threshold being greater than the second. When cooking with either burner alone, the time it takes to reach the corresponding smoke threshold varies. Cooking with the first burner alone can reach the smoke threshold faster than cooking with the second burner alone. In this case, to ensure that the speed of the smoke exhaust fan 3 reaches high speed from medium speed to medium speed at the same time, it is necessary to balance the speed using different frequency modulation data, H1, and H2. In this case, H1 is less than H2. The specific values ​​of H1 and H2 require extensive experimentation to determine and input into the range hood master controller. In this case, if the temperature of the first burner exceeds the threshold temperature and the second burner also exceeds the threshold temperature, or if the temperature of the second burner exceeds the threshold temperature and the first burner also exceeds the threshold temperature, the control system will operate according to the frequency modulation data H2 and use the first smoke threshold to more quickly increase the speed of the smoke exhaust fan 3 and improve the oil fume removal effect.

[0049] To sum up, the present invention improves and optimizes the control method of the smoke and stove linkage, so that users can obtain the same cooking experience when cooking through any burner of the stove, and determines the specific control parameters through experiments, which can effectively avoid the problem of poor cooking experience for users.

[0050] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for controlling a smoke and stove linkage, wherein a stove master control of a stove is connected to a range hood master control of a range hood, characterized in that: The range hood includes a range hood housing, a smoke exhaust duct formed in the range hood housing, a smoke detection device and a smoke exhaust fan disposed in the smoke exhaust duct, a motor driving the smoke exhaust fan being a variable frequency motor, and the stove having at least two burners including temperature detection devices; The steps include: S1: The stove master controller detects the temperatures of the two burners through two temperature detection devices. When the temperature of the first burner exceeds a threshold temperature, the stove master controller sends a control message indicating that the temperature of the first burner exceeds the threshold to the range hood master controller. S2: The range hood master controller reads the control parameters corresponding to the first stove head according to the control information; S3: The range hood master controller reads the detection value of the smoke detection device. When the detection value exceeds the smoke detection threshold, the range hood master controller controls the exhaust fan to rotate according to the control parameter corresponding to the first stove head. In step S1, the stove main control detects the temperatures of the two burners. When the temperature of the first burner does not exceed the threshold temperature, but the temperature of the second burner exceeds the threshold temperature, the stove main control sends control information that the temperature of the second burner exceeds the threshold to the range hood main control. The range hood main control reads the control parameters corresponding to the second burner according to the control information; the range hood main control reads the detection value of the smoke detection device. When the detection value exceeds the smoke detection threshold, the range hood main control controls the rotation of the smoke exhaust fan according to the control parameters corresponding to the second burner. The control parameters corresponding to the second burner are different from the control parameters corresponding to the first burner, and different burners are used for cooking separately. The time for the smoke exhaust fan speed to reach high speed from medium speed is the same.

2. A smoke and stove linkage control method according to claim 1, characterized in that: The range hood housing of the range hood has an air intake port, which is symmetrically arranged on the left and right. The air intake port is connected to the air exhaust port arranged on the range hood housing, and a smoke exhaust duct is formed by connecting the air intake port to the air exhaust port. A smoke exhaust fan is also arranged in the smoke exhaust duct, and the smoke exhaust fan has a centrifugal wind wheel and a volute arranged outside it.

3. The smoke and stove linkage control method according to claim 2, characterized in that: The axis of the centrifugal wind wheel is horizontal or inclined with the front lower and the rear higher. The smoke exhaust fan has an air inlet, which is opposite to the side of the centrifugal wind wheel. One side of the air inlet is provided with a volute section, and the side corresponding to the volute section is a volute tongue section; the air inlet corresponding to the volute section has a large air suction volume, so that the local negative pressure is low, and most of the area of ​​the volute section is located on one side of the center line of the smoke exhaust fan.

4. The smoke and stove linkage control method according to claim 1, characterized in that: The control parameters corresponding to the first stove include parameters for controlling the rotation speed of the variable frequency motor, including frequency modulation change data H1 of the variable frequency motor, and the range of H1 is 1 Hz-2 Hz.

5. The smoke and stove linkage control method according to claim 4, characterized in that: The control parameters corresponding to the second cooking head include parameters for controlling the rotation speed of the variable frequency motor, including frequency modulation change data H2 of the variable frequency motor, and the range of H2 is 2Hz-4Hz.

6. The smoke and stove linkage control method according to claim 3, characterized in that: The first stove head is arranged on one side of the center line of the range hood in a region corresponding to most of the volute section, and the second stove head is arranged on the other side of the center line of the range hood in a region corresponding to most of the volute section.

7. The smoke and stove linkage control method according to claim 6, characterized in that: The smoke threshold includes a first smoke threshold corresponding to the first stove head, and also includes a second smoke threshold corresponding to the second stove head. The first smoke threshold is greater than the second smoke threshold, and the second smoke threshold is only 10-50% of the first smoke threshold.

8. The smoke and stove linkage control method according to claim 5, characterized in that: When it is detected that the temperature of the first burner exceeds the threshold temperature, it is also found that the temperature of the second burner exceeds the threshold temperature, or when it is detected that the temperature of the second burner exceeds the threshold temperature, it is also found that the temperature of the first burner exceeds the threshold temperature, then it operates according to the frequency modulation change data H2.

9. The smoke and stove linkage control method according to claim 6, characterized in that: The range hood has a PM2.5 detection module electrically connected to the range hood main control. When the PM2.5 detection module detects that the oil smoke concentration in the kitchen air is greater than a preset threshold, the range hood main control increases the speed of the exhaust fan.

Images