Range hood

Abstract

The utility model discloses a range hood which comprises a range hood body, the range hood body comprises an electrical equipment cavity and an exhaust air duct, the electrical equipment cavity is used for placing electrical parts of the range hood, the exhaust air duct and the electrical equipment cavity are arranged adjacently and separately, and the range hood further comprises a wind wheel and a fan, the wind wheel is arranged in the exhaust duct, and the wind wheel is arranged to be driven by wind in the exhaust duct to rotate when the range hood works; the fan is arranged in the electrical equipment cavity, the fan is connected with the wind wheel through a rotating shaft, and the fan is arranged to rotate synchronously when the wind wheel rotates so as to provide wind for the electrical equipment cavity. Through the structure of the wind wheel and the fan, the wind wheel is driven to drive the fan blades of the fan to rotate by utilizing the kinetic energy of smoke exhausted by the range hood, so that air flow in the electrical equipment cavity is promoted, and heat dissipation is performed on parts with high heat productivity in the electrical equipment cavity.

Description

Technical Field

[0001] The utility model relates to a range hood. Background Art

[0002] Nowadays, people have higher and higher requirements for the oil fume extraction effect of range hood products. On the one hand, the power of range hood products is gradually increasing, and on the other hand, the range hoods on the market are moving towards variable frequency. In variable frequency motor controllers, power devices mostly use Mosfet or IPM intelligent power modules, both of which have switching losses and flow losses, and the lost energy exists in the form of heat; in order to control the device temperature not to exceed the maximum operating temperature required by its specifications, fin heat sinks are generally used to dissipate heat from the device.

[0003] As the power of the inverter increases, a stronger heat dissipation method is needed. The conventional methods are:

[0004] One way is to increase the size of the aluminum fin heat sink. The larger heat exchange area brings better heat dissipation effect. The problem with this method is that it is restricted by the overall shape of the machine. The inverter of the range hood needs to be installed in a closed manner to avoid pollution from condensation of oil smoke. The air in the electrical box is in a static state. Increasing the size of the heat dissipation fins alone will not have a good effect.

[0005] Another way is to add a heat dissipation EC fan to remove the heat by forced air flow. Even if the electrical box is sealed, the air circulation inside can produce significant results. However, the EC fan requires power supply and control signals, which increases the complexity of the electronic control system. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a range hood with a simple structure and good heat dissipation effect without increasing the size of the radiator of the inverter or adding a fan.

[0007] The utility model solves the above technical problems through the following technical solutions:

[0008] A range hood, comprising a range hood body, the range hood body comprising an electrical equipment cavity and an exhaust duct, the electrical equipment cavity being used to place electrical components of the range hood, the exhaust duct being adjacent to and isolated from the electrical equipment cavity, the range hood further comprising:

[0009] a wind wheel, the wind wheel being arranged in the exhaust air duct, and the wind wheel being arranged to be driven to rotate by the wind in the exhaust air duct when the range hood is working;

[0010] A fan is arranged in the electrical equipment cavity, the fan is connected to the wind wheel through a rotating shaft, and the fan is arranged to rotate synchronously when the wind wheel rotates to provide wind into the electrical equipment cavity.

[0011] In this solution, the structure of the wind wheel plus the fan utilizes the kinetic energy of the smoke exhausted by the range hood to drive the wind wheel to drive the fan blades to rotate, thereby promoting the air flow in the electrical equipment cavity and dissipating the heat of the components with high heat generation in the electrical equipment cavity. On the one hand, the size of the heat dissipation fins in the electrical equipment cavity is increased, and on the other hand, there is no need to add a heat dissipation EC fan. The structure is simple and the heat dissipation effect is good. While utilizing the kinetic energy of the smoke exhausted by the range hood, it also prevents the exhaust gas exhausted by the range hood from blowing directly on the radiator to condense grease and water vapor, causing circuit failure.

[0012] Preferably, the electrical equipment cavity is provided with a bracket, the bracket is provided with a bearing, and the rotating shaft passes through the bearing.

[0013] In this solution, the wind wheel and the rotating shaft of the fan drive are supported by brackets and bearings, which ensures the stability of the transmission and prevents the rotating shaft from being worn due to long-term rotation.

[0014] Preferably, the bracket is a U-shaped structure, and a bearing is provided on two opposite side walls of the bracket, and the rotating shaft passes through the two bearings.

[0015] In this solution, the above structure is adopted to further ensure the stability of the transmission, and the installation of two bearings on the bracket can reduce the energy loss of the rotation of the shaft.

[0016] Preferably, the exhaust air duct comprises an air outlet cylinder, the air outlet cylinder passes through the electrical equipment cavity, and the wind wheel is arranged in the air outlet cylinder;

[0017] The rotating shaft passes through the cylinder wall of the air outlet cylinder and is connected to the wind wheel. The rotating shaft and the cylinder wall of the air outlet cylinder are circumferentially sealed, and the rotating shaft can rotate relative to the cylinder wall of the air outlet cylinder.

[0018] In this solution, the above structure is adopted, and the impeller is arranged in a section of the air outlet of the exhaust duct. Since the smoke of the range hood is finally gathered in the air outlet and then discharged through the exhaust pipe, the wind force in the air outlet is relatively large, so that the impeller can obtain greater power and enhance the heat dissipation effect. The rotating shaft and the wall of the air outlet are circumferentially sealed to prevent smoke from entering the electrical equipment cavity.

[0019] Preferably, the fan is made of plastic.

[0020] In this solution, the fan is made of plastic, is light in weight, and is easy to drive.

[0021] Preferably, the range hood further comprises a frequency converter, the frequency converter is arranged in the electrical equipment cavity, the frequency converter is further provided with heat dissipation fins, and the fan is arranged to face the heat dissipation fins.

[0022] In this solution, the fan is arranged toward the heat dissipation fins, so that the heat of the heat dissipation fins can be quickly taken away, thereby enhancing the heat dissipation effect.

[0023] Preferably, there are a plurality of heat dissipation fins, the plurality of heat dissipation fins are arranged in parallel, and the rotation axis is parallel to the heat dissipation fins and perpendicular to the arrangement direction of the heat dissipation fins.

[0024] In this solution, the above structure is adopted to enhance the heat dissipation effect.

[0025] Preferably, the inverter includes a PCP board and a plurality of power devices, the heat dissipation fins are arranged on the power devices to be cooled, and the power devices to be cooled are arranged near the side edge of the PCB board.

[0026] In this solution, the above structure is adopted, and the power device is close to the edge of the PCB board, so as to cooperate with the heat dissipation device to form a circulation inside the closed electrical equipment cavity to achieve the best heat dissipation effect.

[0027] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0028] The positive and progressive effects of the utility model are:

[0029] The utility model uses a wind wheel plus a fan structure, utilizes the kinetic energy of smoke exhausted by the range hood, drives the wind wheel to drive the fan blades to rotate, promotes air flow in the electrical equipment cavity, and dissipates heat for components with high heat generation in the electrical equipment cavity. On the one hand, the size of the heat dissipation fins in the electrical equipment cavity that are not needed is increased, and on the other hand, there is no need to add a heat dissipation EC fan. The structure is simple and the heat dissipation effect is good. While utilizing the kinetic energy of smoke exhausted by the range hood, it also avoids the exhaust gas exhausted by the range hood from being directly blown onto the radiator to condense grease and water vapor, causing circuit failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the range hood in the utility model.

[0031] Figure 2 for Figure 1 Cross-sectional view of a mid-range hood.

[0032] Figure 3 It is a schematic diagram of the cooperation between the wind wheel and the fan in the utility model.

[0033] Figure 4This is a schematic diagram of the installation positions of the heat dissipation fins and power devices on the PCB board in an embodiment of the utility model.

[0034] Description of reference numerals:

[0035] Range hood body 100

[0036] Electrical equipment chamber 110

[0037] Exhaust duct 120

[0038] Air outlet 121

[0039] Wind wheel 200

[0040] Fan 300

[0041] Shaft 400

[0042] Bracket 500

[0043] Inverter 600

[0044] PCB board 610

[0045] Cooling fin 700 DETAILED DESCRIPTION

[0046] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0047] like Figure 1-4 As shown, a range hood of the present embodiment comprises a range hood body 100, the range hood body 100 comprises an electrical equipment cavity 110 and an exhaust duct 120, the electrical equipment cavity 110 is used to place electrical components of the range hood, the exhaust duct 120 is arranged adjacent to and isolated from the electrical equipment cavity 110, the range hood further comprises a wind wheel 200 and a fan 300, the wind wheel 200 is arranged in the exhaust duct 120, the wind wheel 200 is arranged to rotate by the wind in the exhaust duct 120 when the range hood is working; the fan 300 is arranged in the electrical equipment cavity 110, the fan 300 is connected to the wind wheel 200 via a rotating shaft 400, the fan 300 is arranged to rotate synchronously when the wind wheel 200 rotates to provide wind into the electrical equipment cavity 110.

[0048] Through the structure of the wind wheel 200 plus the fan 300, the kinetic energy of the smoke exhausted by the range hood is utilized to drive the wind wheel 200 to drive the blades of the fan 300 to rotate, thereby promoting the air flow in the electrical equipment cavity 110 and dissipating the heat of the components with high heat generation in the electrical equipment cavity 110. On the one hand, the size of the heat dissipation fins 700 in the electrical equipment cavity 110 is not required to be increased, and on the other hand, there is no need to add the heat dissipation EC fan 300. The structure is simple and the heat dissipation effect is good. While utilizing the kinetic energy of the smoke exhausted by the range hood, it also prevents the exhaust gas exhausted by the range hood from being directly blown onto the radiator to condense grease and water vapor, thereby causing circuit failure.

[0049] The electrical equipment chamber 110 is provided with a bracket 500, on which a bearing is provided, and the rotating shaft 400 passes through the bearing. The bracket 500 and the bearing support the rotating shaft 400 for driving the wind wheel 200 and the fan 300, thereby ensuring the stability of the transmission and preventing the rotating shaft 400 from being worn due to long-term rotation.

[0050] In this embodiment, the bracket 500 is a U-shaped structure, and a bearing is provided on each of the two opposite side walls of the bracket 500, and the rotating shaft 400 passes through the two bearings. The above structure further ensures the stability of the transmission, and the installation of two bearings on the bracket 500 can reduce the energy loss of the rotating shaft 400.

[0051] The exhaust air duct 120 includes an air outlet 121, which passes through the electrical equipment cavity 110, and a wind wheel 200 is arranged in the air outlet 121; the rotating shaft 400 passes through the cylinder wall of the air outlet 121 and is connected to the wind wheel 200, and the rotating shaft 400 is circumferentially sealed with the cylinder wall of the air outlet 121, and the rotating shaft 400 can rotate relative to the cylinder wall of the air outlet 121. In this embodiment, by arranging the wind wheel 200 in a section of the air outlet 121 of the exhaust air duct 120, since the smoke of the range hood is finally gathered in the air outlet 121 and then discharged through the smoke exhaust pipe, the wind force in the air outlet 121 is relatively large, so that the wind wheel 200 can obtain greater power and enhance the heat dissipation effect. The rotating shaft 400 is circumferentially sealed with the cylinder wall of the air outlet 121, which can prevent smoke from entering the electrical equipment cavity 110.

[0052] In this embodiment, the fan 300 is made of plastic. The fan 300 is made of plastic, which is light and easy to drive. The wind wheel 200 can also be made of plastic, or both can be made of light metal or metal alloy, such as aluminum alloy.

[0053] The range hood further includes an inverter 600, which is disposed in the electrical equipment cavity 110. The inverter 600 is also provided with heat dissipation fins 700, and the fan 300 is arranged to face the heat dissipation fins 700. Arranging the fan 300 toward the heat dissipation fins 700 can quickly take away the heat of the heat dissipation fins 700, thereby enhancing the heat dissipation effect.

[0054] In this embodiment, there are multiple heat dissipation fins 700, and the multiple heat dissipation fins 700 are arranged in parallel, and the rotation shaft 400 is parallel to the heat dissipation fins 700 and perpendicular to the arrangement direction of the heat dissipation fins 700. The above structure can enhance the heat dissipation effect.

[0055] like Figure 4 As shown, the inverter 600 includes a PCP board and a plurality of power devices, and the heat dissipation fins 700 are arranged on the power devices to be dissipated, and the power devices to be dissipated are arranged near the side edge of the PCB board 610. With the above structure, the power devices are close to the edge of the PCB board 610, so as to cooperate with the heat dissipation device to form a circulation inside the closed electrical equipment cavity 110 (as indicated by the arrows in the figure), so as to achieve the best heat dissipation effect.

[0056] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A range hood, comprising a range hood body, wherein the range hood body comprises an electrical equipment cavity and an exhaust duct, wherein the electrical equipment cavity is used to place electrical components of the range hood, and wherein: The exhaust duct is adjacent to and isolated from the electrical equipment cavity, and the range hood further comprises: a wind wheel, the wind wheel being arranged in the exhaust air duct, and the wind wheel being arranged to be driven to rotate by the wind in the exhaust air duct when the range hood is working; A fan is arranged in the electrical equipment cavity, the fan is connected to the wind wheel through a rotating shaft, and the fan is arranged to rotate synchronously when the wind wheel rotates to provide wind into the electrical equipment cavity.

2. The range hood according to claim 1, characterized in that: The electrical equipment cavity is provided with a bracket, the bracket is provided with a bearing, and the rotating shaft passes through the bearing.

3. The range hood according to claim 2, characterized in that: The bracket is a U-shaped structure, and a bearing is provided on two opposite side walls of the bracket, and the rotating shaft passes through the two bearings.

4. The range hood according to claim 1, characterized in that: The exhaust air duct comprises an air outlet cylinder, the air outlet cylinder passes through the electrical equipment cavity, and the wind wheel is arranged in the air outlet cylinder; The rotating shaft passes through the cylinder wall of the air outlet cylinder and is connected to the wind wheel. The rotating shaft and the cylinder wall of the air outlet cylinder are circumferentially sealed, and the rotating shaft can rotate relative to the cylinder wall of the air outlet cylinder.

5. The range hood according to claim 1, characterized in that: The fan is made of plastic.

6. The range hood according to any one of claims 1 to 5, characterized in that: The range hood further comprises a frequency converter, which is arranged in the electrical equipment cavity. The frequency converter is also provided with heat dissipation fins, and the fan is arranged to face the heat dissipation fins.

7. The range hood according to claim 6, characterized in that: There are a plurality of heat dissipation fins, which are arranged in parallel, and the rotating shaft is parallel to the heat dissipation fins and perpendicular to the arrangement direction of the heat dissipation fins.

8. The range hood according to claim 7, characterized in that: The frequency converter comprises a PCP board and a plurality of power devices. The heat dissipation fins are arranged on the power devices that need to dissipate heat. The power devices that need to dissipate heat are arranged near the side edge of the PCB board.

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