Range hood

Abstract

The range hood comprises a range hood outer cover (1), a volute (2) arranged in the range hood outer cover (1) and an exhaust fume collecting hood (3) arranged below the range hood outer cover (1), a fume deflector (4) is arranged in the exhaust fume collecting hood (3), an oil filter screen (5) and a refrigeration element (6) are arranged above the fume deflector (4), and the refrigeration element (6) is located between the oil filter screen (5) and the volute (2) and arranged in the middle of the oil filter screen (5). The device has the advantages that compared with the prior art in which the refrigeration element is placed between the smoke deflector and the oil filter screen, the wiring space in which the refrigeration element is arranged between the smoke deflector and the fan system is larger, so that the wiring difficulty is reduced; the orthographic projection of the refrigerating element on the middle part of the oil filter screen shields the central weak oil smoke adsorption area, so that the static pressure value of the peripheral edge of the oil filter screen is larger, the range hood has a stronger smoke suction effect, and the range hood has the advantages of simple wiring and high oil smoke suction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen cookware, and particularly to a range hood. Background Art

[0002] Range hoods play a crucial role in household kitchens. They can suck away the spiciness and various fumes generated during stir-frying, protecting the health of family members. "Oil separation rate" is one of the important indicators of range hoods. The larger the oil separation rate, the smaller the number of oil fume particles in the oil fume gas discharged by the range hood. In high-rise housing with a common flue, this is particularly important. When a large amount of oil fume passes through the common flue, a large amount of old oil will accumulate on the wall of the common flue. Over time, the flue will become narrow and the probability of flue fire will also increase significantly.

[0003] Currently, the oil separation rate of European-style range hoods is mainly affected by the smoke guide plate, oil mesh and impeller. When the oil fume rises at high speed, it first hits the smoke guide plate. Some high-speed large-particle oil fume particles condense on the smoke guide plate. After the oil fume bypasses the smoke guide plate, it is sucked into the range hood by the negative pressure of the range hood, passes through the oil mesh, and the oil mesh can filter out some oil fume particles to a certain extent. Finally, the oil fume enters the range hood and collides with the high-speed rotating impeller, and then stays on the pressure surface of the impeller. Some will be thrown to the volute by centrifugal force and return to the oil cup of the range hood through the oil guide plate. However, the residual oil fume on the impeller will reduce the clearance between the impeller blades, resulting in a decrease in the air volume of the range hood, a weakening of the oil fume suction effect, an offset of the noise value, and even more seriously, an imbalance in the dynamic balance of the impeller, generating abnormal noises. These problems can only be solved by cleaning the impeller of the range hood. If the filtering and adsorption efficiency of the smoke guide plate and the oil mesh can be increased, the cleaning time of the impeller of the range hood will be extended, and the overall oil separation degree of the range hood will be increased.

[0004] For European-style range hoods, there are currently many technical means to increase the oil separation degree of oil fume, such as high-voltage electrostatic adsorption. This technology has a high adsorption effect on oil fume particles, but high-voltage static electricity easily causes the surrounding metal plates to be charged, making it easy for users to be electrocuted and also easy to damage the low-voltage circuit board. Although it is not difficult to avoid these problems in technical means, it will cost a high price.

[0005] In view of the above problems, a Chinese invention application with a patent number of CN201710703360.1 (publication number of CN109405001A) discloses a range hood that improves the oil separation degree and reduces the oil stains on the surface of the blades and the volute. This application places a semiconductor refrigeration sheet on the smoke guide plate through a condensation technology, and to a large extent, fixes the oil fume particles on the surface of the smoke guide plate through the condensation technology. However, in the design, the electrical connection components are placed on the smoke guide plate, and its narrow space will increase the wiring difficulty and the installation difficulty of the butterfly wing plate, increasing the cleaning cost. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a range hood with a large wiring space in view of the above technical status quo.

[0007] The technical solution adopted by the present invention to solve the above technical problem is as follows: The range hood includes: a hood outer casing, a volute is provided inside the hood outer casing, and a smoke collecting hood is provided below the hood outer casing. A smoke guiding plate is provided inside the smoke collecting hood, and an oil filtering net is provided above the smoke guiding plate. It is characterized in that it further includes:

[0008] A refrigeration element, which is located between the oil filtering net and the volute and is provided in the middle of the oil filtering net.

[0009] In order to achieve high-efficiency condensation of oil fume in the range hood, preferably, the refrigeration element is a semiconductor refrigeration module. A heat conducting member is connected between the smoke guiding plate and the oil filtering net, and the top end of the heat conducting member is close to or in contact with the refrigeration element. In this technical solution, the semiconductor characteristics of the refrigeration element enable it to have good heat conduction performance, and it is quickly conducted to the smoke guiding plate through the adjacent heat conducting member. When the range hood inhales oil fume and meets the smoke guiding plate, the oil fume condenses and releases heat and condenses into oil droplets on the surface of the smoke guiding plate.

[0010] In order to facilitate the installation and cleaning of the smoke guiding plate, preferably, the heat conducting member is magnetically connected to the smoke guiding plate, and the material of the heat conducting member is a magnetic material. In this technical solution, the setting of the magnetic heat conducting member facilitates the disassembly and installation of the user. At the same time, the magnetic material of the heat conducting member also has good heat conduction performance, improving the condensation efficiency of the range hood and having the advantage of "two functions in one".

[0011] Further, the refrigeration element is adhered to the oil filtering net through a heat conducting glue.

[0012] Further, the volute is in contact with and limits the position of the top of the refrigeration element.

[0013] In order to prevent the heat conducting member from moving due to a large wind pressure when the range hood is working, preferably, at least one of the smoke guiding plate and the oil filtering net is provided with a positioning groove, and the heat conducting member is adapted to the positioning groove. The setting of the positioning groove includes setting a positioning groove under the middle of the oil filtering net, setting a positioning groove on the middle of the smoke guiding plate, and setting positioning grooves on the opposite surfaces of the oil filtering net and the smoke guiding plate.

[0014] In order to reduce the noise when the range hood is working, preferably, the edge of the smoke guiding plate is bent and formed. The smoke guiding plate in this technical solution increases its own rigidity by bending, reducing the amplitude of its own vibration when the air flow passes through.

[0015] To improve the cleanliness of the range hood, preferably, the surfaces of the smoke guide plate and the oil filter net are coated with super-hydrophobic and super-oleophobic materials. This technical solution reduces the adhesion force between the condensed oil and the surfaces of the smoke guide plate and the oil filter net, making it easier to collect and clean the oil droplets.

[0016] To achieve power control of the refrigeration element, preferably, the refrigeration element is connected to a controller, which is fixed to the inner wall of the range hood outer casing or the smoke collecting hood and is connected to a sensor. The sensor includes a temperature sensor and a wind speed sensor. In this technical solution, the controller adjusts the refrigeration power of the refrigeration element by receiving the physical parameters of the oil fume temperature and wind speed from the sensor.

[0017] To enable the sensor to detect the temperature and wind speed of the oil fume in real time, preferably, the sensor is arranged in front of the oil filter net, and the sensing probe of the sensor is arranged at the smoke inlet of the oil filter net.

[0018] Compared with the prior art, the advantages of the present invention are as follows: The wiring space between the smoke guide plate and the volute for the refrigeration element is larger than that in the prior art where the refrigeration element is placed between the smoke guide plate and the oil filter net, reducing the wiring difficulty; The refrigeration element arranged in the middle of the oil filter net blocks the central weak oil fume adsorption area, resulting in a greater static pressure value at the four peripheral edges of the oil filter net, making the range hood have a stronger smoke suction effect, with the advantages of simple wiring and high oil fume suction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 is an exploded view of the structure of an embodiment of the present invention;

[0021] Figure 3 is a longitudinal sectional view of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further described in detail below with reference to the embodiments in the drawings.

[0023] As Figures 1 to 3 shown, it is a preferred embodiment of the present invention. The range hood of this embodiment is mainly used to suck the oil fume generated during kitchen cooking. The range hood converts the oil fume into oil droplets for collection by means of condensation and heat release. The refrigeration element with a condensation function needs to function through a controller, and both are arranged inside the range hood. In the prior art, although the direct connection between the refrigeration element and the smoke guide plate can play the role of condensing the oil fume, the space between the smoke guide plate and the oil filter net is small, making it difficult to wire the refrigeration element. The dense wiring is also inconvenient for maintenance and installation of the smoke guide plate. Therefore, it will be beneficial to provide a range hood with simple wiring. The structure of this range hood will be elaborated below:

[0024] Refer to Figures 1 through 3 , this range hood includes a range hood outer cover 1, a volute 2 is provided inside the range hood outer cover 1, and a smoke collecting hood 3 is provided below the range hood outer cover 1. A smoke guiding plate 4 is provided inside the smoke collecting hood 3, an oil filtering net 5 is provided above the smoke guiding plate 4, and a refrigeration element 6 is provided between the oil filtering net 5 and the volute 2 and is arranged in the middle of the oil filtering net 5. The front end of the oil filtering net 5 is partially concave, and the refrigeration element 6 is installed on the inclined surface of the concave part at the front end of the oil filtering net 5, further increasing the wiring space of the refrigeration element 6. A chimney for discharging oil fumes is provided above the range hood outer cover 1, and at the same time, the installation area of the refrigeration element 6 is a central weak oil fume adsorption area; an oil collecting tank is installed at the lower end of the rear plate of the smoke collecting hood 3, and the oil collecting tank is directly opposite to the rear end of the smoke guiding plate 4.

[0025] The refrigeration element 6 in this embodiment is a semiconductor refrigeration module. A heat conducting member 51 is connected between the smoke guiding plate 4 and the oil filtering net 5, and the top end of the heat conducting member 51 is close to or in contact with the refrigeration element 6. The semiconductor characteristics of the refrigeration element 6 enable it to have good heat conducting performance, and it is quickly conducted to the smoke guiding plate 4 through the adjacent heat conducting member 51. When the range hood inhales oil fumes and meets the smoke guiding plate 4, the oil fumes condense and release heat and condense into oil droplets on the surface of the smoke guiding plate 4, so as to achieve high-efficiency condensation of oil fumes inside the range hood.

[0026] The heat conducting member 51 in this embodiment is magnetically connected to the smoke guiding plate 4, and the material of the heat conducting member 51 is a magnetic material. The setting of the magnetic heat conducting member 51 facilitates the disassembly and installation of the user. At the same time, the magnetic material of the heat conducting member 51 also has good heat conducting performance, improving the condensation efficiency of the range hood and having the advantage of "serving two purposes" to facilitate the installation and cleaning of the smoke guiding plate 4. The number of the heat conducting members 51 is 1.

[0027] In this embodiment, the refrigeration element 6 is adhered to the oil filtering net 5 through heat conducting glue.

[0028] In this embodiment, the volute 2 is in contact with and limited to the top of the refrigeration element 6. A blower system for generating a pressure difference to inhale oil fumes is also provided above the volute 2.

[0029] In order that the heat conducting member 51 will not move due to a large wind pressure when the range hood is working, a positioning groove is provided below the middle of the oil filtering net 5 in this embodiment, and the heat conducting member 51 is adapted to the positioning groove. The setting of the positioning groove also includes setting a positioning groove in the middle of the smoke guiding plate 4 and setting positioning grooves on the opposite surfaces of the oil filtering net 5 and the smoke guiding plate 4. Figure 3 Only the situation of setting the positioning groove below the oil filtering net 5 is drawn in the figure. The above description of the other two situations has been explained in words and is relatively common, so no additional drawings are provided.

[0030] The edge of the smoke guide plate 4 in this embodiment is bent and formed. The smoke guide plate 4 increases its own rigidity through bending, reduces the amplitude of its own vibration when the air flow passes through, and reduces the noise during the operation of the range hood.

[0031] The surfaces of the smoke guide plate 4 and the oil filter net 5 in this embodiment are both coated with superhydrophobic and oleophobic materials, which reduces the adhesion force between the condensed oil and the surfaces of the smoke guide plate 4 and the oil filter net 5, making it easier to collect and clean the oil droplets and improving the cleanliness of the range hood.

[0032] In this embodiment, the refrigeration element 6 is connected to the controller 7. The controller 7 is fixed to the inner wall of the range hood housing 1 or the smoke collecting hood 3 and is connected to the sensor 8. The sensor 8 includes a temperature sensor and a wind speed sensor. The controller 7 adjusts the refrigeration power of the refrigeration element 6 by receiving the physical parameters of the oil fume temperature and wind speed from the sensor 8 to achieve power control of the refrigeration element 6. The control logic of the controller 7 is to establish a relationship between the wind speed and the flue gas temperature measured by the sensor 8 and the oil separation rate, and maintain the energy consumption of the refrigeration element 6 at the optimal level.

[0033] Finally, in this embodiment, the sensor 8 is arranged in front of the oil filter net 5, and the sensing probe of the sensor 8 is arranged at the smoke inlet of the oil filter net 5 to enable the sensor 8 to detect the temperature and wind speed of the oil fume in real time. Among them Figure 3 Area A below the smoke inlet is the best wind sensing area.

[0034] In summary, this range hood can achieve the following technical effects:

[0035] a. Convenient wiring

[0036] The refrigeration element 6 is installed between the oil filter net 5 and the volute 2 and is connected to both. Moreover, the structure that the front end of the oil filter net 5 inclines downward and inward further increases the distance between the oil filter net 5 and the volute 2, which is significantly larger than the space when installed on the smoke guide plate 4. A wire routing box is also provided to organize the lines, making the wiring more convenient.

[0037] b. Noise reduction

[0038] Since the smoke guide plate 4 is only fixed in the center by a single magnetic heat conducting part 51, during the process of high-speed suction of oil fume, the edge of the smoke guide plate 4 may vibrate, increasing the risk of noise. Therefore, the edge of the smoke guide plate 4 is folded and pressed to increase the rigidity of the smoke guide plate 4 and reduce the noise.

[0039] c. Good cleanliness

[0040] After the oil filter net 5 has a significant increase in the oil fume absorption efficiency, it will bring the problem that the oil fume on the oil net is not easy to clean. In the process design, superhydrophobic and oleophobic materials are selected to coat the smoke guide plate 4 and the oil filter net 5, reducing the adhesion force between the condensed oil and the smoke guide plate 4 and the oil filter net 5, and enabling the condensed oil to quickly flow into the oil collecting tank.

[0041] d. The smoke guide plate 4 is convenient for cleaning:

[0042] The connection method between the smoke guide plate 4 and the oil filter net 5 is magnetic attraction connection, which is convenient for disassembly and facilitates manual disassembly and cleaning of the smoke guide plate 4 alone.

[0043] e. High oil fume extraction efficiency

[0044] The refrigeration element 6 is arranged in the central weak oil fume adsorption area in the smoke collecting hood 3, which results in a greater static pressure value at the four peripheral edges of the oil filter net 5, making the range hood have a stronger smoking effect.

[0045] f. Reduce power consumption under the condition of achieving a high oil separation degree:

[0046] A relationship is established among the wind speed, flue gas temperature and oil separation rate measured by the sensor 8, and all the logics are received and sent by the controller 7 to control the working power of the refrigeration element 6 in real time, so that the temperature and wind speed of the incoming air are kept within a reasonable range, and the energy consumption of the refrigeration element 6 is maintained at the optimum during the whole process of sucking fume.

Claims

1. An oil fume suction machine, comprising: an outer cover (1) of the suction machine, a volute (2) is arranged inside the outer cover (1) of the suction machine, and a smoke collecting hood (3) is arranged below the outer cover (1) of the suction machine. A smoke guiding plate (4) is arranged inside the smoke collecting hood (3), and an oil filtering net (5) is arranged above the smoke guiding plate (4), characterized in that, Further included are: A refrigeration element (6), which is located between the oil filter screen (5) and the volute (2) and is provided in the middle of the oil filter screen (5).

2. The range hood according to claim 1, wherein: The refrigeration element (6) is a semiconductor refrigeration module. A heat conducting member (51) is connected between the smoke guiding plate (4) and the oil filter screen (5), and the top end of the heat conducting member (51) is close to or in contact with the refrigeration element (6).

3. The range hood according to claim 2, characterized in that: The heat conducting member (51) is magnetically connected to the smoke guiding plate (4), and the material of the heat conducting member (51) is a magnetic material.

4. The range hood according to claim 3, characterized in that: The refrigeration element (6) is adhered to the oil filter screen (5) through heat conducting glue.

5. The range hood according to claim 4, wherein: The volute (2) is in contact with and limits the position of the top of the refrigeration element (6).

6. The range hood according to claim 2, characterized in that: At least one of the smoke guiding plate (4) and the oil filter screen (5) is provided with a positioning groove, and the heat conducting member (51) is adapted to the positioning groove.

7. The range hood according to claim 6, wherein: The edge of the smoke guiding plate (4) is bent and formed.

8. The range hood according to claim 7, wherein: The surfaces of the smoke guiding plate (4) and the oil filter screen (5) are both coated with super-hydrophobic and super-oleophobic materials.

9. The range hood according to claim 1, wherein: The refrigeration element (6) is connected to a controller (7), which is fixed on the inner wall of the range hood outer cover (1) or the smoke collecting hood (3) and is connected to a sensor (8). The sensor (8) includes a temperature sensor and an air velocity sensor.

10. The range hood according to claim 9, wherein: The sensor (8) is provided in front of the oil filter screen (5), and the sensing probe of the sensor (8) is provided at the smoke inlet of the oil filter screen (5).

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