Range hood
By arranging an openable baffle at the smoke collection port of the range hood, and using the negative pressure generated by the impeller to automatically open the baffle, the problem of the complex structure of the existing range hood is solved, and the structure is simplified and the function is improved.
Patent Information
- Application Number
- CN202420285939.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-06
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-02-06
AI Technical Summary
The existing range hood has a complex structure, and the baffle provided at the inlet requires a complex driving mechanism to open, resulting in a not-simple structure.
An openable baffle is installed at the smoke collection port of the range hood. The negative pressure generated by the rotation of the impeller is used to automatically open the baffle. When the impeller stops rotating, the baffle is closed by gravity to avoid the use of complex driving mechanisms. .
The structure of the range hood is simplified, unnecessary mechanical parts are reduced, and the reliability and service life of the equipment are improved. At the same time, the reverse flow of oil smoke is avoided, and the inside of the casing is kept clean.
Smart Images
Figure CN222378177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art
[0002] A range hood is a device used to extract kitchen fumes. It is mainly composed of a fan, an oil net, a fume hood, etc. The working principle of a range hood is to use the negative pressure of the fan to suck the fumes from the fume hood, filter them through the oil net, and then discharge them to the outside through the flue or exhaust pipe.
[0003] At present, some range hoods on the market have baffles at their smoke inlets (also called air inlets), and the baffles are driven to open by elastic mechanisms or other complex driving mechanisms, which results in a relatively complex structure at this location. Utility Model Content
[0004] In view of this, an embodiment of the utility model provides a range hood, which is convenient for simplifying the structure of the range hood.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] In a first aspect, an embodiment of the utility model provides a range hood, comprising: a casing, the interior of the casing is a cavity structure, the casing comprises at least one smoke inlet panel, the smoke inlet panel is arranged obliquely, and the smoke inlet panel is provided with a smoke collecting port connected to the interior of the casing;
[0007] The smoke collecting port is provided with an openable baffle, and the baffle is located inside the smoke collecting port. A volute is provided inside the housing, and an impeller for sucking oil smoke from the smoke collecting port is provided inside the volute.
[0008] When the impeller rotates, negative pressure is generated between the impeller and the smoke collecting port. Under the action of the negative pressure, the baffle swings from the smoke collecting port toward the inside of the casing to open the smoke collecting port to form a guide port for extracting oil smoke.
[0009] Optionally, after the impeller switches from the first speed to the second speed, the baffle adjusts the guide port from the first opening size to the second opening size under the action of its own weight; wherein the second speed is lower than the first speed, and the second opening is smaller than the first opening.
[0010] Optionally, a hinge seat is provided on the inner wall of the smoke inlet panel, near the top of the smoke collecting port, and a hinge shaft is provided on the baffle. The baffle is hinged to the hinge seat through the hinge shaft, and when the impeller is in a stationary state, the baffle closes the smoke collecting port by its own gravity.
[0011] Optionally, the hinge seat comprises: a first opening hoop and a second opening hoop arranged at intervals in the transverse direction, wherein the first opening hoop and the second opening hoop respectively have openings in the circumferential direction;
[0012] The hinge axis includes a first hinge axis and a second hinge axis arranged on both sides of the top of the baffle; the first hinge axis is inserted into the first opening hoop from the opening of the first opening hoop to form a first hinge, and the second hinge axis is inserted into the second opening hoop from the opening of the second opening hoop to form a second hinge.
[0013] Optionally, the opening directions of the first opening hoop and the second opening hoop are upward;
[0014] A limiting portion is also provided on the inner wall of the smoke inlet panel, between the first opening hoop and the second opening hoop, for preventing the baffle from escaping from the first opening hoop and the second opening hoop when the baffle swings toward the inside of the casing under the action of the negative pressure.
[0015] Optionally, the limiting portion includes: a supporting arm portion and a hook portion located at the free end of the supporting arm portion, one end of the supporting arm portion is fixed to the inner wall of the smoke collecting chamber formed on the inner side of the smoke inlet panel, and the active surface of the hook portion is arranged downward and engaged with the upper edge of the baffle.
[0016] Optionally, the active surface of the hook portion contacts the top end of the baffle, and the supporting arm portion is elastic.
[0017] Optionally, a sunken step surface is provided on the edge of the baffle surface facing the smoke collecting port, and when the baffle is in a closed state covering the smoke collecting port, the middle body of the baffle is embedded in the smoke collecting port, and the step surface abuts against the inner wall of the smoke inlet panel.
[0018] The range hood provided by the embodiment of the utility model is provided with an openable and closable baffle at the smoke collecting port. When the impeller rotates, negative pressure is generated between the impeller and the smoke collecting port. Under the action of the negative pressure, the baffle swings from the smoke collecting port toward the inside of the casing to open the smoke collecting port and form a guide port for sucking oil smoke. In this way, there is no need to separately provide an elastic mechanism or other complex driving mechanism to drive the baffle to open. Furthermore, by arranging the baffle on the inner side of the smoke collecting port, when the impeller stops rotating, the baffle can naturally close the smoke collecting port under the action of its own weight. There is no need to rely on another driving mechanism, thereby simplifying the structure of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 This is a schematic structural diagram of an embodiment of the range hood of the utility model;
[0021] Figure 2 for Figure 1 Middle AA section view;
[0022] Figure 3 for Figure 2 Enlarged view of the local structure at point B in the middle.
[0023] Figure 4 This is a flowchart of the working process of the range hood of the utility model. DETAILED DESCRIPTION
[0024] The following is a detailed description of the embodiments of the utility model in conjunction with the accompanying drawings, in which the same or similar components are represented by the same symbols. If there are any dimensions or ratios in the accompanying drawings, they are only for convenience of description and do not represent the actual dimensions and ratios.
[0025] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Example 1
[0027] See also Figure 1 and Figure 2 , Figure 1 The schematic diagram of the structure of a range hood provided by the embodiment of the utility model comprises: a housing 1, the interior of the housing 1 is a cavity structure, the housing 1 comprises at least one smoke inlet panel 2, the smoke inlet panel 2 is arranged obliquely, and a smoke collecting port 3 connected to the interior of the housing 1 is provided on the smoke inlet panel 2; wherein, when the range hood is installed above or near a stove, the smoke inlet panel 2 is arranged toward the stove in space.
[0028] The smoke collecting port 3 is provided with an openable baffle 4, which is located inside the smoke collecting port 3. A volute (not shown in the figure) is provided inside the casing 1, and an impeller (not shown in the figure) is provided inside the volute for sucking oil smoke from the smoke collecting port 3.
[0029] When the impeller rotates, negative pressure is generated between the impeller and the smoke collecting port 3. Under the action of the negative pressure, the baffle 4 swings from the smoke collecting port 3 toward the inside of the casing to open the smoke collecting port 3 and form a guide port 5 for absorbing oil smoke.
[0030] The range hood and working method provided by the embodiment of the utility model provide an openable and closable baffle at the smoke collecting port. When the impeller rotates, negative pressure is generated between the impeller and the smoke collecting port. Under the action of the negative pressure, the baffle swings from the smoke collecting port toward the inside of the casing to open the smoke collecting port and form a guide port for sucking oil smoke. In this way, there is no need to separately provide an elastic mechanism or other complex driving mechanism to drive the baffle to open. Furthermore, by arranging the baffle on the inner side of the smoke collecting port, when the impeller stops rotating, the baffle can naturally close the smoke collecting port under the action of its own weight. There is no need to rely on another driving mechanism, thereby simplifying the structure of the range hood.
[0031] The range hood provided by the embodiment of the utility model also has the following advantages: since the baffle 4 is located at the inner side of the smoke collecting port 3, when the impeller stops rotating, the baffle 4 can naturally fall back under the action of its own weight to close the smoke collecting port 3, thereby preventing the oil smoke from flowing back from the inside to the outside of the smoke collecting port, and keeping the interior of the casing 1 clean, thereby extending the service life of the range hood.
[0032] In some embodiments, the cavity structure formed by the housing may include: a left air inlet cavity 11 and a right air inlet cavity 12, and baffles 4 are respectively installed inside the smoke collecting ports 3 of the left air inlet cavity 11 and the right air inlet cavity 12, and the baffles 4 are hinged on the inner wall of the cavity, and the angle A between the baffles 4 and the inner wall of the cavity changes with the speed of the fan, forming a guide port 5. The guide port changes with the angle A, that is, the angle A is small when the fan speed is small, and the angle A is large when the fan speed is large; when the fan is running at a low speed, the angle A between the air inlet baffle 4 and the inner wall of the cavity is in a smaller state when the main unit is working, and in each angle state during the change process, the corresponding air inlet wind speed is in the best balance state between energy consumption and smoke exhaust, so it can more effectively absorb oil smoke.
[0033] If the size of the smoke inlet is fixed, it cannot be automatically adjusted according to the fan speed and the size of the oil smoke. This will lead to some problems. For example, when the fan is running at a low speed, the smoke inlet is too large and the oil smoke cannot be sucked in in time, causing oil smoke overflow and backflow; when the fan is running at a high speed, the smoke inlet is too small and the fan exhaust volume cannot be fully utilized, resulting in energy waste.
[0034] In some embodiments, the speed of the impeller is variable, and the speed of the impeller is positively correlated with the opening angle of the baffle 4, that is, the higher the speed of the impeller, the larger the opening angle of the baffle 4, and vice versa. Specifically, after the impeller switches from the first speed to the second speed, the baffle adjusts the guide port from the first opening size to the second opening size under the action of its own weight; wherein the second speed is lower than the first speed, and the second opening is smaller than the first opening.
[0035] The range hood provided by the embodiment of the utility model is provided with an openable baffle plate 4 at the smoke collecting port 3, so that the baffle plate 4 can automatically adjust the size of the guide port 5 according to the rotation speed of the impeller and the size of the oil smoke, thereby realizing the adaptive adjustment of the size of the smoke inlet according to the rotation speed of the impeller. In this way, the suction efficiency of the range hood can be improved, the overflow and backflow of oil smoke can be reduced, and energy consumption can be saved.
[0036] Specifically, by setting an openable baffle at the smoke collection port, the baffle can automatically adjust the size of the guide port according to the rotation speed of the impeller and the size of the oil smoke, forming guide ports of different sizes for absorbing oil smoke at different rotation speeds and maintaining a reasonable air velocity at the suction port, and realizing the size of the smoke inlet adjusted by the rotation speed of the impeller. In this way, the suction efficiency of the range hood can be improved, the overflow and backflow of oil smoke can be reduced, and energy consumption can be saved.
[0037] It is understandable that, generally, when the impeller changes speed, it will affect the size and direction of the airflow. If the impeller changes from high speed to low speed, the speed and pressure of the airflow will also decrease, resulting in a worse effect of absorbing oil smoke.
[0038] In this embodiment, by setting a baffle at the smoke collecting port, the baffle can adjust the size of the guide port according to the wind speed under the action of its own weight. Specifically, when the impeller changes speed from high speed to low speed, the guide port will become smaller, which can reduce the flow area of the airflow and increase the speed and pressure of the airflow, so that it is convenient to quickly inhale the oil smoke at a lower speed and improve the efficiency of oil smoke absorption. At the same time, the smaller the guide port, the energy consumption can be saved.
[0039] Please see Figure 2 and Figure 3 As shown, in some embodiments, a hinge seat 6 is provided on the inner wall of the smoke inlet panel 2, near the upper position of the smoke collecting port 3, and a hinge shaft 7 is provided on the baffle 4. The baffle 4 is hinged in the hinge seat 6 through the hinge shaft 7, and when the impeller is in a stationary state, the baffle 4 closes the smoke collecting port 3 by its own gravity. By providing the hinge seat 6 on the smoke inlet panel 2, the baffle 4 can rotate in the hinge seat 6, so that when the impeller rotates to generate negative pressure, the baffle 4 is adsorbed, thereby realizing the opening of the baffle 4.
[0040] In addition, since the hinged seat 6 is located close to the top of the smoke collecting port 3, the baffle 4 can close the smoke collecting port 3 under the action of its own gravity when the impeller is in a stationary state, without the need for additional springs or other complex mechanisms, thereby further simplifying the structure, reducing costs and improving reliability.
[0041] Specifically, the hinge seat 6 includes: a first opening hoop and a second opening hoop arranged at intervals in the transverse direction, and the first opening hoop and the second opening hoop have openings in the circumferential direction respectively;
[0042] The hinge shaft 7 includes: a first hinge shaft and a second hinge shaft arranged on both sides of the top of the baffle 4; the first hinge shaft is inserted into the first opening hoop from the opening of the first opening hoop to form a first hinge, and the second hinge shaft is inserted into the second opening hoop from the opening of the second opening hoop to form a second hinge.
[0043] In this embodiment, by arranging the first opening hoop and the second opening hoop on the hinge seat 6, the hinge shaft 7 can be inserted into or removed from the openings of the first opening hoop and the second opening hoop, thereby realizing the assembly and disassembly of the baffle 4. In this way, the replacement and maintenance of the baffle 4 can be facilitated, and the convenience of use is improved.
[0044] Specifically, the first opening hoop and the second opening hoop may have a certain elasticity, and the opening diameters of the first opening hoop and the second opening hoop may be slightly smaller than the diameters of the corresponding hinge shafts. This can facilitate the insertion of the hinge shaft to a certain extent and prevent it from falling out, thereby improving its working reliability.
[0045] In an optional embodiment, the opening directions of the first opening hoop and the second opening hoop are upward. A limiting portion is also provided on the inner wall of the smoke inlet panel 2, between the first opening hoop and the second opening hoop, to prevent the baffle 4 from coming out of the first opening hoop and the second opening hoop when the baffle 4 swings toward the inside of the casing 1 under the action of negative pressure. In this way, when the impeller rotates, the baffle 4 is affected by the negative pressure and swings toward the inside of the casing 1. At this time, the hinge shaft 7 is also supported upward, and is not easy to come out of the first opening hoop and the second opening hoop under the obstruction of the limiting portion, thereby ensuring the stability of the swinging of the baffle 4. In addition, by setting the opening directions of the first opening hoop and the second opening hoop upward, it is also convenient to remove the baffle for cleaning.
[0046] Specifically, the limiting portion includes: a supporting arm portion and a hook portion located at the free end of the supporting arm portion, one end of the supporting arm portion is fixed to the inner wall of the smoke collecting chamber formed on the inner side of the smoke inlet panel 2, and the active surface of the hook portion is arranged downward and is engaged with the upper end edge of the baffle 4.
[0047] Specifically, the action surface of the hook portion contacts the top of the baffle 4, and the supporting arm portion is elastic. By arranging the hook portion on the limiting portion, the hook portion contacts the top of the baffle 4, thereby limiting the flipping angle of the baffle 4. In this way, the baffle 4 can be prevented from flipping excessively when the impeller rotates, causing the baffle 4 to fall out of the hinge seat 6, affecting the normal operation of the range hood.
[0048] Furthermore, since the support arm is elastic, when the baffle 4 is affected by the negative pressure when the impeller rotates and swings toward the inside of the casing 1, the support arm can produce a certain elastic deformation after the hook portion contacts the top of the baffle 4, thereby providing a buffering effect, reducing the impact force between the baffle 4 and the hook portion, and extending the service life of the limit portion to a certain extent.
[0049] See again Figure 3 In some embodiments, a sunken step surface 41 is provided on the edge of the surface of the baffle plate 4 facing the smoke collecting port 3. When the baffle plate 4 is in a closed state covering the smoke collecting port 3, the middle body of the baffle plate 4 is embedded in the smoke collecting port 3, and the step surface 41 abuts against the inner wall of the smoke inlet panel 2. By providing the step surface 41 on the baffle plate 4, the baffle plate 4 can be more closely matched with the smoke collecting port 3 and the smoke inlet panel 2, thereby achieving a sealing effect on the smoke collecting port 3, thereby preventing the oil smoke from flowing back from the smoke collecting port 3, keeping the interior of the housing 1 clean, and extending the service life of the range hood.
[0050] In addition, due to the setting of the step surface 41, the overall thickness of the baffle 4 can be partially reduced, thereby reducing the weight of the baffle 4 and reducing the force required for the impeller to adsorb the baffle inward, thereby saving the operating energy consumption of the range hood.
[0051] To help understand the technical solutions and technical effects provided by the embodiments of the present invention, the following Figure 4 The working principle is described as follows: Figure 4 Based on the range hood provided in the first embodiment, the working method of the range hood provided in the embodiment of the utility model comprises the following steps:
[0052] Step S210, receiving a host start command, the host enters the working stage, and the impeller rotates;
[0053] Step S220: When the impeller rotates, negative pressure is generated between the impeller and the smoke collecting port;
[0054] Step S230: Under the action of negative pressure, the baffle swings from the smoke collecting port toward the inside of the casing, opening the smoke collecting port to form a guide port for extracting oil smoke, and the oil smoke is sucked into the casing through the guide port.
[0055] The working method of the range hood provided by the embodiment of the utility model utilizes the negative pressure effect generated by the rotation of the impeller, so that the baffle can be opened and the size of the smoke inlet can be adjusted adaptively according to the speed of the impeller, thereby improving the effect of extracting smoke and saving energy.
[0056] In some embodiments, the method further comprises:
[0057] After the impeller switches from the first speed to the second speed, the baffle adjusts the guide port from the first opening size to the second opening size under the action of its own weight; wherein the second speed is lower than the first speed, and the second opening is smaller than the first opening.
[0058] Specifically, the baffle adaptively adjusts the opening angle with the different rotation speeds of the impeller, forming guide ports of different sizes for absorbing oil smoke at different rotation speeds and maintaining a reasonable suction wind speed. After the impeller switches from the first speed to the second speed, when the fan is running at a low speed, the guide port formed by adsorption and opening is small, and the air flow area at the guide port is reduced, resulting in an increase in the air flow velocity and pressure. The oil smoke flow velocity at the guide port is increased and is quickly sucked into the casing, thereby improving the oil smoke suction efficiency and saving energy.
[0059] Furthermore, when the guide port formed by being sucked open is small, the method may further include: the oil smoke gathered at the smoke collecting port hits the wind shield and flows downward along the wind shield into the guide port.
[0060] In some other embodiments, the following steps are also included:
[0061] When the baffle plate swings from the smoke collecting port toward the inside of the casing under the action of the negative pressure, the method further comprises: using a limiting portion to provide a support point for the baffle plate to rotate around a hinge axis at the top, and limiting the flipping angle of the baffle plate during the swinging from the smoke collecting port toward the inside of the casing.
[0062] Specifically, the method further includes: after the main engine is turned off and the impeller is in a stationary state, the baffle closes the smoke collecting port by its own gravity under the action of its own weight.
[0063] The working method of the range hood provided by the embodiment of the utility model does not require a spring mechanism or other complex structures. By utilizing the deadweight of the baffle, the baffle can naturally close the smoke collecting port when the impeller stops rotating, thereby preventing oil smoke from flowing back from the smoke collecting port, keeping the interior of the casing clean, and extending the service life of the range hood.
[0064] It should be noted that, in this article, the terms "upper", "lower" and the like indicating the position or position relationship are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. Relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the phrase "comprising a ..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements. For ordinary technicians in this field, it can be understood by specific circumstances.
[0065] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A range hood, characterized in that: include: A casing, wherein the interior of the casing is a hollow structure, and the casing comprises at least one smoke inlet panel, the smoke inlet panel is arranged obliquely, and a smoke collecting port communicating with the interior of the casing is opened on the smoke inlet panel; The smoke collecting port is provided with an openable baffle, and the baffle is located inside the smoke collecting port. A volute is provided inside the housing, and an impeller for sucking oil smoke from the smoke collecting port is provided inside the volute. When the impeller rotates, negative pressure is generated between the impeller and the smoke collecting port. Under the action of the negative pressure, the baffle swings from the smoke collecting port toward the inside of the casing to open the smoke collecting port to form a guide port for extracting oil smoke.
2. The range hood according to claim 1, characterized in that: After the impeller switches from the first speed to the second speed, the baffle adjusts the guide port from the first opening size to the second opening size under the action of its own weight; wherein the second speed is lower than the first speed, and the second opening is smaller than the first opening.
3. The range hood according to claim 1, characterized in that: A hinge seat is provided on the inner wall of the smoke inlet panel, near the upper part of the smoke collecting port, and a hinge shaft is provided on the baffle. The baffle is hinged in the hinge seat through the hinge shaft, and when the impeller is in a stationary state, the baffle closes the smoke collecting port by its own gravity.
4. The range hood according to claim 3, characterized in that: The hinge seat comprises: a first opening hoop and a second opening hoop arranged at intervals in the transverse direction, wherein the first opening hoop and the second opening hoop respectively have openings in the circumferential direction; The hinge axis includes a first hinge axis and a second hinge axis arranged on both sides of the top of the baffle; the first hinge axis is inserted into the first opening hoop from the opening of the first opening hoop to form a first hinge, and the second hinge axis is inserted into the second opening hoop from the opening of the second opening hoop to form a second hinge.
5. The range hood according to claim 4, characterized in that: The opening directions of the first opening hoop and the second opening hoop are upward; A limiting portion is also provided on the inner wall of the smoke inlet panel, between the first opening hoop and the second opening hoop, for preventing the baffle from escaping from the first opening hoop and the second opening hoop when the baffle swings toward the inside of the casing under the action of the negative pressure.
6. The range hood according to claim 5, characterized in that: The limiting portion includes: a supporting arm portion and a hook portion located at the free end of the supporting arm portion, one end of the supporting arm portion is fixed to the inner wall of the smoke collecting chamber formed on the inner side of the smoke inlet panel, and the active surface of the hook portion is arranged downward and engaged with the upper end edge of the baffle.
7. The range hood according to claim 6, characterized in that: The action surface of the hook portion contacts the top end of the baffle, and the support arm portion is elastic.
8. The range hood according to claim 1, characterized in that: The edge of the baffle plate facing the smoke collecting port is provided with a sunken step surface. When the baffle plate is in a closed state covering the smoke collecting port, the middle body of the baffle plate is embedded in the smoke collecting port, and the step surface abuts against the inner wall of the smoke inlet panel.