Air cabinet front cover plate, air cabinet and range hood

Abstract

The utility model discloses an air cabinet front cover plate, an air cabinet and a range hood, and relates to the technical field of structural optimization design of range hoods, and the technical scheme provided by the embodiment of the utility model at least has the following beneficial effects that the radius of an arc capable of being enveloped of a lower half hole of an impeller passing hole is larger than that of an arc capable of being enveloped of an upper half hole of the impeller passing hole. By the adoption of the extractor hood, the condition that the impeller of the extractor hood can be smoothly detached is met, and meanwhile the box body of the extractor hood is lighter and thinner.

Description

Technical Field

[0001] The utility model relates to the technical field of optimizing the structure design of a range hood, in particular to a front cover plate of a wind cabinet, a wind cabinet and a range hood. Background Art

[0002] Currently, the mainstream range hood is a range hood with a centrally located wind cabinet, that is, a part of the wind cabinet is located inside the cabinet body and another part is located inside the smoke collecting hood. With the increasing requirements of users for the utilization rate of indoor space and the appearance of the range hood, each manufacturer continuously optimizes the depth dimension of the range hood cabinet body to make the cabinet body of the range hood thinner and thinner.

[0003] However, the thinner the cabinet body is, the more difficult it is to disassemble and maintain the impeller of the range hood. Therefore, how to optimize the structure of the wind cabinet to make the disassembly and maintenance of the impeller more smooth has become an issue of concern in the industry. Summary of the Utility Model

[0004] Based on this, in view of the above technical problems, it is necessary to provide a front cover plate of a wind cabinet, a wind cabinet and a range hood.

[0005] In a first aspect, a front cover plate of a wind cabinet is provided. An impeller through hole is provided on the front cover plate of the wind cabinet, and the arc radius that can envelope the lower half hole of the impeller through hole is greater than the arc radius that can envelope the upper half hole.

[0006] As an optional implementation manner, the lower half hole of the impeller through hole is connected to the upper half hole through a transition part.

[0007] As an optional implementation manner, the central angle that can envelope the upper half hole is greater than or equal to a preset first angle, the central angle that can envelope the lower half hole is greater than or equal to a preset second angle, and the first angle is less than or equal to the second angle.

[0008] As an optional implementation manner, the horizontal dimension of the impeller through hole is greater than a preset impeller diameter;

[0009] The vertical dimension of the impeller through hole is greater than the impeller diameter.

[0010] As an optional implementation manner, the distance between the edge of the impeller through hole and the edge of the front cover plate of the wind cabinet is greater than or equal to a preset machining allowance distance.

[0011] As an optional implementation manner, the impeller through hole is one or a combination of a polygon, an elliptical arc, a parabola, and a spline curve.

[0012] In a second aspect, a wind cabinet is provided, including a rear cover plate of the wind cabinet, a wind cabinet enclosing plate, and the front cover plate of the wind cabinet as described in the first aspect; wherein,

[0013] The rear cover plate of the air duct is connected to the side wall of the air duct, and the side wall of the air duct is connected to the front cover plate of the air duct;

[0014] The rear cover plate of the air duct, the side wall of the air duct and the front cover plate of the air duct enclose a cavity for accommodating the impeller and motor of the range hood.

[0015] In a third aspect, a range hood is provided, which applies the air duct described in the second aspect.

[0016] The present application provides a front cover plate of an air duct, an air duct and a range hood. The technical solution provided by the embodiments of the present application has at least the following beneficial effects: The arc radius that can envelope the lower half hole of the hole through which the impeller passes is greater than the arc radius that can envelope the upper half hole. The impeller through hole on the traditional front cover plate of the air duct is designed as a standard circle. Based on the preset mathematical model S = w cos[arccos(D / L)-θ] - {H - wsin[arccos(D / L)-θ]}tan[arccos(D / L)-θ] + b, it can be known that according to the impeller width w, impeller diameter D, front cover outlet length L, air duct installation angle θ, outlet height H of the smoke collecting hood and the depth b of the lower part of the air duct input by the user, the minimum theoretical size S of the box depth is output. In order to further reduce the minimum theoretical size S of the box depth, the front cover outlet length L can be increased, that is, the vertical dimension of the impeller through hole. Considering the processing difficulty of the front cover plate of the air duct and the strength of the air duct, the opening size of the upper half hole can be maintained and the opening size of the lower half hole can be enlarged, that is, the arc radius that can envelope the lower half hole of the impeller through hole is greater than the arc radius that can envelope the upper half hole, then L increases, and the minimum theoretical size S of the box depth can be further reduced. While ensuring that the impeller of the range hood can be removed smoothly, the range hood box can be made thinner and lighter. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the front cover plate of the air duct provided by the embodiment of the present application.

[0018] Figure 2 It is a schematic structural diagram of a simplified model of the range hood box provided by the embodiment of the present application.

[0019] Figure 3 It is a schematic diagram of the disassembly and assembly method of an impeller provided by the embodiment of the present application.

[0020] Figure 4 It is a schematic structural diagram of an air duct provided by the embodiment of the present application. Detailed Embodiments

[0021] In order to make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] Next, in conjunction with the specific implementation manners, a front cover plate of a blower cabinet, a blower cabinet, and a range hood provided by an embodiment of the present application will be described.

[0023] In a first aspect, a front cover plate of a blower cabinet is provided. Figure 1 As shown in the structural schematic diagram of the front cover plate of the blower cabinet provided by an embodiment of the present application, as Figure 1 shown, an impeller through hole is provided on the front cover plate of the blower cabinet, and the arc radius that can envelope the lower half hole of the impeller through hole is greater than the arc radius that can envelope the upper half hole.

[0024] In implementation, on the front cover plate of the blower cabinet with a traditional structure, the impeller through hole M is a standard circular structure, that is, the radius L 1 of the upper half hole is equal to the radius L 2 of the lower half hole. Figure 2 As shown in the structural schematic diagram of a simplified model of a range hood box body provided by an embodiment of the present application, as Figure 2 shown, the blower cabinet C is arranged inside the range hood box body V, and the impeller U is sleeved on the mounting shaft of the motor M and is inside the blower cabinet C. Figure 3 As shown in the schematic diagram of a disassembly and assembly method of an impeller provided by an embodiment of the present application, as Figure 3 shown, when disassembling the impeller U, considering that the gap between the impeller U and the blower cabinet C is small when they are in the installed state, the impeller U cannot complete radial rotation inside the blower cabinet C and must be separated from the blower cabinet C by a certain distance, and the lower rear endpoint of the impeller U coincides with the bottom end of the outlet of the front cover of the blower cabinet (such as point A), and the upper edge of the impeller U is aligned with the top end of the outlet of the front cover of the blower cabinet (such as point B), and the front side of the impeller U is aligned with the top end of the outlet of the smoke collecting hood Y (such as point R), the user can take out the impeller U from the outlet of the front cover of the blower cabinet (such as Figure 3 the arrow direction in), indicating that the depth of the range hood box body at this time meets the minimum size for the impeller U to be disassembled. According to the installation angle θ of the blower cabinet, the depth b of the lower part of the blower cabinet, the length L of the outlet of the front cover, the width w of the impeller, the diameter D of the impeller, and the outlet height H of the smoke collecting hood, the minimum theoretical size S of the box body depth is determined.

[0025] S = w cos[arccos(D / L) - θ] - {H - w sin[arccos(D / L) - θ]} tan[arccos(D / L) - θ] + b; where S is the minimum theoretical size of the box depth, w is the impeller width, D is the impeller diameter, L is the length of the front cover outlet, θ is the air cabinet installation angle, H is the outlet height of the smoke hood, and b is the depth of the lower part of the air cabinet. Based on the above mathematical model, the larger the length of the front cover outlet, that is, the vertical dimension of the impeller through-hole, the smaller the minimum theoretical size of the box depth. Therefore, the impeller through-hole can be enlarged. However, enlarging the overall size of the impeller through-hole will result in too small a distance K between the edge of the impeller through-hole and the edge of the front cover of the air cabinet, thus causing problems such as difficult processing and low strength of the air cabinet. Therefore, the opening size L of the upper half-hole can be maintained 1 , and the opening size L of the lower half-hole can be enlarged 2 , and at the same time, it can be ensured that the distance K between the edge of the impeller through-hole and the edge of the front cover of the air cabinet is greater than or equal to the preset machining allowance distance.

[0026] In the actual production process, the impeller through-hole is not necessarily a standard circle or a combination of semi-circles with different radii, and can also be a polygon, an elliptical arc, a parabola, and a spline curve, or a combination of one or more of them, as long as the radius of the arc that can envelope the lower half-hole is greater than the radius of the arc that can envelope the upper half-hole.

[0027] As an alternative implementation, the lower half-hole and the upper half-hole of the impeller through-hole are connected by a transition part.

[0028] As shown in Figure 1 , the transition part T is a combined design of an arc and a fillet, which is used to smooth the part between the upper half-hole and the lower half-hole. The transition part can be a symmetric design, and the central angle corresponding to one side is α. In this embodiment, α can be 8°.

[0029] As an alternative implementation, the central angle of the arc that can envelope the upper half-hole is greater than or equal to a preset first angle, and the central angle of the arc that can envelope the lower half-hole is greater than or equal to a preset second angle, and the first angle is less than or equal to the second angle.

[0030] Preferably, the central angle of the concave part of the upper half-hole that can envelope is ≥140° and the upper half-hole can be an arc with a radius of R 1 , the central angle of the concave part of the lower half-hole that can envelope is ≥140° and the lower half-hole can be an arc with a radius of R 2 , R 1 can be 145 mm, and R 2 can be 149.5 mm.

[0031] As an alternative implementation, the horizontal dimension of the impeller through-hole is greater than the preset impeller diameter;

[0032] The vertical dimension of the impeller through the hole is greater than the impeller diameter.

[0033] In a second aspect, there is provided an air handling unit, as Figure 4 shown, including an air handling unit rear cover plate B 1 , an air handling unit side wall B 2 and an air handling unit front cover plate B as in the first aspect 3 ; wherein,

[0034] the air handling unit rear cover plate B 1 is connected to the air handling unit side wall B 2 , and the air handling unit side wall B 2 is connected to the air handling unit front cover plate B 3 ;

[0035] the air handling unit rear cover plate B 1 , the air handling unit side wall B 2 and the air handling unit front cover plate B 3 enclose to form a cavity for accommodating the impeller of the range hood and the range hood motor.

[0036] In a third aspect, there is provided a range hood applying the air handling unit of the second aspect.

[0037] It should be noted that in this text, 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 any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0038] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0039] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

[0040] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0041] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A wind cabinet front cover plate, wherein an impeller through hole is provided on the wind cabinet front cover plate, characterized in that: The arc radius that can be enclosed by the lower half of the impeller through hole is greater than the arc radius that can be enclosed by the upper half of the impeller through hole.

2. The front cover of the wind cabinet according to claim 1 is characterized in that: The lower half hole of the impeller hole is connected with the upper half hole through a transition part.

3. The front cover of the wind cabinet according to claim 1, characterized in that: The envelopable central angle of the upper half hole is greater than or equal to a preset first angle, the envelopable central angle of the lower half hole is greater than or equal to a preset second angle, and the first angle is less than or equal to the second angle.

4. The front cover of the wind cabinet according to claim 1 is characterized in that: The horizontal dimension of the impeller through hole is larger than the preset impeller diameter; The vertical dimension of the impeller through hole is larger than the impeller diameter.

5. The front cover of the wind cabinet according to claim 1 is characterized in that: The distance between the edge of the impeller through hole and the edge of the wind cabinet front cover plate is greater than or equal to a preset processing allowance distance.

6. The front cover of the wind cabinet according to claim 1, characterized in that: The impeller through hole is one or more combinations of a polygon, an elliptical arc, a parabola and a spline.

7. A wind cabinet, characterized in that: It comprises a wind cabinet rear cover plate, a wind cabinet enclosure plate and a wind cabinet front cover plate as claimed in any one of claims 1 to 4; wherein, The wind cabinet rear cover is connected to the wind cabinet enclosure, and the wind cabinet enclosure is connected to the wind cabinet front cover; The wind cabinet rear cover plate, the wind cabinet enclosure plate and the wind cabinet front cover plate are enclosed to form a cavity, and the cavity is used to accommodate the range hood impeller and the range hood motor.

8. A range hood, characterized in that: The wind cabinet according to claim 7 is used.

Images