External fire cover and burner

Abstract

The embodiment of the present invention discloses an external fire cover and a burner, which relates to the technical field of gas stoves. The external fire cover includes an annular main body, the annular main body is provided with a fire transmission channel that runs through the inner and outer sides of the annular main body, and the annular main body is provided with a gas channel; the fire transmission channel includes an inner section and an outer section arranged in sequence from the inside to the outside, the diameter of the outer section is larger than the diameter of the inner section; the inner wall of the fire transmission channel is provided with a plurality of fire transmission holes connected to the gas channel in sequence from the inside to the outside, and the height of the upper end surface of the fire transmission hole is higher than the bottom of the fire transmission channel. On the one hand, the diameter of the inner section is smaller than the diameter of the outer section, and the stepped hole design can achieve precise control of the gas flow rate, ensure stable flame transmission, and improve the success rate of ignition; on the other hand, the small diameter of the inner section can effectively limit the entry of overflow, and the high-position arrangement of the fire transmission hole can effectively prevent overflow from entering the fire transmission hole, effectively preventing the fire transmission hole from being blocked.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stoves, and in particular to an outer fire cover and a burner. Background Art

[0002] In the field of gas stove burners, the design of the fire transmission channel of the outer fire cover directly affects the combustion stability and anti-clogging performance. Traditional outer fire covers generally adopt a top open gap fire transmission scheme, and a narrow through-type gap is opened at the top of the outer fire cover through machining to serve as a fire transmission channel. Although this type of structure can achieve continuous ignition of the outer ring fire hole, it exposes significant defects in actual use: because the fire transmission gap is completely exposed to the surface of the burner, liquid substances such as soup and grease that overflow during cooking can easily penetrate into the channel along the edge of the gap, forming a viscous residue accumulation. Over time, such pollutants will gradually block the fire transmission path, resulting in problems such as ignition delay and flame transmission interruption. In severe cases, it can even cause the burner to fail completely.

[0003] In order to solve the problem of easy clogging of the above-mentioned fire transmission channels, the industry has begun to explore the design of hidden fire transmission channels. For example, the outer ring fire cover of the gas burner disclosed in patent CN208170385U sets an annular fire transmission groove inside the fire cover, and changes the traditional narrow and long gap into a circular hole structure with a larger diameter, so that the fire transmission path is transformed from open on the surface to closed inside. Similarly, patent CN210861101U proposes to set a sunken fire transmission hole at the bottom of the fire cover, trying to reduce the probability of overflow contact by changing the spatial layout of the fire transmission channel. Although these improvement schemes have improved the anti-clogging ability to a certain extent, after long-term verification, the following technical contradictions still exist: although the increased fire transmission diameter can delay the initial clogging process, the excessively large opening size provides a smoother entry channel for solid foreign matter such as debris and food residues. As the use time accumulates, the amount of foreign matter deposited in the channel will show a nonlinear growth.

[0004] These technical contradictions expose a core flaw in current flame transmission channels: geometric optimization and improved anti-blocking performance have failed to achieve a synergistic effect. The key challenge in developing a three-dimensional protection system with robust anti-blocking capabilities while ensuring flame transmission efficiency has become a key constraint on the development of gas stove cover technology. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is how to improve the anti-blocking performance under the premise of ensuring the flame transmission efficiency.

[0006] In order to solve the above problems, in the first aspect, an embodiment of the present invention proposes an external fire cover, which includes an annular main body, and the annular main body is provided with a fire transfer channel running through the inner and outer sides of the annular main body, and the annular main body is provided with a gas channel; the fire transfer channel includes an inner section and an outer section arranged in sequence from the inside to the outside, and the diameter of the outer section is larger than the diameter of the inner section; the inner wall of the fire transfer channel is provided with a plurality of fire transfer holes connected to the gas channel in sequence from the inside to the outside, and the height of the upper end surface of the fire transfer hole is higher than the bottom of the fire transfer channel.

[0007] A further technical solution is that the height difference between the upper end surface of the fire transfer hole and the bottom of the fire transfer channel is greater than 1 mm.

[0008] A further technical solution is that the diameter of the inner section is greater than 3 mm.

[0009] A further technical solution is that there is a smooth transition between the inner section and the outer section.

[0010] A further technical solution is that a plurality of main fire holes are provided on the outer side of the annular body, and the main fire holes are communicated with the gas channel.

[0011] Its further technical solution is that a flame stabilizing groove is provided on the outer side of the annular body, the flame stabilizing groove is connected to the main fire hole, the flame stabilizing groove is located on the lower side of the main fire hole, and a lower flame stabilizing hole is provided on the lower side of the flame stabilizing groove, and the lower flame stabilizing hole is connected to the gas channel.

[0012] A further technical solution is that a buffer groove connected to the flame stabilizing groove is provided at the opening of the outer section, and the width of the buffer groove is greater than that of the flame stabilizing groove.

[0013] A further technical solution is that an upper flame stabilization hole is provided on the outer side of the annular body, the upper flame stabilization hole is located on the outer side of the main fire hole, and the upper flame stabilization hole is connected to the gas channel.

[0014] A further technical solution is that there are multiple upper flame-stabilizing holes, which are evenly distributed on the outside of the annular body; there are multiple lower flame-stabilizing holes, which are evenly distributed on the lower side of the flame-stabilizing groove.

[0015] In a second aspect, an embodiment of the present invention provides a burner, comprising the outer fire cover as described in the first aspect.

[0016] Compared with the prior art, the embodiments of the present invention can achieve the following technical effects:

[0017] An embodiment of the present invention provides an external fire cover, comprising an annular body, the annular body being provided with a fire transfer channel extending through the inner and outer sides of the annular body, the annular body being provided with a gas channel; the fire transfer channel comprising an inner section and an outer section, arranged sequentially from the inside to the outside, the outer section having a larger diameter than the inner section; the inner wall of the fire transfer channel being provided with a plurality of fire transfer holes, connected to the gas channel, the upper end surfaces of the fire transfer holes being higher than the bottom of the fire transfer channel. On the one hand, the inner and outer sections of the fire transfer channel have different diameters, with the inner section having a smaller diameter than the outer section. The stepped hole design allows for precise control of the gas flow rate, ensuring stable flame transfer and improving the success rate of ignition. On the other hand, the smaller diameter of the inner section effectively limits the ingress of liquid overflow, while the high-positioned arrangement of the fire transfer holes effectively prevents liquid overflow from entering the fire transfer holes, allowing the liquid overflow to flow along the bottom of the fire transfer hole, thereby effectively preventing clogging of the fire transfer holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0021] Figure 1 A schematic structural diagram of an external fire cover proposed in an embodiment of the present invention;

[0022] Figure 2 Another structural schematic diagram of an external fire cover proposed in an embodiment of the present invention;

[0023] Figure 3 A schematic structural diagram of the back side of an external fire cover proposed in an embodiment of the present invention;

[0024] Figure 4 A cross-sectional view of an outer fire cover according to an embodiment of the present invention;

[0025] Figure 5 Another cross-sectional view of an outer fire cover proposed in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of disassembling the outer fire cover from the fire distributor according to an embodiment of the present invention.

[0027] Reference numerals

[0028] Fire distributor 100, gas distribution groove 110, inner fire cover 200, annular main body 10, fire transfer channel 20, gas channel 30, inner section 21, outer section 22, main fire hole 40, flame stabilizing groove 50, lower flame stabilizing hole 60, buffer groove 70, upper flame stabilizing hole 80, inner fire transfer hole 91, middle fire transfer hole 92 and outer fire transfer hole 93. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Similar component numbers in the drawings represent similar components. Obviously, the embodiments described below are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0031] It should also be understood that the terms used in this description of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the description of the embodiments of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] See also Figures 1-6 In an embodiment of the present invention, an external fire cover is provided, which can effectively prevent the flame transmission hole from being blocked while ensuring stable flame transmission. In order to achieve the above technical effects, the external fire cover includes an annular body 10, and the specific structure is described as follows:

[0033] The annular body 10 is in the shape of a ring, and the annular hole in the center is used to place the inner fire cover 200.

[0034] The annular body 10 is provided with a fire transmission channel 20 running through the inner and outer sides of the annular body 10, and a gas channel 30. The fire transmission channel 20 is used to transmit the fire on the inner fire cover 200. The gas channel 30 is used to pass gas, which can be distributed by the fire distributor 100.

[0035] In the present invention, the fire transfer channel 20 includes an inner section 21 and an outer section 22 arranged in sequence from inside to outside. The diameter of the outer section 22 is larger than that of the inner section 21, that is, a stepped arrangement is formed between the inner section 21 and the outer section 22.

[0036] The diameter D1 of the inner section 21 is relatively small (3 mm < D1 < D2), which can effectively limit the entry of overflow liquid. The length of the inner section 21 is L1 (L1 < L, where L is the total length of the fire transfer channel 20); the diameter D2 of the outer section 22 is relatively large (D2 > D1), ensuring air circulation and flame stability. At the same time, through experimental verification by the inventor, when the diameter D1 of the inner section 21 is greater than 3 mm, the flame on the inner fire cap 200 can reliably enter the inner section 21, thus ensuring reliable ignition.

[0037] Specifically, the diameters of the inner section 21 and the outer section 22 are different, and the coordinated control of gas flow velocity and pressure is achieved through the principle of fluid mechanics. Since the diameter of the inner section 21 is relatively small, when the gas flows from the outer section 22 into the inner section 21, the frictional resistance loss along the way increases, the total pressure drops, part of the gas kinetic energy is converted into heat energy, and the gas flow velocity decreases significantly. Therefore, the gas is more easily ignited by the inner ring flame; further, when the flame enters the outer section 22 from the inner section 21, the flow velocity decreases due to the enlarged cross-sectional area, and the static pressure recovery effect forms a stable low-pressure area, anchoring the flame at the outlet of the outer section of the fire transfer hole, avoiding flame lift-off, increasing the stable combustion range, and improving the user experience.

[0038] Further, a plurality of fire transfer holes communicating with the gas channel 30 are sequentially provided on the inner wall of the fire transfer channel 20 from inside to outside. The height of the upper end surface of the fire transfer hole is higher than the bottom of the fire transfer channel 20. The fire transfer hole is used to introduce gas into the fire transfer channel 20.

[0039] See Figure 2 and in combination with Figure 6 , the connection mode between the fire transfer hole and the gas channel 30 is described as follows: The gas channel 30 can specifically be a groove on the lower side of the annular main body 10. An air distribution groove 110 is provided on the upper side of the divider 100. The lower side of the outer fire cap is hermetically covered on the air distribution groove 110 of the divider 100. The fire transfer channel 20 is spatially connected to the air distribution groove 110. At the same time, the air distribution groove 110 is located below the fire transfer hole, and the air distribution groove 110 is connected to the fire transfer hole. Therefore, the fire transfer hole can be connected to the gas channel 30 through the air distribution groove 110. The divider outputs gas into the air distribution groove 110, enabling the gas to enter the gas channel 30.

[0040] Specifically, the inner wall of the fire transmission channel 20 is provided with a plurality of fire transmission holes, the upper end surfaces of which are higher than the bottom of the fire transmission channel 20. When liquid enters the fire transmission channel 20, the overflow is ensured to flow out of the outer ring along the bottom of the fire transmission channel 20 under the action of gravity, preventing the overflow from contacting the fire transmission holes. The fire transmission holes are directly covered and blocked, effectively reducing the probability of fire transmission holes being blocked.

[0041] The plurality of flame transfer holes includes inner flame transfer holes 91, intermediate flame transfer holes 92, and outer flame transfer holes 93, arranged from the inside to the outside. The inner flame transfer holes 91 are numerous and have an inclination angle a1 between 0° and 90°. The mixed gas flows from the gas passage 30 into the inner flame transfer holes 91 and, at the outlet, comes into contact with the combustion flame of the inner fire cover 200, igniting the flame of the inner fire cover 200 to the inner section 21.

[0042] The outlet of the middle fire transfer hole 92 is located in the inner section 21 or the outer section 22 . There are several of them, and the inclination angle a2 is between 0° and 180°. Its function is to ignite the flame of the inner section 21 to the middle of the fire transfer channel 20 .

[0043] The outlets of the external fire holes 93 are in the outer section 22, there are several of them, and the inclination angle a3 is between 0°-90°. Their function is to ignite the flame in the middle of the fire channel 20 to the outside of the fire channel 20, thereby igniting all the fire holes of the external fire cover.

[0044] It should be noted that the inclination angle of the fire transfer hole refers to the angle between the axis of the fire transfer hole and the axis of the fire transfer channel 20. Typically, the inner fire transfer hole 91 is inclined toward the inside of the fire transfer channel 20, the outer fire transfer hole 93 is inclined toward the outside of the fire transfer channel 20, and the middle fire transfer hole 92 can be inclined toward the inside or the outside of the fire transfer channel 20.

[0045] An embodiment of the present invention provides an external fire cover, which includes an annular main body 10, wherein the annular main body 10 is provided with a fire transfer channel 20 running through the inner and outer sides of the annular main body 10, and the annular main body 10 is provided with a gas channel 30; the fire transfer channel 20 includes an inner section 21 and an outer section 22 arranged in sequence from the inside to the outside, and the diameter of the outer section 22 is larger than the diameter of the inner section 21; the inner wall of the fire transfer channel 20 is provided with a plurality of fire transfer holes connected to the gas channel 30 in sequence from the inside to the outside, and the height of the upper end surface of the fire transfer hole is higher than the bottom of the fire transfer channel 20. On the one hand, the diameters of the inner section 21 and the outer section 22 of the fire transfer channel 20 are different. The diameter of the inner section 21 is smaller than that of the outer section 22. Through the stepped hole design, the gas flow rate can be accurately controlled, ensuring stable flame transfer and improving the ignition success rate. On the other hand, the small-diameter inner section 21 can effectively limit the entry of overflow liquid. At the same time, the high-position arrangement of the fire transfer hole can effectively prevent overflow liquid from entering the fire transfer hole, so that the overflow liquid can flow along the bottom of the fire transfer channel 20, thereby effectively preventing the fire transfer hole from being blocked.

[0046] Furthermore, in some embodiments, such as the present embodiment, a height difference H between the upper end surface of the fire transfer hole and the bottom of the fire transfer channel 20 is greater than 1 mm.

[0047] For example, the height difference H between the upper end surface of the fire transfer hole and the bottom of the fire transfer channel 20 is 2 mm, 3 mm, or 4 mm, which is not specifically limited in the present invention. The upper end surface of the fire transfer hole can be specifically opened in the upper half of the fire transfer channel 20 to effectively avoid being blocked by overflowing liquid.

[0048] Experimental verification has shown that when the overflow liquid flows through the bottom of the fire transfer channel 20, its liquid level is usually less than 1 mm. Therefore, when the height difference H between the upper end surface of the fire transfer hole and the bottom of the fire transfer channel 20 is greater than 1 mm, most of the overflow liquid can be prevented from entering the fire transfer hole, thereby effectively preventing the fire transfer hole from being blocked.

[0049] Furthermore, in some embodiments, such as the present embodiment, the diameter of the inner section 21 is greater than 3 mm and smaller than the diameter of the outer section 22. For example, the diameter of the inner section 21 may be 3.5 mm, which is not specifically limited in the present invention. The diameter of the inner section 21 being greater than 3 mm enables stable flame transmission.

[0050] Furthermore, in some embodiments, such as the present embodiment, the inner section 21 and the outer section 22 may have a smooth transition, thereby effectively reducing fluid resistance. For example, the inner section 21 and the outer section 22 may have a tapered or arcuate transition.

[0051] Furthermore, in some embodiments, such as this embodiment, a plurality of main fire holes 40 are provided on the outer side of the annular body 10, and the main fire holes 40 are connected to the gas channel 30. The main fire holes 40 are used to output gas.

[0052] Furthermore, a flame stabilization groove 50 is provided on the outer side of the annular body 10. The flame stabilization groove 50 is connected to the main flame hole 40 (for example, a communication channel is provided between the flame stabilization groove 50 and the main flame hole 40). The flame stabilization groove 50 is located below the main flame hole 40. A lower flame stabilization hole 60 is provided below the flame stabilization groove 50. The lower flame stabilization hole 60 is connected to the gas channel 30. The function of the flame stabilization groove 50 is to form a stable flame source below the main flame hole 40, thereby reliably igniting the gas exiting the main flame hole 40.

[0053] Furthermore, a buffer groove 70 communicating with the flame stabilizing groove 50 is provided at the opening of the outer section 22 , and the width of the buffer groove 70 is greater than that of the flame stabilizing groove 50 .

[0054] Specifically, a buffer groove 70 is provided at the outlet of the outer section 22, and its shape is arc-shaped, square-shaped or other shapes. The buffer groove 70 is connected to the flame stabilizing groove 50. When the burning flame passes through the buffer groove 70, the cross-sectional area is expanded, the flame propagation speed slows down, and it is not easy to separate the flame. At the same time, the buffer groove 70 also connects the outlet of the outer section 22 with several lower flame stabilizing holes 60 next to it, so that the flame in the fire transfer structure can be more easily transferred to the lower flame stabilizing hole 60, thereby improving the ignition success rate.

[0055] Furthermore, an upper flame stabilization hole 80 is provided on the outer side of the annular body 10. The upper flame stabilization hole 80 is located outside the main flame hole 40 and communicates with the gas passage 30. The diameters of the upper flame stabilization hole 80 and the lower flame stabilization hole 60 are both smaller than the diameter of the main flame hole 40. The upper flame stabilization hole 80 functions to form a stable flame source beside the main flame hole 40, thereby reliably igniting the gas exiting the main flame hole 40.

[0056] Furthermore, there are multiple upper flame stabilization holes 80 , which are evenly distributed on the outside of the annular body 10 ; there are multiple lower flame stabilization holes 60 , which are evenly distributed on the lower side of the flame stabilization groove 50 .

[0057] By evenly arranging a plurality of upper flame stabilization holes 80 and a plurality of lower flame stabilization holes 60 , the reliability of igniting the gas coming out of the main flame hole 40 can be greatly improved.

[0058] An embodiment of the present invention provides a burner, comprising the outer fire cover as provided in any of the above embodiments.

[0059] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0062] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and 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.

[0063] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0065] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

[0066] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. An external fire cover, characterized in that: The fire extinguisher comprises an annular body, the annular body being provided with a fire transmission channel running through the inner and outer sides of the annular body, and the annular body being provided with a gas channel; the fire transmission channel comprising an inner section and an outer section arranged sequentially from the inside to the outside, the outer section having a larger diameter than the inner section; the inner wall of the fire transmission channel being provided with a plurality of fire transmission holes connected to the gas channel, the upper end surfaces of the fire transmission holes being higher than the bottom of the fire transmission channel; Wherein, a plurality of main fire holes are provided on the outer side of the annular body, and the main fire holes are connected to the gas channel; A flame stabilizing groove is provided on the outer side of the annular body, the flame stabilizing groove is communicated with the main fire hole, the flame stabilizing groove is located below the main fire hole, a lower flame stabilizing hole is provided below the flame stabilizing groove, and the lower flame stabilizing hole is communicated with the gas channel; A buffer groove communicating with the flame stabilizing groove is provided at the opening of the outer section, and the width of the buffer groove is greater than that of the flame stabilizing groove.

2. The outer fire cover according to claim 1, characterized in that: The height difference between the upper end surface of the fire transfer hole and the bottom of the fire transfer channel is greater than 1 mm.

3. The outer fire cover according to claim 1, characterized in that: The diameter of the inner section is greater than 3 mm.

4. The outer fire cover according to claim 1, characterized in that: There is a smooth transition between the inner section and the outer section.

5. The outer fire cover according to claim 1, characterized in that: An upper flame stabilization hole is provided on the outer side of the annular body. The upper flame stabilization hole is located on the outer side of the main fire hole and is communicated with the gas channel.

6. The outer fire cover according to claim 5, characterized in that: There are multiple upper flame stabilization holes, which are evenly distributed on the outside of the annular body; there are multiple lower flame stabilization holes, which are evenly distributed on the lower side of the flame stabilization groove.

7. A burner, characterized in that: The burner comprises the outer fire cover according to any one of claims 1-6.

Images