阅读说明：本技术 用于制冷设备的泄压门封和制冷设备 (Pressure relief door seal for refrigeration equipment and refrigeration equipment ) 是由 韦明堂 吴文超 常见虎 任伟 程旺 于 2020-05-08 设计创作，主要内容包括：本发明公开了一种用于制冷设备的泄压门封和制冷设备,用于制冷设备的泄压门封包括：相连的多个门封条,所述门封条具有内腔；泄压件,所述泄压件封装在所述内腔内且沿前后方向倾斜延伸,所述泄压件的第一端与所述门封条可转动地相连,所述泄压件的第二端与所述内腔的后壁相连,所述泄压件上设有向后突出的定位柱,所述定位柱位于所述泄压件的第一端和第二端之间且与所述内腔的后壁相抵。根据本发明的用于制冷设备的泄压门封,可以解决用户开门费力的问题,无需用户附加多余动作,方便用户的使用,提升了用户的体验,并且,可以节约空间、简化结构、降低成本,还可以避免排水管的倒吸、异音及反应慢等问题。(The invention discloses a pressure relief door seal for refrigeration equipment and the refrigeration equipment, the pressure relief door seal for the refrigeration equipment comprises: a plurality of door seals connected, the door seals having an interior cavity; the door seal is characterized in that the pressure relief piece is encapsulated in the inner cavity and obliquely extends along the front-back direction, the first end of the pressure relief piece is rotatably connected with the door seal, the second end of the pressure relief piece is connected with the rear wall of the inner cavity, a positioning column protruding backwards is arranged on the pressure relief piece, and the positioning column is located between the first end and the second end of the pressure relief piece and abuts against the rear wall of the inner cavity. According to the pressure relief door seal for the refrigeration equipment, the problem that a user is hard to open a door can be solved, additional redundant actions are not needed, the use of the user is facilitated, the user experience is improved, the space can be saved, the structure is simplified, the cost is reduced, and the problems of back suction, abnormal sound, slow reaction and the like of a drain pipe can be avoided.)

1. A pressure relief door seal for a refrigeration unit, comprising:

a plurality of door seals connected, the door seals having an interior cavity;

the door seal is characterized in that the pressure relief piece is encapsulated in the inner cavity and obliquely extends along the front-back direction, the first end of the pressure relief piece is rotatably connected with the door seal, the second end of the pressure relief piece is connected with the rear wall of the inner cavity, a positioning column protruding backwards is arranged on the pressure relief piece, and the positioning column is located between the first end and the second end of the pressure relief piece and abuts against the rear wall of the inner cavity.

2. The pressure relief dock seal for a refrigeration appliance according to claim 1, further comprising:

the positioning piece is packaged in the inner cavity and located on the front side of the pressure relief piece, and the first end of the pressure relief piece is rotatably connected with the positioning piece.

3. The pressure relief door seal for a refrigeration apparatus as recited in claim 2 wherein said pressure relief member and said positioning member are formed by bending an elastic member and said pressure relief member is rotatable by its elastic deformation.

4. The pressure relief door seal for a refrigeration unit of claim 2, wherein said locating member extends in the same direction as said door seal.

5. The pressure relief door seal for a refrigeration unit of claim 2, wherein a distance between the second end of said pressure relief member and said positioning member is greater than a distance between said positioning post and said positioning member.

6. The pressure relief door seal for a refrigeration unit of claim 1, wherein a second end of said pressure relief member is flush with a rear surface of said positioning post in a front-to-rear direction.

7. The pressure relief dock seal for a refrigeration appliance of claim 1, wherein the dock seal comprises:

the sealing device comprises a first sealing strip and a second sealing strip, wherein the first sealing strip is connected with the second sealing strip, the first sealing strip is located on the front side of the second sealing strip and defines the inner cavity together with the second sealing strip.

8. The pressure relief dock seal for a refrigeration appliance of claim 1, wherein said first seal defines an interior rearwardly opening groove, said pressure relief member is mounted in said interior groove, and a portion of a front wall of said second seal defines a rear wall of said interior cavity.

9. The pressure relief door seal for a refrigeration unit as claimed in any one of claims 1 to 8, wherein a plurality of said door seals enclose a rectangular frame, each of said door seals being provided with said pressure relief member.

10. A refrigeration apparatus, comprising:

the pressure relief dock seal for a refrigeration appliance according to any one of claims 1 to 9;

the door seal comprises a door body and a box body, wherein a plurality of door seals are arranged between the door body and the box body.

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a pressure relief door seal for the refrigeration equipment and the refrigeration equipment with the pressure relief door seal for the refrigeration equipment.

Background

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the pressure relief door seal for the refrigeration equipment can solve the problem that a user needs to open a door difficultly, does not need additional extra actions, is convenient for the user to use, improves the user experience, saves space, simplifies the structure, reduces the cost, and can avoid the problems of suck-back, abnormal sound, slow reaction and the like of a drain pipe.

The invention also provides the refrigeration equipment with the pressure relief door seal for the refrigeration equipment.

According to the embodiment of the first aspect of the invention, the pressure relief door seal for the refrigeration equipment comprises: a plurality of door seals connected, the door seals having an interior cavity; the door seal is characterized in that the pressure relief piece is encapsulated in the inner cavity and obliquely extends along the front-back direction, the first end of the pressure relief piece is rotatably connected with the door seal, the second end of the pressure relief piece is connected with the rear wall of the inner cavity, a positioning column protruding backwards is arranged on the pressure relief piece, and the positioning column is located between the first end and the second end of the pressure relief piece and abuts against the rear wall of the inner cavity.

According to the pressure relief door seal for the refrigeration equipment, the pressure relief piece is arranged in the door seal, the pressure relief piece rotates by means of suction force of the refrigeration equipment, and the second end of the pressure relief piece pulls the door seal to generate local deformation, so that the inner space and the outer space of the refrigeration equipment are communicated, and the purpose of pressure relief is achieved. Therefore, the pressure difference inside and outside the refrigeration equipment can be balanced, the problem that the user needs to open the door difficultly is solved from the source of the labor for opening the door, and meanwhile, the pressure relief piece is harmful and favorable, so that the movement amplitude can be automatically adjusted according to the pressure difference, the local deformation of the door seal is automatically controlled, the user does not need to add extra action, the use by the user is facilitated, and the user experience is improved; in addition, the pressure relief piece and the door seal are integrated, so that the space can be saved, the structure can be simplified, the structures and the manufacturing processes of the door body and the box body do not need to be changed, and the cost is reduced; in addition, the circulation path of the gas inside and outside the refrigeration equipment is short, the reaction of the balance pressure difference is fast, the pressure loss is small, and the problems of back suction, abnormal sound, slow reaction and the like of the drain pipe can be avoided.

In addition, the pressure relief door seal for the refrigeration equipment according to the embodiment of the invention also has the following additional technical characteristics:

according to some embodiments of the invention, a pressure relief dock seal for a refrigeration appliance further comprises: the positioning piece is packaged in the inner cavity and located on the front side of the pressure relief piece, and the first end of the pressure relief piece is rotatably connected with the positioning piece.

In some embodiments of the present invention, the pressure relief piece and the positioning piece are formed by bending an elastic piece and the pressure relief piece and the positioning piece can rotate through the elastic deformation of the pressure relief piece and the positioning piece.

In some embodiments of the present invention, the extending direction of the positioning element is the same as the extending direction of the door seal.

In some embodiments of the present invention, a distance between the second end of the pressure relief piece and the positioning member is greater than a distance between the positioning post and the positioning member.

According to some embodiments of the invention, the second end of the pressure relief is flush with the rear surface of the positioning post in the fore-aft direction.

According to some embodiments of the invention, the door seal comprises: the sealing device comprises a first sealing strip and a second sealing strip, wherein the first sealing strip is connected with the second sealing strip, the first sealing strip is located on the front side of the second sealing strip and defines the inner cavity together with the second sealing strip.

According to some embodiments of the invention, the first seal is provided with an inner groove open to the rear, the bleeder is mounted in the inner groove, a portion of the front wall of the second seal constitutes the rear wall of the inner cavity.

According to some embodiments of the invention, a plurality of the door seals are enclosed into a rectangular frame, each of the door seals being provided with the bleeder.

The refrigeration equipment according to the embodiment of the second aspect of the invention comprises: the pressure relief door seal for the refrigeration equipment is characterized by comprising a pressure relief door seal body, a pressure relief door seal body and a pressure relief door seal body, wherein the pressure relief door seal body is arranged on the pressure relief door seal body; the door seal comprises a door body and a box body, wherein a plurality of door seals are arranged between the door body and the box body.

According to the refrigeration equipment provided by the embodiment of the invention, the pressure difference between the inside and the outside of the refrigeration equipment can be balanced, the problem that the user needs to open the door difficultly is solved from the source of the labor for opening the door, and meanwhile, the user does not need to add extra actions, so that the refrigeration equipment is convenient for the user to use, and the user experience is improved; in addition, the space can be saved, the structure can be simplified, the structure and the manufacturing process of the door body and the box body are not required to be changed, the cost is reduced, and the problems of back suction, abnormal sound, slow reaction and the like of the drain pipe can be avoided.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a perspective view of a refrigeration unit according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of section A circled in FIG. 1;

FIG. 3 is a partial schematic view of a pressure relief dock seal for a refrigeration appliance according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the working principle of a pressure relief door seal for a refrigeration appliance according to an embodiment of the present invention;

FIG. 5 is a partial perspective view of a door seal according to an embodiment of the present invention;

fig. 6 is an enlarged schematic view of a portion B circled in fig. 5.

Reference numerals:

a refrigerating device 1,

A door body 10, a box body 20,

A door seal 30, a first seal 31, a second seal 32, an inner groove 33,

Pressure relief piece 40, reference column 41, keeper 50.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A pressure relief dock seal for a refrigeration appliance, for example a refrigeration appliance 1 which may be a refrigerator, according to an embodiment of the first aspect of the invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 6, a pressure relief door seal for a refrigeration device according to an embodiment of the present invention includes: a door seal 30 and a pressure relief member 40.

Specifically, the door seal 30 is a plurality of connected door seals, and each door seal 30 has an inner cavity. The pressure relief member 40 is enclosed in the inner cavity, the pressure relief member 40 extends obliquely in the front-rear direction, a first end of the pressure relief member 40 is rotatably connected to the door seal 30, and a second end of the pressure relief member 40 is connected to the rear wall of the inner cavity. Here, it should be understood that the directions in the present application are based on the direction when the refrigeration apparatus 1 is closed, and "front" refers to the direction facing the user, and "rear" refers to the direction facing away from the user. For example, the rear wall of the interior cavity is remote from the exterior surface of the door body relative to the front wall of the interior cavity.

Wherein, the pressure relief piece 40 is provided with a positioning column 41 protruding backwards, the positioning column 41 is located between the first end and the second end of the pressure relief piece 40, and the positioning column 41 is abutted against the rear wall of the inner cavity.

For example, the door seal 30 may be a high elastic plastic member, which may be generally elongated in shape, and the length of some of the door seals 30 may be oriented in the up-down direction, such that the pressure relief member 40 may extend obliquely upward from front to back along the length of the door seal 30. At this time, the first end of the pressure relief element 40 refers to the front end of the pressure relief element 40, the front end of the pressure relief element 40 may be directly rotatably connected to the front wall of the inner cavity, and the front end of the pressure relief element 40 may also be rotatably connected to the door seal 30 through other intermediate structures; the second end of the pressure relief member 40 refers to the rear end of the pressure relief member 40, and the rear end of the pressure relief member 40 may be connected to the rear wall of the inner cavity by gluing or the like. The positioning column 41 is disposed on one side of the pressure relief member 40 close to the rear wall of the inner cavity, the positioning column 41 may be cylindrical, and a top end of the positioning column 41 abuts against the rear wall of the inner cavity.

It is understood that the door seal 30 can be installed between the door and the cabinet of the refrigeration device 1, so as to perform a sealing function. When the refrigeration device 1 operates, the internal temperature of the refrigeration device 1 decreases, and a pressure difference is formed between the inside and the outside of the refrigeration device 1. When a user opens the door body of the refrigeration equipment 1 to take articles, cold air in the refrigeration equipment 1 overflows, and outside hot air enters the refrigeration equipment 1; after a user finishes taking articles to close the door body, the hot air entering the refrigeration equipment 1 is rapidly cooled, the pressure difference between the inside and the outside of the refrigeration equipment 1 is rapidly increased, the suction force generated by the pressure difference enables the gap between the door body and the box body to be reduced, and the door seal strip 30 is compressed.

Because the positioning column 41 is abutted against the rear wall of the inner cavity, that is, the top end of the positioning column 41 is just abutted against the side of the door seal 30 contacting with the box body, under the action of the force of the refrigeration equipment 1 compressing the door seal 30, the second ends of the positioning column 41 and the pressure relief piece 40 are firstly stressed to drive the pressure relief piece 40 to rotate, the second end of the pressure relief piece 40 is close to the front wall of the inner cavity and drives the door seal 30 at the joint to be locally deformed, so that the inside and the outside of the refrigeration equipment 1 are communicated.

It can be understood that the pressure relief member 40 can automatically adjust the rotation amplitude according to the difference between the internal pressure and the external pressure of the refrigeration equipment 1, so as to automatically control the local deformation of the door seal 30, thereby implementing the self-adaptive function of the pressure relief member 40. For example, when the difference between the inside pressure and the outside pressure of the refrigeration apparatus 1 is larger, the extrusion force of the refrigeration apparatus 1 to the door seal 30 is larger, the rotation amplitude of the second end of the pressure relief piece 40 is larger, and the local deformation of the door seal 30 is larger, so that the purpose of rapid pressure relief is achieved, and the user is more labor-saving in opening the door.

According to the pressure relief door seal for the refrigeration equipment, the pressure relief piece 40 is arranged in the door seal 30, the pressure relief piece 40 rotates by means of the suction force of the refrigeration equipment 1, and the second end of the pressure relief piece 40 pulls the door seal 30 to generate local deformation, so that the inner space and the outer space of the refrigeration equipment 1 are communicated, and the purpose of pressure relief is achieved. Therefore, the pressure difference inside and outside the refrigeration equipment 1 can be balanced, the problem that the user needs to open the door difficultly is solved from the source of the labor for opening the door, and meanwhile, the pressure relief piece 40 is harmful and beneficial, so that the movement amplitude can be automatically adjusted according to the pressure difference, the local deformation of the door seal 30 is automatically controlled, the additional redundant action of the user is not needed, the use of the user is facilitated, and the user experience is improved; in addition, the pressure relief piece 40 is integrated with the door seal 30, so that the space can be saved, the structure can be simplified, the structures and the manufacturing processes of the door body and the box body do not need to be changed, and the cost is reduced; in addition, the circulation path of the gas inside and outside the refrigeration equipment 1 is short, the reaction of the balance pressure difference is fast, the pressure loss is small, and the problems of back suction, abnormal sound, slow reaction and the like of the drain pipe can be avoided.

According to some embodiments of the present invention, as shown in fig. 2, a pressure relief dock seal for a refrigeration appliance further comprises: the positioning member 50. A positioning member 50 is enclosed within the cavity, the positioning member 50 being located forward of the pressure relief member 40, and a first end of the pressure relief member 40 being rotatably coupled to the positioning member 50. Thus, the positioning member 50 can perform a positioning function, the installation accuracy of the pressure relief member 40 is ensured by the cooperation of the pressure relief member 40 and the positioning member 50, and the rotation of the pressure relief member 40 is facilitated. For example, the bleeder 40 and the retainer 50 may be one piece; alternatively, the relief member 40 and the positioning member 50 may be two separate pieces, wherein the positioning member 50 is attached to the front wall of the interior cavity, and the front end of the relief member 40 may be pivotally attached to the positioning member 50 by a hinge or the like.

In some embodiments of the present invention, as shown in fig. 3, the relief member 40 and the positioning member 50 are formed by bending an elastic member, which realizes the rotation of the relief member 40 by its elastic deformation. Therefore, the rotation action required by the work can be completed by utilizing the elastic deformation of the self-body, the structure is simple and reliable, and the cost is lower. For example, a single piece of spring steel may be bent to form the pressure relief member 40 and the positioning member 50, the bent piece of spring steel may be entirely V-shaped, and one side of the bent piece of spring steel may form the pressure relief member 40 and the other side may form the positioning member 50.

In some embodiments of the present invention, as shown in fig. 2, the positioning member 50 extends in the same direction as the door seal 30. Therefore, the installation and the positioning of the positioning piece 50 are convenient, and the uniformity of the internal structure of the door seal 30 is ensured. For example, the positioning member 50 extends along the longitudinal direction of the door seal 30, and the longitudinal direction of the door seal 30 is oriented in the up-down direction (or the left-right direction).

In some embodiments of the present invention, as shown in fig. 4, the distance between the second end of the pressure relief member 40 and the positioning member 50 is greater than the distance between the positioning post 41 and the positioning member 50. Thus, when the pressure relief member 40 rotates, the rotation radius of the second end of the pressure relief member 40 is larger than the rotation radius of the positioning post 41, that is, the length of the arc that the second end of the pressure relief member 40 travels is larger than the length of the arc that the positioning post 41 travels at the same rotation angle, and the displacement of the second end of the pressure relief member 40 in the front-rear direction is larger than the displacement of the positioning post 41 in the front-rear direction, thereby causing the local deformation of the door seal 30.

For example, when a pressure difference exists between the inside and the outside of the refrigeration device 1, the door body compresses the door seal 30 under the action of a suction force, under the extrusion action of the door body on the door seal 30, the pressure relief piece 40 rotates with the first end of the pressure relief piece 40 as a rotation center, the pressure relief piece 40 rotates towards the direction towards the positioning piece 50, the angular velocity of the second end of the pressure relief piece 40 is the same as the angular velocity of the positioning column 41, but due to different rotation radii, the linear velocity of the second end of the pressure relief piece 40 is different from the linear velocity of the positioning column 41, and the linear velocity of the second end of the pressure relief piece 40 is greater than the linear velocity of the positioning column 41, so that a displacement difference between the second end of the pressure relief piece 40 and the positioning column 41 in the front-back direction is caused, and due to the existence of the displacement difference, the second end of the.

As shown in fig. 4, when the refrigeration equipment 1 applies a pressing force F to the top end of the positioning column 41, the pressure relief piece 40 rotates, the displacement of the second end of the pressure relief piece 40 in the front-back direction is L2, and the displacement of the positioning column 41 in the front-back direction is L1, where L2> L1 is that the movement amplitude of the second end of the pressure relief piece 40 is larger.

According to some embodiments of the present invention, as shown in fig. 4, the second end of the relief 40 is flush with the rear surface of the positioning post 41 in the front-rear direction. Like this, on the one hand, can guarantee the planarization of door strip of paper used for sealing 30 surface under the no pressure difference state, make things convenient for door strip of paper used for sealing 30 to closely laminate between the door body and the box to guarantee the leakproofness of refrigeration plant 1 under the no pressure difference state, on the other hand, when there is pressure differential inside and outside refrigeration plant 1, the top of reference column 41 can be extruded to the door body, thereby impel to let out the piece 40 of pressing take place to rotate.

According to some embodiments of the present invention, as shown in FIG. 1, a door seal 30 includes: a first seal 31 and a second seal 32. The first seal 31 is connected with the second seal 32, the first seal 31 is located at the front side of the second seal 32, and the first seal 31 and the second seal 32 jointly define an inner cavity. In this way, the packaging of the bleeder 40 and the positioning member 50 is facilitated. For example, the bleeder 40 and the positioning member 50 may be installed first, and then the first seal 31 may be connected to the second seal 32 to form the door seal 30.

According to some embodiments of the present invention, as shown in fig. 1, the first seal 31 is provided with an inner groove 33 opened rearward, the pressure relief member 40 is installed in the inner groove 33, and a part of the front wall of the second seal 32 constitutes the rear wall of the inner cavity. Thus, the installation of the pressure relief member 40 is more convenient and accurate, ensuring smooth assembly of the overall structure. For example, the bottom wall of the inner tank 33 forms the front wall of the inner cavity, the positioning member 50 is fixed to the bottom wall of the inner tank 33, and the second end of the bleeder 40 is connected to the front wall of the second seal 32.

According to some embodiments of the present invention, as shown in FIG. 1, a plurality of door seals 30 are enclosed into a rectangular frame, each door seal 30 being provided with a bleeder 40. Like this, the pressure release effect is better, and the user is laborsaving more opening the door.

As shown in fig. 1 to 6, a refrigeration apparatus 1 according to an embodiment of the second aspect of the present invention includes: the pressure relief door seal, the door body 10 and the refrigerator body 20 for the refrigeration equipment according to the embodiment of the first aspect of the invention. Wherein, a plurality of door seals 30 are installed between the door 10 and the cabinet 20.

For example, the refrigeration device 1 may be a refrigerator, the door 10 is fixed to the cabinet 20 by an upper hinge and a lower hinge, a plurality of door seals 30 are arranged in a circle between the door 10 and the cabinet 20, and the door seals 30 are fixed to the door 10 for sealing.

The front wall of the first seal 31 may be glued to the door 10, the positioning element 50 is tightly glued to the side of the door seal 30 contacting the door 10 (i.e. the front wall of the inner cavity), and the positioning element 50 is parallel to the door 10 and the cabinet 20, respectively. The top end of the positioning pillar 41 is equal to the height of the second end of the pressure relief part 40 (for example, the front end of the pressure relief part 40), the top end of the positioning pillar 41 and the second end of the pressure relief part 40 just abut against the side of the door seal 30 contacting the box body 20 (i.e., the rear wall of the inner cavity), there is no connection between the positioning pillar 41 and the door seal 30, the second end of the pressure relief part 40 is well connected with the door seal 30, and the door seal 30 can be driven to deform locally.

From this, through set up the pressure release door seal that is used for refrigeration plant between door body 10 and box 20, can balance the pressure differential inside and outside refrigeration plant 1 fast, make door body 10 open more easily, and, the compression of pressure release 40, kick-back mainly relies on the elastic deformation of the bending part between setting element 50 and pressure release 40 to realize, namely, utilize the suction between door body 10 and the box 20 to realize the compression of pressure release 40, utilize the elastic deformation of spring steel itself to realize the kick-back of pressure release 40, moreover, the steam generator is simple in structure, can realize automatic work, in addition, because pressure release 40 sets up in door seal 30, can not influence the respective structure and the technological condition of door body 10 and box 20, and the economic nature is good.

Wherein, the opening degree of pressure release door seal (being the local deformation degree of door strip of paper used for sealing 30) becomes positive correlation with the pressure differential inside and outside refrigeration plant 1, that is to say, the pressure differential inside and outside refrigeration plant 1 is big more, the opening degree of pressure release door seal is big more, and along with the reduction of pressure differential, pressure release member 40 is kick-backed gradually and is reset, reduces the hourglass cold to realize automatic pressure release balance.

According to the refrigeration equipment 1 disclosed by the embodiment of the invention, the pressure difference between the inside and the outside of the refrigeration equipment 1 can be balanced, the problem that the user needs to open the door difficultly is solved from the source of the labor for opening the door, and meanwhile, the user does not need to add extra actions, so that the use of the user is facilitated, and the user experience is improved; in addition, the space can be saved, the structure can be simplified, the structures and the manufacturing processes of the door body 10 and the box body 20 do not need to be changed, the cost is reduced, and the problems of back suction, abnormal sound, slow reaction and the like of the drain pipe can be avoided.

Alternatively, the pressure relief members 40 are preferably arranged in the door seals 30 located at four positions corresponding to the upper, lower, left, and right positions of the door body 10, and the number of the arranged pressure relief members 40 may be determined according to specific requirements. Thus, different arrangements of the pressure relief member 40 can be selected according to different situations, and the adaptability is strong.

Other constructions and operations of the refrigerating apparatus 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

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

In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. The first feature being "on," "over" and "above" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "a specific embodiment," "an example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.