Patent ID: 12228316

DESCRIPTION OF EMBODIMENTS

Embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are examples, and are intended to explain this application, but shall not be understood as a limitation on this application. In the description of this application, it should be understood that an orientation or positional relationship indicated by the term “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “internal”, “external”, “clockwise”, “counterclockwise”, “axial direction”, “radial direction”, “circumferential direction”, or the like is based on an orientation or positional relationship shown in the accompanying drawings, and is merely for ease of describing this application and simplifying the description, but does not indicate or imply that an apparatus or an element fixture referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

As shown inFIG.1toFIG.24, a heat exchange apparatus according to embodiments of this application includes a heat exchanger10, a refrigerant adjustment component20, and a first connecting member30.

The heat exchanger10includes a first pipe1, a second pipe2, and a plurality of heat exchange tubes3. The first pipe1and the second pipe2are arranged spaced apart. As shown inFIG.1, the first pipe1and the second pipe2are spaced apart in a front-rear direction. Specifically, the first pipe1and the second pipe2are arranged roughly in parallel. As shown inFIG.1andFIG.14, both the first pipe1and the second pipe2roughly extend in a left-right direction. In other words, both a length direction of the first pipe1and a length direction of the second pipe2are the left-right direction.

The plurality of heat exchange tubes3are arranged spaced apart in the length direction of the first pipe1. As shown inFIG.1andFIG.14, the plurality of heat exchange tubes3are arranged spaced apart in the left-right direction.

The heat exchanger10further includes an edge plate4, and the edge plate4is located on an outer side of the plurality of heat exchange tubes3in the length direction of the first pipe1. It should be noted herein that a direction toward a center position in the length direction of the first pipe1is inward, and a direction away from the center position in the length direction of the first pipe1is outward. Specifically, there are at least two edge plates4, one of the edge plates4is located on a rightmost side of the plurality of heat exchange tubes3, and another edge plate4is located on a leftmost side of the plurality of heat exchange tubes3.

At least part of the refrigerant adjustment component20is located on an outer side of the edge plate4in the length direction of the first pipe1. In other words, the refrigerant adjustment component20is arranged on a side, away from the plurality of heat exchange tubes3, of the edge plate4. Specifically, the refrigerant adjustment component20may be located on a left side of a left edge plate, and/or on a right side of a right edge plate4.

The refrigerant adjustment component20includes a cavity for accommodating refrigerant and an outer wall enclosing the cavity. The outer wall of the refrigerant adjustment component20has an opening for refrigerant flow. An included angle between an axis in a length direction of at least part of the outer wall of the refrigerant adjustment component20and an axis in the length direction of the first pipe1is greater than 0° and less than or equal to 90°.

The first connecting member30communicates the opening of the refrigerant adjustment component20and the first pipe1, and in a direction of gravity, the opening of the refrigerant adjustment component20is higher than a communication position between the first connecting member30and the first pipe1. Specifically, one end of the first connecting member30is connected to the opening of the refrigeration adjustment component20, and the other end of the first connecting member30is communicated with the first pipe1. The other end of the first connecting member30may be directly communicated with the first pipe1, and in this case, the opening of the refrigerant adjustment component20is higher than the communication position between the other end of the first connecting member30and the first pipe1. Alternatively, an end of the first pipe1in the length direction is connected to an inlet/outlet pipe5, and the inlet/outlet pipe5is communicated with the other end of the first connecting member30. In this case, the opening of the refrigerant adjustment component20is higher than a communication position between the other end of the first connecting member30and the inlet/outlet pipe5.

In a heat pump system, that a volume of an outdoor heat exchanger is greater than that of an indoor heat exchanger is used as an example. When the heat pump system switches from a cooling mode to a heating mode, the indoor heat exchanger serves as a condenser. Injection space of the indoor heat exchanger is limited. Therefore, according to the heat exchange apparatus in this application, the refrigerant adjustment component20communicated with the first pipe1through the first connecting member30is disposed on the outer side of the edge plate4in the length direction of the first pipe1. The included angle between the axis in the length direction of the at least part of the outer wall of the refrigerant adjustment component20and the axis in the length direction of the first pipe1is greater than 0° and less than or equal to 90°. Excess refrigerant enters the refrigerant adjustment component20communicated with the heat exchanger10, and excess liquid refrigerant is stored by using the refrigerant adjustment component20, to improve an operating capability of the heat pump system. When the heat pump system switches from the heating mode to the cooling mode, the indoor heat exchanger serves as an evaporator, and the heat pump system needs more refrigerant to improve heat exchange efficiency. In this case, in the direction of gravity, the opening of the refrigerant adjustment component20is higher than the communication position between the first connecting member30and the first pipe1, and liquid refrigerant in the refrigerant adjustment component20flows into the heat exchanger10because of gravity of the liquid refrigerant to participate in heat exchange of the heat pump system, so as to improve heat exchange performance. In this way, the heat exchange apparatus according to the embodiments of this application is used as a smaller-volume heat exchanger, so that when the heat pump system switches between the cooling mode and the heating mode, refrigerant in the heat pump system can be compensated and adjusted. Therefore, an amount of exchanged heat and an energy efficiency ratio on the indoor side are stabilized in both the cooling mode and the heating mode, thereby improving efficiency of the heat pump system.

In some specific embodiments, as shown inFIG.15toFIG.24, the plurality of heat exchange tubes3are arranged in parallel, and each heat exchange tube3extends in an up-down direction, so that the heat exchanger10is a parallel flow heat exchanger.

It can be understood that this application is not limited thereto. In some other embodiments, as shown inFIG.1toFIG.13, the heat exchange tube3includes a first straight section31, a second straight section32, and a connecting section33. One end of the first straight section31in a length direction of the first straight section31is inserted into the first pipe1to be communicated with the first pipe1, and the other end of the first straight section31in the length direction of the first straight section31is communicated with one end of the connecting section33. One end of the second straight section32in a length direction of the second straight section32is inserted into the second pipe2to be communicated with the second pipe2, and the other end of the second straight section32in the length direction of the second straight section32is communicated with the other end of the connecting section33. The connecting section33is bent with respect to the first straight section31and the second straight section32. The first straight section31, the connecting section33, and the second straight section32include a channel, and the channel communicates the first pipe1and the second pipe2. An included angle between the length direction of the first straight section31and the length direction of the second straight section32is greater than or equal to 0° and less than 180°. Therefore, the heat exchanger10is a bent heat exchanger.

Specifically, a lower end of the first straight section31is inserted into the first pipe1to be communicated with the first pipe1, and a lower end of the second straight section32is inserted into the second pipe2to be communicated with the second pipe2. The connecting section33connects an upper end of the first straight section31and an upper end of the second straight section32, and is bent with respect to the first straight section31and the second straight section32. It should be noted herein that the connecting section33may be shown inFIG.12andFIG.13, the connecting section33extends in the left-right direction, and the connecting section33is communicated with a plurality of first straight sections31and communicated with a plurality of second straight sections32. It can be understood that this application is not limited thereto. For example, the connecting section33may alternatively be a curved section. The curved section may be bent only with respect to the first straight section31and the second straight section32, as shown inFIG.6. The curved section may alternatively be twisted and bent with respect to the first straight section31and the second straight section32, as shown inFIG.1.

The heat exchange tube3includes at least one channel, and the channel extends from the first straight section31to the second straight section32through the connecting section33, so as to communicate the first pipe1and the second pipe2. The first straight section31and the second straight section32may be arranged roughly in parallel, for example, both the first straight section31and the second straight section32extend in the up-down direction. In addition, the length direction of the first straight section31and the length direction of the second straight section32may have an included angle, and the included angle is greater than 0° and less than 180°.

The edge plate4includes a first edge plate41located on an outer side of first straight sections31of the plurality of heat exchange tubes3in the length direction of the first pipe1, and a second edge plate42located on an outer side of second straight sections32of the plurality of heat exchange tubes3in the length direction of the first pipe1. In other words, the outer side of the plurality of first straight sections31in the length direction of the first pipe1and the outer side of the plurality of second straight sections32in the length direction of the first pipe1each are provided with the edge plates4. It should be noted herein that a direction toward a center position in the length direction of the first pipe1is inward, and a direction away from the center position in the length direction of the first pipe1is outward. Specifically, there are at least two first edge plates41, one of the first edge plates41is located on a rightmost side of the plurality of first straight sections31, and another first edge plate41is located on a leftmost side of the plurality of first straight sections31; there are at least two second edge plates42, one of the second edge plates42is located on a rightmost side of the plurality of second straight sections32, and another second edge plate42is located on a leftmost side of the plurality of second straight sections32.

At least part of the refrigerant adjustment component20is located on an outer side of the first edge plate41and the second edge plate42in the length direction of the first pipe1. In other words, the refrigerant adjustment component20is arranged on a side, away from the plurality of heat exchange tubes3, of the edge plate4. Specifically, the refrigerant adjustment component20may be located on a left side of a left first edge plate41and a left second edge plate42, and/or on a right side of a right first edge plate41and a right second edge plate42.

In some embodiments, the edge plate4includes a first side surface and a second side surface in the length direction of the first pipe1, and the refrigerant adjustment component20is connected to at least one of the first side surface and the second side surface of the edge plate4. In other words, in this embodiment, the refrigerant adjustment component20is mounted on the edge plate4.

Specifically, in the embodiment shown inFIG.14, the refrigerant adjustment component20is mounted on the left edge plate4, and may be connected to a left side surface of the left edge plate4. It can be understood that this application is not limited thereto. The refrigerant adjustment component20may alternatively be connected to a right side surface of the left edge plate4. In this case, a dimension of the left edge plate4in the front-rear direction perpendicular to the up-down direction and the left-right direction (for example, a width of the left edge plate4) is greater than a dimension of the heat exchange tube3in the front-rear direction (which is, for example, when the heat exchange tube3is a flat tube, a width of the flat tube), so as to exceed the heat exchange tube3in the front-rear direction. The refrigerant adjustment component20is connected to a right side surface of a part, exceeding the heat exchange tube3, of the left edge plate4.

When the heat exchanger10is a bent heat exchanger, as shown inFIG.1toFIG.13, the length direction of the first straight section31is parallel to the length direction of the second straight section32. The first edge plate41and the second edge plate42each include a first side surface and a second side surface in the length direction of the first pipe1. The refrigerant adjustment component20is connected to at least one of the first side surface and the second side surface of the first edge plate41, and/or at least one of the first side surface and the second side surface of the second edge plate42. For example, the first straight section31and the second straight section32are spaced apart in the front-rear direction and are arranged roughly in parallel, the first pipe1extends in the left-right direction, and the first edge plate41and the second edge plate42each include an inner side surface and an outer side surface that are arranged opposite to each other. An inner side surface of the left first edge plate41/second edge plate42is a right side surface of this first edge plate41/second edge plate42, and an outer side surface of the left first edge plate41/second edge plate42is a left side surface of this first edge plate41/second edge plate42. An inner side surface of the right first edge plate41/second edge plate42is a left side surface of this first edge plate41/second edge plate42, and an outer side surface of the right first edge plate41/second edge plate42is a right side surface of this first edge plate41/second edge plate42. The refrigerant adjustment component20is connected to at least one of the left side surface and the right side surface of the first edge plate41and/or at least one of the left side surface and the right side surface of the second edge plate42.

In some specific embodiments, the refrigerant adjustment component20may be connected to the first edge plate41/second edge plate42on either side of the left side and the right side. Specifically, the refrigerant adjustment component20may be all located on the outer side of this first edge plate41/second edge plate42, and may be connected to the outer side surface of the first edge plate41and the outer side surface of the second edge plate42; or may be connected only to the outer side surface of the first edge plate41, or only to the outer side surface of the second edge plate42. Alternatively, the refrigerant adjustment component20may be all located on the inner side of this first edge plate41and/or second edge plate42, and may be connected to the inner side surface of the first edge plate41and the inner side surface of the second edge plate42; or may be connected only to the inner side surface of the first edge plate41, or only to the inner side surface of the second edge plate42. Alternatively, a part of the refrigerant adjustment component20may be located on the outer side of the first edge plate41and/or the second edge plate42, and the other part is located on the inner side of the first edge plate41and/or the second edge plate42.

In some other specific embodiments, a part of the refrigerant adjustment component20may be connected to the first edge plate41and/or the second edge plate42on the left side, and the other part may be connected to the first edge plate41and/or the second edge plate42on the right side.

It can be understood that this application is not limited to a form in which the refrigerant adjustment component20is mounted on the edge plate4. For example, in some other embodiments, the heat exchange apparatus further includes a mounting member6, the mounting member6is disposed on an outer side of the edge plate4in the length direction of the first pipe1, and the refrigerant adjustment component20is fixedly connected to the mounting member6.

Specifically, in the embodiment shown inFIG.14, the mounting member6is connected to the left side surface of the left edge plate4, and the refrigerant adjustment component20is mounted on the mounting member6.

When the heat exchanger10is a bent heat exchanger, as shown inFIG.1toFIG.13, the included angle between the length direction of the first straight section31and the length direction of the second straight section32is greater than 0° and less than 180°. The mounting member6is disposed on the outer side of the first edge plate41and the second edge plate42in the length direction of the first pipe1, and the refrigerant adjustment component20is fixedly connected to the mounting member6. In other words, when the first straight section31and the second straight section32have an included angle, the mounting member6is connected to the outer side surface of the first edge plate41and the outer side surface of the second edge plate42, and the refrigerant adjustment component20is mounted on the mounting member6. Specifically, as shown inFIG.1,FIG.5,FIG.6, andFIG.7, the refrigerant adjustment component20is fastened on the mounting member6by a fastener8.

Specifically, the mounting member6may be disposed only on an outer side of the first edge plate41and the second edge plate42on either side of the left side and the right side of the heat exchanger10. In this case, the refrigerant adjustment component20is disposed only on this side of the heat exchanger10, and as shown inFIG.1toFIG.5, the refrigerant adjustment component20is disposed only on the right side of the right first edge plate41and second edge plate42. Alternatively, the mounting member6may be disposed on an outer side of the first edge plate41and the second edge plate42on each side of the left side and the right side of the heat exchanger10. In this case, refrigerant adjustment components20may be disposed on both the left and right sides of the heat exchanger10, as shown inFIG.10.

In some specific embodiments, the mounting member6includes a first side surface and a second side surface arranged spaced apart in the length direction of the first pipe1, and the refrigerant adjustment component20is connected to at least one of the first side surface and the second side surface of the mounting member6. For example, the first pipe1extends in the left-right direction, and the mounting member6includes an inner side surface and an outer side surface that are opposite to each other in the left-right direction. The refrigerant adjustment component20may be connected to the inner side surface of the mounting member6, or may be connected only to the outer side surface of the mounting member6. Alternatively, a part of the refrigerant adjustment component may be connected to the inner side surface of the mounting member6, and the other part may be connected to the outer side surface of the mounting member6. A left side surface of the mounting member6located on the left side of the heat exchanger10is the outer side surface, and a right side surface thereof is the inner side surface. A right side surface of the mounting member6located on the right side of the heat exchanger10is the outer side surface, and a left side surface thereof is the inner side surface.

In the specific embodiments shown inFIG.1toFIG.5andFIG.8, the mounting member6is disposed on the right side of the right first edge plate41and second edge plate42, and the refrigerant adjustment component20is disposed on the right side of the mounting member6and is connected to the right side surface of the mounting member6.

In the specific embodiment shown inFIG.10, one mounting member6is disposed on the right side of the right first edge plate41and second edge plate42, and a part of the refrigerant adjustment component20is disposed on the right side of the mounting member6and is connected to the right side surface of the mounting member6. Another mounting member6is disposed on the left side of the left first edge plate41and second edge plate42, and the other part of the refrigerant adjustment component20is disposed on left side of the mounting member6and is connected to the left side surface of the mounting member6.

The arrangement position of the refrigerant adjustment component20in this application is not limited to those shown inFIG.1toFIG.5,FIG.8, andFIG.10. For example, in some other specific embodiments, the refrigerant adjustment component20includes a plurality of adjustment members21, at least one adjustment member21is connected to the first side surface of the mounting member6, and at least another adjustment member21is connected to the second side surface of the mounting member6. In other words, the refrigerant adjustment component20includes the adjustment member21located on the outer side of the mounting member6and is connected to the outer side surface of the mounting member6, and further includes the adjustment member21located on the inner side of the mounting member6and is connected to the inner side surface of the mounting member6. The adjustment member31located on the inner side of the mounting member6is located in inner space between the plurality of first straight sections31and the plurality of second straight sections32. As shown inFIG.11, the mounting member6is disposed on the right side of the right first edge plate41and second edge plate42, at least one adjustment member21of the refrigerant adjustment component20is disposed on the left side of the mounting member6and is connected to the left side surface of the mounting member6, and at least another adjustment member21of the refrigerant adjustment component20is disposed on the right side of the mounting member6and is connected to the right side surface of the mounting member6. The adjustment members21mounted on both the left and right sides of the mounting member6can save installation space, and the adjustment member21can exchange heat with intake air, to improve use efficiency.

In some embodiments, the refrigerant adjustment component20includes a plurality of adjustment members21, and every two of at least two adjustment members21are communicated with each other. The plurality of adjustment members21include a first adjustment member211. The first adjustment member211includes a cavity for accommodating refrigerant and an outer wall enclosing the cavity, and the outer wall of the first adjustment member211has an opening for refrigerant flow. There is one first connecting member30. The opening of the first adjustment member211is communicated with the first pipe1through the first connecting member30, and in the direction of gravity, the opening of the first adjustment member211is higher than the communication position between the first connecting member30and the first pipe1.

Specifically, the opening of only the first adjustment member211in the plurality of adjustment members21is communicated with the first pipe1through the first connecting member30, the first adjustment member211is communicated with one of the remaining adjustment members21, and every two of the remaining adjustment members21are communicated with each other, so that the plurality of adjustment members21are connected in series and then communicated with the first pipe1through the first connecting member30, as shown inFIG.1toFIG.7.

In the embodiments shown inFIG.1toFIG.5, there are two adjustment members21, the two adjustment members21are arranged spaced apart in the front-rear direction, and the front adjustment member21is a first adjustment member211. An outer wall of the first adjustment member211is provided with two openings, and an outer wall of the rear adjustment member21is provided with one opening. One opening of the first adjustment member211is communicated with the first pipe1through the first connecting member30, and the other opening of the first adjustment member211is communicated with the opening of the rear adjustment member21through a second connecting member40, so that the two adjustment members21are arranged in series.

In the embodiments shown inFIG.6,FIG.7,FIG.12, andFIG.13, there are three adjustment members21, the three adjustment members21are arranged spaced apart in the front-rear direction, and the front adjustment member21of the three adjustment members21is a first adjustment member211. An outer wall of the first adjustment member211is provided with two openings, an outer wall of the middle adjustment member21is provided with two openings, and an outer wall of the rear adjustment member21is provided with one opening. One opening of the first adjustment member211is communicated with the first pipe1through the first connecting member30, the other opening of the first adjustment member211is communicated with one opening of the middle adjustment member21through one second connecting member40, and the other opening of the middle adjustment member21is communicated with the opening of the rear adjustment member21through another second connecting member40, so that the three adjustment members21are arranged in series. The adjustment members21arranged in series can more flexibly adjust an amount of refrigerant in a system when a working condition changes, especially in the frequency conversion system, and can adapt to various working conditions.

It can be understood that this application is not limited to the foregoing series connection. For example, among the plurality of adjustment members21, in addition to that the opening of the first adjustment member211is communicated with the first pipe1through the first connecting member30, at least one adjustment member21of the remaining adjustment members21is communicated with the first pipe through a connecting member. In addition, every two of the plurality of adjustment members21are communicated, so as to implement a plurality of combination forms of series and parallel connections.

In some embodiments, the refrigerant adjustment component20includes a plurality of adjustment members21, and the plurality of adjustment members21each include a cavity for accommodating refrigerant and an outer wall enclosing the cavity. An outer wall of the adjustment member21has an opening for refrigerant flow. Openings of the plurality of adjustment members21are all communicated with the first pipe1through the first connecting member30, and in the direction of gravity, the opening of each adjustment member21is higher than the communication position between the first connecting member30and the first pipe1. In other words, when the heat pump system is switched from the cooling mode to the heating mode, refrigerant in the first pipe1may separately flow into the plurality of adjustment members21through the first connecting member30, and when the heat pump system is switched from the heating mode to the cooling mode, refrigerant in the plurality of adjustment members21may all fall back into the first pipe1due to gravity, so as to implement a form of parallel connection of the plurality of adjustment members21. Each adjustment member21may independently adjust a flow amount of refrigerant, which further helps refrigerant flow, thereby improving efficiency of the heat pump system.

There are a plurality of arrangement forms of the first connecting member30. For example, in some specific embodiments, there are a plurality of first connecting members30, each of the adjustment members21corresponds to one first connecting member30, and each of the adjustment members21is communicated with the first pipe1through a corresponding first connecting member30. For example, in some other specific embodiments, there is one first connecting member30, and the plurality of adjustment members21are integrally formed and are communicated with the first pipe1through the first connecting member30, as shown inFIG.15.

In some embodiments, the adjustment member21is an adjustment pipe, and a hydraulic diameter of the adjustment pipe is greater than 0.5 times of a hydraulic diameter of the first pipe1and less than 2 times of the hydraulic diameter of the first pipe1. Therefore, an amount of exchanged heat and an energy efficiency ratio in different modes are further stabilized, thereby improving efficiency of the heat pump system.

In some embodiments, a volume of the refrigerant adjustment component20is greater than 0.25 times of a volume of the first pipe1and less than 5 times of the volume of the first pipe1, so as to further stabilize an amount of exchanged heat and an energy efficiency ratio on the indoor side in different modes, thereby improving efficiency of the heat pump system.

In some embodiments, the heat exchanger10further includes fins7, and the fins7are disposed between adjacent heat exchange tubes3, to increase a heat exchange area of two adjacent heat exchange tubes3, thereby improving heat exchange efficiency of the heat exchanger10.

Specifically, when the heat exchanger10is a bent heat exchanger, the fins7are disposed between adjacent first straight sections32and between adjacent second straight sections32, and no fins7are disposed adjacent bent sections33.

The following describes, with reference toFIG.25, a heat pump system including the heat exchange apparatus according to the embodiment of this application.

The heat pump system includes a compressor100, a flow direction switching member200, a first heat exchanger300, a throttle member400, a second heat exchanger500, and a controller600. The compressor100, the first heat exchanger300, and the second heat exchanger500each include a first opening and a second opening. The first opening of the first heat exchanger300is communicated with the first opening of the compressor100through the flow direction switching member200, and the second opening of the first heat exchanger300is communicated with the first opening of the throttle member400. The first opening of the second heat exchanger500is communicated with the second opening of the throttle member400, and the second opening of the second heat exchanger500is communicated with the second opening of the compressor100through the flow direction switching member200. Specifically, adjacent apparatus in the heat pump system are communicated at least through a pipe.

When the heat pump system works, the system is filled with refrigerant, and the refrigerant may circulate in the heat pump system. Driven by the controller600, the flow direction switching member200is configured to change a flow direction of the refrigerant in the heat exchange system. In other words, under the action of the flow direction switching member200, the refrigerant may flow out from the compressor100, first pass through the first heat exchanger300and then the second heat exchanger500, and then flow back to the compressor100; or may flow out from the compressor100, first pass through the second heat exchanger500and then the first heat exchanger300, and then flow back to the compressor100.

At least one of the first heat exchanger300and the second heat exchanger500is the heat exchange apparatus according to the embodiment of this application. Therefore, the first heat exchanger300and/or the second heat exchanger500can accommodate more refrigerant, to adjust an amount of refrigerant working in a system, thereby improving system efficiency.

In the description of this specification, descriptions with reference to the term such as “an embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” mean that specific features, structures, materials, or characteristics described with reference to the embodiment or example are included in at least one embodiment or example of this application. In this specification, illustrative descriptions of the foregoing terms do not necessarily refer to a same embodiment or example. Moreover, the described specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in an appropriate manner. In addition, those skilled in the art can combine different embodiments or examples described in the specification and features of the different embodiments or examples without contradicting each other.

The terms “first”, “second”, and the like in the description of this application are merely used for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of this application, “a plurality of” means at least two, such as two or three, unless otherwise specifically defined.

In this application, unless otherwise expressly specified and defined, terms such as “install”, “connect”, “connected to”, and “fasten” should be understood in a broad sense. For example, unless otherwise expressly defined, a “connection” may be a fixed connection, may be a detachable connection, or may be an integrated connection; or may be a mechanical connection, or an electrical connection or, mutually communicative connection; or may be a direct connection, or an indirect connection through an intermediate medium; or may be an inner communication between two elements, or interaction between two elements. A person of ordinary skill in the art may understand specific meanings of the foregoing terms in this application with reference to specific circumstances.

In this application, unless otherwise expressly specified and defined, that a first feature is “above” or “below” a second feature means that the first feature and the second feature are in direct contact, or are in indirect contact through an intermediate medium. Moreover, that the first feature is “over”, “above”, or “on” the second feature may mean that the first feature is over or obliquely above the second feature, or merely mean that the first feature is higher than the second feature in terms of heights. That the first feature is “under”, “below”, “under”, or “beneath” the second feature may mean that the first feature is under or obliquely below the second feature, or merely mean that the first feature is lower than the second feature in terms of heights.

Although the embodiments of this application are shown and described above, it can be understood that the foregoing embodiments are examples and shall not be construed as a limitation on this application. A person of ordinary skill in the art may make changes, modifications, substitutions, and variants based on the foregoing embodiments within the scope of this application.