阅读说明：本技术 排水组件及具有其的燃气设备 (Water drainage assembly and gas equipment with same ) 是由 马继卿 梁国荣 陆祖安 于 2020-05-27 设计创作，主要内容包括：本发明公开了一种燃气设备的排水组件和燃气设备,燃气设备具有控制器,排水组件包括：进水管,进水管具有冷凝水入口；出水管,出水管具有冷凝水出口；水位检测器,水位检测器设置于出水管内用于检测出水管内的水位；水位检测器包括：静止件,静止件静止设于出水管内,静止件设有第一连接点；活动件,活动件设有第二连接点,活动件在第一位置和第二位置可活动地设于静止件上,在出水管内的水位达到预定值的情况,活动件位于第二位置且第一连接点与第二连接点接触,从而产生电信号。根据本发明实施例的燃气设备的排水组件,在出水管内设置水位检测器,并通过水位检测器实时监测出水管内的水位,从而避免出水管被堵塞而引发安全事故。(The invention discloses a water drainage component of gas equipment and the gas equipment, the gas equipment is provided with a controller, the water drainage component comprises: the water inlet pipe is provided with a condensed water inlet; the water outlet pipe is provided with a condensed water outlet; the water level detector is arranged in the water outlet pipe and is used for detecting the water level in the water outlet pipe; the water level detector includes: the static part is statically arranged in the water outlet pipe and is provided with a first connecting point; the movable part is provided with a second connecting point, the movable part is movably arranged on the static part at a first position and a second position, and the movable part is positioned at the second position and the first connecting point is in contact with the second connecting point under the condition that the water level in the water outlet pipe reaches a preset value, so that an electric signal is generated. According to the drainage component of the gas equipment, the water level detector is arranged in the water outlet pipe, and the water level in the water outlet pipe is monitored in real time through the water level detector, so that safety accidents caused by blockage of the water outlet pipe are avoided.)

1. A water drain assembly for a gas appliance having a controller, the water drain assembly comprising:

a water inlet pipe having a condensed water inlet;

the water outlet pipe is provided with a condensed water outlet;

the water level detector is arranged in the water outlet pipe and is used for detecting the water level in the water outlet pipe; the water level detector includes:

the static part is statically arranged in the water outlet pipe and is provided with a first connecting point;

the movable piece, the movable piece is equipped with the second tie point, the movable piece is located movably in first position and second position on the stationary part under the condition that the water level in the outlet pipe reaches the predetermined value, the movable piece is located the second position just first tie point with the second tie point contact to produce the signal of telecommunication.

2. The gas-fired facility's drainage assembly of claim 1, wherein the stationary member comprises a sealing frame, a first connection point is provided at the top of the sealing frame, the movable member comprises a movable rod, at least a portion of the movable rod extends into the sealing frame, and a second connection point is provided at the top of the movable rod.

3. The gas equipment's of claim 2, characterized in that, the movable rod is provided with first limit structure and second limit structure on the axial, wherein, the first limit structure clamps the inboard of sealing frame, the second limit structure is located the outside of sealing frame, the first limit structure and the second limit structure limit the movable rod's of range.

4. The gas-fired equipment drainage assembly according to claim 3, wherein when the movable member is located at the first position, the first limit structure is attached to the bottom plate of the sealing frame, and the second limit structure is spaced from the bottom plate of the sealing frame; when the moving part is located at the second position, the first limiting structure and the bottom plate of the sealing frame are arranged at intervals, and the second limiting structure and the bottom plate of the sealing frame are attached.

5. The gas-fired equipment's drainage subassembly of claim 2, wherein one part of the first connecting point is outside the sealing frame, another part of the first connecting point is inside the sealing frame, the sealing frame is provided with a lead wire on the top, and the lead wire is connected with another part of the first connecting point.

6. The gas-fired equipment water drainage assembly according to any one of claims 1 to 5, wherein the water inlet pipe and the water outlet pipe are two separate pipes arranged in parallel, and a communication pipe is arranged between the water inlet pipe and the water outlet pipe.

7. The gas-fired device's drainage assembly of claim 6, wherein the water outlet end of the inlet tube is located on the same side as the water inlet end of the outlet tube, the water outlet end of the inlet tube being higher than the water inlet end of the outlet tube.

8. The gas-fired device's drainage assembly of claim 6, wherein an inner tube is provided in the inlet tube, one end of the inner tube extending out of the inlet tube and the other end of the inner tube extending into the lower portion of the inlet tube.

9. The gas-fired equipment's drainage assembly of claim 6, wherein the bottom of the inlet pipe is provided with a movable plug.

10. A gas-fired appliance, comprising:

a combustion chamber;

the drain assembly of any one of claims 1-9, having a condensate inlet;

the water receiving disc is positioned at the lower side of the combustion chamber and is provided with a water outlet, a smoke return port and a smoke outlet, the water outlet is communicated with the condensed water inlet, and the smoke return port is communicated with the combustion chamber;

and the smoke pipe is communicated with the fuel gas outlet.

Technical Field

The invention relates to the technical field of gas application, in particular to a water drainage assembly of gas equipment and the gas equipment with the water drainage assembly.

Background

The condensing gas water heater is easy to condense the low-temperature flue gas discharged from the outside to form small water drops in the discharging process, so that a water receiving tray and a drainage assembly are usually required to be arranged in the machine shell, and water in the water receiving tray is guided out through the drainage assembly.

Due to the particulate matter contained in the flue gas, the problem of clogging of the outlet pipe can occur after the drainage assembly has been in use for a period of time. If the comdenstion water can't in time be discharged, can lead to the water collector overflow, influence the normal circulation of flue gas, even cause the circuit incident.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, one object of the present invention is to provide a drainage assembly for a gas appliance, which has a reasonable structural design, allows water flow to be kept smooth for a long time, and can prompt a user or stop the gas appliance in time in case of blockage.

The invention also provides gas equipment with the water drainage assembly, and the gas equipment is safe to use.

According to the water discharging assembly of the gas appliance provided with the controller, the water discharging assembly comprises: a water inlet pipe having a condensed water inlet; the water outlet pipe is provided with a condensed water outlet; the water level detector is arranged in the water outlet pipe and is used for detecting the water level in the water outlet pipe; the water level detector includes: the static part is statically arranged in the water outlet pipe and is provided with a first connecting point; the movable piece, the movable piece is equipped with the second tie point, the movable piece is located movably in first position and second position on the stationary part under the condition that the water level in the outlet pipe reaches the predetermined value, the movable piece is located the second position just first tie point with the second tie point contact to produce the signal of telecommunication.

According to the drainage component of the gas equipment, the water level detector is arranged in the water outlet pipe, and the water level in the water outlet pipe is monitored in real time through the water level detector, so that safety accidents caused by blockage of the water outlet pipe are avoided.

According to some embodiments of the invention, the stationary member comprises a sealing frame, a first connection point is arranged on the top of the sealing frame, the movable member comprises a movable rod, at least a part of the movable rod extends into the sealing frame, and a second connection point is arranged on the top of the movable rod.

In an optional embodiment, a first limit structure and a second limit structure are axially arranged on the movable rod, wherein the first limit structure is clamped on the inner side of the sealing frame, the second limit structure is located on the outer side of the sealing frame, and the movable range of the movable rod is limited by the first limit structure and the second limit structure.

In a further optional embodiment, when the movable member is located at the first position, the first limit structure is attached to the bottom plate of the sealing frame, and the second limit structure is spaced from the bottom plate of the sealing frame; when the moving part is located at the second position, the first limiting structure and the bottom plate of the sealing frame are arranged at intervals, and the second limiting structure and the bottom plate of the sealing frame are attached.

In an optional embodiment, one part of the first connection point is located outside the sealing frame, the other part of the first connection point is located inside the sealing frame, and a lead is arranged on the top of the sealing frame and connected with the other part of the first connection point.

In an optional embodiment, the water inlet pipe and the water outlet pipe are two split pipes arranged in parallel, and a communicating pipe is arranged between the water inlet pipe and the water outlet pipe.

In a further optional embodiment, the water outlet end of the water inlet pipe and the water inlet end of the water outlet pipe are located on the same side, and the water outlet end of the water inlet pipe is higher than the water inlet end of the water outlet pipe.

In some embodiments, an inner tube is disposed in the water inlet tube, one end of the inner tube extends out of the water inlet tube, and the other end of the inner tube extends into the lower portion of the water inlet tube.

In some embodiments, the bottom of the water inlet pipe is provided with a movable plug.

In some embodiments, the water outlet end of the water inlet pipe and the water inlet end of the water outlet pipe are located on the same side, and the water outlet end of the water inlet pipe is higher than the water inlet end of the water outlet pipe.

The gas equipment provided by the embodiment of the invention comprises the drainage assembly provided by the embodiment of the invention, and the drainage assembly provided by the embodiment of the invention can drain condensed water in time, and can remind a user in time or stop the gas equipment to work quickly under the condition of blockage, so that the safe use of the gas equipment is ensured, and therefore, the gas equipment provided by the embodiment of the invention is safe to use and long in service life.

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

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a gas fired appliance according to some embodiments of the present invention;

FIG. 2 is an assembled schematic view of a drain assembly, a drip tray, a flue, and a combustion chamber according to some embodiments of the invention;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a cross-sectional view of a drain assembly according to some embodiments of the present invention;

fig. 5 is a cross-sectional view of a water level detector according to some embodiments of the present invention.

Reference numerals:

a gas appliance 100; a housing 101;

a drain assembly 10; a water inlet pipe 11; a condensed water inlet 111; a water outlet end 112; a water outlet pipe 12; a condensed water outlet 121; a water inlet end 122; a communicating pipe 13; a water level detector 14; a stationary member 141; a first connection point 1411; a sealing frame 1412; a bottom panel 14121; a movable member 142; a second connection point 1421; a movable bar 1422; a first stop structure 14221; a second stop structure 14222; a lead 143; an inner tube 15; a movable stopper 16;

a controller 20;

a water pan 30; a water discharge port 31; a flue gas outlet 33;

a smoke tube 40;

a combustion chamber 50; a primary heat exchange pipe 51; a secondary heat exchange tube 52;

a gas premixing device 60.

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.

As shown in fig. 1 in combination with fig. 2 to 3, a gas appliance 100 according to an embodiment of the present invention includes a casing 101, and a gas premixing device 60, a combustion chamber 50 and a water pan 30 are sequentially disposed in the casing 101 from top to bottom, wherein at least two stages of heat exchange pipes are disposed in the combustion chamber 50, and in some examples, as shown in fig. 3, a first stage heat exchange pipe 51 and a second stage heat exchange pipe 52 are disposed in the combustion chamber 50. By providing the multistage heat exchange pipes in the combustion chamber 50, heat of the flue gas can be sufficiently absorbed, thereby improving the heat exchange efficiency of the gas appliance 100.

It can be understood that the heat exchange efficiency of the gas combustion apparatus 100 can be further improved by arranging the heat exchange pipes according to the flue gas temperature of different areas of the combustion chamber 50, and in some alternative examples, the first-stage heat exchange pipes 51 are provided at the left and right sides and the middle of the combustion chamber 50, and the second-stage heat exchange pipes 52 are provided at the lower part of the combustion chamber 50 and partially surrounded by the first-stage heat exchange pipes 51. As shown in fig. 3, the combustion chamber 50 has a combustion region in the middle of the upper portion thereof, in which the flue gas temperature is high, and primary heat exchange pipes 51 at the left and right sides of the upper portion extend downward from the upper portion thereof to transfer the temperature to secondary heat exchange pipes 52 at the lower portion of the combustion chamber 50. Thereby, the temperature rise of the primary heat exchange pipe 51 and the secondary heat exchange pipe 52 can be reduced.

Further alternatively, the pipe diameter of the first-stage heat exchange pipe 51 is larger than that of the second-stage heat exchange pipe 52, that is, the unit flow area of the first-stage heat exchange pipe 51 is larger than that of the second-stage heat exchange pipe 52. The flue gas temperature at the upper part and the middle part of the combustion chamber 50 is higher, and water in the first-stage heat exchange pipe 51 can be quickly heated. The flue gas temperature at the lower part of the combustion chamber 50 is lower, the pipe diameter of the secondary heat exchange pipe 52 is smaller, the heat exchange area can be increased integrally, and therefore the heating speed of water in the secondary heat exchange pipe 52 is increased.

After the heat of the flue gas in the combustion chamber 50 is absorbed by the multi-stage heat exchange tubes, the temperature of the flue gas is low, the flue gas is easy to produce condensed water in the discharging process, and the condensed water needs to be discharged in time in order to avoid safety accidents caused by excessive condensed water accumulated in the flue.

In some embodiments of the present invention, as shown in fig. 1 and 2, a water receiving tray 30 is provided on the lower side of the combustion chamber 50, and a drain assembly 10 is provided on the water receiving tray 30. The water receiving tray 30 has a water outlet 31, a smoke return port (not shown) and a smoke outlet 33, wherein the water outlet 31 is communicated with the condensed water inlet 111, and the smoke return port is communicated with the combustion chamber 50.

When the gas equipment 100 works, the smoke flowing out of the combustion chamber 50 flows downwards to enter the water receiving tray 30 and flows into the smoke pipe 40 through the water receiving tray 30, and the smoke can further heat the heat exchange pipe along the way after entering the smoke pipe 40, so that the heat exchange pipe can absorb the heat in the smoke again, the heat exchange efficiency of the gas equipment 100 is improved, and the energy efficiency of the gas equipment 100 is further improved. Because the temperature of the flue gas is further reduced, most of the water vapor is condensed to form condensed water, and the condensed water flows into the water pan 30 to realize water-vapor separation.

That is, the water receiving tray 30 not only can guide out the smoke, but also can collect water drops falling from the smoke pipe 40. Because the water pan 30 is located at the lower side of the combustion chamber 50, the water pan 30 blocks the downward flow of the flue gas and isolates the combustion chamber 50 from the outside, thereby preventing the heat from entering the area where the electronic device is located and improving the circuit safety of the gas equipment 100.

Optionally, as shown in fig. 2, the width of the water-receiving tray 30 in the horizontal direction is greater than that of the combustion chamber 50, so that the isolation effect of the water-receiving tray 30 is further improved, and heat in the combustion chamber 50 is prevented from being diffused downwards.

The drain assembly 10 of the gas appliance 100 according to the embodiment of the present invention will be described in detail with reference to fig. 1 to 5.

As shown in fig. 4, the drain assembly 10 includes an inlet pipe 11, an outlet pipe 12, and a water level detector 14.

Specifically, the inlet pipe 11 has a condensed water inlet 111, the condensed water inlet 111 is connected to the drain opening 31 of the drip tray 30, and the outlet pipe 12 has a condensed water outlet 121. The water inlet pipe 11 and the water outlet pipe 12 may be a single piece, that is, the water inlet pipe 11 is located at the upstream of the drainage assembly 10, the water outlet pipe 12 is located at the downstream of the drainage assembly 10, and the water inlet pipe 11 and the water outlet pipe 12 are connected in series through a water path.

Alternatively, the inlet pipe 11 and the outlet pipe 12 are two separate pipes arranged in parallel, and a communication pipe 13 is arranged at the outlet end 112 of the inlet pipe 11 and the inlet end 122 of the outlet pipe 12, so that the condensed water in the inlet pipe 11 is introduced into the outlet pipe 12 through the communication pipe 13. Thus, the condensed water in the water receiving tray 30 enters the water inlet pipe 11 in advance, and then is conveyed to the water outlet pipe 12 through the communication pipe 13 to be discharged. That is, after the condensed water is injected into the inlet pipe 11, the condensed water flows into the outlet pipe 12. In this way, solid particles in the condensed water can be precipitated at the bottom end of the water inlet pipe 11, i.e. the solid particles entering the water outlet pipe 12 are reduced, and the possibility of blockage of the water outlet pipe 12 is reduced.

A water level detector 14 is provided in the water outlet pipe 12, and the water level detector 14 is used for detecting the water level in the water pipe 12. Wherein the controller 20 is connected to the water level detector 14, and in case the water level in the water outlet pipe 12 reaches a predetermined value, the controller 20 receives the electric control signal sent by the water level detector 14 to remind the user, or shuts down the gas appliance 100, for example, by sending out an alarm sound or a warning light to remind the user. That is, in the case that the water outlet pipe 12 cannot be smoothly conducted, the water level detector 14 may send an electric signal to the controller 20 to remind a user through the controller 20 or directly stop the operation of the gas appliance 100. Thus, further generation of condensed water can be reduced, and safety accidents are avoided.

The water level detector 14 includes: stationary member 141 and movable member 142. As shown in fig. 4 and fig. 5, the stationary member 141 is disposed in the outlet pipe 12, and the stationary member 141 is provided with a first connection point 1411. I.e. the stationary member 141 is fixed in position relative to the interior of the outlet pipe 12.

The movable member 142 has a second connection point 1421, the movable member 142 is movably disposed in the water outlet pipe 12 at a first position and a second position, and when the water level in the water outlet pipe 12 reaches a predetermined value, the movable member 142 is located at the second position and the first connection point 1411 is matched with the second connection point 1421, so as to generate an electrical signal. In other words, the water level of the water outlet pipe 12 affects the position of the movable element 142 relative to the stationary element 141, that is, the buoyancy of the water outlet pipe 12 can change the positional relationship between the movable element 142 and the stationary element 141, and when the movable element 142 is located at the first position, the second connection point 1421 of the movable element 142 is not in contact with the first connection point 1411 of the stationary element 141, that is, the water level detector 14 does not generate an electrical signal; in the case that the movable member 142 is close to the stationary member 141 and located at the second position under the influence of the buoyancy, the second connection point 1421 of the movable member 142 is in contact with the first connection point 1411 of the stationary member 141, that is, the water level detector 14 generates an electric signal.

That is to say, whether contact through moving part 142 and stationary part 141 reflects whether the jam problem appears in outlet pipe 12, and then in time reminds the user or shuts down gas equipment 100, avoids the comdenstion water further to prevent effectively that gas equipment 100 from appearing the overflow problem.

In brief, according to the water discharge assembly 10 of the gas appliance 100 of the embodiment of the present invention, the water level detector 14 is disposed in the water outlet pipe 12, and the water level in the water outlet pipe 12 is monitored in real time by the water level detector 14, so as to prevent the water outlet pipe 12 from being blocked to cause a safety accident.

In a further alternative embodiment, as shown in fig. 5, the stationary member 141 includes a sealing frame 1412, a first connection point 1411 is disposed on a top of the sealing frame 1412, the movable member 142 includes a movable rod 1422, at least a portion of the movable rod 1422 extends into the sealing frame 1412, and a second connection point 1421 is disposed on a top of the movable rod 1422. That is, a relatively closed space is provided by the sealing frame 1412, so that the contact point of the first connection point 1411 and the second connection point 1421 is located in the sealing frame 1412, thereby preventing the condensed water in the water outlet pipe 12 from affecting the contact between the first connection point 1411 and the second connection point 1421, and improving the detection accuracy of the water level detector 14.

In some alternative embodiments of the present invention, a first limit structure 14221 and a second limit structure 14222 are axially disposed on the movable rod 1422, wherein the first limit structure 14221 is clamped inside the sealing frame 1412, the second limit structure 14222 is located outside the sealing frame 1412, and the movable range of the movable rod 1422 is limited by the first limit structure 14221 and the second limit structure 14222.

As shown in fig. 5, the first position-limiting structure 14221 is located at a first height above the movable bar 1422, the second position-limiting structure 14222 is located at a second height above the movable bar 1422, and the movable range of the movable bar 1422 is adjusted by the height difference between the first position-limiting structure 14221 and the second position-limiting structure 14222. In the case that the depth of the water outlet pipe 12 is large, the height difference between the first limiting structure 14221 and the second limiting structure 14222 may be set to be large, that is, the predetermined water level of the water outlet pipe 12 is large; in the case that the depth of the water outlet pipe 12 is small, the height difference between the first limiting structure 14221 and the second limiting structure 14222 can be set to be small, that is, the predetermined water level of the water outlet pipe 12 is small.

The size of the first stopper 14221 is larger than the hole position formed by the bottom panel 14121 of the sealing frame 1412, that is, the first stopper 14221 is confined within the sealing frame 1412.

Optionally, when the movable element 142 is located at the first position, the first limiting structure 14221 is disposed in close contact with the bottom plate 14121 of the sealing frame 1412, and the second limiting structure 14222 is disposed at an interval from the bottom plate 14121 of the sealing frame 1412; when the movable element 142 is located at the second position, the first position-limiting structure 14221 is spaced apart from the bottom plate 14121 of the sealing frame 1412, and the second position-limiting structure 14222 is attached to the bottom plate 14121 of the sealing frame 1412. That is, in the case that the water level in the water outlet pipe 12 does not reach the predetermined water level, the movable member 1422 is suspended on the sealing frame 1412 through the first limiting structure 14221; when the water level in the water outlet pipe 12 reaches a predetermined level, the buoyancy acting on the second limit structure 14222 pushes the movable member 1422 to displace toward the first connection point 1411 until the second limit structure 14222 stops against the bottom plate 14121 of the sealing frame 1412.

Optionally, one part of the first connection point 1411 is located outside the sealing frame 1412, the other part of the first connection point 1411 is located inside the sealing frame 1412, the top of the sealing frame 1412 is provided with the lead 143, and the lead 143 is connected with the other part of the first connection point 1411. Wherein, the lead 143 is connected with the first connection point 1411 and penetrates out of the wall thickness of the water outlet pipe 12 or the communication pipe 13. The lead 143 is connected to the controller 20, and an electrical signal generated by touching the first connection point 1411 and the second connection point 1421 is transmitted to the controller 20 through the lead 143.

In a further alternative example, the top surface of the sealing frame 1412 is higher than the highest water level of the water outlet pipe 12. Thus, the lead 143 can be prevented from being immersed in water, and the service life of the water level detector 14 can be prolonged.

In some examples, stationary member 141 and movable member 142 are both made of a waterproof material. Thus, both the stationary member 141 and the movable member 142 may be immersed in water for a long period of time to prevent the water level detector 14 from failing. In addition, movable member 142 may be selected from a material having a relatively low specific gravity, for example, movable member 142 may be constructed at least partially of a foam material.

In other alternative embodiments of the invention, as shown in figure 2, the bottom of the inlet pipe 11 is provided with a movable plug 16. In the case that the outlet pipe 12 is blocked, the residual water in the inlet pipe 11 can be emptied by opening the movable plug 16, so that the water in the inlet pipe 11 is prevented from being stored for too long and breeding bacteria.

In other alternative embodiments of the present invention, the water outlet end of the water inlet pipe 11 is located on the same side as the water inlet end of the water outlet pipe 12, and the water outlet end of the water inlet pipe 11 is higher than the water inlet end of the water outlet pipe 12. In this way, solid particles in the condensed water can be precipitated at the bottom end of the water inlet pipe 11, i.e. the solid particles entering the water outlet pipe 12 are reduced, and the possibility of blockage of the water outlet pipe 12 is reduced.

In an alternative example, as shown in fig. 4, an inner pipe 15 is provided in the inlet pipe 11, one end (e.g., an upper end in fig. 4) of the inner pipe 15 extends out of the inlet pipe 11, and the other end (e.g., a lower end in fig. 4) of the inner pipe 15 extends into a lower portion of the inlet pipe 11. The upper end of the inner pipe 15 is connected with the water pan 30, and the outlet at the lower end of the inner pipe 15 is located at the lower part of the water inlet pipe 11, so that the condensed water can directly flow into the bottom of the water inlet pipe 11, and thus, the air in the water inlet pipe 11 can be discharged by means of the condensed water at the beginning of the use of the drainage assembly 10.

The gas equipment 100 according to the embodiment of the invention comprises the drainage assembly 10 according to the embodiment, and the drainage assembly 10 according to the embodiment of the invention can drain condensed water in time, and can quickly stop the gas equipment 100 to ensure the safe use of the gas equipment 100 when blockage occurs, so that the gas equipment 100 according to the embodiment of the invention is safe to use and has long service life.

In the description of the present invention, it is to be understood that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, 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, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected 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," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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.