Drainage device and water heater comprising same

Abstract

The application discloses a kind of water discharge device and contain its water heater, the water discharge device includes valve body, valve core component and drainage component, water inlet and water outlet are provided on valve body and are communicated with each other, the communication between water inlet and water outlet is opened or blocked by moving valve core component, valve body is provided with drainage passage including water inlet, and drainage component is opened or blocked by moving drainage passage;Drainage component and valve core component are linked with each other, wherein, in the process that drainage component is moved to open drainage passage, valve core component is driven to block the communication between water inlet and water outlet.When water in water inlet pipe needs to be discharged, drainage component moves and opens drainage passage to drain, in the process that drainage component is moved to open drainage passage, valve core component gradually blocks the communication between water inlet and water outlet, to achieve the linkage control of drainage and water inlet, prevent continuous water inlet during drainage and reduce efficiency.

Description

Technical Field

[0001] This invention relates to the field of water heater technology, and more specifically to a drainage device and a water heater containing the same. Background Technology

[0002] A water heater is a device that uses various physical principles to raise the temperature of cold water to produce hot water within a certain time. Taking a gas water heater as an example, the inlet pipe delivers cold water to a heat exchanger, where gas combustion heats the water. The hot water is then delivered to the user through the outlet pipe. In some special cases, such as when the user is not going to use the water heater for a long time or when it needs to be cleaned, the water inside the water heater needs to be drained. Therefore, a water inlet pipe is usually installed near the outlet of the water heater to drain the water. However, in practice, additional tools are required to extract the water from the water inlet pipe, which is cumbersome and reduces the user experience.

[0003] Chinese patent application CN216306788U discloses an antifreeze valve and a water heater using the antifreeze valve. The antifreeze valve can also be installed on the pipe to realize the function of water inlet or drainage. However, the outlet of the antifreeze valve in the normal state and the inlet in the drainage state are located in the same position, which means that the water inlet must be closed before drainage can be carried out during the use of the antifreeze valve, which is more troublesome and cannot realize the linkage control of water inlet and drainage. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect that the drainage device in the prior art cannot realize the linkage control of water inlet and drainage, and to provide a drainage device and a water heater including the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A drainage device includes a valve body and a valve core component. The valve body has an inlet and an outlet that are interconnected. The valve core component moves to open or close the connection between the inlet and the outlet. The device further includes a drainage component. The valve body has a drainage channel including an inlet. The drainage component moves to open or close the drainage channel. The drainage component and the valve core component are linked together. During the process of opening the drainage channel, the drainage component causes the valve core component to close the connection between the inlet and the outlet.

[0007] In this design, under normal use of the water heater, the drain component is in a blocked drain channel state, while the valve core component is in a state where the inlet and outlet are open, allowing water to flow normally from the inlet to the outlet. When it is necessary to drain water from the inlet pipe, the drain component moves and opens the drain channel to drain water at the inlet. As the drain component moves to open the drain channel, the valve core component gradually blocks the connection between the inlet and outlet, achieving coordinated control of drainage and water inflow to prevent continuous water inflow during drainage and reduce drainage efficiency.

[0008] Furthermore, the valve core component abuts against the drainage component, and changes its abutment position as the drainage component moves, so as to realize that the valve core component itself moves and blocks the connection between the inlet and the outlet.

[0009] In this solution, with this configuration, as the drainage component moves to open the drainage channel, the valve core component can abut against different positions of the drainage component, thereby causing the valve core component to move and block the connection between the inlet and outlet, making the linkage between the drainage component and the valve core component simpler and more reliable.

[0010] Furthermore, the drainage component also includes a guide portion, and the valve core component abuts against the guide surface of the guide portion. The size of the guide surface along the movement path of the valve core component changes as it moves.

[0011] In this solution, when the valve core component moves by itself and blocks the connection between the inlet and outlet, the drainage component is provided with a guide in the direction of the valve core component's movement. By utilizing the change in the size of the guide surface of the guide, the contact position between the valve core component and the drainage component is changed, making the structure simpler.

[0012] Furthermore, the guide portion is a frustum structure, the guide surface is the outer surface of the frustum structure, and the axis of the valve core component is perpendicular to the axis of the guide portion.

[0013] In this design, the valve core component directly and vertically abuts against the outer surface of the frustum structure, making the linkage between the drainage component and the valve core component smoother. It also promotes that the movement directions of the drainage component and the valve core component are perpendicular to each other, making the internal layout of the drainage device more reasonable.

[0014] Furthermore, the drainage device also includes a first elastic element, the two ends of which abut against the valve core component and the valve body respectively, so as to drive the valve core component to abut against the drainage component.

[0015] In this solution, the first elastic element provides a driving force for the valve core component to abut against the drainage component, thereby better realizing the linkage between the valve core component and the drainage component.

[0016] Furthermore, a closed communicating cavity is formed between the drainage component and the valve body, and the drainage component achieves communication between the communicating cavity and the drainage channel during movement; the drainage component has a communicating channel, one end of the communicating channel is connected to the communicating cavity, and the other end of the communicating channel leads to the external space.

[0017] In this solution, with this configuration, when the drainage component moves and opens the drainage channel to drain water at the inlet, the water discharged from the inlet will first enter the connecting cavity, and then be discharged to the external space through the connecting channel on the drainage component. This ensures that the drainage component will not detach from the valve body when the drainage channel is opened, avoiding the need to reinstall the drainage component after drainage, which would be troublesome.

[0018] Furthermore, the drainage component includes a body structure and a threaded portion, the threaded portion extending outward in the radial direction of the body structure, the threaded portion being threadedly connected to the valve body, and the threaded portion, the body structure, and the valve body forming the communicating cavity.

[0019] In this solution, the threaded part of the drain component is connected to the valve body, making it easier to move the drain component relative to the valve body. During the movement and drainage process, the threaded part can always be connected to the valve body, preventing the drain component from separating from the valve body.

[0020] Furthermore, the valve body has an air inlet between the water inlet and the water outlet; the drainage device also includes an air inlet valve, which abuts against the drainage component and can be disengaged from the drainage component as the drainage component moves, so that the air inlet valve opens the air inlet.

[0021] In this design, the air inlet valve can detach from the drain component during its movement, thus opening the air inlet. The negative pressure inside the air inlet channel causes external air to enter the air inlet channel through the air inlet, prompting the water in the water heater to be discharged from the drain outlet more quickly and thoroughly.

[0022] Furthermore, one end of the drainage component is provided with an abutment portion, and the air intake valve abuts against the drainage component through the abutment portion, and the gap between the abutment portion and the valve body forms the drainage channel.

[0023] In this solution, by using the abutment part at one end of the drainage component to limit the air intake valve, the main body structure of the drainage component can open the drainage channel during the movement of the drainage component, while the abutment part of the drainage component disengages from the air intake valve, realizing the linkage between drainage and air intake, and more effectively promoting drainage.

[0024] Furthermore, the drainage device also includes a second elastic element, the two ends of which abut against the air inlet valve and the valve body respectively, so as to drive the air inlet valve to abut against the drainage component.

[0025] In this design, the second elastic element provides a driving force for the intake valve to abut against the drainage component. When the intake valve disengages from the drainage component, the second elastic element can also better facilitate the intake valve to open the intake port.

[0026] Furthermore, the drainage component includes a body structure and a threaded portion, the threaded portion extending outward in the radial direction of the body structure, and the threaded portion being threadedly connected to the valve body.

[0027] In this solution, by using this configuration, the threaded part of the drain component is connected to the threaded part of the valve body, which can better enable the drain component to move within the valve body and ensure the stability of the movement.

[0028] Furthermore, one end of the drainage component is provided with an abutment portion, and the gap between the abutment portion and the valve body forms the drainage channel. A closed communicating cavity is formed between the drainage component and the valve body. The drainage component has a communicating channel, one end of which connects to the communicating cavity, and the other end of which leads to the external space. The drainage device also includes an air inlet valve. The valve body has an air inlet between the water inlet and the water outlet, and the air inlet valve abuts against the abutment portion. During the movement of the drainage component, the communicating cavity and the drainage channel gradually connect, and the air inlet valve gradually disengages from the abutment portion to open the air inlet.

[0029] In this design, the gap between the contact part and the valve body forms a drainage channel. Water entering the valve body from the water inlet pipe first enters the drainage channel. When the drainage component moves, the drainage channel gradually connects with the connecting cavity. Water in the drainage channel enters the connecting cavity and is discharged from the connecting channel on the drainage component. At the same time as the drainage channel connects with the connecting cavity, the air inlet valve disengages from the contact part and opens the air inlet. External air enters through the air inlet, further promoting drainage.

[0030] A water heater is characterized in that it comprises: a water heater body; and a drainage device as described above, wherein the outlet of the drainage device is connected to the inlet pipe of the water heater body, and the outlet of the drainage device is connected to the outlet pipe of the water heater body.

[0031] In this solution, the drainage device can be connected to both the water inlet pipe and the water outlet pipe of the water heater body to control the water inlet and drainage of the water heater body, thereby achieving linkage control of water inlet and drainage.

[0032] The positive and progressive effects of this invention are as follows:

[0033] Under normal use, the water heater's drain component is in a blocked drain channel state, while the valve core component is in a state where the inlet and outlet are open, allowing water to flow normally from the inlet to the outlet. When it is necessary to drain water from the inlet pipe, the drain component moves and opens the drain channel, allowing water to drain from the inlet. As the drain component moves to open the drain channel, the valve core component gradually blocks the connection between the inlet and outlet, achieving coordinated control of drainage and water inflow to prevent continuous water intake during drainage and reduce drainage efficiency. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure and connection of the water heater in Embodiment 1 of the present invention.

[0035] Figure 2 This is a schematic cross-sectional view of the overall structure of the drainage device in Embodiment 1 of the present invention.

[0036] Figure 3 This is a schematic cross-sectional view of the valve body in Embodiment 1 of the present invention.

[0037] Figure 4 This is a cross-sectional structural diagram of the drainage component in Embodiment 1 of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] Water heater 1

[0040] Drainage device 10

[0041] Water inlet pipe 20

[0042] 30 water outlet pipe

[0043] Water pipe 40

[0044] Heat exchanger 50

[0045] Valve body 100

[0046] Inlet 110

[0047] 120 water outlet

[0048] 130 air intake

[0049] Water intake 140

[0050] Drainage channel 150

[0051] 160 connecting holes

[0052] Drainage components 200

[0053] Guidance Department 210

[0054] Guide surface 211

[0055] Connecting Channel 220

[0056] Body structure 230

[0057] Threaded part 240

[0058] Butt part 250

[0059] Valve core component 300

[0060] First abutment plate 310

[0061] 320 baffle

[0062] First elastic element 400

[0063] Second elastic element 500

[0064] Connecting cavity 600

[0065] Intake valve 700 Detailed Implementation

[0066] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of 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 this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0069] Example 1

[0070] This embodiment discloses a drainage device 10 and a water heater 1 including the drainage device 10, such as Figure 1 As shown, the water heater 1 includes a water heater body and a drainage device 10. The water heater body includes an inlet pipe 20, an outlet pipe 30, a water inlet pipe 40, and a heat exchanger 50. The inlet pipe 20 delivers cold water to the heat exchanger 50, where gas combustion heats the water in the heat exchanger 50, and then the water is delivered to the user through the outlet pipe 30. The drainage device 10 is connected to the inlet pipe 20 and the water inlet pipe 40.

[0071] like Figure 2 , Figure 3 and Figure 4As shown, the drainage device 10 includes a valve body 100, a valve core component 300, and a drainage component 200. The valve body 100 is provided with an inlet 110 and an outlet 120 that are interconnected. The valve core component 300 moves to open or close the connection between the inlet 110 and the outlet 120. The valve body 100 is provided with a drainage channel 150 including a water inlet 140. The drainage component 200 moves to open or close the drainage channel 150. The drainage component 200 and the valve core component 300 are linked together. When the drainage component 200 moves to open the drainage channel 150, it drives the valve core component 300 to close the connection between the inlet 110 and the outlet 120. With this configuration, under normal use, the drain component 200 of the water heater 1 is in a state of blocking the drain channel 150, while the valve core component 300 is in a state of opening the connection between the inlet 110 and the outlet 120. Water flows normally from the inlet 110 and out of the outlet 120. When it is necessary to drain water from the water heater 1, the drain component 200 moves and opens the drain channel 150 to drain water at the inlet 140. As the drain component 200 moves to open the drain channel 150, the valve core component 300 gradually blocks the connection between the inlet 110 and the outlet 120, achieving coordinated control of drainage and water inflow, preventing continuous water inflow during drainage and reducing drainage efficiency.

[0072] Specifically, the interior of the valve body 100 is divided into two spaces: an inlet space and a drain space. The valve body 100 has an inlet 110 and an outlet 120 connected to the water inlet space. The outlet 120 is connected to the water inlet pipe 20 of the water heater body. Water flows through the inlet 110 into the water inlet space and then through the outlet 120 into the water inlet pipe 20 of the water heater body. A connecting hole 160 is provided between the water inlet space and the drain space. A valve core component 300 is installed in the water inlet space inside the valve body 100. One end of the valve core component 300 passes through the connecting hole 160 and can move relative to the connecting hole 160. During the movement of the valve core component 300 relative to the connecting hole 160, it ensures a seal with the connecting hole 160. At the same time, during the movement of the valve core component 300 relative to the connecting hole 160, the other end of the valve core component 300 away from the connecting hole 160 can also block the inlet 110 on the valve body 100, that is, block the connection between the inlet 110 and the outlet 120 to prevent water from entering. The drainage space includes a drainage channel 150 with a water inlet 140. The water inlet 140 is connected to the water inlet pipe 40 of the water heater body. Water discharged from the water inlet pipe 40 of the water heater body flows to the external space through the drainage channel 150. A drainage component 200 is installed inside the drainage channel 150. When drainage is not needed, the drainage component 200 remains inside the drainage channel 150 and blocks the drainage channel 150. When drainage is needed, the drainage component 200 can move relative to the drainage channel 150. During the movement, the drainage component 200 gradually detaches from the drainage channel 150, thereby connecting the drainage channel 150 with the external space, and the water in the water inlet pipe 40 of the water heater body can be discharged smoothly.

[0073] Furthermore, one end of the valve core component 300 passes through the connecting hole 160 and abuts against the drain component 200. The abutment position changes as the drain component 200 moves, thereby enabling the valve core component 300 to move itself and block the connection between the inlet 110 and the outlet 120. With this arrangement, as the drain component 200 moves to open the drain channel 150, the valve core component 300 can abut against different positions on the drain component 200, thus enabling the valve core component 300 to move itself and block the connection between the inlet 110 and the outlet 120. This makes the linkage between the drain component 200 and the valve core component 300 simpler and more reliable.

[0074] like Figure 2 and Figure 4As shown, in this embodiment, a guide portion 210 is provided on the drainage component 200. The guide portion 210 has a frustum structure, and the outer surface of the frustum structure is the guide surface 211. The axis of the valve core component 300 is perpendicular to the axis of the guide portion 210. The valve core component 300 directly and perpendicularly abuts against the outer surface of the frustum structure. When the drainage component 200 moves within the drainage channel 150, the guide portion 210 also moves accordingly. During the movement of the guide portion 210, one end of the valve core component 300 passes through the connecting hole 160 and abuts against the outer surface of the guide portion 210, i.e., the outer surface of the frustum structure. This makes the moving directions of the valve core component 300 and the drainage component 200 perpendicular to each other, making the internal layout of the drainage device 10 more reasonable. Furthermore, by using the outer surface of the frustum structure as the guide surface 211 to abut against the valve core component 300, the linkage between the drainage component 200 and the valve core component 300 can be made smoother.

[0075] Of course, in other embodiments, any other method existing in the prior art can be used to achieve the change in position of one end of the valve core component 300 abutting against the drain component 200 when the drain component 200 moves, thereby driving the valve core component 300 to move and block the water inlet 110. It is only necessary to satisfy that one end of the valve core component 300 abuts against the guide surface 211 of the drain component 200, and the size of the guide surface 211 on the moving path of the valve core component 300 changes with its own movement.

[0076] Furthermore, the drainage device 10 also includes a first elastic member 400, the two ends of which abut against the valve core component 300 and the valve body 100 respectively, to drive the valve core component 300 to abut against the drainage component 200. Figure 2As shown, the valve core component 300 is disposed in the water inlet space of the valve body 100. A first abutment plate 310 is disposed in the middle of the valve core component 300 along its axial direction. One end of the first elastic member 400 abuts against the first abutment plate 310, and the other end abuts against the valve body 100. The valve core component 300 extends out of the valve body 100 at one end away from the drain component 200, and a baffle plate 320 is provided at the extended end. When one end of the valve core component 300 passes through the connecting hole 160 and abuts against the drain component 200, the first elastic element 400 is compressed, and the baffle plate 320 moves away from the inlet 110. Water flows normally through the inlet 110 into the interior of the valve body 100. When the drain component 200 moves, the elastic force of the first elastic element 400 allows the valve core component 300 to always abut against the drain component 200. When the position of the valve core component 300 abutting against the drain component 200 changes, the valve core component 300 itself also moves, and the baffle plate 320 gradually moves closer to the inlet 110, thereby blocking the inlet 110 and preventing water from flowing into the interior of the valve body 100 through the inlet 110. In this embodiment, the first elastic element 400 is a compression spring. In other embodiments, the first elastic element 400 may also be any elastic element existing in the prior art.

[0077] Furthermore, a closed communicating cavity 600 is formed between the drainage component 200 and the valve body 100. During movement, the drainage component 200 connects the communicating cavity 600 with the drainage channel 150. A communicating channel 220 is provided on the drainage component 200, with one end connected to the communicating cavity 600 and the other end leading to the external space. With this arrangement, when the drainage component 200 moves and opens the drainage channel 150 to drain water at the inlet 140, the water discharged from the inlet 140 first enters the communicating cavity 600 and then flows through the communicating channel 220 on the drainage component 200 to the external space. This prevents the drainage component 200 from detaching from the valve body 100 when the drainage channel 150 is opened, avoiding the need for reinstallation of the drainage component 200 after drainage, which would be cumbersome.

[0078] Specifically, such as Figure 2 , Figure 3 and Figure 4As shown, the drainage component 200 includes a body structure 230 and a threaded portion 240. The body structure 230 is disposed within the drainage channel 150 and moves relative to the drainage channel 150 to open the drainage channel 150. The threaded portion 240 extends radially outward on the body structure 230, and a threaded structure is provided on the periphery of the threaded portion 240. A threaded structure is also provided inside the valve body 100. The threaded portion 240 and the valve body 100 are interconnected by threads. When the body structure 230 remains inside the drainage channel 150 and blocks the drainage channel 150, the threaded portion 240, the body structure 230, and the valve body 100 together form a communicating cavity 600. With this configuration, the threaded portion 240 of the drain component 200 is connected to the valve body 100, making it easier for the drain component 200 to move relative to the valve body 100. During the movement and drainage process, the threaded portion 240 and the valve body 100 can always be connected to the valve body 100, preventing the drain component 200 from separating from the valve body 100.

[0079] It should be noted that in this embodiment, by providing a connecting channel 220 on the drainage component 200, one end of the connecting channel 220 connects to the connecting cavity 600, and the other end opens to the external space. When the drainage device 10 drains water, the drainage component 200 does not need to be detached from the valve body 100 to achieve the purpose of drainage. However, in other embodiments, when the drainage component 200 is not provided with a connecting channel 220, a threaded portion 240 can be provided on the main body structure 230 of the drainage component 200. The threaded portion 240 only serves as a connecting component to connect the drainage component 200 and the valve body 100. When drainage is needed, the drainage component 200 is screwed off from the valve body 100, thereby opening the drainage channel 150. Alternatively, a channel can be provided in other parts of the valve body 100 to connect with the drainage channel 150 to further achieve the purpose of drainage.

[0080] Furthermore, the valve body 100 also has an air inlet 130 between the water inlet 110 and the water outlet 120. The drainage device 10 also includes an air inlet valve 700, which abuts against the drainage component 200 and can detach from the drainage component 200 as the drainage component 200 moves, so that the air inlet valve 700 opens the air inlet 130. With this arrangement, during the movement of the drainage component 200, the air inlet valve 700 can detach from the drainage component 200, break free from the limitation of the drainage component 200, and thus open the air inlet 130. Because the negative pressure inside the air intake channel causes external air to enter the air intake channel through the air inlet 130, it causes the water in the water heater 1 to be discharged from the drain outlet more quickly and thoroughly.

[0081] Specifically, such as Figure 2 and Figure 3As shown, an air inlet 130 is provided in the valve body 100 between the inlet 110 and the outlet 120, i.e., in the water inlet space of the valve body 100. This air inlet 130 communicates with the external space. One end of the air inlet valve 700 passes through the valve body 100 and abuts against the drain component 200, while the other end abuts against the air inlet 130. When the drain component 200 remains inside the drain channel 150 and blocks the drain channel 150, the drain component 200 limits the air inlet valve 700, allowing the air inlet valve 700 to block the air inlet 130. At this time, external air will not enter the interior of the valve body 100 from the air inlet 130. When the drain component 200 moves and gradually opens the drain channel 150, the drain component 200 gradually disengages from the air inlet valve 700, causing the air inlet valve 700 to open the air inlet 130, allowing external air to enter the interior of the valve body 100.

[0082] Furthermore, such as Figure 4 As shown, a contact portion 250 is provided at one end of the drainage component 200. The air intake valve 700 abuts against the drainage component 200 through the contact portion 250. The radial dimension of the contact portion 250 is smaller than the radial dimension of the main body structure 230. Therefore, when the main body structure 230 is inside the drainage channel 150 and blocks the drainage channel 150, a gap will be formed between the contact portion 250 and the valve body 100. This gap is part of the drainage channel 150. With this arrangement, during the movement of the drainage component 200, the main body structure 230 of the drainage component 200 can open the drainage channel 150, while the contact portion 250 of the drainage component 200 disengages from the air intake valve 700, realizing the linkage between drainage and air intake, and more effectively promoting drainage.

[0083] Furthermore, the drainage device 10 also includes a second elastic member 500, the two ends of which abut against the air intake valve 700 and the valve body 100 respectively, to drive the air intake valve 700 to abut against the drainage component 200. Specifically, as shown... Figure 2 As shown, the intake valve 700 is disposed in the external space. One end of the intake valve 700 passes through the valve body 100 and abuts against the abutment portion 250, while the other end abuts against the air inlet 130. Simultaneously, a second abutment plate is provided at the middle of the intake valve 700 along its axial direction. The two ends of the second elastic member 500 abut against the second abutment plate and the valve body 100, respectively. When one end of the intake valve 700 abuts against the abutment portion 250, the second elastic member 500 is compressed. When one end of the intake valve 700 disengages from the abutment portion 250, the elastic force of the second elastic member 500 causes the other end of the intake valve 700 to disengage from the air inlet 130, thus opening the air inlet 130 and allowing external air to enter the interior of the valve body 100. In this embodiment, the second elastic member 500 is also a compression spring. In other embodiments, the second elastic member 500 can also be any elastic element existing in the prior art.

[0084] The water heater 1 disclosed in this embodiment includes a drainage device 10 as described above. The outlet 120 of the drainage device 10 is connected to the inlet pipe 20 of the water heater body, and the inlet 140 of the drainage device 10 is connected to the inlet pipe 40 of the water heater body. With this arrangement, the drainage device 10 can be connected to both the inlet pipe 20 and the inlet pipe 40 of the water heater body simultaneously to control the water inlet and drainage of the water heater body, thereby realizing the linkage control of water inlet and drainage.

[0085] The following is a general overview of the working process of the drainage device 10:

[0086] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, under normal use of the water heater 1, water flows into the valve body 100 from the inlet 110 of the drain device 10, and then flows into the inlet pipe 20 of the water heater body through the outlet 120 of the drain device 10. The water then flows through the heat exchanger 50 to heat it, and the heated water flows out through the outlet pipe 30 of the water heater body for user use. In this case, the body structure 230 of the drain component 200 in the drain device 10 is housed within the drain channel 150 and blocks the drain channel 150. One end of the valve core component 300 passes through the connecting hole 160 and abuts against the guide portion 210 of the drain component 200, causing the other end of the valve core component 300 to move away from the inlet 110. The inlet 110 is unobstructed, and the water in the water inlet pipe 40 of the water heater body cannot be discharged through the drain channel 150 of the valve body 100.

[0087] When drainage is required, the drain component 200 is rotated relative to the valve body 100. The threaded portion 240 on the drain component 200 rotates with the valve body 100, gradually moving the entire drain component 200. This movement causes changes in three locations within the drain device 10. First, the main body structure 230 of the drain component 200 gradually detaches from the drain channel 150, connecting the drain channel 150 to the connecting cavity 600. Water from the drain pipe of the water heater body flows through the drain channel 150 into the connecting cavity 600 and is discharged to the external space through the connecting channel 220 of the drain component 200. Second, the contact position between the guide portion 210 of the drain component 200 and the valve core component 300 changes. Initially, the valve core component 300 moves simultaneously, gradually sealing the inlet 110 to prevent water from continuing to flow in through it. Third, the contact portion 250 of the drain component 200 gradually disengages from the air inlet valve 700. Without the restraint of the contact portion 250, the air inlet valve 700 moves under the elastic force of the second elastic member 500 and opens the air inlet 130. At this time, because the water inlet 110 is closed, the negative pressure at the water inlet pipe 20 of the water heater body causes external space to be sucked into the valve body 100 and flow through the water inlet pipe 20, heat exchanger 50, and water outlet pipe 30 of the water heater 1, thereby applying pressure to the water inside the water heater 1 and promoting more effective drainage. Furthermore, after the drain component 200 moves, the changes in the three parts of the drain device 10 can occur simultaneously, enabling simultaneous linkage control of drainage, water inlet, and air inlet.

[0088] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A drainage device, comprising a valve body and a valve core component, wherein the valve body is provided with an inlet and an outlet that communicate with each other, and the valve core component is moved to open or close the communication between the inlet and the outlet; characterized in that, The drainage device also includes: A drainage component, wherein the valve body is provided with a drainage channel including a water inlet, and the drainage component is moved to open or block the drainage channel; The drainage component and the valve core component are linked together. In the process of the drainage component moving to open the drainage channel, the valve core component drives the valve core component to block the connection between the water inlet and the water outlet. The drainage component includes a body structure and a threaded portion, the threaded portion extending outward in the radial direction of the body structure, and the threaded portion being threadedly connected to the valve body.

2. The drainage device as described in claim 1, characterized in that, The valve core component abuts against the drainage component and changes its abutment position as the drainage component moves, so as to realize that the valve core component itself moves and blocks the connection between the inlet and the outlet.

3. The drainage device as described in claim 2, characterized in that, The drainage component also includes a guide portion, and the valve core component abuts against the guide surface of the guide portion. The size of the guide surface along the movement path of the valve core component changes as it moves.

4. The drainage device as described in claim 3, characterized in that, The guide portion has a frustum structure, the guide surface is the outer surface of the frustum structure, and the axis of the valve core component is perpendicular to the axis of the guide portion.

5. The drainage device as described in claim 2, characterized in that, The drainage device further includes a first elastic element, the two ends of which abut against the valve core component and the valve body respectively, so as to drive the valve core component to abut against the drainage component.

6. The drainage device as described in claim 1, characterized in that, A closed communicating cavity is formed between the drainage component and the valve body, and the drainage component achieves communication between the communicating cavity and the drainage channel during movement; The drainage component has a connecting channel, one end of which is connected to the connecting cavity, and the other end of which leads to the external space.

7. The drainage device as described in claim 6, characterized in that, The drainage component includes a body structure and a threaded portion. The threaded portion extends outward along the radial direction of the body structure and is threadedly connected to the valve body. The threaded portion, the body structure, and the valve body form the communicating cavity.

8. The drainage device as described in claim 1, characterized in that, The valve body has an air inlet between the water inlet and the water outlet; The drainage device also includes an air inlet valve, which abuts against the drainage component and can be disengaged from the drainage component as the drainage component moves, so that the air inlet valve opens the air inlet.

9. The drainage device as described in claim 8, characterized in that, One end of the drainage component is provided with an abutment portion, and the air intake valve abuts against the drainage component through the abutment portion. The gap between the abutment portion and the valve body forms the drainage channel.

10. The drainage device as described in claim 8, characterized in that, The drainage device further includes a second elastic element, the two ends of which abut against the air inlet valve and the valve body respectively, so as to drive the air inlet valve to abut against the drainage component.

11. The drainage device as claimed in claim 1, characterized in that, One end of the drainage component is provided with an abutment, and the gap between the abutment and the valve body forms the drainage channel. A closed communicating cavity is formed between the drainage component and the valve body. The drainage component has a communicating channel, one end of which is connected to the communicating cavity, and the other end of which is connected to the external space. The drainage device also includes an air inlet valve, wherein the valve body has an air inlet between the water inlet and the water outlet, and the air inlet valve abuts against the abutting part; During the movement of the drainage component, the communicating cavity gradually connects with the drainage channel, and the air inlet valve gradually disengages from the abutment portion to open the air inlet.

12. A water heater, characterized in that, The water heater includes: Water heater body; The drainage device as described in any one of claims 1-11, wherein the outlet of the drainage device is connected to the inlet pipe of the water heater body, and the inlet of the drainage device is connected to the inlet pipe of the water heater body.

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