Water heater

Abstract

The utility model discloses a water heater. The water heater comprises an inner container used for containing water; the heating element is used for heating water in the inner container; the water inlet pipe and the water outlet pipe extend into the inner container; the water heater is provided with a water inlet, a water outlet and a water outlet; the water outlet can be communicated with a water outlet pipe; the water outlet can be communicated with a water outlet pipe; the valve element is used for controlling the communicating state of the water outlet and the water outlet pipe and has a first state for communicating the water outlet and the water outlet pipe and a second state for blocking the water outlet and the water outlet pipe, and when the valve element is in the first state, water in the inner container is discharged out of the water heater through the water outlet pipe and the water outlet; water in the water supply pipeline enters the inner container through the water inlet and the water inlet pipe. According to the application, the convenience and the intelligent degree of updating the water in the inner container can be improved, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a water heater. Background Art

[0002] Existing water heaters mainly include: gas water heaters, heat pump water heaters, solar water heaters and electric water heaters, etc. Among them, a water heater provided with a water tank (or inner tank) with a certain water storage capacity is a storage water heater.

[0003] For storage water heaters, users may not use them for a long time due to some special reasons (such as business trips, vacations, vacant houses, etc.). When the water in the tank is not used for a long time, it is in a static state without flowing, which is prone to problems such as breeding bacteria and producing odors. After the user has not used water for a long time, the water in the tank needs to be drained and the water in the tank needs to be renewed before using water again.

[0004] At present, the existing method of draining the water in the inner tank is mainly to operate the drain valve provided on the inner tank. Specifically, when operating the drain valve, the user first needs to remove the maintenance cover outside the drain valve, then connect the drain valve to the corresponding drain pipeline, and finally open the drain valve to drain the sewage. The whole process requires manual operation by the user, which is time-consuming and labor-intensive, and the user experience is poor.

[0005] Therefore, it is necessary to propose a water heater to solve the above problems. Utility Model Content

[0006] In view of the defects existing in the prior art, a water heater is provided in the embodiment of the utility model, which can at least improve the convenience and intelligence of updating the water in the inner tank, thereby improving the user experience.

[0007] The specific technical solution of the implementation mode of the utility model is:

[0008] A water heater, the water heater comprising: an inner tank for containing water; a heating element arranged on the inner tank for heating the water in the inner tank; a water inlet pipe and a water outlet pipe extending into the inner tank are arranged on the inner tank; the water heater has a water inlet, a water outlet and a water drain, the water inlet is used to allow water in a water supply pipeline to enter the water heater, the water outlet is used to output the water in the inner tank to a water point, and the water drain is used to drain the water in the inner tank to the outside of the water heater; the water inlet is connected to the water inlet pipe The water outlet can be connected to the water outlet pipe; the drain port can be connected to the water outlet pipe; a valve element is used to control the connection state between the drain port and the water outlet pipe, the valve element has a first state of connecting the drain port to the water outlet pipe and a second state of blocking the drain port from the water outlet pipe, when the valve element is in the first state, the water in the inner tank is discharged to the outside of the water heater through the water outlet pipe and the drain port, and the water in the water supply pipeline enters the inner tank through the water inlet and the water inlet pipe.

[0009] In a preferred embodiment, the water heater has a drainage channel, and the drainage port is connected to the drainage channel or the drainage port is arranged at the end of the drainage channel.

[0010] In a preferred embodiment, the inlet of the drainage channel is communicated with the water outlet pipe, and the valve element is a switch valve arranged on the drainage channel.

[0011] In a preferred embodiment, the inlet of the drainage channel is connected to the first channel between the water outlet pipe and the water outlet.

[0012] In a preferred embodiment, the valve element is a switching valve arranged on the first channel between the water outlet pipe and the water outlet, and when the switching valve is in a first state, the drainage channel is connected to the water outlet pipe, and when the switching valve is in a second state, the drainage channel is blocked from the water outlet pipe.

[0013] In a preferred embodiment, the switching valve is a three-way switching valve, which has a first interface connected to the water outlet pipe and receiving water flowing out of the water outlet pipe, a second interface connected to the water outlet and supplying water to the water outlet, and a third interface connected to the drainage channel and supplying water to the drainage channel; when the switching valve is in a first state, the first interface is connected to the third interface, and when the switching valve is in a second state, the first interface is connected to the second interface.

[0014] In a preferred embodiment, the water heater also has a three-way pressure relief valve arranged between the water inlet and the water inlet pipe, the pressure relief valve has a water inlet channel and a pressure relief channel, the pressure relief channel has a discharge port, the water inlet channel is used to connect the water inlet and the water inlet pipe, the pressure relief channel is used to connect the water inlet pipe with the discharge port when the pressure in the inner tank is greater than a preset pressure, the drain port is connected to the discharge port, or the drain port and the discharge port can be connected.

[0015] In a preferred embodiment, the water heater further comprises a scale inhibition unit and / or a filter unit, and the scale inhibition unit and / or the filter unit are used to purify the water flowing out of the water inlet pipe.

[0016] In a preferred embodiment, the anti-scaling unit and / or the filtering unit is arranged on the water inlet pipe and located in the inner tank, and at least part of the water flowing out of the water inlet pipe enters the inner tank through the anti-scaling unit and / or the filtering unit.

[0017] In a preferred embodiment, the water heater further comprises a filtering structure, and the filtering structure is arranged on the flow passage between the water outlet pipe and the drain port.

[0018] In a preferred embodiment, the water heater further comprises a water circuit module, and the valve element and the drainage channel are both integrated on the water circuit module.

[0019] In a preferred embodiment, the water heater further comprises a controller and a detection unit electrically connected to the controller, wherein the detection unit comprises any one of the following or a combination thereof: a temperature detection element, a flow detection element, and a pressure detection element.

[0020] In a preferred embodiment, the water heater further includes a controller and a communication module electrically connected to the controller, and the controller can transmit signals to the user's APP through the communication module.

[0021] In a preferred embodiment, the inner pot includes a first inner pot and a second inner pot arranged in sequence along the height direction, the first inner pot is connected to the second inner pot, the water inlet pipe is provided with a first water inlet and a first water outlet, the water outlet pipe is provided with a second water inlet and a second water outlet, the water outlet pipe passes through the first inner pot and extends into the second inner pot, the first water outlet is located in the first inner pot, and the second water inlet is located in the second inner pot.

[0022] In a preferred embodiment, the water heater has a normal water use mode and a running water mode. In the normal water use mode, the water outlet pipe and the water outlet are in a connected state, the drain port and the water outlet pipe are in a blocked state, the water entering from the water inlet enters the inner tank through the water inlet pipe, and the water in the inner tank flows to the water use point through the water outlet pipe and the water outlet; in the running water mode, the water outlet pipe and the drain port are in a connected state, the water entering from the water inlet enters the inner tank through the water inlet pipe, and the water in the inner tank is discharged to the outside of the water heater through the water outlet pipe and the drain port.

[0023] A water heater, the water heater comprising: an inner tank for containing water; a heating element arranged on the inner tank for heating the water in the inner tank; a water inlet pipe and a water outlet pipe extending into the inner tank are arranged on the inner tank; the water heater has a water inlet, a water outlet and a drain, the water inlet is used to allow water in a water supply pipeline to enter the water heater, the water outlet is used to output the water in the inner tank to a water point, and the drain is used to drain the water in the inner tank to the outside of the water heater; the water inlet can be connected to the water outlet; the drain can be connected to the water inlet; a first valve for controlling the connection state between the drain and the water inlet element, a second valve element for controlling the connection state between the water inlet and the water outlet, the first valve element having a first state for connecting the drain port with the water inlet and a second state for blocking the drain port from the water inlet, the second valve element having a third state for connecting the water inlet with the water outlet and a fourth state for blocking the water inlet with the water outlet, when the first valve element is in the first state and the second valve element is in the third state, the water in the inner tank is discharged to the outside of the water heater through the water inlet and the drain port, and the water in the water supply pipeline enters the inner tank through the water inlet and the water outlet.

[0024] In a preferred embodiment, the water heater has a drainage channel, and the drainage port is connected to the drainage channel or the drainage port is arranged at the end of the drainage channel.

[0025] In a preferred embodiment, the inlet of the drainage channel is communicated with the water inlet pipe, and the first valve element is a first switch valve provided on the drainage channel.

[0026] In a preferred embodiment, the inlet of the drainage channel is connected to a second channel between the water inlet pipe and the water inlet.

[0027] In a preferred embodiment, the first valve element is a first switching valve arranged on the second channel between the water inlet pipe and the water inlet, and when the first switching valve is in a first state, the drainage channel is connected to the water inlet pipe, and when the first switching valve is in a second state, the drainage channel is blocked from the water inlet pipe.

[0028] In a preferred embodiment, the first switching valve is a three-way switching valve, which has a first interface connected to the water inlet pipe and receiving water flowing out of the water inlet pipe, a second interface connected to the water inlet and receiving water flowing into the water inlet, and a third interface connected to the drainage channel and delivering water to the drainage channel; when the first switching valve is in a first state, the first interface and the third interface are connected, and the first interface and the second interface are in a blocked state, and when the first switching valve is in a second state, the first interface is connected to the second interface.

[0029] In a preferred embodiment, the water heater also has a three-way pressure relief valve arranged between the water inlet and the water inlet pipe, the pressure relief valve has a water inlet channel and a pressure relief channel, the pressure relief channel has a discharge port, the water inlet channel is used to connect the water inlet and the water inlet pipe, the pressure relief channel is used to connect the water inlet pipe with the discharge port when the pressure in the inner tank is greater than a preset pressure, the drain port is connected to the discharge port, or the drain port and the discharge port can be connected.

[0030] In a preferred embodiment, the water heater is provided with a bypass channel connecting the water inlet with the water outlet pipe, one end of the bypass channel is connected to the second channel between the water inlet and the water inlet pipe, and the other end of the bypass channel is connected to the first channel between the water outlet and the water outlet pipe.

[0031] In a preferred embodiment, the second valve element is a second switch valve arranged on the bypass flow channel. When the second switch valve is in a closed third state, the water inlet is connected to the water outlet pipe. When the second switch valve is in a disconnected fourth state, the water inlet and the water outlet pipe are in a blocked state.

[0032] In a preferred embodiment, the second valve element is a second switching valve arranged on the second channel between the water inlet pipe and the water inlet, when the second switching valve is in the third state, the water inlet is connected to the water outlet pipe, and when the second switching valve is in the fourth state, the water inlet is blocked from the water outlet pipe.

[0033] In a preferred embodiment, the second switching valve is a three-way switching valve, which has a first connecting port connected to the water inlet and receiving water flowing out of the water supply pipeline, a second connecting port connected to the water inlet pipe and supplying water to the water inlet pipe, and a third connecting port connected to the bypass flow channel and supplying water to the bypass flow channel; when the second switching valve is in the third state, the first connecting port and the third connecting port are connected, and the first connecting port and the second connecting port are in a blocked state; when the second switching valve is in the fourth state, the first connecting port and the second connecting port are connected.

[0034] In a preferred embodiment, the second valve element is a second switching valve arranged on the first channel between the water outlet pipe and the water outlet, and the water heater also includes a third valve element for controlling the connection state between the water inlet and the inner tank. When the second switching valve is in the third state, the water inlet is connected to the water outlet pipe, the third valve element is in a disconnected state, and the water inlet is not connected to the inner tank; when the second switching valve is in the fourth state, the water inlet is blocked from the water outlet pipe, the third valve element is in a closed state, and the water inlet is connected to the inner tank.

[0035] In a preferred embodiment, the second switching valve is a three-way switching valve, which has a first connecting port connected to the water outlet pipe and supplies water to the water outlet pipe, a second connecting port connected to the water outlet and supplies water to the water outlet, and a third connecting port connected to the bypass flow channel and receives water flowing out of the bypass flow channel; when the second switching valve is in the third state, the first connecting port and the third connecting port are connected, and the first connecting port and the second connecting port are in a blocked state, and when the second switching valve is in the fourth state, the first connecting port and the second connecting port are connected.

[0036] In a preferred embodiment, the water heater has a normal water use mode and a running water mode. In the normal water use mode, the water outlet pipe and the water outlet are in a connected state, the drain port and the water outlet pipe are in a blocked state, the water entering from the water inlet enters the inner tank through the water inlet pipe, and the water in the inner tank flows to the water use point through the water outlet pipe and the water outlet; in the running water mode, the water inlet pipe and the drain port are in a connected state, the water entering from the water inlet enters the inner tank through the water outlet pipe, and the water in the inner tank is discharged to the outside of the water heater through the water inlet pipe and the drain port.

[0037] The technical solution of the utility model has the following significant beneficial effects:

[0038] In the embodiment provided by the present application, the water heater is provided with a valve element for controlling the connection state between the drain port and the water outlet pipe, wherein the valve element has a first state of connecting the drain port to the water outlet pipe and a second state of blocking the drain port from the water outlet pipe. When the valve element is in the first state, the water in the inner tank is discharged to the outside of the water heater through the water outlet pipe and the drain port, and the water in the water supply pipeline enters the inner tank through the water inlet and the water inlet pipe, thereby updating the water in the inner tank of the water heater. The entire updating process only requires switching the valve element from the second state of blocking the drain port from the water outlet pipe to the first state of connecting the drain port to the water outlet. The switching process is simple to operate and can be achieved by automatic control or by manually triggering the corresponding function key. There is no need to disassemble and assemble the mechanical structure of the valve element, etc., which improves the convenience and intelligence of updating the water in the inner tank as a whole and improves the user experience.

[0039] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0041] Figure 1 This is a schematic structural diagram of a first water heater provided in an embodiment of the present application;

[0042] Figure 2 This is a schematic diagram of the structure of a second water heater provided in an embodiment of the present application;

[0043] Figure 2A for Figure 2 A partial enlarged schematic diagram of point E in the middle;

[0044] Figure 3 This is a schematic diagram of the structure of a third water heater provided in an embodiment of the present application;

[0045] Figure 3B for Figure 3 A schematic structural diagram of a water circuit module of a water heater provided in;

[0046] Figure 4 This is a schematic structural diagram of a fourth water heater provided in an embodiment of the present application;

[0047] Figure 5 This is a schematic structural diagram of a fifth water heater provided in an embodiment of the present application;

[0048] Figure 6 This is a schematic structural diagram of a sixth water heater provided in an embodiment of the present application;

[0049] Figure 7 This is a schematic structural diagram of a seventh water heater provided in an embodiment of the present application;

[0050] Figure 8 This is a schematic structural diagram of an eighth water heater provided in an embodiment of the present application;

[0051] Fig. 9 This is a schematic structural diagram of a ninth water heater provided in an embodiment of the present application;

[0052] Fig.10 This is a schematic structural diagram of a tenth water heater provided in an embodiment of the present application;

[0053] Fig.11 This is a schematic structural diagram of an eleventh water heater provided in an embodiment of the present application;

[0054] Fig.12 This is a schematic structural diagram of a twelfth water heater provided in an embodiment of the present application;

[0055] Fig.13 This is a schematic structural diagram of a thirteenth water heater provided in an embodiment of the present application;

[0056] Fig.14 This is a schematic diagram of the structure of the fourteenth water heater provided in the embodiment of the present application.

[0057] 1. Inner liner;

[0058] 11. First liner;

[0059] 12. Second liner;

[0060] 2. Heating element;

[0061] 3. Water inlet pipe;

[0062] 31. First water inlet;

[0063] 32. First water outlet;

[0064] 4. Water outlet pipe;

[0065] 41. Second water inlet;

[0066] 42. Second water outlet;

[0067] 51. Water inlet;

[0068] 52. Water outlet;

[0069] 53. Drainage outlet;

[0070] 54. First channel;

[0071] 55. Second channel;

[0072] 61. Switch valve;

[0073] 62. Three-way switching valve;

[0074] 621, first interface;

[0075] 622, second interface;

[0076] 623, the third interface;

[0077] 63. Pressure relief valve;

[0078] 632, pressure relief channel;

[0079] 6320, discharge port;

[0080] 7. Drainage channel;

[0081] 8. Water treatment components

[0082] 81. Filter structure;

[0083] 9. Waterway module;

[0084] 91. Water inlet interface;

[0085] 92. Water outlet interface;

[0086] 64. A first valve element;

[0087] 65. Second valve element;

[0088] 66. The third valve element;

[0089] 71. Bypass flow channel. DETAILED DESCRIPTION

[0090] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art fall within the scope defined by the claims attached to this application.

[0091] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0092] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0093] The utility model provides a water heater, which can improve the convenience and intelligence of updating water in an inner tank and improve the use experience of users.

[0094] Please refer to Figures 1 to 9 In the embodiment of the specification of the present application, a water heater is provided, which may include: an inner tank 1 for containing water; a heating element 2 arranged on the inner tank 1 for heating the water in the inner tank 1; the inner tank 1 is provided with a water inlet pipe 3 and a water outlet pipe 4 extending into the inner tank 1; the water heater has a water inlet 51, a water outlet 52, and a water drain 53, the water inlet 51 is used to allow water in a water supply pipeline to enter the water heater, the water outlet 52 is used to output the water in the inner tank 1 to a water point, and the water drain 53 is used to discharge the water in the inner tank 1 to the outside of the water heater; the water inlet 51 is used to allow water in a water supply pipeline to enter the water heater, the water outlet 52 is used to output the water in the inner tank 1 to a water point, and the water drain 53 is used to discharge the water in the inner tank 1 to the outside of the water heater; the water inlet 5 1 is connected to the water inlet pipe 3; the water outlet 52 can be connected to the water outlet pipe 4; the drain port 53 can be connected to the water outlet pipe 4; a valve element is used to control the communication state of the drain port 53 and the water outlet pipe 4, the valve element has a first state of connecting the drain port 53 with the water outlet pipe 4 and a second state of blocking the drain port 53 from the water outlet pipe 4, when the valve element is in the first state, the water in the inner tank 1 is discharged to the outside of the water heater through the water outlet pipe 4 and the drain port 53, and the water in the water supply pipeline enters the inner tank 1 through the water inlet 51 and the water inlet pipe 3.

[0095] Among them, the water heater provided in the embodiment of the present application mainly includes: an inner tank 1, a heating element 2, a water inlet pipe 3, a water outlet pipe 4, a water inlet 51, a water outlet 52, a drain outlet 53, a valve element, etc.

[0096] In this embodiment, the water heater is a storage water heater provided with an inner tank 1. The specific form of the storage water heater may include any one of the following: an electric water heater, a heat pump water heater, a solar water heater, etc. In the embodiment of the present application, the storage water heater is mainly illustrated by an electric water heater. Other forms of storage water heaters can refer to the description of the embodiment of the present application, and the present application will not describe them one by one here.

[0097] The inner tank 1 may be a hollow thin-walled structure, and an inner cavity for storing water is formed inside the inner tank 1. The volume of the inner cavity corresponds to the volume of the water heater, and the volume of the inner cavity may be 40 liters, 60 liters, 80 liters, 100 liters, etc. The number of the inner tanks 1 may be one, two, or even more. Figures 1 to 6 , mainly showing an implementation method including an inner liner. Figures 7 to 9 , mainly showing an implementation method including two inner liners (a first inner liner 11 and a second inner liner 12).

[0098] The heating element 2 can be arranged on the inner tank 1 to heat the water in the inner tank 1. When the storage water heater is an electric water heater, the heating element 2 of the storage water heater can be in the form of at least one electric heating rod. Of course, the specific form of the heating element 2 is not limited to the above examples, and it can also be in other forms.

[0099] The inner liner 1 is provided with an inlet pipe 3 and an outlet pipe 4, which can be respectively provided on the inner liner 1, and can be located at different positions; or, the inlet pipe 3 and the outlet pipe 4 can also be provided on the inner liner 1 in an inner-outer-outer manner, and the positions where the inlet pipe 3 and the outlet pipe 4 are installed on the inner liner 1 have overlapping parts. In the drawings provided in the present application, the inlet pipe 3 and the outlet pipe 4 are respectively provided on the inner liner 1 as an example for illustration.

[0100] The water heater has a water inlet 51, a water outlet 52, and a drain 53. The water inlet 51 is connected to the water inlet pipe 3, and the water in the water supply pipeline can flow into the inner tank 1 through the water inlet 51 and the water inlet pipe 3. The water outlet 52 can be connected to the water outlet pipe 4, and the water in the inner tank 1 can be output to the water point through the water outlet pipe 4 and the water outlet 52. The drain 53 can also be connected to the water outlet pipe 4. When the water heater needs to update the water in the inner tank 1, the drain 53 is connected to the water outlet pipe 4, so that the water in the inner tank 1 is discharged to the outside through the drain 53.

[0101] In the embodiment of the present application, the valve element is used to control the communication state between the drain port 53 and the water outlet pipe 4. The valve element has a first state in which the drain port 53 is connected to the water outlet pipe 4 and a second state in which the drain port 53 is blocked from the water outlet pipe 4. When the valve element is in the first state, the water in the inner tank 1 is discharged to the outside of the water heater through the water outlet pipe 4 and the drain port 53, and the water in the water supply pipeline enters the inner tank 1 through the water inlet 51 and the water inlet pipe 3, thereby updating the water in the inner tank 1 of the water heater. The entire updating process only requires switching the valve element from the second state in which the drain port 53 is blocked from the water outlet pipe 4 to the first state in which the drain port 53 is connected to the water outlet pipe 4. The switching process is simple to operate and can be achieved by automatic control or by manually triggering the corresponding function key. There is no need to disassemble and assemble the mechanical structure of the valve element, etc., which improves the convenience and intelligence of updating the water in the inner tank 1 as a whole and improves the user experience.

[0102] The present application will be described in detail below with reference to specific drawings and implementation methods.

[0103] See also Figure 1 or Figure 2 In some embodiments, the water heater has a drainage channel 7 , and the drainage port 53 is connected to the drainage channel 7 or the drainage port 53 is arranged at the end of the drainage channel 7 .

[0104] In this embodiment, the water heater may be provided with a drainage channel 7, which is mainly used to drain the water to be discharged from the inner tank 1 to a designated location, such as a downpipe, a floor drain, etc. The drain port 53 may be an opening (not shown in the figure) on the first channel 54 provided between the outlet pipe 4 and the outlet 52. The drainage channel 7 may be connected to the drain port 53 of the water heater, and the drainage channel 7 may be a detachable pipe. In the direction of water flow, an inlet is formed at the head end of the drainage channel 7, and the inlet may be connected to the drain port 53 of the water heater. An outlet is formed at the end of the drainage channel 7, and the position of the outlet may be installed in a corresponding position according to the position where the user can drain the water.

[0105] Or, if Figure 1 As shown, the drainage channel 7 can maintain a connection with the water heater, wherein the drainage port 53 can be provided at the end of the drainage channel 7. When the water in the inner tank 1 needs to be renewed, the water in the inner tank 1 can pass through the water outlet pipe 4 and the drainage channel 7 and be discharged outward through the drainage port 53.

[0106] like Figure 1 As shown, in the first embodiment, the inlet of the drainage channel 7 is communicated with the water outlet pipe 4 , and the valve element is a switch valve 61 provided on the drainage channel 7 .

[0107] In this embodiment, the valve element may be in the form of a switch valve 61 , and the switch valve 61 may be a normally closed solenoid valve, or the switch valve 61 may be in other forms.

[0108] When the water in the inner tank 1 needs to be renewed, the switch valve 61 is switched from an open state to a closed state, thereby connecting the drain port 53 with the water outlet pipe 4, and allowing the water in the inner tank 1 to be discharged outward through the water outlet pipe 4, the drainage channel 7, and the drain port 53.

[0109] Among them, the water heater can be provided with a controller, and the switch valve 61 can be electrically connected to the controller. When the water in the inner tank 1 needs to be updated, the controller sends a corresponding control instruction to the switch valve 61 to change the state of the switch valve 61, that is, the switch valve 61 is switched from an open state to a closed state, thereby realizing the update of the water in the inner tank 1. The operation is convenient as a whole, which is conducive to improving the user experience.

[0110] Furthermore, the inlet of the drainage channel 7 is connected to the first channel 54 between the water outlet pipe 4 and the water outlet 52 .

[0111] In this embodiment, a first channel 54 is provided on the outside of the inner tank 1, and the water outlet pipe 4 and the water outlet 52 can be connected through the first channel 54. Specifically, the first channel 54 can be in the form of a hollow pipe, or it can be in the form of a flow channel provided inside the water channel module 9. Of course, the specific form of the first channel 54 is not limited to the above examples, and technical personnel in this field do not make specific limitations here.

[0112] like Figure 2 As shown, in the second embodiment, the valve element is a switching valve arranged on the first channel 54 between the water outlet pipe 4 and the water outlet 52, and when the switching valve is in a first state, the drainage channel 7 is connected to the water outlet pipe 4, and when the switching valve is in a second state, the drainage channel 7 is blocked from the water outlet pipe 4.

[0113] In this embodiment, a switching valve can be set on the first channel 54, and the switching valve includes at least two states (a first state and a second state). When the switching valve is in the first state, the drainage channel 7 can be connected with the water outlet pipe 4, and the water to be updated in the inner tank 1 can be discharged outward through the water outlet pipe 4 and the drainage channel 7; when the switching valve is in the second state, the drainage channel 7 can be blocked from the water outlet pipe 4 to ensure that the water in the inner tank 1 can be output outward through the water outlet pipe 4 and the water outlet 52 to be supplied to the user.

[0114] Please refer to Figure 2A Specifically, the switching valve may be a three-way switching valve. When the switching valve is a three-way switching valve, the three-way switching valve has a first interface 621 connected to the water outlet pipe 4 and receiving water flowing out of the water outlet pipe 4, a second interface 622 connected to the water outlet 52 and delivering water to the water outlet 52, and a third interface 623 connected to the drainage channel 7 and delivering water to the drainage channel 7; when the switching valve is in a first state, the first interface 621 is connected to the third interface 623, and when the switching valve is in a second state, the first interface 621 is connected to the second interface 622.

[0115] In this embodiment, the switching valve may be a three-way switching valve. When the switching valve is a three-way switching valve, it may include a first interface 621, a second interface 622, and a third interface 623. Of course, the switching valve may also be in the form of a multi-way switching valve with more interfaces. Specifically, the form of the switching valve may vary according to the different pipeline positions where it is installed. Inspired by the technical essence of this application, other changes may be made, but as long as the functions and effects achieved are the same or similar to those of this application, they should be included in the protection scope of this application. In the embodiment of this application, the switching valve is a three-way switching valve as an example for explanation.

[0116] In the direction of water flow, the first interface 621 of the three-way switching valve can be located downstream of the water outlet pipe 4. The first interface 621 is connected to the water outlet pipe 4 and is used to receive water flowing out from the inner tank 1 through the water outlet pipe 4 for supply to the user.

[0117] In the direction of water flow, the second interface 622 of the three-way switching valve can be located upstream of the water outlet 52. The second interface 622 is connected to the water outlet 52 and is used to output water flowing out of the inner tank 1 through the water outlet pipe 4 to the water outlet 52 for supply to the user.

[0118] In the direction of the water flow path, the third interface 623 of the three-way switching valve can be located upstream of the drainage channel 7 to receive the water to be renewed that flows out from the inner tank 1 through the water outlet pipe 4 .

[0119] The three-way switching valve includes a first state and a second state. When the three-way switching valve is in the first state, the first interface 621 and the third interface 623 are connected, and the water to be updated in the inner tank 1 can flow through the outlet pipe 4 and the drainage channel 7 and then be discharged outward.

[0120] When the three-way switching valve is in the second state, the first interface 621 is connected to the second interface 622, and the water in the inner tank 1 flows through the water outlet pipe 4, the first channel 54, and the water outlet 52 to be supplied to the user.

[0121] See also Figure 1 In some embodiments, the water heater further has a three-way pressure relief valve 63 arranged between the water inlet 51 and the water inlet pipe 3, the pressure relief valve 63 has a water inlet channel and a pressure relief channel 632, the pressure relief channel 632 has a discharge port 6320, the water inlet channel is used to connect the water inlet 51 and the water inlet pipe 3, the pressure relief channel 632 is used to connect the water inlet pipe 3 with the discharge port 6320 when the pressure in the inner tank 1 is greater than a preset pressure, the drain port 53 is connected to the discharge port 6320, or the drain port 53 and the discharge port 6320 can be connected.

[0122] For the water heater, its inner tank 1 is under pressure in the working state, and when the pressure in the inner tank 1 exceeds the preset pressure, the pressure in the inner tank 1 can be released to the outside through the pressure relief valve 63. Among them, the preset pressure is the standard pressure to ensure the safe and reliable operation of the inner tank 1.

[0123] In the embodiment of the present application, the structure of the pressure relief valve 63 can be utilized to implement the operation of refreshing the water in the inner tank 1 by utilizing the pressure relief channel 632 of the pressure relief valve 63 .

[0124] Specifically, the pressure relief valve 63 may be a three-way pressure relief valve 63 disposed between the water inlet 51 and the water inlet pipe 3, and the pressure relief valve 63 has a water inlet channel and a pressure relief channel 632. The water inlet channel is used to connect the water inlet 51 and the water inlet pipe 3, ensuring that the water flowing into the water inlet 51 can be supplied to the inner tank 1 through the water inlet pipe 3. In the direction of water flow, the end of the pressure relief channel 632 may be a discharge port 6320. When the pressure in the inner tank 1 is greater than the preset pressure, the water inlet pipe 3 may be connected to the discharge port 6320, so that the excessive pressure in the inner tank 1 is discharged to the outside through the discharge port 6320.

[0125] like Figure 1 As shown, for the embodiment in which the drain port 53 is arranged at the end of the drain channel 7, the drain port 53 can be directly connected to the pressure relief channel 632, as shown in FIG. Figure 3 As shown, the drain outlet 53 is always connected to the discharge outlet 6320.

[0126] With regard to the embodiment (not shown) in which the drain port 53 is arranged at an opening on the first passage 54 between the outlet pipe 4 and the outlet 52 , when the valve element is in the first state, the drain port 53 is connected to the discharge port 6320 .

[0127] like Figure 3 As shown, in the third embodiment, the end of the drainage channel 7 can be connected to the pressure relief channel 632. When the valve element is in the first state, the drainage channel 7 is in a connected state, the drainage port 53 is connected to the discharge port 6320, and the water in the inner tank 1 that needs to be updated can be discharged outward through the water outlet pipe 4, the drainage channel 7, and the pressure relief channel 632.

[0128] In the present embodiment, the drainage channel 7 makes use of the pressure relief channel 632 of the current water heater, which can make the structure of the whole machine compact. Moreover, since the pressure relief channel 632 itself is connected to the sewer, floor drain, etc., there is no need to set up additional pipes connecting the sewer pipe, floor drain, etc., which can not only reduce the cost, but also can be integrated with the pressure relief valve 63, the pressure relief channel 632, etc.

[0129] See also Figure 3B In some embodiments, the water heater may further include a water circuit module 9 , and the valve element and the drainage channel 7 are both integrated on the water circuit module 9 .

[0130] Specifically, the water circuit module 9 may be integrated with a valve element and a drainage channel 7. In addition, the water circuit module 9 may also be integrated with a pressure relief valve 63, a pressure relief channel 632, a first channel 54 disposed between the water outlet pipe 4 and the water outlet 52, a second channel 55 disposed between the water inlet 51 and the water inlet pipe 3, the water inlet 51, and the water outlet 52. By highly integrating the valve element, the drainage channel 7, the pressure relief valve 63, the pressure relief channel 632, the first channel 54, and the second channel 55, not only can the water circuit ensure normal pressure relief and drainage functions, but also the components outside the inner liner 1 can be miniaturized and the components outside the inner liner 1 can be concentrated in a shell with a smaller volume.

[0131] The water circuit module 9 can also improve the convenience of installing the water heater. The water circuit module 9 is provided with a water inlet interface 91 and a water outlet interface 92. When installing the water circuit module 9, it is only necessary to connect the water inlet interface 91 to the water inlet pipe 3, the water outlet interface 92 to the water outlet pipe 4, the integrated water inlet 51 to the water supply pipeline, and the water outlet 52 to the water use pipeline.

[0132] In addition, the water channel module 9 may also be independently provided with a controller for controlling the opening and closing state of the valve element and a communication module for communicating with the outside.

[0133] A function key for activating water may be provided on the outside of the water circuit module 9. When the water in the inner tank 1 needs to be renewed, the function key may be operated to put the valve element in the first state, so that the water in the inner tank 1 is discharged to the outside of the water heater through the water outlet pipe 4, the drainage channel 7 and the pressure relief channel 632, and the water in the water supply pipeline enters the inner tank 1 through the water inlet 51 and the water inlet pipe 3.

[0134] Alternatively, the water circuit module 9 may also be provided with a communication module. The controller may communicate with the user's APP through the communication module. When the user sends a control instruction to turn on the live water function to the controller by operating the APP, the controller may control the valve element to be in the first state, so that the water in the inner tank 1 is discharged to the outside of the water heater through the water outlet pipe 4, the drainage channel 7, and the pressure relief channel 632, and the water in the water supply pipeline enters the inner tank 1 through the water inlet 51 and the water inlet pipe 3.

[0135] Alternatively, the controller also stores a control program for switching the working state of the valve element. When the preset conditions stored in the control program are met, the valve element is controlled to be in the first state, so that the water in the inner tank 1 is discharged to the outside of the water heater through the water outlet pipe 4 and the drain port 53, and the water in the water supply pipeline enters the inner tank 1 through the water inlet 51 and the water inlet pipe 3.

[0136] Please refer to Figure 4 In the fourth embodiment, the water heater may further include a water treatment component 8, which is used to purify the water flowing out of the water inlet pipe 3, that is, to purify the water flowing into the inner tank 1. Specifically, the water treatment component 8 may include at least one of a scale inhibition unit and a filter unit. Specifically, the scale inhibition unit and / or the filter unit are arranged on the water inlet pipe 3 and located in the inner tank 1, and at least part of the water flowing out of the water inlet pipe 3 enters the inner tank 1 through the scale inhibition unit and / or the filter unit. Of course, the water treatment unit may also include other forms that can purify water.

[0137] like Figure 4 As shown, the water treatment component 8 includes a scale inhibition unit and a filtration unit for example. Other embodiments, such as the water treatment component 8 may only include a scale inhibition unit, or may only include a filtration unit, or may also include other forms of embodiments, can refer to the embodiments listed in the specification of this application, and this application will not describe them one by one here.

[0138] Specifically, the scale inhibition unit and the filter unit are arranged on the water inlet pipe 3 and located in the inner tank 1, and at least part of the water flowing out of the water inlet pipe 3 enters the inner tank 1 through the scale inhibition unit and the filter unit.

[0139] Since water may contain calcium and magnesium ions, scale will form during use. Especially in the field of water heaters, since water needs to be heated during use, scale is more likely to form. In order to prevent water from scaling, it is usually necessary to treat the water with an antiscalant. Among them, the antiscalant unit can be in the form of antiscalant particles, which can be provided with a cavity for installing the antiscalant particles at the position where the water inlet pipe 3 is located in the inner tank 1, and a flow hole is provided on the cavity. The water flowing into the inner tank 1 from the water inlet pipe 3 can pass through the cavity containing the antiscalant particles and then flow into the inner tank 1, so that the antiscalant unit is used to perform antiscaling treatment on the water flowing out of the water inlet pipe 3 to prevent calcium ions and magnesium ions from reacting with CO3. 2- reaction.

[0140] The filter unit can be a filter screen or a filter element. When the filter unit is in the form of a filter screen, the filter screen can be used to intercept particulate impurities to prevent them from entering the inner tank 1. In addition, when the filter unit is in the form of various filter elements, it can realize different functions according to the specific forms of the filter elements. For example, the filter unit can include a filter element prepared by one or more composite layers of ultrafiltration membrane, nanofiltration membrane, reverse osmosis membrane, and PP cotton, and water can be purified when it flows through the filter unit.

[0141] Of course, the specific form of the filter unit can also be other ways, not limited to the above description. Technical personnel in the relevant field may make other changes inspired by the technical essence of this application, but as long as the functions and effects achieved are the same or similar to those of this application, they should be covered within the scope of protection of this application.

[0142] Please refer to Figure 5 and Figure 6 In the fifth to sixth embodiments, the water heater also includes a filtering structure 81, which can be arranged on the flow channel between the water outlet pipe 4 and the valve element. The filtering structure 81 is used to filter the water that needs to be updated in the inner tank 1, especially to prevent impurities from entering the valve element and affecting the reliability of the use of the valve element.

[0143] like Figure 5As shown, in the fifth embodiment, the water heater further includes a filter structure 81, which can be arranged on the drainage channel 7, and the filter structure 81 is used to filter the water in the inner tank 1 that needs to be updated, especially to prevent impurities from entering the valve element and affecting the reliability of the use of the valve element. Specifically, the filter structure 81 can be in the form of a detachable filter screen, which can be used to intercept particulate impurities in the water that needs to be updated flowing out of the inner tank 1, and prevent particulate impurities from entering the valve element, causing the valve element to be blocked. When the filter structure 81 is in the form of a detachable filter screen, it can be easily replaced after being used for a period of time.

[0144] like Figure 6 As shown, in the sixth embodiment, the filter structure 81 can also be arranged on the first channel 54 between the water outlet pipe 4 and the drainage channel 7. The specific form of the filter structure 81 can refer to the specific description of the fifth embodiment. In addition, since the filter structure 81 is arranged on the first channel 54, it can also intercept impurities in the water outputted from the inner tank 1 to the water outlet 52 when the water heater normally supplies water to the outside.

[0145] In some embodiments, the water heater may further include a controller and a detection unit electrically connected to the controller, wherein the detection unit includes any one of the following or a combination thereof: a temperature detection element, a flow detection element, and a pressure detection element.

[0146] In this embodiment, the water heater may include a controller and a detection unit electrically connected to the controller, and the switching of the state of the valve element is controlled by using the signal detected by the detection unit.

[0147] Specifically, the detection unit may include at least one of a temperature detection component, a flow detection component, and a pressure detection component. The temperature detection component is used to detect the water temperature in the inner tank 1. The number of the temperature detection components may include one or more. When there are multiple temperature detection components, they can be distributed in the inner tank 1 at intervals along the height direction, so as to detect the water temperature of different water levels in the inner tank 1, and then accurately obtain the water temperature in the inner tank 1.

[0148] The flow detection element is used to detect whether the water in the inner tank 1 is discharged outward. Specifically, the flow detection element can be set at any position that can detect whether the water in the inner tank 1 is discharged outward, for example, the flow detection element can be set at the water outlet 52.

[0149] The pressure detection component is used to detect the fluctuation of the pressure in the inner tank 1. For example, the pressure detection component can be used to ensure that the inner tank 1 is maintained within a safe pressure range. When the pressure detection component detects that the pressure in the inner tank 1 is greater than the preset pressure, the pressure relief valve 63 can be opened to release the pressure. In addition, the pressure detection component can also be used to detect whether the water in the inner tank 1 is output to the outside. Because when the water in the inner tank 1 is output to the outside, the pressure in the inner tank 1 will fluctuate, and the pressure fluctuation signal detected by the pressure detection component can be used to identify whether the water in the inner tank 1 is output to the outside.

[0150] Of course, the specific form of the detection unit is not limited to the above description. Technical personnel in the relevant field may make other changes inspired by the technical essence of this application. However, as long as the functions and effects achieved are the same or similar to those of this application, they should be covered within the scope of protection of this application.

[0151] When the detection unit is any one of a temperature detection element, a flow detection element and a pressure detection element or a combination thereof, the detection unit can utilize the existing temperature detection element, flow detection element and pressure detection element in the water heater without additional settings.

[0152] Please refer to Figure 7 , Figure 8 and Fig. 9 In the seventh to ninth embodiments, the inner tank 1 includes a first inner tank 11 and a second inner tank 12 arranged in sequence along the height direction, the first inner tank 11 is connected to the second inner tank 12, the water inlet pipe 3 is provided with a first water inlet 31 and a first water outlet 32, the water outlet pipe 4 is provided with a second water inlet 41 and a second water outlet 42, the water outlet pipe 4 passes through the first inner tank 11 and extends into the second inner tank 12, the first water outlet 32 ​​is located in the first inner tank 11, and the second water inlet 41 is located in the second inner tank 12.

[0153] In these embodiments, the inner liner 1 includes a first inner liner 11 and a second inner liner 12 arranged in sequence along the height direction. The second inner liner 12 may be located above the first inner liner 11. The first inner liner 11 and the second inner liner 12 may be horizontally placed. The first inner liner 11 and the second inner liner 12 may be connected via a connecting pipe arranged therebetween. At least one of the first inner liner 11 and the second inner liner 12 may be provided with a heating element 2. Figures 7 to 9 As shown, the first inner pot 11 and the second inner pot 12 may be provided with heating elements 2 respectively.

[0154] The water inlet pipe 3 may be a hollow tube having a first water inlet 31 and a first water outlet 32 ​​, wherein the first water outlet 32 ​​is located in the first inner tank 11 , and the first water inlet 31 may be connected to the second channel 55 .

[0155] The water outlet pipe 4 may be a hollow tube having a second water inlet 41 and a second water outlet 42 . The water outlet pipe 4 passes through the first inner liner 11 and extends into the second inner liner 12 . The second water inlet 41 is located in the second inner liner 12 .

[0156] The specific configuration of the waterway, valve element, and waterway connection relationship outside the first inner liner 11 can refer to the above-mentioned embodiment in which one inner liner is provided.

[0157] like Figure 7 As shown, in the seventh embodiment, the specific settings of the waterway, valve elements, and waterway connectivity outside the first inner tank 11 can refer to the specific description of the first embodiment or the second embodiment, and this application will not elaborate on them here.

[0158] like Figure 8 As shown, in the eighth embodiment, the specific settings of the waterway, valve element, and waterway connection relationship outside the first inner tank 11 can refer to the specific description of the third embodiment, and the present application will not elaborate on them here.

[0159] like Fig. 9 As shown, in the ninth embodiment, the specific settings of the waterway, valve element, and waterway connection relationship outside the first inner tank 11 can refer to the specific description of the third embodiment, and the present application will not elaborate on them here.

[0160] In addition, the water heater may further include a water treatment component 8, such as at least one of a scale inhibition unit and a filter unit, wherein the scale inhibition unit and / or the filter unit is used to purify the water flowing out of the water inlet pipe 3. Specifically, the water treatment component 8 can refer to the specific description of the fourth embodiment, and this application will not elaborate on it here.

[0161] In some embodiments of the present application, the water heater has a normal water use mode and a running water mode. In the normal water use mode, the water outlet pipe 4 is connected to the water outlet 52, and the drain port 53 is blocked from the water outlet pipe 4. The water entering from the water inlet 51 enters the inner tank 1 through the water inlet pipe 3, and the water in the inner tank 1 flows to the water use point through the water outlet pipe 4 and the water outlet 52. In the running water mode, the water outlet pipe 4 is connected to the drain port 53, and the water entering from the water inlet 51 enters the inner tank 1 through the water inlet pipe 3, and the water in the inner tank 1 is discharged to the outside of the water heater through the water outlet pipe 4 and the drain port 53.

[0162] In this embodiment, the water heater includes a normal water mode and a running water mode. The running water mode is set for the scenario where the water in the inner tank 1 needs to be updated. When the water in the inner tank 1 needs to be updated, the water heater can enter the running water mode to automatically update the water in the inner tank 1, thereby improving the convenience and intelligence of updating the water in the inner tank 1 and improving the user experience.

[0163] Specifically, in the normal water use mode, the water outlet pipe 4 and the water outlet 52 are in a connected state, the drain port 53 and the water outlet pipe 4 are in a blocked state, the water entering from the water inlet 51 enters the inner tank 1 through the water inlet pipe 3, and the water in the inner tank 1 flows to the water use point through the water outlet pipe 4 and the water outlet 52.

[0164] In the active water mode, the water outlet pipe 4 and the drain port 53 are in a connected state, the water entering from the water inlet 51 enters the inner tank 1 through the water inlet pipe 3, and the water in the inner tank 1 is discharged to the outside of the water heater through the water outlet pipe 4 and the drain port 53, thereby refreshing the water in the inner tank 1 and preventing the water in the inner tank 1 from standing for a long time, breeding bacteria and generating odor.

[0165] See also Figures 10 to 14In some embodiments of the present application, a water heater is further provided, which may include: an inner tank 1 for containing water; a heating element 2 arranged on the inner tank 1 for heating the water in the inner tank 1; a water inlet pipe 3 and a water outlet pipe 4 extending into the inner tank 1 are arranged on the inner tank 1; the water heater has a water inlet 51, a water outlet 52, and a drain 53, the water inlet 51 is used to allow water in a water supply pipeline to enter the water heater, the water outlet 52 is used to output the water in the inner tank 1 to a water point, and the drain 53 is used to discharge the water in the inner tank 1 to the outside of the water heater; the water inlet 51 can be connected to the water outlet pipe 4; the drain 53 can be connected to the water inlet pipe 3; and a method for controlling the drain 53 to be connected to the water inlet pipe 3 The first valve element 64 is in a first state, and the second valve element 65 is used to control the communication state of the water inlet 51 and the water outlet pipe 4. The first valve element 64 has a first state for connecting the drain port 53 with the water inlet pipe 3 and a second state for blocking the drain port 53 from the water inlet pipe 3. The second valve element 65 has a third state for connecting the water inlet 51 with the water outlet pipe 4 and a fourth state for blocking the water inlet 51 from the water outlet pipe 4. When the first valve element 64 is in the first state and the second valve element 65 is in the third state, the water in the inner tank 1 is discharged to the outside of the water heater through the water inlet pipe 3 and the drain port 53, and the water in the water supply pipeline enters the inner tank 1 through the water inlet 51 and the water outlet pipe 4.

[0166] Among them, the water heater provided in the embodiment of the present application mainly includes: an inner tank 1, a heating element 2, a water inlet pipe 3, a water outlet pipe 4, a water inlet 51, a water outlet 52, a drain 53, a first valve element 64 and a second valve element 65, etc.

[0167] In these embodiments, the specific functions and structures of the inner tank 1, the heating element 2, the water inlet pipe 3, the water outlet pipe 4, the water inlet 51, the water outlet 52, the drain port 53, etc. can be referred to. Figures 1 to 9 The specific descriptions of the first to ninth embodiments described above will not be elaborated in detail in this application.

[0168] The main difference from the above embodiment is that when the water in the inner tank 1 is renewed, the connection relationship of the water path is different from that in the above embodiment.

[0169] In the embodiment of the present application, the water heater is provided with a first valve element 64 and a second valve element 65. When the water in the inner tank 1 is renewed, the new water flowing in from the water inlet 51 enters the inner tank 1 through the water outlet 4, and then is discharged outward through the water inlet 3 and the drain 53.

[0170] Specifically, the water inlet 51 can be communicated with the water outlet 4; the drain port 53 can be communicated with the water inlet 3. The first valve element 64 is used to control the communication state of the drain port 53 and the water inlet 3. The second valve element 65 is used to control the communication state of the water inlet 51 and the water outlet 4. The first valve element 64 has a first state of connecting the drain port 53 with the water inlet 3 and a second state of blocking the drain port 53 from the water inlet 3. The second valve element 65 has a third state of connecting the water inlet 51 with the water outlet 4 and a fourth state of blocking the water inlet 51 from the water outlet 4. When the first valve element 64 is in the first state and the second valve element 65 is in the third state, the water in the inner tank 1 is discharged to the outside of the water heater through the water inlet 3 and the drain port 53, and the water in the water supply pipeline enters the inner tank 1 through the water inlet 51 and the water outlet 4.

[0171] In one embodiment, the water heater has a drainage channel 7 , and the drainage port 53 is connected to the drainage channel 7 or the drainage port 53 is disposed at the end of the drainage channel 7 .

[0172] In this embodiment, the water heater may have a drainage channel 7, which is mainly used to drain the water to be discharged from the inner tank 1 to a designated location, such as a downpipe, a floor drain, etc. The drain port 53 may be an opening (not shown in the figure) on the second channel 55 provided between the water inlet pipe 3 and the water inlet 51. The drainage channel 7 may be connected to the drain port 53 of the water heater, and the drainage channel 7 may be a detachable pipe. In the direction of water flow, an inlet is formed at the head end of the drainage channel 7, and the inlet may be connected to the drain port 53 of the water heater. An outlet is formed at the end of the drainage channel 7, and the position of the outlet may be positioned accordingly according to the position where the user can drain the water.

[0173] Or, if Fig.10 As shown, the drainage channel 7 can maintain a connection with the water heater, wherein the drainage port 53 can be provided at the end of the drainage channel 7. When the water in the inner tank 1 needs to be renewed, the water in the inner tank 1 can pass through the water outlet pipe 4 and the drainage channel 7 and be discharged outward through the drainage port 53.

[0174] See also Fig.10 , Fig.11 or Fig.13 In some embodiments, the inlet of the drainage channel 7 is connected to the water inlet pipe 3 , and the first valve element 64 may be a first switch valve disposed on the drainage channel 7 .

[0175] In this embodiment, the first valve element 64 can be in the form of a switch valve, and the switch valve can be a normally closed solenoid valve, or the switch valve can be in other forms.

[0176] When the drain outlet 53 is arranged at the end of the drain channel 7, when the water in the inner tank 1 needs to be renewed, the first switch valve is switched from the open state to the closed state, so that the drain outlet 53 can be connected with the water inlet pipe 3, and the water in the inner tank 1 can be discharged outward through the water inlet pipe 3, the drain channel 7 and the drain outlet 53.

[0177] In which, the water heater can be provided with a controller, and the first switch valve can be electrically connected to the controller. When the water in the inner tank 1 needs to be updated, the corresponding control instruction is sent to the switch valve 61 through the controller to change the state of the first switch valve, that is, the first switch valve is switched from an open state to a closed state, and at the same time, the second valve element 65 is controlled to connect the water inlet 51 with the water outlet pipe 4. The water in the water supply pipeline can be supplied into the inner tank 1 through the water inlet 51 and the water outlet pipe 4, so that the water in the inner tank 1 can be updated. The operation is convenient as a whole, which is conducive to improving the user experience.

[0178] Furthermore, the inlet of the drainage channel 7 is connected to the second channel 55 between the water inlet pipe 3 and the water inlet 51 .

[0179] In this embodiment, a second channel 55 is provided outside the inner tank 1, and the water inlet pipe 3 and the water inlet 51 can be connected through the second channel 55. Specifically, the second channel 55 can be in the form of a hollow pipe, or in the form of a flow channel provided inside the water channel module 9. Of course, the specific form of the second channel 55 is not limited to the above examples, and those skilled in the art will not make specific limitations here.

[0180] like Fig.12 As shown, in the twelfth embodiment, the first valve element 64 is a first switching valve arranged on the second channel 55 between the water inlet pipe 3 and the water inlet 51, and when the first switching valve is in a first state, the drainage channel 7 is connected to the water inlet pipe 3, and when the first switching valve is in a second state, the drainage channel 7 is blocked from the water inlet pipe 3.

[0181] In this embodiment, a first switching valve can be set on the second channel 55, and the first switching valve includes at least two states (a first state and a second state). When the first switching valve is in the first state, the drainage channel 7 can be connected to the water inlet pipe 3, and the water to be updated in the inner tank 1 can be discharged outward through the water inlet pipe 3 and the drainage channel 7; when the first switching valve is in the second state, the drainage channel 7 can be blocked from the water outlet pipe 4 to ensure that the water in the inner tank 1 can be supplied to the user through the water outlet pipe 4 and the water outlet 52.

[0182] Specifically, the first switching valve can be a three-way switching valve, which has a first interface connected to the water inlet pipe 3 and receiving water flowing out of the water inlet pipe 3, a second interface connected to the water inlet 51 and receiving water flowing into the water inlet 51, and a third interface connected to the drainage channel 7 and delivering water to the drainage channel 7; when the first switching valve is in a first state, the first interface and the third interface are connected, and the first interface and the second interface are in a blocked state, and when the first switching valve is in a second state, the first interface and the second interface are connected.

[0183] The specific structure of the three-way switching valve can be found in the attached Figure 2A The specific description of the three-way switching valve in the above-mentioned second embodiment will not be elaborated in this application.

[0184] like Figures 10 to 13 As shown, in some embodiments, the water heater also has a three-way pressure relief valve arranged between the water inlet 51 and the water inlet pipe 3, the pressure relief valve 63 has a water inlet channel and a pressure relief channel 632, the pressure relief channel 632 has a discharge port 6320, the water inlet channel is used to connect the water inlet 51 and the water inlet pipe 3, the pressure relief channel 632 is used to connect the water inlet pipe 3 with the discharge port 6320 when the pressure in the inner tank 1 is greater than a preset pressure, the drain port 53 is connected to the discharge port 6320, or the drain port 53 and the discharge port 6320 can be connected.

[0185] For the water heater, its inner tank 1 is under pressure in the working state, and when the pressure in the inner tank 1 exceeds the preset pressure, the pressure in the inner tank 1 can be released to the outside through the pressure relief valve 63. Among them, the preset pressure is the standard pressure to ensure the safe and reliable operation of the inner tank 1.

[0186] In the embodiment of the present application, the structure of the pressure relief valve 63 can be utilized to implement the operation of refreshing the water in the inner tank 1 by utilizing the pressure relief channel 632 of the pressure relief valve 63 .

[0187] Specifically, the pressure relief valve 63 may be a three-way pressure relief valve disposed between the water inlet 51 and the water inlet pipe 3, and the pressure relief valve 63 has a water inlet channel and a pressure relief channel 632. The water inlet channel is used to connect the water inlet 51 and the water inlet pipe 3, ensuring that the water flowing into the water inlet 51 can be supplied to the inner tank 1 through the water inlet pipe 3. Along the water flow direction, the end of the pressure relief channel 632 may be a discharge port 6320. When the pressure in the inner tank 1 is greater than the preset pressure, the water inlet pipe 3 may be connected to the water inlet pipe 3 and the drain port 53, so that the excessive pressure in the inner tank 1 is discharged to the outside through the drain port 53.

[0188] like Fig.10 As shown, for the embodiment in which the drain port 53 is arranged at the end of the drain channel 7, the drain port 53 can be directly connected to the pressure relief channel 632, as shown in FIG. Fig.11 As shown, the drain outlet 53 is always connected to the discharge outlet 6320.

[0189] The drain port 53 may be an opening disposed on the second channel 55 (not shown in the figure). When the first valve element 64 is in the first state, the drain port 53 is communicated with the discharge port 6320 .

[0190] The first valve element 64 may be electrically connected to a controller, and when the water in the inner tank 1 needs to be renewed, the controller may control the first valve element 64 to be in the first state.

[0191] In some embodiments, the water heater is provided with a bypass channel 71 connecting the water inlet 51 with the water outlet pipe 4, one end of the bypass channel 71 is connected to the second channel 55 between the water inlet 51 and the water inlet pipe 3, and the other end of the bypass channel 71 is connected to the first channel 54 between the water outlet 52 and the water outlet pipe 4.

[0192] The bypass channel 71 may be in the form of a hollow tube. Of course, the bypass channel 71 may also be a hollow channel integrated in the water channel module 9. The bypass channel 71 may be used to connect the first channel 54 and the second channel 55.

[0193] See also Fig.14 In the fourteenth embodiment, the second valve element 65 can be a second switch valve arranged on the bypass channel 71. When the second switch valve is in a closed third state, the water inlet 51 is connected to the water outlet pipe 4. When the second switch valve is in a disconnected fourth state, the water inlet 51 and the water outlet pipe 4 are in a blocked state.

[0194] When the second valve element 65 is in the form of a second switch valve, the second switch valve may specifically be a normally closed solenoid valve, or the second switch valve may also be in other forms.

[0195] When the water in the inner tank 1 needs to be renewed, the second switch valve is switched from the open state to the closed state, thereby connecting the water inlet 51 with the water outlet pipe 4, and further allowing the water supplied to the water inlet 51 from the outside to be supplied to the inner tank 1 through the bypass channel 71 and the water outlet pipe 4.

[0196] In which, the water heater can be provided with a controller, and the first valve element and the second switch valve can be electrically connected to the controller. When the water in the inner tank 1 needs to be updated, the controller sends corresponding control instructions to the first valve element and the second switch valve to control the first valve element so that the water inlet 51 is connected to the water outlet pipe 4, and at the same time, the state of the second switch valve is switched, that is, the second switch valve is switched from an open state to a closed state, thereby realizing the update of the water in the inner tank 1. The operation is convenient as a whole, which is conducive to improving the user experience.

[0197] like Fig.12 As shown, in the twelfth embodiment, the second valve element 65 is a second switching valve arranged on the second channel 55 between the water inlet pipe 3 and the water inlet 51, and when the second switching valve is in the third state, the water inlet 51 is connected to the water outlet pipe 4, and when the second switching valve is in the fourth state, the water inlet 51 is blocked from the water outlet pipe 4.

[0198] Specifically, the second switching valve can be a three-way switching valve, which has a first connecting port connected to the water inlet 51 and receiving water flowing out of the water supply pipeline, a second connecting port connected to the water inlet pipe 3 and supplying water to the water inlet pipe 3, and a third connecting port connected to the bypass flow channel 71 and supplying water to the bypass flow channel 71; when the second switching valve is in the third state, the first connecting port and the third connecting port are connected, and the first connecting port and the second connecting port are in a blocked state; when the second switching valve is in the fourth state, the first connecting port and the second connecting port are connected.

[0199] like Fig.13As shown, in the thirteenth embodiment, the second valve element 65 is a second switching valve arranged on the first channel 54 between the water outlet pipe 4 and the water outlet 52, and the water heater also includes a third valve element 66 for controlling the connection state between the water inlet 51 and the inner tank 1. When the second switching valve is in the third state, the water inlet 51 is connected to the water outlet pipe 4, the third valve element 66 is in a disconnected state, and the water inlet 51 is not connected to the inner tank 1; when the second switching valve is in the fourth state, the water inlet 51 is blocked from the water outlet pipe 4, the third valve element 66 is in a closed state, and the water inlet 51 is connected to the inner tank 1.

[0200] When the third valve element 66 is in the form of a switch valve, the third valve element 66 may specifically be a normally open solenoid valve, or the third valve element 66 may also be in other forms.

[0201] Among them, the second switching valve can be a three-way switching valve, which has a first connecting port connected to the water outlet pipe 4 and supplies water to the water outlet pipe 4, a second connecting port connected to the water outlet 52 and supplies water to the water outlet 52, and a third connecting port connected to the bypass flow channel 71 and receives water flowing out of the bypass flow channel 71; when the second switching valve is in the third state, the first connecting port and the third connecting port are connected, and the first connecting port and the second connecting port are in a blocked state, and when the second switching valve is in the fourth state, the first connecting port is connected to the second connecting port.

[0202] The specific structure of the three-way switching valve can be found in the attached Figure 2A The specific description of the three-way switching valve in the above-mentioned second embodiment will not be elaborated in this application.

[0203] The third valve element 66 and the second valve element 65 can be electrically connected to the controller. When the water in the inner tank 1 needs to be updated, the controller can control the second valve element 65 to be in the third state and control the third valve element 66 to be in the disconnected state.

[0204] In some embodiments of the present application, the water heater has a normal water use mode and a running water mode. In the normal water use mode, the water outlet pipe 4 is connected to the water outlet 52, and the drain port 53 is blocked from the water outlet pipe 4. The water entering from the water inlet 51 enters the inner tank 1 through the water inlet pipe 3, and the water in the inner tank 1 flows to the water use point through the water outlet pipe 4 and the water outlet 52. In the running water mode, the water inlet pipe 3 is connected to the drain port 53, and the water entering from the water inlet 51 enters the inner tank 1 through the water outlet pipe 4, and the water in the inner tank 1 is discharged to the outside of the water heater through the water inlet pipe 3 and the drain port 53.

[0205] In this embodiment, the water heater includes a normal water mode and a running water mode. The running water mode is set for the scenario where the water in the inner tank 1 needs to be updated. When the water in the inner tank 1 needs to be updated, the water heater can enter the running water mode to automatically update the water in the inner tank 1, thereby improving the convenience and intelligence of updating the water in the inner tank 1 and improving the user experience.

[0206] Specifically, in the normal water use mode, the water outlet pipe 4 and the water outlet 52 are in a connected state, the drain port 53 and the water outlet pipe 4 are in a blocked state, the water entering from the water inlet 51 enters the inner tank 1 through the water inlet pipe 3, and the water in the inner tank 1 flows to the water use point through the water outlet pipe 4 and the water outlet 52.

[0207] In the active water mode, the water inlet pipe 3 and the drain port 53 are in a connected state, the water entering from the water inlet 51 enters the inner tank 1 through the water outlet pipe 4, and the water in the inner tank 1 is discharged to the outside of the water heater through the water inlet pipe 3 and the drain port 53, thereby refreshing the water in the inner tank 1 and preventing the water in the inner tank 1 from standing for a long time, breeding bacteria and generating odor.

[0208] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0209] The above-mentioned various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0210] The above are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention, but the scope of patent protection of the present invention shall still be subject to the scope defined by the attached claims.

Claims

1. A water heater, characterized in that: The water heater comprises: An inner tank for holding water; A heating element disposed on the inner tank for heating water in the inner tank; The inner tank is provided with a water inlet pipe and a water outlet pipe extending into the inner tank; The water heater has a water inlet, a water outlet, and a drain, wherein the water inlet is used to allow water in the water supply pipeline to enter the water heater, the water outlet is used to output the water in the inner tank to a water point, and the drain is used to drain the water in the inner tank to the outside of the water heater; The water inlet is connected to the water inlet pipe; The water outlet can be communicated with the water outlet pipe; The drain port can be connected to the water outlet pipe; A valve element is used to control the connection state between the drain port and the water outlet pipe, the valve element has a first state in which the drain port is connected to the water outlet pipe and a second state in which the drain port is blocked from the water outlet pipe. When the valve element is in the first state, the water in the inner tank is discharged to the outside of the water heater through the water outlet pipe and the drain port, and the water in the water supply pipeline enters the inner tank through the water inlet and the water inlet pipe.

2. The water heater according to claim 1, characterized in that: The water heater has a drainage channel, and the drainage port is connected to the drainage channel or the drainage port is arranged at the end of the drainage channel.

3. The water heater according to claim 2, characterized in that: The inlet of the drainage channel is communicated with the water outlet pipe, and the valve element is a switch valve arranged on the drainage channel.

4. The water heater according to claim 3, characterized in that: The inlet of the drainage channel is connected to the first channel between the water outlet pipe and the water outlet.

5. The water heater according to claim 2, characterized in that: The valve element is a switching valve arranged on the first channel between the water outlet pipe and the water outlet. When the switching valve is in a first state, the drainage channel is connected to the water outlet pipe. When the switching valve is in a second state, the drainage channel is blocked from the water outlet pipe.

6. The water heater according to claim 5, characterized in that The switching valve is a three-way switching valve, which has a first interface connected to the water outlet pipe and receiving water flowing out of the water outlet pipe, a second interface connected to the water outlet and supplying water to the water outlet, and a third interface connected to the drainage channel and supplying water to the drainage channel; when the switching valve is in a first state, the first interface is connected to the third interface, and when the switching valve is in a second state, the first interface is connected to the second interface.

7. The water heater according to claim 2, characterized in that: The water heater also has a three-way pressure relief valve arranged between the water inlet and the water inlet pipe, the pressure relief valve has a water inlet channel and a pressure relief channel, the pressure relief channel has a discharge port, the water inlet channel is used to connect the water inlet and the water inlet pipe, the pressure relief channel is used to connect the water inlet pipe with the discharge port when the pressure in the inner tank is greater than a preset pressure, the drain port is connected to the discharge port, or the drain port and the discharge port can be connected.

8. The water heater according to claim 1, characterized in that The water heater further comprises a scale inhibition unit and / or a filter unit, and the scale inhibition unit and / or the filter unit are used for purifying the water flowing out of the water inlet pipe.

9. The water heater according to claim 8, characterized in that The scale inhibition unit and / or the filter unit are arranged on the water inlet pipe and located in the inner tank, and at least part of the water flowing out of the water inlet pipe enters the inner tank through the scale inhibition unit and / or the filter unit.

10. The water heater according to claim 1, characterized in that The water heater further comprises a filtering structure, and the filtering structure is arranged on a flow passage between the water outlet pipe and the valve element.

11. The water heater according to claim 2, characterized in that: The water heater further comprises a water channel module, and the valve element and the drainage channel are both integrated on the water channel module.

12. The water heater according to claim 1, characterized in that The water heater further comprises a controller and a detection unit electrically connected to the controller, wherein the detection unit comprises any one of the following or a combination thereof: a temperature detection element, a flow detection element, and a pressure detection element.

13. The water heater according to claim 1, characterized in that The water heater also includes a controller and a communication module electrically connected to the controller, and the controller can transmit signals to the user's APP through the communication module.

14. The water heater according to any one of claims 1 to 13, characterized in that: The inner pot includes a first inner pot and a second inner pot arranged in sequence along the height direction, the first inner pot is connected to the second inner pot, the water inlet pipe is provided with a first water inlet and a first water outlet, the water outlet pipe is provided with a second water inlet and a second water outlet, the water outlet pipe passes through the first inner pot and extends into the second inner pot, the first water outlet is located in the first inner pot, and the second water inlet is located in the second inner pot.

15. The water heater according to claim 1, characterized in that The water heater has a normal water use mode and a running water mode. In the normal water use mode, the water outlet pipe and the water outlet are in a connected state, the drain port and the water outlet pipe are in a blocked state, the water entering from the water inlet enters the inner tank through the water inlet pipe, and the water in the inner tank flows to the water use point through the water outlet pipe and the water outlet; in the running water mode, the water outlet pipe and the drain port are in a connected state, the water entering from the water inlet enters the inner tank through the water inlet pipe, and the water in the inner tank is discharged to the outside of the water heater through the water outlet pipe and the drain port.

16. A water heater, characterized in that: The water heater comprises: An inner tank for holding water; A heating element disposed on the inner tank for heating water in the inner tank; The inner tank is provided with a water inlet pipe and a water outlet pipe extending into the inner tank; The water heater has a water inlet, a water outlet, and a drain, wherein the water inlet is used to allow water in the water supply pipeline to enter the water heater, the water outlet is used to output the water in the inner tank to a water point, and the drain is used to drain the water in the inner tank to the outside of the water heater; The water inlet can be connected to the water outlet pipe; The drain port can be connected to the water inlet pipe; a first valve element for controlling the communication state between the drain port and the water inlet pipe, a second valve element for controlling the communication state between the water inlet and the water outlet pipe, The first valve element has a first state in which the drain port is connected to the water inlet pipe and a second state in which the drain port is blocked from the water inlet pipe. The second valve element has a third state in which the water inlet is connected to the water outlet pipe and a fourth state in which the water inlet is blocked from the water outlet pipe. When the first valve element is in the first state and the second valve element is in the third state, the water in the inner tank is discharged to the outside of the water heater through the water inlet pipe and the drain port, and the water in the water supply pipeline enters the inner tank through the water inlet and the water outlet pipe.

17. The water heater according to claim 16, characterized in that: The water heater has a drainage channel, and the drainage port is connected to the drainage channel or the drainage port is arranged at the end of the drainage channel.

18. The water heater according to claim 17, characterized in that: The inlet of the drainage channel is communicated with the water inlet pipe, and the first valve element is a first switch valve arranged on the drainage channel.

19. The water heater according to claim 18, characterized in that The inlet of the drainage channel is connected to a second channel between the water inlet pipe and the water inlet.

20. The water heater according to claim 17, characterized in that The first valve element is a first switching valve arranged on the second channel between the water inlet pipe and the water inlet. When the first switching valve is in a first state, the drainage channel is connected to the water inlet pipe. When the first switching valve is in a second state, the drainage channel is blocked from the water inlet pipe.

21. The water heater according to claim 20, characterized in that The first switching valve is a three-way switching valve, which has a first interface connected to the water inlet pipe and receiving water flowing out of the water inlet pipe, a second interface connected to the water inlet and receiving water flowing into the water inlet, and a third interface connected to the drainage channel and delivering water to the drainage channel; when the first switching valve is in a first state, the first interface and the third interface are connected, and the first interface and the second interface are in a blocked state, and when the first switching valve is in a second state, the first interface and the second interface are connected.

22. The water heater according to claim 17, characterized in that The water heater also has a three-way pressure relief valve arranged between the water inlet and the water inlet pipe, the pressure relief valve has a water inlet channel and a pressure relief channel, the pressure relief channel has a discharge port, the water inlet channel is used to connect the water inlet and the water inlet pipe, the pressure relief channel is used to connect the water inlet pipe with the discharge port when the pressure in the inner tank is greater than a preset pressure, the drain port is connected to the discharge port, or the drain port and the discharge port can be connected.

23. The water heater according to claim 17, characterized in that The water heater is provided with a bypass channel connecting the water inlet with the water outlet pipe, one end of the bypass channel is connected to the second channel between the water inlet and the water inlet pipe, and the other end of the bypass channel is connected to the first channel between the water outlet and the water outlet pipe.

24. The water heater according to claim 23, characterized in that The second valve element is a second switch valve arranged on the bypass flow channel. When the second switch valve is in a closed third state, the water inlet is connected to the water outlet pipe. When the second switch valve is in a disconnected fourth state, the water inlet and the water outlet pipe are in a blocked state.

25. The water heater according to claim 23, characterized in that The second valve element is a second switching valve disposed on a second channel between the water inlet pipe and the water inlet. When the second switching valve is in the third state, the water inlet is connected to the water outlet pipe, and when the second switching valve is in the fourth state, the water inlet is blocked from the water outlet pipe.

26. The water heater according to claim 25, characterized in that The second switching valve is a three-way switching valve. The three-way switching valve has a first connecting port connected to the water inlet and receiving water flowing out of the water supply pipe, a second connecting port connected to the water inlet pipe and supplying water to the water inlet pipe, and a third connecting port connected to the bypass flow channel and supplying water to the bypass flow channel; when the second switching valve is in the third state, the first connecting port and the third connecting port are connected, and the first connecting port and the second connecting port are in a blocked state; when the second switching valve is in the fourth state, the first connecting port and the second connecting port are connected.

27. The water heater according to claim 23, characterized in that The second valve element is a second switching valve disposed on the first channel between the water outlet pipe and the water outlet, and the water heater further comprises a third valve element for controlling the communication state between the water inlet and the inner tank. When the second switching valve is in the third state, the water inlet is connected to the water outlet pipe, the third valve element is in the disconnected state, and the water inlet is not connected to the inner tank; when the second switching valve is in the fourth state, the water inlet is blocked from the water outlet pipe, the third valve element is in the closed state, and the water inlet is connected to the inner tank.

28. The water heater according to claim 27, characterized in that The second switching valve is a three-way switching valve. The three-way switching valve comprises a first connecting port connected to the water outlet pipe and supplying water to the water outlet pipe, a second connecting port connected to the water outlet and supplying water to the water outlet, and a third connecting port connected to the bypass flow channel and receiving water flowing out of the bypass flow channel; when the second switching valve is in the third state, the first connecting port and the third connecting port are connected, and the first connecting port and the second connecting port are in a blocked state; when the second switching valve is in the fourth state, the first connecting port and the second connecting port are connected.

29. The water heater according to claim 16, characterized in that The water heater has a normal water use mode and a running water mode. In the normal water use mode, the water outlet pipe and the water outlet are in a connected state, the drain port and the water outlet pipe are in a blocked state, the water entering from the water inlet enters the inner tank through the water inlet pipe, and the water in the inner tank flows to the water use point through the water outlet pipe and the water outlet; in the running water mode, the water inlet pipe and the drain port are in a connected state, the water entering from the water inlet enters the inner tank through the water outlet pipe, and the water in the inner tank is discharged to the outside of the water heater through the water inlet pipe and the drain port.

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