Water heater

Abstract

The utility model relates to a water heater, it includes shell, heating pipeline and water delivery pipeline, the shell includes the week side casing, first end cover and second end cover, first end cover and second end cover respectively form first water group and second water group, heating pipeline both ends are connected between first water group and second water group respectively, and heating pipeline is provided with heating part in, water delivery pipeline both ends are connected between first water group and second water group respectively, heating part in heating pipeline heats the water in heating pipeline, and passes on the heat to the heat exchange inner chamber, when using water, low temperature water is delivered to the water delivery pipeline, and the heat in the heat exchange inner chamber is passed to the low temperature water in the water delivery pipeline, and the low temperature water is heated, and the water in the water delivery pipeline realizes secondary heating before output, guarantees the water temperature, satisfies the immediate water demand of user.

Description

Technical Field

[0001] This utility model belongs to the field of household appliance technology, and in particular relates to a water heater. Background Technology

[0002] Most existing water heaters use a storage-type heating method to heat water. Storage-type phase change water heaters heat water by exchanging heat between a heating element and a phase change material. A phase change water heater mainly consists of an inner tank filled with phase change material, and a heating element installed within the inner tank. The heating element heats the phase change material, storing energy. When water is used, the low-temperature water in the inner tank is heated by the phase change material to become high-temperature water, which is then delivered to the user.

[0003] Existing phase change water heaters directly heat the phase change material through a heating element. This results in slow heating speed, poor immediacy, uneven heating, unstable water temperature, and a poor user experience. Utility Model Content

[0004] The purpose of this utility model is to provide a water heater that solves the problems of existing phase change water heaters where the heating element directly heats the phase change material, resulting in slow water temperature rise, poor immediacy, and uneven heating.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] This utility model discloses a water heater, which includes:

[0007] The outer shell has a heat exchange cavity formed therein. The outer shell includes a peripheral shell and a first end cover and a second end cover disposed at both ends of the peripheral shell. A first water passage group and a second water passage group are respectively formed on the first end cover and the second end cover.

[0008] A heating pipe is connected at both ends between the first water flow group and the second water flow group, and a heating element is installed inside the heating pipe.

[0009] The water supply pipeline has its two ends connected between the first water flow group and the second water flow group, respectively;

[0010] Wherein, the first water-passing group is used to connect different water supply pipelines; the second water-passing group is used to connect different water supply pipelines, and / or, the second water-passing group is used to connect the corresponding water supply pipeline to the heating pipeline.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are:

[0012] The water heater involved in this application has some water supply pipes connected in series and connected to the heating pipe. The heating element in the heating pipe heats the water in the heating pipe and transfers the heat to the heat exchange chamber. When water is used, low-temperature water is supplied to the water supply pipe. The heat in the heat exchange chamber is transferred to the low-temperature water in the water supply pipe, heating the low-temperature water. Before being output, the water in the water supply pipe undergoes secondary heating in the heating pipe to ensure the water temperature and meet the user's immediate water needs.

[0013] In some embodiments of this application, the diameter of the heating pipe is larger than that of the water supply pipe, and the water inlet pipe is connected to at least one of the water supply pipes;

[0014] The first end of the heating pipe is connected to the outlet water pipe, and the second end of the heating pipe is connected to at least two corresponding water supply pipes through the second water flow group.

[0015] The heating pipes have a large diameter to accommodate the installation of heating elements and increase the internal water capacity. When the heating pipes are connected to two or more water supply pipes as needed, the heating efficiency can be improved.

[0016] In some embodiments of this application, the first water-passing group includes a plurality of first water-passing cavities, the first water-passing cavities being used to connect the first ends of the two water supply pipelines;

[0017] The second water passage group includes a water collection chamber and multiple second water passage chambers. The second water passage chambers are used to connect the second ends of the two water supply pipes, and the water collection chambers are used to connect the corresponding water supply pipes and the heating pipes.

[0018] The first ends of the two water supply pipes connected to the same first water passage are respectively connected to different second water passages, so that the water flow input from the inlet pipe is delivered to the heating pipe after passing through different water supply pipes, and finally output from the outlet pipe.

[0019] The first water passage chamber is used to connect the first ends of the parallel water supply pipelines. Water in one water supply pipeline passes through the first water passage chamber and is then transported to the first end of another water supply pipeline, thus achieving water connection between different water supply pipelines. Similarly, the second water passage chamber is used to connect the second ends of the parallel water supply pipelines. Water in one water supply pipeline passes through the second water passage chamber and is then transported to the second end of another water supply pipeline, so that the water flows back and forth between the first end cap and the second end cap, circulating for heating and improving the heating effect.

[0020] In some embodiments of this application, the first end cap includes a first inner shell and a first outer shell. The first inner shell is located on the side close to the peripheral sidewall. An inwardly recessed portion is formed on the first inner shell, extending toward the peripheral sidewall. An outwardly recessed portion is formed on the first outer shell, extending away from the peripheral sidewall. The first water passage cavity is formed between the corresponding inwardly recessed portion and the outwardly recessed portion.

[0021] The first water passage cavity is formed between the inner and outer recesses of the first end cap, which can increase the water passage volume of the first water passage cavity, make the water flow smoother during the flow process, reduce water flow resistance, and reduce noise.

[0022] In some embodiments of this application, the second end cap includes a second inner shell and a second outer shell. The second inner shell is located on the side close to the peripheral sidewall. An inwardly recessed portion is formed on the second inner shell, extending toward the peripheral sidewall. An outwardly recessed portion is formed on the second outer shell, extending away from the peripheral sidewall. The second water passage cavity and the water collection cavity are formed between the corresponding inwardly recessed portion and the outwardly recessed portion.

[0023] The inner and outer recesses of the second end cap form a second water passage cavity and a water collection cavity, which helps to increase the water passage volume of the second water passage cavity. The water flows more smoothly in the second water passage cavity and water collection cavity, reducing water flow resistance and noise.

[0024] In some embodiments of this application, a mounting portion is detachably connected to the outer side of the first end cap. The mounting portion is provided with a water inlet port and a water outlet port. The water inlet port is located above the water outlet port. The water inlet port is used to connect to a water inlet pipe, and the water outlet port is used to connect to a water outlet pipe.

[0025] Because the first and second end caps are relatively thin, their connection stability with the working components such as the water inlet pipe, water outlet pipe, and heating element is poor. The mounting part provides a mounting base for the water inlet port and water outlet port, thus ensuring a stable connection.

[0026] In some embodiments of this application, a water distribution cavity is formed between the mounting part and the first end cover, the water inlet port is connected to the water distribution cavity, and the two water supply pipes directly connected to the water inlet port pass through the first end cover and are connected to the water distribution cavity, so that the water flow input from the water inlet port is diverted to different water supply pipes.

[0027] The water distribution chamber is formed between the mounting section and the first end cover, which helps to reduce the weight of the mounting section while ensuring its thickness and making full use of the space of the mounting section. The water distribution chamber connects the water inlet port to different water supply pipelines, which can realize the simultaneous delivery of multiple water channels and improve the heat exchange effect with the heat exchange inner cavity.

[0028] In some embodiments of this application, the axes of the water outlet port and the heating pipe do not coincide, and a manifold is formed between the mounting part and the second end cap, the manifold being used to connect the first end of the heating pipe and the water outlet port.

[0029] A heating element is installed inside the heating pipe. The heating element is coaxial with the heating pipe and is directly connected to the mounting part. The water outlet is offset from the heating pipe in the mounting part to avoid interference with the heating element and facilitate assembly.

[0030] In some embodiments of this application, the outer shell is made of stainless steel or copper plate, and the first end cap, the second end cap, and the peripheral shell are connected and fixed by welding.

[0031] In some embodiments of this application, a temperature measuring element is provided on the first end cap, and the temperature measuring element extends into the heat exchange cavity.

[0032] The temperature sensor is used to detect the temperature of the phase change material filled in the heat exchange cavity. When the temperature sensor detects that the temperature of the phase change material has reached the preset temperature, the heating element is turned off to stop heating and achieve the purpose of temperature control.

[0033] In some embodiments of this application, the second end cap is provided with an injection port for filling the heat exchange cavity with phase change material, and a sealing member is detachably connected to the injection port.

[0034] In some embodiments of this application, a plurality of heat exchange fins are provided at intervals along the axial direction perpendicular to the water supply pipeline in the heat exchange cavity.

[0035] The heat exchange fins are provided with through connection ports for water supply pipes and heating pipes to pass through. The heat in the heating pipes is transferred to the water supply pipes through the heat exchange fins and the phase change material in the heat exchange cavity.

[0036] In some embodiments of this application, the mounting portion and the first end cap are further provided with through-holes, and the mounting portion has a threaded hole inside the through-hole, and the fixed end of the heating element is threadedly connected to the mounting portion.

[0037] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is an appearance drawing of the water heater proposed in this utility model;

[0040] Figure 2 This is an exploded view of the water heater proposed in this utility model;

[0041] Figure 3 This is an internal diagram of the water heater proposed in this utility model;

[0042] Figure 4 This is the structural diagram of the first end cap;

[0043] Figure 5 This is a diagram showing the disassembled first end cap;

[0044] Figure 6 This is a structural diagram of the installation section;

[0045] Figure 7 This is a structural diagram of the second end cap;

[0046] Figure 8 This is a diagram showing the disassembled second end cap;

[0047] Figure 9 This is a schematic diagram of water flow inside the water heater;

[0048] In the picture,

[0049] 100. Outer shell; 110. Peripheral shell; 120. First end cap; 121. First inner shell; 122. First outer shell; 130. Second end cap; 131. Second inner shell; 132. Second outer shell; 133. Inlet; 140. Mounting part; 141. Water distribution chamber; 142. Manifold; 150. Temperature measuring element;

[0050] 200. Water supply pipeline; 201. First end; 202. Second end;

[0051] 301. Inner concave portion; 302. Outer concave portion; 310. First water passage cavity; 320. Second water passage cavity; 330. Water collection cavity;

[0052] 400. Heating pipes; 410. Heating element;

[0053] 500, Water inlet port;

[0054] 600, Water outlet port. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0056] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0060] refer to Figures 1-3 This utility model proposes a water heater, which includes an outer shell 100, a heating pipe 400 disposed inside the outer shell 100, and a water supply pipe 200.

[0061] Specifically, the outer shell 100 includes a peripheral shell 110 and a first end cap 120 and a second end cap 130 disposed at both ends of the peripheral shell 110. The peripheral shell 110, the first end cap 120 and the second end cap 130 form a heating cavity, and the heating pipe 400 and the water supply pipe 200 are disposed in the heating cavity.

[0062] The water heater involved in this application is a storage-type phase change water heater. In addition to the heating pipe 400 and the water supply pipe 200, the water heater is also equipped with a heating element 410, heat exchange fins (not shown) and phase change material.

[0063] The heating element 410 involved in this application is disposed in the heating pipe 400 for directly heating the water in the heating pipe 400. In addition, the heat generated by the heating element 410 is also transported through the heating pipe 400 to the heat exchange fins and phase change material for heating the water flow in the water supply pipe 200.

[0064] A first water-passing group and a second water-passing group are respectively formed on the first end cap 120 and the second end cap 130. The first water-passing group and the second water-passing group are used to realize the transfer between different water supply pipelines 200 or to realize the transfer between the heating pipeline 400 and the corresponding water supply pipeline 200.

[0065] Specifically, the two ends of the heating pipe 400 are connected between the first water flow group and the second water flow group, respectively. One end of the heating pipe 400 is connected to the water supply pipe 200, and the other end is connected to the water outlet pipe for output to the end of the water supply.

[0066] The two ends of the water supply pipeline 200 are respectively connected between the first water flow group and the second water flow group. Multiple water supply pipelines 200 are provided in the heat exchange cavity. The water supply pipelines 200 are connected in series through the first water flow group and the second water flow group to form a circulating water circuit, which absorbs the heat from the heat exchange fins and phase change material to heat the water in the water supply pipeline 200.

[0067] In some embodiments, the heat exchange cavity includes a circulating water path, with an inlet water pipe connected to a delivery water pipe 200 to form a circulating water path. The various delivery water pipes 200 in the heat exchange cavity are connected in series. Low-temperature water input from the inlet water pipe passes through each delivery water pipe 200 in sequence under the connection of the first water passing assembly and the second water passing assembly. The water absorbs heat from the heat exchange fins and phase change material in the delivery water pipes 200, and is finally reheated by the heating element 410 after passing through the heating pipe 400 before being output.

[0068] The first water passage group includes multiple water passage cavities formed in the first end cap 120, and the second water passage group includes multiple water passage cavities formed in the second end cap 130. The water passage cavities are connected to different water supply pipelines 200, and the other ends of the two water supply pipelines 200 connected to the same water passage cavity are respectively connected to different water passage cavities, so as to realize the flow of water between the various water supply pipelines 200.

[0069] The heating tube assembly is connected to the corresponding water supply pipe 200 through one of the water passages on the second end cap 130. The water supply pipe 200 is located at the downstream end of the corresponding circulating water path. The water flow output from the water supply pipe 200 enters the heating pipe 400 after passing through the corresponding water passage.

[0070] The water heater involved in this application has water supply pipes 200 connected in series and connected to heating pipes 400. The heating element 410 in the heating pipes 400 heats the water in the heating pipes 400 and transfers the heat to the heat exchange chamber. When water is used, low-temperature water is supplied to the water supply pipes 200. The heat in the heat exchange chamber is transferred to the low-temperature water in the water supply pipes 200, heating the low-temperature water. Before being output, the water in the water supply pipes 200 undergoes secondary heating in the heating pipes 400 to ensure the water temperature and meet the user's immediate water needs.

[0071] Of course, the heat exchange chamber can include two or more circulating water paths, with different circulating water paths connected in parallel and the same water supply pipeline connected in series to improve the efficiency of water inlet and outlet.

[0072] In some embodiments of this application, the heat exchange cavity includes at least two circulating water paths, the diameter of the heating pipe 400 is larger than that of the water supply pipe 200, and the water inlet pipe is connected to two or more water supply pipes 200.

[0073] For ease of understanding, the water supply pipe 200 and heating pipe 400 connected to the first end cap 120 are defined as the first end 201, and the water supply pipe 200 and heating pipe 400 connected to the second end cap 130 are defined as the second end 202.

[0074] The first end 201 of the heating pipe 400 is connected to the outlet pipe, and the second end 202 of the heating pipe 400 is connected to at least two corresponding water supply pipes 200 through the second water flow group.

[0075] The heating pipe 400 has a large diameter, which serves two purposes: firstly, to meet the installation size requirements of the heating element 410, and secondly, to increase the internal water capacity. If necessary, the heating pipe 400 can be connected to two or more water supply pipes 200 to improve the heating efficiency.

[0076] refer to Figure 4 The water passage cavity on the first end cap 120 is defined as the first water passage cavity 310. The first water passage group includes multiple first water passage cavities 310. The first water passage cavity 310 is used to connect the first ends 201 of the two water supply pipelines 200.

[0077] refer to Figure 7 The second water passage group includes a water collection chamber 330 and multiple second water passage chambers 320. The second water passage chambers 320 are used to connect the second ends 202 of the two water supply pipes 200, and the water collection chamber 330 is used to connect the corresponding water supply pipe 200 and the heating pipe 400.

[0078] In some embodiments, the second end 202 of the heating pipe 400 is connected to the middle position of the water collection cavity 330, and the second ends 202 of the two water supply pipes 200 are respectively located at both ends of the water collection cavity 330 and on both sides of the heating pipe 400, so that the water flow in the different water supply pipes 200 does not affect each other during the process of being transported to the heating pipe 400.

[0079] Generally, the first ends 201 of the two water supply pipes 200 connected to the same first water passage 310 are respectively connected to different second water passages 320, so that the water flow input from the water inlet pipe is delivered to the heating pipe 400 after passing through different water supply pipes 200, and finally output from the water outlet pipe.

[0080] The first water passage chamber 310 is used to connect the first ends 201 of two water supply pipes 200 arranged side by side. Water in one water supply pipe 200 is transported to the first end 201 of the other water supply pipe 200 after passing through the first water passage chamber 310, thereby realizing the water connection between different water supply pipes 200.

[0081] Similarly, the second water passage 320 is used to connect the second ends 202 of two side-by-side water supply pipes 200. Water in one water supply pipe 200 is transported to the second end 202 of the other water supply pipe 200 after passing through the second water passage 320, so that the water flows back and forth between the first end cover 120 and the second end cover 130, circulating and heating, thereby improving the heating effect.

[0082] In other embodiments, the heating cavity includes two or more circulating water paths. In this case, the corresponding first water passage 310 is used to connect the first ends 201 of the three water supply pipes 200 arranged side by side, and the second water passage 320 is used to connect the second ends 202 of the three water supply pipes 200.

[0083] The water collection chamber 330 is used to connect the three water supply pipes 200 located at the downstream end of the corresponding circulating water circuit to the heating pipe 400.

[0084] The low-temperature water transported by the inlet pipe is delivered to three water supply pipes 200 connected to the inlet pipe, and is transported along the corresponding circulation pipes 200, and finally flows into the heating pipe 400 through the water collection chamber 330.

[0085] refer to Figure 5 , Figure 8 In some embodiments of this application, the first end cap 120 and the second end cap 130 are formed by splicing two shell structures.

[0086] The first end cap 120 includes a first inner shell 121 and a first outer shell 122. The first inner shell 121 is located on the side close to the peripheral sidewall. An inner recess 301 extending toward the peripheral sidewall is formed on the first inner shell 121. An outer recess 302 extending away from the peripheral sidewall is formed on the first outer shell 122. A first water passage cavity 310 is formed between the corresponding inner recess 301 and outer recess 302.

[0087] A first water passage cavity 310 is formed between the inner recess 301 and the outer recess 302 of the first end cap 120, which can increase the water passage volume of the first water passage cavity 310, make the water flow smoother during the flow process, reduce water flow resistance, and reduce noise.

[0088] The first inner shell 121 and the first outer shell 122 are made of stainless steel or copper plates. The inner recess 301 and the outer recess 302 formed thereon are both press-formed structures formed by stamping. The first inner shell 121 and the first outer shell 122 are welded together to form the second water passage cavity 320, which helps to save the turning space of the waterway.

[0089] In some embodiments of this application, the second end cap 130 includes a second inner shell 131 and a second outer shell 132. The second inner shell 131 is located on the side close to the peripheral sidewall. An inner recess 301 extending toward the peripheral sidewall is formed on the second inner shell 131. An outer recess 302 extending away from the peripheral sidewall is formed on the second outer shell 132. A second water passage cavity 320 and a water collection cavity 330 are formed between the corresponding inner recess 301 and outer recess 302.

[0090] The second end cap 130 forms a second water passage cavity 320 and a water collection cavity 330 between the inner recess 301 and the outer recess 302, which helps to increase the water passage volume of the second water passage cavity 320. The water flows more smoothly in the second water passage cavity 320 and the water collection cavity 330, reducing water flow resistance and noise.

[0091] The second inner shell 131 and the second outer shell 132 are made of stainless steel or copper plates, respectively. The inner recess 301 and the outer recess 302 formed thereon are both press-formed structures formed by stamping. The second inner shell 131 and the second outer shell 132 are welded together to form the second water passage cavity 320, which helps to save the turning space of the water passage.

[0092] refer to Figure 5 , Figure 6 In some embodiments of this application, the outer side of the first end cap 120 is detachably connected to a mounting part 140, which has a certain thickness to realize the connection and fixation of the water inlet pipe, the water outlet pipe and the heating element 410.

[0093] The mounting section 140 is provided with a water inlet port 500 and a water outlet port 600. The water inlet port 500 is located above the water outlet port 600. The water inlet port 500 is used to connect to the water inlet pipe, and the water outlet port 600 is used to connect to the water outlet pipe.

[0094] The inlet port 500 and the outlet port 600 are detachably connected to the mounting part 140 by means of threaded connection. The inlet pipe is connected to the inlet port 500 and the outlet pipe is connected to the outlet port 600.

[0095] Because the first end cap 120 and the second end cap 130 are relatively thin, their connection stability with the working parts such as the water inlet pipe, the water outlet pipe, and the heating element 410 is poor. The mounting part 140 provides a mounting base for the water inlet port 500 and the water outlet port 600, so that the connection is stable.

[0096] Combination Figure 9In some embodiments of this application, a water distribution cavity 141 is formed between the mounting part 140 and the first end cover 120. The water inlet port 500 is connected to the water distribution cavity 141. Two water supply pipes 200 directly connected to the water inlet port 500 pass through the first end cover 120 and are connected to the water distribution cavity 141, so that the water flow input from the water inlet port 500 is diverted to different water supply pipes 200.

[0097] To facilitate processing, a water-dividing recess is formed on the side of the mounting portion 140 near the first end cap 120, and a water-dividing cavity 141 is formed between the water-dividing recess and the outer wall of the first end cap 120.

[0098] The first inner shell 121 and the second outer shell 132 of the first end cap 120 have through insertion holes, and the corresponding two water supply pipes 200 connected to the water inlet pipe pass through the insertion holes and communicate with the water distribution chamber 141.

[0099] The water distribution cavity 141 is formed between the mounting part 140 and the first end cover 120, which helps to reduce the weight of the mounting part 140 while ensuring its thickness and making full use of the space of the mounting part 140. The water distribution cavity 141 connects the water inlet port 500 to different water supply pipelines 200, which can realize the simultaneous delivery of multiple water channels and improve the heat exchange effect with the heat exchange cavity.

[0100] In some embodiments of this application, the axes of the water outlet port 600 and the heating pipe 400 do not coincide, and a manifold 142 is formed between the mounting part 140 and the second end cap 130. The manifold 142 is used to connect the first end 201 of the heating pipe 400 and the water outlet port 600.

[0101] Similar to the water distribution cavity 141, a return recess is formed on the side of the mounting portion 140 near the first end cap 120, and a confluence cavity 142 is formed between the confluence recess and the outer wall of the first end cap 120.

[0102] A heating element 410 is installed inside the heating pipe 400. The heating element 410 is coaxial with the heating pipe 400 and is directly connected to the mounting part 140. The water outlet 600 is offset from the heating pipe 400 in the mounting part 140 to avoid interference with the heating element 410 and facilitate assembly.

[0103] Specifically, a threaded hole is formed on the mounting part 140, and the fixed end of the heating element 410 is threadedly connected to the mounting part 140.

[0104] Through holes are formed on the first inner shell 121 and the second inner shell 131 of the first end cap 120. After one end of the heating element 410 is fixed on the mounting part 140, the other end extends from the through hole on the first inner shell 121 and the second inner shell 131 into the heating pipe 400.

[0105] In some embodiments of this application, the outer shell 100 is made of stainless steel or copper plate, and the first end cap 120, the second end cap 130 and the peripheral shell 110 are connected and fixed by welding.

[0106] Refer again Figure 3 In some embodiments of this application, a temperature measuring element 150 is provided on the first end cover 120, and the temperature measuring element 150 extends into the heat exchange cavity.

[0107] Temperature sensor 150 is used to detect the temperature of the phase change material filled in the heat exchange cavity. When temperature sensor 150 detects that the temperature of the phase change material has reached the preset temperature, heating element 410 is turned off to stop heating and achieve temperature control.

[0108] Refer again Figure 8 In some embodiments of this application, the second end cap 130 is provided with an injection port 133, and a filling pipeline is detachably connected to the injection port 133 for filling the heat exchange cavity with phase change material.

[0109] In the heat exchange cavity, multiple heat exchange fins are arranged at intervals along the axial direction perpendicular to the water supply pipeline 200.

[0110] The heat exchange fins are provided with through connection ports for the water supply pipe 200 and the heating pipe 400 to pass through. The heat in the heating pipe 400 is transported to the water supply pipe 200 through the heat exchange fins and the phase change material in the heat exchange cavity.

[0111] In some other embodiments of this specification, in addition to the connection port for the water supply pipe 200 and the heating pipe 400 to pass through, each fin is also provided with multiple openings to reduce the weight of each fin and improve the uniform heat transfer effect of the phase change material.

[0112] Different types of fins have staggered openings, or different types of fins have openings of different numbers, shapes, positions, or directions.

[0113] Heat exchange fins of the same type should not be arranged adjacent to each other in the shell to avoid forming two identical openings at the same horizontal height in adjacent positions. This would prevent the phase change material near the two openings from being without heat exchange fins for heat exchange. Arranging heat exchange fins of different types adjacent to each other can ensure that the phase change material in the shell can be uniformly heat exchanged through the fins, thus ensuring the heat exchange effect of the phase change material.

[0114] In some embodiments of this application, the heating pipe 400 is located at the bottom of the heat exchange cavity to facilitate heat transfer from bottom to top.

[0115] Multiple water supply pipes 200 are arranged horizontally and parallelly at different horizontal heights within the heat exchange cavity to fully utilize the heat from the heat exchange fins and phase change material.

[0116] The heat exchange fins are used to transfer heat within the heating pipe 400 and to transfer the heat to the phase change material filled in the heating cavity, thereby reducing the surface temperature in contact with the phase change material. When the water to be heated flows through the water supply pipe 200, the phase change material transfers heat to the low-temperature water in the water supply pipe 200 through the heat exchange fins, thereby realizing heat exchange between the heating element 410, the phase change material, and the water supply pipe 200.

[0117] After the low-temperature water in the water supply pipeline 200 absorbs the heat from the phase change material and is heated for the first time, it is transported to the heating pipeline 400 along with the water flow. In the heating pipeline 400, it is heated a second time by the heating element 410, which improves the heating efficiency, ensures the outlet water temperature, and makes it more immediate.

[0118] Furthermore, fins can increase the heat exchange area between the phase change material and the heat exchanger, helping the heat exchanger to dissipate or absorb heat more quickly and improve heat exchange efficiency.

[0119] Specifically, when the user has no water demand, the heating element 410 heats the water in the heating pipe 400, and the heat is transferred to the phase change material through the pipe body of the heating pipe 400.

[0120] At the same time, the temperature measuring element 150 monitors the temperature of the phase change material in real time, and the heating element 410 is turned off when the temperature rises above the preset temperature.

[0121] When water is needed, the heating element 410 is turned on again, and low-temperature water is introduced into the water supply pipe 200. When the low-temperature water flows in the water supply pipe 200, it will absorb the heat of the phase change material and raise the water temperature. When the water flows through the heating pipe 400 for the last time, the heating element 410 will rapidly heat the water that has already been heated again, so as to meet the purpose of using hot water.

[0122] The water heater involved in this application uses phase change material to initially raise the temperature of the water flow in the water supply pipe 200, and then raises the temperature a second time through the heating element 410 in the downstream heating pipe 400, which can ensure the increase of hot water output.

[0123] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0124] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0125] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A water heater, characterized by, include: The outer shell has a heat exchange cavity formed therein. The outer shell includes a peripheral shell and a first end cover and a second end cover disposed at both ends of the peripheral shell. A first water passage group and a second water passage group are respectively formed on the first end cover and the second end cover. A heating pipe is connected at both ends between the first water flow group and the second water flow group, and a heating element is installed inside the heating pipe. The water supply pipeline has its two ends connected between the first water flow group and the second water flow group, respectively; Wherein, the first water-passing group is used to connect different water supply pipelines; the second water-passing group is used to connect different water supply pipelines, and / or, the second water-passing group is used to connect the corresponding water supply pipeline to the heating pipeline.

2. The water heater according to claim 1, characterized in that, The diameter of the heating pipe is larger than that of the water supply pipe, and the water inlet pipe is connected to at least one of the water supply pipes; The first end of the heating pipe is connected to the outlet water pipe, and the second end of the heating pipe is connected to at least two corresponding water supply pipes through the second water flow group.

3. The water heater according to claim 2, characterized in that, The first water passage group includes a plurality of first water passage chambers, which are used to connect the first ends of the two water supply pipelines. The second water passage group includes a water collection chamber and multiple second water passage chambers. The second water passage chambers are used to connect the second ends of the two water supply pipes, and the water collection chambers are used to connect the corresponding water supply pipes and the heating pipes. The first ends of the two water supply pipes connected to the same first water passage are respectively connected to different second water passages, so that the water flow input from the inlet pipe is delivered to the heating pipe after passing through different water supply pipes, and finally output from the outlet pipe.

4. The water heater according to claim 3, characterized in that, The first end cap includes a first inner shell and a first outer shell. The first inner shell is located on the side close to the peripheral sidewall. An inwardly recessed portion is formed on the first inner shell, extending toward the peripheral sidewall. An outwardly recessed portion is formed on the first outer shell, extending away from the peripheral sidewall. The first water passage cavity is formed between the corresponding inwardly recessed portion and the outwardly recessed portion.

5. The water heater according to claim 3, characterized in that, The second end cap includes a second inner shell and a second outer shell. The second inner shell is located on the side close to the peripheral sidewall. An inwardly recessed portion is formed on the second inner shell, extending toward the peripheral sidewall. An outwardly recessed portion is formed on the second outer shell, extending away from the peripheral sidewall. The second water passage cavity and the water collection cavity are formed between the corresponding inwardly recessed portion and the outwardly recessed portion.

6. The water heater according to claim 1, characterized in that, The outer side of the first end cap is detachably connected to a mounting part, which is provided with a water inlet port and a water outlet port. The water inlet port is located above the water outlet port. The water inlet port is used to connect to the water inlet pipe, and the water outlet port is used to connect to the water outlet pipe.

7. The water heater according to claim 6, characterized in that, A water distribution cavity is formed between the mounting part and the first end cover. The water inlet port is connected to the water distribution cavity. Two water supply pipes directly connected to the water inlet port pass through the first end cover and are connected to the water distribution cavity, so that the water flow input from the water inlet port is diverted to different water supply pipes.

8. The water heater according to claim 6, characterized in that, The water outlet port and the heating pipe are not aligned on the same axis. A manifold is formed between the mounting part and the second end cap. The manifold is used to connect the first end of the heating pipe and the water outlet port.

9. The water heater according to claim 1, characterized in that, The outer shell is made of stainless steel or copper plate, and the first end cap, the second end cap, and the peripheral shell are connected and fixed by welding.

10. The water heater according to claim 1, characterized in that, A temperature measuring element is provided on the first end cap, and the temperature measuring element extends into the heat exchange cavity; and / or The second end cap is provided with an injection port for filling the heat exchange cavity with phase change material.

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