Open water heater

By designing an open water heater, the long waiting time, waste of resources and safety hazards of traditional closed water heaters are solved, and a fast, safe and convenient way to obtain hot water is provided to adapt to a variety of life scenarios.

CN223165736UActive Publication Date: 2025-07-29汨罗鑫宇家居科技发展中心
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Patent Information

Application Number
CN202422353890.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-26
Publication Date
2025-07-29
Estimated Expiration
2034-09-26

AI Technical Summary

Technical Problem

Traditional closed-end water heaters have problems such as long wait time, waste of water resources and energy, high safety risks, difficulty in cleaning up internally and heavy metal pollution when using hot water.

Method used

An open water heater is designed, including a barrel shell, a barrel lid, an inner liner, a heating piece and a water outlet mechanism. It is heated through the insulation layer, heated at low power and can be manually cleaned, equipped with a water outlet and a power supply mechanism to adapt to different environments.

Benefits of technology

It achieves rapid acquisition of hot water, saves energy and water resources, improves safety, is convenient for cleaning, adapts to a variety of usage scenarios, and meets the needs of fast and convenient modern life.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223165736U_ABST
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Abstract

The utility model discloses an open water heater which comprises a water heater body, a power supply mechanism and a water outlet mechanism. According to the closed water heater, the water heater body is arranged and comprises the barrel shell, the barrel cover, the water inlet hose, the barrel bottom and other assemblies, under mutual cooperation, water can be heated, stored and subjected to heat preservation, the closed water heater can be conveniently used at any time, and a series of problems existing in a traditional closed water heater are optimized; the water heater is simple in structure and convenient to use, the hot water production process is safer, more environment-friendly and more energy-saving, the structure of the water heater is associated with the living needs of people, the lower body is slim, the water heater follows the living needs of people, the water heater truly becomes a good helper for the living needs of people and is well known, and the hot water using process of people is quicker, more convenient and more humanized.
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Description

Technical Field

[0001] The utility model relates to the technical field of water heater manufacturing, and particularly relates to an open water heater. Background Technique

[0002] Currently, the hot water (referring to non-drinking hot water and non-edible hot water) required for daily life such as people taking baths, washing faces, washing hair, washing feet, washing hands, washing dishes, and washing vegetables is generated by closed water heater devices such as "hanging electric water heaters" and "coal (gas) water heaters". The deficiencies and drawbacks are as follows:

[0003] 1. Since the closed water heater starts the device power switch to boil water in the way of tap water flowing, when hot water is urgently needed, a lot of cold water needs to be discharged first and a long time needs to be waited before hot water can be obtained for use.

[0004] 2. Because the function of the closed water heater is severely restricted by the location conditions of indoor water and electricity infrastructure, for the water-washing rooms with a relatively long indoor layout, there are the following three types of waste and consumption when using hot water, namely: First, when taking hot water, the waiting time is longer, which is a wasteful consumption of time; second, when taking hot water, more useless cold water is discharged, which is a wasteful consumption of water resources; third, the useless cold water discharged is actually the cooled hot water that has been heated by coal (gas) or electricity, and converting the consumed gas or electricity into cost is a wasteful consumption of funds.

[0005] 3. The new generation of closed water heaters, namely instant water heaters, have achieved remarkable results in terms of convenient and rapid use of hot water to solve the problems existing in the above-mentioned water heaters. However, the manufacture of instant water heaters operates by over-increasing the power of the device heating element to achieve the rapid hot water effect. The device generally operates at a power between 2000W and 5500W. Once the device is under many "illegal and improper factors" such as "improper installation", "improper maintenance due to aging over the years", "improper operation in the use process", and "improper quality control in manufacturing", the personal safety and property safety problems of thousands of families pose a serious challenge and major test that cannot be underestimated, and the potential safety accidents are serious.

[0006] 4. The internal water storage containers of closed water heaters cannot be manually cleaned and wiped, and the quality of the heated hot water deteriorates, containing heavy metal pollution elements, losing the meaning of green environmental protection. Content of the Utility Model

[0007] The purpose of the utility model is to provide an open water heater to solve the problems raised in the above background technique.

[0008] To achieve the above object, the utility model adopts the following technical solutions: An open water heater, comprising a water heater main body, a power supply mechanism is connected to the right end of the water heater main body, and a water outlet mechanism is connected to the left end of the water heater main body;

[0009] The water heater main body includes a barrel outer shell, a barrel cover, a water inlet hose and a barrel bottom. A barrel cover is provided at the top of the barrel outer shell. A water inlet hose is connected to the top of the barrel cover. The barrel bottom is connected to the bottom of the barrel outer shell;

[0010] An inner liner is provided inside the barrel outer shell. A first heat preservation layer is filled between the inner liner and the barrel outer shell. A signal lamp is provided at the front end of the barrel outer shell.

[0011] Preferably, a second heat preservation layer is provided at the inner end of the barrel cover. One end of the water inlet hose is connected to an external water source, and the other end passes through the barrel cover and extends into the inner liner through the second heat preservation layer, and is connected to an automatic water inlet valve.

[0012] Preferably, not less than two groups of support members are provided at equal intervals at the bottom end of the barrel bottom, and not less than two groups of heating elements are provided at the position of the barrel bottom near the bottom end of the inner liner.

[0013] Preferably, the power supply mechanism includes a socket, a power cord and a time control switch. A socket is provided at the right end of the barrel bottom. A power cord is provided inside the socket. The other end of the power cord is connected to an external power supply through the time control switch.

[0014] Preferably, the water outlet mechanism includes a water outlet connector, an external booster pump, a water outlet hose, a shower head and a remote control switch. A set of water outlet connectors is provided at the outer bottom end of the barrel outer shell. A set of external booster pumps is connected to the outer end of the water outlet connector. The water outlet of the external booster pump is connected to the shower head through the water outlet hose, and the external booster pump is connected to an external power supply through the remote control switch.

[0015] Preferably, the maximum heating temperature of the heating element is 120 °C, and the internal temperature of the inner liner can be kept constant at 70 °C.

[0016] Preferably, the first heat preservation layer and the second heat preservation layer are made of the same material.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. In daily life, the barrel cover can be removed, and the inner liner of the water storage barrel can be cleaned with a clean rag. When used in the kitchen or public places, the barrel cover can be removed, and soup or drinking tea can be poured into the barrel for constant heat preservation. The barrel cover can also be removed, and the soup or tea in the barrel can be directly scooped out with a soup spoon or utensil. Cleaning and use are both convenient and flexible.

[0019] 2. The hot water not only retains the pure characteristics of being fired by firewood or coal, but also fully meets the requirements and desires of modern people for pursuing fast, convenient and pleasant hot water use.

[0020] 3. The "three lows" mode of "low water temperature, low water pressure, and low power" provides reliable design source technical support and guarantee for preventing hot water leakage and electric shock, saving electricity and water, and completely avoids the occurrence of so-called safety accidents caused by "improper operation" during the use of hot water.

[0021] 4. It is not afraid of water cut-off or power cut-off, and combines the two major functions of hot water and water storage. In case of sudden power cut-off or water cut-off, there is always hot water available for washing face, hands, taking a bath, washing the buttocks of infants, cooking, washing vegetables, stir-frying, making tea, washing dishes and flushing the toilet, etc.

[0022] 5. In case of continuous water cut-off, the lid can be removed, and well water or other natural water fetched from outside can be poured into the water storage bucket and heated by power supply for temporary emergency use.

[0023] 6. The main body structure is simple, the operation is flexible, the applicable performance is down-to-earth and highly effective. The higher the floor location, the greater the practical value. When used in combination with traditional water heaters, it can complement each other's advantages, adding more happiness and comfort to the perfect experience of using hot water at home.

[0024] 7. There are various sizes and styles such as 2L, 3L, 4L, 5L, 10L, 15L, 20L, 25L, 30L, 40L, 50L, 60L, 70L, 80L, 90L, 100L, etc., with diverse models and complete specifications.

[0025] 8. The low-temperature domestic water temperature within a constant range of up to 70°C can be set and controlled automatically by manually operating the time control switch.

[0026] 9. The water outlet speed is fast, the flow rate is large without splashing around, showing a gentle and natural flowing state, closely meeting the water intake requirements of contemporary people's fast-paced life.

[0027] 10. The manufacturing process is simple, the technology is easy to master, the project can be launched easily, the cost is low, the return is fast, the production employees are not restricted by special educational qualifications, the raw material sources are wide, the production scale is appropriate, and there is no need to invest in the purchase of fixed assets such as factories and heavy mechanical equipment.

[0028] 11. It is suitable for people's daily life, durable, inexpensive, economical and practical, with a long service life, broad market prospects, great economic value, and reliable and considerable business returns. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view structural schematic diagram of the present utility model;

[0030] Figure 2 This is a schematic structural diagram of the connection between the outer shell and the lid of the small barrel of the present utility model;

[0031] Figure 3 This is a schematic structural diagram of the connection between the outer shell and the lid of the large barrel of the present utility model;

[0032] Figure 4 This is a schematic bottom-up structural diagram of the inner tank of the present utility model;

[0033] Figure 5 This is a schematic structural diagram of the power supply mechanism of the present utility model;

[0034] Figure 6 This is a schematic internal structure diagram of different sockets of the present utility model;

[0035] Figure 7 This is a schematic structural diagram of the water outlet mechanism of the present utility model,

[0036] Figure 8 This is a schematic structural diagram of the water outlet connector of the present utility model.

[0037] In the figure: water heater main body - 1, power supply mechanism - 2, water outlet mechanism - 3, barrel outer shell - 11, barrel lid - 12, water inlet hose - 13, barrel bottom - 14, inner tank - 111, first insulation layer - 112, signal lamp - 113, second insulation layer - 121, automatic water inlet valve - 131, support member - 141, heating element - 142, socket - 21, power cord - 22, time control switch - 23, water outlet connector - 31, external booster pump - 32, water outlet hose - 33, shower - 34, remote control switch - 35. Specific embodiments

[0038] In order to further explain the technical solution of the present utility model, it will be elaborated in detail through specific embodiments below.

[0039] Embodiment 1

[0040] Please refer to Figure 1-2 , the present utility model provides an open water heater, including a water heater main body 1. A power supply mechanism 2 capable of supplying power is connected to the right end of the water heater main body 1, and a water outlet mechanism 3 is connected to the left end of the water heater main body 1;

[0041] The water heater main body 1 includes a barrel outer shell 11, a barrel lid 12, a water inlet hose 13 and a barrel bottom 14. The barrel lid 12 is connected to the top of the barrel outer shell 11, the water inlet hose 13 is connected to the top of the barrel lid 12, and the barrel bottom 14 is connected to the bottom of the barrel outer shell 11;

[0042] Inside the barrel housing 11, there is an inner tank 111 that can come into contact with water. A first heat preservation layer 112 is filled between the inner tank 111 and the barrel housing 11 to keep the hot water warm. A signal lamp 113 is provided at the front end of the barrel housing 11 to display the working state of the water heater main body 1.

[0043] According to different usage environments and requirements, the barrel housing 11 can be square, oval, tower-shaped, pig kidney-shaped, or other shapes. Moreover, the barrel lid 12, barrel bottom 14, and inner tank 111 also deform accordingly with the change of the barrel housing 11, which will not be elaborated here.

[0044] Please refer to Figure 1-4 , the present utility model provides an open water heater. An inner heat preservation layer 121 is provided at the inner end of the barrel lid 12. The inner heat preservation layer 121 is made of the same material as the first heat preservation layer 112 to improve the heat preservation effect. One end of the water inlet hose 13 is connected to an external water source, and the other end passes through the barrel lid 12 and extends into the inner tank 111 through the inner heat preservation layer 121 and is connected with an automatic water inlet valve 131 to inject water into the inner tank 111. Among them, for the small and micro water heater main body 1, the water inlet hose 13 and the automatic water inlet valve 131 may not be installed, and water can be directly poured into the inner tank 111.

[0045] At least two groups of support members 141 are equidistantly provided at the bottom end of the barrel bottom 14, and at least two groups of heating elements 142 are provided at the top end of the barrel bottom 14 near the bottom end of the inner tank 111 to heat the water in the inner tank 111. The heating element 142 can be heated up to 120 °C at most and can keep the internal temperature of the inner tank 111 constant at 70 °C to improve the heat preservation effect.

[0046] Please refer to Figure 5-6 , the present utility model provides an open water heater. The power supply mechanism 2 includes a socket 21, a power cord 22, and a time control switch 23. A socket 21 is provided at the right end of the barrel bottom 14. A power cord 22 is provided inside the socket 21, and the other end of the power cord 22 is connected to an external power source through the time control switch 23 for power supply and controlled by the time control switch 23.

[0047] Please refer to Figure 7-8 , the present utility model provides an open water heater. The water outlet mechanism 3 includes a water outlet connector 31, an external booster pump 32, a water outlet hose 33, a shower head 34, and a remote control switch 35. A set of water outlet connectors 31 is provided at the outer bottom end of the barrel housing 11. A set of external booster pumps 32 is connected to the outer end of the water outlet connector 31 to increase the water pressure. The water outlet of the external booster pump 32 is connected to the shower head 34 through the water outlet hose 33, which is beneficial for the hot water to spray out from the shower head 34. Moreover, the external booster pump 32 is connected to an external power source through the remote control switch 35, and the start of the external booster pump 32 can be controlled through the remote control switch 35. Among them, for the small water heater main body 1, it can be directly connected to a faucet through the water outlet connector 31, or directly draw water from the inner tank 111, and the water outlet mechanism 3 may not be installed.

[0048] Example 2

[0049] Please refer to Figure 1-3 , the bucket lid 12 can be made of metal, plastic, wood or ceramic. Besides the round shape, there are also square, oval, pig waist-shaped and nozzle-shaped ones that vary with the shape of the bucket body. There are structures with an inner thermal insulation layer II 121, and there are also structures without the inner thermal insulation layer II 121. It forms an integral object with the bucket shell 11 through its snap or screw thread.

[0050] Example 3

[0051] Please refer to Figure 1-2 , the inner liner 111 is made of metal materials, including stainless steel, copper, aluminum, galvanized iron and other material materials. At any time and under any conditions, there must be a strict quality control to ensure no water leakage and no penetration. According to different usage situations, the materials need to be divided into food-grade and non-food-grade. It can be customized and formed as required from relevant professional bucket manufacturers. The entire inner liner 111 is completely placed inside the wrapping of the bucket shell 11, and the intermediate layer is filled with the thermal insulation layer I 112.

[0052] Example 4

[0053] Please refer to Figure 1-3 , the bucket shell 11 can be made of metal materials, or plastic materials, or bamboo, wood materials or leather materials. The surface colors and pattern designs are various. If it is plastic, it is formed by injection molding; if it is metal, it is formed by welding; if it is bamboo or wood, it is formed by splicing; if it is leather, it is formed by sewing or pasting.

[0054] Example 5

[0055] Please refer to Figure 2-3 , the component where the bucket shell 11 and the bucket lid 12 are combined. For a bucket body with a large water storage volume, it is locked by snap; for a bucket body with a small water storage volume, it is screwed and locked with a screw thread.

[0056] Example 6

[0057] Please refer to Figure 1 , the bucket bottom 14 can be made of bamboo or wood materials, or metal materials or plastic materials. Besides the round shape, there are also square, oval and pig waist-shaped ones that vary with the shape of the bucket shell 11, etc. The support member 141 for supporting the bucket shell 11, such as a foot pad, a bracket, a universal wheel, a soft gasket, etc., is installed at the bottom end of the bucket bottom 14.

[0058] Example 7

[0059] Please refer to Figure 6, for the barrel body with a large volume, the socket 21 and the power cord 22 are groove-shaped sockets and groove-shaped power lead plugs; for the barrel body with a small volume, the socket 21 and the power cord 22 are power sockets and power lead plugs in the shape of the symbol ∞. Also, according to different requirements for the volume of the barrel body, aviation sockets and aviation power lead plugs that meet the specification conditions can be selected for installation. It is also possible not to install the socket 21 and directly connect the tail end of the power cord 22 plug to the circuit power input terminal inside the barrel bottom 14.

[0060] Embodiment 8

[0061] Please refer to Figure 5 , the time control switch 23 has styles of electronic products and mechanical products. The operation procedure of the electronic product style is complex and difficult for general experienced personnel to master. In comparison, the operation procedures of the mechanical product style are simple, and the operation results can be visually observed by the naked eye, and whether it is correct or not can be accurately detected and corrected or retained in a timely manner. In order to facilitate power saving and energy conservation and regulate the temperature of hot water, almost every object of the present utility model cannot lack this supporting component.

[0062] Embodiment 9

[0063] Please refer to Figure 1 , the color of the signal lamp 113 can be any one of red, green, blue, yellow, etc., and the light can be of a static non-changing type, a dynamic flashing type, or a multi-color alternating type.

[0064] Embodiment 10

[0065] Please refer to Figure 2-3 , the automatic water inlet valve 131 has two styles, a metal type and a plastic type, and there are also differences between top water inlet and side water inlet. For the installation method of top water inlet, it enters the inner tank 111 through the perforation on the plate surface of the barrel cover 12 and is suspended at the top position of the inner tank 111. For the installation method of side water inlet, it enters the inner tank 111 through the perforation on the side surface of the barrel cover 12 and is fixed to the inner plate surface of the barrel cover 12 by screw fixation. For the objects of the present utility model that do not require automatic water inlet, the automatic water inlet valve 131 is not configured.

[0066] Embodiment 11

[0067] Please refer to Figure 4, the heating element 142 is a ceramic low-temperature heating sheet, which is a low-temperature heating semiconductor element wrapped by an aluminum shell. The power of each element is closely related to the temperature. That is, when the temperature is high, the power becomes small, about 4 watts; when the temperature is low, the power becomes large, about 20 watts. It is connected in parallel by wires and pasted on the bottom surface of the inner tank 111. The wires are Teflon high-temperature resistant wires with a cross-sectional area of 0.52 and above. The adhesive tape is Teflon high-temperature resistant tape. The joints are fixed by soldering and are equipped with high-temperature resistant insulating sleeves for leakage protection. The panel on the outer side of the bottom of the inner tank 111 is covered with a high-temperature resistant fabric for insulation protection. The number of installation sheets of the object of the present invention is determined by the water volume of the inner tank 111. For a small barrel body with a volume of about 2L, the number of installation sheets is 1; for a large barrel body with a volume of about 100L, the number of installation sheets is about 10 or 12. The number of sheets installed on other volume barrel bodies can be deduced by analogy.

[0068] Example 12

[0069] Please refer to Figure 2-3 , the heat insulation materials in the first heat insulation layer 112 and the second heat insulation layer 121 can be powder materials, floc materials, back adhesive tapes, PU materials, etc. with heat insulation functions. In terms of the heat insulation effect and the difficulty of the operation process, PU materials are the best choice.

[0070] Example 13

[0071] Please refer to Figure 8 , the water outlet connector 31 can be made of copper, food-grade stainless steel, or non-food-grade stainless steel. It has a 4-point pipe diameter and a length of 5CM - 6CM. It has external threads formed with nuts and soft gaskets. It is installed above the bottom of the barrel body, passing through the barrel shell 11, the first heat insulation layer 112, and the inner tank 111, and is fixed with nuts. The outer end pipe head is connected to the water outlet hose 33. For large or extra-large barrel bodies, one or two more of these components can be installed. However, for small and micro barrel bodies that discharge hot water through a faucet or pour out hot water from the inner tank 111, this water outlet connector 31 is not installed.

[0072] Example 14

[0073] Please refer to Figure 1-3 , the water inlet hose 13 is a pipe with one end connected to the water source pipe and the other end connected to the automatic water inlet valve 131. If the water inlet source is high-pressure tap water, it is connected to pipes such as metal explosion-proof pipes and plastic explosion-proof pipes. If the water inlet source is high-level drop water, it can be connected to non-explosion-proof type pipes. The pipe diameter can be 3 points or 2 points. For hot water used in the kitchen and for drinking, the pipe body is made of food-grade pipe material. However, if the hot water is used for other purposes, the pipe body can be made of non-food-grade pipe material. For barrel bodies that do not require the installation of the automatic water inlet valve 131, this water inlet hose 13 is not configured.

[0074] Example 15

[0075] Please refer to Figure 7 , the water outlet hose 33 is a pipe with one end connected to the water outlet connector 31 and the other end connected to a faucet. The material is a metal hose or a plastic hose, with a caliber of 3 / 4 or 4 / 4 inches. It can be of explosion-proof or non-explosion-proof grade. For hot water used in the kitchen or for drinking, it belongs to the food-grade type of pipe. For hot water used in other aspects, it can be a non-food-grade type of pipe. If the water outlet from the barrel body is in the form of a faucet or directly poured out from the inner tank 111, this water outlet hose 33 is not configured.

[0076] Example 16

[0077] Please refer to Figure 7 , the external booster pump 32 is a special component configured for using hot water for bathing in the bathroom. Its water inlet end is connected to the water outlet connector 31, and its water outlet end is connected to the shower head 34 through the water outlet hose 33. It is installed on the outside of the barrel body and is powered by a dedicated adapter with a 24V DC voltage. It can instantly boost the weak natural flowing water and transform it into a water flow with the same pressure as high-pressure tap water, which is used for hot bathing and flushing other objects with hot water. In addition, this external booster pump 32 can also be used to lift hot water from the lower position to the higher position of the object of the present invention, but for the objects of the present invention that do not use high-pressure hot water, this external booster pump 32 is not configured.

[0078] Example 17

[0079] Please refer to Figure 7 , the remote control switch 35 is equipped with a matching remote control. The remote control switch 35 is installed on the power socket of the adapter of the external booster pump 32. The remote control switch 35 needs to be wrapped with waterproof material for its shell and is installed on the wall closer to the position of the shower head. When taking a bath, manually touch the remote control switch 35, and the external booster pump 32 is started, and high-pressure hot water sprays out from the shower head 34 for bathing.

[0080] The working principle is as follows:

[0081] First, cold water (ice cubes can also be used) is poured into the inner tank 111 of the barrel body manually or automatically. Then, the time control switch 23 is turned on to connect the power supply, so that the heating element 142 at the bottom of the inner tank 111, that is, the ceramic low-temperature heating sheet, is powered on. At this time, the ceramic low-temperature heating sheet quickly generates a constant temperature of 120 °C, conducts it to the bottom of the inner tank 111, and then conducts it to the cold water in the inner tank 111. During the continuous conduction and attenuation of the temperature, the temperature of the cold water in the inner tank 111 gradually rises from low to high and is finally kept constant at 70 °C for use.

[0082] Therefore, it is specifically stated that: the function of the present invention is not only limited to heating for domestic washing water, but can also be used for continuous heat preservation of drinking water or food, etc.

[0083] The above are only the preferred examples of the present utility model and are not intended to limit the present utility model. Although the present 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 perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An open water heater, characterized in that: It includes a water heater main body (1), a power supply mechanism (2) is connected to the right end of the water heater main body (1), and a water outlet mechanism (3) is connected to the left end of the water heater main body (1); The water heater main body (1) includes a barrel outer shell (11), a barrel cover (12), a water inlet hose (13) and a barrel bottom (14). A barrel cover (12) is provided at the top of the barrel outer shell (11). A water inlet hose (13) is connected to the top of the barrel cover (12). A barrel bottom (14) is connected to the bottom of the barrel outer shell (11); An inner tank (111) is provided inside the barrel outer shell (11). A first heat preservation layer (112) is filled between the inner tank (111) and the barrel outer shell (11). A signal lamp (113) is provided at the front end of the barrel outer shell (11).

2. The open water heater according to claim 1, characterized in that: A second heat preservation layer (121) is provided inside the barrel cover (12). One end of the water inlet hose (13) is connected to an external water source, and the other end passes through the barrel cover (12) and extends into the inner tank (111) through the second heat preservation layer (121), and is connected with an automatic water inlet valve (131).

3. The open water heater according to claim 1, wherein: Not less than two groups of support members (141) are equidistantly provided at the bottom end of the barrel bottom (14), and not less than two groups of heating members (142) are provided at a position near the bottom end of the inner tank (111) at the top end of the barrel bottom (14).

4. The open water heater according to claim 1, characterized in that: The power supply mechanism (2) includes a socket (21), a power cord (22) and a time control switch (23). A socket (21) is provided at the right end of the barrel bottom (14). A power cord (22) is provided inside the socket (21), and the other end of the power cord (22) is connected to an external power supply through the time control switch (23).

5. The open water heater according to claim 1, wherein: The water outlet mechanism (3) includes a water outlet connector (31), an external booster pump (32), a water outlet hose (33), a shower head (34) and a remote control switch (35). A set of water outlet connectors (31) is provided at the outer bottom end of the barrel outer shell (11). An external booster pump (32) is connected to the outer end of the water outlet connector (31). The water outlet of the external booster pump (32) is connected to the shower head (34) through a water outlet hose (33), and the external booster pump (32) is connected to an external power supply through the remote control switch (35).

6. The open water heater according to claim 3, wherein: The maximum heating temperature of the heating member (142) is 120 °C, and the internal temperature of the inner tank (111) can be kept constant at 70 °C.

7. The open water heater according to claim 2, characterized in that: The first heat preservation layer (112) and the second heat preservation layer (121) are made of the same material.