Electric water heater
By setting a connected storage chamber between the first inner liner of the electric water heater and entering the second inner liner with water expansion into the second housing chamber to reduce pressure changes, the problem of dripping of the electric water heater safety valve is solved, and the user experience is improved.
Patent Information
- Application Number
- CN202420403665.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-03-04
AI Technical Summary
The safety valves in existing electric water heaters drip water when heated, resulting in poor user experience.
An electric water heater is designed to prevent pressure relief of water by providing communication first and second containers between the first and second containers and expanding water into the second container upon heating to reduce pressure changes of the first container, thereby preventing the safety valve from venting pressure.
The drip phenomenon of the safety valve is effectively avoided, the user experience is improved, and the second inner liner provides expansion space for the hot water of the first inner liner to prevent excessive pressure.
Smart Images
Figure CN222688425U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of water heaters, and in particular, relates to an electric water heater. Background Art
[0002] An electric water heater is a water heater that provides hot water through electrical heating.
[0003] In the prior art, when the water in the electric water heater is heated, the volume will expand and the pressure in the inner tank will increase. When the pressure increases to the opening pressure of the safety valve, the safety valve will drip water to relieve the pressure. In order to prevent the dripping water from directly dripping on the ground, a safety valve with a lower opening pressure is usually installed in a hidden position that does not affect the use to relieve the pressure in advance, or a water diversion pipe is set to drain the dripping water.
[0004] However, the above method still has the dripping phenomenon, and the user experience is poor. Utility Model Content
[0005] The present application provides an electric water heater to solve the problem of water dripping from the safety valve of the existing electric water heater.
[0006] The electric water heater provided by the present application comprises a first inner tank, a second inner tank and a heating assembly, wherein the first inner tank and the second inner tank respectively have a first accommodating cavity and a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are communicated, and the heating assembly is arranged in the first accommodating cavity;
[0007] The second liner is configured such that when the water in the first accommodating chamber is heated by the heating component, the water expands and partially enters the second accommodating chamber, so that the water pressure in the first accommodating chamber is not greater than the pressure relief pressure of the first accommodating chamber.
[0008] In a possible implementation, the electric water heater provided in the present application has at least one first connection hole formed on one side of the first inner tank, and at least one second connection hole corresponding to the first connection hole formed on one side of the second inner tank, and the first connection hole and the second connection hole are adaptably connected.
[0009] In a possible implementation, the electric water heater provided in the present application further includes at least one connecting pipe, and the first connecting hole and the second connecting hole are correspondingly connected through the connecting pipe.
[0010] In a possible implementation, in the electric water heater provided in the present application, the second inner tank is located above the first inner tank.
[0011] In a possible implementation, in the electric water heater provided in the present application, an extension direction of the second inner tank is consistent with an extension direction of the first inner tank.
[0012] In a possible implementation, in the electric water heater provided in the present application, a projection of the second inner tank toward the first inner tank is located inside the first inner tank.
[0013] In a possible implementation, in the electric water heater provided in the present application, a side of the second inner tank facing the first inner tank is an arc-shaped surface, and an arc top of the arc-shaped surface abuts against the first inner tank.
[0014] In a possible implementation, in the electric water heater provided in the present application, the volume of the second accommodating chamber is greater than or equal to twice the volume of water entering the second accommodating chamber.
[0015] In a possible implementation, the electric water heater provided in the present application further includes a shell, wherein the first inner tank and the second inner tank are both located in the shell;
[0016] The shell is filled with a foam material, and the foam material covers the first inner liner and the second inner liner.
[0017] In a possible implementation, the electric water heater provided in the present application further includes an inlet and outlet water pipe assembly, wherein the inlet and outlet water pipe assembly includes an inlet pipe, an outlet pipe and a safety valve, the inlet pipe and the outlet pipe are inserted on the same side of the first inner tank, and are partially located in the first accommodating cavity, and the safety valve is arranged on the inlet pipe and is connected to the inlet pipe.
[0018] The electric water heater provided by the present application is connected to the first accommodating chamber of the first accommodating chamber by providing a second inner tank with a second accommodating chamber. The first accommodating chamber stores water, and the second accommodating chamber is filled with gas, usually air. Under the same volume change, the pressure change of water is greater than the pressure change of air, and when the water temperature is greater than 4°C, the higher the water temperature, the larger the volume of water. In this way, when the heating component heats the water in the first accommodating chamber, the water will expand and partially enter the second accommodating chamber, and compress the air in the second accommodating chamber to reduce the pressure change of the first accommodating chamber through the second accommodating chamber. In this way, the second inner tank can be used to provide expansion space for the hot water in the first inner tank, and avoid the pressure of the first inner tank being greater than the pressure relief pressure, thereby preventing the safety valve from depressurizing and dripping, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0020] The preferred technical implementation scheme of the present application is described below with reference to the accompanying drawings. The accompanying drawings are:
[0021] Figure 1 A partial structural schematic diagram of an electric water heater provided in an embodiment of the present application;
[0022] Figure 2 A partial structural schematic diagram of the electric water heater provided in an embodiment of the present application from another perspective;
[0023] Figure 3 for Figure 2 A schematic diagram of the internal structure of the first inner liner and the second inner liner;
[0024] Figure 4 A schematic diagram of the structure of the second liner provided in an embodiment of the present application.
[0025] Description of reference numerals:
[0026] 100-first liner;
[0027] 110-first connecting hole;
[0028] 120-first accommodating chamber;
[0029] 200-second liner;
[0030] 210- second connection hole;
[0031] 220- curved surface;
[0032] 230 - horizontal plane;
[0033] 240 - second accommodating chamber;
[0034] 300-connecting pipe;
[0035] 400-heating component;
[0036] 500-inlet and outlet water pipe assembly;
[0037] 510-water inlet pipe;
[0038] 520-water outlet pipe.
[0039] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0040] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0041] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.
[0042] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.
[0043] As the background technology, most electric water heaters are equipped with a one-way valve on the water inlet pipe to prevent the water in the water inlet pipe from flowing back. When the temperature is above 4°C, the volume of water in the water heater tank will increase with the increase of temperature, causing the pressure in the tank to increase. When the pressure increases to the opening pressure of the safety valve, the safety valve will drip water to achieve pressure relief. However, the water dripping from the safety valve on the ground will cause the ground to be slippery, and long-term dripping will also cause the dripping surface to turn yellow and be damaged.
[0044] In order to prevent water from dripping from the safety valve directly onto the ground and affecting the user experience, a water pipe is often connected to the safety valve to direct the dripping water into the indoor drainage pipe for drainage; or a safety valve with a smaller opening pressure is installed in a hidden position on the pipe where dripping does not affect the user experience, so that when the pressure in the inner tank reaches the opening pressure of the safety valve, water drips to relieve the pressure, thereby preventing the pressure in the inner tank from reaching the opening pressure of the original safety valve, and preventing the water from dripping from the original safety valve from dripping directly onto the ground.
[0045] However, the above solution still causes dripping, which affects the user experience.
[0046] To solve the above problems, the present application provides an electric water heater, which provides an expansion space for the hot water in the first inner tank by disposing a second inner tank connected to a first inner tank for storing water, and the second storage chamber of the second inner tank is connected to the first storage chamber of the first inner tank, thereby preventing the pressure of the first inner tank from being greater than the pressure relief pressure, thereby preventing the safety valve from releasing pressure and dripping, and improving the user experience.
[0047] The electric water heater provided by the present application and various possible implementation forms are introduced in detail below in combination with specific implementation methods.
[0048] Figures 1 to 4 The schematic diagram of some parts of the electric water heater is shown. The specific structure of the remaining parts of the electric water heater is not limited to Figures 1 to 4of examples.
[0049] Reference Figure 1 , Figure 2 and Figure 3 As shown, the electric water heater provided in the embodiment of the present application includes a first inner tank 100, a second inner tank 200 and a heating assembly 400, the first inner tank 100 and the second inner tank 200 respectively have a first accommodating cavity 120 and a second accommodating cavity 240, the first accommodating cavity 120 and the second accommodating cavity 240 are communicated, and the heating assembly 400 is disposed in the first accommodating cavity 120;
[0050] The second inner tank 200 is configured such that when the water in the first accommodating chamber 120 is heated by the heating assembly 400 , the water expands and partially enters the second accommodating chamber 240 , so that the water pressure in the first accommodating chamber 120 is not greater than the pressure relief pressure of the first accommodating chamber 120 .
[0051] It can be understood that the first accommodating chamber 120 of the first inner tank 100 is connected to the second accommodating chamber 240 of the second inner tank 200, so that the first accommodating chamber 120 and the second accommodating chamber 240 form a closed container. The first inner tank 100 serves as a water storage tank for the electric water heater, so that the first accommodating chamber 120 is filled with water, and the part of the space not filled with water is filled with gas by itself, and the second accommodating chamber 240 is set as a cavity, that is, the second accommodating chamber 240 is also filled with gas, usually air.
[0052] Since the expansion coefficient of water is smaller than that of air, and when the water temperature is greater than 4°C, as the water temperature rises, the water in the first inner tank 100 will expand due to the heat, causing the gas in the first accommodating chamber 120 to be forced into the second accommodating chamber 240, and further compressing all the gas in the second accommodating chamber 240.
[0053] According to Boyle's law, in the closed constant volume container formed by the first accommodating chamber 120 and the second accommodating chamber 240, the volume change of water expansion is consistent with the volume change of gas compression, but under the same volume change, for the gas, the corresponding pressure change is smaller than the pressure change of water.
[0054] Therefore, since the total volume of the first accommodating chamber 120 and the second accommodating chamber 240 is greater than the volume of a single first inner liner 100, there is more gas inside, so even if the inner liner pressure increases when the temperature rises, the provision of the second inner liner 200 can reduce the pressure change of the first inner liner 100. It can be understood that the larger the volume of the second inner liner 200, the more obvious the effect of reducing the pressure change of the first inner liner 100.
[0055] Therefore, an electric water heater provided in an embodiment of the present application is provided with a second inner tank 200 connected to a first inner tank 100 for storing water. The second inner tank 200 is a cavity, thereby utilizing Boyle's law to provide expansion space for the hot water in the first inner tank 100, thereby preventing the pressure of the first inner tank 100 from being greater than the pressure relief pressure, thereby preventing the safety valve from releasing pressure and dripping, thereby improving user experience.
[0056] Specifically, refer to Figures 1 to 3 As shown, at least one first connection hole 110 is opened on one side of the first liner 100, and at least one second connection hole 210 corresponding to the first connection hole 110 is opened on one side of the second liner 200, and the first connection hole 110 and the second connection hole 210 are adaptably connected.
[0057] In this way, the first inner liner 100 and the second inner liner 200 are adapted and connected through the first connecting hole 110 and the second connecting hole 210, so that the connection between the two is stable and reliable, and the structure is simple and compact, and the sealing performance is easy to ensure.
[0058] Furthermore, the electric water heater provided in the embodiment of the present application further includes at least one connecting pipe 300 , and the first connecting hole 110 and the second connecting hole 210 are correspondingly connected through the connecting pipe 300 .
[0059] It can be imagined that by setting a connecting tube 300 to achieve the connection between the first connecting hole 110 and the second connecting hole 210, the opening positions of the first connecting hole 110 and the second connecting hole 210 can be made more flexible, so as to facilitate adjustment of the relative position relationship between the first inner liner 100 and the second inner liner 200, and subsequent installation and disassembly are more convenient and quick.
[0060] In some embodiments, reference Figures 1 to 4 As shown, the second inner liner 200 is located above the first inner liner 100 .
[0061] The second inner tank 200 is arranged above the first inner tank 100, so that the second inner tank 200 can use gravity to smoothly discharge into the second accommodating chamber 240, with good sealing and a stable and reliable structure. Specifically, when the water heater is filled with water, the water level is controlled in the first inner tank 100, so that the second accommodating chamber 240 of the second inner tank 200 is filled with air, providing sufficient expansion space for the water stored in the first inner tank 100, and also making the overall structure simple and compact, which is easy to implement.
[0062] In specific implementation, the electric water heater provided in the present application can be modified from a single-tank water heater by providing an additional second tank 200 connected to the first tank 100, or it can be modified from a double-tank water heater by providing the inlet and outlet water pipe assembly 500 and the heating assembly 400 in the lower first tank 100, so that the upper tank serves as the second tank 200.
[0063] Further, see Figure 2 and Figure 3 As shown, the extension direction of the second inner liner 200 is consistent with the extension direction of the first inner liner 100 .
[0064] The second inner tank 200 is arranged along the extension direction of the first inner tank 100, so as to reduce the occupation of the overall space of the water heater by the second inner tank 200 as much as possible, so that the overall structure of the water heater is more compact and convenient for disassembly and assembly.
[0065] And, refer to Figure 2 and Figure 3 As shown, the projection of the second inner container 200 toward the first inner container 100 is located inside the first inner container 100 .
[0066] It is easy to understand that such a configuration can make the axial and radial dimensions of the second inner tank 200 smaller than those of the first inner tank 100, effectively controlling the volume of the second inner tank 200, making the second inner tank 200 as small and lightweight as possible while ensuring the effectiveness of its function, thereby facilitating the overall structural design of the water heater.
[0067] In addition, a side of the second inner container 200 facing the first inner container 100 is an arc surface 220 , and the top of the arc surface 220 abuts against the first inner container 100 .
[0068] Since the second inner liner 200 is located above the first inner liner 100, the side of the second inner liner 200 facing the first inner liner 100 is set as an arc surface 220, which can make the water that expands due to heat and enters the second inner liner 200 more easily and fully discharged from the second inner liner 200 under the action of gravity, so that the second inner liner 200 remains in a cavity state.
[0069] Specifically, the second connection hole 210 and the connection pipe 300 can be arranged at the top of the arc surface 220, which is more conducive to the drainage of the second inner liner 200. The connection pipe 300 can be fixedly connected to the second connection hole 210 at the top of the arc, and plugged into the first connection hole 110 of the first inner liner 100.
[0070] In this way, when the electric water heater is in use, the second inner tank 200 can fully discharge the water that has entered inside, avoiding water accumulation in the second accommodating chamber 240 for a long time, reducing bacterial growth, making the use of the electric water heater safer and more hygienic, and improving user experience.
[0071] The arc surface 220 is in contact with the first inner tank 100 , and the first inner tank 100 can also provide a certain support for the second inner tank 200 , so that the overall structure of the electric water heater is more stable and reliable.
[0072] In addition, the side of the second inner container 200 away from the arc surface 220 is set as a horizontal surface 230, so as to further reduce the space occupied by the second inner container 200 and facilitate processing.
[0073] It should be noted that, in some embodiments, the volume of the second accommodating chamber 240 is greater than or equal to 2.09 times the volume of the water that expands and enters the second accommodating chamber 240, which is approximately 2 times.
[0074] Exemplarily, the gas volume inside the second accommodating chamber 240 in the initial state (cavity) is set to V1, and the corresponding temperature and pressure are T1 and P1. When the water in the first inner liner 100 expands due to heat and enters the second inner liner 200, and squeezes the gas in the second inner liner 200 to reach the pressure relief pressure of the safety valve, the corresponding gas volume is V2, and the corresponding temperature and pressure are T2 and P2.
[0075] According to actual tests, P1=0.3MPa, T1=277K (4°C), P2=0.72MPa, T2=348K (75°C).
[0076] Boyle's law V2=0.523V1, that is, the gas in the second inner liner 200 is compressed to 0.523 times of the original volume (the volume of the gas before compression is 2.09 times the volume of the gas after compression, about 2 times). The volume difference of the gas in the second inner liner 200 before and after compression is 0.477V1, and the volume difference of water due to thermal expansion is also 0.477 times the original volume of the gas in the second inner liner 200.
[0077] It can be concluded that in order to ensure that the safety valve does not release pressure, the pressure in the first inner liner 100 should not be greater than P2=0.72MPa, and the second inner liner 200 is connected to the first inner liner 100 and has the same pressure, that is, the pressure of the gas in the second inner liner 200 should not be greater than P2=0.72MPa. Therefore, the volume difference of the gas in the second inner liner 200 before and after compression should be greater than the volume difference before and after water expansion.
[0078] It is assumed that there is 60L of water in the first inner liner 100 after it is filled. According to the density of water at two temperatures of T1=277K (4°C) and T2=348K (75°C), the theoretical expansion of the water in the first inner liner 100 is 60×(0.99998-0.97484)=1508g, so 0.477V1>1.508L, then V1>3.161L, so the volume V1 of the gas before compression in the second accommodating chamber 240 should be greater than 3.161L, that is, the volume of the second accommodating chamber 240 should be greater than 3.161L.
[0079] To facilitate production and processing and to leave a certain margin, the volume of the second accommodating chamber 240 is 4L.
[0080] In addition, in some embodiments, the electric water heater provided in the embodiments of the present application further includes a shell, and the first inner tank 100 and the second inner tank 200 are both located in the shell;
[0081] The shell is filled with a foam material, such as foamed polyurethane, and the foam material covers the first inner liner 100 and the second inner liner 200 .
[0082] It can be understood that the first inner tank 100 and the second inner tank 200 are both arranged in the shell of the electric water heater, and the first inner tank 100 and the second inner tank 200 are coated with foam material, so that the foam material and the shell of the electric water heater can provide insulation effect for the second inner tank 200 to ensure the insulation performance of the entire electric water heater.
[0083] In this way, the second inner tank 200 can be completely embedded in the electric water heater as the second inner tank 200, so that it forms an integral whole in appearance, has a compact and beautiful structure, is easy to install, and saves space.
[0084] In addition, refer to Figures 1 to 3 The electric water heater provided in the embodiment of the present application also includes an inlet and outlet water pipe assembly 500, which includes an inlet pipe 510, an outlet pipe 520 and a safety valve. The inlet pipe 510 and the outlet pipe 520 are inserted on the same side of the first inner tank 100, and are partially located in the first accommodating cavity 120. The safety valve is arranged on the inlet pipe 510 and is connected to the inlet pipe 510.
[0085] The water inlet and outlet pipe assembly 500 can realize the water filling and water use functions of the electric water heater, wherein the safety valve is arranged on the water inlet pipe 510 and is connected to the water inlet pipe 510 .
[0086] In this way, when the heating component 400 heats the first inner pot 100, the water in the first inner pot 100 expands, and the overall pressure of the first inner pot 100 and the second inner pot 200 increases, but is always lower than the pressure relief pressure of the safety valve to avoid dripping of the safety valve.
[0087] In addition, a pressure detection component can be set in the first accommodating chamber 120 of the first inner tank 100 to monitor the pressure of the first accommodating chamber 120 in real time, so that corresponding measures can be taken in time when the pressure is too high due to the thermal expansion of the water stored in the inner tank.
[0088] In summary, the electric water heater provided in the embodiment of the present application is connected with the second inner tank 100 by setting the first inner tank 100, so that the first accommodating cavity 120 of the first inner tank 100 and the second accommodating cavity 240 of the second inner tank 200 form a closed container. The first inner tank 100 serves as a water storage tank for the electric water heater, so that the first accommodating cavity 120 is filled with water, and the part of the space not filled with water is filled with gas by itself, and the second accommodating cavity 240 is set as a cavity, that is, the second accommodating cavity 240 is also filled with gas, usually air.
[0089] As the water temperature rises, the water in the first inner liner 100 will expand, and the gas in the first inner liner 100 and the second inner liner 200 will be forced to compress, so that the second inner liner 200 reduces the pressure change of the first inner liner 100. It can be understood that the larger the volume of the second inner liner 200, the more obvious the effect of reducing the pressure change of the first inner liner 100.
[0090] Therefore, Boyle's law can be used to provide expansion space for the hot water in the first inner tank 100 to avoid the pressure of the first inner tank 100 being greater than the pressure relief pressure, thereby preventing the safety valve from releasing pressure and dripping, thereby improving user experience.
[0091] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An electric water heater, characterized in that: It comprises a first inner pot, a second inner pot and a heating assembly, wherein the first inner pot and the second inner pot respectively have a first accommodating cavity and a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are communicated, and the heating assembly is arranged in the first accommodating cavity; The second liner is configured such that when the water in the first accommodating chamber is heated by the heating component, the water expands and partially enters the second accommodating chamber, so that the water pressure in the first accommodating chamber is not greater than the pressure relief pressure of the first accommodating chamber.
2. The electric water heater according to claim 1, characterized in that: At least one first connection hole is formed on one side of the first liner, and at least one second connection hole corresponding to the first connection hole is formed on one side of the second liner, and the first connection hole and the second connection hole are adaptively connected.
3. The electric water heater according to claim 2, characterized in that: It also includes at least one connecting pipe, and the first connecting hole and the second connecting hole are correspondingly connected through the connecting pipe.
4. The electric water heater according to claim 1, characterized in that: The second inner container is located above the first inner container.
5. The electric water heater according to claim 4, characterized in that: An extension direction of the second inner container is consistent with an extension direction of the first inner container.
6. The electric water heater according to claim 5, characterized in that: A projection of the second inner container toward the first inner container is located inside the first inner container.
7. The electric water heater according to claim 4, characterized in that: A side of the second inner container facing the first inner container is an arc-shaped surface, and the top of the arc-shaped surface abuts against the first inner container.
8. The electric water heater according to any one of claims 4 to 7, characterized in that: The volume of the second accommodating chamber is greater than or equal to twice the volume of water entering the second accommodating chamber.
9. The electric water heater according to any one of claims 4 to 7, characterized in that: It also includes a shell, wherein the first liner and the second liner are both located in the shell; The shell is filled with a foam material, and the foam material covers the first inner liner and the second inner liner.
10. The electric water heater according to any one of claims 1 to 7, characterized in that: It also includes an inlet and outlet water pipe assembly, which includes an inlet pipe, an outlet pipe and a safety valve. The inlet pipe and the outlet pipe are inserted on the same side of the first inner tank and are partially located in the first accommodating cavity. The safety valve is arranged on the inlet pipe and is connected to the inlet pipe.