Heat exchange type electric water heater

Abstract

The utility model discloses a heat exchange type electric water heater which comprises a shell, a water tank, a heat exchange assembly, a first heater, a second heater, a third heater and a thermostatic valve, the water tank, the heat exchange assembly, the first heater, the second heater, the third heater and the thermostatic valve are arranged in the shell, a liquid inlet is formed in the side face, close to the top end, of the water tank or the bottom of the water tank, and the first heater is arranged at the bottom in the water tank. The heat exchange assembly is arranged in the water tank, the second heater, the third heater and the thermostatic valve are arranged outside the water tank, a first water inlet and a first water outlet are formed in the bottom of the shell, and the thermostatic valve is provided with a first water inlet, a second water inlet and a first water outlet. The first water inlet communicates with the water inlet and the water inlet end of the heat exchange assembly to form a first pipeline. The water heater is of a structure that running water is heated and used immediately after being used, water storage is not needed, the situation that bacteria breed in the stored dead water is avoided, meanwhile, the situation that water is polluted due to impurity precipitation is avoided, and the cleanliness of the used water is improved.

Description

Technical Field

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

[0002] Some storage-type electric water heaters on the market use a storage-type heating method, and the water stored is mostly stagnant water, which is prone to breeding bacteria and is not conducive to hygiene. At the same time, impurities will precipitate when the water is left standing, further contaminating the water in the water tank.

[0003] Therefore, the existing technology is insufficient and needs to be improved. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present invention is that the stored water is mostly stagnant water, which is prone to breeding bacteria and precipitation of impurities, which will further pollute the water in the water tank.

[0005] In order to solve the above problems, an embodiment of the present invention provides a heat exchange electric water heater, including an outer shell and a water tank arranged in the outer shell, a heat exchange component, a first heater, a second heater, a third heater, and a thermostatic valve. A liquid inlet is provided on the side of the water tank near the top or at the bottom of the water tank, the first heater is provided at the bottom of the water tank, the heat exchange component is provided in the water tank, the second heater, the third heater and the thermostatic valve are provided outside the water tank, a first water inlet and a first water outlet are provided at the bottom of the outer shell, the thermostatic valve is provided with water inlet 1, water inlet 2 and water outlet 1, the water inlet 1 is respectively connected with the water inlet and the water inlet end of the heat exchange component and form pipeline 1, the water inlet 2 is connected with the water outlet end of the heat exchange component and form pipeline 2, the water outlet 1 is connected with the first water outlet and form pipeline 3, the second heater and the third heater are respectively provided on any two pipelines of pipeline 1, pipeline 2 and pipeline 3.

[0006] Optionally, the second heater is arranged on pipeline one, and the third heater is arranged on pipeline three.

[0007] Optionally, a thermal insulation layer is provided on the outside of the water tank.

[0008] Optionally, a liquid outlet pipe is further provided on the water tank above the liquid inlet or at the bottom of the water tank.

[0009] Optionally, the water tank is made of stainless steel.

[0010] Optionally, the second heater and the third heater are overflow heaters.

[0011] Optionally, the heat exchange component is a plate heat exchanger or a tube heat exchanger.

[0012] Optionally, the insulation layer is made of foam, rubber-plastic cotton, or glass fiber cotton.

[0013] Optionally, the height of the heat exchange component is lower than the height of one end of the liquid outlet pipe in the water tank.

[0014] Optionally, the shell is made of stainless steel.

[0015] Compared with the prior art, the technical effects achieved by the embodiments of the present invention include:

[0016] The embodiment of the present utility model is a structure in which live water can be heated and used immediately. There is no need to store water, and bacteria will not grow in the stored stagnant water. At the same time, impurities will not precipitate and pollute the water quality, which is beneficial to improving the cleanliness of the water used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 The figure is a simplified structural diagram of a heat exchange electric water heater.

[0021] Figure 2 This is a schematic diagram of the liquid flow direction of a heat exchange electric water heater.

[0022] Figure 3 An embodiment of setting positions for the second heater and the third heater.

[0023] Figure 4 Another embodiment of setting positions for the second heater and the third heater.

[0024] Figure 5 This is an embodiment in which an additional heater structure is provided.

[0025] Figure 6 This is an embodiment of the location of the liquid inlet and the liquid outlet.

[0026] Reference numerals

[0027] 1. Outer shell; 2. Water tank; 3. Heat exchange component; 4. First heater; 5. Second heater; 6. Third heater; 7. Thermostatic valve; 8. First water inlet; 9. First water outlet; 10. Water inlet 1; 11. Water inlet 2; 12. Water outlet 1; 13. Pipeline 1; 14. Pipeline 2; 15. Pipeline 3; 16. Liquid inlet; 17. Liquid outlet; 18. Insulation layer. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Similar component numbers in the drawings represent similar components. Obviously, the embodiments described below are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0030] It should also be understood that the terms used in this specification of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the specification of the embodiments of the present invention and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0031] See also Figure 1-2An embodiment of the present invention provides a heat exchange electric water heater, comprising a shell 1 and a water tank 2, a heat exchange component 3, a first heater 4, a second heater 5, a third heater 6, and a thermostatic valve 7, wherein the first heater 4 is arranged at the bottom of the water tank 2, the heat exchange component 3 is arranged in the water tank 2, the second heater 5, the third heater 6 and the thermostatic valve 7 are arranged outside the water tank 2, a first water inlet 8 and a first water outlet 9 are opened at the bottom of the shell 1, the thermostatic valve 7 is provided with a water inlet 10, a water inlet 2 11 and a water outlet 12, the water inlet 10 is respectively connected with the water inlet and the water inlet end of the heat exchange component 3 and form a pipeline 13, the water inlet 2 11 is connected with the water outlet end of the heat exchange component 3 and form a pipeline 2 14, the water outlet 12 is connected with the first water outlet 9 and form a pipeline 3 15, the second heater 5 is arranged on the pipeline 13, and the third heater 6 is arranged on the pipeline 3 15. The first heater 4 is arranged at the bottom of the water tank 2 to improve the heating efficiency; the second heater 5 and the third heater 6 are overflow heaters. The heat exchange component 3 of the present invention is a tubular heat exchanger or a plate heat exchanger, which can be selected according to actual conditions.

[0032] Please continue reading Figure 1 , a liquid inlet 16 is provided on the side of the water tank 2 near the top, and the liquid inlet 16 can be fed with water or other heat transfer liquids with high specific heat capacity. Figure 3-5 , including but not limited to this, the second heater 5 can also be set on pipeline 2 14 or pipeline 3 15, the third heater 6 can also be set on pipeline 1 13 or pipeline 2 14, or a heater structure (unnumbered) can be set on another pipeline where the second heater 5 and the third heater 6 are not, as long as the water can be heated multiple times to achieve rapid hot water supply.

[0033] When the heat exchange electric water heater is in use, liquid is introduced through the liquid inlet 16 and does not pass through the heat exchange component 3. The first heater 4 heats the liquid, and the temperature in the water tank 2 continues to rise; the first water inlet 8 supplies colder water to the heat exchange component 3 and the thermostatic valve 7. The water passing through the heat exchange component 3 continuously exchanges heat with the liquid in the water tank 2 in the water tank 2, and the temperature continues to rise and flows to the water inlet 2 11 of the thermostatic valve 7. The second heater 5 heats the water diverted from the first water inlet 8. The water at the water inlet 10 and the water at the water inlet 2 11 flow out and are heated by the third heater 6 during the outflow process. The cold water at the first water inlet 8 is heated in a variety of ways, so that its temperature can quickly reach the temperature required by the user. At the same time, water at the required temperature can also be continuously provided, avoiding the problem of insufficient hot water.

[0034] Please continue reading Figure 1A liquid outlet pipe 17 is also provided on the water tank 2 above the liquid inlet 16, giving the water tank 2 an open structure. The provision of the liquid outlet pipe 17 allows the liquid from the liquid inlet 16 to flow out naturally when the water level reaches the full level. The water tank 2 and its internal components do not need to withstand the pressure of the incoming water or the expansion pressure of the heated water, effectively extending the product life and reducing replacement costs. Preferably, the height of the heat exchange component 3 is lower than the height of one end of the liquid outlet pipe 17 within the water tank 2. This arrangement allows the heat exchange component 3 to be completely immersed in the liquid, which is beneficial to improving heat exchange efficiency.

[0035] Please continue reading Figure 1 The water tank 2 and the housing 1 of the present invention are made of stainless steel, which has the advantages of good corrosion resistance, good durability and easy cleaning.

[0036] Please continue reading Figure 1 An insulation layer 18 is provided on the outside of the water tank 2. The setting of the insulation layer 18 reduces the speed at which the temperature in the water tank 2 dissipates, so that even if the power supply is stopped for a period of time after use, the user can obtain water with a temperature higher than the water supply temperature through this structure, thereby improving the user's usage experience and reducing the possibility of the user being cooled by the water; preferably, the material of the insulation layer 18 is foam material, rubber-plastic cotton, glass fiber cotton, ESP material, vacuum insulation board, etc.

[0037] See also Figure 6 The liquid inlet 16 and the liquid outlet pipe 17 can also be set at the bottom of the water tank 2, including but not limited to this, as long as the liquid can enter from the liquid inlet 16, the height of one end of the liquid outlet pipe 17 in the water tank 2 is higher than the heat exchange component 3, and the liquid flows out naturally when the full water level is reached.

[0038] Compared with the prior art, the technical effects achieved by the embodiments of the present invention include:

[0039] The embodiment of the present utility model is a structure in which live water can be heated and used immediately. There is no need to store water, and bacteria will not grow in the stored stagnant water. At the same time, impurities will not precipitate and pollute the water quality, which is beneficial to improving the cleanliness of the water used.

[0040] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0043] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0045] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0046] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, as long as these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

[0047] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A heat exchange electric water heater, characterized in that: It includes an outer shell and a water tank arranged in the outer shell, a heat exchange component, a first heater, a second heater, a third heater, and a thermostatic valve. A liquid inlet is provided on the side of the water tank near the top or at the bottom of the water tank. The first heater is provided at the bottom of the water tank, the heat exchange component is provided in the water tank, the second heater, the third heater and the thermostatic valve are provided outside the water tank, a first water inlet and a first water outlet are provided at the bottom of the outer shell, the thermostatic valve is provided with water inlet 1, water inlet 2 and water outlet 1, the water inlet 1 is respectively connected with the water inlet and the water inlet end of the heat exchange component to form pipeline 1, the water inlet 2 is connected with the water outlet end of the heat exchange component to form pipeline 2, the water outlet 1 is connected with the first water outlet to form pipeline 3, and the second heater and the third heater are respectively provided on any two pipelines of pipeline 1, pipeline 2 and pipeline 3.

2. The heat exchange electric water heater according to claim 1, characterized in that: The second heater is arranged on pipeline one, and the third heater is arranged on pipeline three.

3. The heat exchange electric water heater according to claim 1, characterized in that: A heat-insulating layer is provided on the outside of the water tank.

4. The heat exchange electric water heater according to claim 1, characterized in that: A liquid outlet pipe is also provided on the water tank above the liquid inlet or at the bottom of the water tank.

5. The heat exchange electric water heater according to claim 1, characterized in that: The water tank is made of stainless steel.

6. The heat exchange electric water heater according to claim 1, characterized in that: The second heater and the third heater are overflow heaters.

7. The heat exchange electric water heater according to claim 1, characterized in that: The heat exchange component is a plate heat exchanger or a tube heat exchanger.

8. The heat exchange electric water heater according to claim 3, characterized in that: The insulation layer is made of foam material, rubber-plastic cotton, and glass fiber cotton.

9. The heat exchange electric water heater according to claim 4, characterized in that: The height of the heat exchange component is lower than the height of one end of the liquid outlet pipe in the water tank.

10. The heat exchange electric water heater according to claim 1, characterized in that: The shell is made of stainless steel.

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