Open-type electric water heater

Abstract

The utility model relates to the field of water heaters, and provides an open-type electric water heater which comprises a box body and a heating assembly, and the box body is provided with a liquid storage space; the heating assembly is connected with the box body and suitable for heating liquid in the liquid storage space, the heating assembly comprises a heating piece and a heat dissipation piece, and the heat dissipation piece is installed on the heating piece and suitable for increasing the heat dissipation area of the heating assembly. The heat dissipation piece is arranged on the heating piece, so that the heat dissipation area of the heating assembly is increased, heat exchange between the heating assembly and liquid in the liquid storage space is improved, the temperature difference between the liquid near the surface of the heating assembly and the liquid at other positions in the liquid storage space is prevented from being too large, and the temperature of the liquid near the surface of the heating assembly is prevented from rapidly reaching or approaching the boiling point; the problem that liquid near the surface of the heating assembly reaches the boiling point is solved, the time that the liquid reaches the boiling point is delayed, the number of the bubbles generated by the liquid on the surface of the heating assembly is reduced, and then noise generated in the using process of the electric water heater is reduced.

Description

Technical Field

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

[0002] In the related art, since the pressure in the liquid storage space of an open electric water heater is constant, there is a problem that the liquid in the liquid storage space is prone to generate bubbles on the surface of the heating component, and the bursting of the bubbles causes excessive noise when the electric water heater is used. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model proposes an open electric water heater, which increases the heat dissipation area of ​​the heating component by means of a heat dissipation member, so that the water in the liquid storage space is heated uniformly as a whole, and the timing of the generation and explosion of bubbles on the surface of the heating component is delayed, so as to reduce the noise when the electric water heater is used.

[0004] The open electric water heater according to the embodiment of the utility model comprises:

[0005] The box body is provided with a liquid storage space;

[0006] A heating component is connected to the box body and is suitable for heating the liquid in the liquid storage space. The heating component includes a heating element and a heat dissipation element. The heat dissipation element is installed on the heating element and is suitable for increasing the heat dissipation area of ​​the heating component.

[0007] According to the open electric heater of the embodiment of the utility model, the liquid in the liquid storage space is heated by the heating component to form a high-temperature liquid that flows out of the liquid storage space for use by the user.

[0008] According to the open-type electric water heater of the embodiment of the utility model, a heat sink is arranged on the heating element, so that the heat dissipation area of ​​the heating component is increased, and the heat exchange between the heating component and the liquid in the liquid storage space is improved, so as to avoid excessive temperature difference between the liquid near the surface of the heating component and the liquid at other positions in the liquid storage space, and prevent the temperature of the liquid near the surface of the heating component from reaching or approaching the boiling point quickly, resulting in a large number of bubbles being generated on the surface of the heating component. The timing of the liquid near the surface of the heating component reaching the boiling point is delayed, and the number of bubbles generated by the liquid on the surface of the heating component is reduced, thereby reducing the noise generated during the use of the electric water heater.

[0009] According to an embodiment of the present invention, the distance between the heating component and the inner wall of the box body is greater than or equal to 30 mm.

[0010] According to an embodiment of the utility model, the heating element includes a heating tube, the heat sink is a heat sink, the heat sink is provided with a first sleeve, and the first sleeve is sleeved on the heating tube.

[0011] According to an embodiment of the present utility model, the heat dissipation plate includes two heat dissipation sub-plates, the heat dissipation sub-plates are provided with arc-shaped portions, and the two arc-shaped portions are combined to form the first sleeve.

[0012] According to an embodiment of the utility model, the heating tube includes at least two parallel straight line segments, and the heat dissipation plate is provided with a first sleeve corresponding to the straight line segments.

[0013] According to an embodiment of the present utility model, the heat sink includes heat sink fins, and the heat sink fins extend outward from the heating element.

[0014] According to an embodiment of the present utility model, the heat dissipation fins are spiral fins, and the spiral fins extend in a spiral along the extension direction of the heating element.

[0015] According to an embodiment of the utility model, the heat dissipation fin further includes a second sleeve, and the second sleeve is sleeved on the heating element.

[0016] According to one embodiment of the utility model, the heat dissipation fin includes a plurality of fin units, the fin unit includes at least one sleeve portion and at least one fin portion, the first end of the fin portion is connected to the sleeve portion, and the second end extends away from the sleeve portion, and the fin unit is sleeved on the heating element through the sleeve portion.

[0017] According to an embodiment of the present utility model, the heating element is a heating tube, and the heating tube includes at least one straight section, and the straight section is sleeved with a plurality of the fin units.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is one of the structural schematic diagrams of the heating assembly provided in the embodiment of the utility model;

[0021] Figure 2 This is the second structural schematic diagram of the heating assembly provided by the embodiment of the utility model;

[0022] Figure 3It is a structural schematic diagram of a heat dissipation sub-plate of a heating assembly provided in an embodiment of the utility model;

[0023] Figure 4 This is the third structural schematic diagram of the heating assembly provided by the embodiment of the utility model;

[0024] Figure 5 This is the fourth structural schematic diagram of the heating assembly provided in the embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the spiral fins of the heating assembly provided in the embodiment of the utility model;

[0026] Figure 7 This is the fifth structural diagram of the heating assembly provided by the embodiment of the utility model;

[0027] Figure 8 This is the sixth structural diagram of the heating assembly provided by the embodiment of the utility model;

[0028] Fig. 9 It is a structural schematic diagram of a fin unit of a heating assembly provided in an embodiment of the utility model;

[0029] Fig.10 It is a structural schematic diagram of an open electric water heater provided by an embodiment of the utility model.

[0030] Reference numerals:

[0031] 100, box body; 110, liquid storage space; 120, exhaust port; 160, valve; 141, liquid filling port; 142, liquid outlet; 143, liquid inlet;

[0032] 20, heating assembly; 200, heating element; 201, heating tube; 202, straight section; 210, heat sink; 211, heat sink; 212, first sleeve; 213, heat sink; 214, arc portion; 215, heat sink fin; 216, second sleeve; 217, fin unit; 218, sleeve portion; 219, fin portion;

[0033] 300. Heat exchanger;

[0034] 400, liquid level detector;

[0035] 500. Pressure testing parts;

[0036] 610, first three-way valve; 620, second three-way valve; 630, drain valve; 640, water supply valve. DETAILED DESCRIPTION

[0037] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0038] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0040] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0042] Combination Figure 1 and Fig.10 As shown, the open electric water heater according to the embodiment of the utility model includes a box body 100 and a heating component 20. The box body 100 is provided with a liquid storage space 110. The heating component 20 is connected to the box body 100 and is suitable for heating the liquid in the liquid storage space 110. The heating component 20 includes a heating element 200 and a heat sink 210. The heat sink 210 is installed on the heating element 200 and is suitable for increasing the heat dissipation area of ​​the heating component 20.

[0043] According to the open type electric water heater of the embodiment of the utility model, the liquid in the liquid storage space 110 is heated by the heating assembly 20 to form a high-temperature liquid that flows out of the liquid storage space 110 for use by the user.

[0044] It should be noted that, in the open-type electric water heater in the related art, the liquid storage space 110 is usually connected to the outside to ensure that the pressure in the liquid storage space 110 is close to the external atmospheric pressure, so as to reduce the additional pressure on the inner wall of the box body 100. Therefore, the box body 100 does not need to be set to a pressure-bearing shape (such as a barrel shape) of the liquid storage electric water heater, and then the space utilization rate of the bathroom can be improved by changing the shape of the box body 100 (such as forming a flat structure and setting it in the space above the ceiling).

[0045] However, since the pressure in the liquid storage space 110 of the open electric water heater is lower than that of the liquid storage electric water heater, the boiling point of the liquid in the liquid storage space 110 is also lower than that of the liquid in the liquid storage electric water heater. Therefore, when heated to the same set temperature, the liquid in the open electric water heater is closer to its boiling point. Accordingly, more bubbles are generated in the liquid during the heating process, and the bursting of the bubbles causes the open electric water heater to emit louder noise than the liquid storage electric water heater.

[0046] According to the open-type electric water heater of the embodiment of the utility model, by arranging the heat dissipation element 210 on the heating element 200, the heat dissipation area of ​​the heating component 20 is increased, and the heat exchange between the heating component 20 and the liquid in the liquid storage space 110 is improved, so as to avoid excessive temperature difference between the liquid near the surface of the heating component 20 and the liquid at other positions in the liquid storage space 110, and prevent the liquid temperature near the surface of the heating component 20 from reaching or approaching the boiling point quickly, resulting in a large number of bubbles being generated on the surface of the heating component 20. The timing of the liquid near the surface of the heating component 20 reaching the boiling point is delayed, and the number of bubbles generated by the liquid on the surface of the heating component 20 is reduced, thereby reducing the noise generated during the use of the electric water heater.

[0047] In this embodiment, the box 100 is a cubic structure; of course, the shape of the box 100 can be adaptively adjusted based on different installation spaces, such as using a pancake-shaped box 100 to fit the space above the ceiling.

[0048] In this embodiment, a liquid inlet 143 and a liquid outlet 142 are also provided on the box body 100. The liquid in the liquid storage space 110 may be water. Low-temperature water from an external water source enters the liquid storage space 110 from the liquid inlet 143, is heated by the heating component 20, and is discharged from the liquid outlet 142 for use by the user.

[0049] According to one embodiment of the utility model, combined Fig.10 As shown, the distance h between the heating component 20 and the inner wall of the housing 100 is greater than or equal to 30 mm. During the use of the electric water heater, the heating component 20 usually generates a certain degree of vibration, mainly due to its contact with the liquid and the thermal expansion and contraction effect during the heating process, as well as possible factors such as liquid flow. By setting the heating component 20 to maintain a certain distance from the inner wall of the housing 100, the vibration of the heating component 20 will not resonate with the housing 100, thereby improving the safety of the electric water heater and reducing noise.

[0050] In other embodiments, the distance between the heating component 20 and the inner wall of the box 100 can be adaptively adjusted according to the vibration magnitude of the heating component 20 during use to ensure that the heating component 20 and the box 100 do not resonate.

[0051] According to one embodiment of the utility model, combined Figure 1 and Figure 2As shown, the heating element 200 includes a heating tube 201, and the heat sink 210 is a heat sink 211. The heat sink 211 is provided with a first sleeve 212, and the first sleeve 212 is sleeved on the heating tube 201. The plate surface extended by the heat sink 211 effectively increases the heat dissipation area of ​​the heating component 20; at the same time, the first sleeve 212 can be sleeved along the heating tube 201, and after being sleeved to a set position, the heat sink 211 and the heating tube 201 can be fixed by welding, which reduces the manufacturing difficulty of the heating component 20 and improves the connection stability of the heat sink 211 and the heating tube 201.

[0052] In this embodiment, the heat dissipation area of ​​the heating component 20 can be increased by lengthening the extension length or the diameter of the heating tube 201 .

[0053] In other embodiments, the heating element 200 may also be a heating wire, a heating plate, etc.

[0054] In this embodiment, the plate surface of the heat dissipation plate 211 extends in the horizontal direction ( Figure 2 The horizontally extending plate surface allows bubbles formed on the surface of the heating component 20 to gather on the plate surface of the heat sink 211 facing away from the liquid surface, thereby reducing the number of bubbles that float to the liquid surface and burst, thereby reducing the fluctuation of the liquid level in the liquid storage space 110 and the generation of noise.

[0055] According to one embodiment of the utility model, combined Figures 1 to 3 As shown, the heat sink 211 includes two heat sink sub-plates 213, and the heat sink sub-plates 213 are provided with arc-shaped portions 214, and the two arc-shaped portions 214 are matched to form a first sleeve 212. In this embodiment, when the heat sink 211 is installed, the arc-shaped portions 214 of the two heat sink sub-plates 213 are arranged oppositely and matched to be sleeved on the heating tube 201, and before the heat sink sub-plates 213 are welded to the heating tube 201, the heat sink sub-plates 213 are pressed tightly to the heating tube 201 to ensure the fit between the two, reduce the generation of gaps, and improve the heat transfer effect between the heating tube 201 and the heat sink 211.

[0056] In this embodiment, the arc portion 214 can be set to adapt to the surface shape of the heating tube 201. For example, if the cross-section of the heating tube 201 is circular, the corresponding arc portion 214 is a semicircular arc surface or a circular arc surface; of course, the arc portion 214 can also be set to have a "V" shape in cross-section, which can clamp the heating tube 201.

[0057] The matched heat dissipation sub-plates 213 can form a first sleeve 212 with different curvatures and extension paths, and thus can be adapted to heating tubes 201 with different extension forms, such as an arc-shaped heating tube 201; in other embodiments, the extension forms of the heat dissipation plate 211 and the heating tube 201 can be adjusted according to user needs.

[0058] According to one embodiment of the utility model, combined Figure 2 As shown, the heating tube 201 includes at least two parallel straight segments 202, and the heat sink 211 is provided with a first sleeve 212 corresponding to the straight segments 202. The arrangement of the straight segments 202 makes the sleeve path of the first sleeve 212 a straight line, and the shape of the first sleeve 212 does not change suddenly along the extension direction of the straight segments 202, which is convenient for processing and manufacturing; and the two parallel straight segments 202 make it possible for the heat sink sub-plate 213 to be pre-fixed when it is installed on the heating tube 201 by the staff by overlapping the heat sink sub-plate 213 above the heating tube 201 on the heating tube 201, without the need to hold the heat sink sub-plate 213 all the time, which effectively reduces the difficulty of welding the two heat sink sub-plates 213 and the heating tube 201 to each other, and improves the manufacturing efficiency of the heating assembly 20.

[0059] In other embodiments, the number of heating tubes 201 and the number of straight segments 202 of the heating tubes 201 can be adaptively adjusted according to the actual usage requirements of the heating component 20, and the number of first sleeves 212 of the heat sink 211 can be used as a subset of the number of straight segments 202. For example, when four parallel straight segments 202 are set, a heat sink 211 with two first sleeves 212 can be installed, or a heat sink 211 with three first sleeves 212 can be installed.

[0060] According to one embodiment of the utility model, combined Figure 4 and Figure 7 As shown, the heat sink 210 includes heat sink fins 215, which extend outward from the heating element 200. A plurality of heat sink fins 215 are placed along the extension direction of the heating element 200, effectively increasing the heat dissipation area of ​​the heating component 20, and compared with the heat sink 211, the entire surface of the heat sink fins 215 is closer to the center of the heating element 200, which accordingly ensures that the temperature of the heating element 200 is close to the temperature of the heat sink fins 215, effectively improving the heating uniformity of the liquid around the heating component 20, and avoiding the problem of excessively high local liquid temperature, which is closer to the boiling point and causes a large number of bubbles to be generated.

[0061] According to one embodiment of the utility model, combined Figure 5 and Figure 6 As shown, the heat dissipation fin 215 is a spiral fin, and the spiral fin extends in a spiral direction along the extension direction of the heating element 200. The spiral fin can provide a larger heat exchange surface area in a limited space; the spiral fin is usually manufactured as an integral component, so they are usually easier to install and maintain than other forms of heat dissipation elements 210; the staff connects the spiral fin to the heating element 200 by spinning, and during the use of the heating component 20, due to the thermal expansion and contraction of the heating element 200 itself, the heating element 200 will expand and fit closely with the spiral fin, reducing the generation of gaps and improving the heat transfer effect between the heating element 200 and the spiral fin.

[0062] According to one embodiment of the utility model, combined Figures 7 to 9 As shown, the heat dissipation fin 215 also includes a second sleeve 216, and the second sleeve 216 is sleeved on the heating element 200. The second sleeve 216 can be sleeved along the heating element 200, and after being sleeved to a set position, the heat dissipation fin 215 and the heating element 200 can be fixed by welding, positioning members, etc., and during the use of the heating assembly 20, due to the thermal expansion and contraction of the heating element 200 itself, the heating element 200 will expand and fit closely with the second sleeve 216, thereby reducing the generation of gaps and improving the heat transfer effect between the heating element 200 and the heat dissipation fin 215.

[0063] According to one embodiment of the utility model, combined Figures 7 to 9 As shown, the heat dissipation fin 215 includes a plurality of fin units 217, and the fin unit 217 includes at least one sleeve portion 218 and at least one fin portion 219. The first end of the fin portion 219 is connected to the sleeve portion 218, and the second end extends away from the sleeve portion 218. The fin unit 217 is sleeved on the heating element 200 through the sleeve portion 218.

[0064] During installation, the staff will connect the fin units 217 to the heating element 200 one by one. The separately arranged fin units 217 allow the staff to adjust the number of fin units 217 that need to be connected according to the lengths of the different heating elements 200. The staff does not need to separately manufacture different types of heat dissipation fins 215 for heating elements 200 of different lengths. This improves the adaptability of the heat dissipation fins 215 to the heating element 200 and effectively reduces the manufacturing cost of the heating assembly 20.

[0065] In this embodiment, the fin unit 217 includes a sleeve portion 218 and a fin portion 219, and the sleeve portion 218 extends outward from one side of the fin portion 219; of course, the sleeve portion 218 can also be provided in a form in which the sleeve portion 218 extends outward from two opposite sides of the fin portion 219 respectively; in other embodiments, the fin unit 217 can also include different numbers of sleeve portions 218 and fin portions 219, such as two fin portions 219 can be connected to one sleeve portion 218, to ensure that when the fin units 217 abut against the fin units 217, there is a certain gap between the fin portions 219.

[0066] According to one embodiment of the utility model, combined Figures 7 to 9 As shown, the heating element 200 is a heating tube 201, and the heating tube 201 includes at least one straight section 202, and the straight section 202 is sleeved with a plurality of fin units 217. The straightness setting makes the diameters of the sleeve portions 218 of the fin units 217 sleeved on the straight section 202 the same, forming standardized fin units 217, thereby improving the production efficiency of the fin units 217 and the installation efficiency of the heating assembly 20.

[0067] In this embodiment, the heating assembly 20 has two heating tubes 201, each of which is provided with two straight segments 202 and a "U"-shaped segment, the "U"-shaped segment connects the two straight segments 202, and when the fin unit 217 is sleeved on the straight segment 202, the connection between the "U"-shaped segment and the straight segment 202 can form a limit for the movement of the fin unit 217 along the straight segment 202. Of course, more heating tubes 201 can also be provided on the heating assembly 20 to increase the heating power of the heating assembly 20.

[0068] Combination Fig.10 As shown, according to one embodiment of the utility model, the exhaust port 120 of the open electric water heater is provided with a valve 160, which is suitable for closing when the actual pressure value above the liquid level in the liquid storage space 110 is less than the set pressure value, and opening when the actual pressure value is greater than or equal to the set pressure value.

[0069] During the process of heating the liquid in the liquid storage space 110 of the heating component 20, the liquid expands due to the heat, and part of the liquid is converted into steam and stored in the space above the liquid surface, causing the actual pressure value in the liquid storage space 110 to continue to rise. When the actual pressure value continues to rise to reach the set pressure value, the valve 160 opens, and the steam in the liquid storage space 110 is discharged through the valve 160, thereby reducing the actual pressure value in the liquid storage space 110 and avoiding damage to the box body 100.

[0070] The closure of valve 160 seals the liquid storage space 110 so that the liquid can be heated at a certain pressure to increase the boiling point of the liquid in the liquid storage space 110. Increasing the boiling point allows the temperature of the liquid in the liquid storage space 110 to be further away from the boiling point when heated to the same set temperature, thereby delaying the generation of bubbles in the liquid, avoiding noise caused by bubble bursting, and improving user experience.

[0071] In this embodiment, the set pressure value is 0.1 MPa, which can avoid the set pressure value in the liquid storage space 110 being too small to generate noise, and will not affect the inner wall of the box body 100; of course, based on different materials of the box body 100, such as a box body 100 with better pressure-bearing performance, the set pressure value can be adaptively increased to further avoid the generation of noise in the liquid storage space 110.

[0072] According to one embodiment of the utility model, combined Fig.10As shown, the box 100 is provided with a pressure detection member 500, which is suitable for detecting the actual pressure value. The actual pressure value detected by the pressure detection member 500 can be intuitively prompted to the user in the form of a lifting component, such as a display component that can be a display (displaying the actual pressure value), a light component (a green light represents that the set pressure value has not been reached, and a red light represents that the set pressure value has been reached), a sound component (voice broadcasting the actual pressure value), etc.

[0073] In this embodiment, the pressure detection component 500 can be a pressure gauge, a pressure switch, etc.

[0074] In one embodiment, valve 160 is a pressure valve 160, which is usually composed of a small number of mechanical parts, with a relatively simple structure and high reliability. The opening and closing of valve 160 is adjusted by a mechanical device according to the change of the actual pressure value in the liquid storage space 110. When the pressure exceeds the set pressure value, valve 160 will automatically open or close. Due to its simple mechanical structure and the absence of the need for an external power supply, pressure valve 160 performs better in some environments with harsh conditions and high reliability requirements. Pressure valve 160 can be used for various liquids to improve the adaptability of electric water heaters.

[0075] In one embodiment, the valve 160 is an electric valve 160, and the open electric water heater also includes a first comparison circuit, the input end of the first comparison circuit is connected to the pressure detection element 500, and the output end of the first comparison circuit is communicated with the electric valve 160. The first comparison circuit is suitable for receiving an actual pressure value and comparing it with a set pressure value, and outputting a first trigger signal when the actual pressure value is greater than or equal to the set pressure value, and outputting a second trigger signal when the actual pressure value is less than the set pressure value; the electric valve 160 is suitable for opening when the first trigger signal is received.

[0076] In this embodiment, the electric valve 160 can be automatically controlled by the first comparison circuit without manual intervention. This enables the system to automatically adjust the opening degree of the valve 160 according to the set pressure value or the trigger signal, thereby improving the stability and efficiency of the system; the electric valve 160 can also be integrated with the alarm system, and when the pressure in the liquid storage space 110 is abnormal and exceeds the safety range, the alarm can be automatically triggered and corresponding measures can be taken to avoid possible losses or accidents.

[0077] In this embodiment, the set pressure value can be adjusted accordingly according to the pressure bearing capacity of different boxes 100, the boiling point of the liquid, etc.

[0078] In this embodiment, the first trigger signal may be one of a high level signal and a low level signal output by the first comparison circuit, and the corresponding second trigger signal may be the other of the two.

[0079] According to one embodiment of the utility model, combined Fig.10 As shown, the open electric water heater further includes a heat exchanger 300 , which is disposed in the liquid storage space 110 . The heat exchanger 300 is suitable for exchanging heat between water flowing through the heat exchanger 300 and the liquid in the liquid storage space 110 .

[0080] In this embodiment, the heating component 20 heats the liquid in the liquid storage space 110, and the heated liquid exchanges heat with the low-temperature water in the heat exchanger 300. The low-temperature water absorbs heat and turns into high-temperature water, and then flows out of the heat exchanger 300 for user use. By setting the heat exchanger 300, the water in the heat exchanger 300 and the liquid in the liquid storage space 110 heated by the heating component 20 are not in direct contact, which avoids the heating component 20 from polluting the water used by the user, and also reduces the problem of dirt on the surface of the heating component 20 due to impurities in the water.

[0081] In this embodiment, the liquid in the liquid storage space 110 can be an external water source similar to that of the heat exchanger 300 , or can be a heat-conducting material such as oil or a phase change energy storage material.

[0082] According to one embodiment of the utility model, combined Fig.10 As shown, the box body 100 is also provided with a liquid replenishing port 141, a liquid inlet 143 and a liquid outlet 142. The water inlet end of the heat exchanger 300 is connected to the liquid inlet 143, the water outlet end of the heat exchanger 300 is connected to the liquid outlet 142, and the liquid replenishing port 141 is connected to the liquid storage space 110.

[0083] In this embodiment, after the liquid in the liquid storage space 110 is heated by the heating component 20, part of the liquid will be converted into steam, and will be discharged from the liquid storage space 110 from the exhaust port 120 when the actual pressure value above the liquid surface is greater than the set pressure value, thereby causing the liquid in the liquid storage space 110 to gradually decrease. By providing the liquid replenishing port 141, the liquid in the liquid storage space 110 is replenished after it is reduced to a certain volume, thereby ensuring that the liquid can always cover the heating component 20 and the heat exchanger 300, thereby improving the heating and heat exchange efficiency of the open electric water heater.

[0084] In one embodiment, the liquid replenishing port 141 is disposed at the bottom of the box body 100, that is, the replenishing liquid of the liquid replenishing port 141 is replenished from below the liquid in the liquid storage space 110, thereby reducing the impact on the original liquid in the liquid storage space 110 during the liquid replenishing process, causing the liquid level to oscillate, and resulting in the problem of liquid overflowing from the exhaust port 120.

[0085] In one embodiment, the open electric water heater also includes a first three-way valve 610, the liquid replenishment port 141 is connected to the first end of the first three-way valve 610, the second end of the first three-way valve 610 is connected to an external water source, and the third end of the first three-way valve 610 is connected to the drain valve 630.

[0086] In this embodiment, the liquid storage space 110 is connected to the outside by closing the third end of the first three-way valve 610 and opening the drain valve 630 to connect the first end and the second end, and the liquid is discharged from the liquid storage space 110 through the drain valve 630, and the impurities and dirt carried in the liquid are discharged along with the liquid, thereby achieving the cleaning of the liquid storage space 110; by closing the drain valve 630 and connecting the first end and the second end of the first three-way valve 610, liquid replenishment in the liquid storage space 110 is achieved.

[0087] In this embodiment, in order to avoid leakage of the first three-way valve 610 , a switch valve may be provided at the first end of the first three-way valve 610 to isolate the liquid storage space 110 from the outside.

[0088] In one embodiment, the heating component 20 is disposed in the housing 100, and the heating component 20 is suitable for directly contacting the liquid in the liquid storage space 110 to improve the heating effect of the heating component 20. The housing 100 can be provided with an insulation layer accordingly to improve the overall insulation effect of the liquid storage space 110 and reduce the use cost of the electric water heater.

[0089] Of course, the heating component 20 can also be arranged outside the liquid storage space 110. The heat of the heating component 20 is transferred to the liquid storage space 110 through the wall of the box 100, avoiding direct contact between the heating component 20 and the liquid in the liquid storage space 110, preventing the heating component 20 from contaminating the liquid, or preventing the liquid from forming dirt on the surface of the heating component 20.

[0090] In one embodiment, the heating assembly 20 is disposed at the bottom of the box 100. The high-temperature liquid near the heating assembly 20 has a low density and thus floats, while the low-temperature liquid above has a high density and sinks to the vicinity of the heating assembly 20, thereby enhancing the heat exchange of the liquid in the liquid storage space 110 and improving the temperature uniformity of the liquid in the liquid storage space 110.

[0091] Of course, a larger number of heating components 20 may be provided. When multiple heating components 20 are used for heating, some heating components 20 may be arranged on the side wall close to the bottom wall, and some heating components 20 may be arranged on the side wall close to the top wall, so as to improve the heating efficiency of the liquid in the liquid storage space 110.

[0092] According to one embodiment of the utility model, combined Fig.10As shown, when the heating component 20 is arranged in the box body 100, the liquid inlet 141 is arranged to avoid the heating component 20 in the orthographic projection along the vertical direction. It can be understood that when the box body 100 discharges waste through the liquid inlet 141 and the waste valve 630, the impurities in the liquid storage space 110 will gradually move toward the liquid inlet 141. The liquid inlet 141 arranged to avoid the heating component 20 reduces the possibility of the impurities adhering to the heating component 20 as much as possible when flowing out of the box body 100, while providing the waste discharge effect of the box body 100 and improving the service life of the heating component 20.

[0093] According to one embodiment of the utility model, the open-type electric water heater also includes a second three-way valve 620, which connects the second end of the first three-way valve 610, the liquid inlet 143 and the external water source; a water replenishment valve 640 is arranged on the pipeline connecting the first three-way valve 610 and the second three-way valve 620.

[0094] In this embodiment, the liquid in the liquid storage space 110 and the liquid in the heat exchanger 300 are both supplied by an external water source, and there is no need to set up an additional dedicated heat exchange liquid, thereby reducing the use cost of the electric water heater; and they are connected through a second three-way valve 620, which improves the integration of the electric water heater and reduces the volume occupied by the electric water heater.

[0095] By setting a water replenishment valve 640 to connect the first three-way valve 610 and the second three-way valve 620, when the box 100 needs to discharge sewage, the sewage valve 630 is opened and the water replenishment valve 640 is closed; when the box 100 heats the liquid normally, the sewage valve 630 is closed and the liquid in the liquid storage space 110 is replenished through the water replenishment valve 640.

[0096] In this embodiment, the water replenishment valve 640 can be opened and closed automatically based on the liquid level in the liquid storage space 110 (needs to be connected to a liquid level detector and a control component) or opened and closed manually by the user.

[0097] According to one embodiment of the utility model, combined Fig.10 As shown, the exhaust port 120 is provided on the side wall of the box body 100, and the outlet end of the valve 160 faces the bottom of the box body 100. It is understandable that the high-temperature steam in the liquid storage space 110 will condense into liquid after being discharged from the exhaust port 120 and contacting the low-temperature air outside. The exhaust port 120 is located on the side wall to prevent the liquid at the outlet end of the exhaust port 120 from accumulating on the surface of the box body 100 and corroding the external structure of the box body 100, and the outlet end faces the bottom of the box body 100, which reduces the liquid condensed at the outlet end from returning to the liquid storage space 110 to pollute the liquid.

[0098] In this embodiment, a cooling device may also be provided at the air outlet end of the exhaust port 120 to cool the high-temperature steam at the air outlet end to prevent the high-temperature steam or the liquid condensed from the high-temperature steam from scalding the user; further, a liquid collecting device may be connected after the cooling device to recover the liquid condensed from the high-temperature steam to prevent the liquid from remaining in the space where the box 100 is located for a long time, resulting in a humid environment and affecting the service life of the box 100.

[0099] According to one embodiment of the utility model, combined Fig.10 As shown, the box body 100 is a cube, and the box body 100 has a first side wall and a second side wall arranged opposite to each other. An exhaust port 120 is arranged on the first side wall near the top side of the box body 100, and a heating component 20 is arranged on the second side wall near the bottom side of the box body 100.

[0100] It is understandable that the bubbles generated on the heating component 20 will move toward the liquid surface under the action of buoyancy, and since the air pressure at the exhaust port 120 is lower, the bubbles tend to converge toward the exhaust port 120. By changing the relative position of the exhaust port 120 and the heating component 20 and moving the line connecting the exhaust port 120 and the heating component 20 closer to the diagonal of the casing 100, the distance that the bubbles move from the heating component 20 to the exhaust port 120 can be extended as much as possible, thereby delaying the bursting of the bubbles after floating to the liquid surface and reducing the noise of the electric water heater.

[0101] In addition, due to the effect of the liquid's own gravity, the pressure on the surface of the heating component 20 arranged at the bottom side of the box 100 is greater than that at other positions of the box 100, thereby increasing the boiling point of the liquid near the surface of the heating component 20, thereby delaying the timing of bubble generation, avoiding the noise caused by bubble bursting, and improving the user experience.

[0102] According to an embodiment of the present utility model, as shown in combination with 10, the open electric water heater further includes a liquid level detector 400, which is arranged on the tank 100 and is used to monitor the liquid level in the tank 100. The liquid level detector 400 can be in the form of real-time detection of the liquid level, or can be in the form of arranging the liquid level detector 400 at a specific height to send a trigger signal after the liquid level reaches the specific height, wherein the trigger signal can be used to trigger an alarm device to alarm the user, or to control the opening and closing of the water supply valve 640.

[0103] In one embodiment, the liquid level detector 400 may include a plurality of liquid level probes arranged in a gradient in the vertical direction. The liquid level probes are applicable to different types of liquids, meeting the requirement of the electric water heater to detect the liquid level while using different liquids to achieve heat exchange when using the heat exchanger 300.

[0104] In other embodiments, the liquid level detector 400 may also be in the form of a float switch. Specifically, a magnet is provided inside the float, and a Hall sensor is provided at a specific height of the box 100. The float floats on the liquid surface. When the liquid level reaches a specific height, the corresponding Hall sensor detects the magnet of the float and sends a trigger signal. Of course, other devices capable of detecting the liquid level height may also be used.

[0105] Finally, it should be noted that the above implementation modes are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. An open electric water heater, characterized in that: include: The box body is provided with a liquid storage space; A heating component is connected to the box body and is suitable for heating the liquid in the liquid storage space. The heating component includes a heating element and a heat dissipation element. The heat dissipation element is installed on the heating element and is suitable for increasing the heat dissipation area of ​​the heating component.

2. The open type electric water heater according to claim 1, characterized in that: The distance between the heating component and the inner wall of the box body is greater than or equal to 30 mm.

3. The open type electric water heater according to claim 1, characterized in that: The heating element comprises a heating tube, the heat sink is a heat sink, the heat sink is provided with a first sleeve, and the first sleeve is sleeved on the heating tube.

4. The open type electric water heater according to claim 3, characterized in that: The heat dissipation plate includes two heat dissipation sub-plates, each of which is provided with an arc-shaped portion, and the two arc-shaped portions are combined to form the first sleeve.

5. The open type electric water heater according to claim 3, characterized in that: The heating tube comprises at least two parallel straight segments, and the heat dissipation plate is provided with a first sleeve corresponding to the straight segments.

6. The open type electric water heater according to claim 1, characterized in that: The heat sink includes heat sink fins extending outward from the heating element.

7. The open type electric water heater according to claim 6, characterized in that: The heat dissipation fins are spiral fins, and the spiral fins extend in a spiral along an extension direction of the heating element.

8. The open type electric water heater according to claim 6, characterized in that: The heat dissipation fin further comprises a second sleeve, and the second sleeve is sleeved on the heating element.

9. The open type electric water heater according to claim 8, characterized in that: The heat dissipation fin includes a plurality of fin units, and the fin unit includes at least one sleeve portion and at least one fin portion. The first end of the fin portion is connected to the sleeve portion, and the second end extends away from the sleeve portion. The fin unit is sleeved on the heating element through the sleeve portion.

10. The open type electric water heater according to claim 9, characterized in that: The heating element is a heating tube, and the heating tube includes at least one straight section, and a plurality of the fin units are sleeved on the straight section.

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