Water-electricity separation heater with external heat source

Abstract

The utility model relates to the technical field of electric water heaters, in particular to a water-electricity separation heater with an external heat source. According to the technical scheme, the electric water heater comprises a shell composed of a heat preservation layer, a shell and at least one inner container and further comprises an electric heating film, and the electric heating film is arranged on the outer wall of the bottom of the inner container to achieve water and electricity separation type heating. The electric heating film is arranged on the outer wall of the bottom of the inner container to replace a traditional heating mode that an electric heating pipe is inserted into the inner container, water and electricity separation can be achieved, and potential safety hazards of water leakage and electricity leakage are reduced; the heating area of the electric heating film is far larger than the heating surface area of the heating pipe, so that the heat load per unit area is reduced, the temperature is lowered, and the generation probability of scale in the inner container can be reduced; the electric heating film performs coating type heating at the bottom of the inner container, heating is more uniform, heat in the inner container can be transferred more rapidly due to the fact that a heat source is arranged on the lower portion and the characteristic that hot water can rise upwards is combined, an electric heating pipe is not used any more, metal such as a magnesium rod does not need to be used any more, and energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electric water heaters, and in particular to a water-electricity separation heater with an external heat source. Background Art

[0002] An electric water heater is a water heater that uses electricity as energy for heating. It is one of the three major water heaters along with gas water heaters and solar water heaters.

[0003] Existing electric water heaters usually heat water by inserting electric heating tubes into the inner tank, which has many problems, such as: ①. The electric heating tube is in direct contact with water, which poses a safety hazard of water leakage and electric leakage; ②. The electric heating tube is in direct contact with water, and scale is easily formed on the surface, resulting in reduced thermal efficiency and shortened life of the electric heating tube; ③. In order to reduce the impact of scale, scale-inhibiting devices such as magnesium rods must be configured, and they must be replaced regularly, which increases the cost of use, wastes resources and is not conducive to environmental protection; ④. Since the electric heating tube, magnesium rod, temperature probe and other devices need to be placed in the inner tank, flange covers, flanges, flange interfaces, sealing gaskets and other components need to be added, which not only increases the welding seams of the inner tank, but also increases the brazing welding joints, which not only increases the processing steps and costs, but also increases the risk of water leakage and reduces the pressure resistance of the inner tank.

[0004] To this end, the present invention proposes a water-electricity separation heater with an external heat source to solve the above-mentioned problem caused by inserting an electric heating tube into an inner tank for heating. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the background technology and to provide a water-electricity separation heater with an external heat source.

[0006] The technical solution of the present invention is a water-electricity separation heater with an external heat source, comprising a shell consisting of an insulation layer, an outer shell, and at least one inner tank, and also comprising an electric heating film, wherein the electric heating film is arranged on the bottom outer wall of the inner tank to realize water-electricity separation heating.

[0007] Optionally, a water outlet pipe is included, and the water outlet pipe is inserted into the inner tank from below.

[0008] Optionally, a spoiler mechanism is included, and the spoiler mechanism is located in the inner tank and is used to increase spoiler to improve heat transfer efficiency.

[0009] Optionally, the spoiler mechanism can be rotatably attached to the outer wall of the water outlet pipe so as to enter and exit along the installation opening of the water outlet pipe.

[0010] Optionally, the spoiler mechanism includes a connecting block and a spoiler blade rotatably connected to the connecting block via a rotating shaft b.

[0011] Optionally, the spoiler mechanism includes a rotating connector, and the connecting block is rotatably connected to the water outlet pipe via the rotating connector.

[0012] Optionally, the rotating connecting member includes a first rotating arm fixed to the bottom end of the connecting block, a second rotating arm fixed to the outer wall of the water outlet pipe, and a rotating shaft a fixed to the first rotating arm and rotatably connected to the second rotating arm.

[0013] Optionally, the spoiler mechanism further includes a connecting rod rotating assembly for driving the connecting block to rotate outside the electric water heater housing.

[0014] Optionally, the connecting rod rotating assembly includes a connecting ring that is movably connected to the water outlet pipe and a connecting shaft with one end fixedly connected to the connecting ring and the other end connected to the first rotating arm through a connecting rod group. The connecting rod group includes a connecting rod ring that is fixedly connected to the outer wall of the first rotating arm and a connecting rod push shaft connected to the top end of the connecting shaft. The connecting rod push shaft is movably connected to the connecting rod ring.

[0015] Optionally, the connecting rod rotating assembly also includes a threaded ring that rotates coaxially with the connecting ring, the threaded ring is threadedly engaged with the outer wall of the water outlet pipe, and a positioning block is provided on the outer wall of the water outlet pipe above the connecting ring and below the threaded ring.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The present invention provides an electric heating film on the bottom outer wall of the inner pot to replace the traditional heating method of inserting an electric heating tube into the inner pot, which has multiple benefits:

[0018] First, it can separate water from electricity and reduce the potential safety hazards of water and electricity leakage;

[0019] Second, the heating area of ​​the electric heating film is much larger than the heating surface area of ​​the heating tube, so the heat load per unit area becomes smaller, the temperature becomes lower, and the probability of scale formation in the inner tank can be reduced;

[0020] Third, the electric heating film is wrapped around the bottom of the inner tank for heating, which not only makes the heating more uniform, but also because the heat source is at the bottom, combined with the characteristic that hot water will rise, the heat transfer in the inner tank can be faster;

[0021] Fourthly, since electric heating tubes are no longer used, there is no need to use metals such as magnesium rods, thus reducing resource consumption;

[0022] Fifth, since electric heating tubes are no longer used, there is no need to retain inspection ports, and the insulation layer can achieve full-surround insulation, reducing energy consumption;

[0023] Furthermore, by designing a spoiler mechanism in the inner tank, when the electric heating film heats the bottom of the inner tank, the spoiler blades can rotate in the inner tank due to convection between the upper and lower cold and hot water. The spoiler formed by the rotation will reversely increase the convection, thereby increasing the heat exchange between the cold and hot water in the inner tank. In addition, since the spoiler mechanism can change its state to be flat against the outer wall of the water outlet pipe, it can smoothly enter the inner tank even if the heater is not provided with an inspection port, and switch to the horizontal state after entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of a water-electricity separation heater with an external heat source;

[0025] Figure 2 for Figure 1 Schematic diagram of the separated structure after cutting open;

[0026] Figure 3 It is a schematic diagram of the connection between the spoiler mechanism and the water outlet pipe when the spoiler blade is placed horizontally;

[0027] Figure 4 It is a schematic diagram of the connection between the spoiler mechanism and the water outlet pipe when the spoiler blades are placed vertically;

[0028] Figure 5 for Figure 4 Schematic diagram of the structure of the middle spoiler mechanism;

[0029] Figure 6 for Figure 5 The main view of

[0030] Figure 7 It is a structural schematic diagram of an electric heating film applied to a horizontal double-tank electric water heater;

[0031] Figure 8 It is a structural schematic diagram of an electric heating film applied to a vertical single-tank electric water heater;

[0032] Fig. 9 This is a schematic diagram of a structure in which an electric heating film is applied to a vertical double-tank electric water heater;

[0033] Fig.10 This is another structural schematic diagram of an electric heating film applied to a vertical double-tank electric water heater.

[0034] Reference numerals: 1. liner;

[0035] 2. Insulation layer;

[0036] 3. Shell;

[0037] 4. Electric heating film;

[0038] 5. Water outlet pipe;

[0039] 6. Temperature probe;

[0040] 7. Water inlet pipe;

[0041] 8. spoiler mechanism; 81. connecting block; 82. spoiler blade; 821. rotating shaft b; 83. rotating connecting piece; 831. first rotating arm; 832. second rotating arm; 833. rotating shaft a; 84. connecting rod rotating assembly; 841. connecting ring; 842. threaded ring; 843. connecting shaft; 844. connecting rod group; 8441. connecting rod push shaft; 8442. connecting rod collar. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0045] like Figure 1-2 As shown, the heat source external water-electricity separation heater proposed by the present invention includes a shell consisting of an inner tank 1, a heat insulation layer 2, and an outer shell 3. A water outlet pipe 5, a temperature probe 6, and a water inlet pipe 7 are installed at the bottom of the inner tank 1. Since it is an existing structure, it will not be described here.

[0046] This embodiment includes two parts:

[0047] Part One: In this embodiment, the water-electricity separation heater includes an electric heating film 4, which is used to replace the traditional electric heating tube to achieve water-electricity separation heating. The electric heating film 4 is fixedly connected to the bottom outer wall of the inner tank 1, and its electric heating port can be directly connected to the control panel on the outer shell 3 or connected through wires. Since this type of connection belongs to the prior art, it will not be described here. The electric heating film 4 can heat the inner tank wall, and the metal inner tank wall quickly transfers heat to the water and around the inner tank. Since the temperature of the bottom part close to the heat source is the highest, the water at the bottom heats up the fastest. The water rises rapidly after being heated, and the cold water on the top sinks rapidly, forming convection, thereby driving the water in the entire inner tank to circulate, and the water in the inner tank can be evenly heated to the required temperature.

[0048] In this embodiment, by providing an electric heating film 4 on the bottom outer wall of the inner pot 1 to replace the traditional heating method of inserting an electric heating tube into the inner pot 1, there are many benefits, such as:

[0049] First, it can separate water from electricity and reduce the potential safety hazards of water and electricity leakage;

[0050] Second, the heating area of ​​the electric heating film 4 is much larger than the heating surface area of ​​the heating tube, so the heat load per unit area becomes smaller, the temperature becomes lower, and the probability of scale generation in the inner tank 1 can be reduced;

[0051] Thirdly, the electric heating film 4 is wrapped around the bottom of the inner pot 1 for heating, which not only makes the heating more uniform, but also makes the heat transfer in the inner pot 1 faster because the heat source is at the bottom and the hot water rises upward;

[0052] Fourthly, since electric heating tubes are no longer used, there is no need to use metals such as magnesium rods, thus reducing resource consumption;

[0053] Fifth, since the electric heating tube is no longer used, there is no need to retain the inspection port, and the thermal insulation layer 2 can achieve full surrounding thermal insulation, thereby reducing energy consumption.

[0054] Part 2: On the basis of the above-mentioned hot water rising to realize convective heat exchange with the cold water above, a spoiler mechanism 8 is added to improve the convective heat exchange effect, as follows:

[0055] like Figure 2-6 As shown, the spoiler mechanism 8 is installed on the water outlet pipe 5, and the spoiler mechanism 8 can be installed into the inner tank 1 during the process of installing the water outlet pipe 5 on the electric heater. The reason for this design is that in Example 1, due to the design of the electric heating film 4, the inner tank 1 no longer requires an inspection port, which makes it difficult to place the spoiler mechanism 8 into the inner tank 1 through the inspection port. In this embodiment, it can be smoothly installed in the inner tank 1 by installing it on the water outlet pipe 5.

[0056] Furthermore, the spoiler mechanism 8 includes a connecting block 81, a spoiler blade 82, a rotating connecting member 83 and a connecting rod rotating assembly 84;

[0057] The connecting rod rotating assembly 84 includes a connecting ring 841, a threaded ring 842, a connecting shaft 843 and a connecting rod assembly 844. The connecting ring 841 rotates coaxially with the threaded ring 842, and the threaded ring 842 is screwed with the outer wall of the bottom end of the water outlet pipe 5, and the vertical movement of the connecting ring 841 and the threaded ring 842 is achieved by screwing. In addition, a positioning block is provided on the outer wall of the water outlet pipe 5 above the connecting ring 841 and below the threaded ring 842 to position the vertical movement of the connecting ring 841 and the threaded ring 842; the bottom end of the connecting shaft 843 is fixedly connected to the upper surface of the connecting ring 841, and the top end of the connecting shaft 843 is connected to a connecting rod push shaft 8441, which is movably sleeved with the connecting rod collar 8442, and the connecting rod collar 8442 is fixedly connected to the first rotating arm 831 described below. That is, when the threaded ring 842 is rotated, the threaded ring 842 drives the connecting ring 841 to move vertically through the threaded engagement with the water outlet pipe 5, thereby pushing the connecting shaft 843 to move vertically, and the connecting shaft 843 drives the first rotating arm 831 to rotate through the movable connection between the connecting rod push shaft 8441 and the connecting rod sleeve 8442;

[0058] The rotating connecting member 83 includes a first rotating arm 831 fixed to the bottom end of the connecting block 81, a second rotating arm 832 fixed to the outer wall of the water outlet pipe 5, and a rotating shaft a833 fixed to the first rotating arm 831 and rotatably connected to the second rotating arm 832;

[0059] The bottom end of the spoiler blade 82 is rotatably connected to the connecting block 81 via the rotating shaft b821. Figure 3 and Figure 4 These are two states after the spoiler blade 82 is rotated by the rotating shaft b821. Figure 4 In the embodiment, the spoiler blades 82 are flush with the outer wall of the water outlet pipe 5 , so the entire spoiler mechanism 8 can be inserted into the inner tank 1 together with the water outlet pipe 5 . Figure 3 In the embodiment, the spoiler blade 82 is horizontally placed and can rotate freely through the rotating shaft b821. Therefore, when the electric heating film 4 below heats the water in the inner tank 1, the convection generated by the upwelling of the hot water below and the sinking of the cold water above can force the spoiler blade 82 to rotate, thereby achieving the function of spoiling the flow and improving the convection effect.

[0060] It should be noted that the shape of the spoiler blade 82 in this embodiment is only an illustration. In other embodiments, other designs may be made to better achieve spoiler through rotation, which are not listed here one by one.

[0061] The working principle of this embodiment is: when the water outlet pipe 5 is installed, the flow disturbance mechanism 8 is kept Figure 4In the state shown, the water outlet pipe 5 is installed into the inner tank 1 together. Since the installation of the water outlet pipe 5 and the fixing and sealing after installation are all prior art, they are not described here. When the spoiler mechanism 8 is installed in the inner tank 1, the threaded ring 842 is rotated on the outside. The threaded ring 842 drives the connecting ring 841 to move upward through the threaded engagement with the water outlet pipe 5, and then drives the connecting shaft 843 to move upward. The connecting shaft 843 drives the connecting rod group 844 to move upward, and the movable connection between the connecting rod push shaft 8441 and the connecting rod sleeve ring 8442 causes the first rotating arm 831 to rotate, that is, the connecting block 81 and the spoiler blade 82 are rotated to Figure 3 When the electric heating film 4 is heated from below, the water at the bottom of the inner tank 1 is heated first, the hot water rises, and the cold water above falls. The convection formed will drive the spoiler blade 82 to rotate along the rotating shaft b821. The spoiler effect formed by the rotation will reversely increase the convection, that is, increase the heat exchange between the cold and hot water in the inner tank 1. Embodiment 2

[0062] Since the existing electric water heaters are divided into horizontal (single and double tanks) and vertical (single and double tanks), the first embodiment shows the connection of the electric heating film 4 on the inner tank of a horizontal single tank electric water heater, while this embodiment shows the connection of the electric heating film 4 on a horizontal double tank electric water heater. Figure 7 The water heater has two horizontal inner tanks 1, which are connected to each other. The electric heating film 4 is installed near the bottom of the lower single inner tank 1 to cover the water in the inner tank 1 from the outside. The hot water rises and forms convection with the cold water sinking in the upper inner tank 1, which can also achieve the same effect as the first embodiment. Embodiment 3

[0063] This embodiment provides a connection structure of the electric heating film 4 on a vertical single-tank electric water heater. Figure 8 The electric heating film 4 is coated and connected to the inner tank 1 near the bottom to achieve the technical effect of the above embodiment. In this embodiment, the water outlet pipe 5 is arranged at the top of the inner tank 1, and the temperature probe 6 and the water inlet pipe 7 are integrated and installed at the bottom of the inner tank 1 through a flange structure. The flange mouth does not need to be welded with any parts, and there are no welds or welding points, which eliminates the possibility of leakage due to corrosion of the welds or welding points. Embodiment 4

[0064] This embodiment provides a connection structure of the electric heating film 4 on a vertical double-tank electric water heater. Figure 9-10 The water heater has two vertical inner tanks 1 on the left and right, the two inner tanks 1 are connected to each other, and the electric heating film 4 is installed near the bottom of the two inner tanks 1 to achieve the technical effect of the above embodiment. In this embodiment, the installation of the water outlet pipe 5, the temperature probe 6, and the water inlet pipe 7 is different. Fig. 9The water outlet pipe 5 is installed at the bottom end of the left inner tank 1, and the temperature probe 6 and the water inlet pipe 7 are integrated and installed at the bottom end of the right inner tank 1 through the flange structure. Fig.10 In addition to the water outlet pipe 5, a temperature probe 6 is also integrated and installed at the bottom of the left inner tank 1. Therefore, since both the left and right inner tanks 1 have the temperature probe 6, temperature detection can be performed separately to reduce safety risks.

[0065] In addition, since the spoiler mechanism 8 is directly installed on the water outlet pipe 5 and there is no need to consider the problem of disassembly and maintenance after it is installed inside the inner tank 1, the spoiler mechanism 8 can be applied to all the above-mentioned embodiments, and the application method is the same as that of embodiment 1, which will not be repeated here.

[0066] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A heat source external water-electricity separation heater, comprising a shell consisting of a heat insulation layer (2), an outer shell (3), and at least one inner tank (1), characterized in that: It also includes: an electric heating film (4), wherein the electric heating film (4) is arranged on the bottom outer wall of the inner container (1) to achieve water-electricity separation heating; A water outlet pipe (5), the water outlet pipe (5) being inserted into the inner container (1) from below; A spoiler mechanism (8) is located in the inner tank (1) and is used to increase spoiler flow to improve heat transfer efficiency. The spoiler mechanism (8) can be rotatably attached to the outer wall of the water outlet pipe (5) so as to enter and exit along the installation opening of the water outlet pipe (5).

2. The heat source external water-electricity separation heater according to claim 1, characterized in that: The spoiler mechanism (8) comprises a connecting block (81) and a spoiler blade (82) rotatably connected to the connecting block (81) via a rotating shaft b (821).

3. The heat source external water-electricity separation heater according to claim 2, characterized in that: The flow-disturbing mechanism (8) comprises a rotating connection member (83), and the connecting block (81) is rotatably connected to the water outlet pipe (5) via the rotating connection member (83).

4. The heat source external water-electricity separation heater according to claim 3, characterized in that: The rotating connecting member (83) comprises a first rotating arm (831) fixed to the bottom end of the connecting block (81), a second rotating arm (832) fixed to the outer wall of the water outlet pipe (5), and a rotating shaft a (833) fixed to the first rotating arm (831) and rotatably connected to the second rotating arm (832).

5. The heat source external water-electricity separation heater according to claim 4, characterized in that: The flow disturbance mechanism (8) also includes a connecting rod rotating assembly (84) for pushing the connecting block (81) to rotate outside the electric water heater housing.

6. The heat source external water-electricity separation heater according to claim 5, characterized in that: The connecting rod rotating assembly (84) comprises a connecting ring (841) movably sleeved with the water outlet pipe (5) and a connecting shaft (843) having one end fixedly connected to the connecting ring (841) and the other end connected to the first rotating arm (831) through a connecting rod assembly (844); the connecting rod assembly (844) comprises a connecting rod collar (8442) fixedly connected to the outer wall of the first rotating arm (831) and a connecting rod push shaft (8441) connected to the top end of the connecting shaft (843); the connecting rod push shaft (8441) is movably sleeved with the connecting rod collar (8442).

7. The heat source external water-electricity separation heater according to claim 6, characterized in that: The connecting rod rotating assembly (84) further comprises a threaded ring (842) coaxially rotating with the connecting ring (841), the threaded ring (842) being threadedly engaged with the outer wall of the water outlet pipe (5), and a positioning block is provided on the outer wall of the water outlet pipe (5) above the connecting ring (841) and below the threaded ring (842).

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