A heating device for electric water heater, electric water heater and heating method

Abstract

The application discloses a heating device for an electric water heater, the electric water heater and a heating method. The heating device is provided with a vortex generator assembly for stirring and mixing water in the inner cavity of the inner container on the inner container or the connecting seat, can accelerate the circulation flow efficiency of the water in the inner container, makes the cold water and the hot water more uniformly mixed, and then makes the water temperature of the cold water and the hot water in the inner container gradually consistent, reduces the water temperature difference in the inner container, improves the heat exchange rate, saves electricity and the overall space. In addition, the rotor and the stator are located on the inner and outer sides of the inner container or the connecting seat in the application, so that the rotor and the stator are relatively separated, that is, the stator is relatively separated from the water in the inner cavity of the inner container. The safety use of the stator is ensured while the sealing property of the inner container is ensured, water and electricity are separated, and the application has the characteristics of safety and reliability and reasonable design.

Description

[0001] The present application relates to the technical field of electric water heaters, in particular to a heating device for an electric water heater, an electric water heater and a heating method.

[0002] The electric water heater is a commonly used household appliance, which uses electric heating water for household use. The basic structure is simple, and is usually composed of an inner container, a heating pipe, an inlet and outlet, a drain and a temperature control.

[0003] At present, during the use of the electric water heater, due to the influence of the traditional electric water heater and the design structure of the physical phenomenon itself, three layers of different temperatures (three warm layers) often appear, among which the upper layer of the inner container is the hottest, the middle layer is the medium temperature, and the bottom layer is the temperature of the incoming water (normal temperature). During use, the hottest water in the upper layer of the inner container is discharged (only 1 / 3 of the total volume of the inner container), and then the water temperature at the outlet drops sharply, resulting in the phenomenon of hot and cold water. In addition, the water temperature at the outlet becomes low temperature water, making it difficult to complete bathing.

[0004] At present, in order to solve the above-mentioned inherent problems of the electric water heater, a vortex generator is usually provided outside the inner container of the electric water heater, and the rotating shaft of the vortex generator penetrates the side wall of the inner container and extends into the inner container, and is connected with the stirring impeller in motion. When the electric water heater is heated and kept warm or used, the stirring impeller rotates to generate a vortex in the water in the inner container. In the above process, the water at the center of the vortex generates a pressure difference (the pressure at the center of the vortex is low, and the pressure around the stirring impeller is high, forming a pressure difference), thereby accelerating the circulation efficiency of the heated water in the inner container, rapidly mixing the cold water and the hot water to achieve uniformity, and making the temperature difference between the cold water and the hot water close to zero, thereby increasing the overall thermal efficiency.

[0005] However, the rotating shaft of the vortex generator in the above-mentioned electric water heater structure needs to penetrate the side wall of the inner container, which is easy to cause the water in the inner container to leak from the rotating shaft hole, affecting the normal use of the vortex generator, and also has the problem of electric leakage and poor safety.

[0006] Therefore, the present application is proposed in view of the above-mentioned problems.

[0007] ​​​The electric water heater heating device has the advantages that the water in the inner container is mixed more uniformly, the water temperature in the inner container gradually becomes consistent, the water temperature difference in the inner container is reduced, the heat exchange rate is improved, electricity is saved, the overall space is saved, the surface of the components in the inner container is not easy to stick to the decomposed substances in the water, the cleanliness of the inner container is improved, the user can use cleaner water, the rotor and the stator are located on the inner and outer sides of the inner container or the connecting seat to relatively separate the rotor and the stator, the stator is relatively separated from the water in the inner cavity of the inner container, the safety use of the stator is ensured while the sealing property of the inner container is ensured, water and electricity are separated, and the electric water heater heating device is safe, reliable and reasonable in design.

[0008] The electric water heater has the advantages that the heat exchange rate is high, electricity is saved, the volume space is saved (the volume of the inner container can be reduced due to the water multiplication), and the electric water heater is safe and reliable.

[0009] The electric water heater heating method has the advantages that the heat exchange rate is high, electricity is saved, the volume space is saved (the volume of the inner container can be reduced due to the water multiplication), and the electric water heater is safe and reliable.

[0010] The electric water heater heating device has the advantages that the water in the inner container is mixed more uniformly, the water temperature in the inner container gradually becomes consistent, the water temperature difference in the inner container is reduced, the heat exchange rate is improved, electricity is saved, the overall space is saved, the surface of the components in the inner container is not easy to stick to the decomposed substances in the water, the cleanliness of the inner container is improved, the user can use cleaner water, the rotor and the stator are located on the inner and outer sides of the inner container or the connecting seat to relatively separate the rotor and the stator, the stator is relatively separated from the water in the inner cavity of the inner container, the safety use of the stator is ensured while the sealing property of the inner container is ensured, water and electricity are separated, and the electric water heater heating device is safe, reliable and reasonable in design.

[0011] The electric water heater heating device has the advantages that the water in the inner container is mixed more uniformly, the water temperature in the inner container gradually becomes consistent, the water temperature difference in the inner container is reduced, the heat exchange rate is improved, electricity is saved, the overall space is saved, the surface of the components in the inner container is not easy to stick to the decomposed substances in the water, the cleanliness of the inner container is improved, the user can use cleaner water, the rotor and the stator are located on the inner and outer sides of the inner container or the connecting seat to relatively separate the rotor and the stator, the stator is relatively separated from the water in the inner cavity of the inner container, the safety use of the stator is ensured while the sealing property of the inner container is ensured, water and electricity are separated, and the electric water heater heating device is safe, reliable and reasonable in design.

[0012] A heating device for electric water heater, the inner container 1 is provided with a rotor accommodating cavity 63 for accommodating a rotor 61, the rotor accommodating cavity 63 is open towards the inner cavity of the inner container 1, and the rotor accommodating cavity 63 is outwardly protruded to form a connecting shaft 64 for fixedly connecting with a stator 62, the rotor 61 and the stator 62 are respectively located on the inner and outer sides of the inner container 1 to be relatively spaced apart; or the connecting seat 2 is provided with a rotor accommodating cavity 63 for accommodating a rotor 61, the rotor accommodating cavity 63 is open towards the inner cavity of the inner container 1, and the rotor accommodating cavity 63 is outwardly protruded to form a connecting shaft 64 for fixedly connecting with a stator 62, the rotor 61 and the stator 62 are respectively located on the inner and outer sides of the connecting seat 2 to be relatively spaced apart.

[0013] A heating device for electric water heater, the rotor accommodating cavity 63 is coaxially provided with a positioning shaft 631 which is fixedly connected with the rotor accommodating cavity 63.

[0014] A heating device for electric water heater, the bottom of the rotor accommodating cavity 63 is provided with a positioning hole 632 for inserting one end of the positioning shaft 631 to fixedly connect the positioning shaft 631 with the rotor accommodating cavity 63.

[0015] A heating device for electric water heater, when the rotor accommodating cavity 63 is provided on the inner container 1, the rotor accommodating cavity 63 is integrally formed with the inner container 1; when the rotor accommodating cavity 63 is provided on the connecting seat 2, the rotor accommodating cavity 63 is integrally formed with the connecting seat 2.

[0016] A heating device for electric water heater, the rotor 61 comprises a rotor body made of permanent magnetic material which is rotatably arranged in the rotor accommodating cavity 63, and the impeller 65 is connected with the rotor body.

[0017] A heating device for electric water heater, the impeller 65 comprises a rotating seat 651 and blades 652 arranged on the rotating seat 651, and the rotating seat 651 is integrally injection molded on the rotor body.

[0018] A heating device for electric water heater, the rotating seat 651 is provided with a connecting through hole 6511 for penetrating the positioning shaft 631.

[0019] A heating device for electric water heater, the cold water pipe 5 is provided with an inductive detection sensor 7 on the inner end port side for detecting water temperature.

[0020] A heating device for electric water heater, the stator 62 comprises a stator body 621 which is fixedly connected with the connecting shaft 64, and a coil winding 622 arranged on the stator body 621.

[0021] The heating device for electric water heater as described above, the inner end port of the hot water pipe 4 extends to the closed end of the inner container 1 and is arranged to be inclined to the inner side wall of the inner container 1 relative to the central axis of the inner container 1.

[0022] The heating device for electric water heater as described above, the inner container 1 is further provided with a sleeve 8 covering the heating pipe 3 and the hot water pipe 4, and the inner cavity of the sleeve 8 is communicated with the inner cavity of the inner container 1.

[0023] The heating device for electric water heater as described above, the sleeve 8 comprises a main shell 81 arranged in U-shaped cross section, the main shell 81 is provided with a baffle 82 for closing one end opening of the main shell 81, and the inner end port of the hot water pipe 4 extends to one side of the baffle 82 and is arranged to be inclined to the inner side wall of the main shell 81; or the sleeve 8 comprises a main shell 81 arranged in hollow and open at both ends, the main shell 81 is provided with a baffle 82 for closing one end opening of the main shell 81, and the lower side wall of the main shell 81 is provided with a water inlet and outlet hole 811, and the inner end port of the hot water pipe 4 extends to one side of the baffle 82 and is arranged to be inclined to the upper side wall of the main shell 81.

[0024] The heating device for electric water heater as described above, when the rotor 61 drives the impeller 65 to rotate, the water pressure of the circumferential region of the impeller 65 is greater than the water pressure of the axial center of the impeller 65, so that the water of the circumferential region of the impeller 65 flows along the inner side wall of the inner container 1 to the end away from the impeller 65, and the water of the axial center of the impeller 65 flows to the circumferential side of the impeller 65 to circulate.

[0025] The heating device for electric water heater as described above, the inner container 1 is a horizontal inner container or a vertical inner container.

[0026] The application further provides an electric water heater, comprising an electric water heater body, and the electric water heater body is provided with the heating device for electric water heater as described above.

[0027] The application further provides a heating method of an electric water heater, using a heating device for electric water heater, the heating device comprising an inner container 1 with an open end, the open end of the inner container 1 is provided with a connecting seat 2, the connecting seat 2 is provided with a heating pipe 3, a hot water pipe 4 and a cold water pipe 5, the heating pipe 3 extends into the inner cavity of the inner container 1, and the inner end port of the cold water pipe 5 is communicated with the inner cavity of the inner container 1.

[0028] The inner container 1 is further provided with a sleeve 8 covering the heating pipe 3 and the hot water pipe 4, and the lower side wall of the sleeve 8 is provided with a water inlet and outlet hole 811, and the hot water pipe 4 is arranged to be inclined and the inner end port extends close to the inner upper side wall of the sleeve 8.

[0029] The inner container 1 or the connecting base 2 is provided with a vortex generator assembly 6, which comprises a rotor 61 and a stator 62.

[0030] The heating method comprises the following steps:

[0031] S1, heating, the heating pipe 3 is powered on to heat the water in the sleeve 8;

[0032] S2, the heated hot water in the sleeve 8 rises to the upper side wall of the sleeve 8, when the hot water is used, the heated hot water in the sleeve 8 flows out from the hot water pipe 4 inlet port, and the cold water pipe 5 enters the cold water;

[0033] S3, when the hot water is stopped to be used, and the water temperature in the inner container 1 is lower than the preset temperature, the hot water in the sleeve 8 flows out from the sleeve 8 lower side wall water inlet and outlet hole 811, the vortex generator assembly 6 works to drive the rotor 61 to rotate, at this moment, the water pressure of the circumferential area of the impeller 65 is greater than that of the axial center of the impeller 65, so that the water of the circumferential area of the impeller 65 flows away from the one end of the inner container 1, and the water of the axial center of the impeller 65 flows to the circumferential side of the impeller 65 to circulate, so that the cold water and the hot water in the inner container 1 are mixed;

[0034] S4, when the water in the inner container 1 is heated to the preset temperature, the heating pipe 3 stops working and enters the standby state.

[0035] Compared with the prior art, the present application has the following advantages:

[0036] 1, the present application is provided with a vortex generator assembly for stirring and mixing the water in the inner cavity of the inner container on the inner container or the connecting base, which can accelerate the circulation flow efficiency of the water in the inner container, make the cold water and the hot water mixed more uniformly, and then make the water temperature of the cold water and the hot water in the inner container gradually consistent, reduce the water temperature difference in the inner container, improve the heat exchange rate, save electricity; in addition, during the stirring process of the vortex generator assembly, the water in the inner container can wash and clean the surfaces of the heating pipe, the cold water pipe and the hot water pipe, so that the surface of the components in the inner container is not easy to stick to the decomposed substances in the water, improve the cleanliness of the inner container, so that the user can use cleaner water; in addition, the rotor and the stator are respectively located on the inner and outer sides of the inner container or the connecting base to relatively separate the rotor and the stator, that is, to relatively separate the stator and the water in the inner cavity of the inner container, which can ensure the safety use of the stator while ensuring the sealing of the inner container, realize the water and electricity separation, and has the characteristics of safety, reliability and reasonable design.

[0037] 2. The rotor accommodating cavity is coaxially provided with a positioning shaft in relative fixation, the rotor is rotatably connected with the positioning shaft, the rotor is stably and firmly placed in the rotor accommodating cavity while rotating smoothly, the structural strength is improved, the connecting through hole is arranged on the rotor for the positioning shaft to pass through and position, the guiding and positioning effects are achieved, and the assembly is facilitated.

[0038] 3. When the rotor accommodating cavity is arranged on the inner container, the rotor accommodating cavity is integrally formed with the inner container; when the rotor accommodating cavity is arranged on the connecting base, the rotor accommodating cavity is integrally formed with the connecting base, the sealing property is improved, the water in the inner container is further ensured to be separated from the stator, the assembly steps are reduced, and the manufacturing cost is reduced.

[0039] 4. The sleeve shell covering the heating pipe and the hot water pipe is further arranged in the inner container, the inner cavity of the sleeve shell is communicated with the inner cavity of the inner container, when the hot water is needed, the water in the sleeve shell is heated by the heating pipe, and the water in the whole inner container is not needed to be heated, and the instant heating function is realized.

DRAWINGS

[0040] The specific embodiments of the present application will be further described in detail below with reference to the drawings, in which:

[0041] Figure 1 It is a structure schematic view of the embodiment 1 in the present application when being placed horizontally.

[0042] Figure 2 It is a sectional view of the embodiment 1 in the present application.

[0043] Figure 3 It is a sectional view of the vortex generator assembly of the embodiment 1 in the present application.

[0044] Figure 4 It is a partial structure schematic of the embodiment 1 in the present application.

[0045] Figure 5 It is a structure schematic view of the sleeve shell of the embodiment 1 in the present application.

[0046] Figure 6 It is a structure schematic view of the impeller of the embodiment 1 in the present application.

[0047] Figure 7 It is a sectional view of the embodiment 2 in the present application.

[0048] Figure 8 It is a structure schematic view of the sleeve shell of the embodiment 2 in the present application.

CONCRETE EMBODIMENT

[0049] The specific embodiments of the present application will be further described in detail below with reference to the drawings, in which: Figures 1-8 The specific embodiments of the present application will be further described in detail below with reference to the drawings, in which:

[0050] Example 1:

[0051] like Figures 1-6 As shown, the present invention discloses a heating device for an electric water heater, comprising an inner tank 1 with an open end, a connecting seat 2 provided at the open end of the inner tank 1, a heating pipe 3, a hot water pipe 4, and a cold water pipe 5 provided on the connecting seat 2, the heating pipe 3 extending into the inner cavity of the inner tank 1, and the inner ports of the hot water pipe 4 and the cold water pipe 5 communicating with the inner cavity of the inner tank 1; a vortex generator assembly 6 is provided on the inner tank 1 or the connecting seat 2, the vortex generator assembly 6 comprising a rotor 61 and a stator 62, the rotor 61 being movably connected to an impeller 65, and the rotor 61 and the stator 62 being located on the inner and outer sides of the inner tank 1 respectively and separated from each other. This invention utilizes a vortex generator assembly on the inner liner or connecting seat to agitate and mix the water within the inner liner. This accelerates the circulation of water within the inner liner, resulting in more uniform mixing of cold and hot water. Consequently, the temperatures of the cold and hot water gradually converge, reducing the temperature difference within the inner liner, increasing the heat exchange rate, and saving electricity. Furthermore, during the agitation process, the water in the inner liner washes and cleans the surfaces of the heating pipes, cold water pipes, and hot water pipes, preventing the adhesion of water-decomposed substances to the surfaces of components within the inner liner, thus improving the cleanliness of the inner liner and allowing users to use cleaner water. Additionally, the rotor and stator are positioned on the inner and outer sides of the inner liner or connecting seat, respectively, to separate them (the rotor is located on the inner side of the inner liner, and the stator on the outer side). This isolates the stator from the water within the inner liner, ensuring both the inner liner's airtightness and the safe operation of the stator. This achieves water-electricity separation and is characterized by safety, reliability, and a rational design.

[0052] like Figures 1-6 As shown, in order to better install the rotor and stator, the connecting seat 2 is provided with a rotor receiving cavity 63 for accommodating the rotor 61. The opening of the rotor receiving cavity 63 faces the inner cavity of the inner liner 1, and the rotor receiving cavity 63 protrudes outward to form a connecting shaft 64 for fixed connection with the stator 62. The rotor 61 and the stator 62 are located on the inner and outer sides of the connecting seat 2 respectively so that the rotor 61 and the stator 62 are relatively separated.

[0053] To provide an alternative installation method, the inner liner 1 is provided with a rotor receiving cavity 63 for accommodating the rotor 61. The opening of the rotor receiving cavity 63 faces the inner cavity of the inner liner 1, and the rotor receiving cavity 63 protrudes outward to form a connecting shaft 64 for fixed connection with the stator 62. The rotor 61 and the stator 62 are located on the inner and outer sides of the inner liner 1 respectively so that the rotor 61 and the stator 62 are relatively separated.

[0054] like Figure 3As shown, the rotor accommodating cavity 63 is coaxially provided with a positioning shaft 631 fixedly relative, and the rotor 61 is rotatably connected with the positioning shaft 631, so that the rotor is smoothly rotated, and is stably and firmly placed in the rotor accommodating cavity, and the structural strength is improved.

[0055] As shown in Figure 3 , in order to facilitate disassembly and assembly, the bottom of the rotor accommodating cavity 63 is provided with a positioning hole 632 for inserting one end of the positioning shaft 631 to fixedly connect the positioning shaft 631 with the rotor accommodating cavity 63.

[0056] As shown in Figure 3 , when the rotor accommodating cavity 63 is arranged on the connecting seat 2, the rotor accommodating cavity 63 is integrally formed with the connecting seat 2, so that the sealing property is improved, the water in the inner container is further ensured to be separated from the stator, the assembly steps are reduced, and the manufacturing cost is lowered.

[0057] In another installation mode, when the rotor accommodating cavity 63 is arranged on the inner container 1, the rotor accommodating cavity 63 is integrally formed with the inner container 1.

[0058] As shown in Figure 3 , the rotor 61 comprises a rotor body made of permanent magnetic material and rotatably arranged in the rotor accommodating cavity 63, and the impeller 65 is connected with the rotor body.

[0059] As shown in Figure 3 , 4 , 6, the impeller 65 comprises a rotating seat 651 and blades 652 arranged on the rotating seat 651, and the rotating seat 651 is integrally injection molded on the rotor body, so that the impeller is more firmly and reliably connected with the rotor body, the assembly steps are reduced, and the manufacturing cost is lowered.

[0060] As shown in Figure 3 , 4 , 6, the rotating seat 651 is provided with a connecting through hole 6511 for penetrating the positioning shaft 631, so as to play a guiding and positioning role and facilitate assembly.

[0061] In order to facilitate use, the cold water pipe 5 is provided with an inductive detection sensor 7 for detecting water temperature on the inner end port side. As shown in Figure 4 , in this embodiment, the inductive detection sensor 7 is arranged on the connecting seat 2.

[0062] As shown in Figure 3 , the stator 62 comprises a stator body 621 fixedly connected with the connecting shaft 64 and a coil winding 622 arranged on the stator body 621.

[0063] As shown in Figure 2As shown, the inner end port of the hot water pipe 4 extends to the closed end of the inner container 1 and is arranged obliquely to the inner side wall of the inner container 1 relative to the central axis of the inner container 1. Since the density of hot water decreases after being heated and the hot water slowly rises to the upper side wall in the inner container, the embodiment extends the inner end port of the hot water pipe 4 to the upper side wall in the inner container 1, which facilitates the outflow of hot water from the inner end port of the hot water pipe.

[0064] As shown in Figure 2 , 5 , the inner container 1 further comprises a sleeve 8 covering the heating pipe 3 and the hot water pipe 4, and the inner cavity of the sleeve 8 is in communication with the inner cavity of the inner container 1. When a small amount of hot water is needed, the heating pipe only needs to heat the water in the sleeve, without the need to heat the water in the entire inner container, thereby achieving the instant heating function.

[0065] As shown in Figure 2 , 5 , the sleeve 8 comprises a hollow main shell 81 with two open ends, the main shell 81 is provided with a baffle 82 for blocking one of the open ends of the main shell 81, and the lower side wall of the main shell 81 is provided with a water inlet and outlet hole 811, and the inner end port of the hot water pipe 4 extends to the side of the baffle 82 and is arranged obliquely to the upper side wall of the main shell 81.

[0066] As shown in Figure 2 , in order to further accelerate the circulation of water in the inner container, make the mixing of cold water and hot water more uniform, and then make the water temperature of cold water and hot water in the inner container gradually consistent, reduce the water temperature difference in the inner container, improve the heat exchange rate, save electricity, when the rotor 61 drives the impeller 65 to rotate, the water pressure in the circumferential region of the impeller 65 is greater than the water pressure in the axial center of the impeller 65, thereby making the water in the circumferential region of the impeller 65 flow along the inner side wall of the inner container 1 away from one end of the impeller 65, and the water in the axial center of the impeller 65 flows to the circumferential side of the impeller 65 to circulate.

[0067] As shown in Figure 1 , the inner container 1 is a horizontal inner container. In other embodiments, the inner container 1 is a vertical inner container.

[0068] Example 2:

[0069] The difference between Example 2 and Example 1 is that, as shown in Figure 7 , 8 , the sleeve 8 comprises a main shell 81 arranged in a U-shaped cross section, the main shell 81 is provided with a baffle 82 for blocking one of the open ends of the main shell 81, and the inner end port of the hot water pipe 4 extends to the side of the baffle 82 and is arranged obliquely to the inner side wall of the main shell 81.

[0070] The present invention discloses an electric water heater, comprising an electric water heater body, wherein a heating device for an electric water heater as described above is provided inside the electric water heater body, which has the characteristics of safety, reliability and energy saving.

[0071] The present invention discloses a heating method for an electric water heater, which uses a heating device for an electric water heater. The heating device includes an inner tank 1 with an open end. The open end of the inner tank 1 is provided with a connecting seat 2. The connecting seat 2 is provided with a heating pipe 3, a hot water pipe 4 and a cold water pipe 5. The heating pipe 3 extends into the inner cavity of the inner tank 1, and the inner port of the cold water pipe 5 communicates with the inner cavity of the inner tank 1.

[0072] The inner tank 1 is also provided with a shell 8 that covers the heating tube 3 and the hot water tube 4 at the same time. The lower side wall of the shell 8 is provided with water inlet and outlet holes 811. The hot water tube 4 is inclined and its inner end extends close to the upper side wall of the inner shell 8.

[0073] The inner liner 1 or the connecting seat 2 is provided with a vortex generator assembly 6, which includes a rotor 61 and a stator 62. The rotor 61 is movably connected to an impeller 65. The rotor 61 and the stator 62 are located on the inner and outer sides of the inner liner 1 respectively and are relatively separated.

[0074] The heating method includes the following steps:

[0075] S1. Heating: The heating tube 3 is energized to heat the water inside the casing 8;

[0076] S2. The heated hot water inside the casing 8 rises to the upper inner wall of the casing 8. When hot water is used, the heated hot water inside the casing 8 flows out from the inner port of the hot water pipe 4, while cold water enters through the cold water pipe 5.

[0077] S3. When hot water is stopped and the water temperature in the inner tank 1 is lower than the preset temperature, the hot water in the outer shell 8 flows out of the outer shell 8 through the water inlet and outlet holes 811 on the lower side wall of the outer shell 8. The vortex generator assembly 6 works to make the rotor 61 drive the impeller 65 to rotate. At this time, the water pressure in the circumferential area of ​​the impeller 65 is greater than the water pressure in the axial center of the impeller 65, which causes the water in the circumferential area of ​​the impeller 65 to flow along the inner side wall of the inner tank 1 away from the impeller 65. At the same time, the water in the axial center of the impeller 65 flows to the circumference of the impeller 65 and circulates, so that the cold water and hot water in the inner tank 1 are stirred and mixed.

[0078] S4. Once the water in the inner tank 1 has been heated to the preset temperature, the heating element 3 stops working and enters standby mode. Therefore, electric water heaters using this heating method feature high heat exchange rate, energy saving, space saving (due to the increased availability of hot water, the volume of the inner tank can be reduced), and safety and reliability.

Claims

1. A heating device for an electric water heater, characterized by The utility model provides a kind of water heater, including inner bag (1) with open end, the open end of the inner bag (1) is equipped with connecting seat (2), heating pipe (3), hot water pipe (4) and cold water pipe (5) are equipped on the connecting seat (2), the heating pipe (3) extends into inner cavity of inner bag (1), and the inner end port of hot water pipe (4) and the inner end port of cold water pipe (5) are all communicated with the inner cavity of inner bag (1);Vortex generator assembly (6) is equipped on the connecting seat (2), and the vortex generator assembly (6) includes rotor (61), stator (62), the rotor (61) is connected with impeller (65) with movement, and the rotor (61) and stator (62) are located at the inside and outside of connecting seat (2) to be relatively spaced apart; The connecting seat (2) is equipped with rotor accommodating cavity (63) for accommodating rotor (61) and being integrally formed with the connecting seat (2), and the mouth of the rotor accommodating cavity (63) is towards the inner cavity of inner bag (1), and the rotor accommodating cavity (63) is outwardly protruding to form a connecting shaft (64) for relatively fixedly connecting with stator (62), and the rotor (61) and stator (62) are located at the inside and outside of connecting seat (2) to make the rotor (61) and stator (62) relatively spaced apart;The stator (62) is coaxially and relatively fixedly provided in the rotor accommodating cavity (63), and the rotor (61) is rotatably connected with the positioning shaft (631);The bottom of the rotor accommodating cavity (63) is provided with a positioning hole (632) for inserting one end of the positioning shaft (631) to fixedly connect the positioning shaft (631) with the rotor accommodating cavity (63), and the other end of the positioning shaft (631) extends into the inner cavity of inner bag (1); The rotor (61) includes a rotor body made of permanent magnetic material rotatably arranged in the rotor accommodating cavity (63), and the impeller (65) is movably connected with the rotor body; The impeller (65) includes a rotating seat (651) and blades (652) arranged on the rotating seat (651), and the rotating seat (651) is integrally injection molded on the rotor body, and the rotating seat (651) is arranged on the outer surface of the positioning shaft (631) and penetrates through the connecting seat (2), and the rotating seat (651) separates the rotor body from the inner cavity of inner bag (1).

2. The heating device for electric water heater according to claim 1, wherein The stator (62) includes a stator body (621) relatively fixedly connected with the connecting shaft (64) and coil winding (622) arranged on the stator body (621).

3. The heating device for electric water heater according to claim 1, wherein The inner end port of the hot water pipe (4) extends towards the sealing end of the inner bag (1) and is inclined to the inner side wall of the inner bag (1) relative to the central axis of the inner bag (1).

4. The heating device for electric water heater according to claim 3, wherein The inner bag (1) is further provided with a sleeve shell (8) covering the heating pipe (3) and the hot water pipe (4), and the inner cavity of the sleeve shell (8) is communicated with the inner cavity of the inner bag (1).

5. The heating device for electric water heater according to claim 4, wherein The sleeve shell (8) includes a hollow main shell (81) with two open ends, the main shell (81) is provided with a baffle (82) for sealing one of the open ends of the main shell (81), the lower side wall of the main shell (81) is provided with a water inlet and outlet hole (811), and the inner end port of the hot water pipe (4) extends towards one side of the baffle (82) and is inclined to the upper side wall of the main shell (81).

6. The heating device according to any one of claims 1-5, characterized in that When the rotor (61) drives the impeller (65) to rotate, the water pressure in the circumferential region of the impeller (65) is greater than the water pressure in the axial center of the impeller (65), so that the water in the circumferential region of the impeller (65) flows along the inner side wall of the inner container (1) to the end away from the impeller (65), and at the same time, the water in the axial center of the impeller (65) flows to the circumferential side of the impeller (65) to circulate.

7. The heating device for electric water heater according to claim 1, wherein The inner container (1) is a horizontal inner container or a vertical inner container.

8. An electric water heater characterised in that The electric water heater comprises a body, and the body is provided with the heating device for electric water heater according to any one of claims 1-7.

9. A heating method of an electric water heater, characterized by The heating method comprises the following steps: S1, heating, the heating pipe (3) is powered on to heat the water in the sleeve (8); S2, the heated water in the sleeve (8) rises to the upper side wall in the sleeve (8), when the hot water is used, the heated water in the sleeve (8) flows out from the hot water pipe (4) inlet port, and the cold water pipe (5) enters the cold water; S3, when the use of hot water is stopped and the water temperature in the inner container (1) is lower than the preset temperature, the hot water in the sleeve (8) flows out from the sleeve (8) to the outside through the water inlet and outlet hole (811) in the lower side wall of the sleeve (8), and the vortex generator assembly (6) works to drive the rotor (61) to drive the impeller (65) to rotate, at this moment, the water pressure in the circumferential region of the impeller (65) is greater than the water pressure in the axial center of the impeller (65), so that the water in the circumferential region of the impeller (65) flows along the inner side wall of the inner container (1) to the end away from the impeller (65), and at the same time, the water in the axial center of the impeller (65) flows to the circumferential side of the impeller (65) to circulate, so that the cold water and the hot water in the inner container (1) are mixed; S4, when the water in the inner container (1) is heated to the preset temperature, the heating pipe (3) stops working and enters the standby state.

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