An electric oil heater

Abstract

The application provides an electric oil heater and relates to the technical field of household appliances, and solves the technical problem of slow heat dissipation rate of the electric oil heater in the prior art, which leads to slow temperature rise in a use space. The electric oil heater comprises at least two heater body pieces and a rotary sealing structure, the rotary sealing structure is connected between oil pockets of two adjacent heater body pieces, so that the two adjacent heater body pieces can relatively rotate along the central axis of the oil pockets of the heater body pieces, and the oil pockets of the two adjacent heater body pieces are connected in communication through the rotary sealing structure to form an oil path main body. The application is used for providing an electric oil heater which can improve the heat dissipation rate of the electric oil heater and realize fast temperature rise in a use space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to an electric oil heater. BACKGROUND

[0002] Electric heaters use electricity as the main energy source to provide heating for human bodies through direct contact, warm air convection, heat radiation and other ways. Among them, the electric oil heater is filled with heat-conducting medium such as heat-conducting oil. When the power is turned on, the heat-conducting oil is heated, and then the heat is dissipated along the heat pipe or the fin. Due to its convenience of carrying and using, it has been widely used in homes, hotels and other places, especially in the cold and cold winter in the north, and is more widely used in places without heating, and the use place is very wide.

[0003] However, the traditional electric oil heater has a full-welded fixed structure, and the heat dissipation fins are fixed and cannot be moved, so the heat dissipation area is fixed. When the electric oil heater works, the heat in the heat-conducting oil is dissipated into the external air through the fins. The disadvantage is that the heat dissipation rate is slow, and the fixed heat dissipation fins cannot quickly heat the entire use space.

[0004] The applicant finds that the prior art at least has the following technical problems: the existing electric oil heater has a slow heat dissipation rate, resulting in slow heating in the use space. SUMMARY

[0005] The purpose of the present application is to provide an electric oil heater to solve the technical problem of slow heat dissipation rate of the existing electric oil heater, resulting in slow heating in the use space 。 The preferred technical solutions in the many technical solutions provided by the present application can produce many technical effects, which are described in detail below.

[0006] To achieve the above purpose, the present application provides the following technical solutions:

[0007] The electric oil heater provided by the present application comprises at least two fin body pieces and a rotating sealing structure, the rotating sealing structure is connected between the oil pockets of two adjacent fin body pieces, so that the two adjacent fin body pieces can rotate relative to the central axis of the oil pockets of the fin body pieces, and the oil pockets of the two adjacent fin body pieces are connected through the rotating sealing structure to form an oil path main body.

[0008] The electric oil heater provided by the application comprises a plurality of heater body pieces, a heating body and a rotary sealing structure, the plurality of heater body pieces are connected by the rotary sealing structure, the heater body pieces on the electric oil heater can rotate relatively, heat is dissipated, the heat dissipation area is increased, the heat dissipation rate of the electric oil heater is improved, and the space is rapidly heated; the oil paths are formed by the rotary sealing structure and are connected between the oil pockets of the adjacent heater body pieces, the heating body is arranged in the oil path, the heat conducting oil in the oil path is heated by the heating body, and the heat is dissipated to the space by the heater body pieces.

[0009] As a further optimization of the technical scheme of the application, the rotary sealing structure comprises a fixed part and a rotating part, the fixed part is rotationally connected with the rotating part, a positioning protrusion is arranged on the fixed part, and a limiting clamping groove corresponding to the positioning protrusion is arranged on the rotating part, and the positioning protrusion is movably arranged in the limiting clamping groove.

[0010] In the further optimization, the rotary sealing structure comprises a fixed part and a rotating part, a limiting structure of the positioning protrusion and the limiting clamping groove is arranged between the fixed part and the rotating part, and the positioning protrusion is movably arranged in the limiting clamping groove, so as to limit the rotation range of the fixed part and the rotating part, the two adjacent heater body pieces on the electric oil heater are connected to the fixed part and the rotating part respectively, so that the heater body pieces on the electric oil heater can rotate relatively, heat is dissipated, the heat dissipation area is increased, the heat dissipation rate of the electric oil heater is improved, and the space is rapidly heated.

[0011] As a further optimization of the technical scheme of the application, the positioning protrusion is a circular arc protrusion with an angle of 10-40 degrees, and the limiting clamping groove is a circular arc groove with an angle of 40-70 degrees.

[0012] In the further optimization, the positioning protrusion is a circular arc protrusion, and the limiting clamping groove is a circular arc groove, and the two are matched to achieve better fitting and rotation and improve the rotation accuracy.

[0013] As a further optimization of the technical scheme of the application, the rotating part comprises a positioning member and a rotating member, the limiting clamping groove is arranged on the inner wall of the rotating member, the positioning member is rotationally sleeved outside the fixed part, the positioning member positions the positioning protrusion on the limiting clamping groove, and a first sealing structure is arranged between the fixed part and the rotating member.

[0014] In the further optimization, the rotating part comprises a positioning member and a rotating member, a limiting clamping groove is arranged on the inner wall of the rotating member, the positioning protrusion on the fixing part is inserted into the limiting clamping groove, and the positioning protrusion is abutted against in the limiting clamping groove through the positioning member arranged outside the fixing part, so that the positioning protrusion has only a circumferential direction freedom and can only rotate relatively, thereby realizing the relative rotation of the rotating part and the fixing part, and the rotation interval is controllable. Moreover, the first sealing structure is arranged between the fixing part and the rotating member, thereby realizing the rotation sealing of the fixing member and the rotating member, improving the sealing effect, and avoiding the oil leakage phenomenon.

[0015] As the further optimization of the technical scheme of the application, the first sealing structure comprises a first sealing ring and a sealing ring, and the first sealing ring and the sealing ring are arranged in the first sealing groove on the fixing part, one side of the sealing ring is provided with an annular groove, and the sealing ring is buckled on the first sealing ring through the annular groove.

[0016] In the further optimization, the first sealing structure comprises a first sealing ring and a sealing ring, and through the combined use of the sealing ring and the first sealing ring, the first sealing ring is first installed in the first sealing groove, and then the sealing ring is installed. In this case, the first sealing ring provides a pre-tightening force to the sealing ring, so that the sealing surface of the sealing ring can tightly adhere to the rotating member.

[0017] As the further optimization of the technical scheme of the application, the first sealing structure further comprises a first O-shaped ring, and a first annular groove is arranged on the end face of the fixing part, and the first O-shaped ring is arranged in the first annular groove.

[0018] In the further optimization, the first O-shaped ring realizes the sealing between the end face of the fixing part and the rotating member, and serves as the first basic sealing, thereby reducing the sealing pressure of the first sealing ring and the sealing ring and better realizing dynamic sealing.

[0019] As the further optimization of the technical scheme of the application, the outer side face of the sealing ring is in a stepped shape.

[0020] In the further optimization, the outer side face of the sealing ring is in a stepped shape, the outer ring face of the sealing ring is designed as a stepped sealing lip face, and under the action of the pre-tightening force provided by the sealing ring, the entire outer ring face will have a certain extrusion deformation, but the structure will not be deformed and dislocated, thereby tightly adhering to the inner wall face of the rotating member and realizing dynamic sealing.

[0021] As the further optimization of the technical scheme of the application, a threaded member and a locking member are arranged on the side of the fixing part away from the rotating part, the threaded member is sleeved outside the fixing part, the fixing part is abutted against the locking member through the threaded member, and a second sealing structure is arranged between the locking member and the fixing part.

[0022] In this further optimization, a threaded part and a locking part are provided at the other end of the fixing part. The threaded part fixes the fixing part to the locking part, and the locking part is connected to the oil pocket of the tread plate, thereby ensuring that the fixing part is fixedly connected to the tread plate on the locking part side, and a sealed connection is achieved through the second sealing structure.

[0023] As a further optimization of the technical solution of the present invention, a second annular groove is provided on the end face of the fixing part, and the second sealing structure includes a second O-ring, which is disposed in the second annular groove.

[0024] In this further optimization, the end of the fixed part away from the rotating part is fixedly connected to the tread plate, and the end is sealed to the locking member by a second O-ring to ensure the sealing effect of the rotary sealing structure and prevent oil leakage.

[0025] As a further optimization of the technical solution of the present invention, a third sealing structure is provided between the threaded part and the locking part, and the third sealing structure is a sealing gasket.

[0026] In this further optimization, a second O-ring and a sealing gasket are used to achieve sealing between the fixing part and the locking part, and between the locking part and the threaded part, respectively, providing double-layer sealing protection.

[0027] As a further optimization of the technical solution of the present invention, the treadmill plate includes a fixed treadmill plate and a rotating treadmill plate. The fixed treadmill plate is disposed on the frame, and at least one rotating treadmill plate is disposed between two adjacent fixed treadmill plates.

[0028] In this further optimization, the heat sink includes a fixed heat sink and a rotating heat sink. The fixed heat sink is fixed to the frame, and the rotating heat sink is connected between two adjacent fixed heat sinks through a rotary sealing structure. The rotary sealing structure enables relative rotation between the rotating heat sink and the fixed heat sink, thereby increasing the heat dissipation area.

[0029] As a further optimization of the technical solution of the present invention, a locking structure is provided between the rotating slab and the frame. The locking structure includes a fixing post provided on the frame and a notch provided on the rotating slab, and the fixing post is engaged in the notch.

[0030] In this further optimization, a locking structure is set up so that the rotating treadmill piece can be locked onto the frame. Specifically, a fixing post is set on the frame and a notch is set on the treadmill piece. The fixing post is locked in the notch, thereby locking the rotating treadmill piece. When the treadmill piece needs to be rotated, it is pushed forcefully to separate the fixing post from the notch, thus completing the separation.

[0031] As a further optimization of the technical solution of the present invention, the frame includes a base and a top frame. A receiving groove is provided on the base, and the fixing plate is inserted into the receiving groove. A snap-fit ​​groove is provided on the top frame, and the snap-fit ​​groove snaps into the top of the fixing plate.

[0032] In this further optimization, the mounting slots and snap-fit ​​slots are used to fix the fixing plate between the base and the top frame, making installation and disassembly convenient and improving the efficiency of installation, disassembly and maintenance.

[0033] As a further optimization of the technical solution of the present invention, casters are provided at the bottom of the base.

[0034] As a further optimization of the technical solution of the present invention, the slab is provided with a main oil passage, a branch oil passage and a return oil passage. The main oil passage is connected to the oil tank, the branch oil passage is provided on the main oil passage, and the branch oil passage is distributed in a leaf vein pattern on both sides of the main oil passage.

[0035] The return oil circuit is connected to the oil tank and is also connected to the ends of the main oil circuit and the branch oil circuit, so as to allow the heat transfer oil in the main oil circuit and the branch oil circuit to flow back into the oil tank.

[0036] In this further optimization, the oil path of the heat exchanger plate adopts a biomimetic leaf vein design, mimicking the way leaves transport water and nutrients using veins in nature. After heating, the heat transfer oil's temperature rises, its density changes, and it rises along the central main oil path, then diffuses to all parts of the heat exchanger plate through branch oil paths, conducting heat and raising the overall temperature of the heat exchanger plate. After the heat transfer oil cools down, it flows back along the return oil path around the edge of the heat exchanger plate. This achieves a complete oil circulation system with the entire heat exchanger plate as the core, further improving the heat dissipation effect.

[0037] As a further optimization of the technical solution of the present invention, the diameter of the main oil passage is larger than the diameter of the return oil passage.

[0038] As a further optimization of the technical solution of the present invention, the return oil circuit includes an oil guide section and a return section. The oil guide section is arranged along the edge of the tumbler plate and connects the ends of the main oil circuit and the branch oil circuit. The return section is arranged inclined downward between the oil guide section and the oil bag.

[0039] In this further optimization, since the diameter of the main oil circuit at the oil tank is larger than that of the return oil circuit, and the return oil circuit has a certain slope in the lower part of the return section, the heat transfer oil can rise from the main oil circuit and return to the return oil circuit, thus realizing oil circuit circulation.

[0040] The beneficial effects of the present invention are as follows: The electric oil heater provided by the present invention includes a plurality of radiator plates, a heating element, and a rotary sealing structure. The plurality of radiator plates are connected by a rotary sealing structure, so that the radiator plates on the electric oil heater can rotate relative to each other, thereby expanding heat dissipation, increasing the heat dissipation area, thereby improving the heat dissipation rate of the electric oil heater, and realizing rapid heating in the use space. The oil packs of adjacent radiator plates are connected by a rotary sealing structure to form an oil circuit body. The heating element is set in the oil circuit body, and the heat-conducting oil in the oil circuit is heated by the heating element and the heat is dissipated to the use space through the radiator plates. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of the electric oil heater of the present invention;

[0043] Figure 2 This is a schematic diagram of the unfolded structure of the electric oil heater of the present invention;

[0044] Figure 3 This is an exploded view of the electric oil heater of the present invention;

[0045] Figure 4 This is a cross-sectional view (a) of the rotary sealing structure of the present invention;

[0046] Figure 5 This is a cross-sectional view (II) of the rotary sealing structure of the present invention;

[0047] Figure 6 This is a partial structural cross-sectional view of the rotary sealing structure of the present invention;

[0048] Figure 7 This is a partial structural schematic diagram of the rotary sealing structure of the present invention;

[0049] Figure 8 This is a cross-sectional view of the sealing ring and the first sealing ring of the present invention;

[0050] Figure 9 This is a schematic diagram of the internal oil passage structure of the slab body of the present invention.

[0051] In the diagram: 100, base; 200, top frame; 300, heating element; 400, heating element plate; 500, rotary sealing structure; 600, locking structure; 110, receiving groove; 210, snap-fit ​​groove; 220, fixing post; 410, notch groove; 420, main oil passage; 430, branch oil passage; 440, return oil passage; 441, oil guide section; 442, return section; 510, fixing part; 511, second annular groove; 512, positioning. 513. Protrusion; 514. First sealing groove; 520. First annular groove; 521. Rotating part; 522. Positioning part; 523. Rotating part; 530. Limiting groove; 531. Locking part; 532. Threaded part; 540. Second sealing structure; 550. Third sealing structure; 560. First sealing structure; 561. First sealing ring; 562. First O-ring; 563. Sealing ring; 564. Annular groove. Detailed Implementation

[0052] Please refer to the attached diagram below. Figures 1-9 This document explains the content of the invention and the differences between the invention and existing technologies. The technical solutions (including preferred solutions) of the invention are further described in detail below with reference to accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of a variety of optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of the invention, nor is it convenient to emphasize that each implementation of a technical feature is one of multiple optional implementations. Therefore, those skilled in the art should understand that any technical means provided by the invention can be replaced, or any two or more technical means or features provided by the invention can be combined to obtain new technical solutions. No technical feature or solution in this embodiment limits the scope of protection of the invention. The scope of protection of the invention should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by the invention.

[0053] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] This invention provides an oil-filled radiator that improves the heat dissipation rate and enables rapid heating within the operating space.

[0056] The following is combined Figures 1-9 The technical solution provided by this invention will be described in more detail below.

[0057] The electric oil heater provided by the present invention includes a base 100, a top frame 200, a heating element 300, and a plurality of heating plates 400. The oil pockets of two adjacent heating plates 400 are connected by a rotary sealing structure 500, so that the two adjacent heating plates 400 can rotate relative to each other along the central axis of the oil pockets of the heating plates 400. The oil pockets of two adjacent heating plates 400 are connected by the rotary sealing structure 500 to form an oil circuit body. The heating element 300 is disposed in the oil circuit body.

[0058] In one embodiment, nine treadle plates 400 are provided, and all nine treadle plates 400 are connected by a rotary sealing structure 500. Among them, three treadle plates 400 are fixedly disposed between the base 100 and the top frame 200. For easy distinction, these three treadle plates 400 are referred to as fixed treadle plates 400. Among the three fixed treadle plates 400, three rotatable treadle plates 400 are respectively disposed between two adjacent fixed treadle plates 400. These rotatable treadle plates 400 are referred to as rotating treadle plates 400.

[0059] It should be noted that the number of rotating heat sink plates 400 and fixed heat sink plates 400 can be selectively set according to the heat dissipation effect. The ratio of rotating heat sink plates 400 to fixed heat sink plates 400 can be 1:1, 2:1, 3:1, 4:1, or 3:1, etc.

[0060] Specifically, a receiving groove 110 is provided on the base 100, and the fixing plate 400 is inserted into the receiving groove 110. A snap-fit ​​groove 210 is provided on the top frame 200, and the snap-fit ​​groove 210 snaps onto the top end of the fixing plate 400. By providing the receiving groove 110 and the snap-fit ​​groove 210 on the base 100 and the top frame 200 respectively, the fixing plate 400 is fixed between the base 100 and the top frame 200.

[0061] A locking structure 600 is provided between the rotating sill plate 400 and the top frame 200. The locking structure 600 includes a fixing post 220 disposed on the top frame 200 and a notch 410 disposed on the rotating sill plate 400. The fixing post 220 is engaged in the notch 410. Under normal circumstances, the rotating sill plate 400 can be locked to the top frame 200 through the cooperation of the notch 410 and the fixing post 220. When it is necessary to increase the heat dissipation, the rotating sill plate 400 can be forcefully moved to disengage the notch 410 from the fixing post 220, thereby unfolding the rotating sill plate 400, increasing the heat dissipation convection area, improving the heat diffusion rate, and enhancing the user experience and comfort.

[0062] Furthermore, the rotary sealing structure 500 includes a fixing part 510, a rotating part 520, and a locking part 530. The first end of the fixing part 510 is rotatably connected to the rotating part 520, and the second end of the fixing part 510 is fixedly connected to the locking part 530. Two adjacent tumbler pieces 400 are respectively connected to the rotating part 520 and the locking part 530, so that the tumbler piece 400 connected to the rotating part 520 can rotate relative to the tumbler piece 400 connected to the locking part 530.

[0063] Specifically, the locking part 530 includes a threaded part 531 and a locking part 532. The locking part 532 is connected to the oil pocket of the tread plate 400. The threaded part 531 is sleeved on the outside of the fixing part 510, and the threaded part 531 abuts the fixing part 510 against the locking part 532. A second sealing structure 540 is provided between the locking part 532 and the fixing part 510. The second sealing structure 540 includes a second O-ring. A second annular groove 511 is provided on the second end face of the fixing part 510. The second O-ring is disposed in the second annular groove 511 to achieve a sealed connection between the second end of the fixing part 510 and the locking part 532. A third sealing structure 550 is provided between the threaded part 531 and the locking part 532. The third sealing structure 550 is a sealing gasket, which provides a double-layer sealing guarantee.

[0064] The rotating part 520 includes a positioning member 521 and a rotating member 522. A limiting groove 523 is provided on the inner wall of the rotating member 522. A positioning protrusion 512 is provided on the first end of the fixed part 510. The positioning protrusion 512 corresponds to the limiting groove 523. The positioning member 521 is rotatably sleeved on the outside of the fixed part 510, and the positioning member 521 positions the positioning protrusion 512 on the limiting groove 523, so that the rotating part 520 and the fixed part 510 can only rotate relative to each other within the rotation range of the positioning protrusion 512 and the limiting groove 523.

[0065] Specifically, the positioning protrusion 512 is an arc protrusion with an angle of 10-40 degrees, and the limiting groove 523 is an arc groove with an angle of 40-70 degrees. In practical applications, the rotation range can be selectively set according to the heat dissipation effect.

[0066] For example, in one embodiment, the positioning protrusion 512 is an arc protrusion with an angle of 15°, and the limiting groove 523 is an arc groove with an angle of 60°. In the initial state, the positioning protrusion 512 is located in the middle of the limiting groove 523. When the rotating part 520 rotates relative to the fixed part 510, the limiting groove 523 can rotate 22.5° clockwise or counterclockwise, that is, two adjacent treadmill pieces 400 can rotate relative to each other by 22.5°. If three consecutive treadmill pieces 400 are used as rotating treadmill pieces 400, the maximum rotation angle is 66.75°.

[0067] The positioning protrusion 512 can also be an arc protrusion with an angle of 20°, corresponding to the relative rotation of two adjacent tack pieces 400 by 15°. If three consecutive tack pieces 400 are used as rotating tack pieces 400, the maximum rotation angle is 45°.

[0068] Furthermore, a first sealing structure 560 is provided between the fixing part 510 and the rotating member 522. The first sealing structure 560 includes a first sealing ring 561, a first O-ring 562, and a sealing ring 563. The first sealing ring 561 and the sealing ring 563 are both disposed in a first sealing groove 513 on the fixing part 510. An annular groove 564 is provided on one side of the sealing ring 563, and the sealing ring 563 is fastened to the first sealing ring 561 through the annular groove 564.

[0069] By combining the sealing ring 563 with the first sealing ring 561, the first sealing ring 561 is first installed in the first sealing groove 513, and then the sealing ring 563 is installed. In this case, the first sealing ring 561 will provide a pre-tightening force to the sealing ring 563, so that its sealing surface can be tightly attached to the rotating part 522. In addition, the outer surface of the sealing ring 563 is stepped, and the outer ring surface of the sealing ring 563 is designed as a stepped sealing lip. Under the action of the pre-tightening force provided by the sealing ring 563, the entire outer ring surface will have a certain amount of extrusion deformation, but its structure will not deform or misalign, thus tightly adhering to the inner wall surface of the rotating part 522 to achieve dynamic sealing.

[0070] Furthermore, a first annular groove 514 is provided on the end face of the fixing part 510, and the first O-ring 562 is disposed in the first annular groove 514. The first O-ring 562 achieves a seal between the end face of the fixing part 510 and the rotating part 522, serving as a first basic seal, reducing the sealing pressure of the first sealing ring 561 and the sealing ring 563, and better achieving dynamic sealing.

[0071] Furthermore, in order to improve the circulation of heat transfer oil within the heat exchanger plate 400, a main oil passage 420, a branch oil passage 430, and a return oil passage 440 are provided within the heat exchanger plate 400. The diameter of the main oil passage 420 is larger than the diameter of the return oil passage 440. The main oil passage 420 is connected to the oil reservoir. The branch oil passage 430 is provided on the main oil passage 420, and the branch oil passage 430 radiates to both sides of the main oil passage 420 in a leaf vein-like distribution.

[0072] The return oil passage 440 includes an oil guiding section 441 and a return section 442. The oil guiding section 441 is disposed along the edge of the tumbler plate 400 and connects the ends of the main oil passage 420 and the branch oil passage 430. The return section 442 is disposed inclined downward between the oil guiding section 441 and the oil tank to allow the heat transfer oil in the main oil passage 420 and the branch oil passage 430 to return to the oil tank.

[0073] The oil circuit of the heat sink plate 400 adopts a biomimetic leaf vein design, mimicking the way leaves transport water and nutrients using veins in nature. After the heat transfer oil is heated, its temperature rises, its density changes, and the oil rises along the main oil circuit 420. Then, it diffuses to all parts of the heat sink plate 400 through the branch oil circuits 430, conducting heat and raising the overall temperature of the heat sink plate 400. After the heat transfer oil cools down, it flows back along the return oil circuit 440 around the edge of the heat sink plate 400. Because the diameter of the main oil circuit 420 at the oil reservoir is larger than the diameter of the return oil circuit 440, and because the return oil circuit 440 has a certain slope in its lower return section 442, the heat transfer oil can rise from the main oil circuit 420 and return through the return oil circuit 440, achieving oil circuit circulation.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electric oil heater, characterized in that, It includes at least two spool plates (400) and a rotary sealing structure (500), the rotary sealing structure (500) being connected between the oil pockets of two adjacent spool plates (400), and the oil pockets of two adjacent spool plates (400) being connected through the rotary sealing structure (500) to form an oil passage body; a heating element (300) is disposed within the oil passage body; The rotary sealing structure (500) includes a fixed part (510) and a rotating part (520). The fixed part (510) is rotatably connected to the rotating part (520). A positioning protrusion (512) is provided on the fixed part (510), and a limiting groove (523) corresponding to the positioning protrusion (512) is provided on the rotating part (520). The positioning protrusion (512) is movably disposed in the limiting groove (523). The rotating part (520) includes a positioning member (521) and a rotating member (522). The limiting groove (523) is disposed on the inner wall of the rotating member (522). A positioning protrusion (512) is provided on the first end of the fixed part (510). The positioning protrusion (512) is positioned opposite to the limiting groove (523). The positioning member (521) is rotatably sleeved on the outside of the fixed part (510), and the positioning member (521) positions the positioning protrusion (512) on the limiting groove (523) so that the rotating part (520) and the fixed part (510) rotate relative to each other within the rotation range of the positioning protrusion (512) and the limiting groove (523). A first sealing structure (560) is provided between the fixed part (510) and the rotating part (522); the first sealing structure (560) includes a first sealing ring (561) and a sealing ring (563), the first sealing ring (561) and the sealing ring (563) are both provided in the first sealing groove (513) on the fixed part (510), and an annular groove (564) is provided on one side of the sealing ring (563), and the sealing ring (563) is fastened to the first sealing ring (561) through the annular groove (564); The first sealing structure (560) further includes a first O-ring (562), and a first annular groove (514) is provided on the end face of the fixing part (510), and the first O-ring (562) is disposed in the first annular groove (514).

2. The electric oil heater according to claim 1, characterized in that, The positioning protrusion (512) is an arc protrusion with an angle of 10-40 degrees, and the limiting groove (523) is an arc groove with an angle of 40-70 degrees.

3. The electric oil heater according to claim 1, characterized in that, The outer surface of the sealing ring (563) is stepped.

4. The electric oil heater according to claim 1, characterized in that, A threaded part (531) and a locking part (532) are provided on the side of the fixed part (510) away from the rotating part (520). The threaded part (531) is sleeved on the outside of the fixed part (510) and the threaded part (531) abuts the fixed part (510) against the locking part (532). A second sealing structure (540) is provided between the locking part (532) and the fixed part (510).

5. The electric oil heater according to claim 4, characterized in that, A second annular groove (511) is provided on the end face of the fixing part (510), and the second sealing structure (540) includes a second O-ring, which is disposed in the second annular groove (511).

6. The electric oil heater according to claim 4, characterized in that, A third sealing structure (550) is provided between the threaded part (531) and the locking part (532), and the third sealing structure (550) is a sealing gasket.

7. The electric oil heater according to any one of claims 1-6, characterized in that, The slab (400) includes a fixed slab (400) and a rotating slab (400). The fixed slab (400) is disposed on the frame, and at least one rotating slab (400) is disposed between two adjacent fixed slabs (400).

8. The electric oil heater according to claim 7, characterized in that, A locking structure (600) is provided between the rotating slab (400) and the frame. The locking structure (600) includes a fixing post (220) provided on the frame and a notch (410) provided on the rotating slab (400). The fixing post (220) is engaged in the notch (410).

9. The electric oil heater according to claim 7, characterized in that, The frame includes a base (100) and a top frame (200). A receiving groove (110) is provided on the base (100), and the fixing plate (400) is inserted into the receiving groove (110). A snap-fit ​​groove (210) is provided on the top frame (200), and the snap-fit ​​groove (210) snaps onto the top of the fixing plate (400).

10. The electric oil heater according to any one of claims 1-6, characterized in that, The slab (400) is provided with a main oil passage (420), a branch oil passage (430) and a return oil passage (440). The main oil passage (420) is connected to the oil tank. The branch oil passage (430) is provided on the main oil passage (420) and the branch oil passage (430) is distributed in a leaf vein pattern on both sides of the main oil passage (420). The return oil passage (440) is connected to the oil tank, and the return oil passage (440) is connected to the end of the main oil passage (420) and the branch oil passage (430) to allow the heat transfer oil in the main oil passage (420) and the branch oil passage (430) to flow back into the oil tank.

11. The electric oil heater according to claim 10, characterized in that, The return oil passage (440) includes an oil guide section (441) and a return section (442). The oil guide section (441) is arranged along the edge of the tumbler plate (400) and connects the ends of the main oil passage (420) and the branch oil passage (430). The return section (442) is arranged inclined downward between the oil guide section (441) and the oil bag.

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