High-power liquid electric heater

Abstract

The invention discloses a high-power liquid electric heater, relates to the field of electric heaters, solves the problem that an existing device is difficult to electrically heat liquid flow efficiently as required, and adopts the following scheme that the high-power liquid electric heater comprises a stainless steel thick film heating tube and a high-power conductor wire; two groups of high-power conductive wires are assembled on two sides of the stainless steel thick-film heating tube, an electric heating plate is assembled at output ends of the two groups of high-power conductive wires, a heat conduction tube is arranged on the inner side of the stainless steel thick-film heating tube, and a heat conduction frame matched with the electric heating plate in specification is fixedly connected to the inner side of the heat conduction tube. A spiral blade is fixedly welded on the outer wall of the heat conduction pipe; according to the high-power liquid electric heater, through the arrangement of the heat conduction pipe structure, the contact area between the high-power liquid electric heater and liquid flow on the peripheral side can be increased through the two sets of spiral blades on the outer wall of the high-power liquid electric heater, in addition, the contact area between the high-power liquid electric heater and the liquid flow can be further increased through the arrangement of all assemblies on the inner side of the heat conduction pipe, and then the efficient electric heating effect on the liquid flow is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of electric heaters, in particular to a high-power liquid electric heater. Background Art

[0002] In recent years, with the substantial growth in the demand for electric vehicles, the demand for electric vehicle air conditioning and heating systems has also grown rapidly. With the continuous improvement of society's energy-saving and environmental protection requirements, electric vehicles have become the development direction of modern automotive industry technology. The change in the power system has led to the heating methods of traditional fuel-powered vehicles, including the use of engine waste heat and the setting of independent fuel heat sources, which are no longer suitable for electric vehicles.

[0003] After searching, the patent application with the number of 201820187256.1 discloses a high-power liquid electric heater, including a stainless steel thick film heating tube, the stainless steel thick film heating tube is provided with a spiral flow channel inside, the stainless steel thick film heating tube is provided with an insulation layer outside, the stainless steel thick film heating tube electrode is welded with a metal lead, the stainless steel thick film heating tube includes a stainless steel seamless tube, the outer surface of the stainless steel seamless tube is coated with an insulating coating, the insulating coating surface is coated with a heating coating, the heating coating includes an electrode pad, and the heating coating surface is coated with a protective coating. The beneficial effects of the present invention are heating speed, rapid response, precise temperature control, high efficiency, safety and environmental protection, and strong practicality;

[0004] The heater currently used in the air-conditioning heating system of electric vehicles is a PTC electric heating component. The PTC electric heating element converts electrical energy into thermal energy and transmits it to the heat exchange fluid flowing through the component to heat the heat exchange fluid. When the heat exchange fluid flows through the air outlet which is a heat pipe, the circulating wind brings the heat to the car compartment to increase the air temperature in the car compartment. However, the existing PTC electric heaters usually use gluing, brazing and other methods to connect the PTC heating plate and the heat dissipation fins. The process is complicated and toxic substances such as adhesives are used. It cannot meet environmental protection requirements, and the adhesives are not easy to disassemble and repair. The above-mentioned application document uses spiral fan blades to conduct heat, thereby realizing efficient electric heating. First of all, the existing PTC heating plate is a rectangular plate. How to efficiently conduct the heat on it to the spiral blades has become a problem to be solved. Secondly, the contact area between a single spiral blade and the surrounding fluid is limited, resulting in limited heat exchange efficiency.

[0005] Therefore, we propose a high-power liquid electric heater. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a high-power liquid electric heater, which solves the problem that the prior devices are difficult to electrically heat the liquid flow with sufficient efficiency according to demand.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-power liquid electric heater, comprising a stainless steel thick film heating tube and a high-power conductive wire assembled therewith and used for energizing, wherein both ends of the stainless steel thick film heating tube are equipped with a plugging disk, and a liquid pipe is fixedly connected to the plugging disk;

[0008] Two groups of high-power conductive wires are installed on both sides of the stainless steel thick film heating tube, and the output ends of the two groups of high-power conductive wires are equipped with electric heating plates. A heat conduction pipe is arranged on the inner side of the stainless steel thick film heating tube, and a heat conduction frame matching the specifications of the electric heating plate is fixedly connected to the inner side of the heat conduction pipe, and spiral blades in contact with the liquid flow inside the stainless steel thick film heating tube are fixedly welded on the outer wall of the heat conduction pipe.

[0009] As a preferred solution of the present invention, two sets of spiral blades in opposite positions are fixedly welded on the outer wall of the heat conducting tube, and the heat conducting tube and the spiral blades are immersed in the liquid flow inside the stainless steel thick film heating tube;

[0010] Among them, the arrangement of two groups of spiral blades can increase the contact area between them and the liquid flow, thereby increasing the contact area between them and the liquid flow and the electric heating effect.

[0011] As a preferred solution of the present invention, the spiral blade includes a group of inner ends fixedly welded to the outer wall of the heat conducting tube, and the spiral blade is also provided with three groups of spiral vertical fins vertically distributed with the spiral horizontal fins, and the spiral horizontal fins and the three groups of spiral vertical fins are an integrated forming frame;

[0012] Among them, the arrangement of the spiral transverse fins and three groups of spiral vertical fins can further increase the contact area between the spiral blade as a whole and the liquid flow, thereby achieving the effect of efficient electric heating.

[0013] As a preferred solution of the present invention, three groups of heat-conducting frames distributed in an annular shape are arranged on the inner side of the heat-conducting pipe, and the heat-conducting frames are rectangular frames, and the inner walls of the heat-conducting frames are closely attached to the outer wall of the electric heating plate;

[0014] The entire rectangular setting of the heat-conducting frame can fully cover and contact the outer wall of the electric heating plate, so that the electric heating plate can conduct heat to the entire heat-conducting frame to achieve efficient conduction of the liquid flow.

[0015] As a preferred solution of the present invention, three groups of external fins are fixedly welded to the outer wall of the heat-conducting frame, and the heat-conducting frame is fixedly welded to the inner wall of the heat-conducting pipe through the three groups of external fins;

[0016] Among them, the setting of three groups of external fins can conduct the heat in the heat conduction frame to the heat conduction pipe, and cooperate with the setting of two groups of spiral blades and their structures on its outer wall to conduct the heat to the external liquid flow, thereby achieving the effect of efficient electric heating.

[0017] As a preferred solution of the present invention, the three groups of heat-conducting frames on the inner side of the heat-conducting pipe are adjacent to each other and connected by three groups of inner fins, and the inner fins are arc-shaped strips;

[0018] Among them, the arrangement of three groups of arc-shaped inner fins can conduct the heat of each group of heat-conducting frames to the inner fins, thereby conducting the heat to the inside, so that the contact between it and the liquid flow can achieve efficient electric heating.

[0019] As a preferred solution of the present invention, a bracket is fixedly welded between the three groups of inner fins on the inner side of the heat-conducting frame, and the bracket is provided with bracket grooves distributed linearly in the vertical direction;

[0020] The arrangement of the bracket and the upper bracket groove can conduct heat inward, so that the contact between the inner fins and the bracket and the liquid flow can achieve efficient heat conduction.

[0021] As a preferred solution of the present invention, the high-power conductive wire is electrically connected to three groups of shunt conductive wires at the end of the inner side of the stainless steel thick film heating tube, and the outer end of each group of shunt conductive wires is electrically connected to an electric heating plate, and the three groups of electric heating plates are arranged on the inner side of the heat conduction frame in the heat conduction tube;

[0022] Among them, the setting of three groups of diverter conductive wires can divide the large current flowing in the high-power conductive wires into three groups of small currents, and then cooperate with three groups of electric heating plates to perform decentralized electric heating to ensure the overall electric heating efficiency.

[0023] As a preferred solution of the present invention, a sealing seat encapsulated on the outer end side of the heat-conducting frame is fixedly installed at the connection between the shunt conductive wire and the electric heating plate, and the sealing seat is mounted on both ends of the heat-conducting frame by waterproof adhesive;

[0024] Among them, the setting of the sealing seat can prevent the liquid flow from entering the inner side of the heat-conducting frame and directly contacting the electric heating plate to cause a short circuit, thereby ensuring the stability of the entire structure and the high efficiency and safety of electric heating.

[0025] As a preferred solution of the present invention, a mounting frame made of plastic is installed on the inner wall of the stainless steel thick film heating tube, and the inner wall of the mounting frame is fixedly sleeved on the inner side of the end of the heat conducting tube;

[0026] Among them, the setting of the mounting frame facilitates the fixed installation of the entire heat conduction pipe on the inner side of the stainless steel thick film heating pipe, thereby ensuring the stability of the subsequent heat conduction of the liquid flow.

[0027] The present invention provides a high-power liquid electric heater, which has the following beneficial effects:

[0028] 1. The high-power liquid electric heater can increase the contact area with the surrounding liquid flow through the two sets of spiral blades on its outer wall through the arrangement of the heat pipe structure. In addition, the arrangement of the components inside the heat pipe can further increase the contact area between it and the liquid flow, thereby achieving the effect of high-efficiency electric heating of the liquid flow, solving the problem that the existing device is difficult to perform high-efficiency electric heating of the liquid flow according to demand;

[0029] 2. The high-power liquid electric heater, through the arrangement of the high-power conductive wire and the three groups of electric heating plates connected thereto, can convert the high-power current transmitted in the high-power conductive wire into three groups of low-power circuits, and make the three groups of electric heating plates perform electric heating synchronously as a whole, thereby ensuring the efficiency of electric heating and subsequent heat conduction, and solving the problem that the existing device is difficult to perform efficient electric heating according to demand;

[0030] 3. The high-power liquid electric heater can fill the inner side of the stainless steel thick film heating tube with liquid flow through the overall structure, and can perform efficient liquid electric heating on the inner side of the stainless steel thick film heating tube in combination with the high-power conductive wire and the structure on the heat conducting tube. At the same time, the overall structure is small and occupies a small area. At the same time, the heating speed is fast, the response is rapid, the temperature control is precise, the efficiency is high, and it is safe and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the inner side of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the electric heating plate of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the stainless steel thick film heating tube of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the heat conducting pipe of the present invention;

[0036] Figure 6 It is a schematic diagram of the spiral blade structure of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the inner side of the heat conducting pipe of the present invention;

[0038] Figure 8 Schematic diagram of the structure of the support of the present invention.

[0039] In the figure: 1. Stainless steel thick film heating tube; 2. Blocking plate; 3. High-power conductive wire; 4. Mounting frame; 5. Heat pipe; 51. Heat conduction frame; 52. External fins; 53. Internal fins; 54. Bracket; 55. Frame slot; 6. Spiral blades; 61. Spiral horizontal fins; 62. Spiral vertical fins; 7. Shunt conductive wire; 8. Electric heating plate; 9. Sealing seat; 10. Liquid pipe. DETAILED DESCRIPTION

[0040] 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.

[0041] See also Figure 1-8 The embodiment of the present invention provides a technical solution: a high-power liquid electric heater, comprising a stainless steel thick film heating tube 1 and a high-power conductive wire 3 assembled therewith and used for energizing, wherein both ends of the stainless steel thick film heating tube 1 are equipped with a plugging disk 2, and a liquid pipe 10 is fixedly connected to the plugging disk 2; two groups of high-power conductive wires 3 are assembled on both sides of the stainless steel thick film heating tube 1, and the output ends of the two groups of high-power conductive wires 3 are equipped with an electric heating plate 8, a heat conducting tube 5 is arranged on the inner side of the stainless steel thick film heating tube 1, a heat conducting frame 51 matching the specifications of the electric heating plate 8 is fixedly connected to the inner side of the heat conducting tube 5, and a spiral blade 6 in contact with the liquid flow inside the stainless steel thick film heating tube 1 is fixedly welded on the outer wall of the heat conducting tube 5.

[0042] Two sets of spiral blades 6 in opposite positions are fixedly welded on the outer wall of the heat pipe 5, and the heat pipe 5 and the spiral blades 6 are immersed in the liquid flow inside the stainless steel thick film heating tube 1; wherein, the setting of the two sets of spiral blades 6 can increase the contact area between them and the liquid flow, thereby increasing the contact area between them and the liquid flow and the electric heating effect.

[0043] The spiral blade 6 includes a group of inner ends fixedly welded to the outer wall of the heat-conducting tube 5, and three groups of spiral vertical fins 62 are also arranged in the spiral blade 6, which are perpendicularly distributed to the spiral transverse fins 61, and the spiral transverse fins 61 and the three groups of spiral vertical fins 62 are an integrally formed frame; wherein, the arrangement of the spiral transverse fins 61 and the three groups of spiral vertical fins 62 can further increase the contact area between the spiral blade 6 as a whole and the liquid flow, thereby achieving the effect of efficient electric heating.

[0044] Three groups of heat-conducting frames 51 distributed in an annular shape are arranged on the inner side of the heat-conducting tube 5. The heat-conducting frame 51 is a rectangular frame, and the inner wall of the heat-conducting frame 51 is tightly attached to the outer wall of the electric heating plate 8. The entire rectangular setting of the heat-conducting frame 51 can fully cover and contact the outer wall of the electric heating plate 8, so that the electric heating plate 8 can conduct heat to the entire heat-conducting frame 51, thereby realizing efficient conduction of the liquid flow.

[0045] The outer wall of the heat-conducting frame 51 is fixedly welded with three groups of external fins 52, and the heat-conducting frame 51 is fixedly welded to the inner wall of the heat-conducting tube 5 through the three groups of external fins 52; wherein, the setting of the three groups of external fins 52 enables it to conduct the heat in the heat-conducting frame 51 to the heat-conducting tube 5, and cooperate with the setting of the two groups of spiral blades 6 and their structures on its outer wall to conduct the heat to the liquid flow on the outside, thereby achieving the effect of efficient electric heating.

[0046] The three groups of heat-conducting frames 51 on the inner side of the heat-conducting tube 5 are adjacently connected by welding through three groups of inner fins 53, and the inner fins 53 are arc-shaped strips; wherein, the arrangement of the three groups of arc-shaped inner fins 53 can conduct the heat of each group of heat-conducting frames 51 to the inner fins 53, thereby conducting the heat to the inside, so that the contact between it and the liquid flow can achieve efficient electric heating.

[0047] A bracket 54 is fixedly welded between the three groups of inner fins 53 on the inner side of the heat-conducting frame 51, and a bracket groove 55 is provided in the bracket 54 which is linearly distributed in the vertical direction; wherein, the setting of the bracket 54 and the upper bracket groove 55 can conduct heat inward, so that the contact between the inner fins 53 and the bracket 54 and the liquid flow can achieve efficient heat conduction.

[0048] Among them, the high-power liquid electric heater, through the setting of the heat pipe 5 structure, can increase the contact area with the surrounding liquid flow through the two groups of spiral blades 6 on its outer wall. In addition, the setting of the components on the inner side of the heat pipe 5 can further increase the contact area between it and the liquid flow, thereby achieving the effect of efficient electric heating of the liquid flow, solving the problem that the existing device is difficult to perform efficient electric heating of the liquid flow according to demand.

[0049] Embodiment 2:

[0050] The high-power conductive wire 3 is located at the end on the inner side of the stainless steel thick film heating tube 1 and is electrically connected to three groups of diversion conductive wires 7. The outer end of each group of diversion conductive wires 7 is electrically connected to an electric heating plate 8, and the three groups of electric heating plates 8 are arranged on the inner side of the heat conducting frame 51 in the heat conducting tube 5; wherein, the arrangement of the three groups of diversion conductive wires 7 can evenly divide the high current flowing in the high-power conductive wire 3 into three groups of small currents, and then cooperate with the three groups of electric heating plates 8 to perform decentralized electric heating, thereby ensuring the overall electric heating efficiency.

[0051] A sealing seat 9 encapsulated on the outer end side of the heat-conducting frame 51 is fixedly installed at the connection between the shunt conductive wire 7 and the electric heating plate 8, and the sealing seat 9 is mounted on both ends of the heat-conducting frame 51 by waterproof adhesive; wherein, the setting of the sealing seat 9 can prevent the liquid flow from entering the inner side of the heat-conducting frame 51 and directly contacting the electric heating plate 8 to cause a short circuit, thereby ensuring the stability of the entire structure and the high efficiency and safety of electric heating.

[0052] The inner wall of the stainless steel thick film heating tube 1 is installed with a mounting frame 4 made of plastic, and the inner wall of the mounting frame 4 is fixedly sleeved on the inner side of the end of the heat conducting tube 5; wherein, the setting of the mounting frame 4 facilitates the fixed installation of the entire heat conducting tube 5 on the inner side of the stainless steel thick film heating tube 1, thereby ensuring the subsequent stability of the liquid flow heat conduction.

[0053] Among them, the high-power liquid electric heater, through the arrangement of the high-power conductive wire 3 and the three groups of electric heating plates 8 connected thereto, can convert the high-power current transmitted in the high-power conductive wire 3 into three groups of low-power circuits, and make the three groups of electric heating plates 8 perform electric heating synchronously as a whole, thereby ensuring the efficiency of electric heating and subsequent heat conduction, and solving the problem that the existing device is difficult to perform efficient electric heating according to demand;

[0054] In addition, the high-power liquid electric heater, through the setting of the overall structure, can fill the liquid flow into the inner side of the stainless steel thick film heating tube 1, and cooperate with the setting of the high-power conductive wire 3 and the structure of the heat conducting tube 5, it can perform efficient liquid electric heating on the inner side of the stainless steel thick film heating tube 1. At the same time, the overall structure is small and occupies a small area. At the same time, the heating speed is fast, the response is rapid, the temperature control is precise, the efficiency is high, and it is safe and environmentally friendly.

[0055] The working principle and use process of the present invention are as follows: when the device is required to perform electric heating, the high-power conductive wire 3 divides the high-power current into three groups of small currents and transmits them to the electric heating plate 8 for corresponding electric heating. At the same time, the contact between the electric heating plate 8 and the heat-conducting frame 51 facilitates the heat generated in the electric heating plate 8 to be transmitted to the heat-conducting frame 51. At the same time, the heat in the heat-conducting frame 51 is transmitted outward to the spiral blades 6 and each component, and combined with the setting of the liquid flow transmitted by the inner side of the stainless steel thick film heating tube 1, the contact area between it and the liquid flow can be guaranteed, thereby achieving the effect of efficient electric heat conversion and subsequent heat conduction.

[0056] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-power liquid electric heater, characterized in that: It comprises a stainless steel thick film heating tube (1) and a high-power conductive wire (3) assembled therewith and used for conducting electricity, wherein both ends of the stainless steel thick film heating tube (1) are equipped with a plugging disk (2), and a liquid pipe (10) is fixedly connected to the plugging disk (2); Two groups of high-power conductive wires (3) are installed on both sides of the stainless steel thick film heating tube (1), and the output ends of the two groups of high-power conductive wires (3) are installed with electric heating plates (8). A heat conduction tube (5) is arranged on the inner side of the stainless steel thick film heating tube (1), and a heat conduction frame (51) matching the specifications of the electric heating plate (8) is fixedly connected to the inner side of the heat conduction tube (5), and spiral blades (6) in contact with the liquid flow inside the stainless steel thick film heating tube (1) are fixedly welded on the outer wall of the heat conduction tube (5).

2. A high-power liquid electric heater according to claim 1, characterized in that: Two groups of spiral blades (6) in opposite positions are fixedly welded on the outer wall of the heat-conducting tube (5), and the heat-conducting tube (5) and the spiral blades (6) are immersed in the liquid flow inside the stainless steel thick film heating tube (1).

3. A high-power liquid electric heater according to claim 2, characterized in that: The spiral blade (6) comprises a group of inner ends fixedly welded to the outer wall of the heat conducting tube (5), and the spiral blade (6) is also provided with three groups of spiral vertical fins (62) vertically distributed with the spiral transverse fins (61), and the spiral transverse fins (61) and the three groups of spiral vertical fins (62) are integrally formed.

4. A high-power liquid electric heater according to claim 1, characterized in that: Three groups of heat-conducting frames (51) distributed in an annular shape are arranged on the inner side of the heat-conducting pipe (5); the heat-conducting frames (51) are rectangular frames, and the inner walls of the heat-conducting frames (51) are tightly attached to the outer wall of the electric heating plate (8).

5. A high-power liquid electric heater according to claim 4, characterized in that: Three groups of external fins (52) are fixedly welded to the outer wall of the heat-conducting frame (51), and the heat-conducting frame (51) is fixedly welded to the inner wall of the heat-conducting pipe (5) via the three groups of external fins (52).

6. A high-power liquid electric heater according to claim 5, characterized in that: The three groups of heat-conducting frames (51) on the inner side of the heat-conducting tube (5) are adjacently connected by welding through three groups of inner fins (53), and the inner fins (53) are arc-shaped strips.

7. A high-power liquid electric heater according to claim 6, characterized in that: A bracket (54) is fixedly welded between the three groups of inner fins (53) on the inner side of the heat-conducting frame (51), and bracket grooves (55) distributed linearly in the vertical direction are arranged in the bracket (54).

8. A high-power liquid electric heater according to claim 1, characterized in that: The high-power conductive wire (3) is electrically connected to three groups of shunt conductive wires (7) at the end located on the inner side of the stainless steel thick film heating tube (1), and the outer end of each group of shunt conductive wires (7) is electrically connected to an electric heating plate (8), and the three groups of electric heating plates (8) are arranged on the inner side of the heat conduction frame (51) in the heat conduction tube (5).

9. A high-power liquid electric heater according to claim 8, characterized in that: A sealing seat (9) encapsulated on the outer end side of the heat-conducting frame (51) is fixedly installed at the connection between the shunt conductive wire (7) and the electric heating plate (8), and the sealing seat (9) is mounted on both ends of the heat-conducting frame (51) by waterproof adhesive.

10. A high-power liquid electric heater according to claim 1, characterized in that: The inner wall of the stainless steel thick film heating tube (1) is installed with a mounting frame (4) made of plastic, and the inner wall of the mounting frame (4) is fixedly sleeved on the inner side of the end of the heat conducting tube (5).

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