Heating element

Abstract

The utility model relates to the technical field of fluid heating equipment, in particular to a heating element which comprises a metal base material and a first end cover which are integrally formed, the metal base material is fixed with the first end cover, at least two flow channels are arranged in the metal base material, the first end cover is provided with a first cavity which is at least communicated with the two flow channels, and the first end cover is provided with a second cavity which is at least communicated with the two flow channels. An electrothermal film layer is arranged on the surface of the metal base material, and at least two electrode layers are arranged on the electrothermal film layer. According to the device, the electric heating film layer is heated by electrifying the electrode layer, heat is conducted to fluid flowing through the flow channels through the metal base material, the fluid is heated, the multiple flow channels are communicated through the first cavity, the production cost of the device is reduced, automatic production is facilitated, and the production efficiency is improved. And the structure is beneficial to reducing the volume of the heating assembly and saving the space occupancy rate.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid heating equipment, in particular to a heating element. Background Art

[0002] In the prior art, a flow channel heater generally uses a plurality of quartz tubes as a base, and the plurality of quartz tubes are assembled using an assembled structure. Such an assembled structure has a relatively low assembly efficiency and a high cost. Utility Model Content

[0003] The utility model aims to solve the problems pointed out in the background technology and provides a heating element.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A heating element comprises an integrally formed metal substrate and a first end cover, wherein the metal substrate is fixed to the first end cover, the metal substrate has at least two flow channels, the first end cover has a first cavity connecting at least the two flow channels, an electric heating film layer is provided on the surface of the metal substrate, and at least two electrode layers are provided on the electric heating film layer.

[0006] At least two of the flow channels are arranged adjacent to each other in sequence, there are at least two first cavities, two adjacent first cavities are blocked, and any one of the first cavities is connected to two adjacent flow channels.

[0007] The first end cover includes a second cavity, the second cavity is blocked from the first cavity, the flow channel includes an outflow channel, the second cavity is communicated with the outflow channel, the first end cover is provided with a first connector, and the inner channel corresponding to the first connector is communicated with the second cavity;

[0008] Alternatively, the heating element includes a second end cover, the second end cover and the first end cover are respectively located at two ends of the metal substrate, the flow channel includes an outlet channel, the second end cover includes a third cavity connected to the outlet channel, the second end cover is provided with a second connector, and the inner channel corresponding to the second connector is connected to the third cavity.

[0009] The flow channel includes an inlet channel, the second end cover includes a fourth cavity connected to the inlet channel, the fourth cavity is blocked from the third cavity, the second end cover is provided with a third connector, and the inner channel corresponding to the third connector is connected to the fourth cavity.

[0010] The flow channel includes at least two transition channels, and the second end cover includes one or at least two fifth cavities, and any of the fifth cavities is correspondingly connected to two adjacent transition channels.

[0011] The number of the inlet channels is at least two, the number of the outlet channels is at least two, the inlet channels are connected through the first chamber, and the outlet channels are connected through the second chamber or the third chamber.

[0012] The metal substrate is flat as a whole, the flow channels are arrayed inside the metal substrate, and the flow channels are connected end to end in sequence; or, the metal substrate is prism-shaped or cylindrical as a whole, and the flow channels are arrayed inside the metal substrate.

[0013] The flow channel includes an inlet channel and a diversion channel. The first cavity connects the inlet channel and the diversion channel. The number of the diversion channels is at least two, and the diversion channels are distributed along the circumference of the inlet channel.

[0014] The heating element includes a second end cover, which is respectively located at two ends of the metal substrate with the first end cover, the second end cover has a sixth cavity connected to the diversion channel, and the second end cover is provided with a fourth connector, and the inner channel corresponding to the fourth connector is connected to the sixth cavity.

[0015] The metal substrate is welded to the first end cover as a whole, and / or at least two of the electrode layers are arranged in parallel along the direction of fluid movement in the flow channel, and / or at least two of the electrode layers are arranged in parallel along the length direction of the metal substrate, and / or the cross-section of the flow channel is polygonal, circular or cross-shaped, and / or the electric heating film layer is a nano electric heating film; and / or the metal substrate is made of aluminum, copper or alloy material.

[0016] The utility model proposes a heating element, which has the beneficial effect that: the device generates heat by energizing the electrode layer to make the electric heating film layer generate heat, and the heat is conducted to the fluid flowing through the flow channel through the metal substrate, thereby heating the fluid. A plurality of flow channels are connected and arranged through the first cavity, so the production cost of the device is reduced, which is conducive to realizing automated production, and this structure is conducive to reducing the volume of the heating component and saving space occupancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic cross-sectional structure diagram of a first embodiment of the metal substrate of the utility model;

[0018] Figure 2 This is a schematic cross-sectional structure diagram of a second embodiment of the metal substrate of the utility model;

[0019] Figure 3 This is a schematic cross-sectional structure diagram of a third embodiment of the metal substrate of the utility model;

[0020] Figure 4 This is a schematic cross-sectional structure diagram of a fourth embodiment of the metal substrate of the utility model;

[0021] Figure 5 It is a schematic diagram of the top view structure of the metal substrate of the utility model;

[0022] Figure 6 This is a schematic cross-sectional structure diagram of a fifth embodiment of the metal substrate of the utility model;

[0023] Figure 7 This is a schematic structural diagram of a first embodiment of the end cover and the metal substrate of the utility model;

[0024] Figure 8 This is a schematic structural diagram of a second embodiment of the end cover and the metal substrate of the utility model;

[0025] Fig. 9 This is a schematic structural diagram of a third embodiment of the end cover and the metal substrate of the utility model;

[0026] Fig.10 This is a schematic structural diagram of a fourth embodiment of the end cover and the metal substrate of the utility model;

[0027] Fig.11 It is a structural schematic diagram of the fifth embodiment of the end cover and the metal substrate of the utility model.

[0028] In the figure: metal substrate 1, flow channel 2, insulating layer 3, electric heating film layer 4, electrode layer 5, first end cover 6, flow channel opening 7, partition 8, first chamber 9, second end cover 10, third end cover 11, channel 12, second chamber 13, third chamber 14, first tube body 15, second tube body 16. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] refer to Figure 1-Figure 10 A heating element includes an integrally formed metal substrate 1 and a first end cover 6. The metal substrate 1 is fixed to the first end cover 6. The metal substrate 1 has at least two flow channels 2. The first end cover 6 has a first cavity 8 that at least connects the two flow channels. An electric heating film layer 4 is provided on the surface of the metal substrate 1. At least two electrode layers 5 are provided on the electric heating film layer 4.

[0031] refer to Figure 1 , Figure 7The device generates heat by energizing the electrode layer 5 to make the electric heating film layer 4 heat up, and the heat is conducted to the fluid flowing through the flow channel 2 through the metal substrate 1, thereby heating the fluid. The multiple flow channels are connected through the first cavity 8, and the production cost of the device is reduced, which is conducive to realizing automated production. In addition, this structure is conducive to reducing the volume of the heating component and saving space occupancy.

[0032] refer to Figure 8 At least two flow channels 2 are arranged adjacent to each other in sequence, there are at least two first cavities 8, and there is a barrier between two adjacent first cavities 8. Any first cavity 8 corresponds to connecting two adjacent flow channels 2. Multiple first cavities 8 arranged at intervals can realize the function of diverting the fluid in the flow channel 2, which is conducive to realizing the series and / or parallel arrangement of multiple flow channels 2.

[0033] refer to Figure 8 The first end cover 6 includes a second cavity 9, which is blocked from the first cavity 8. The flow channel includes an outflow channel 16, which is communicated with the second cavity 9. The first end cover 6 is provided with a first connector 13, and the inner channel corresponding to the first connector 13 is communicated with the second cavity 9. The fluid flows out through the outflow channel 16, the second cavity 9, and the first connector 13, so that the water inlet and the water outlet of the heating element are located on different sides of the metal substrate 1.

[0034] Or, refer to Fig. 9 The heating element includes a second end cover 7, and the second end cover 7 and the first end cover 6 are respectively located at the two ends of the metal substrate. The flow channel includes an outflow channel 16, and the second end cover 7 includes a third cavity 10 connected to the outflow channel 16. The second end cover 7 is provided with a second connector 14, and the inner channel corresponding to the second connector 14 is connected to the third cavity 10, so that the water inlet and water outlet of the heating element are located on the same side of the metal substrate 1.

[0035] refer to Figure 7 The flow channel includes an inlet channel 17, the second end cover 7 includes a fourth cavity 11 connected to the inlet channel 17, the fourth cavity 11 is blocked from the third cavity 10, the second end cover 7 is provided with a third connector 15, the inner channel corresponding to the third connector 15 is connected to the fourth cavity 11, the fluid enters the inlet channel 17 of the metal substrate 1 through the third connector 15 and the fourth cavity 11, and then flows out through the outlet channel 16.

[0036] refer to Figure 8 The flow channel includes at least two transition channels 18, and the second end cover 7 includes one or at least two fifth cavities 12. Any fifth cavity 12 corresponds to connecting two adjacent transition channels, and the fluid in the transition channel moves in the opposite direction.

[0037] refer to Fig.11There are at least two inlet channels 17 and at least two outlet channels 16. Each inlet channel 17 is connected via the first chamber 8, and each outlet channel 16 is connected via the second chamber 9 or the third chamber 10. Liquid is introduced into multiple inlet channels 17 at the same time, and liquid is discharged from multiple outlet channels 16 at the same time, thereby achieving a large-flow fluid heating effect.

[0038] refer to Figure 1-Figure 5 , the metal substrate is flat as a whole, the flow channels are arrayed inside the metal substrate, and the flow channels are connected end to end in sequence; or, refer to Figure 6 , Fig. 9 The metal substrate is in the shape of a prism or a cylinder as a whole, and the flow channel array is inside the metal substrate.

[0039] refer to Fig. 9 The flow channel includes an inlet channel 17 and a diverter channel 19. The first cavity 8 connects the inlet channel 17 and the diverter channel 19. There are at least two diverter channels 19. The diverter channels 19 are distributed along the circumference of the inlet channel 17. Multiple diverter channels 19 are distributed around the inlet channel 17. When the fluid enters, it can play a role in waste heat recovery.

[0040] As an implementation method, refer to Fig. 9 The heating element includes a second end cover 7, which is located at the two ends of the metal substrate with the first end cover 6 respectively. The second end cover 7 has a sixth cavity 20 connected to the diversion channel 19. The second end cover 7 is provided with a fourth connector 21. The inner channel corresponding to the fourth connector 21 is connected to the sixth cavity 20, and the fluid enters and is discharged on the same side of the metal substrate.

[0041] As an implementation method, refer to Figure 1-Figure 6 , the metal substrate is welded to the first end cap 6 as a whole, and / or at least two electrode layers 5 are arranged in parallel along the direction of fluid movement in the flow channel 2, and / or at least two electrode layers 5 are arranged in parallel along the length direction of the metal substrate 1, and / or the cross section of the flow channel 2 is polygonal, circular or cross-shaped, and / or the electric heating film layer 4 is a nano electric heating film, which has the advantages of high efficiency and energy saving; and / or the metal substrate 1 is made of aluminum, copper or alloy material, for example, aluminum profiles or other metals are stretched or die-cast into an integrated metal substrate. Due to the use of a metal substrate, the metal substrate can be connected to external equipment by welding, and the sealing performance is greatly improved, which is conducive to application in high-pressure fluid working environments.

[0042] The electric heating layer structure is arranged on the larger surface of the metal substrate 1 to improve the heating efficiency. For example, the electric heating layer structure can be arranged on both the upper and lower surfaces, or even on all the surrounding surfaces. Figure 1-Figure 3When the size of a single flow channel is small, several flow channels 2 are arranged along the length direction of the metal substrate 1, so that the flow channel 2 is as close to the electric heating film layer 4 as possible to increase the heat exchange effect. The device welds the first end cover at both ends of the metal substrate 1, which has good sealing performance and is suitable for high pressure fluid environment. Figure 6 , the cross section of the metal substrate 1 along the direction perpendicular to the fluid movement in the flow channel 2 is a pentagon, hexagon, heptagon, octagon or circle, and a plurality of flow channels 2 are arranged in a ring shape, and the specific shape of the metal substrate is set according to actual needs; for example, when the cross section of the metal substrate 1 is set to be circular, a plurality of electrode layers 5 are arranged in parallel along the direction of fluid movement in the flow channel 2, and the electrode layer 5 is set to be a circular ring structure. Along the direction perpendicular to the fluid movement in the flow channel 2, the cross section of the flow channel 2 is one of a triangle, a quadrilateral, a pentagon, a hexagon, a heptagon, an octagon, a five-pointed star, a circle, and a cross-shaped cross. The flow channels 2 of different shapes are set according to actual needs, and the above shapes can be stretched and formed, and the forming process is simple.

[0043] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technical solution, concept, and design obtained by equivalent replacement or change based on the technical solution and utility model concept of the utility model by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model.

Claims

1. A heating element, characterized in that: The invention comprises an integrally formed metal substrate (1) and a first end cover (6), wherein the metal substrate (1) is fixed to the first end cover (6), the metal substrate (1) has at least two flow channels (2), the first end cover (6) has a first cavity (8) which is connected to at least the two flow channels, and an electric heating film layer (4) is provided on the surface of the metal substrate (1), and at least two electrode layers (5) are provided on the electric heating film layer (4).

2. A heating element according to claim 1, characterized in that: At least two of the flow channels (2) are arranged adjacent to each other in sequence, there are at least two first chambers (8), two adjacent first chambers (8) are blocked, and any one of the first chambers (8) is connected to two adjacent flow channels (2).

3. A heating element according to claim 1 or 2, characterized in that: The first end cover (6) comprises a second cavity (9), the second cavity (9) is blocked from the first cavity (8), the flow channel comprises an outflow channel (16), the second cavity (9) is communicated with the outflow channel (16), the first end cover (6) is provided with a first connector (13), and the inner channel corresponding to the first connector (13) is communicated with the second cavity (9); Alternatively, the heating element comprises a second end cover (7), the second end cover (7) and the first end cover (6) are respectively located at two ends of the metal substrate, the flow channel comprises an outflow channel (16), the second end cover (7) comprises a third cavity (10) connected to the outflow channel (16), the second end cover (7) is provided with a second connector (14), and the inner channel corresponding to the second connector (14) is connected to the third cavity (10).

4. A heating element according to claim 3, characterized in that: The flow channel comprises an inlet channel (17), the second end cover (7) comprises a fourth chamber (11) connected to the inlet channel (17), the fourth chamber (11) is blocked from the third chamber (10), the second end cover (7) is provided with a third connector (15), and the inner channel corresponding to the third connector (15) is connected to the fourth chamber (11).

5. A heating element according to claim 4, characterized in that: The flow channel comprises at least two transition channels (18), and the second end cover (7) comprises one or at least two fifth cavities (12), and any one of the fifth cavities (12) is correspondingly connected to two adjacent transition channels.

6. A heating element according to claim 4, characterized in that: The number of the inlet channels (17) is at least two, the number of the outlet channels (16) is at least two, each of the inlet channels (17) is connected via the first chamber (8), and each of the outlet channels (16) is connected via the second chamber (9) or the third chamber (10).

7. A heating element according to claim 1 or 2 or 4 or 5 or 6, characterized in that: The metal substrate is flat as a whole, the flow channels are arrayed inside the metal substrate, and the flow channels are connected end to end in sequence; or, the metal substrate is prism-shaped or cylindrical as a whole, and the flow channels are arrayed inside the metal substrate.

8. A heating element according to claim 7, characterized in that: The flow channel comprises an inlet channel (17) and a diverter channel (19); the first chamber (8) communicates with the inlet channel (17) and the diverter channel (19); there are at least two diverter channels (19); and the diverter channels (19) are distributed along the circumference of the inlet channel (17).

9. A heating element according to claim 8, characterized in that: The heating element comprises a second end cover (7), wherein the second end cover (7) and the first end cover (6) are respectively located at two ends of the metal substrate, the second end cover (7) has a sixth cavity (20) connected to the diversion channel (19), and the second end cover (7) is provided with a fourth connector (21), and the inner channel corresponding to the fourth connector (21) is connected to the sixth cavity (20).

10. A heating element according to claim 1 or 2 or 4 or 5 or 6 or 8 or 9, characterized in that: The metal substrate and the first end cover (6) are welded together, and / or at least two of the electrode layers (5) are arranged in parallel along the direction of fluid movement in the flow channel (2), and / or at least two of the electrode layers (5) are arranged in parallel along the length direction of the metal substrate (1), and / or the cross-section of the flow channel (2) is polygonal, circular or cross-shaped, and / or the electric heating film layer (4) is a nano electric heating film; and / or the metal substrate (1) is made of aluminum, copper or alloy material.

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