A heating element for a heat pump of a new energy vehicle and a manufacturing method thereof

Abstract

This application relates to the technical field of heat pumps for new energy vehicles, and in particular, to a heating element for a heat pump of a new energy vehicle and a manufacturing method. The heating element includes: a body, the shape of the body is cylindrical; a heating assembly, including a heating resistance strip, an insulating dielectric bottom layer, an insulating and protective waterproof outer layer, a short-circuit conductor, and a power supply pad. The heating resistance strip is arranged in a circuitous and bent layout, and the turning segments in the heating resistance strip are short-circuited with the short-circuit conductor; a terminal seat, including a seat body and a conductive wire. This application can be applied in the heat pump of a new energy vehicle, facilitating the user to integrate the electronic water pump and the heating element into one, forming an integrated electronic water pump. The heating element adopts a setting method of combining a multi-layer insulating and protective waterproof outer layer with an insulating dielectric bottom layer. That is, in the case where the outer shell is omitted, both the inner and outer surfaces of the heating element can directly contact the fluid to be heated, which helps to improve the effect of heat exchange with the fluid, reduce heat loss, and thus improve the heating efficiency.

Description

Technical Field

[0001] This application relates to the technical field of heat pumps for new energy vehicles, and in particular to a heating element for a heat pump of a new energy vehicle and a manufacturing method thereof. Background Art

[0002] An electric water pump refers to an electric heat management system applied to new energy vehicles, so it is also called a heat pump. In new energy vehicles, since there is no heat generated by the engine of traditional fuel vehicles, the temperature inside the vehicle and the cabin temperature are relatively low in winter, and a dedicated heating element is required for heating. In addition, when the temperature drops below 0 degrees Celsius in winter, the battery efficiency of electric vehicles will also drop significantly. An efficient heating element is needed to heat the coolant, and the coolant forms a heating circuit within the battery unit to ensure that the battery temperature of electric vehicles or hybrid vehicles can be quickly raised to normal temperature and the temperature is evenly distributed, thereby improving the battery efficiency.

[0003] In existing new energy vehicles, its electric heat management system is composed of a coolant container, a heating element, an electric water pump, a pipeline circuit, a heat dissipation component, etc. Among them, the existing heating elements are mostly flat plates and are separate from the electric water pump. Moreover, the flat heating plate has single-sided heat conduction with the coolant. In order to prevent accidents caused by the contact between the live parts of the heating element and the fluid, such as electric shock when the live parts come into contact with water or coolant, the existing heating element uses a casing to protect its live parts, but this method has the disadvantage of low heating efficiency. Therefore, the above problems need to be solved urgently. Summary of the Invention

[0004] In order to optimize the structure of the existing heating element, this application provides a heating element for a heat pump of a new energy vehicle and a manufacturing method thereof. This application uses a cylindrical structure to replace the existing flat plate structure, with a small and compact shape, enabling the heating element to be integrated into the electric water pump, facilitating the user to integrate the electric water pump and the heating body into one. Moreover, the heating element adopts a multi-layer insulating and waterproof outer layer in combination with an insulating dielectric bottom layer, enabling both the inner and outer surfaces of the heating element to directly contact the fluid to be heated, which helps to improve the heat exchange effect with the fluid, reduce heat loss, and thus improve the heating efficiency.

[0005] In a first aspect, this application provides a heating element for a heat pump of a new energy vehicle, including:

[0006] A body, shaped like a cylinder;

[0007] Heating component, including a heating resistance strip, an insulating medium bottom layer, an insulating protection and waterproof outer layer, a short-circuit conductor and a power supply pad. The number of layers of the insulating medium bottom layer is multiple, and the number of layers of the insulating protection and waterproof outer layer is multiple. The multiple insulating medium bottom layers are sequentially stacked on the outer peripheral wall of the body. The heating resistance strip is arranged in a circuitous and bent layout. The turning segments of the circuitous bends in the heating resistance strip are short-circuited with the short-circuit conductor. The short-circuit conductor and the power supply pad are both located at the same level. The multiple insulating protection and waterproof outer layers are arranged in a sequentially stacked manner. The insulating medium bottom layer and the insulating medium outer layer cooperate to cover the heating resistance strip. The number of the power supply pads is two, and the two power supply pads are respectively correspondingly lapped with the two ends of the heating resistance strip. And the insulating protection and waterproof outer layer is provided with a hollow window for ensuring the outward exposure of the power supply pad;

[0008] Terminal block, including a seat body and a conducting wire. The seat body is connected to the body. The seat body covers the power supply pad. One end of the conducting wire is connected to the power supply pad. The conducting wire penetrates through the seat body, and the other end of the conducting wire penetrates downward through the seat body and extends out.

[0009] By adopting the above scheme, the present application can be used in the heat pump of a new energy vehicle. The heating element adopts the setting mode of the multiple insulating protection and waterproof outer layers cooperating with the insulating medium bottom layer. Even when the outer shell of the heating element is omitted, the inner and outer surfaces of the heating element can directly contact the fluid to be heated, which helps to improve the heat exchange effect with the fluid, reduce heat loss, and thus improve the heating efficiency. The power supply pad protrudes out of the insulating protection and waterproof outer layer to be outwardly exposed for connection with the conducting wire. The electric energy is transmitted to the heating resistance strip through the conducting wire connected to an external power supply, and the heating resistance strip converts the electric energy into heat energy by using the thermal effect. During this process, the seat body and the body are connected to cooperate to form a space that isolates the power supply pad, the conducting wire from the coolant, which helps to prevent electric leakage. The heating resistance strip is arranged in a circuitous and bent layout, and the turning segments of the circuitous bends in the heating resistance strip are short-circuited with the short-circuit conductor, reducing the overheating caused by current concentration at the turning segment position, which helps to make the heating more balanced. The overall structural cooperation improves the heating efficiency.

[0010] Optionally, the inner peripheral wall of the seat body is respectively recessed with a receiving position and a groove position. The depth of the receiving position is greater than the depth of the groove position, and the groove position is annularly arranged at intervals on the outer edge of the receiving position; the groove position accommodates a first waterproof ring. The surface of the first waterproof ring facing the body protrudes out of the groove position. The receiving position communicates with a through hole. The orientation of the through hole is parallel to the axial direction of the body. The conducting wire sequentially penetrates through the receiving position and the through hole, and the other end of the conducting wire penetrates downward through the through hole and extends out; a second waterproof ring is arranged on the outer edge of the through hole; the connection mode between the seat body and the outer peripheral wall of the body is a screw connection.

[0011] By adopting the above solution, the conductive wire can be inserted into the accommodation position, and then inserted into the through hole in the downward direction of the accommodation position. The other end of the conductive wire penetrates out from the through hole. The seat body can be installed and fixed on the outer peripheral wall of the body. The surface of the first waterproof ring facing the body is in extrusion contact with the body. Furthermore, the surface of the body, the first waterproof ring, and the inner wall of the accommodation position cooperate to enclose a space for isolating the coolant. Effectively prevent the coolant from entering the accommodation position and contacting the power pad and the conductive wire to cause electric leakage. The setting of the second waterproof ring helps to prevent the edge of the through hole from having a water leakage gap with the base of the electronic water pump in contact with it, and further helps to prevent the coolant from leaking out through the gap.

[0012] Optionally, the first waterproof ring is made of an elastic rubber waterproof ring or a silicone waterproof ring; the second waterproof ring is made of an elastic rubber waterproof ring or a silicone waterproof ring.

[0013] By adopting the above solution, the first waterproof ring and the second waterproof ring have a certain elasticity, which helps to prevent the generation of gaps during contact and improve the waterproof effect.

[0014] Optionally, the cross-sectional shape of the groove is annular, and a protrusion for abutting against the first waterproof ring protrudes from the inner side wall of the groove away from the accommodation position towards the center of the accommodation position.

[0015] By adopting the above solution, the setting of the groove facilitates the accommodation of the first waterproof ring, and the setting of the protrusion is used to produce an interference fit effect with the first waterproof ring.

[0016] Optionally, the seat body is recessed with an abutting position for the external bolt to penetrate through, the body is provided with a screw hole for screwing with the external bolt, the number of the abutting positions is the same as the number of the screw holes, and the positions of the abutting positions correspond to the positions of the screw holes one by one.

[0017] By adopting the above solution, the abutting position and the screw hole cooperate, which is convenient for the external bolt to penetrate through the abutting position and then screw with the screw hole, and the nut of the bolt abuts against the outer edge of the abutting position, so as to firmly install the seat body on the body.

[0018] Optionally, a positioning post protrudes from the inner peripheral wall of the seat body, and the body is provided with a positioning hole for the positioning post to be inserted and matched.

[0019] By adopting the above solution, when screwing and fixing the seat body on the outer peripheral wall of the body, the positioning post of the seat body can be first inserted into the positioning hole, which can reduce the situation that the seat body is driven to shift during screwing and is convenient for operation.

[0020] Optionally, the seat body is further provided with a first mounting hole, and the orientation of the first mounting hole is parallel to the axial direction of the body.

[0021] By adopting the above solution, an external bolt passes through the first mounting hole and is screwed and fixed to the base of an external electronic water pump, ensuring that the lower surface of the seat body and the base of the electronic water pump can be closely attached.

[0022] Optionally, a mounting member protrudes from the outer peripheral wall of the body. The mounting member is located at the lower end of the outer peripheral wall of the body, and the mounting member is connected to the body. The mounting member is provided with a second mounting hole.

[0023] By adopting the above solution, the mounting member and the second mounting hole help to stably mount the body on the base of the electronic water pump by screwing, limit the movement of the body, and achieve a positioning effect.

[0024] Optionally, the number of layers of the bottom layer of the insulating medium is 3 - 5 layers, and the number of layers of the outer insulating protection and waterproof layer is 3 - 5 layers.

[0025] In a second aspect, the present application further provides a manufacturing method for a heating element for a new energy vehicle heat pump according to any one of the above, including:

[0026] Cut a plate made of metal or alloy into strips of a specified size;

[0027] Roll the strip into a cylindrical shape, join the two ends of the strip in the axial direction by welding, then draw it into a tube strip of a specified length through a drawing process, and then process the tube strip through a laser cutting process and stamping to form the body;

[0028] Stack and print - sinter multiple layers of the bottom layer of the insulating medium on the outer peripheral wall of the body;

[0029] On the outer peripheral wall of one of the bottom layers of the insulating medium, a short - circuit conductor, two power supply pads, and a heating resistance strip are sequentially arranged. The short - circuit conductor and the two power supply pads are at the same level. The turning segments of the circuitous bend in the heating resistance strip are short - circuited with the short - circuit conductor. The number of power supply pads is two, and the two power supply pads are respectively lapped corresponding to the two ends of the heating resistance strip;

[0030] Stack and print - sinter multiple layers of the outer insulating protection and waterproof layer on the outer peripheral wall of the heating resistance strip. The outer insulating protection and waterproof layer is provided with a hollow window for ensuring the outward exposure of the power supply pads;

[0031] Connect one end of a conducting wire to the power supply pad. The conducting wire passes through the seat body, and the other end of the conducting wire penetrates downward through the seat body;

[0032] Connect the seat body to the body, so that the seat body covers the power supply pads.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. The present application uses a cylindrical structure to replace the existing flat structure, with a small and compact appearance, enabling the integration of the heating element into the electronic water pump, facilitating the user to combine the electronic water pump and the heating element into one integrated unit to form an integrated electronic water pump with a heating function, which is more convenient for the installation and use of end users.

[0035] 2. The present application can be used in the heat pump of a new energy vehicle. The heating element is provided with a multi-layer insulation protection waterproof outer layer and an insulating medium bottom layer. Even when the outer shell of the heating element is omitted, both sides of the heating element can directly contact the fluid to be heated, which helps to improve the heat exchange effect with the fluid, reduce heat loss, and thus improve the heating efficiency. The power supply pads protrude out of the insulation protection waterproof outer layer to be exposed outward for connection with the conducting wire. The conducting wire is connected to an external power supply to transmit electrical energy to the heating resistance strip, which converts electrical energy into heat energy using the thermal effect.

[0036] 2. The seat body and the main body are connected to form a space that isolates the power supply pads, the conducting wire, and the coolant, which helps to prevent electric leakage.

[0037] 3. The heating resistance strip is arranged in a circuitous and bent layout, and the turning segments of the circuitous and bent heating resistance strip are short-circuited with the short-circuit conductor, which helps to prevent overheating caused by current concentration at the turning segment positions and helps the heating to be more uniform. The overall structural cooperation improves the heating efficiency.

[0038] 4. A manufacturing method of a heating element for a heat pump of a new energy vehicle discloses a method of first setting the short-circuit conductor and then setting the heating resistance strip, which enables the heating resistance strip to reduce the number of sintering times, helps to prevent the heating resistance strip from being dry-fired, and helps to prevent the occurrence of scale formation caused by uneven heating of the heating resistance strip subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of a heating element for a heat pump of a new energy vehicle according to the present application.

[0040] Figure 2 It is a schematic diagram of the local layer sequence of the multi-layer insulating medium bottom layer, the heating resistance strip, the short-circuit conductor, and the multi-layer insulation protection waterproof outer layer of a heating element for a heat pump of a new energy vehicle according to the present application.

[0041] Figure 3 It is an unfolded schematic diagram of the main body of a heating element for a heat pump of a new energy vehicle according to the present application.

[0042] Figure 4The unfolding schematic diagram of a heating element for a heat pump of a new energy vehicle in this application, with the 4-layer insulating, protecting and waterproof outer layer of the body ignored.

[0043] Figure 5 The unfolding schematic diagram of a heating element for a heat pump of a new energy vehicle in this application, with the 4-layer insulating, protecting and waterproof outer layer and the heating resistance strips of the body ignored.

[0044] Figure 6 The exploded structural schematic diagram of a heating element for a heat pump of a new energy vehicle in this application.

[0045] Figure 7 The structural schematic diagram of a terminal block of a heating element for a heat pump of a new energy vehicle in this application.

[0046] Figure 8 The structural schematic diagram of a terminal block of a heating element for a heat pump of a new energy vehicle in this application from another angle.

[0047] Figure 9 The structural schematic diagram of a heating element for a heat pump of a new energy vehicle in this application, with the 4-layer insulating, protecting and waterproof outer layer of the body ignored.

[0048] Figure 10 The exploded structural schematic diagram of a heating element for a heat pump of a new energy vehicle in this application when applied to a heat pump of a new energy vehicle.

[0049] Figure 11 The step flow chart of the manufacturing method of a heating element for a heat pump of a new energy vehicle in this application.

[0050] Reference numerals: 1. Body; 2. Bottom insulating medium layer; 3. Heating resistance strip; 31. First horizontal sub-segment; 32. Second horizontal sub-segment; 33. Third horizontal sub-segment; 34. Fourth horizontal sub-segment; 35. Fifth horizontal sub-segment; 36. Sixth horizontal sub-segment; 37. Seventh horizontal sub-segment; 38. Eighth horizontal sub-segment; 39. First turning sub-segment; 310. Second turning sub-segment; 311. Third turning sub-segment; 312. Fourth turning sub-segment; 313. Fifth turning sub-segment; 314. Sixth turning sub-segment; 315. Seventh turning sub-segment; 316. Vertical extension sub-segment; 4. Short-circuit conductor; 5. Power supply pad; 6. Insulating, protecting and waterproof outer layer; 7. Terminal block; 71. Block body; 72. Conductive wire; 8. Accommodating position; 9. Slot position; 10. First waterproof ring; 11. Second waterproof ring; 12. Protrusion; 13. Abutting position; 14. Screw hole; 15. Positioning hole; 16. Positioning post; 17. First mounting hole; 18. Mounting member; 19. Second mounting hole; 20. Through hole; 21. Electronic water pump; 211. Base; 212. Wire passing hole; 22. Alignment strip. Detailed implementation manners

[0051] Next, in combination with the accompanying drawings and specific embodiments, the present application will be further described. It should be noted that, on the premise of non - conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0052] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance, nor can they be understood as specific quantities.

[0053] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0054] The present application provides a heating element for a heat pump of a new - energy vehicle. Referring to Figures 1-5 , including:

[0055] The body 1 is in a cylindrical shape; specifically, a circular - cylindrical shape. As another way, the shape of the body 1 can also be a square - cylindrical shape to be adapted and installed in the corresponding electronic water pump 21. Moreover, the body 1 can be prepared from stainless - steel material or aluminum material.

[0056] Heating component, for heat exchange with external fluid. The heating component includes a heating resistance strip 3, an insulating medium bottom layer 2, an insulating protection and waterproof outer layer 6, a short - circuit conductor 4 and a power supply pad 5. The number of layers of the insulating medium bottom layer 2 is multiple, and the number of layers of the insulating protection and waterproof outer layer 6 is multiple; The multiple insulating medium bottom layers 2 are successively stacked on the outer peripheral wall of the body 1, and the setting method can be coating printing. The heating resistance strip 3 is arranged in a circuitous and bent layout. The turning segments of the circuitous bends in the heating resistance strip 3 are short - circuited with the short - circuit conductor 4. The short - circuit specifically means that a short - circuit is formed through the short - circuit conductor 4 at each turning segment position. The short - circuit conductor 4 and the power supply pad 5 are both located at the same level. The same level means that the short - circuit conductor 4 and the power supply pad 5 are arranged at the same - layer position. The multiple insulating protection and waterproof outer layers 6 are arranged in successive superposition, and the setting method can be coating printing. The insulating medium bottom layer and the insulating medium outer layer cooperate to cover the heating resistance strip. The two power supply pads 5 are respectively lapped with the two ends of the heating resistance strip 3. Lapping refers to a kind of direct connection in the circuit. The insulating protection and waterproof outer layer 6 is provided with a hollow window to ensure that the power supply pad 5 is exposed to the outside;

[0057] Terminal block 7, for electrical connection with the heating component. The terminal block 7 includes a seat body 71 and a conducting wire 72. The seat body 71 is connected to the body 1, the seat body 71 covers the power supply pad 5, one end of the conducting wire 72 is connected to the power supply pad 5, the conducting wire 72 penetrates through the seat body 71, and the other end of the conducting wire 72 penetrates downward through the seat body 71 and extends out.

[0058] The heating element for a new - energy vehicle heat pump omits the structure of the outer shell. To solve the problem of electric leakage caused by the contact between live parts and fluid, this application proposes that the insulating medium bottom layer 2 and the insulating protection and waterproof outer layer 6 cooperate to cover the heating resistance strip 3 and the short - circuit conductor 4 to play the role of a waterproof area. Among them, the number of layers of the insulating medium bottom layer 2 can be 1 layer, 2 layers, 3 layers, 4 layers, 5 layers; The number of layers of the insulating protection and waterproof outer layer 6 can be 1 layer, 2 layers, 3 layers, 4 layers, 5 layers.

[0059] Looking back Figure 2 , taking 4 - layer insulating medium bottom layer 2 and 4 - layer insulating protection and waterproof outer layer 6 as an example, first, the insulating medium bottom layer 2 is successively stacked on the outer peripheral wall of the body 1, and then the short - circuit conductor 4 and the power supply pad 5 are arranged on the outermost insulating medium bottom layer 2 among the 4 layers. At this time, the short - circuit conductor 4 and the power supply pad 5 are both located at the same level.

[0060] Then, the heating resistance strip 3 is set. The short - circuit conductor 4 is located between the heating resistance strip 3 and the outermost insulating medium bottom layer 2 at this time, and the power supply pads 5 are respectively connected to the two ends of the heating resistance strip 3.

[0061] Next, the four-layer insulating, protective, and waterproof outer layer 6 is sequentially stacked. Among them, the insulating, protective, and waterproof outer layer 6 is provided with a hollow window to ensure that the power pad 5 is exposed outward to form a waterproof area.

[0062] The above can isolate the external coolant from the heating resistance strip 3 and the short-circuit conductor 4 respectively, preventing fluids such as coolant or water from penetrating into the heating resistance strip 3 and / or the short-circuit conductor 4, which helps to achieve the effect of waterproofing and preventing electric leakage. And through the stacking of layers, the waterproof performance is enhanced.

[0063] Specifically, both the insulating dielectric bottom layer 2 and the insulating, protective, and waterproof outer layer 6 can adopt nano-insulating waterproof coating materials. The nano-insulating waterproof coating material is made of nano-scale borosilicate glass powder, nano-scale ethyl cellulose, and an acetate butyl carbitol solvent-based solvent, and has the characteristics of insulation and waterproofing.

[0064] The proposed structure allows the heating element to directly contact the fluid to be heated on both the inner and outer sides of the heating element without an outer shell, which helps to improve the heat exchange effect with the fluid, reduce heat loss, and thus improve the heating efficiency. In addition, to help ensure the balance of energized heating, the applicant has improved and optimized the layout and current-carrying path of the heating resistance strip 3.

[0065] Among them, the heating resistance strip 3 is arranged in a circuitous and bent manner. Looking back Figure 3 and Figure 4 , specifically, it means that the heating resistance strip 3 includes transverse segments and turning segments. The transverse segments include the first transverse sub-segment 31, the second transverse sub-segment 32, the third transverse sub-segment 33, the fourth transverse sub-segment 34, the fifth transverse sub-segment 35, the sixth transverse sub-segment 36, the seventh transverse sub-segment 37, and the eighth transverse sub-segment 38;

[0066] The turning segments of the circuitous and bent heating resistance strip 3 are specifically the first turning sub-segment 39, the second turning sub-segment 310, the third turning sub-segment 311, the fourth turning sub-segment 312, the fifth turning sub-segment 313, the sixth turning sub-segment 314, and the seventh turning sub-segment 315.

[0067] The number of power pads 5 is two. One end of the first horizontal sub-segment 31 extends with a vertical extension sub-segment 316 for connecting to one of the power pads 5. A short-circuit conductor 4 is also closely attached to the connection point between the vertical extension sub-segment 316 and one end of the first horizontal sub-segment 31. The other end of the first horizontal sub-segment 31 is connected to one end of the first turning sub-segment 39. The first turning sub-segment 39 is vertically arranged. The other end of the first turning sub-segment 39 is connected to one end of the second horizontal sub-segment 32. The length of the first horizontal sub-segment 31 is greater than that of the second horizontal sub-segment 32. The other end of the second horizontal sub-segment 32 is connected to one end of the second turning sub-segment 310. The second turning sub-segment 310 is vertically arranged. The other end of the second turning sub-segment 310 is connected to one end of the third horizontal sub-segment 33. The length of the third horizontal sub-segment 33 is the same as that of the second horizontal sub-segment 32. The other end of the third horizontal sub-segment 33 is connected to one end of the third turning sub-segment 311. The third turning sub-segment 311 is arranged in multiple bends to avoid the screw hole 14. The other end of the third turning sub-segment 311 is connected to one end of the fourth horizontal sub-segment 34. The length of the third horizontal sub-segment 33 is greater than that of the fourth horizontal sub-segment 34. The other end of the fourth horizontal sub-segment 34 is connected to one end of the fourth turning sub-segment 312. The other end of the fourth turning sub-segment 312 is connected to one end of the fifth horizontal sub-segment 35. The length of the fourth horizontal sub-segment 34 is the same as that of the fifth horizontal sub-segment 35. The other end of the fifth horizontal sub-segment 35 is connected to one end of the fifth turning sub-segment 313. The fifth turning sub-segment 313 is vertically arranged. The other end of the fifth turning sub-segment 313 is connected to one end of the sixth horizontal sub-segment 36. The length of the sixth horizontal sub-segment 36 is greater than that of the fifth horizontal sub-segment 35 and less than that of the third horizontal sub-segment 33. The other end of the sixth horizontal sub-segment 36 is connected to one end of the sixth turning sub-segment 314. The sixth turning sub-segment 314 is vertically arranged. The other end of the sixth turning sub-segment 314 is connected to one end of the seventh horizontal sub-segment 37. The seventh horizontal sub-segment 37 and the fifth horizontal sub-segment 35 are on the same horizontal line. The seventh horizontal sub-segment 37 and the fifth horizontal sub-segment 35 are arranged at intervals. The other end of the seventh horizontal sub-segment 37 is connected to one end of the seventh turning sub-segment 315. The seventh turning sub-segment 315 is vertically arranged. The other end of the seventh turning sub-segment 315 is connected to one end of the eighth horizontal sub-segment 38. The eighth horizontal sub-segment 38 and the fourth risk sub-segment are on the same horizontal line. The eighth horizontal sub-segment 38 and the fourth horizontal sub-segment 34 are arranged at intervals. The other end of the eighth horizontal sub-segment 38 is connected to the other power pad 5. In this embodiment, looking back Figure 1 , the axial direction of the body 1 is vertical.

[0068] When an external power supply energizes the power supply pad 5 through the conductive wire 72, and then allows current to pass through the heating resistance strip 3 to form a thermal effect, thereby converting electrical energy into heat energy. Moreover, the above-mentioned circuitous bending layout helps the heating resistance strip 3 to fully cover the outer peripheral wall of the insulating medium bottom layer 2, which helps the outer peripheral wall of the body 1 to perform heat exchange with the external coolant at multiple positions.

[0069] Moreover, considering that the turning and segmentation of the heating resistance strip 3 result in a small turning bending radius and a large heating density at the turning position, the heating degree at this position is higher than that at other positions. After long-term use, due to the difference in the heating degree at different positions of the heating resistance strip 3, the turning segment with a relatively high heating temperature will scale, increasing the risk of damage to the heating resistance strip 3 and affecting the subsequent service life. Therefore, referring to Figure 4 and Figure 5 , in this application, the short-circuit conductor 4 is closely attached to the turning segment position of the heating resistance strip 3. Compared with the turning segment, the short-circuit conductor 4 has the effect of short-circuit electrical connection, which helps to prevent overheating caused by current concentration at the turning segment position, thereby solving the problem of heating uniformity at different positions of the heating resistance strip 3. It helps to prevent scaling and extend the service life. It realizes more balanced heating at each position of the heating component and improves the heating efficiency. It helps to prevent scaling and extend the service life. It realizes more balanced heating at each position of the heating component and improves the heating efficiency.

[0070] In order to enable the heating component to effectively perform its function and at the same time achieve the waterproof performance. Looking back at Figure 3 , this application proposes that the insulating protection and waterproof outer layer 6 is provided with a hollow window to ensure that the power supply pad 5 is exposed outward. The seat body 71 covers the power supply pad 5. One end of the conductive wire 72 is connected to the power supply pad 5, and then the conductive wire 72 penetrates out of the seat body 71. The connection method between the seat body 71 and the body 1 isolates the power supply pad 5 and the conductive wire 72 from the coolant located on the outer peripheral wall of the body 1, improving the waterproof performance of the power supply pad 5 and the conductive wire 72.

[0071] Furthermore, through structural improvement of the seat body 71, the conductive wire 72 and the power supply pad 5 can be effectively isolated from the coolant to achieve the waterproof effect. Among them, referring to Figures 6-8, the inner peripheral wall of the base 71 is respectively recessed with a receiving position 8 and a groove position 9. The depth of the receiving position 8 is greater than that of the groove position 9, and the groove position 9 is annularly arranged at intervals around the outer edge of the receiving position 8; a first waterproof ring 10 is accommodated in the groove position 9, and the surface of the first waterproof ring 10 facing the body 1 protrudes out of the groove position 9. The receiving position 8 communicates with a through hole 20, and the orientation of the through hole 20 is parallel to the axial direction of the body 1. The conductive wire 72 sequentially penetrates through the receiving position 8 and the through hole 20, and the other end of the conductive wire 72 penetrates downward through the through hole 20; a second waterproof ring 11 is provided at the outer edge of the through hole 20; the connection mode between the base 71 and the outer peripheral wall of the body 1 is screwed connection.

[0072] During specific use, the conductive wire 72 is inserted into the receiving position 8, and then inserted into the through hole 20 in the downward direction of the receiving position 8. The other end of the conductive wire 72 penetrates out of the through hole 20, so as to realize penetrating downward through the base 71.

[0073] Then, the base 71 is installed and fixed on the outer peripheral wall of the body 1. At this time, the surface of the first waterproof ring 10 facing the body 1 is in extrusion contact with the body 1. The first waterproof ring 10 can be an elastic rubber waterproof ring or a silicone waterproof ring. In this way, the surface of the body 1, the first waterproof ring 10, and the inner wall of the receiving position 8 cooperate to enclose a space for isolating the coolant. It effectively prevents the coolant from entering the receiving position 8 and contacting the power supply pad 5 and the conductive wire 72 to cause electric leakage. The setting of the second waterproof ring 11 helps to prevent the edge of the through hole 20 from having a water leakage gap with the base 211 of the electronic water pump 21 in contact therewith, and further helps to prevent the coolant from leaking outwards from the gap. The second waterproof ring 11 can be an elastic rubber waterproof ring or a silicone waterproof ring.

[0074] Further, looking back Figure 7 , the cross-sectional shape of the groove position 9 is annular, and a protrusion 12 for abutting against the first waterproof ring 10 protrudes from the inner side wall of the groove position 9 away from the receiving position 8 towards the center of the receiving position 8. Specifically, the number of the protrusions 12 is multiple, such as 4, 8, etc. Taking 4 protrusions 12 as an example, the 4 protrusions 12 are arranged at intervals on the inner side wall of the groove position 9 for tightly abutting against the first waterproof ring 10, and the extra space in the groove position 9 can be used to provide an avoidance space to hook out the first waterproof ring 10 from the groove position 9, which is convenient for replacing the first waterproof ring 10.

[0075] Further, looking back Figure 7 、 Figure 8 and referring to Figure 9, the seat body 71 is recessed with abutting positions 13 for the bolts from the outside to penetrate through, and the main body 1 is provided with threaded holes 14 for screwing with the bolts from the outside. The number of the abutting positions 13 is the same as that of the threaded holes 14, and the positions of the abutting positions 13 correspond to those of the threaded holes 14 one by one. The abutting positions 13 are respectively arranged on both sides of the seat body 71. Among them, two abutting positions 13 are arranged on the left side of the seat body 71, and one abutting position 13 is arranged on the right side of the seat body 71. The number of the threaded holes 14 of the main body 1 correspondingly is three. The cross-sectional shape of the abutting position 13 is a round-headed rectangle. The function of arranging the abutting position 13 is that when the seat body 71 is installed and fixed on the main body 1, the screw rod of the outside bolt penetrates through the abutting position 13 and is screwed and fixed with the threaded hole 14. The cross-sectional diameter of the nut of the bolt is larger than the vertical diameter of the cross-section of the round-headed rectangle. Thus, the nut of the bolt can abut against the outer edge of the abutting position 13, so as to play the role of pressing and fixing the seat body 71 on the outer peripheral wall of the main body 1 by the bolt, and achieve the effect of fixing the seat body 71 on the outer peripheral wall of the main body 1.

[0076] In this embodiment, looking back Figure 6 and Figure 9 , a positioning post 16 protrudes from the inner peripheral wall of the seat body 71, and the main body 1 is provided with a positioning hole 15 for the positioning post 16 to be inserted and matched. When the seat body 71 is screwed and fixed on the outer peripheral wall of the main body 1, the positioning post 16 of the seat body 71 can be first inserted into the positioning hole 15. In this way, the situation that the seat body 71 is driven to shift during screwing can be reduced, and thus it is not necessary to always hold the seat body 71 for screwing, which is convenient for operation.

[0077] In this embodiment, referring to Figure 10 , the seat body 71 is further provided with a first mounting hole 17, and the orientation of the first mounting hole 17 is parallel to the axial direction of the main body 1. In this way, a bolt can pass through the first mounting hole 17 and be screwed and fixed with the base 211 of the external electronic water pump 21, and the screwing and fixing ensures that the lower surface of the seat body 71 and the base 211 of the electronic water pump 21 can be closely attached. The through hole 20 is aligned with the wire passing hole 212 corresponding to the base 211 of the electronic water pump 21. The main body 1 is located on the upper surface of the base 211 of the electronic water pump 21, so that the coolant is isolated in the electronic water pump 21 by the housing and the base 211 of the electronic water pump 21. The conducting wire 72 sequentially penetrates through the accommodating position 8 and the through hole 20 and then is led out from the wire passing hole 212 to facilitate connecting to an external power supply.

[0078] Since the heating element for a new energy vehicle heat pump needs to be installed inside the electronic water pump 21 for use, during the installation process, the conventional heating element for a new energy vehicle heat pump is prone to displacement. Therefore, the outer peripheral wall of the body 1 protrudes with a mounting member 18. The mounting member 18 is located at the lower end of the outer peripheral wall of the body 1, and the mounting member 18 is connected to the body 1. The connection method can adopt laser welding. The mounting member 18 is provided with a second mounting hole 19. When installing the heating element for a new energy vehicle heat pump inside the electronic water pump 21 (the outer peripheral partition and the inner peripheral flow channel inside the electronic water pump 21 are not shown), the mounting member 18 aligns with the limit screw hole 14 correspondingly provided on the base 211 of the electronic water pump 21 through the second mounting hole 19. Then, after a bolt outside passes through the second mounting hole 19 and is screwed with the limit screw hole 14, it helps to stably install the body 1 on the base 211 of the electronic water pump 21, limits the movement of the body 1, and achieves a positioning effect. Specifically, the number of the mounting members 18 is multiple. Taking 3 mounting members 18 as an example, the 3 mounting members 18 are arranged at intervals at the lower end of the outer peripheral wall of the body 1 and are respectively screwed and limited at 3 positions on the base 211 of the electronic water pump 21. Further, the bottom of the outer peripheral wall of the body 1 is also provided with alignment strips 22 at intervals, which are used for alignment during installation.

[0079] Referring to Figure 11 , based on the above-mentioned heating element for a new energy vehicle heat pump, the present application also provides a manufacturing method for the heating element for a new energy vehicle heat pump, including the following steps:

[0080] S1. Cut a plate made of metal or alloy into strips of a specified size.

[0081] For example, the specified size of the strip is length multiplied by width multiplied by height: length: 250 mm - 300 mm, such as 251 mm, 257 mm, 264 mm, 279 mm, 289 mm, etc., width: 50 mm - 60 mm, such as 53 mm, 57 mm, 59 mm, etc., height: 2 mm - 4 mm, such as 2.1 mm, 2.4 mm, 3.6 mm, etc.

[0082] S2. Roll the strip into a cylindrical shape, and connect the two ends of the strip in the axial direction by welding, that is, the roll welding process; then draw it into a tube strip of a specified length through the drawing process, and then process the tube strip through the laser cutting process and stamping to make the body 1.

[0083] Among them, the drawing process is specifically to draw the roll-welded thick strip into a tube strip of 2 - 3 m. Laser cutting specifically refers to laser cutting the tube strip into short tubes of a specified size. Stamping specifically refers to punching out specified punching holes and positioning points through stamping, so as to shape the cylindrical form of the body 1. And after completing the above steps, the body 1 is annealed to reduce the stress after roll welding and make the body 1 not easily deformed.

[0084] S3. Multiple layers of insulating dielectric bottom layers 2 are superposed and printed and sintered on the outer peripheral wall of the body 1. The insulating dielectric bottom layer 2 is provided to isolate the body 1 from the heating resistance strip 3, which helps to prevent the body 1 from being charged during subsequent use. The number of layers of the insulating dielectric bottom layer 2 can be 4 layers.

[0085] S4. A short - circuit conductor 4, a power supply pad 5, and a heating resistance strip 3 are sequentially arranged on the outer peripheral wall of one of the insulating dielectric bottom layers 2. The short - circuit conductor 4 and the two power supply pads 5 are at the same level. The turning segments of the circuitous bend in the heating resistance strip 3 are short - circuited with the short - circuit conductor 4. The number of the power supply pads 5 is two, and the two power supply pads 5 are respectively connected to the two ends of the heating resistance strip 3 in a corresponding overlapping connection manner, which can be welding.

[0086] S5. Multiple layers of the insulating, protective, and waterproof outer layers 6 are superposed and printed and sintered again on the outer peripheral wall of the heating resistance strip 3. The insulating, protective, and waterproof outer layer 6 is provided with a hollow window for ensuring the exposure of the power supply pad 5 to the outside.

[0087] One of the insulating dielectric bottom layers 2 refers to the fourth insulating dielectric bottom layer 2 that is the outermost layer after the initial superposition, printing, and sintering in step S3, and the adjacent insulating, protective, and waterproof outer layer 6 refers to the first insulating, protective, and waterproof outer layer 6 that is the innermost layer after the re - superposition, printing, and sintering in step S5.

[0088] Moreover, the way realized by steps S3 - S4 is to set the short - circuit conductor 4 first and then the heating resistance strip 3. Such a way can reduce the number of sintering times of the heating resistance strip 3, which helps to prevent the change in resistance value and performance caused by the dry - burning of the heating resistance strip 3. Since the dry - burning of the heating resistance strip 3 may affect the subsequent heating effect of the heating resistance strip 3, the above - mentioned way helps to prevent the occurrence of scale formation caused by uneven heating of the heating resistance strip 3 subsequently. The insulating, protective, and waterproof outer layer is provided with a hollow window to ensure the exposure of the power supply pad 5 to the outside. Such a setting helps to prevent the solder from flowing along the direction of the power supply solder when welding the power supply pad 5.

[0089] S6. One end of the conducting wire 72 is connected to the power supply pad 5. The conducting wire 72 penetrates through the seat body 71, and the other end of the conducting wire 72 penetrates downward through the seat body 71 and extends out.

[0090] S7. The seat body 71 is connected to the body 1, so that the seat body 71 covers the power supply pad 5.

[0091] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A heating element for a heat pump in a new energy vehicle, characterized in that, include: The body (1) is cylindrical in shape; A heating component comprises a heating resistor strip (3), an insulating medium bottom layer (2), an insulating protective waterproof outer layer (6), a short-circuit conductor (4) and a power supply pad (5), wherein the insulating medium bottom layer (2) has multiple layers, the insulating protective waterproof outer layer (6) has multiple layers, the multiple layers of the insulating medium bottom layer (2) are sequentially stacked on the outer peripheral wall of the body (1), the heating resistor strip (3) is arranged in a circuitous bending layout, and the circuitous bending turning segments in the heating resistor strip (3) are short-circuited with the short-circuit conductor (4). , the short-circuit conductor (4) and the power pad (5) are both located at the same level, the multiple layers of the insulating protective waterproof outer layer (6) are stacked in sequence, the insulating medium bottom layer (2) and the insulating protective waterproof outer layer (6) cooperate to cover the heating resistor strip (3), the number of the power pads (5) is two, the two power pads (5) are respectively overlapped with the two ends of the heating resistor strip (3), and the insulating protective waterproof outer layer (6) is provided with a hollow window for ensuring that the power pad (5) is exposed to the outside; A terminal seat (7), comprising a seat body (71) and a conductive wire (72), wherein the seat body (71) is connected to the main body (1), the seat body (71) is covered on the power pad (5), one end of the conductive wire (72) is connected to the power pad (5), the conductive wire (72) passes through the seat body (71), and the other end of the conductive wire (72) passes through the seat body (71) downward and exits; A mounting member (18) protrudes from the outer peripheral wall of the body (1), the mounting member (18) is located at the lower end of the outer peripheral wall of the body (1), and the mounting member (18) is connected to the body (1), and the mounting member (18) is provided with a second mounting hole (19); The insulating medium bottom layer (2) has 3 to 5 layers, and the insulating protective waterproof outer layer (6) has 3 to 5 layers.

2. The heating element for a new energy vehicle heat pump according to claim 1, characterized in that, The inner peripheral wall of the seat body (71) is respectively recessed with a receiving position (8) and a groove (9), the depth of the receiving position (8) is greater than the depth of the groove (9), and the groove (9) is arranged at intervals around the outer edge of the receiving position (8); the groove (9) accommodates a first waterproof ring (10), and the surface of the first waterproof ring (10) facing the main body (1) protrudes out of the groove (9), the receiving position (8) is connected with a through hole (20), the direction of the through hole (20) is parallel to the axial direction of the main body (1), the conductive wire (72) passes through the receiving position (8) and the through hole (20) in sequence, and the other end of the conductive wire (72) passes through the through hole (20) downward and comes out; the outer edge of the through hole (20) is provided with a second waterproof ring (11); the seat body (71) and the outer peripheral wall of the main body (1) are connected by screw connection.

3. The heating element for a new energy vehicle heat pump according to claim 2, characterized in that, The first waterproof ring (10) is an elastic rubber waterproof ring or a silicone waterproof ring; the second waterproof ring (11) is an elastic rubber waterproof ring or a silicone waterproof ring.

4. The heating element for a new energy vehicle heat pump according to claim 2, characterized in that, The cross-sectional shape of the slot (9) is annular, and a protrusion (12) for abutting against the first waterproof ring (10) protrudes from the inner side wall of the slot (9) far from the accommodation position (8) towards the center of the accommodation position (8).

5. The heating element for a heat pump of a new energy vehicle according to claim 1, characterized in that, The seat body (71) is recessed with an abutting position (13) for allowing an external bolt to pass through, the main body (1) is provided with a threaded hole (14) for screwing with an external bolt, the number of the abutting positions (13) is the same as the number of the threaded holes (14), and the positions of the abutting positions (13) correspond to the positions of the threaded holes (14) one by one.

6. The heating element for a heat pump of a new energy vehicle according to claim 1, characterized in that, A positioning post (16) protrudes from the inner peripheral wall of the seat body (71), and the main body (1) is provided with a positioning hole (15) for fitting and inserting the positioning post (16).

7. The heating element for a heat pump of a new energy vehicle according to claim 1, characterized in that, The seat body (71) is further provided with a first mounting hole (17), and the orientation of the first mounting hole (17) is parallel to the axial direction of the main body (1).

8. A manufacturing method of a heating element for a heat pump of a new energy vehicle according to any one of claims 1-7, characterized in that, Including: Cutting a sheet made of metal or alloy into strips of a specified size; Rolling the strips into a tubular shape, connecting the two ends of the strips in the axial direction by welding, then pulling into a tube strip of a specified length through a drawing process, and then subjecting the tube strip to a laser cutting process and stamping to form the main body (1); Stacking and printing and sintering multiple layers of insulating dielectric bottom layers (2) on the outer peripheral wall of the main body (1); A short-circuit conductor (4), a power supply pad (5), and a heating resistance strip (3) are sequentially arranged on the outer peripheral wall of one of the insulating dielectric bottom layers (2). The short-circuit conductor (4) and the two power supply pads (5) are located at the same level. The turning segments of the heating resistance strip (3) that are bent in a roundabout manner are short-circuited with the short-circuit conductor (4). The number of the power supply pads (5) is two, and the two power supply pads (5) are respectively lapped corresponding to the two ends of the heating resistance strip (3); Stacking and printing and sintering multiple layers of the insulating protection and waterproof outer layers (6) again on the outer peripheral wall of the heating resistance strip (3). The insulating protection and waterproof outer layer (6) is provided with a hollow window for ensuring the external exposure of the power supply pad (5); Connecting one end of a conducting wire (72) to the power supply pad (5), the conducting wire (72) penetrates through the seat body (71), and the other end of the conducting wire (72) penetrates downward through the seat body (71) and extends out; Connecting the seat body (71) to the main body (1), so that the seat body (71) covers the power supply pad (5).

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