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

Abstract

This application relates to the technical field of new energy heat pumps, and particularly to a heater for a new energy vehicle heat pump and a manufacturing method. The heater includes: a heating component, which includes a base circular tube, an insulating medium bottom layer, an insulating medium outer layer, a heating resistor, a connecting wire, a power supply pad, and a plurality of short-circuit conductors. The heating resistor is composed of multiple connecting segments, and the multiple connecting segments are connected end to end in sequence to form a layout that winds and bends; a water channel housing is arranged on the periphery of the base circular tube. The inner peripheral wall of the water channel housing is arranged opposite to the outer peripheral wall of the base circular tube. A contact sealing ring is connected to the top end of the water channel housing, and a seal is provided at the bottom end of the water channel housing. This application is applied in the heat pump of a new energy vehicle, enabling both the inner peripheral wall of the base circular tube and the outer peripheral wall of the water channel housing to be in contact with the coolant for effective heat exchange, thereby improving the heating efficiency.

Description

Technical Field

[0001] This application relates to the technical field of new energy heat pumps, and particularly to a heater for a new energy vehicle heat pump and a manufacturing method thereof. Background Art

[0002] 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 to provide heat. In addition, when the outdoor temperature drops below 8 degrees Celsius in winter, the battery efficiency of electric vehicles will also drop significantly. An electro-thermal management system is needed to heat the coolant, and the heated coolant forms a heating circuit in 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 stably and evenly distributed, thereby improving the battery efficiency.

[0003] To address the above requirements, in existing new energy vehicles, the electro-thermal management system consists of a coolant container, a heater, an electric water pump, a pipeline circuit, a heat dissipation component, etc. Among them, existing heaters mostly use the method of flat plates and flexible film PTCs, and the heater and the electric water pump are separate. Moreover, the flat-plate heater has one-sided heat conduction with the coolant, and such a 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 improve the heating effect of existing heaters. This application provides a heater for a new energy vehicle heat pump and a manufacturing method thereof.

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

[0006] A heating component, including a base body circular tube, an insulating medium bottom layer, an insulating medium outer layer, a heating resistor, a connecting wire, a power supply pad, and a plurality of short-circuit conductors. The insulating medium bottom layer is disposed on the outer peripheral wall of the base body circular tube, the heating resistor is disposed on the outer surface of the insulating medium bottom layer, the insulating medium outer layer is disposed on the outer surface of the heating resistor, the insulating medium bottom layer and the insulating medium outer layer cooperate to cover the heating resistor. The heating resistor is composed of a plurality of connecting segments, and the plurality of connecting segments are connected end to end in sequence to form a layout of meandering bends. Some of the connecting segments are arranged along the axial direction of the base body circular tube. One short-circuit conductor is correspondingly and closely attached to one connecting segment arranged along the axial direction of the base body circular tube, and the short-circuit conductor is located between the corresponding connecting segment and the insulating medium bottom layer. The connecting wire is electrically connected to the heating resistor through the power supply pad, and one end of the connecting wire is electrically connected to the power supply pad;

[0007] The water channel housing is arranged on the periphery of the base circular tube. The inner peripheral wall of the water channel housing is oppositely arranged with the outer peripheral wall of the base circular tube. A contact sealing ring extends from the top end of the water channel housing towards the direction of its axis center. The top end of the base circular tube is connected to the bottom of the contact sealing ring. A sealing member is provided at the bottom end of the water channel housing, and the sealing member is respectively connected to the bottom end of the base circular tube and the bottom end of the water channel housing. The connecting wire penetrates through the water channel housing, and the other end of the connecting wire penetrates through the bottom of the water channel housing and extends out.

[0008] By adopting the above scheme, both the inner peripheral wall of the base circular tube and the outer peripheral wall of the water channel housing can be in contact with the coolant for effective heat exchange, improving the heating efficiency. The heating resistors are evenly distributed on the outer peripheral wall of the base circular tube in a layout of winding and bending. The heating resistors can convert electrical energy into heat energy, thus serving as a heat source to heat the fluid. There are parts where the heating resistors bend and turn in the winding and bending layout, and the density of this part is greater than that of other parts. Therefore, the heating degree of this part will be higher. Therefore, short-circuit conductors are closely attached to all connection segments arranged along the axial direction of the base circular tube. The short-circuit conductors short-circuit the connection segments, making the current flowing into the heating resistors more inclined to flow in the direction of the short-circuit conductors, ensuring uniform overall heating. And the short-circuit conductors are located between the corresponding connection segments and the bottom layer of the insulating medium. This position setting method realizes the sequence of first printing the bottom layer of the insulating medium on the outer peripheral wall of the base circular tube, then setting the short-circuit conductors, and then setting the heating resistors. It enables the heating resistor strips to reduce the number of sintering times. It helps to prevent the heating resistors from being burned out without load. It plays a protective role for the heating resistors. Furthermore, it ensures that the whole application has the effect of uniform heating, helps to reduce the generation of water scale, improves the heating speed of the fluid, and reduces power consumption.

[0009] Optionally, the specific manner in which the multiple connection segments are connected end to end in sequence to form a winding and bending layout is as follows: The number of the power pads is two, and the number of the connecting wires is the same as that of the power pads. One connecting wire is electrically connected to one power pad; the multiple connection segments include: more than one first connection segment and more than one second connection segment. The first connection segment is arranged along the circumferential direction of the base circular tube, and the second connection segment is arranged along the axial direction of the base circular tube. The first connection segment and the second connection segment are alternately connected, and the first connection segment and the second connection segment are integrally formed to constitute the heating resistor. One of the power pads is connected to the first connection segment at the head of the heating resistor, and the other power pad is connected to the first connection segment at the tail of the heating resistor.

[0010] By adopting the above solution, the present application can make full use of the outer peripheral wall area of the base circular tube for arranging the heating resistors, so that when the heating resistors are energized to generate heat, the uniformity of heat generation can be improved.

[0011] 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 layer of the insulating medium is more than 2 layers.

[0012] By adopting the above solution, the waterproof function is enhanced by increasing the number of layers.

[0013] Optionally, a positioning member extends outward from the bottom end of the outer peripheral wall of the water channel housing, and the positioning member is provided with a positioning hole.

[0014] By adopting the above solution, the positioning member helps to accurately position the water channel housing at the installation position of an external heat pump, reducing the occurrence of displacement. The positioning hole helps an external bolt to pass through the positioning hole and be screwed with the external heat pump, playing a role in stabilizing the position of the water channel housing.

[0015] Optionally, the sealing member adopts an annular sealing ring. A groove is formed by recessing the bottom end of the inner peripheral wall of the water channel housing. The annular sealing ring is arranged in the groove, and the annular sealing ring is respectively connected to the groove of the water channel housing and the bottom end of the base circular tube.

[0016] By adopting the above solution, the annular sealing ring can be closely attached to the groove, improving the waterproof performance.

[0017] Optionally, the water channel housing is arranged around the base circular tube in a way of die - casting or machining into a shell sleeve. The contact sealing ring, the water channel housing, the base circular tube and the sealing member enclose a containing space, and an insulating and heat - conductive material is filled in the containing space.

[0018] By adopting the above solution, filling the insulating and heat - conductive material into the containing space not only plays a waterproof role, but also helps to prevent the water channel housing from directly contacting the heating resistors, and the filled insulating and heat - conductive material helps to ensure that heat can be transmitted to the water channel housing.

[0019] Optionally, a containing block extends integrally outward from the outer peripheral wall of the water channel housing. A containing cavity is arranged in the containing block. The cross - sectional shape of the containing cavity is bent downward. The containing cavity is communicated with the containing space. One end of the connecting wire is electrically connected to the power supply pad. The connecting wire passes through the containing cavity, and the other end of the connecting wire passes out through the bottom of the containing block.

[0020] By adopting the above solution, the containing block provides space for the connecting wire through the containing cavity, and on the premise of ensuring the waterproof effect, the connecting wire can pass out through the bottom of the containing block for electrical connection with an external power supply.

[0021] Optionally, the water channel housing is arranged around the matrix circular tube by injection molding. The contact sealing ring is integrally formed at the top end of the water channel housing by injection, and the sealing member is integrally connected to the bottom end of the water channel housing by injection.

[0022] By adopting the above scheme, the injection molding method helps to improve the effect of the contact sealing ring, the water channel housing and the sealing member in cooperatively enclosing the heating resistor, the power supply pad and the short - circuit conductor.

[0023] Optionally, a plurality of spiral water channels extend outward from the outer peripheral wall of the water channel housing, and the plurality of spiral water channels are arranged at equal intervals.

[0024] By adopting the above scheme, the spiral water channels help to extend the path length of the fluid on the surface of the housing, facilitating the fluid to be fully heated and quickly reach the required temperature.

[0025] In a second aspect, the present application also provides a manufacturing method for a heater used in a new - energy vehicle heat pump, including:

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

[0027] Rolling the strips into a cylindrical shape, joining the two ends of the strips in the axial direction by welding, then drawing the welded strips into a tube of a specified length through a drawing process, and then manufacturing the tube into a matrix circular tube through a laser cutting process;

[0028] Providing more than one insulating dielectric bottom layer on the outer peripheral wall of the matrix circular tube;

[0029] Arranging the short - circuit conductor and the power supply pad on the outer peripheral wall of the insulating dielectric bottom layer;

[0030] Providing a heating resistor on the outer peripheral wall of the insulating dielectric bottom layer. The heating resistor is composed of a plurality of connecting segments, and the plurality of connecting segments are connected end to end in sequence to form a layout of circuitous bends. Some of the connecting segments are arranged along the axial direction of the matrix circular tube. One short - circuit conductor is correspondingly closely attached to one connecting segment arranged along the axial direction of the matrix circular tube, and the short - circuit conductor is located between the corresponding connecting segment and the insulating dielectric bottom layer;

[0031] Providing an insulating dielectric outer layer on the outer surface of the heating resistor, and the insulating dielectric bottom layer and the insulating dielectric outer layer cooperate to wrap the heating resistor;

[0032] The water channel housing is arranged around the base circular tube. The connecting wire is electrically connected to the heating resistor through the power pad. One end of the connecting wire is electrically connected to the power pad. The connecting wire penetrates through the water channel housing, and the other end of the connecting wire penetrates through the bottom of the water channel housing and extends out.

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

[0034] 1. In the present application, both the inner peripheral wall of the base circular tube and the outer peripheral wall of the water channel housing can be in contact with the coolant for effective heat exchange, improving the heating efficiency. The heating resistors are uniformly distributed on the outer peripheral wall of the base circular tube in a meandering layout. The heating resistors can convert electrical energy into heat energy, thus serving as a heat source to heat the fluid. There are parts where the meandering layout of the heating resistors bends and turns, and the density of this part is relatively larger than that of other parts. Therefore, the heating degree of this part will be higher. Therefore, short-circuit conductors are closely attached to all connection segments arranged along the axial direction of the base circular tube. The short-circuit conductors short-circuit the connection segments, making the current flowing into the heating resistors more inclined to flow in the direction of the short-circuit conductors, ensuring uniform overall heating. Moreover, the short-circuit conductors are located between the corresponding connection segments and the bottom layer of the insulating medium. Such a position setting method realizes the sequence of first printing the bottom layer of the insulating medium on the outer peripheral wall of the base circular tube, then setting the short-circuit conductors, and then setting the heating resistors. It enables the heating resistor strips to reduce the number of sintering times. It helps prevent the heating resistors from being dry-fired. It plays a protective role for the heating resistors. Furthermore, it ensures that the whole of the present application has the effect of uniform heating, helps reduce the generation of water scale, improves the speed of heating the fluid, and reduces power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of a heater for a new energy vehicle heat pump according to the present application.

[0036] Figure 2 It is a schematic structural diagram of another angle of the heater for a new energy vehicle heat pump according to the present application.

[0037] Figure 3 It is an exploded structural diagram of the heater for a new energy vehicle heat pump according to the present application.

[0038] Figure 4 It is a schematic structural diagram of the heating resistor when the base circular tube of the heater for a new energy vehicle heat pump according to the present application is unfolded.

[0039] Figure 5 It is a schematic structural diagram of the short-circuit conductor when the base circular tube of the heater for a new energy vehicle heat pump according to the present application is unfolded.

[0040] Figure 6It is a flowchart of the steps for the manufacturing method of a heater for a new energy vehicle heat pump described in this application.

[0041] Figure 7 It is a schematic explosion structure diagram of the heater for a new energy vehicle heat pump described in this application when applied to a heat pump.

[0042] Reference numerals: 1, matrix circular tube; 2, water channel housing; 3, contact sealing ring; 4, seal; 5, heating resistor; 6, bottom layer of insulating medium; 7, connecting wire; 8, power supply pad; 9, short - circuit conductor; 10, positioning member; 11, positioning hole; 12, slot; 13, accommodating block; 14, spiral water channel; 15, extension section; 16, first connecting subsection; 17, second connecting subsection; 18, first sub - spiral water channel; 19, second sub - spiral water channel; 20, heat pump; 21, outer layer of insulating medium. Detailed implementation manners

[0043] Next, in combination with the attached Figures 1-7 And the detailed implementation manners, a further description of this application will be given. It should be noted that, on the premise of no conflict, any combination of the following - described embodiments or technical features can form a new embodiment.

[0044] In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing this 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 cannot be understood as a limitation of this 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.

[0045] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "install", "connect", and "join" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in this application can be understood according to specific situations.

[0046] This application provides a heater for a new energy vehicle heat pump, which is arranged in the heat pump 20 and can be applied in fields such as new energy vehicles and air conditioners to realize the function of heating flowing liquids such as water or coolant.

[0047] Refer toFigure 1 and Figure 2 The heater includes: a heating component, which includes a base circular tube 1, an insulating medium bottom layer 6, an insulating medium outer layer 21, a heating resistor 5, a connecting wire 7, a power supply pad 8, and a plurality of short - circuit conductors 9. The base circular tube 1 can also be of other shapes, such as a square tube shape, so as to be adapted to the external heat pump 20. The base circular tube 1 can be made of stainless steel. The insulating medium bottom layer 6 is arranged on the outer peripheral wall of the base circular tube 1, the heating resistor 5 is arranged on the outer surface of the insulating medium bottom layer 6, the insulating medium outer layer 21 is arranged on the outer surface of the heating resistor 5, and the insulating medium bottom layer 6 and the insulating medium outer layer 21 cooperate to wrap the heating resistor 5. The heating resistor 5 is composed of a plurality of connecting segments, and the plurality of connecting segments are connected end - to - end in sequence to form a circuitous and bent layout. Some connecting segments are arranged along the axial direction of the base circular tube 1. A short - circuit conductor 9 correspondingly abuts closely against a connecting segment arranged along the axial direction of the base circular tube 1, and the short - circuit conductor 9 is located between the corresponding connecting segment and the insulating medium bottom layer 6. The connecting wire 7 is electrically connected to the heating resistor 5 through the power supply pad 8. One end of the connecting wire 7 is electrically connected to the power supply pad 8; a water - channel housing 2 is arranged outside the base circular tube 1. The inner peripheral wall of the water - channel housing 2 is arranged opposite to the outer peripheral wall of the base circular tube 1. A contact sealing ring 3 extends integrally from the top end of the water - channel housing 2 towards the direction of its axis center. The top end of the base circular tube 1 is connected to the bottom of the contact sealing ring 3. A sealing member 4 is arranged at the bottom end of the water - channel housing 2. The sealing member 4 is respectively connected to the bottom end of the base circular tube 1 and the bottom end of the water - channel housing 2. The connecting wire 7 penetrates through the water - channel housing 2, and the other end of the connecting wire 7 penetrates through the bottom of the water - channel housing 2 and extends out

[0048] In this application, by tightly abutting the top end of the base circular tube 1 against the bottom of the contact sealing ring 3 and tightly abutting the bottom end of the base circular tube 1 against the sealing member 4, it can be ensured that the outer peripheral wall of the base circular tube 1 does not come into contact with the fluid, which helps to prevent the heating component located on the outer peripheral wall of the base circular tube 1 from short - circuiting. The tight abutting can be welding or bonding. Moreover, only the inner peripheral wall of the base circular tube 1 comes into contact with the coolant to achieve effective heat exchange

[0049] Among them, the short - circuit conductor 9 is connected to the outer peripheral wall of the base circular tube 1 by welding, and the short - circuit conductor 9 is used to play the role of short - circuiting. In this application, the heating resistor 5 and the short - circuit conductor 9 cooperate with each other to make the heating more uniform, which helps to reduce the generation of scale. Specifically, the heating resistor 5 is evenly distributed on the outer peripheral wall of the base circular tube 1 in a circuitous and bent layout. When the connecting wire 7 is connected to external electric energy, the electric energy is transmitted to the heating resistor 5 through the connecting wire 7 and the power supply pad 8. The heating resistor 5 can convert the electric energy into heat energy, thus serving as a heat source to heat the fluid. Combining with the advantages of the circuitous and bent layout helps the heating resistor 5 to fully heat the outside, improving the heating speed

[0050] Referring to Figure 4 and Figure 5 Since the heating resistors 5 are arranged in a circuitous and bent layout, and each turning angle in the heating resistors 5 reaches 90°, the density of this part is greater than that of other parts, and thus the heating degree of this part will be higher. In order to prevent the problem of uneven overall heating of the channel heating element, short-circuit conductors 9 are closely attached to all connection segments arranged along the axial direction of the base circular tube 1. With this setting, the resistance value of the short-circuit conductor 9 is extremely smaller than the resistance value of this connection segment, which is equivalent to short-circuiting this connection segment, making the current flowing into the heating resistors 5 more inclined to flow in the direction of the short-circuit conductor 9, ensuring uniform overall heating, thereby helping to prevent the situation where scale forms in the relatively high-temperature parts due to uneven heating, and further reducing the power consumption during use.

[0051] Moreover, the short-circuit conductor 9 is located between the corresponding connection segment and the bottom layer 6 of the insulating medium. With this setting, due to the sequence of first setting the short-circuit conductor 9 and then setting the heating resistors 5, and following this sequence, it is possible to first print the bottom layer 6 of the insulating medium on the outer peripheral wall of the base circular tube 1, then set the short-circuit conductor 9. The short-circuit conductor 9 can be set by welding, and after the short-circuit conductor 9 is set, it needs to be dried. After drying, the heating resistors 5 are set, achieving the effect of reducing the number of sintering times of the heating resistors 5. It helps to prevent the heating resistors 5 from being idly burned, plays a protective role for the heating resistors 5, and further ensures the effect of uniform heating of the heating resistors 5.

[0052] In this embodiment, looking back at Figure 4 and Figure 5 The circuitous and bent layout formed by connecting multiple connection segments end to end in sequence in this application is specifically as follows: The number of power pads 8 is two, the number of connecting wires 7 is the same as the number of power pads 8, and one connecting wire 7 is electrically connected to one power pad 8; the multiple connection segments include: more than one first connection segment 16 and more than one second connection segment 17. The first connection segment 16 is arranged along the circumferential direction of the base circular tube 1, the second connection segment 17 is arranged along the axial direction of the base circular tube 1, the first connection segment 16 and the second connection segment 17 are alternately connected, and the first connection segment 16 and the second connection segment 17 are integrally formed to constitute the heating resistors 5; one of the power pads 8 is connected to the first connection segment 16 at the head of the heating resistors 5, and the other power pad 8 is connected to the first connection segment 16 at the tail of the heating resistors 5.

[0053] Further, at the head of the heating resistors 5

[0054] The corner part of the first connection segment 16 extends with an extension segment 15, and a conductive member is closely attached at the corner. The conductive member is located between the corner part and the insulating dielectric bottom layer 6. One power supply pad 8 is connected to the first connection segment 16 at the head of the heating resistor 5 through the extension segment 15, and the other power supply pad 8 is connected to the first connection segment 16 at the tail of the heating resistor 5.

[0055] Specifically, the number of the first connection segments 16 is eight, and the number of the second connection segments 17 is seven.

[0056] Looking back Figure 4The first first connection segment 16 is the first segment of the heating resistor 5, wherein one of the power supply pads 8 is connected to one end of the first first connection segment 16 through the extension segment 15, the first first connection segment 16 is horizontally arranged, the other end of the first first connection segment 16 is connected to one end of the first second connection segment 17, the first second connection segment 17 is vertically arranged, the other end of the first second connection segment 17 is connected to one end of the second first connection segment 16, the second first connection segment 16 is horizontally arranged, the other end of the second first connection segment 16 is connected to one end of the second second connection segment 17, the first The two second connection segments 17 are arranged vertically, the other end of the second second connection segment 17 is connected to one end of the third first connection segment 16, the third first connection segment 16 is arranged horizontally, the other end of the third first connection segment 16 is connected to one end of the third second connection segment 17, the third second connection segment 17 is arranged vertically and in a bent and evasive state, the other end of the third second connection segment 17 is connected to one end of the fourth first connection segment 16, the fourth first connection segment 16 is arranged horizontally, the other end of the fourth first connection segment 16 is connected to one end of the fourth second connection segment 17 The fourth second connecting segment 17 is vertically arranged, and the other end of the fourth second connecting segment 17 is connected to one end of the fifth first connecting segment 16. The fifth first connecting segment 16 is horizontally arranged, and the other end of the fifth first connecting segment 16 is connected to one end of the fifth second connecting segment 17. The fifth second connecting segment 17 is vertically arranged, and the other end of the fifth second connecting segment 17 is connected to one end of the sixth first connecting segment 16. The sixth first connecting segment 16 is horizontally arranged, and the other end of the sixth first connecting segment 16 is connected to one end of the sixth second connecting segment 17. The connecting segment 17 is vertically arranged, the other end of the sixth second connecting segment 17 is connected to one end of the seventh first connecting segment 16, the seventh first connecting segment 16 is horizontally arranged, the other end of the seventh first connecting segment 16 is connected to one end of the seventh second connecting segment 17, the seventh second connecting segment 17 is vertically arranged, the other end of the seventh second connecting segment 17 is connected to one end of the eighth first connecting segment 16, the eighth first connecting segment 16 is horizontally arranged, the eighth first connecting segment 16 is the tail segment of the heating resistor 5, and the other end of the eighth first connecting segment 16 is connected to another power supply pad 8.

[0057] The length of the first first connection segment 16 is greater than that of the second first connection segment 16. The length of the second first connection segment 16 is equal to that of the third first connection segment 16. The length of the third first connection segment 16 is greater than that of the fourth first connection segment 16. The length of the fourth first connection segment 16 is the same as that of the fifth first connection segment 16. The lengths of the fifth first connection segment 16 and the seventh first connection segment 16 are both less than that of the sixth first connection segment 16. The length of the eighth first connection segment 16 is greater than that of the seventh first connection segment 16.

[0058] Both the fourth first connection segment 16 and the eighth first connection segment 16 are located on the same horizontal line. Both the fifth first connection segment 16 and the seventh first connection segment 16 are located on the same horizontal line.

[0059] In this embodiment, the number of the bottom insulating media layers 6 is 3 - 5 layers, and the number of the outer insulating media layers 21 is more than 2 layers. Both the bottom insulating media layer 6 and the outer insulating media layer 21 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 butyl carbitol acetate solvent-based solvent, and has the characteristics of insulation and waterproofing.

[0060] The bottom insulating media layer 6 and the outer insulating media layer 21 cooperate to form an insulating and waterproof surface body that can surround the above-mentioned energized fittings, strengthening the waterproof effect. The power pad 8 protrudes from the insulating and waterproof surface body for electrically connecting with the connecting wire 7, allowing the connecting wire 7 to pass through the bottom of the water channel housing 2 to connect to an external power supply.

[0061] Look back Figure 2 and refer to Figure 3 In this embodiment, at the bottom end of the outer peripheral wall of the water channel housing 2, a positioning member 10 extends outward, and the positioning member 10 is provided with a positioning hole 11.

[0062] Among them, the connection method between the positioning member 10 and the water channel housing 2 can be welding. Or the positioning member 10 and the water channel housing 2 are integrally formed. Setting the positioning member 10 helps to accurately position the water channel housing 2 at the installation position of the external heat pump 20 and reduce the occurrence of displacement. Setting the positioning hole 11 helps the external bolt to pass through the positioning hole 11 and then be screwed with the external heat pump 20, playing a role in stabilizing the position of the water channel housing 2.

[0063] Look back Figure 3, in this embodiment, the seal 4 is an annular sealing ring. A slot 12 is formed by recessing the bottom end of the inner peripheral wall of the water channel housing 2. The annular sealing ring is disposed in the slot 12 and is connected to the slot 12 of the water channel housing 2 and the bottom end of the base circular tube 1 respectively. The annular sealing ring can be closely attached to the slot 12 to improve the waterproof performance.

[0064] In addition, the water channel housing 2 is arranged around the base circular tube 1 in a manner of die-casting or machining into a shell sleeve. The contact sealing ring 3, the water channel housing 2, the base circular tube 1 and the seal 4 enclose a containing space, and the containing space is filled with an insulating and heat-conducting material.

[0065] Specifically, when the water channel housing 2 is a finished shell made of lithium metal. At this time, in order to avoid the water channel housing 2 contacting the heating resistor 5 as much as possible, by filling the containing space with an insulating and heat-conducting material, it not only plays a waterproof role, but also helps to prevent the water channel housing 2 from directly contacting the heating resistor 5, and the filled insulating and heat-conducting material helps to ensure that heat can be transmitted to the water channel housing 2. The insulating and heat-conducting material can be silicone grease.

[0066] In this embodiment, a containing block 13 extends integrally outward from the outer peripheral wall of the water channel housing 2. A containing cavity is provided in the containing block 13. The cross-sectional shape of the containing cavity is bent downward. The containing cavity is communicated with the containing space. One end of the connecting wire 7 is electrically connected to the power supply pad 8. The connecting wire 7 passes through the containing cavity, and the other end of the connecting wire 7 passes through the bottom of the containing block 13 and extends out.

[0067] With this setting, the containing block 13 provides space for the connecting wire 7 through the containing cavity, and on the premise of ensuring the waterproof effect, the connecting wire 7 can pass through the bottom of the containing block 13 and extend out for electrical connection with an external power supply.

[0068] As another implementation manner, the water channel housing 2 is arranged around the base circular tube 1 by injection molding. Specifically, after the plastic is melted by an injection molding machine, the plastic is closely attached to the periphery of the base circular tube 1, and the plastic is molded to form the water channel housing 2.

[0069] The contact sealing ring 3 is integrally formed at the top end of the water channel housing 2 by injection molding, and the seal 4 is integrally connected to the bottom end of the water channel housing 2 by injection molding. Such implementation helps to improve the effect of the contact sealing ring 3, the water channel housing 2 and the seal 4 in cooperating to enclose the heating component.

[0070] Look back Figure 3In this embodiment, a plurality of spiral water channels 14 extend outward from the outer peripheral wall of the water channel housing 2, and the plurality of spiral water channels 14 are arranged at equal intervals. Specifically, the spiral water channel 14 includes more than one first sub-spiral water channel 18 and more than one second sub-spiral water channel 19. The first sub-spiral water channel 18 and the second sub-spiral water channel 19 are alternately and equidistantly arranged on the outer peripheral wall of the water channel housing 2, and the second sub-spiral water channel 19 is provided with an opening. Such a setting is to cooperate with the components and structures of a conventional heat pump 20, which helps to extend the path length of the fluid on the surface of the housing. It is convenient to fully heat the fluid and quickly reach the required temperature.

[0071] Referring to Figure 6 , the present application also provides a manufacturing method of a heater for a new energy vehicle heat pump, including

[0072] S1. Cut a plate made of metal or alloy into slats with specified dimensions. The specified dimensions of the slats are length multiplied by width multiplied by height: length: 248 mm - 310 mm, such as 251 mm, 257 mm, 264 mm, 279 mm, 289 mm, etc., width: 47 mm - 63 mm, such as 53 mm, 57 mm, 59 mm, etc., height: 1.8 mm - 4.5 mm, such as 2.1 mm, 2.4 mm, 3.6 mm, etc.

[0073] S2. Roll the slats into a cylindrical shape, connect the two ends of the slats in the axial direction by welding, then draw them into a tube strip with a specified length through a drawing process, and then make the tube strip into a base circular tube 1 through a laser cutting process.

[0074] S3. Set more than one layer of insulating medium bottom layer 6 on the outer peripheral wall of the base circular tube 1.

[0075] S4. Set the short-circuit conductor 9 and the power supply pad 8 on the outer peripheral wall of the insulating medium bottom layer 6.

[0076] S5. Set the heating resistor 5 on the outer peripheral wall of the insulating medium bottom layer. The heating resistor 5 is composed of a plurality of connecting segments, and is formed into a layout of meandering bends in a way that the plurality of connecting segments are connected end to end in sequence. Some connecting segments are arranged along the axial direction of the base circular tube 1. One short-circuit conductor 9 correspondingly adheres to one connecting segment arranged along the axial direction of the base circular tube 1, and the short-circuit conductor 9 is located between the corresponding connecting segment and the insulating medium bottom layer 6.

[0077] S6. Set the insulating medium outer layer 21 on the outer surface of the heating resistor 5. The insulating medium bottom layer 6 and the insulating medium outer layer 21 cooperate to cover the heating resistor 5.

[0078] S7. Set the water channel housing 2 around the base circular tube 1, and electrically connect the connecting wire 7 to the heating resistor 5 through the power supply pad 8. One end of the connecting wire 7 is electrically connected to the power supply pad 8. The connecting wire 7 penetrates through the water channel housing 2, and the other end of the connecting wire 7 penetrates through the bottom of the water channel housing 2 and extends out. The way of setting the water channel housing 2 around the base circular tube 1 can be injection molding or using a formed shell sleeve to facilitate the subsequent installation of the heater in a new energy vehicle heat pump, such as Figure 7 as shown

[0079] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; 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 recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A heater for a heat pump of a new energy vehicle, characterized in that, Including: A heating component, comprising a base circular tube (1), an insulating medium bottom layer (6), an insulating medium outer layer (21), a heating resistor (5), a connecting wire (7), a power supply pad (8), and a plurality of short - circuit conductors (9). The insulating medium bottom layer (6) is disposed on the outer peripheral wall of the base circular tube (1). The heating resistor (5) is disposed on the outer surface of the insulating medium bottom layer (6). The insulating medium outer layer (21) is disposed on the outer surface of the heating resistor (5). The insulating medium bottom layer (6) and the insulating medium outer layer (21) cooperate to cover the heating resistor (5). The heating resistor (5) is composed of a plurality of connecting segments, and the plurality of connecting segments are connected end - to - end in sequence to form a circuitous and bent layout. Some of the connecting segments are arranged along the axial direction of the base circular tube (1). One short - circuit conductor (9) is correspondingly and closely attached to one of the connecting segments arranged along the axial direction of the base circular tube (1), and the short - circuit conductor (9) is located between the corresponding connecting segment and the insulating medium bottom layer (6). The connecting wire (7) is electrically connected to the heating resistor (5) through the power supply pad (8), and one end of the connecting wire (7) is electrically connected to the power supply pad (8). A water - channel housing (2) is disposed around the base circular tube (1). The inner peripheral wall of the water - channel housing (2) is oppositely arranged with the outer peripheral wall of the base circular tube (1). A contact sealing ring (3) extends from the top end of the water - channel housing (2) towards the direction of its axis center. The top end of the base circular tube (1) is connected to the bottom of the contact sealing ring (3). A sealing member (4) is provided at the bottom end of the water - channel housing (2), and the sealing member (4) is respectively connected to the bottom end of the base circular tube (1) and the bottom end of the water - channel housing (2). The connecting wire (7) penetrates through the water - channel housing (2), and the other end of the connecting wire (7) penetrates out of the bottom of the water - channel housing (2). The number of layers of the insulating medium bottom layer (6) is 3 - 5 layers, and the number of layers of the insulating medium outer layer (21) is more than 2 layers. The sealing member (4) is an annular sealing ring. A slot (12) is recessed at the bottom end of the inner peripheral wall of the water - channel housing (2). The annular sealing ring is disposed in the slot (12), and the annular sealing ring is respectively connected to the slot (12) of the water - channel housing (2) and the bottom end of the base circular tube (1).

2. The heater for a new energy vehicle heat pump according to claim 1, characterized in that, The specific layout where the multiple connection segments are connected end to end in sequence to form a meandering and bending shape is as follows: the number of the power supply pads (8) is two, the number of the connecting wires (7) is the same as that of the power supply pads (8), and one connecting wire (7) is electrically connected to one power supply pad (8); the multiple connection segments include: more than one first connection segment (16) and more than one second connection segment (17), the first connection segment (16) is arranged along the circumferential direction of the base circular tube (1), the second connection segment (17) is arranged along the axial direction of the base circular tube (1), the first connection segment (16) and the second connection segment (17) are alternately connected, and the first connection segment (16) and the second connection segment (17) are integrally formed to constitute the heating resistor (5); one of the power supply pads (8) is connected to the first connection segment (16) at the head of the heating resistor (5), and the other power supply pad (8) is connected to the first connection segment (16) at the tail of the heating resistor (5).

3. The heater for a new energy vehicle heat pump according to claim 1, characterized in that, A positioning member (10) extends outward from the bottom end of the outer peripheral wall of the water channel housing (2), and the positioning member (10) is provided with a positioning hole (11).

4. The heater for a new energy vehicle heat pump according to claim 1, characterized in that, The water channel housing (2) is arranged around the base circular tube (1) in a manner of die-casting or machining and sheathing. The contact sealing ring (3), the water channel housing (2), the base circular tube (1) and the sealing member (4) enclose to form an accommodation space, and the accommodation space is filled with an insulating and heat-conducting material.

5. The heater for a new energy vehicle heat pump according to claim 4, characterized in that, An accommodating block (13) extends integrally outward from the outer peripheral wall of the water channel housing (2). An accommodating cavity is provided in the accommodating block (13), and the cross-sectional shape of the accommodating cavity is bent downward. The accommodating cavity is communicated with the accommodation space. One end of the connecting wire (7) is electrically connected to the power supply pad (8), the connecting wire (7) passes through the accommodating cavity, and the other end of the connecting wire (7) passes out through the bottom of the accommodating block (13).

6. The heater for a new energy vehicle heat pump according to claim 1, characterized in that, The water channel housing (2) is arranged around the base circular tube (1) by injection molding. The contact sealing ring (3) is integrally formed by injection molding at the top end of the water channel housing (2), and the sealing member (4) is integrally formed by injection molding at the bottom end of the water channel housing (2).

7. The heater for a new energy vehicle heat pump according to claim 1, characterized in that, A plurality of spiral water channels (14) extend outward from the outer peripheral wall of the water channel housing (2), and the plurality of spiral water channels (14) are arranged at equal intervals.

8. A manufacturing method of a heater for a heat pump of a new energy vehicle, characterized in that, Including: Cutting a plate made of metal or alloy into strip-shaped plates with specified dimensions; Rolling the strip-shaped plates into a cylindrical shape, connecting the two ends of the strip-shaped plates in the axial direction by welding, then drawing the strip-shaped plates into tube-shaped strips with specified lengths through a drawing process, and then manufacturing the tube-shaped strips into the base circular tube (1) through a laser cutting process; Providing more than one insulating dielectric bottom layer (6) on the outer peripheral wall of the base circular tube (1); Arranging the short-circuit conductor (9) and the power supply pad (8) on the outer peripheral wall of the insulating dielectric bottom layer (6); A heating resistor (5) is arranged on the outer peripheral wall of the bottom layer (6) of the insulating medium. The heating resistor (5) is composed of a plurality of connecting segments, and the plurality of connecting segments are connected end to end in sequence to form a layout with a meandering bend. Some of the connecting segments are arranged along the axial direction of the base circular tube (1). A short-circuit conductor (9) is correspondingly closely attached to a connecting segment arranged along the axial direction of the base circular tube (1), and the short-circuit conductor (9) is located between the corresponding connecting segment and the bottom layer (6) of the insulating medium; An outer layer (21) of the insulating medium is arranged on the outer surface of the heating resistor (5), and the bottom layer (6) of the insulating medium and the outer layer (21) of the insulating medium cooperate to cover the heating resistor (5); A water channel housing (2) is arranged on the periphery of the base circular tube (1), and the connecting wire (7) is electrically connected to the heating resistor (5) through the power supply pad (8). One end of the connecting wire (7) is electrically connected to the power supply pad (8), the connecting wire (7) penetrates through the water channel housing (2), and the other end of the connecting wire (7) penetrates through the bottom of the water channel housing (2) and extends out.

Images