A high-voltage heating component based on ceramic heating tube

Abstract

The present invention discloses a high-voltage heating component based on a ceramic heating tube, belonging to the field of heating technology. The heating component comprises a shell, a heating cavity is arranged in the shell, a heating component is arranged in the heating cavity, a control circuit board is arranged on the heating component, the heating component comprises a plurality of ceramic heating tubes, the plurality of ceramic heating tubes are an electrical connection structure in which two are connected in series and then in parallel, and the ceramic heating tube is an MCH ceramic heating tube; a hollow cavity is arranged at one end of the ceramic heating tube, and a first through hole and a second through hole are arranged at both sides of the ceramic heating tube at the hollow cavity, and the first through hole and the second through hole are arranged oppositely and staggered in the ceramic heating tube body in the present invention, so that the heat circulation liquid flows through the inside and outside of the ceramic heating tube at the same time, thereby improving the heat exchange efficiency of the heat circulation liquid, and at the same time, the heat circulation liquid flows into the hollow cavity of the ceramic heating tube, and then flows out from the first through hole and the second through hole, so that the air originally filled in the inner wall space of the ceramic heating tube is discharged more thoroughly.

Description

Technical Field

[0001] The present invention relates to the field of heating technology, and more particularly to a high-voltage heating component based on a ceramic heating tube. Background Art

[0002] There are currently two main technical solutions for high voltage heaters in the thermal management system of new energy vehicles, one is PTC heating and the other is HIC thick film circuit heating. Comparing these two heating technologies, PTC heating has the disadvantages of low heating efficiency, high maintenance cost (all must be replaced once a failure occurs), low safety (the circuit of the PTC heating module cannot protect itself and must be implemented through external auxiliary equipment), short service life, and high energy consumption. On the other hand, HIC thick film circuit technology has the disadvantages of unstable quality, long production cycle, poor impact resistance, and high cost. For the thermal management system of new energy vehicles, the safety, energy saving, replacement cycle and cost of high voltage heaters are the key difficulties in their research and development.

[0003] The automotive thermal management system components based on PTC heating technology are based on the positive temperature coefficient characteristics of semiconductor materials. When the temperature rises to a certain level, the resistance of the PTC material increases sharply, thereby limiting the flow of current and playing a self-protection role. This characteristic makes it heat up quickly in the initial stage, but after the temperature reaches a certain height, the heating rate gradually slows down. In practical applications, automotive thermal management system components based on PTC heating technology have the following defects: ① Low heating efficiency and high energy consumption.

[0004] New energy vehicles have high requirements for battery temperature, especially in winter, when the temperature needs to rise quickly to ensure the charging and discharging efficiency of the power battery. However, the heating efficiency of the PTC heater is low because: as the temperature rises, the resistance of the PTC material increases, resulting in a gradual decrease in the output power. Therefore, it is difficult for the PTC heater to continue to heat efficiently under high temperature conditions. In order to maintain the temperature required by the system, the PTC heating component needs to continuously provide high power and consume a lot of electricity. This high energy consumption characteristic makes it uneconomical in new energy vehicles and has a great impact on the vehicle's cruising range. ② The PTC heating component lacks an intelligent self-protection mechanism. Once the temperature exceeds the design range, the current may cause the PTC component to overheat or even be damaged. Therefore, the system must be equipped with external protection devices (such as temperature control and power regulation devices) to monitor and control the temperature of the PTC heater. In extreme environments or high humidity, the insulation of the PTC heating component may be affected, increasing the risk of leakage. ③ Short service life. PTC materials are sensitive to the working environment. If they are in a state of frequent start-stop and temperature fluctuations for a long time, material aging is prone to occur, resulting in a shortened life. Poor thermal stability. PTC materials are easily degraded under high temperature and high current load, especially when frequently started in winter, which accelerates the aging of the material and causes the heating performance to gradually decrease. Weak environmental adaptability. In the face of extreme temperatures (such as working conditions below -10℃ or above 70℃), the performance of the PTC heating component will drop significantly, especially in cold areas in winter, the performance of the PTC heater is difficult to guarantee, resulting in a significant reduction in the heating effect. ④ Once the PTC heating component is damaged, it usually needs to be replaced as a whole, resulting in high maintenance costs. No modular design. Most of the current PTC heating components are integrated designs and must be replaced as a whole after damage. This structure leads to high maintenance costs and time-consuming maintenance, affecting the normal operation of the vehicle. Difficult to replace. Since the PTC heater is closely integrated with other components of the thermal management system, it is difficult to disassemble and assemble, and the maintenance is complicated. For high-frequency use scenarios, once a failure occurs, the inconvenient maintenance characteristics increase the maintenance burden. ⑤ The thermal management system of new energy vehicles has high requirements for temperature accuracy, and it is difficult for PTC heaters to achieve precise temperature control. The resistance of the PTC material changes with temperature, so the temperature adjustment response is slow and it is not suitable for fast and precise temperature control. The temperature control accuracy of PTC heaters is not high, and temperature fluctuations are prone to occur. They are prone to overheating or underheating under low temperature conditions. Especially when the external temperature fluctuates greatly, the temperature control accuracy of PTC is difficult to guarantee.

[0005] The principle of automotive thermal management system components based on HIC thick film circuit heating technology is to integrate the heating circuit directly on a ceramic or metal substrate and form a heating resistor by coating with thick film materials (such as metal oxides, conductive polymers, etc.). This type of thick film circuit has high insulation and stable resistance-temperature characteristics. In practical applications, heating components based on HIC thick film circuit heating technology have the following defects: ① The production process is complex, the cycle is long, and the process requirements are high. The coating and sintering of thick film circuits require high material stability and process accuracy. A slight deviation in the process may affect the heating effect or lead to an increase in the product defect rate. ② Unstable quality and difficult to ensure product consistency. There may be slight differences in the formulation and thickness of conductive materials in different batches of thick film circuits, making it difficult to ensure product consistency. Performance differences between heaters will affect the overall control effect of the thermal management system.

[0006] During long-term use, thick film circuits may have micro cracks in the conductive layer or thermal aging of the material, resulting in a gradual drift in heating performance and affecting the long-term stability of the system. ③ Poor impact resistance and low reliability. New energy vehicles face external forces such as vibration and impact during driving, and HIC thick film heaters are insufficient in this regard. Thick film circuits mostly use ceramic substrates, which have poor impact resistance and are prone to breakage in high vibration or accidental impact, especially in the bumpy environment of vehicle operation. Poor resistance to environmental stress: HIC thick film components have relatively low adaptability to changes in temperature and humidity, especially under extreme conditions such as high humidity and low temperature, their insulation and conductivity may be affected, reducing reliability. ④ Difficult to repair and high replacement cost. Damage to thick film circuit components is usually irreversible, such as cracks in the substrate or peeling of the conductive layer. Once these situations occur, they are usually difficult to repair. The integrated design of HIC thick film heaters in the thermal management system is difficult to replace modularly, and they need to be replaced as a whole after damage, which will undoubtedly increase maintenance costs.

[0007] In view of this, we propose a high-voltage heating component based on ceramic heating tubes. Summary of the invention

[0008] The object of the present invention is to provide a high-voltage heating component based on a ceramic heating tube to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A high-voltage heating component based on a ceramic heating tube comprises a shell, a heating cavity is arranged in the shell, a heating component is arranged in the heating cavity, a control circuit board is arranged on the heating component, the heating component comprises a plurality of ceramic heating tubes, the plurality of ceramic heating tubes are an electrical connection structure in which two are connected in series and then in parallel, and the ceramic heating tubes are MCH ceramic heating tubes;

[0011] Two partition plates are arranged between two adjacent ceramic heating tubes, one end of the partition plate is connected to the heating cavity, and a water outlet is formed between the other end of the partition plate and the inner wall of the heating cavity. The multiple partition plates form an S-shaped water channel in the heating cavity;

[0012] A hollow cavity is arranged at one end of the ceramic heating tube, and first through holes and second through holes staggered with each other are arranged at both sides of the ceramic heating tube at the hollow cavity.

[0013] Preferably, a power supply plug and a control circuit signal plug are provided through the shell, the power supply plug is used to be connected to the power supply, and the control circuit signal plug is connected to the control circuit board of the heating component;

[0014] A first silver electrode and a second silver electrode are respectively arranged on both sides of one end of the ceramic heating tube, a first lead is arranged on the first silver electrode, and a second lead is arranged on the second silver electrode;

[0015] An electrode assembly is also arranged in the shell, and the electrode assembly is used to be electrically connected to the first lead and the second lead.

[0016] Preferably, the electrode assembly includes a first common electrode, a second common electrode, a third common electrode and a ground electrode, the first common electrode, the second common electrode and the third common electrode are all electrically connected to the control circuit board, the ground electrode is used to connect to the ground wire in the power supply system, and the first common electrode, the second common electrode and the third common electrode are respectively used to electrically connect to the first lead and the second lead.

[0017] Preferably, a heat circulation liquid inlet and a heat circulation liquid outlet are respectively provided on both sides of the shell, and the heat circulation liquid inlet and the heat circulation liquid outlet are both communicated with the heating cavity.

[0018] Preferably, a fixing flange is sleeved on the ceramic heating tube, and the fixing flange is located between the first silver electrode and the first through hole;

[0019] One side of the heating cavity is arranged as a mounting cavity, a mounting body is formed between the heating cavity and the mounting cavity, and a fixing flange penetrates the mounting body and extends into the mounting cavity.

[0020] Preferably, a sleeve is provided on one side of the fixed flange located at the heating cavity, the sleeve is rotatably connected to the fixed flange, a cleaning mechanism is provided on the upper end of the sleeve, and the cleaning mechanism extends to the outer wall of the ceramic heating tube;

[0021] An empty slot is provided in the installation body, and a transmission mechanism is arranged in the empty slot. The transmission mechanism is used for driving the sleeve to rotate.

[0022] Preferably, the cleaning mechanism comprises a mounting bar, the mounting bar is a spiral structure, a brush body extending in a spiral shape is arranged on the inner side of the mounting bar, and the lower end of the mounting bar is connected to the sleeve;

[0023] Fixing strips are arranged on both sides of the ceramic heating tube, and the fixing strips penetrate the installation strips and are connected and fixed with the sleeve.

[0024] Preferably, the transmission mechanism includes multiple sprockets, chains and motors, the sprockets are meshed with the chains, the sprockets are sleeved on the sleeve, the outermost sprocket is rotatably installed in the empty slot, and the outermost sprocket is connected to the output shaft of the motor.

[0025] Preferably, the shell includes a main shell, a front cover body and a rear cover body, and the main shell is movably connected to the front cover body and the rear cover body.

[0026] Preferably, the distance between the outer wall of the ceramic heating tube and the partition plate is 0.5 mm-5 mm.

[0027] Preferably, the above-mentioned high-voltage heating component based on ceramic heating tube is used in new energy vehicles.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The present invention uses ceramic heating technology to replace PTC heating and HIC thick film circuit heating technology, overcoming the problems of low heating efficiency, high energy consumption, and short service life in low temperature environments. Multiple ceramic heating tubes are used to provide stable and efficient heat, achieve balanced pressure distribution, extend service life, and improve heat dissipation efficiency. The quality stability and reliability of the thermal management system of new energy vehicles are improved with greater energy saving, greater safety, and lower maintenance costs. The ceramic heating tube of the heating element of the present invention is directly and completely immersed in the heat circulation fluid. When it starts to work and heat, it directly heats the heat circulation fluid without an intermediate medium, effectively improving the overall heat exchange efficiency of the heating component.

[0030] (2) In the present invention, the first through hole and the second through hole are arranged in opposite and staggered relation on the body of the ceramic heating tube, and a hollow cavity is arranged in the middle of the ceramic heating tube, so that the heat circulation fluid can flow through both the inside and the outside of the ceramic heating tube at the same time, thereby improving the heat exchange efficiency of the heat circulation fluid and providing a more stable heating function for the thermal management system of the entire vehicle. In addition, before the formal start-up of the heating component, the air inside needs to be exhausted and the heat circulation fluid can completely fill the entire space before it can work at high pressure. Another function of the first through hole and the second through hole arranged on the surface of the ceramic heating tube is to allow the heat circulation fluid to flow into the hollow cavity of the ceramic heating tube and then flow out from the first through hole and the second through hole, so that the air originally filled in the inner wall space of the ceramic heating tube can be exhausted more thoroughly, thereby ensuring the stable and safe start-up of the heating component and improving the service life of the heating component.

[0031] (3) The multiple ceramic heating tubes of the present invention are connected in series and then in parallel. First, the ceramic heating tubes are connected in series in groups of two. Then, the two ceramic heating tubes in each group will share the same current, but each will share a part of the voltage. The voltage allocated to a single ceramic heating tube will be very small, which improves the pressure resistance of a single ceramic heating tube and reduces the probability of damage to a single ceramic heating tube. Secondly, in a parallel circuit, after one of the tubes is damaged, the other group of parallel ceramic heating tubes can still work normally, which significantly improves the fault tolerance and environmental adaptability of the heating component. The S-shaped water channel formed by the partition plate in the heating cavity can make the heat exchange between the heat circulation fluid and the ceramic heating tube more sufficient, thereby improving the heat exchange efficiency.

[0032] (4) The end of the ceramic heating tube of the present invention is provided with a fixing flange, which can be tightly fixed to the lower end of the heating water tank shell, and at the same time can play a certain anti-vibration effect, thereby improving the mechanical stability of the ceramic heating tube, thereby improving the overall mechanical stability of the heating component. In this way, in actual scenarios, when the car is driving on a bumpy road, the overall anti-vibration effect of the heating component is good, and its service life will also be extended; and in addition to tightly fixing the heating tube, the fixing flange also has a sealing function, ensuring that the heating tube is sufficiently sealed after being fixed to the bottom of the heating cavity, thereby preventing the heat circulating fluid from leaking from the interface.

[0033] (5) The present invention sets the distance between the ceramic heating tube and the heating cavity partition plate within the range of 0.5 mm to 5 mm, thereby improving the heat exchange efficiency of the heating component. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a rear view schematic diagram of the overall structure of the present invention;

[0036] Figure 3 It is a schematic diagram of the internal structure of the overall structure of the present invention;

[0037] Figure 4 It is a front view of the internal structure of the shell of the present invention;

[0038] Figure 5 It is a schematic diagram of the ceramic heating tube of the present invention;

[0039] Figure 6 It is a cross-sectional schematic diagram of the ceramic heating tube of the present invention;

[0040] Figure 7 This is a schematic diagram of the overall structure of the heating assembly in the second embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the cleaning mechanism structure in the second embodiment of the present invention;

[0042] Fig. 9 It is a schematic diagram of the connection between the first common electrode, the second common electrode, the third common electrode and four ceramic heating tubes of the present invention.

[0043] Explanation of the numbers in the figure: 1. Shell; 101. Main shell; 102. Front cover; 103. Rear cover; 2. Heat circulation liquid inlet 3. Ceramic heating tube; 4. Heating cavity; 5. Partition plate; 6. Power supply plug; 7. First common electrode; 8. Second common electrode; 9. Third common electrode; 10. Ground electrode; 11. Control circuit signal plug; 12. Heat circulation liquid outlet; 13. Installation cavity; 14. Installation body; 15. Fixing bar; 16. Sleeve; 17. Installation bar; 18. Brush body; 19. Motor; 20. Sprocket; 21. Chain; 31. First through hole; 32. Second through hole; 33. Fixing flange; 34. First silver electrode; 35. Second silver electrode; 36. Second lead; 37. First lead; 38. Hollow cavity. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] Embodiment 1:

[0046] See also Figure 1-6 A high-voltage heating component based on a ceramic heating tube comprises a shell 1, a heating cavity 4 is arranged in the shell 1, a heating component is arranged in the heating cavity 4, a control circuit board is arranged on the heating component, wherein the control circuit board is electrically connected to the heating component, the heating component comprises a plurality of ceramic heating tubes 3, and the plurality of ceramic heating tubes 3 are an electrically connected structure in which two are connected in series and then in parallel, wherein the ceramic heating tubes 3 are MCH ceramic heating tubes; MCH is the abbreviation of Metal Ceramics Heater, which means metal ceramic heating element.

[0047] Specifically, multiple ceramic heating tubes 3 are divided into a group of two, and two ceramic heating tubes 3 in a group are connected in series. The output leads of each group of ceramic heating tubes 3 after being connected in series are electrically connected to the first common electrode 7, the second common electrode 8, and the third common electrode 9 to form a circuit loop. First, the ceramic heating tubes 3 are connected in series in groups of two, and the two ceramic heating tubes 3 in each group will share the same current, but each share a part of the voltage. When the resistance values ​​of the two ceramic heating tubes 3 in the same group are equal or similar, the two ceramic heating tubes 3 in each group can share the input voltage equally, and the voltage allocated to a single ceramic heating tube 3 will be very small, which improves the withstand voltage of a single ceramic heating tube 3, reduces the probability of damage to a single ceramic heating tube 3, and extends the service life of a single ceramic heating tube 3, thereby improving the overall service life of the heating assembly. Secondly, multiple groups of heating tubes connected in series are connected in parallel to the circuit. In the parallel circuit, the voltages of each branch are equal, and the current can be divided. Therefore, by connecting in parallel, it can be ensured that all series groups can obtain the same input voltage. At the same time, the current will be distributed in the parallel branches according to the total resistance value of each group.

[0048] Due to the use of the series connection followed by parallel connection, the input voltage is effectively evenly distributed to each ceramic heating tube 3. Compared with using a single high-power heating tube or simply connecting multiple heating tubes in parallel, this connection method can significantly reduce the voltage burden on a single ceramic heating tube 3, thereby improving its voltage resistance. The voltage balancing also reduces the risk of overheating, aging and damage of the heating tube due to excessive voltage. When one of the ceramic heating tubes 3 is damaged and cannot work normally, the other group of parallel ceramic heating tubes 3 can still work normally, which significantly improves the fault tolerance and environmental adaptability of the heating component. Due to the equal distribution of voltage and the reasonable distribution of current, this connection method helps to reduce energy consumption and unnecessary heat loss, and helps to reduce operating costs. The total power and heating efficiency of the entire heating component can also be adjusted by increasing or decreasing the number of series groups to adapt to different heating needs and scenarios.

[0049] Two partition plates 5 are arranged between two adjacent ceramic heating tubes 3. One end of the partition plate 5 is connected to the heating cavity 4. A water outlet is formed between the other end of the partition plate 5 and the inner wall of the heating cavity 4. The plurality of partition plates 5 form an S-shaped water channel in the heating cavity 4. Figure 4 The S-shaped water channel formed by the partition plate 5 can make the heat exchange between the heat circulation fluid and the ceramic heating tube 3 more sufficient, thereby improving the heat exchange efficiency.

[0050] like Figure 6As shown, a hollow cavity 38 is provided at one end of the ceramic heating tube 3, and first through holes 31 and second through holes 32 are provided on both sides of the ceramic heating tube 3 at the hollow cavity 38. The first through holes 31 and the second through holes 32 are arranged in a staggered manner, so that the heat circulation fluid can flow into the hollow cavity 38 and then flow out from the first through holes 31 and the second through holes 32. Figure 4 As shown in Figure 4 The middle arrow points to the flow path of the heat circulating fluid, which allows the heat circulating fluid to flow through both the inside and outside of the ceramic heating tube, thereby improving the heat exchange efficiency of the heat circulating fluid and providing a more stable heating function for the thermal management system of the entire vehicle.

[0051] Specifically, before the heating component of the present invention is officially started, it is necessary to exhaust the air inside and completely fill the entire space with the heat circulating liquid before it can work at high pressure. Therefore, another function of the first through hole 31 and the second through hole 32 is to allow the heat circulating liquid to flow into the cavity 38 of the ceramic heating tube 3 and then flow out from the first through hole 31 and the second through hole 32, so that the air originally filled in the inner wall space of the ceramic heating tube 3 can be discharged more thoroughly, thereby ensuring the stable and safe startup of the heating component and increasing the service life of the heating component.

[0052] In a possible embodiment, the first through holes 31 and the second through holes 32 can also be arranged in multiple groups in a staggered manner to improve the heat exchange efficiency of the heat circulating fluid and provide a more stable heating function for the thermal management system of the entire vehicle. The flow direction of the heat circulating fluid can also be set as needed, and the number of partition plates 5 can also be set as needed. The heat circulating fluid can flow from the first through holes 31 and the second through holes 32 into the hollow cavity 38 and then flow out from the other end of the hollow cavity 38.

[0053] In the present application, a power supply plug 6 and a control circuit signal plug 11 are provided on the shell 1. The power supply plug 6 is used to be connected to the power supply, that is, electrically connected to the power supply end of the car. Its function is to provide the heating component with a high input voltage when it is working. The control circuit signal plug 11 is connected to the control circuit board of the heating component. Its function is to perform power regulation, control and monitoring on the ceramic heating tube 3.

[0054] like Figure 5 As shown, a first silver electrode 34 and a second silver electrode 35 are respectively arranged on both sides of one end of the ceramic heating tube 3, a first lead 37 is arranged on the first silver electrode 34, and a second lead 36 is arranged on the second silver electrode 35; wherein, an electrode assembly is also arranged in the housing 1, and the electrode assembly is used to be electrically connected to the first lead 37 and the second lead 36. wherein, the first silver electrode 34 and the second silver electrode 35 are respectively connected to the first lead 37 and the second lead 36 by welding.

[0055] Specifically, the electrode assembly includes a first common electrode 7, a second common electrode 8, a third common electrode 9 and a grounding electrode 10. The first common electrode 7, the second common electrode 8, and the third common electrode 9 are all electrically connected to the control circuit board. The grounding electrode 10 is used to connect to the ground wire in the power supply system, that is, to connect to the ground wire in the automobile power supply system to ensure the circuit safety of the entire heating assembly. The first common electrode 7, the second common electrode 8, and the third common electrode 9 are respectively used to electrically connect to the first lead 37 and the second lead 36 to form a path.

[0056] In the present application, a heat circulation liquid inlet 2 and a heat circulation liquid outlet 12 are respectively provided on both sides of the shell 1 , and the heat circulation liquid inlet 2 and the heat circulation liquid outlet 12 are both connected to the heating cavity 4 .

[0057] Specifically, after the hot circulating liquid enters the interior of the heating cavity 4 from the hot circulating liquid inlet 2, it circulates along the S-shaped water channel formed by the partition plate 5 in the heating cavity. The hot circulating liquid will slowly fill the interior of the ceramic heating tube 3 and discharge the air inside it. After the ceramic heating tube 3 works, the ceramic heating tube 3 exchanges heat with the hot circulating liquid filling its interior and exterior. At the same time, as the hot circulating liquid flows, the hot circulating liquid heated to the set temperature flows out from the hot circulating liquid outlet 12, providing hot air circulation for the interior of the car and preheating the battery module.

[0058] In the present application, a fixing flange 33 is sleeved on the ceramic heating tube 3, and the fixing flange 33 is located between the first silver electrode 34 and the first through hole 31; one side of the heating cavity 4 is set as an installation cavity 13, and an installation body 14 is formed between the heating cavity 4 and the installation cavity 13, and the fixing flange 33 penetrates the installation body 14 and extends into the installation cavity 13.

[0059] Among them, the setting of the fixing flange 33 is to tightly fix the ceramic heating tube 3 at the lower end of the heating water tank shell 1. At the same time, the tight fixation can have a certain anti-vibration effect, improve the mechanical stability of the ceramic heating tube 3, thereby improving the overall mechanical stability of the heating component. In this way, in actual scenarios, when the car is driving on a bumpy road, the overall anti-vibration effect of the heating component is good, and its service life will also be extended. In addition, in addition to tightly fixing the heating tube and having a certain anti-vibration effect, the fixing flange also plays a sealing role to ensure that the heating tube is sufficiently sealed after being fixed to the bottom of the heating cavity to prevent the heat circulating fluid from leaking from the interface.

[0060] In the present application, the housing 1 includes a main housing 101, a front cover 102 and a rear cover 103. The main housing 101 is movably connected to the front cover 102 and the rear cover 103 for easy disassembly.

[0061] Among them, the above-mentioned high-voltage heating component based on the MCH ceramic heating tube is used in new energy vehicles to provide hot air circulation inside the vehicle and preheat the battery module.

[0062] When the present invention is used, the control circuit signal plug 11 is connected to the control circuit board of the heating component, the power regulation control monitoring of the ceramic heating tube 3 is performed, the power supply plug 6 is electrically connected to the power supply end of the car, the power supply plug 6 is used to realize the electrical connection between the power supply end and the electrode assembly, and the grounding electrode 10 is connected to the ground wire in the car power supply system to ensure the circuit safety of the entire heating component; multiple ceramic heating tubes 3 are connected in series in pairs and then in parallel, such as Fig. 9 As shown in the figure, when connected in series, the first lead 37 of one ceramic heating tube 3 is connected to the second lead 36 of another ceramic heating tube 3; when multiple groups of ceramic heating tubes 3 are connected in series, the unconnected first lead 37 and second lead 36 in each group are used as two output ends of the parallel circuit to form a path with the electrical connection of the first common electrode 7, the second common electrode 8 and the third common electrode 9 respectively; Fig. 9 As shown in the figure, one output end of the two parallel circuits is connected to the first common electrode 7, which is the common end, and the other output end is connected to the second common electrode 8 and the third common electrode 9. The third common electrode 9 and the first common electrode 7 form a heating circuit, and the second common electrode 8 and the first common electrode 7 form a heating circuit.

[0063] After the hot circulating liquid enters the interior of the heating cavity 4 from the hot circulating liquid inlet 2, the hot circulating liquid will circulate along the S-shaped water channel formed by the partition plate 5 in the heating cavity, and at the same time, the hot circulating liquid will flow into the hollow cavity 38 to discharge the air inside it. After the ceramic heating tube 3 works, the ceramic heating tube 3 exchanges heat with the hot circulating liquid filling inside and outside it, and at the same time, as the hot circulating liquid flows, the hot circulating liquid heated to the set temperature flows out from the hot circulating liquid outlet 12, providing hot air circulation for the interior of the car and preheating the battery module.

[0064] Embodiment 2:

[0065] The difference based on Example 1 is that the partition plate 5 is movably connected to the heating cavity, and the spacing between the outer wall of the ceramic heating tube 3 and the partition plate 5 is 0.5mm-5mm. When the spacing between the ceramic heating tube 3 and the partition plate 5 in the heating cavity is set in the range of 0.5mm-5mm, the heat exchange efficiency of the entire heating assembly is better under this spacing setting.

[0066] The experimental verification is as follows:

[0067] Experimental device: Four ceramic heating tubes 3 are built into the heating water tank shell 1, and the external connection is a simulated automobile thermal circulation system, so that the thermal circulation fluid can be circulated for heating. Precision temperature sensors are installed at the thermal circulation fluid inlet 2 and the thermal circulation fluid outlet 12 to monitor the temperature in real time. The spacing between the ceramic heating tube 3 built into the heating water tank and the partition plate 5 can be precisely adjusted within a range of 0.2 mm to 6.0 mm.

[0068] The measuring equipment is:

[0069] Temperature sensor: measures the real-time temperature of the heat circulation liquid inlet 2 and the heat circulation liquid outlet 12.

[0070] Timer: Record the time required to heat up to 45℃.

[0071] Experimental conditions:

[0072] Under the given constant voltage AC230V and power 6600W, the inlet temperature of the heating water tank is maintained at 17.5℃. When the temperature reaches 45℃ during car preheating, the heating rate of the heating tube and the partition is constantly changing.

[0073] Experimental parameters:

[0074] 1. Independent variable: distance between heating tube and partition (0.2mm~6.0mm, 19 groups in total).

[0075] 2. Control variables:

[0076] Constant voltage: 230V; constant power: 6600W; initial temperature of thermal circulation fluid: 17.5℃.

[0077] The ambient temperature remains stable with no additional cooling or heating factors.

[0078] 3. Dependent variable: time to reach 45°C.

[0079] Experimental steps:

[0080] 1. Equipment debugging:

[0081] Ensure the sealing of the water tank, fill the simulated automobile thermal circulation system with thermal circulation fluid, and the initial temperature of the thermal circulation fluid inlet is 17.5℃.

[0082] 2. Testing process:

[0083] Set the initial spacing to 0.2 mm, start the equipment, heat the thermal cycle liquid inlet to an outlet temperature of 45 °C, and record the required time.

[0084] Repeat the test by gradually adjusting the spacing until it reaches 6.0 mm.

[0085] Each set of experiments was cooled to the initial state (17.5°C) to ensure data independence.

[0086] 3. Data recording and processing:

[0087] The heating time corresponding to each spacing is recorded, and examples of 19 sets of experimental data are shown in Table 1 below;

[0088] Table 1:

[0089]

[0090] Data Analysis:

[0091] 1. Peak heating rate:

[0092] When the spacing is between 2.0 mm and 2.5 mm, the heating rate reaches a peak value (about 0.0833°C / second).

[0093] 2. Impact of too small or too large spacing:

[0094] When the spacing is less than 0.5 mm, the fluid resistance is large, the heat transfer efficiency is reduced, and the heating rate is slow.

[0095] When the spacing is greater than 5mm, the contact area between the fluid and the heating tube is insufficient, the heat diffusion is insufficient, and the heating rate decreases.

[0096] Experimental conclusion:

[0097] Experimental data supports theoretical analysis: when the distance between the heating tube and the partition is between 0.5mm and 5mm, the heating rate is significantly higher, and the optimal distance is 2.5mm. When the distance is less than 0.5mm or greater than 5mm, the heating rate decreases significantly.

[0098] Embodiment 3:

[0099] See also Figure 7 , 8 , the difference between the embodiment 1 and the embodiment 1 is that: the fixed flange 33 is located on one side of the heating cavity 4 and is sleeved with a sleeve 16, the sleeve 16 is rotatably connected to the fixed flange 33, and a cleaning mechanism is arranged on the upper end of the sleeve 16, and the cleaning mechanism extends to the outer wall of the ceramic heating tube 3; wherein, an empty groove is provided in the mounting body 14, and a transmission mechanism is arranged in the empty groove, and the transmission mechanism is arranged in the empty groove so that the transmission mechanism will not contact the hot circulating fluid, and the transmission mechanism is used to drive the sleeve 16 to rotate. The sleeve 16 is driven to rotate by the transmission mechanism, and the cleaning mechanism will clean the surface of the ceramic heating tube 3 as the sleeve 16 rotates, so as to prevent the ceramic heating tube 3 from fouling after long-term use.

[0100] In the present application, the cleaning mechanism includes a mounting bar 17, which is a spiral structure. The spiral structure can be set to increase the circulation path of the heat circulation fluid and further improve the heat exchange efficiency. A brush body 18 extending in a spiral shape is set inside the mounting bar 17, and the lower end of the mounting bar 17 is connected to the sleeve 16; fixed bars 15 are set on both sides of the ceramic heating tube 3, and the fixed bars 15 penetrate the mounting bar 17 and are connected and fixed to the sleeve 16. The setting of the fixed bar 15 makes the mounting bar 17 more stably installed, and the upper ends of the two mounting bars 17 can also be connected by a ring, and the ring is rotatably connected to the upper end of the ceramic heating tube 3, further improving the stability of the mounting bar 17 and the brush body 18 when rotating.

[0101] In the present application, the transmission mechanism includes a plurality of sprockets 20, a chain 21 and a motor 19, wherein the sprockets 20 are meshed and connected with the chains 21, the sprockets 20 are sleeved on the sleeve 16, the outermost sprocket 20 is rotatably installed in the empty slot, and the outermost sprocket 20 is connected to the output shaft of the motor 19. The inner wall of the empty slot limits the outer position of the chain 21, so that the chain 21 can mesh with the plurality of sprockets 20, so that the chain 21 can drive the plurality of sprockets 20 to mesh when the chain 21 is in a tensioned state, so that the chain 21 can drive the plurality of sprockets 20 in the middle to rotate.

[0102] In this embodiment, the motor 19 is used to drive the sprocket 20 at the outermost edge to rotate, and the sprocket 20 drives the chain 21 to rotate. When the chain 21 rotates, it drives the remaining sprockets 20 meshing with it to rotate, thereby causing the sleeve 16 to rotate. When the sleeve 16 rotates, it drives the fixing bar 15, the mounting bar 17, and the brush body 18 located at the upper end of the sleeve 16 to rotate. The brush body 18 is used to clean the surface of the ceramic heating tube 3 to prevent scale from accumulating on the surface of the ceramic heating tube 3. At the same time, when cleaning is not needed, the spiral structure of the mounting bar 17 and the brush body 18 can make the heat circulation fluid flow along the spiral path, thereby increasing the flow path and improving the heat exchange efficiency.

[0103] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-voltage heating component based on a ceramic heating tube, comprising a housing (1), a heating cavity (4) being arranged in the housing (1), a heating component being arranged in the heating cavity (4), and a control circuit board being arranged on the heating component, characterized in that: The heating assembly comprises a plurality of ceramic heating tubes (3), wherein the plurality of ceramic heating tubes (3) are electrically connected in series and then in parallel; Two partition plates (5) are arranged between two adjacent ceramic heating tubes (3); one end of the partition plate (5) is connected to the heating cavity (4); a water outlet is formed between the other end of the partition plate (5) and the inner wall of the heating cavity (4); a plurality of the partition plates (5) form an S-shaped water channel in the heating cavity (4); A hollow cavity (38) is provided at one end of the ceramic heating tube (3), and first through holes (31) and second through holes (32) staggered from each other are provided on both sides of the ceramic heating tube (3) at the hollow cavity (38); The ceramic heating tube (3) is sleeved with a fixed flange (33), the fixed flange (33) is located on one side of the heating chamber (4) and sleeved with a sleeve (16), the sleeve (16) is rotatably connected to the fixed flange (33), and a cleaning mechanism is provided at the upper end of the sleeve (16), and the cleaning mechanism extends to the outer wall of the ceramic heating tube (3); One side of the heating cavity (4) is provided as a mounting cavity (13), a mounting body (14) is formed between the heating cavity (4) and the mounting cavity (13), a hollow groove is provided in the mounting body (14), a transmission mechanism is provided in the hollow groove, and the transmission mechanism is used to drive the sleeve (16) to rotate.

2. A high-voltage heating assembly based on a ceramic heating tube according to claim 1, characterized in that: The housing (1) is provided with a power supply plug (6) and a control circuit signal plug (11) extending therethrough, the power supply plug (6) being used to be connected to a power supply, and the control circuit signal plug (11) being connected to a control circuit board of the heating component; A first silver electrode (34) and a second silver electrode (35) are respectively arranged on both sides of one end of the ceramic heating tube (3); a first lead wire (37) is arranged on the first silver electrode (34), and a second lead wire (36) is arranged on the second silver electrode (35); An electrode assembly is also provided in the housing (1), and the electrode assembly is used to be electrically connected to the first lead wire (37) and the second lead wire (36).

3. A high-voltage heating assembly based on a ceramic heating tube according to claim 2, characterized in that: The electrode assembly comprises a first common electrode (7), a second common electrode (8), a third common electrode (9) and a grounding electrode (10); the first common electrode (7), the second common electrode (8) and the third common electrode (9) are electrically connected to a control circuit board; the grounding electrode (10) is used to connect to a ground wire in a power supply system; the first common electrode (7), the second common electrode (8) and the third common electrode (9) are respectively used to electrically connect to a first lead wire (37) and a second lead wire (36).

4. A high-voltage heating assembly based on a ceramic heating tube according to claim 2, characterized in that: The fixing flange (33) is located between the first silver electrode (34) and the first through hole (31); The fixing flange (33) penetrates the mounting body (14) and extends into the mounting cavity (13).

5. A high-voltage heating assembly based on a ceramic heating tube according to claim 1, characterized in that: A heat circulation liquid inlet (2) and a heat circulation liquid outlet (12) are respectively provided on both sides of the shell (1), and the heat circulation liquid inlet (2) and the heat circulation liquid outlet (12) are both connected to the heating cavity (4); The housing (1) comprises a main housing (101), a front cover (102) and a rear cover (103); the main housing (101) is movably connected to the front cover (102) and the rear cover (103).

6. A high-voltage heating assembly based on a ceramic heating tube according to claim 5, characterized in that: The cleaning mechanism comprises a mounting strip (17), the mounting strip (17) being a spiral structure, a brush bristle body (18) extending in a spiral shape being arranged on the inner side of the mounting strip (17), and the lower end of the mounting strip (17) being connected to the sleeve (16); Fixing strips (15) are provided on both sides of the ceramic heating tube (3), and the fixing strips (15) penetrate the mounting strip (17) and are connected and fixed to the sleeve (16).

7. A high-voltage heating assembly based on a ceramic heating tube according to claim 6, characterized in that: The transmission mechanism comprises a plurality of sprockets (20), a chain (21) and a motor (19), wherein the sprockets (20) are meshedly connected with the chain (21), the sprockets (20) are sleeved on a sleeve (16), an outermost sprocket (20) is rotatably mounted in an empty slot, and the outermost sprocket (20) is connected to an output shaft of the motor (19).

8. A high-voltage heating assembly based on a ceramic heating tube according to claim 1, characterized in that: The distance between the outer wall of the ceramic heating tube (3) and the partition plate (5) is 0.5 mm to 5 mm.

9. A high-voltage heating assembly based on a ceramic heating tube according to any one of claims 1 to 8, characterized in that: Applied to new energy vehicles.

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