Multifunctional motor train unit ventilation heater with efficient heat dissipation function

Abstract

The invention relates to the technical field of motor train unit ventilation heaters, in particular to an efficient heat dissipation multifunctional motor train unit ventilation heater which comprises a mounting shell, two guide air ducts, an air filter cartridge, a self-cleaning filter part, a ventilation heating part, a flow guide exhaust part and an air return part. The two guide air ducts are symmetrically arranged on the outer side of the mounting shell in parallel, the air filter cartridge is arranged in the middle of the inner side of the mounting shell, the self-cleaning filter part is arranged in the middle of the inner side of the mounting shell, and the self-cleaning filter part is used for filtering ventilation air and scraping and cleaning the air filter cartridge at the same time; according to the motor train unit ventilation heater, the structural design is optimized, the functions of self-cleaning filtering, efficient heating, airflow guiding and discharging and the like are integrated, and efficient heat dissipation, low maintenance cost and energy-saving and environment-friendly operation of the motor train unit ventilation heater are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor vehicle multiple unit ventilation heaters, and in particular to a multifunctional motor vehicle multiple unit ventilation heater with high-efficiency heat dissipation. Background Art

[0002] The EMU ventilation heater is an important component of the EMU air conditioning system. Its main function is to regulate the temperature inside the train by heating the air, ensuring that the temperature inside the train remains within a comfortable range in winter or cold environments. The ventilation heater usually consists of several main parts, such as a heat source, a heat dissipation device, and a heat transfer pipe. It can preheat and compensate the air entering the train through an air preheater and a passenger compartment air compensation heater, thereby ensuring that the air temperature and humidity inside the train in winter are within the specified range.

[0003] In the existing technology, the conventional filtering device of the multi-functional EMU ventilation heater adopts a fixed filter structure, which is very easy to accumulate dust under high-speed operating conditions and requires frequent manual cleaning (maintenance is required every 5,000 kilometers of operation). The filter replacement process is complicated. The existing self-cleaning technology mostly relies on an electric brushing mechanism, which not only increases energy consumption (additional power consumption of more than 200W) but also has the risk of mechanical failure. The use of a single electric heating pipe heating method has the defects of insufficient heat exchange and uneven temperature distribution. In addition, there is a lack of emergency power supply design, which poses a safety hazard. To this end, we propose a multi-functional EMU ventilation heater with efficient heat dissipation. Summary of the Invention

[0004] The present invention is to solve the shortcomings of the existing technology and proposes a multifunctional EMU ventilation heater with high efficiency and heat dissipation. The multifunctional EMU ventilation heater with high efficiency and heat dissipation effectively solves the above technical problems through innovative cylindrical shell design, pneumatic self-cleaning filtration system, composite heating technology and intelligent airflow distribution solution.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A multifunctional EMU ventilation heater with high-efficiency heat dissipation, comprising an installation shell, a guide air duct, an air filter cartridge, a self-cleaning filter unit, a ventilation and heating unit, an air guide and exhaust unit and a return air unit. The installation shell is arranged in a cylindrical structure, the number of the guide air ducts is two, and the two guide air ducts are arranged in parallel and symmetrically on the outside of the installation shell, the air filter cartridge is arranged in the middle of the inner side of the installation shell, the self-cleaning filter unit is arranged in the middle of the inner side of the installation shell, the self-cleaning filter unit is used to filter the ventilation air and scrape and clean the air filter cartridge at the same time, the ventilation and heating unit is arranged on the lower side of the installation shell, and is used to heat the filtered air, the air guide and exhaust units are arranged on both sides of the ventilation and heating unit, and the return air unit is used to reflux filter the gas in the car.

[0006] Through the above technical solution, the installation shell adopts a cylindrical structure design, which can optimize the flow path of the internal airflow, reduce wind resistance, and improve ventilation efficiency. Two parallel and symmetrical guide air ducts are used to guide external air evenly into the ventilation heater, ensuring balanced airflow distribution. The cylindrical shell has a compact structure and occupies a small space, which is convenient for installation in the limited space of the EMU. The symmetrical guide air ducts can avoid airflow turbulence, improve air intake stability, and enhance overall heat dissipation performance. The air filter cartridge is located in the middle of the inner side of the installation shell and is used to filter the air entering the ventilation heater. The self-cleaning filter unit scrapes away dust attached to the surface of the air filter cartridge to maintain filtration efficiency. The air filter cartridge can effectively intercept dust and particulate matter to improve air quality. The automatic cleaning function of the self-cleaning filter unit reduces the frequency of manual maintenance, extends the service life of the filter cartridge, and ensures long-term and efficient operation.

[0007] Preferably, the self-cleaning filter portion includes a pneumatic scraping assembly and a pneumatic drive assembly, the pneumatic scraping assembly includes a connecting bearing, the connecting bearing is arranged on the upper side of the mounting shell, a connecting rod is rotatably connected in the connecting bearing, a connecting frame is provided at the bottom end of the connecting rod, a connecting ring is provided on the outside of the connecting frame, a plurality of scraping strips are provided on the upper side of the connecting ring, one side of the scraping strip is in conflict with the outside of the air filter cartridge, one side of the air filter cartridge is engaged and rotatably connected to one side of the connecting ring, and an impeller is fixedly sleeved on the outside of the connecting rod.

[0008] Through the above technical solution, the connecting bearing supports the connecting rod to rotate, and the impeller is driven by the airflow to drive the connecting rod to rotate, so that the scraper scrapes along the surface of the air filter cartridge to remove dust, and uses the power of the airflow itself to achieve cleaning without the need for additional energy, which is energy-saving and environmentally friendly; the scraping structure is simple and reliable, and the maintenance cost is low.

[0009] Preferably, the pneumatic drive assembly includes a plug-in slot, several of which are arranged on the outside of the top end of the connecting rod, a plug-in strip is inserted into the plug-in slot, a wind plate is provided on one side of the plug-in strip, a threaded groove is provided at the top end of the connecting rod, a threaded fixing part is threadedly connected in the threaded groove, and one side of the threaded fixing part conflicts with one side of the plug-in strip.

[0010] Through the above technical solution, the plug-in strip is connected to the connecting rod through the plug-in slot. The wind plate drives the connecting rod to rotate under the action of wind force, and the threaded fasteners lock the plug-in strip to ensure structural stability. The modular design facilitates disassembly and replacement to adapt to different wind speed environments; the wind plate can adjust the angle to optimize the efficiency of wind energy utilization.

[0011] Preferably, the ventilation and heating part includes a connecting air duct, which is detachably connected to the lower side of the connecting ring, a battery ring is embedded on the outer side of the connecting air duct, a plurality of storage grooves are provided on the inner side of the connecting air duct, a mounting frame is provided on the lower side of the connecting air duct, a thermoelectric module is provided in the storage groove, and an electric heating element is provided on the upper side of the mounting frame.

[0012] Preferably, a sealing groove is provided on the upper side of the connecting air duct, and an expansion seal is provided on the lower side of the connecting ring, and the expansion seal is connected in the sealing groove.

[0013] Through the above technical solution, the connecting air duct guides the filtered air into the heating area, the thermoelectric module and the electric heating element heat the air, the battery ring provides a stable power supply, and the thermoelectric module and the electric heating element combine for heating, with a fast heating speed and low energy consumption; the detachable connecting air duct is easy to maintain, and the sealing groove design prevents heat leakage.

[0014] Preferably, the air guide and exhaust part includes a diverter shell, which is arranged on the lower side of the connecting air duct, a diverter part is provided on the inner side of the diverter shell, two exhaust pipes are provided in parallel and symmetrically on the outer side of the diverter shell, and an air outlet grille is provided on one side of the exhaust pipe.

[0015] Through the above technical solution, the diverter shell evenly distributes the heated air to the two exhaust ducts through the diverter. The air outlet grille adjusts the direction and speed of the air flow. The double exhaust duct design improves the air supply coverage range. The diverter ensures uniform air flow distribution to avoid local overheating or low temperature areas.

[0016] Preferably, the return air part includes a return air duct, which is arranged on the lower side of the installation shell, a fan is arranged in the return air duct, an air suction port is arranged at the bottom end of the return air duct, an air outlet is arranged at the top end of the return air duct, filter plates are arranged in the air suction port and the air outlet, a return air cavity is arranged in the installation shell, and the return air cavity is arranged in a communicating structure with the air outlet and the installation shell.

[0017] Through the above technical solution, the fan draws the air in the car through the return air duct, and the filter plate filters it twice before sending it back into the installation shell for recycling. The return air design reduces energy waste and improves thermal efficiency; the double-layer filter plate further purifies the air to ensure the air quality in the car.

[0018] In summary, the present invention achieves efficient heat dissipation, low maintenance cost and energy-saving and environmentally friendly operation of the EMU ventilation heater by optimizing structural design, integrating self-cleaning filtration, efficient heating and airflow guidance and other functions.

[0019] The present invention realizes automatic cleaning through the self-cleaning filter part through the pneumatic drive component, which can reduce the frequency of manual maintenance. The unique design of dynamic contact between the scraper and the air filter cartridge ensures the cleaning effect while avoiding damage to the filter material. The air filter cartridge is located in the middle of the inner side of the installation shell, which can effectively intercept dust, particulate matter and other impurities in the air, provide clean air for the EMU compartment, and ensure the respiratory health of passengers. The pneumatic scraping component of the self-cleaning filter part uses the power generated by ventilation to drive the impeller to rotate, and then the scraper strips scrape the air filter cartridge to clean it. This design does not require an additional power source, and can achieve cleaning only by relying on the ventilation process itself. It is both energy-saving and efficient, avoids the problem of poor ventilation due to blockage of the filter cartridge, extends the service life of the air filter cartridge, and reduces maintenance costs and replacement frequency.

[0020] The present invention achieves rapid heating through a composite heating scheme of thermoelectric modules and electric heating elements. The embedded design of the battery ring provides a stable power supply, which can maintain the system operation for more than 2 hours in the event of a power outage, significantly improving reliability. The connecting air duct of the ventilation and heating part is provided with a thermoelectric module and an electric heating element, which can quickly heat the filtered air, provide a warm and comfortable environment in the car, and meet the heating needs of the EMU in cold weather. The outer side of the connecting air duct is embedded with a battery ring. During the heating process, the battery ring can absorb part of the heat and play a certain heat dissipation role, thereby preventing the heating components from being damaged due to excessive temperature, thereby improving the stability and service life of the heating system. At the same time, the connecting air duct and the connecting ring are sealed by the cooperation of the expansion seal and the sealing groove, which can not only ensure the heating efficiency but also prevent excessive heat loss, thereby achieving a balance between heating and heat dissipation.

[0021] In the present invention, two guide air ducts are arranged in parallel and symmetrically on the outside of the mounting shell, which can guide the air to enter the ventilation heater in an orderly manner, make the airflow more stable, improve the ventilation efficiency, and avoid the poor ventilation and noise problems caused by airflow turbulence. The diverter shell and diverter part of the guide and exhaust part can evenly divert the heated air to the two exhaust pipes, and evenly send the hot air into the car through the air outlet grille, thereby ensuring the uniform distribution of temperature in the car and improving the comfort of the passengers.

[0022] In the present invention, a ventilator is provided in the return air duct of the return air part, which can draw the gas in the car back to the ventilation heater for reflux filtration, thereby realizing the recycling of air and reducing energy waste. At the same time, the filter plates in the air intake and outlet can filter the return air again to further improve the air quality. Through reasonable airflow organization and return air circulation design, energy consumption is reduced while meeting the ventilation and heating needs in the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic structural diagram of the front axial side of the present invention; Figure 2 It is a schematic diagram of the explosive structure of the present invention; Figure 3 This is a schematic diagram of the explosive structure of the self-cleaning filter portion of the present invention; Figure 4 This is a schematic diagram of the explosive structure of the ventilation and heating part of the present invention; Figure 5 This is a schematic diagram of the explosive structure of the air guide and exhaust part of the present invention; Figure 6 This is a schematic structural diagram of the present invention when the top surface is cut off from the axial side; Figure 7 This is a schematic structural diagram of one of the axial sides of the front section of the present invention; Figure 8 This is a schematic structural diagram of the second axial side of the front section of the present invention.

[0024] In the figure: 1. Mounting shell; 2. Guide air duct; 3. Self-cleaning filter unit; 31. Connecting bearing; 32. Connecting rod; 33. Connecting frame; 34. Connecting ring; 35. Scraper; 36. Plug-in slot; 37. Plug-in strip; 38. Air plate; 39. Threaded groove; 310. Threaded fixing part; 311. Impeller part; 4. Ventilation and heating unit; 41. Connecting air duct; 42. Battery ring; 43. Storage slot; 44. Mounting frame; 45. Thermoelectric module; 46. Electric heating element; 5. Air guide and exhaust unit; 51. Diverter shell; 52. Diverter; 53. Exhaust duct; 54. Air outlet grille; 6. Return air unit; 61. Return air duct; 62. Fan; 63. Filter plate; 7. Air filter cartridge. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0026] like Figures 1-8 As shown, a multifunctional EMU ventilation heater with efficient heat dissipation includes a mounting shell 1, which is fixed at a suitable position in the EMU carriage. The mounting shell 1 is a cylindrical structure, which has good spatial adaptability and structural stability. During installation, ensure that the upper and lower ends of the mounting shell 1 are tightly matched with the EMU ventilation system and the connection parts inside the carriage respectively to ensure the overall stability of the ventilation heater.

[0027] Two guide air ducts 2 are symmetrically arranged parallel to the outside of the mounting housing 1. These guide air ducts 2 guide outside air into the ventilation heater in an orderly manner. During assembly, the connection between the guide air ducts 2 and the mounting housing 1 must be tight and well sealed to prevent air leakage during entry, which could affect ventilation efficiency. Furthermore, the inlet direction of the guide air ducts 2 must be aligned with the air flow direction of the EMU to ensure smooth air introduction.

[0028] The air filter cartridge 7 is arranged in the middle of the inner side of the mounting shell 1. The air filter cartridge 7 is one of the key components of the ventilation heater and is used to perform preliminary filtration on the incoming air to remove impurities such as dust and particulate matter. When installing the air filter cartridge 7, it is necessary to ensure that it fits tightly with the inner wall of the mounting shell 1, and at the same time ensure that the air can pass through the filter cartridge smoothly. In addition, one side of the air filter cartridge 7 needs to be engaged and rotatably connected to one side of the subsequently installed connecting ring 34 to provide a basis for the normal operation of the self-cleaning filter unit 3.

[0029] Connection between the connecting bearing 31 and the connecting rod 32: First, install the connecting bearing 31 on the upper side of the mounting shell 1, and then insert the upper end of the connecting rod 32 into the connecting bearing 31 so that it can rotate freely in the connecting bearing 31. The connecting rod 32 is the core component of the pneumatic scraping assembly, and its rotation will drive the subsequent scraping strip 35 to clean the air filter cartridge 7.

[0030] Assembly of the connecting frame 33, the connecting ring 34 and the scraper 35: Install the connecting frame 33 at the bottom end of the connecting rod 32, and then install the connecting ring 34 on the outside of the connecting frame 33. Subsequently, evenly install several scrapers 35 on the upper side of the connecting ring 34, and ensure that one side of the scraper 35 is in close contact with the outside of the air filter cartridge 7. In this way, when the connecting rod 32 rotates, the scraper 35 can effectively scrape and clean the outer surface of the air filter cartridge 7.

[0031] Installation of the impeller 311: Finally, the impeller 311 is fixedly sleeved on the outer side of the connecting rod 32. The impeller 311 is the power source of the wind-driven scraping assembly. When the air enters the ventilation heater through the guide air duct 2, it will blow the impeller 311 to rotate, thereby driving the connecting rod 32 and the scraper 35 thereon to rotate, realizing the self-cleaning function of the air filter cartridge 7.

[0032] The coordination between the plug-in slots 36 and the plug-in strips 37: a number of plug-in slots 36 are evenly arranged on the outer side of the top end of the connecting rod 32, and then the plug-in strips 37 with wind plates 38 are respectively inserted into these plug-in slots 36. The function of the wind plates 38 is to further enhance the effect of the pneumatic drive, so that the connecting rod 32 can rotate more stably and efficiently.

[0033] Fixing of the thread groove 39 and the threaded fixing part 310: A threaded groove 39 is set at the top of the connecting rod 32, and the threaded fixing part 310 is screwed into the threaded groove 39 so that one side of the threaded fixing part 310 is tightly in contact with one side of the plug-in strip 37. In this way, the plug-in strip 37 is firmly fixed to the connecting rod 32 to ensure that the pneumatic drive assembly will not loosen or fall off during operation.

[0034] The connecting air duct 41 is detachably connected to the lower side of the connecting ring 34. This detachable connection method facilitates the installation, maintenance and replacement of the ventilation and heating part 4. During the connection process, it is necessary to ensure the sealing between the connecting air duct 41 and the connecting ring 34 to prevent heat from being lost during the heating process and affecting the heating efficiency.

[0035] A battery ring 42 is embedded in the outer side of the connecting air duct 41. The main function of the battery ring 42 is to absorb part of the heat during the heating process, play a certain heat dissipation effect, and prevent the ventilation and heating part 4 from being damaged due to excessive temperature. At the same time, the battery ring 42 can also provide auxiliary power for other components of the ventilation heater, thereby improving the energy utilization efficiency of the equipment.

[0036] Several storage grooves 43 are evenly arranged on the inner side of the connecting air duct 41, and then thermoelectric modules 45 are respectively installed in these storage grooves 43. The thermoelectric module 45 is one of the core heating components of the ventilation and heating part 4, which can convert electrical energy into thermal energy to heat the filtered air.

[0037] A mounting bracket 44 is installed on the lower side of the connecting air duct 41, and an electric heating element 46 is installed on the upper side of the mounting bracket 44. The electric heating element 46 works in conjunction with the thermoelectric module 45 to further improve the heating efficiency and ensure that the air can be quickly and evenly heated to the required temperature.

[0038] A sealing groove is provided on the upper side of the connecting air duct 41, and an expansion seal is installed on the lower side of the connecting ring 34. The expansion seal is connected in the sealing groove. Through the expansion effect of the expansion seal, the sealing performance between the connecting air duct 41 and the connecting ring 34 is further enhanced to prevent heat leakage. At the same time, it can also effectively prevent dust and other impurities from entering the ventilation and heating part 4 and affecting its normal operation.

[0039] The diverter shell 51 is arranged at the lower side of the connecting air duct 41, and a diverter member 52 is installed on the inner side of the diverter shell 51. The function of the diverter member 52 is to evenly divert the heated air so that it can be delivered into the vehicle compartment more efficiently.

[0040] Two exhaust ducts 53 are arranged in parallel and symmetrically on the outside of the diversion shell 51, and an air outlet grille 54 is installed on one side of each exhaust duct 53. The air outlet grille 54 not only serves to be aesthetically pleasing, but also further disperses the exhausted hot air, making the temperature distribution in the car more uniform and improving the comfort of the passengers.

[0041] The return air duct 61 is set at the lower side of the installation shell 1, and the ventilator 62 is installed in the return air duct 61. The ventilator 62 is the core component of the return air part 6, which is used to draw the gas in the car back to the ventilation heater for reflux filtration to achieve air recycling.

[0042] An air intake is set at the bottom end of the return air duct 61, an air outlet is set at the top end, and filter plates 63 are installed in the air intake and outlet. The function of the filter plate 63 is to filter the return air again to further improve the air quality. At the same time, it is necessary to ensure that the air intake and outlet are unobstructed so that the ventilator 62 can work normally and realize effective circulation of air in the car.

[0043] A return air chamber is set in the installation shell 1, and the return air chamber is connected to the air outlet and the installation shell 1. The function of the return air chamber is to provide a stable channel for return air, ensuring that the return air can smoothly enter the ventilation heater for filtration and heating.

[0044] It should be noted that the mounting shell 1 is made of 304 stainless steel, has a cylindrical structure, a diameter of 600mm and a height of 800mm. Two aluminum alloy guide air ducts 2 are welded symmetrically at 180° on both sides of the shell. The cross-section of the air duct is a rectangle of 200mm×150mm and a length of 500mm. Guide ribs are set on the inner wall to reduce wind resistance.

[0045] The wiper strip 35 is made of polyurethane.

[0046] The air filter cartridge uses H13 grade glass fiber filter material.

[0047] The sealing groove is filled with a silicone expansion seal that is temperature resistant to 350°C.

[0048] The splitter housing 51 is made of cast aluminum, and the internal flow channel is designed through CFD optimization; The diverter 52 adopts a 3D printed grid structure with a grid pitch of 20 mm; Two φ150mm exhaust pipes 53 extend outward at an angle of 15°; The air outlet grille 54 is an adjustable shutter structure with an adjustment range of 0-90°.

[0049] The return air duct 61 adopts a φ200mm stainless steel corrugated pipe; The fan 62 uses an EC motor with a power of 300W and an air volume of 800m³ / h; The double-layer filter plates 63 are G4 primary filter and F7 medium filter; The return air chamber volume is designed to be 0.5m³ and the cavity wall thickness is 2mm.

[0050] This multifunctional EMU ventilation heater with high efficiency and heat dissipation is equipped with a system-configured intelligent control unit to achieve: automatic adjustment of heating power according to temperature sensor signals; Start the self-cleaning process according to the pressure difference sensor data; Optimize the wind vane angle through wind speed sensor; It has fault self-diagnosis and remote monitoring functions.

[0051] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multifunctional EMU ventilation heater with high efficiency heat dissipation, characterized in that: include An installation shell (1), wherein the installation shell (1) is arranged in a cylindrical structure; Guide air ducts (2), the number of the guide air ducts (2) is two, and the two guide air ducts (2) are arranged in parallel and symmetrically on the outside of the mounting housing (1); An air filter cartridge (7), the air filter cartridge (7) being arranged in the middle portion of the inner side of the mounting housing (1); A self-cleaning filter portion (3), the self-cleaning filter portion (3) being arranged in the middle of the inner side of the mounting housing (1), the self-cleaning filter portion (3) being used to filter the ventilation air and simultaneously scrape and clean the air filter cartridge (7); A ventilation and heating unit (4), the ventilation and heating unit (4) being arranged on the lower side of the mounting housing (1) and being used to heat the filtered air; An air guide and exhaust portion (5), the air guide and exhaust portion (5) being arranged on both sides of the ventilation and heating portion (4); The return air portion (6) is used to perform backflow filtering on the air in the vehicle compartment.

2. The multifunctional EMU ventilation heater with high heat dissipation efficiency according to claim 1 is characterized in that: The self-cleaning filter portion (3) includes a pneumatic scraping assembly and a pneumatic drive assembly, the pneumatic scraping assembly includes a connecting bearing (31), the connecting bearing (31) is arranged on the upper side of the mounting housing (1), a connecting rod (32) is rotatably connected in the connecting bearing (31), a connecting frame (33) is provided at the bottom end of the connecting rod (32), a connecting ring (34) is provided on the outer side of the connecting frame (33), a plurality of scraping strips (35) are provided on the upper side of the connecting ring (34), one side of the scraping strips (35) is in contact with the outer side of the air filter cartridge (7), one side of the air filter cartridge (7) is engaged and rotatably connected to one side of the connecting ring (34), and an impeller (311) is fixedly sleeved on the outer side of the connecting rod (32).

3. The multifunctional EMU ventilation heater with high heat dissipation efficiency according to claim 2 is characterized in that: The pneumatic drive assembly includes a plug-in slot (36), a plurality of the plug-in slots (36) are arranged on the outside of the top end of the connecting rod (32), a plug-in strip (37) is inserted into the plug-in slot (36), a wind plate (38) is provided on one side of the plug-in strip (37), a threaded slot (39) is provided at the top end of the connecting rod (32), a threaded fixing member (310) is connected to the inner thread of the threaded slot (39), and one side of the threaded fixing member (310) conflicts with one side of the plug-in strip (37).

4. The multifunctional EMU ventilation heater with high heat dissipation efficiency according to claim 2, characterized in that: The ventilation and heating portion (4) includes a connecting air duct (41), the connecting air duct (41) is detachably connected to the lower side of the connecting ring (34), a battery ring (42) is embedded on the outer side of the connecting air duct (41), a plurality of storage grooves (43) are provided on the inner side of the connecting air duct (41), a mounting frame (44) is provided on the lower side of the connecting air duct (41), a thermoelectric module (45) is provided in the storage groove (43), and an electric heating element (46) is provided on the upper side of the mounting frame (44).

5. The multifunctional EMU ventilation heater with high heat dissipation efficiency according to claim 4 is characterized in that: A sealing groove is provided on the upper side of the connecting air duct (41), and an expansion seal is provided on the lower side of the connecting ring (34), wherein the expansion seal is connected in the sealing groove.

6. The multifunctional EMU ventilation heater with high heat dissipation efficiency according to claim 4, characterized in that: The air guide and exhaust portion (5) comprises a diverter shell (51), the diverter shell (51) being arranged on the lower side of the connecting air duct (41), a diverter member (52) being arranged on the inner side of the diverter shell (51), two exhaust pipes (53) being arranged in parallel and symmetrically on the outer side of the diverter shell (51), and an air outlet grille (54) being arranged on one side of the exhaust pipe (53).

7. The multifunctional EMU ventilation heater with high heat dissipation efficiency according to claim 1, characterized in that: The return air portion (6) includes a return air duct (61), the return air duct (61) is arranged at the lower side of the mounting shell (1), a ventilator (62) is arranged in the return air duct (61), an air suction port is arranged at the bottom end of the return air duct (61), an air outlet is arranged at the top end of the return air duct (61), filter plates (63) are arranged in both the air suction port and the air outlet, a return air cavity is arranged in the mounting shell (1), and the return air cavity is arranged in a structure communicating with the air outlet and the mounting shell (1).

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