Efficient low-noise fresh air system based on direct-current brushless variable frequency motor

Abstract

The invention discloses an efficient low-noise fresh air system based on a direct current brushless variable frequency motor, and belongs to the technical field of fresh air systems, the efficient low-noise fresh air system comprises a machine body, a fresh air inlet cavity, an exhaust air inlet cavity, a fresh air conveying cavity and an exhaust air output cavity are formed in the machine body, and a fresh air inlet pipe is arranged on the machine body and located on one side of the fresh air inlet cavity; a fresh air inlet pipe is arranged in the machine body, a fresh air filter is arranged in the fresh air inlet pipe, an exhaust air inlet pipe is arranged on the machine body and located on one side of the exhaust air inlet cavity, an exhaust air valve is arranged in the exhaust air inlet cavity, a heat exchange core is arranged in the machine body, and the bottom of the heat exchange core communicates with the fresh air inlet cavity and the exhaust air inlet cavity. The direct-current brushless variable frequency motor and the heat exchange core are adopted, energy recovery is optimized, energy consumption is reduced, and operation requirements of different seasons are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fresh air system, in particular to a high-efficiency and low-noise fresh air system based on direct-current brushless variable frequency motor. BACKGROUND

[0002] The fresh air system is a set of independent air handling system composed of a supply air system and an exhaust air system, which can be divided into two kinds of duct type fresh air system and ductless fresh air system. The system is to send fresh air to the room on one side of the closed room by special equipment, and then exhaust it to the outdoor from the other side by special equipment, so as to form a "fresh air flow field" in the room, thereby meeting the needs of indoor fresh air exchange.

[0003] The existing fresh air system includes an exhaust fan and a fresh air fan, which are used to quickly exchange the air between indoor and outdoor, so as to improve the quality of indoor air. At the same time, the system is equipped with a heat exchanger, which is used to improve the temperature of the incoming fresh air in winter, so as to achieve energy saving. At the same time, the fresh air system can cooperate with the air conditioner evaporator, so as to adjust the temperature of the fresh air.

[0004] For the above technical conditions, there are still defects: in the prior art, the fresh air system usually adopts alternating current motor or ordinary direct current motor drive, and the transmission mode is mostly direct mechanical connection, which is easy to produce larger running noise, and the energy efficiency is low, which is difficult to meet the demand of high efficiency and energy saving.

[0005] Based on this, the present application designs a high-efficiency and low-noise fresh air system based on direct-current brushless variable frequency motor to solve the above problems. SUMMARY

[0006] The present application aims to provide a high-efficiency and low-noise fresh air system based on direct-current brushless variable frequency motor to solve the above technical problems.

[0007] To achieve the above object, the present application provides the following technical scheme: a high-efficiency and low-noise fresh air system based on a direct-current brushless variable-frequency motor, comprising a body, a fresh air inlet cavity, an exhaust air inlet cavity, a fresh air conveying cavity and an exhaust air output cavity are arranged in the body, a fresh air inlet pipe is arranged on the body and located at one side of the fresh air inlet cavity, a fresh air filter is arranged in the fresh air inlet pipe, an exhaust air inlet pipe is arranged on the body and located at one side of the exhaust air inlet cavity, an exhaust air damper is arranged in the exhaust air inlet cavity, a heat exchange core is arranged in the body, the bottom of the heat exchange core is communicated with the fresh air inlet cavity and the exhaust air inlet cavity respectively, the top of the heat exchange core is communicated with the fresh air conveying cavity and the exhaust air output cavity respectively, a fresh air fan drum is arranged in the fresh air conveying cavity, an exhaust air fan drum is arranged in the exhaust air output cavity, the fresh air fan drum and the exhaust air fan drum each comprise an outer shell and an inner impeller, an exhaust air output pipe is communicated with one side of the exhaust air output cavity, a driving motor is arranged in the body and located in the exhaust air output cavity, a first transmission shaft is fixed coaxially on the output shaft of the driving motor, a first rotating shaft is arranged coaxially on the impeller of the exhaust air fan drum, a first magnetic wheel set is arranged on the first transmission shaft and the first rotating shaft, a gear transmission mechanism is arranged in the body and located on the first transmission shaft, a second transmission shaft is connected to the gear transmission mechanism, a second rotating shaft is arranged coaxially on the impeller of the fresh air fan drum, a second magnetic wheel set is arranged on the second transmission shaft and the second rotating shaft, a sound-eliminating static pressure tank, a fresh air high-efficiency filter and an evaporator are sequentially arranged in one side of the body.

[0008] By adopting the above technical scheme, the fresh air system adopts a brushless motor and a non-contact transmission, so that good noise reduction can be achieved.

[0009] Preferably, a circulating air cavity is further arranged in the body, a circulating air inlet pipe is arranged on the body and located at the circulating air cavity, a circulating air fan drum is arranged in the inner side of the circulating air cavity, a circulating air fan is arranged on the circulating air fan drum, the circulating air fan drum comprises an outer shell and an inner impeller, the output shaft of the circulating air fan is coaxially connected to the impeller, and a circulating air damper is arranged at the connection between the circulating air cavity and the conveying air cavity.

[0010] By adopting the above technical scheme, the circulating air cavity and the circulating air fan are arranged, so that the indoor air can be recycled and mixed with fresh air to be sent into the room, thereby improving energy efficiency and comfort and reducing energy loss.

[0011] Preferably, the gear transmission mechanism comprises a shell, a first gear and a second gear are arranged in the shell and mesh with each other, the first gear is arranged coaxially on the first transmission shaft, and the second gear is arranged coaxially on the second transmission shaft.

[0012] By adopting the above technical scheme, the gear set that meshes with each other is adopted to ensure that the first transmission shaft and the second transmission shaft rotate reversely and synchronously, so that the air inlet and the air outlet cylinder work evenly, and the stability and efficiency of the fresh air system are improved.

[0013] Preferably, the inside of the air exhaust output cavity is further provided with a heat dissipation pipe, one end of the heat dissipation pipe is communicated with the shell, the other end of the heat dissipation pipe is connected with a heat conduction pipe, the heat conduction pipe is uniformly wound on the outer wall of the driving motor, one end of the heat conduction pipe is communicated with the other side of the shell, and lubricating oil is arranged in the inside of the shell, the heat conduction pipe and the heat dissipation pipe.

[0014] By adopting the above technical scheme, the lubricating oil is circulated through the heat dissipation pipe and the heat conduction pipe, not only lubricating the gear transmission mechanism, but also guiding the heat of the driving motor to the air exhaust output cavity, and the reliability of the system during long-time operation is improved by using air exhaust heat dissipation.

[0015] Preferably, the first magnetic wheel set includes a driving magnetic wheel and a driven magnetic wheel, the driving magnetic wheel and the driven magnetic wheel are vertically staggered, the driving magnetic wheel is coaxially arranged on the first transmission shaft, the driven magnetic wheel is coaxially arranged on the first rotating shaft, and the second magnetic wheel set has the same structure as the first magnetic wheel set.

[0016] By adopting the above technical scheme, the magnetic wheel set is used to realize non-contact transmission, reduce mechanical friction and noise, and avoid wear and tear of the traditional transmission mode, so as to improve the silent effect and service life.

[0017] Preferably, a bypass air valve is arranged between the fresh air inlet cavity and the air exhaust inlet cavity.

[0018] By adopting the above technical scheme, the bypass air valve is arranged to allow part of the fresh air to bypass the heat exchange core and directly enter the conveying cavity in a specific mode, so as to realize rapid ventilation and improve the adaptability and efficiency of the system in the transition season.

[0019] Preferably, a drain pipe is arranged inside the machine body and below the evaporator, an electric control box is further arranged at the bottom of the machine body, and mounting blocks are fixedly arranged at the four corners of the outside of the machine body.

[0020] By adopting the above technical scheme, the drain pipe is used to timely drain the condensed water generated by the evaporator, the electric control box is used to centrally control the circuit, and the mounting blocks are used to facilitate the fixation of the machine body, so as to improve the practicability and safety of the system.

[0021] In summary, the present application has the following beneficial technical effects: 1. High efficiency and energy saving: The direct-current brushless variable frequency motor and the heat exchange core are adopted to optimize energy recovery, reduce energy consumption, and adapt to the operation requirements in different seasons.

[0022] 2. Low noise operation: Through the magnetic wheel group non-contact transmission and sound pressure tank design, significantly reduce mechanical friction and airflow noise, improve indoor comfort.

[0023] 3. Multifunctional adaptability: Support fresh air, mixed air and bypass and other modes, realize flexible air treatment, improve system applicability and energy saving.

[0024] 4. Stable and reliable: Integrated heat dissipation system and lubrication cycle, through the gear set work at the same time to drive the lubricating oil flow, without additional drive pump can effectively control the motor temperature, prolong the service life, ensure long time stable work.

[0025] 5. Compact structure: Drain pipe, electrical control box and mounting block design to enhance the practicability, easy to install and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will be briefly introduced to the drawings needed to be used for the embodiment description, obviously, the drawings in the following description only some embodiments of the present application, for those skilled in the art, without creative labor, according to these drawings, other drawings can also be obtained.

[0027] Figure 1 The overall structure of the embodiment is shown in the figure; Figure 2 The structure of the gear transmission mechanism in the embodiment is shown in the figure; Figure 3 The structure of the magnetic wheel group in the embodiment is shown in the figure; Figure 4 The principle of fresh air mode A is shown in the figure; Figure 5 The principle of mixed air mode B is shown in the figure; Figure 6 The principle of bypass mode C is shown in the figure.

[0028] In the drawings, the components represented by each number are listed as follows: 1, body; 2, fresh air into the chamber; 3, exhaust air into the chamber; 4, fresh air delivery chamber; 5, exhaust air output chamber; 6, circulating air chamber; 7, fresh air into the tube; 8, exhaust air into the tube; 9, exhaust air valve; 10, heat exchange core; 11, fresh air air cylinder; 12, exhaust air cylinder; 13, exhaust air output tube; 14, drive motor; 15, No. 1 transmission shaft; 16, No. 1 magnetic wheel group; 161, active magnetic wheel; 162, passive magnetic wheel; 17, No. 1 rotating shaft; 18, gear transmission mechanism; 181, housing; 182, No. 1 gear; 183, No. 2 gear; 19, No. 2 transmission shaft; 20, No. 2 magnetic wheel group; 21, No. 2 rotating shaft; 22, sound attenuation static pressure tank; 23, fresh air high efficiency filter; 24, evaporator; 25, drain pipe; 26, electric control box; 27, circulating air inlet pipe; 28, circulating air cylinder; 29, circulating fan; 30, circulating air valve; 31, heat dissipation pipe; 32, heat conduction pipe; 33, mounting block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0030] The above description is made in conjunction with the drawings in the embodiments of the present application. Figures 1-6 The present application is further described in detail.

[0031] The utility model provides a kind of high-efficiency low-noise fresh air system based on direct-current brushless variable frequency motor, including body 1, new air inlet cavity 2, exhaust air inlet cavity 3, fresh air conveying cavity 4 and exhaust air output cavity 5 are provided in the inside of body 1, new air inlet pipe 7 is provided on body 1 and located the side of new air inlet cavity 2, new air filter is provided in the inside of new air inlet pipe 7, exhaust air inlet pipe 8 is provided on body 1 and located the side of exhaust air inlet cavity 3, exhaust air fan valve 9 is provided in the inside of exhaust air inlet cavity 3, heat exchange core 10 is provided in the inside of body 1, the bottom of heat exchange core 10 is communicated with new air inlet cavity 2, exhaust air inlet cavity 3 respectively, the top of heat exchange core 10 is communicated with fresh air conveying cavity 4, exhaust air output cavity 5 respectively, fresh air fan 11 is provided in 4, exhaust air fan 12 is provided in the inside of exhaust air output cavity 5, fresh air fan 11 and exhaust air fan 12 are all composed of shell and inside impeller, exhaust air output pipe 13 is communicated in the side of exhaust air output cavity 5, drive motor 14 is provided in the inside of body 1 and located the inside of exhaust air output cavity 5, drive motor 14 is high-efficiency brushless motor, a number of transmission shafts 15 are coaxially fixed on the output shaft of drive motor 14, a number of rotating shafts 17 are coaxially arranged on the impeller in the inside of exhaust air fan 12, a number of magnetic wheel groups 16 are arranged on a number of transmission shafts 15 and a number of rotating shafts 17, gear transmission mechanism 18 is provided in the inside of body 1 and located a number of transmission shafts 15, second transmission shaft 19 is connected on gear transmission mechanism 18, second rotating shaft 21 is coaxially arranged on the impeller in the inside of fresh air fan 11, second magnetic wheel group 20 is arranged on second transmission shaft 19 and second rotating shaft 21, transmission is carried out through magnetic wheel group, can reach non-contact type mute transmission, further improve the effect of noise reduction, through one drive motor 14, simultaneously make fresh air fan 11 and exhaust air fan 12 work simultaneously, to guarantee the balance of air intake and exhaust capacity, in the inside of body 1 side still be provided with silencer static pressure tank 22, fresh air high-efficiency filter 23 and evaporator 24 in proper order, wherein silencer static pressure tank 22 can further eliminate the noise in the inside of body 1, fresh air high-efficiency filter 23 can further filter the fresh air conveyed to indoor.

[0032] Further, circulation air cavity 6 is also provided in the inside of body 1, circulation air inlet pipe 27 is provided on body 1 and located circulation air cavity 6, circulation air fan 28 is provided in the inside of circulation air cavity 6, filter screen is also provided in the inside of circulation air cavity 6, circulation air fan 29 is provided on circulation air fan 28, circulation air fan 28 is composed of shell and inside impeller, the output shaft of circulation air fan 29 is coaxially connected on impeller, circulation air fan 29 is direct-current brushless motor, circulation air valve 30 is provided at the connection of circulation air cavity 6 and conveying air cavity 4, for increasing the function of fresh air system.

[0033] Further, the gear transmission mechanism 18 comprises a housing 181, a first gear 182 and a second gear 183 are arranged inside the housing 181 and mesh with each other, the first gear 182 is coaxially arranged on the first transmission shaft 15, the second gear 183 is coaxially arranged on the second transmission shaft 19, when the first transmission shaft 15 rotates in the positive direction, the second transmission shaft 19 can be driven in the reverse direction by the gear set, so that the exhaust air volume and the intake air volume are more balanced, and the use effect of the fresh air system is improved.

[0034] Further, the heat dissipation pipe 31 is arranged inside the exhaust air output chamber 5, one end of the heat dissipation pipe 31 is communicated with the housing 181, the other end of the heat dissipation pipe 31 is connected with the heat conduction pipe 32, the heat conduction pipe 32 is uniformly wound on the outer wall of the driving motor 14, one end of the heat conduction pipe 32 is communicated with the other side of the housing 181, lubricating oil is arranged inside the housing 181, the heat conduction pipe 32 and the heat dissipation pipe 31, the lubricating oil protects the mutual meshing of the first gear 182 and the second gear 183, and plays a role similar to a gear pump when the two gears rotate, so that the lubricating oil can circulate in the heat conduction pipe 32 and the heat dissipation pipe 31, the heat generated during the operation of the driving motor 14 can be transferred to the heat dissipation pipe 31, and then the heat can be taken out when the exhaust air output chamber 5 exhausts air to the outside, so that the driving motor 14 can work stably and continuously.

[0035] Further, the first magnetic wheel set 16 comprises a driving magnetic wheel 161 and a driven magnetic wheel 162, the driving magnetic wheel 161 and the driven magnetic wheel 162 are arranged vertically and staggered, and there is a gap between them, realizing contactless transmission, the driving magnetic wheel 161 is coaxially arranged on the first transmission shaft 15, the driven magnetic wheel 162 is coaxially arranged on the first rotating shaft 17, and the second magnetic wheel set 20 has the same structure as the first magnetic wheel set 16.

[0036] Further, a bypass air valve is arranged between the fresh air inlet chamber 2 and the exhaust air inlet chamber 3, which is used to improve the exhaust efficiency of the fresh air system in the bypass mode.

[0037] Further, a drain pipe 25 is arranged inside the machine body 1 and below the evaporator 24, which is used to drain the water generated during the operation of the evaporator 24, an electric control box 26 is further arranged at the bottom of the machine body 1, and mounting blocks 33 are fixedly arranged at the four corners of the machine body 1.

[0038] Figure 4A1 is the fresh air path: outdoor fresh air passes through the fresh air inlet pipe 7, fresh air filter, heat exchange core 10, fresh air conveying cavity 4 in turn, and is sent into the room through the fresh air high efficiency filter 23 and the fresh air wind cylinder 11; A2 is the exhaust air path: indoor exhaust air passes through the exhaust air inlet pipe 8, exhaust air wind valve 9, heat exchange core 10, exhaust air output cavity 5 in turn, and is discharged to the outside through the exhaust air output pipe 13 and the exhaust air wind cylinder 12; when passing through the exhaust air output cavity 5, the heat inside can be taken out, the use effect is improved, the air exchange between the indoor and outdoor is realized, and good fresh air effect is realized.

[0039] Figure 5 B1 is the fresh air path: outdoor fresh air passes through the fresh air inlet pipe 7, fresh air filter, heat exchange core 10, fresh air conveying cavity 4 in turn, and is sent into the room through the fresh air high efficiency filter 23 and the fresh air wind cylinder 11; B2 is the exhaust air path: indoor exhaust air passes through the exhaust air inlet pipe 8, exhaust air wind valve 9, heat exchange core 10, exhaust air output cavity 5 in turn, and is discharged to the outside through the exhaust air output pipe 13 and the exhaust air wind cylinder 12; B3 is the circulating air path: indoor circulating air passes through the circulating air inlet pipe 27, filter screen, circulating air cavity 6, circulating air cylinder 28 in turn, and is sent into the room after being mixed with outdoor fresh air; in this mode, the indoor and outdoor air is mixed by effectively utilizing the temperature difference between the indoor and outdoor, and the energy saving is more.

[0040] Figure 6 C1 is the fresh air path: outdoor fresh air passes through the fresh air inlet pipe 7, fresh air filter, heat exchange core 10, fresh air conveying cavity 4 in turn, and is sent into the room through the fresh air high efficiency filter 23 and the fresh air wind cylinder 11; C2 is the exhaust air path: indoor exhaust air passes through the exhaust air inlet pipe 8, exhaust air wind valve 9, heat exchange core 10, exhaust air output cavity 5 in turn, and is discharged to the outside through the exhaust air output pipe 13 and the exhaust air wind cylinder 12; C3 is the circulating air path: indoor circulating air passes through the circulating air inlet pipe 27, filter screen, circulating air cavity 6, circulating air cylinder 28, circulating air valve 30, fresh air conveying cavity 4 and fresh air wind cylinder 11 in turn, and is sent into the room after being mixed with outdoor fresh air; C4 is the bypass air path: part of the fresh air is mixed with the fresh air and sent into the room through the bypass valve, filter screen, circulating air valve 30, fresh air conveying cavity 4 and fresh air wind cylinder 11; this mode is suitable for the transition seasons of spring and autumn, the air volume passing through the heat exchange core 10 is reduced, and the air is quickly ventilated.

[0041] The implementation principle of the embodiment is: the system is based on direct-current brushless variable frequency motor driving, a first magnetic wheel set 16 is driven by a driving motor 14 and a first transmission shaft 15 to rotate the impeller of the exhaust air duct 12, and a second transmission shaft 19 is reversely driven through a gear transmission mechanism 18 to synchronously drive the impeller of the fresh air duct 11 through a second magnetic wheel set 20, so that the air inlet and exhaust air volume are balanced, the heat exchange core 10 realizes heat recovery of indoor and outdoor air, and energy loss is reduced; the system supports multiple working modes: in the fresh air mode, outdoor fresh air is filtered through the fresh air inlet cavity 2, the heat exchange core 10 and the fresh air conveying cavity 4 and then sent into the room, and indoor exhaust air is discharged through the exhaust air inlet cavity 3, the heat exchange core 10 and the exhaust air outlet cavity 5; in the mixed air mode, the circulating air cavity 6 introduces indoor air, which is mixed with fresh air and then sent into the room, so that the energy saving effect is improved; in the bypass mode, the bypass air valve is partially opened to reduce the air resistance through the heat exchange core 10, realize rapid air exchange, the noise reduction static pressure tank 22 and the magnetic drive further reduce noise, the heat dissipation system circulates the motor heat through lubricating oil to ensure stable operation.

[0042] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection", "fixing", "threading" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application by the person skilled in the art according to the specific situation.

[0044] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency, low-noise fresh air system based on a DC brushless inverter motor, comprising a body (1), characterized in that: The machine body (1) is internally provided with a fresh air inlet chamber (2), an exhaust air inlet chamber (3), a fresh air delivery chamber (4), and an exhaust air outlet chamber (5). A fresh air inlet pipe (7) is provided on the machine body (1) on one side of the fresh air inlet chamber (2), and a fresh air filter is provided inside the fresh air inlet pipe (7). An exhaust air inlet pipe (8) is provided on the machine body (1) on one side of the exhaust air inlet chamber (3), and an exhaust air valve (9) is provided inside the exhaust air inlet chamber (3). The body (1) is equipped with a heat exchange core (10). The bottom of the heat exchange core (10) is connected to the fresh air inlet chamber (2) and the exhaust air inlet chamber (3), respectively. The top of the heat exchange core (10) is connected to the fresh air delivery chamber (4) and the exhaust air outlet chamber (5), respectively. A fresh air duct (11) is installed inside the (4) chamber, and an exhaust air duct (12) is installed inside the exhaust air outlet chamber (5). Both the fresh air duct (11) and the exhaust air duct (12) are composed of an outer shell and an internal impeller. An exhaust outlet pipe (13) is connected to one side of the exhaust outlet chamber (5). A drive motor (14) is installed inside the body (1) and inside the exhaust outlet chamber (5). A transmission shaft (15) is coaxially fixed on the output shaft of the drive motor (14). A rotating shaft (17) is coaxially installed on the impeller inside the exhaust duct (12). A magnetic wheel assembly (16) is installed on the transmission shaft (15) and the rotating shaft (17). A gear transmission mechanism (18) is provided on the first transmission shaft (15), and a second transmission shaft (19) is connected to the gear transmission mechanism (18). A second rotating shaft (21) is coaxially provided on the impeller inside the fresh air duct (11). A second magnetic wheel set (20) is provided on the second transmission shaft (19) and the second rotating shaft (21). A silencer static pressure box (22), a fresh air high-efficiency filter (23) and an evaporator (24) are also provided in sequence on one side of the inside of the body (1).

2. The high-efficiency, low-noise fresh air system based on a DC brushless inverter motor according to claim 1, characterized in that: The machine body (1) is also provided with a circulating air chamber (6). A circulating air inlet pipe (27) is provided on the machine body (1) and located at the circulating air chamber (6). A circulating air duct (28) is provided inside the circulating air chamber (6). A circulating fan (29) is provided on the circulating air duct (28). The circulating air duct (28) is composed of an outer shell and an internal impeller. The output shaft of the circulating fan (29) is coaxially connected to the impeller. A circulating air valve (30) is provided at the connection between the circulating air chamber (6) and the conveying air chamber (4).

3. The high-efficiency, low-noise fresh air system based on a DC brushless inverter motor according to claim 1, characterized in that: The gear transmission mechanism (18) includes a housing (181), inside which a first gear (182) and a second gear (183) mesh with each other. The first gear (182) is coaxially mounted on the first transmission shaft (15), and the second gear (183) is coaxially mounted on the second transmission shaft (19).

4. The high-efficiency, low-noise fresh air system based on a DC brushless inverter motor according to claim 3, characterized in that: The exhaust outlet cavity (5) is also provided with a heat dissipation pipe (31). One end of the heat dissipation pipe (31) is connected to the housing (181), and the other end of the heat dissipation pipe (31) is connected to a heat conduction pipe (32). The heat conduction pipe (32) is evenly wound around the outer wall of the drive motor (14). One end of the heat conduction pipe (32) is connected to the other side of the housing (181). Lubricating oil is provided inside the housing (181), the heat conduction pipe (32), and the heat dissipation pipe (31).

5. The high-efficiency, low-noise fresh air system based on a DC brushless inverter motor according to claim 1, characterized in that: The first magnetic wheel group (16) includes an active magnetic wheel (161) and a passive magnetic wheel (162). The active magnetic wheel (161) and the passive magnetic wheel (162) are arranged perpendicularly and alternately. The active magnetic wheel (161) is coaxially mounted on the first transmission shaft (15), and the passive magnetic wheel (162) is coaxially mounted on the first rotating shaft (17). The second magnetic wheel group (20) has the same structure as the first magnetic wheel group (16).

6. The high-efficiency, low-noise fresh air system based on a DC brushless inverter motor according to claim 1, characterized in that: A bypass ventilation valve is provided between the fresh air inlet chamber (2) and the exhaust air inlet chamber (3).

7. The high-efficiency, low-noise fresh air system based on a brushless DC inverter motor according to claim 1, characterized in that: A drain pipe (25) is provided inside the body (1) and below the evaporator (24). An electrical control box (26) is also provided at the bottom of the body (1). Mounting blocks (33) are fixedly provided at the four corners of the exterior of the body (1).

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