CN118783694A - A heat dissipation system for a motor group - Google Patents

Abstract

The invention relates to the technical field of heat dissipation systems, in particular to a heat dissipation system of a motor group, which comprises: the air storage tank, the one end of being responsible for of giving vent to anger is connected at the top of gas storage tank, the side of the other end of being responsible for of giving vent to anger links to each other with cooling blower through governing valve, cooling intake pipe, cooling blower installs one side at the radiator housing, and the other side of radiator housing installs the fan of giving vent to anger, and the fan of giving vent to anger passes through the one end of cooling duct, first compressor connection cooling tube, and the other end of cooling tube passes through the second compressor and links to each other with the one end of intake pipe, the other end of intake pipe links to each other with the side of the one end of being responsible for of admitting air, the other end of being responsible for of admitting air passes through the admission valve and links to each other with the top of gas storage tank, through setting up the radiator housing, makes the inside low temperature environment that is in all the time to the motor is whole, improves the cooling effect to through setting up two compressors and cooling tube, can effectively reduce running environment temperature, and then improve the life of device.

Description

A heat dissipation system for a motor group

Technical Field

The present invention relates to the technical field of heat dissipation systems, and in particular to a heat dissipation system for a motor group.

Background Art

An electric motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. It is divided into electric motors (symbolized by M) and generators (symbolized by G). In order to improve production efficiency during the production process, multiple motors are combined to form a motor group for use.

The motor unit will generate a large amount of heat during operation. Due to changes in the working environment and working conditions, the heat generated will also change accordingly. In order to maintain the normal operation of the unit, various coolers or heat exchangers are usually used to keep each device within the normal temperature working range.

Traditional cooling systems usually use one/multiple external blowers/compressors/hair dryers for cooling. During use, the total air volume and air volume distribution mode cannot be adjusted. The actual operating conditions of the motor unit are very complex, and it is often necessary to undertake peak-shaving and frequency regulation tasks. The proportion of full-load operating hours throughout the year accounts for a small proportion of the annual operating hours. Especially in high-altitude areas, the natural environment and operating conditions are more complex. In order to ensure the cooling effect and make sure that the temperature rise of components such as stator bars and pole coils does not exceed the limit under the worst operating conditions, and to ensure the safe operation of the unit, there is usually a large design redundancy, which will increase the ventilation loss of the unit and reduce the efficiency of the motor unit. If the design redundancy is reduced, the local temperature of the components will be too high. In addition, the existing cooling system has the following technical problems:

1. High failure rate---due to the high operating temperature of the external blower/compressor/hair dryer used for cooling.

2. Poor cooling effect---the efficiency of external blowers/compressors/hair dryers is low, resulting in high cooling air temperature, causing the overall temperature of the cooled object (motor, shaft, bearing) to be high.

Therefore, it is necessary to provide a heat dissipation system for a motor group to solve the above technical problems.

Summary of the invention

In order to solve the above technical problems, the present invention provides a heat dissipation system for a motor group.

The heat dissipation system of a motor group provided by the present invention comprises: an air storage tank, the top of the air storage tank is connected to one end of an air outlet main pipe, the side of the other end of the air outlet main pipe is connected to one end of a cooling air inlet pipe through a regulating valve, the number of the cooling air inlet pipes is multiple, the other end of the cooling air inlet pipe is connected to a cooling fan, the cooling fan is installed on one side of a heat dissipation shell, and an air outlet fan is installed on the other side of the heat dissipation shell, the air outlet fan is connected to one end of a first compressor through the cooling outlet pipe, the air outlet end of the first compressor is connected to one end of the heat dissipation pipe, the other end of the heat dissipation pipe is connected to the air inlet end of a second compressor, the air outlet end of the second compressor is connected to one end of the air inlet pipe, the other end of the air inlet pipe is connected to the side of one end of the air inlet main pipe, the other end of the air inlet main pipe is connected to the top of the air storage tank through an air inlet valve, and the first compressor and the second compressor are respectively placed on the top of a first placement rack and a second placement rack.

Preferably, the heat dissipation shell includes a lower shell and an upper cover plate, the top of the lower shell is provided with a plurality of lower screw holes, the bottom of the upper cover plate is provided with upper screw holes matching with the lower screw holes, the lower screw holes and the upper screw holes are connected by bolts, the top of the lower shell is provided with a connecting groove, the top of the upper cover plate is provided with a connecting plate matching with the connecting groove, and the connecting groove is located on the inner side of the rectangle surrounded by the lower screw holes.

Preferably, a temperature sensor is installed inside the heat dissipation shell, and the temperature sensor is electrically connected to the control box. A first solenoid valve is installed at the connection between the cooling air inlet pipe and the cooling fan, and a second solenoid valve is installed between the exhaust fan and the cooling air outlet pipe. The first solenoid valve and the second solenoid valve are electrically connected to the control box.

Preferably, a heat insulating layer made of a heat insulating material is bonded to the inner wall of the heat dissipation housing.

It should be noted that by providing a heat insulating layer, the heat exchange between the inside of the heat dissipation housing and the outside can be reduced during use, thereby improving the cooling effect inside the heat dissipation housing.

Preferably, the heat dissipation pipe is in a spiral shape and is wound around the outer surface of the heat dissipation housing.

Preferably, a cooling pipe is sleeved on the outer wall of the heat dissipation pipe, and the cooling pipe is a hollow structure. The two sides of the cooling pipe are respectively connected to a cooling upper water pipe and a cooling water outlet pipe. The cooling upper water pipe is connected to the tap water pipe through a third solenoid valve, and the cooling water outlet pipe is connected to a recovery box through a fourth solenoid valve.

Preferably, a connecting ring is sleeved on the outer surface of the gas storage tank, and the connecting ring is threadedly connected to the outer cylinder body. The upper end and the lower end of the outer surface of the outer cylinder body are respectively connected to an external water inlet pipe and an external water outlet pipe. The external water inlet pipe is connected to the cold water tank through a fifth solenoid valve, and the external water outlet pipe is connected to an external recovery pipe through a sixth solenoid valve.

Preferably, a plurality of second temperature sensors are installed inside the gas storage tank, the second temperature sensors are electrically connected to a control box, and the control box is electrically connected to the fifth solenoid valve and the sixth solenoid valve.

Preferably, the gas storage tank is made of metal, the outer cylinder is made of plastic, and the outer surface of the outer cylinder is sprayed with an external heat-insulating coating.

Preferably, a first mounting hole and a second mounting hole are respectively provided on the top of the first placement rack and the second placement rack, a first fan is installed inside the first mounting hole, and a second fan is installed inside the second mounting hole.

Compared with the related art, the heat dissipation system of a motor group provided by the present invention has the following beneficial effects:

1. The present invention can store the cooled gas in the gas tank by setting up a gas tank. When cooling is needed, the cooling fan and the regulating valve can be started to suck the cold air in the gas tank through the negative pressure generated by the rotation of the cooling fan, and the cold air enters the heat dissipation shell to reduce the temperature in the heat dissipation shell. By setting up an exhaust fan, the gas that has absorbed heat can be discharged through the exhaust fan. At the same time, the intake fan can be started to send new cold air from the gas tank into the heat dissipation shell. By setting up a first compressor and a second compressor, the heat-absorbing gas can be compressed and released through double-layer compression of the compressor. By setting up a heat dissipation pipe, the heat exchange of the gas compressed for the first time can be carried out with the outside air, thereby improving the heat dissipation efficiency. By setting up an intake pipe and an intake main pipe, the air that has been cooled can be sent into the gas tank for subsequent use.

2. The present invention sets a heat dissipation housing so that the interior of the housing is always in a low-temperature environment, which can cool the motor as a whole and improve the cooling effect. In addition, by setting a dual compressor and a heat dissipation pipe, the operating environment temperature can be effectively reduced, thereby increasing the service life of the device;

3. The present invention can monitor the interior of the heat dissipation shell in real time by setting a temperature sensor. When the temperature is higher than the set temperature, the first solenoid valve can be opened to allow cold air to enter the heat dissipation shell. After a period of use, when the temperature is higher than the set temperature again, the second solenoid valve is opened first to discharge the gas after absorbing heat, and then the first solenoid valve is opened to allow cold air to enter the heat dissipation shell, so that the internal temperature of the heat dissipation shell is always maintained within a certain temperature range, thereby improving the refrigeration effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a preferred embodiment of a heat dissipation system for a motor group provided by the present invention;

FIG2 is a schematic diagram of the structure of a heat dissipation system of a motor group shown in FIG1 from a left perspective;

FIG3 is a schematic structural diagram of the cooling fan shown in FIG1 ;

FIG4 is a schematic structural diagram of the air outlet fan shown in FIG1 ;

FIG5 is a schematic diagram of the structure of the lower housing and the upper cover shown in FIG1 ;

Numbers in the figure: 1, gas tank; 2, connecting ring; 3, outer cylinder; 4, outer water inlet pipe; 5, fifth solenoid valve; 6, outer water pipe; 7, sixth solenoid valve; 8, outlet pipe; 9, inlet pipe; 10, cooling inlet pipe; 11, first solenoid valve; 12, heat dissipation shell; 13, regulating valve; 14, cooling outlet pipe; 15, first compressor; 16, second compressor; 17, fourth solenoid valve; 18, cooling outlet pipe; 19, recovery box; 20, heat dissipation Heat pipe; 21. Cooling pipe; 22. Cooling water pipe; 23. Third solenoid valve; 24. First placement rack; 25. First mounting hole; 26. Second placement rack; 27. Second mounting hole; 28. First fan; 29. Second fan; 30. Exhaust fan; 31. Cooling fan; 32. Temperature sensor; 33. Second solenoid valve; 34. Lower shell; 35. Upper cover; 36. Lower screw hole; 37. Connecting groove; 38. Upper screw hole; 39. Connecting plate.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

Referring to Figures 1 to 5, a heat dissipation system of a motor group provided by the present invention comprises: an air storage tank 1, the top of the air storage tank 1 is connected to one end of an air outlet pipe 8, the side of the other end of the air outlet pipe 8 is connected to one end of a cooling air intake pipe 10 through a regulating valve 13, the number of the cooling air intake pipes 10 is multiple, the other end of the cooling air intake pipe 10 is connected to a cooling fan 31, the cooling fan 31 is installed on one side of a heat dissipation housing 12, the other side of the heat dissipation housing 12 is installed with an air outlet fan 30, the air outlet fan 30 is connected to one end of a first compressor 15 through a cooling air outlet pipe 14 The outlet end of the first compressor 15 is connected to one end of the heat dissipation pipe 20, and the other end of the heat dissipation pipe 20 is connected to the inlet end of the second compressor 16. The outlet end of the second compressor 16 is connected to one end of the inlet pipe, and the other end of the inlet pipe is connected to the side of one end of the inlet main pipe 9. The other end of the inlet main pipe 9 is connected to the top of the air storage tank 1 through the inlet valve. The first compressor 15 and the second compressor 16 are respectively placed on the top of the first placement rack 24 and the second placement rack 26, and the bottoms of the first placement rack 24 and the second placement rack 26 are respectively connected to the two ends of the top of the heat dissipation shell 12.

In an embodiment of the present invention, as shown in reference figure 1, the heat dissipation shell 12 includes a lower shell 34 and an upper cover plate 35, the top of the lower shell 34 is provided with a plurality of lower screw holes 36, the bottom of the upper cover plate 35 is provided with upper screw holes 38 that cooperate with the lower screw holes 36, the lower screw holes 36 and the upper screw holes 38 are connected by bolts, the top of the lower shell 34 is provided with a connecting groove 37, the top of the upper cover plate 35 is provided with a connecting plate 39 that cooperates with the connecting groove 37, and the connecting groove 37 is located on the inner side of the rectangle surrounded by the lower screw holes 36.

It should be noted that the heat dissipation shell 12 is configured as a lower shell 34 and an upper cover plate 35, and the lower shell 34 and the upper cover plate 35 are configured in a movably connected form. When in use, it is convenient to place the motor inside the heat dissipation shell 12, and when the motor is damaged later, the motor can be removed from the heat dissipation shell 12 by removing the bolts, which facilitates the maintenance of the motor. In addition, through the cooperation of the connecting groove 37 and the connecting plate 39, when cold air is delivered into the heat dissipation shell 12 during use, the connecting groove 37 and the connecting plate 39 can effectively improve the sealing of the connection between them to prevent cooling overflow and affect the refrigeration effect.

It should also be noted that by setting up the gas storage tank 1, the cooled gas can be stored in the gas storage tank 1. When cooling is required, the cooling fan 31 and the regulating valve 13 can be started, and the negative pressure generated by the rotation of the cooling fan 31 can be used to suck the cold air in the gas storage tank 1, and the cold air enters the heat dissipation shell 12 to reduce the temperature in the heat dissipation shell 12. By setting up the exhaust fan 30, the gas that has absorbed heat can be discharged through the exhaust fan 30, and at the same time, the cooling fan 31 can be started to send new cold air from the gas storage tank 1 to the heat dissipation shell 12. By setting up the first compressor 15 and the second compressor 16, the heat-absorbing gas can be compressed and released through the double-layer compression of the compressor. By setting up the heat dissipation pipe 20, the outside air can be used to exchange heat with the gas compressed for the first time to improve the heat dissipation efficiency. By setting up the air intake pipe and the air intake main pipe 9, the air after heat dissipation can be sent to the gas storage tank 1 for subsequent use.

Finally, it should be noted that by providing a heat dissipation shell 12, the interior of the heat dissipation shell 12 is always in a low-temperature environment, and when the motor is running, the rotor inside it rotates, and the cold air inside the heat dissipation shell 12 can be sucked into the motor, which can cool the shaft, rotor and bearing inside the motor, thereby achieving cooling of the entire motor and improving the cooling effect. In addition, by providing dual compressors and heat dissipation pipes 20, the cold air after absorbing heat can be dissipated in sections to prevent excessive heat release from the air when a single compressor is dissipating heat, resulting in a high ambient temperature of the compressor, which affects the service life of the first compressor 15 or the second compressor 16.

In an embodiment of the present invention, referring to Figures 3 and 4, a temperature sensor 32 is installed inside the heat dissipation shell 12, and the temperature sensor is electrically connected to the control box. A first solenoid valve 11 is installed at the connection between the cooling air inlet pipe 10 and the cooling fan 31, and a second solenoid valve 33 is installed between the air outlet fan 30 and the cooling air outlet pipe 14. The first solenoid valve 11 and the second solenoid valve 33 are electrically connected to the control box.

It should be noted that: by setting the temperature sensor 32, the interior of the heat dissipation housing 12 can be monitored in real time through the temperature sensor 32, and the first solenoid valve 11 and the second solenoid valve 33 can be opened and closed through the control hole according to the monitored temperature, and controlled in real time;

When initially used, the first solenoid valve 11 can be opened to allow cold air to flow into the heat dissipation housing 12. At this time, the temperature inside the heat dissipation housing 12 begins to decrease due to the cold air. When the temperature drops to a set low temperature, the first solenoid valve 11 is closed. At this time, both ends of the heat dissipation housing 12 are closed to form a sealed space.

After the motor has been used for a period of time, the temperature in the enclosed space gradually rises as the motor dissipates heat to the outside during use. When the temperature sensor 32 detects that the temperature inside the heat dissipation housing 12 is higher than the set high temperature, the second solenoid valve 33 is opened first to discharge the heat-absorbed gas, and then the first solenoid valve 11 is opened to send cold air into the heat dissipation housing 12, so that the temperature inside the heat dissipation housing 12 is always maintained within a certain temperature range, thereby improving the refrigeration effect.

In the embodiment of the present invention, a heat insulating layer made of a heat insulating material is bonded to the inner wall of the heat dissipation housing 12 .

It should be noted that by providing a heat insulating layer, the heat exchange between the inside of the heat dissipation housing 12 and the outside can be reduced during use, thereby improving the cooling effect inside the heat dissipation housing 12 .

The thermal insulation material can be sponge rubber, which is a porous material with holes all over the material. It can be divided into open holes, closed holes, mixed holes and micro holes. It can be made into soft rubber or hard rubber products. It is light, soft, elastic and not easy to conduct heat. It has the functions of shockproof, impact mitigation, heat insulation and sound insulation. While performing heat insulation, it can also reduce vibration and separate oil, improving the quality of the surrounding environment during the operation of the motor.

In an embodiment of the present invention, referring to FIG. 1 , the heat dissipation pipe 20 is in a spiral shape, and the heat dissipation pipe 20 is wound around the outer surface of the heat dissipation housing 12 .

In an embodiment of the present invention, referring to Figures 1 and 2, a cooling pipe 21 is sleeved on the outer wall of the heat dissipation pipe 20, the length of the cooling pipe 21 is less than the length of the heat dissipation pipe 20, the cooling pipe 21 is a hollow structure, and the two side surfaces of the cooling pipe 21 are respectively connected to a cooling water upper pipe 22 and a cooling water outlet pipe 18, the cooling water upper pipe 22 is connected to the tap water pipe through a third solenoid valve 23, and the cooling water outlet pipe 18 is connected to a recovery box 19 through a fourth solenoid valve 17.

It should be noted that: by setting a spiral heat dissipation pipe 20, the travel distance of the heat dissipation pipe 20 is increased without increasing the width, thereby improving the heat dissipation effect on the gas, and by setting a cooling pipe 21, external tap water in the cooling pipe 21 can be used, and the water temperature of the tap water is between 15-25°C. Through water cooling with tap water, the heat dissipation effect on the gas can be further improved.

In an embodiment of the present invention, as shown in reference figure 1, a connecting ring 2 is sleeved on the outer surface of the gas storage tank 1, and the connecting ring 2 is threadedly connected to the outer cylinder 3. The upper end and the lower end of the outer surface of the outer cylinder 3 are respectively connected to an external water inlet pipe 4 and an external water outlet pipe 6. The external water inlet pipe 4 is connected to the cold water tank through a fifth solenoid valve 5, and the external water outlet pipe 6 is connected to an external recovery pipe through a sixth solenoid valve 7.

In an embodiment of the present invention, a plurality of second temperature sensors are installed inside the gas storage tank 1 , and the second temperature sensors are electrically connected to a control box, and the control box is electrically connected to the fifth solenoid valve 5 and the sixth solenoid valve 7 .

In an embodiment of the present invention, referring to FIG. 1 , the gas storage tank 1 is made of metal, the outer cylinder 3 is made of plastic, and the outer surface of the outer cylinder 3 is sprayed with an outer heat-insulating coating.

It should be noted that: the water temperature stored in the cold water tank is controlled to be less than or equal to 5°C, and by setting the outer cylinder 3 and the second temperature sensor, the interior of the gas storage pipe is monitored in real time through the second temperature sensor, and the monitoring result is transmitted to the control box, and the control of the fifth solenoid valve 5 and the sixth solenoid valve 7 is realized through the control box. When the temperature of the second temperature sensor monitors that the temperature in the gas storage tank 1 is higher than the set high temperature, the fifth solenoid valve 5 can be opened, and cooling water can be added to the hollow cavity of the outer cylinder 3. The heat absorption of the cooling water can quickly cool the interior of the gas storage tank 1, and the temperature in the gas storage tank 1 is always maintained at A constant temperature is provided to facilitate the subsequent use of cooling the motor. When the temperature of the second temperature sensor monitors that the temperature in the gas storage pipe is higher than the set high temperature again, it means that at this time, the temperature of the cooling water can no longer lower the temperature in the gas storage tank 1. At this time, the cooling water absorbs heat, and the temperature rise cannot meet subsequent needs. Therefore, first, the sixth solenoid valve 7 is opened through the control box to discharge the cooling water after absorbing heat. After the cooling water is discharged, the fifth solenoid valve 5 can be opened again through the control box to add cooling water to the hollow cavity of the outer cylinder 3. The heat absorption of the cooling water can quickly cool the inside of the gas storage tank 1.

It should also be noted that by setting the material of the gas storage tank 1 to be metal, the good thermal conductivity of the metal material is utilized to improve the heat exchange efficiency between the gas storage tank 1 and the cooling water located inside the outer cylinder 3, and by setting the outer cylinder 3 to be plastic, the poor thermal conductivity of the plastic material can be utilized to reduce the heat exchange efficiency between the outer cylinder 3 and the outside world, thereby preventing the cooling water located inside the outer cylinder 3 from being affected by the outside world and rapidly heating up, and by using the external thermal insulation coating, the heat exchange efficiency between the outer cylinder 3 and the outside world is further reduced.

In an embodiment of the present invention, as shown in FIG2 , a first mounting hole 25 and a second mounting hole 27 are respectively provided at the top of the first placement rack 24 and the second placement rack 26 , a first fan 28 is installed inside the first mounting hole 25 , and a second fan 29 is installed inside the second mounting hole 27 .

It should be noted that by providing the first fan 28 and the second fan 29, air can be blown to dissipate heat for the first compressor 15 and the second compressor 16 during use, thereby preventing the first compressor 15 and the second compressor 16 from being overheated and thus being damaged.

The working principle of the heat dissipation system of a motor group provided by the present invention is as follows:

When in use, the motor can be placed inside the heat dissipation shell 12. By setting up the gas storage tank 1, the cooled gas can be stored in the gas storage tank 1. When cooling is needed, the cooling fan 31 and the regulating valve 13 can be started, and the negative pressure generated by the rotation of the cooling fan 31 can be used to suck the cold air in the gas storage tank 1, and the cold air enters the heat dissipation shell 12 to reduce the temperature in the heat dissipation shell 12. By setting up the exhaust fan 30, the gas that has absorbed heat can be discharged through the exhaust fan 30. At the same time, the cooling fan 31 can be started to send new cold air from the gas storage tank 1 to the heat dissipation shell 12. By setting up the first compressor 15 and the second compressor 16, the heat-absorbing gas can be compressed and released through the double-layer compression of the compressor. By setting up the heat dissipation pipe 20, the outside air can be used to exchange heat with the gas compressed for the first time, thereby improving the heat dissipation efficiency. By setting up the air intake pipe and the air intake main pipe 9, the air after heat dissipation can be sent into the gas storage tank 1 for subsequent use.

The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims (9)

1. A heat dissipation system for an electric machine, comprising: the air storage tank (1), the top of air storage tank (1) is connected the one end of being responsible for (8) of giving vent to anger, the one end of cooling intake pipe (10) is connected through governing valve (13) to the side of the other end of being responsible for (8) of giving vent to anger, the quantity of cooling intake pipe (10) is a plurality of, the other end of cooling intake pipe (10) links to each other with cooling fan (31), cooling fan (31) are installed in one side of heat dissipation casing (12), the other side of heat dissipation casing (12) is installed and is given vent to anger fan (30), the one end of first compressor (15) is connected through cooling outlet duct (14), the one end of cooling pipe (20) is connected to the end of giving vent to anger of first compressor (15), the other end of cooling pipe (20) links to each other with the inlet end of second compressor (16), the end of giving vent to anger of second compressor (16) links to each other with the one end of intake pipe, the other with the side of being responsible for (9) one end of air inlet pipe links to each other, the other with the air inlet valve (9) other through cooling outlet duct (14) and be responsible for (1) one end of air inlet valve, the first compressor (26) is placed at the top of first compressor (24) and second compressor (24) respectively, the bottoms of the first placing frame (24) and the second placing frame (26) are respectively connected with two ends of the top of the heat dissipation shell (12).

2. The heat dissipation system of a motor unit according to claim 1, wherein the heat dissipation housing (12) comprises a lower housing (34) and an upper cover plate (35), a plurality of lower screw holes (36) are formed in the top of the lower housing (34), an upper screw hole (38) matched with the lower screw hole (36) is formed in the bottom of the upper cover plate (35), the lower screw hole (36) is connected with the upper screw hole (38) through a bolt, a connecting groove (37) is formed in the top of the lower housing (34), a connecting plate (39) matched with the connecting groove (37) is arranged in the top of the upper cover plate (35), and the connecting groove (37) is located on the inner side of a rectangle surrounded by the lower screw hole (36).

3. The heat dissipation system of a motor unit according to claim 1, wherein a temperature sensor (32) is installed inside the heat dissipation housing (12), the temperature sensor is electrically connected with the control box, a first electromagnetic valve (11) is installed at a joint of the cooling air inlet pipe (10) and the cooling air blower (31), a second electromagnetic valve (33) is installed between the air outlet air blower (30) and the cooling air outlet pipe (14), the first electromagnetic valve (11) and the second electromagnetic valve (33) are electrically connected with the control box, and a heat insulation layer made of heat insulation materials is adhered on the inner wall of the heat dissipation housing (12).

4. A heat dissipating system of an electric machine set according to claim 1, characterized in that the heat dissipating tube (20) is in the shape of a spiral, said heat dissipating tube (20) being wound on the outer surface of the heat dissipating housing (12).

5. The heat dissipation system of a motor unit according to claim 4, wherein the outer wall of the heat dissipation tube (20) is sleeved with a cooling tube (21), the length of the cooling tube (21) is smaller than that of the heat dissipation tube (20), the cooling tube (21) is of a hollow structure, two side surfaces of the cooling tube (21) are respectively connected with a cooling water supply tube (22) and a cooling water outlet tube (18), the cooling water supply tube (22) is connected with a tap water tube through a third electromagnetic valve (23), and the cooling water outlet tube (18) is connected with a recovery box (19) through a fourth electromagnetic valve (17).

6. The heat dissipation system of a motor unit according to claim 1, wherein the outer surface of the air storage tank (1) is sleeved with a connecting ring (2), the connecting ring (2) is in threaded connection with the outer cylinder (3), the upper end and the lower end of the outer surface of the outer cylinder (3) are respectively connected with an outer water inlet pipe (4) and an outer water outlet pipe (6), the outer water inlet pipe (4) is connected with a cold water tank through a fifth electromagnetic valve (5), and the outer water outlet pipe (6) is connected with an outer recovery pipe through a sixth electromagnetic valve (7).

7. The heat dissipation system of a motor unit according to claim 6, wherein a plurality of second temperature sensors are installed inside the air storage tank (1), the second temperature sensors are electrically connected to a control box, and the control box is electrically connected to a fifth electromagnetic valve (5) and a sixth electromagnetic valve (7).

8. The heat dissipation system of a motor unit according to claim 7, wherein the air storage tank (1) is made of metal, the outer cylinder (3) is made of plastic, and an outer heat-insulating coating is sprayed on the outer surface of the outer cylinder (3).

9. The heat dissipation system of a motor unit according to claim 1, wherein the top parts of the first placing frame (24) and the second placing frame (26) are respectively provided with a first mounting hole (25) and a second mounting hole (27), a first fan (28) is mounted in the first mounting hole (25), and a second fan (29) is mounted in the second mounting hole (27).