A motor for a car washer with dual air and water cooling

Abstract

The present invention discloses a motor for a car washer with air and water double cooling, belonging to the field of electric motors. A motor for a car washer with air and water double cooling includes a vertically arranged housing, a rotating shaft located inside the housing, a rotor sleeved outside the rotating shaft, and a stator wound outside the rotor and located inside the housing. The housing is provided with an inlet and an outlet communicating with the internal cavity; the motor further includes an air suction fan, which is fixedly connected coaxially with the rotating shaft and located outside the housing to suck water-containing air into the housing from the inlet; an air cooling unit, which is fixedly arranged on the inner wall of the housing, and is annularly arranged outside the stator and abuts against the outer wall of the stator. The air inlet of the air cooling unit is indirectly communicated with the inlet; it can realize the cooling of both the stator and the rotor, and the air gap is not easily reduced due to the heating of the rotating shaft.

Description

Technical Field

[0001] The present invention belongs to the field of electric motors, and more specifically, relates to an electric motor for a car washer with air-water double cooling. Background Art

[0002] An electric motor is a device that converts electrical energy into mechanical energy. However, the conversion rate of electrical energy and mechanical energy is not 100%. The lost electrical energy is radiated outward in the form of heat. Therefore, the electric motor needs to be cooled, and generally air cooling or air-cooling is used.

[0003] There is a water-cooling structure for a partitioned permanent magnet motor with the existing patent number CN202010945415.1, which wraps cooling water pipes outside the rotor to improve the cooling speed of the rotor. However, since there are design requirements for the air gap between the rotor and the stator, the above setting method undoubtedly increases the air gap and easily causes faults in the electric motor.

[0004] Generally, the air gap of a small asynchronous motor is about between 0.25 and 1.5 mm, and that of a medium-sized asynchronous motor is about between 0.75 and 2 mm. The air gap is to ensure that the rotor can rotate freely in the stator cavity. The size of the air gap has a great influence on the performance and operation reliability of the asynchronous motor. In order to reduce the exciting current and power factor, the air gap should be minimized as much as possible. However, if the air gap is too small, it will have the opposite effect, increasing the air gap harmonic field, increasing the stray losses and noise of the electric motor, and reducing both the maximum torque and the starting torque. At the same time, if the air gap is too small, it is also easy for the rotor and the stator to rub against each other during operation, resulting in the phenomenon of "sweeping the chamber", which brings difficulties to starting and thus reduces the operation reliability. In addition, it also brings difficulties to assembly. In addition, the consequences of too large a gap between the stator and the rotor of the motor: if the gap is too large, the magnetic resistance will increase, the exciting loss will increase, the exciting current will increase accordingly, and the power factor of the motor will also decrease, deteriorating the performance of the motor.

[0005] Since the order of magnitude of the air gap of a general motor is relatively small, the cooling pipeline needs to be avoided from the air gap as much as possible. In addition, the stator, as the component that generates the magnetic field in the electric motor, also needs to be cooled to avoid heat interfering with the magnetic field strength. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an electric motor for a car washer with air-water double cooling, which can cool both the stator and the rotor, and the air gap is not easily reduced due to the heat of the rotating shaft.

[0007] An electric motor for a car washer with air-water double cooling of the present invention includes a vertically arranged housing, a rotating shaft located inside the housing, a rotor sleeved outside the rotating shaft, and a stator wound outside the rotor and located inside the housing. The housing is provided with an inlet and an outlet communicating with the internal cavity. The motor further includes

[0008] An intake fan, fixedly connected coaxially with a rotating shaft and located outside the machine housing to suck water-containing air into the machine housing from an inlet;

[0009] An air cooling unit, fixedly arranged on the inner wall of the machine housing, and annularly arranged outside the stator and abutted against the outer wall of the stator. The air inlet of the air cooling unit is indirectly communicated with the inlet; and

[0010] A water cooling unit, fixedly arranged between the rotating shaft and the rotor, and abutted against the inner wall of the rotor. The water inlet of the water cooling unit is indirectly communicated with the inlet. The moisture in the water-containing air is separated at the water inlet and only enters the water inlet. The water outlet of the water cooling unit is normally closed and has an opening threshold, and the water outlet is subject to the water pressure of the cooling water in the water cooling unit.

[0011] As a further improvement of the present invention, the water cooling unit includes a separation module, a water collection module, and a water outlet module distributed from top to bottom; the separation module is the water inlet of the water cooling unit; the separation module includes an elastic film in a bowl shape made of an elastic material. When the motor starts, the inner side of the elastic film is impacted by the water-containing air and deforms downward to form a groove for accumulating water; the groove is communicated with the water collection module. When the water level line in the groove is higher than the upper end of the groove, the water in the groove enters the water collection module; the water outlet module is the water outlet of the water cooling unit.

[0012] As a further improvement of the present invention, the water outlet module includes an inner ring and an outer ring; both the outer ring and the inner ring are made of the same kind of elastic film; the inner wall of the outer ring bends downward, the inner wall of the inner ring bends downward, the inner wall of the outer ring and the outer wall of the inner ring are attached and abutted, and the contact structure of the inner wall of the outer ring and the outer wall of the inner ring forms a one-way channel; the flow direction of the one-way channel is from top to bottom; the water volume corresponding to the opening threshold of the one-way channel is that the water level line in the water collection module is higher than the height where the rotor is located.

[0013] As a further improvement of the present invention, the water collection module includes an inner tube and an outer tube; the inner tube is made of an elastic material having the ability to deform in the radial direction, and the inner tube is fixedly connected to the outer side wall of the rotating shaft; the outer tube is made of a rigid material, and the outer tube is fixedly connected to the inner side wall of the rotor; the gap between the inner tube and the outer tube is a water chamber for storing cooling water; the water in the water chamber is provided by the water accumulated and deformed in the groove.

[0014] As a further improvement of the present invention, a deformation through-ring is fixedly arranged in the water chamber to support the outer tube and the inner tube to maintain the gap; the deformation through-ring is at least made of an elastic material having the ability to deform in the radial direction to compensate for the expansion of the rotating shaft after heating; the inner diameter of the deformation through-ring decreases and the outer diameter remains unchanged after deformation; the deformation of the deformation through-ring is synchronized with the expansion deformation of the rotating shaft.

[0015] As a further improvement of the present invention, the deformation through-ring includes a ring body and a shape memory metal sheet; the ring body is made of an elastic or flexible material, and the ring body is provided with a water through-hole penetrating the upper and lower sides; the water through-hole remains open in a deformed state or a free state; there are multiple shape memory metal sheets, which are evenly embedded inside the ring body; the shape memory metal sheets are straight in a free state and bent in a temperature environment above or equal to the deformation temperature threshold.

[0016] As a further improvement of the present invention, the air-cooling unit includes an air intake module, a gas collection module, and an air outlet module distributed from top to bottom; the air intake module is the air inlet of the air-cooling unit, and the air inlet is located above the water-cooling unit to obtain dehydrated air; the gas collection module includes at least one trachea arranged in a spiral shape, and the trachea arranged in a spiral shape surrounds and abuts against the outside of the stator and is fixedly connected between the inner wall of the machine shell and the outer wall of the stator; the air outlet module is the air outlet of the air-cooling unit.

[0017] As a further improvement of the present invention, the air intake module includes at least one trachea arranged in a spiral shape and having a draft angle; the trachea arranged in a spiral shape and having a draft angle is wound around the outside of the water inlet of the water-cooling unit to receive the components at the water inlet of the water-cooling unit.

[0018] As a further improvement of the present invention, the air outlet module includes at least one air pipe whose air outlet direction faces the water outlet of the water-cooling unit.

[0019] As a further improvement of the present invention, the machine shell includes an upper end cover, a shell body, and a lower end cover distributed from top to bottom; the upper end cover and the shell body, and the shell body and the lower end cover are detachably connected; the air-cooling unit is fixedly arranged inside the shell body.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] By setting an air-cooling unit and a water-cooling unit, the present invention cools the stator and the rotor respectively. The cooling water and the cooling air are separated during operation, avoiding the risk of damage caused by the energized stator contacting water, and effectively avoiding the problem of the air gap being reduced due to the expansion of the stator or the rotor after heating.

[0022] The separation module of the water-cooling unit of the present invention includes an elastic bowl-shaped elastic film made of an elastic material. When the motor starts, the suction fan sucks the water-containing air and impacts it on the elastic film. The elastic film is deformed under pressure to form a groove. Due to the self-weight of the water and the adhesion after contacting the elastic film, the water will accumulate in the groove, and the air enters the pipeline of the air-cooling unit upward under the influence of air pressure, improving the effective degree of air-water separation.

[0023] The water in the water collection module of the water cooling unit of the present invention is provided by the groove. When the water volume in the groove gradually increases until it overflows the groove and enters the water collection module, the opening of the water outlet module has a pressure threshold. When the water volume in the water collection module gradually increases, the water pressure will reach the pressure threshold to open the water outlet module. Therefore, as long as the suction fan inhales the water-containing air at this time, the water in the water collection module can be continuously replaced. Moreover, the upper side of the water collection module is for water inlet and the lower side is for water outlet, and the middle is used for heat exchange, so that the cooling water can absorb sufficient heat before being discharged, with high heat exchange efficiency. After the motor stops, the suction fan stops working, the elastic membrane loses the air pressure impact from the suction fan and returns to its original state, and all the water in the groove enters the water collection module. The water volume in the water collection module exceeds the standard, and the excess water at the lower side is discharged until a part of the cooling water is retained in the water collection module to ensure that direct and rapid water cooling can be carried out after the next start-up.

[0024] The air collection module of the air cooling unit of the present invention includes at least one trachea arranged in a spiral shape and having a draft angle. These tracheas form a bowl-shaped structure so that the water collection module of the water cooling unit can be supported. At the same time, there is gas flow in the trachea, which is pre-cooled with the water in the groove in advance to improve its heat exchange ability during water cooling.

[0025] The air collection module of the air cooling unit of the present invention includes at least one trachea arranged in a spiral shape. These tracheas can conduct more comprehensive heat exchange on the stator and improve the cooling effect on the stator.

[0026] The air outlet module of the air cooling unit of the present invention includes at least one trachea whose air outlet direction is towards the water outlet module of the water cooling unit. The impact force of the gas discharged from these tracheas can assist the water outlet module to remain normally closed, increasing the opening threshold of the water outlet module. When the motor is working, more water can be retained in the water collection module, improving the water cooling efficiency. After the motor stops, the trachea stops exhausting gas, releasing the opening threshold of the water outlet module and not affecting the water outlet of the water cooling unit.

[0027] After the motor of the water cooling unit of the present invention stops, the water level line in the water cavity is higher than the height of the rotor, so that there is still a certain heat exchange ability after stopping.

[0028] A deformation through-ring is provided in the water cavity of the water collection module of the water cooling unit of the present invention. When the rotating shaft works and generates heat for a long time, this heat will be sensed by the memory metal sheet in the deformation through-ring. The memory metal sheet changes from a straight state to a bent state, thus reducing the radial thickness of the deformation through-ring. Since the rotating shaft has a certain amount of expansion after heating, the reduction of the radial thickness of the deformation through-ring compensates for this expansion amount, effectively ensuring that the air gap between the stator and the rotor is not easily affected by the heating of the rotating shaft. Description of the Drawings

[0029] Figure 1Schematic diagram of the planar sectional structure of the first specific embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the planar structure at the separation module when the motor of the first specific embodiment of the present invention is working;

[0031] Figure 3 Schematic diagram of the planar structure at the water outlet module when the motor of the first specific embodiment of the present invention is working;

[0032] Figure 4 Schematic diagram of the planar structure at the separation module when the motor of the first specific embodiment of the present invention stops;

[0033] Figure 5 Schematic diagram of the planar structure at the water outlet module when the motor of the first specific embodiment of the present invention stops;

[0034] Figure 6 Schematic diagram of the planar structure at the water collection module after the motor of the first specific embodiment of the present invention stops;

[0035] Figure 7 Schematic diagram of the three-dimensional structure at the water outlet module of the first specific embodiment of the present invention;

[0036] Figure 8 Schematic diagram of the three-dimensional sectional structure at the water outlet module of the first specific embodiment of the present invention;

[0037] Figure 9 Schematic diagram of the three-dimensional structure of the air-cooling unit and the water-cooling unit of the second specific embodiment of the present invention;

[0038] Figure 10 Schematic diagram of the three-dimensional sectional structure of the deformable through-ring of the third specific embodiment of the present invention.

[0039] Explanation of the reference numerals in the figure:

[0040] Machine shell 1, upper end cover 11, shell body 12, lower end cover 13, suction fan 2, stator 3, rotor 4, air-cooling unit 5, air collection module 51, air gathering module 52, air outlet module 53, water-cooling unit 6, separation module 61, water collection module 62, water outlet module 63, deformable through-ring 7, ring body 71, shape memory metal sheet 72, water through-hole 73. Detailed implementation manners

[0041] Specific embodiment 1: Please refer to Figure 1-8 A motor for a car wash machine with dual air and water cooling, including a vertically arranged machine shell 1, a rotating shaft located inside the machine shell, a rotor 4 sleeved outside the rotating shaft, a stator 3 wound outside the rotor 4 and located inside the machine shell 1, a suction fan 2, an air-cooling unit 5, and a water-cooling unit 6.

[0042] The housing 1 includes an upper end cover 11, a housing body 12, and a lower end cover 13 that are distributed from top to bottom; the upper end cover 11 and the housing body 12, and the housing body 12 and the lower end cover 13 are detachably connected; the air cooling unit 5 is fixedly arranged inside the housing body 12; the upper end cover 11 is provided with an inlet communicating with the internal chamber; the lower end cover is provided with an outlet communicating with the internal chamber; the rotating shaft penetrates through the upper and lower ends of the housing 1.

[0043] The suction fan 2 is fixedly connected coaxially with a part of the rotating shaft located above the upper end cover 11, and the exhaust range of the suction fan 2 covers the inlet of the upper end cover 11, so that the water-containing air is sucked into the housing 1 from the inlet.

[0044] The air cooling unit 5 includes an air collection module 51, a gas collection module 52, and an air outlet module 53 that are distributed from top to bottom; the air collection module 51, the gas collection module 52, and the air outlet module 53 are connected in sequence.

[0045] In this embodiment, the air collection module 51 is two symmetrically arranged air collection pipes. The pipe orifice located on the upper side of the air collection pipe is the air inlet of the air cooling unit 5, and the pipeline setting direction at the air inlet is not opposite to the direction in which the water-containing air is discharged into the inner cavity of the housing 1, so that the water-containing air cannot directly enter the air cooling unit 5 after being filled into the inner cavity of the housing 1; here, the source of the water-containing air needs to be explained; since this motor is used in a car wash machine, there is a large amount of moisture in the working environment of the motor. When the suction fan 2 collects the air in the working environment, a lot of water mist in the air is naturally collected at the same time, and this is the water-containing air.

[0046] In this embodiment, the gas collection module 52 is two symmetrically arranged and spirally arranged gas collection pipes. The gas collection pipes are respectively connected to the corresponding air collection pipes, and both gas collection pipes are wound around the outside of the stator 3 and are in contact with the outside of the stator 3 to cool the stator 3; there is a certain gap between the gas collection pipes to supply power lines to connect the stator; the gas collection pipes are fixedly connected between the inner wall of the housing 12 and the outer wall of the stator 3.

[0047] In this embodiment, the air outlet module 53 is two symmetrically arranged air outlet pipes; the air outlet pipes are both connected to the corresponding gas collection pipes; both air outlet pipes are indirectly connected to the outlet provided at the lower end cover 13.

[0048] The water cooling unit 6 includes a separation module 61, a water collection module 62, and a water outlet module 63 that are distributed from top to bottom; the separation module 61, the water collection module 62, and the water outlet module 63 are connected in sequence.

[0049] In this embodiment, the separation module 61 includes an elastic film in a bowl shape made of an elastic material. The upper edge of the film is located at the lower end of the air inlet of the air collection pipe of the air cooling unit. A fixing ring made of a rigid material is fixedly arranged on the upper edge of the film. In addition, several fixing ribs are arranged on the outer side of the film and fixedly connected between the fixing ring and the water collection module 62 to maintain the film in a bowl shape. The inner side of the film corresponds to the charging direction of the water-containing air, so that after the water-containing air is charged into the inner cavity of the casing 1, it first impacts on the inner side of the film. The film has a tendency to remain flat in a free state. When the motor is started, the impact force of the water-containing air is greater than the initial elastic force of the film, causing the impacted part of the film to sink downward, forming a groove for accumulating water. After the groove contacts the water-containing air, due to the self-weight of the water and the adhesion between the water and the film, the moisture in the air will remain in the groove and accumulate, while the air will float upward and partially or completely enter the air collection pipe. The air entering the air collection pipe has been separated from most or all of the moisture, effectively ensuring water-vapor separation.

[0050] In this embodiment, the water collection module 62 is a water collection pipe, which is divided into an inner pipe and an outer pipe. The inner pipe is made of an elastic material with the ability to deform in the radial direction and is fixedly connected to the outer side wall of the rotating shaft. The outer pipe is made of a rigid material and is fixedly connected to the inner side wall of the rotor 4. The gap between the inner pipe and the outer pipe is a water cavity for storing cooling water. The upper end of the water cavity is lower than the lower end surface of the groove, so the water in the groove must accumulate to a certain amount before it can overflow from the upper end of the groove and enter the water cavity. A connecting ring is fixedly connected between the inner pipe and the outer pipe, and through holes for water circulation are formed in the connecting ring. The existence of the connecting ring enables the inner pipe and the outer pipe to be connected together and rotate synchronously. It should be noted that the lower ends of the fixing ribs in the separation module 61 are connected to the outer pipe to support the position of the film in a bowl shape.

[0051] In this embodiment, the water outlet module 63 is fixedly connected to the lower end of the water collection pipe. The water outlet module 63 is a water outlet pipe, which is divided into an inner ring and an outer ring. Both the outer ring and the inner ring are made of the same elastic film. The inner wall of the outer ring bends downward, and the inner wall of the inner ring bends downward. The inner wall of the outer ring and the outer wall of the inner ring are in contact and abut against each other. The contact structure between the inner wall of the outer ring and the outer wall of the inner ring forms a one-way channel. This one-way channel is similar to a duckbill valve, and the flow direction of the one-way channel is from top to bottom. The one-way channel is normally closed. When there is water in the water cavity, the one-way channel is always under the water pressure in the water cavity. Only when the water volume in the water cavity reaches a certain threshold, the one-way channel opens. When the one-way channel just opens, the water level line in the water cavity is higher than the height of the upper end of the rotor 4, so that the rotor 4 is always immersed in the water in the water cavity to exchange heat. The water outlet pipe is indirectly connected to the outlet opened in the lower end cover 13.

[0052] It should be noted that the inner cavity of the casing 1 can be divided from top to bottom into: a separation chamber, a working chamber, and a discharge chamber; the separation chamber includes the air collection module 51 of the air cooling unit 5 and the separation module 61 of the water cooling unit 6, and the separation chamber is the inner cavity of the upper end cover 11; the working chamber includes the air collection module 52 of the air cooling unit 5 and the water collection module 62 of the water cooling unit 6, and the working chamber is the inner cavity of the shell 12; the discharge chamber includes the air outlet module 53 of the air cooling unit 5 and the water outlet module 63 of the water cooling unit 6, and the discharge chamber is the inner cavity of the lower end cover 13. In the discharge chamber, the air outlet direction of the air outlet module 53 is not directly connected to the outlet. The air discharged from the air outlet pipe leads to the water outlet of the water outlet pipe. Since the air discharge has a certain pressure, the water outlet pipe can be assisted to remain normally closed to increase the pressure threshold for opening the water outlet pipe, so that the water in the water cavity can be maintained at a larger water volume, thereby improving the cooling efficiency of the rotor 4; finally, the gas discharged from the air outlet pipe and the water discharged from the water outlet pipe are collected through a section of total discharge pipe (not shown in the figure) and then discharged from the casing 1 through the outlet; the upper end of the total discharge pipe includes the lower end of the air outlet pipe and the lower end of the water outlet pipe, and the lower end of the total discharge pipe is connected to the outlet, and the water vapor is collected again in the total discharge pipe; the structure and arrangement of the total discharge pipe can be clearly understood by those skilled in the art through the text description in the embodiment, so it is no longer repeated in the drawings.

[0053] When the motor stops, the shaft stops rotating, the suction fan 2 stops working, the water-containing air is no longer filled into the inner cavity, the elastic film returns to its original shape, the groove disappears, and the water in the groove slides into the water cavity under the action of the inclined surface of the elastic film. The water level in the water cavity is too high, the water outlet pipe opens, and the excess water is discharged until the water cavity maintains a water volume that just closes the water outlet pipe, so that the water in the water cavity can immediately cool the rotor and the shaft when the motor is started next time.

[0054] Specific embodiment 2: Based on the specific embodiment 1, please refer to Figure 9 In this embodiment, the air collecting module 51 is two symmetrically arranged air collecting pipes, both of which are spirally arranged and have the same draft angle; the air collecting pipes are both wound around the outside of the elastic membrane of the water cooling unit 6 to receive the components at the water inlet of the water cooling unit 6. When the elastic membrane is in a free state, the air collecting pipe and the elastic membrane are kept at a distance. Only when the elastic membrane is impacted by the airflow and deformed downward, the air collecting pipe will abut against the elastic membrane of the depressed part to pre-lower the temperature of the water in the groove, so as to better cool the rotor 3.

[0055] Specific embodiment 3: Based on specific embodiment 1 or 2, please refer to Figure 10 A deformation ring 7 is fixedly provided in the water cavity to support the outer tube and the inner tube to maintain a gap;

[0056] The deformation ring 7 includes a ring body 71 and a memory metal sheet 72;

[0057] The annular body 71 is made of an elastic or flexible material, and the annular body 71 is provided with a water through hole 73 penetrating the upper and lower sides; the water through hole 73 remains open in a deformed state or a free state;

[0058] There are multiple memory metal sheets 72, which are evenly embedded inside the annular body 71; the memory metal sheets 72 are straight in a free state and bent in a temperature environment equal to or higher than the deformation temperature threshold; the inner diameter of the deformed through-ring 7 decreases and the outer diameter remains unchanged after deformation;

[0059] When the rotating shaft generates heat during long-term operation, this heat will be sensed by the memory metal sheets 72 in the deformed through-ring 7, and the memory metal sheets 72 change from a straight state to a bent state, thereby reducing the radial thickness of the deformed through-ring 7. Since the rotating shaft has a certain amount of expansion after heating, the reduction of the radial thickness of the deformed through-ring 7 compensates for this expansion amount, effectively ensuring that the air gap between the stator 3 and the rotor 4 is not easily affected by the heat generated by the rotating shaft.

[0060] Specific Embodiment Four: On the basis of any one of Specific Embodiments One to Three, a hydrophilic coating is covered on the inner side of the elastic film, so that the moisture in the water-containing air will accumulate in the groove when it contacts the inner side of the elastic film and will not be carried away by the air flow into the air inlet.

[0061] Specific Embodiment Five: On the basis of any one of Specific Embodiments One to Four, after the groove is formed, the chamfer at the inner end of the groove points to the air inlet.

[0062] Specific Embodiment Six: On the basis of any one of Specific Embodiments One to Five, the pressure received by the water outlet pipe includes the water pressure in the water chamber and the air pressure in the elastic film; when the pressure received by the water outlet pipe just causes it to open, the water level line in the water chamber is higher than the height where the upper end of the rotor 4 is located.

Claims

1. An air-water dual-cooled motor for a car wash machine, comprising a vertically arranged housing (1), a rotating shaft located inside the housing, a rotor (4) sleeved outside the rotating shaft, and a stator (3) wound outside the rotor (4) and located inside the housing (1), characterized in that: The casing (1) is provided with an inlet and an outlet communicating with the internal chamber; the motor further includes a suction fan (2), fixedly connected coaxially with the rotating shaft and located outside the casing (1) to suck the water-containing air into the casing (1) from the inlet; an air-cooling unit (5), fixedly arranged on the inner wall of the casing (1), and annularly arranged outside the stator (3) and abutting against the outer wall of the stator (3). The air inlet of the air-cooling unit (5) is indirectly communicated with the inlet; the air-cooling unit (5) includes an air-collecting module (51), a gas-collecting module (52), and an air-out module (53) distributed from top to bottom; the air-collecting module (51) is the air inlet of the air-cooling unit (5), and the air inlet is located above the water-cooling unit (6) to obtain dehydrated air; the gas-collecting module (52) includes at least one trachea arranged in a spiral shape, and the trachea arranged in a spiral shape surrounds and abuts against the outside of the stator (3) and is fixedly connected between the inner wall of the casing (1) and the outer wall of the stator (3); the air-out module (53) is the air outlet of the air-cooling unit (5); the air-collecting module (51) includes at least one trachea arranged in a spiral shape and having a draft angle; the trachea arranged in a spiral shape and having a draft angle is wound around the outside of the water inlet of the water-cooling unit (6) to receive the components at the water inlet of the water-cooling unit (6); the air-out module (53) includes at least one trachea with an air-out direction facing the water outlet of the water-cooling unit (6); and The water-cooling unit (6) is fixedly arranged between the rotating shaft and the rotor (4) and abuts against the inner wall of the rotor (4). The water inlet of the water-cooling unit (6) is indirectly communicated with the said inlet. The moisture in the water-containing air is separated at the water inlet and only enters the water inlet. The water outlet of the water-cooling unit (6) is normally closed and has an opening threshold value, and the water outlet is subject to the water pressure of the cooling water in the water-cooling unit (6). The water-cooling unit (6) includes a separation module (61), a water collection module (62), and a water outlet module (63) distributed from top to bottom. The separation module (61) is the water inlet of the water-cooling unit (6). The separation module (61) includes an elastic film in a bowl shape made of an elastic material. When the motor starts, the inner side of the elastic film is impacted by the water-containing air and deforms downward to form a groove for accumulating water. The groove is communicated with the water collection module (62). When the water level line in the groove is higher than the upper end of the groove, the water in the groove enters the water collection module (62). The water outlet module (63) is the water outlet of the water-cooling unit (6). The water outlet module (63) includes an inner ring and an outer ring. Both the outer ring and the inner ring are made of the same elastic film. The inner wall of the outer ring bends downward, and the inner wall of the inner ring bends downward. The inner wall of the outer ring and the outer wall of the inner ring are in contact and abutted, and the contact structure of the inner wall of the outer ring and the outer wall of the inner ring forms a one-way channel. The flow direction of the one-way channel is from top to bottom. The water volume corresponding to the opening threshold value of the one-way channel is that the water level line in the water collection module (62) is higher than the height where the rotor (4) is located. The water collection module (62) includes an inner tube and an outer tube. The inner tube is made of an elastic material with the ability to deform in the radial direction and is fixedly connected to the outer side wall of the rotating shaft. The outer tube is made of a rigid material and is fixedly connected to the inner side wall of the rotor (4). The gap between the inner tube and the outer tube is a water chamber for storing cooling water. The water in the water chamber is provided by the water accumulated in the groove and deformed.

2. The air-water dual-cooled motor for a car wash machine according to claim 1, characterized in that: A deformation through-ring (7) is fixedly arranged in the water chamber to support the outer tube and the inner tube to maintain the gap. The deformation through-ring (7) is at least made of an elastic material with the ability to deform in the radial direction to compensate for the expansion of the rotating shaft after heating. After the deformation through-ring (7) deforms, its inner diameter decreases and its outer diameter remains unchanged. The deformation of the deformation through-ring (7) is synchronized with the expansion deformation of the rotating shaft.

3. The air-water dual-cooled motor for a car wash machine according to claim 2, characterized in that: The deformation through-ring (7) includes a ring body (71) and a shape memory metal sheet (72). The ring body (71) is made of an elastic or flexible material, and the ring body (71) is provided with a water through-hole (73) penetrating the upper and lower sides. The water through-hole (73) remains open in the deformed state or the free state. The number of shape memory metal sheets (72) is multiple and they are evenly embedded inside the ring body (71). The shape memory metal sheets (72) are straight in the free state and bent in a temperature environment above or equal to the deformation temperature threshold value.

4. The air-water dual-cooled motor for a car wash machine according to claim 1, characterized in that: The machine shell (1) includes an upper end cover (11), a shell body (12), and a lower end cover (13) distributed from top to bottom. The upper end cover (11) and the shell body (12), and the shell body (12) and the lower end cover (13) are detachably connected. The air-cooling unit (5) is fixedly arranged inside the shell body (12).

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