Shell assembly and motor

Abstract

The invention provides a shell assembly and a motor, the shell assembly comprises a shell and a preheating piece, a heat source is arranged in the shell, the shell is provided with a vent hole, a waterproof ventilation valve is arranged at the vent hole, the preheating piece covers the waterproof ventilation valve in a heat conduction mode, the preheating piece comprises a preheating channel, and the preheating channel is communicated with the heat source. And the inlet end of the preheating channel leads to external air of the shell assembly, and the outlet end of the preheating channel leads to the waterproof ventilation valve, so that the technical problem that condensed water is easily generated when low-temperature air enters the motor through the waterproof ventilation valve in the prior art can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a housing assembly and a motor. Background Art

[0002] The protection level of permanent magnet synchronous motor is generally above IP67. To prevent external water from entering the motor, the motor is designed with a waterproof vent valve or waterproof hole, such as Figure 1-2 As shown, Figure 1 The waterproof breathable valve is set on the end cover. Figure 2 The waterproof breathable valve is arranged on the body; the internal pressure of the motor is different under different thermal conditions, and gas exchange is required through the breathable valve to achieve the balance of air pressure inside and outside the motor.

[0003] At present, there are two main situations in which water is generated inside the motor. One is that defects in the motor protection structure cause water to enter the motor directly from the external environment; the other is that the motor generates condensed water. When the motor is running, heat is generated inside, causing the motor temperature to rise. When the motor operating condition decreases or stops, the motor temperature begins to drop. If the ambient temperature is low, external air enters the motor through the waterproof breathable valve, causing the internal temperature of the motor to drop rapidly below the dew point temperature. The moisture in the air will condense into water droplets to form condensed water. Condensed water inside the motor can cause the insulation performance between the windings to decrease, causing short circuits or leakage, thereby reducing the electrical performance of the motor. In severe cases, it can cause the motor to fail completely. The presence of condensed water will also accelerate the corrosion of metal parts inside the motor, such as the iron core, bearings, shafts and screws. Especially for metal materials that are prone to rust, condensed water can accelerate the rust process and reduce the mechanical strength and efficiency of the motor.

[0004] How to prevent external air from entering the motor through the waterproof breathable valve to form condensed water is a technical solution that urgently needs to be solved. Summary of the invention

[0005] Therefore, the present invention provides a housing assembly and a motor, which can solve the technical problem in the prior art that low-temperature air enters the motor through a waterproof breathable valve and easily generates condensed water.

[0006] On the one hand, the present invention provides a shell assembly, which includes an outer shell and a preheating element, wherein a heat source is disposed inside the outer shell, the outer shell is provided with an air vent, a waterproof air-permeable valve is disposed at the air vent, the preheating element is thermally connected to the outer wall surface of the outer shell and covers the waterproof air-permeable valve, the preheating element includes a preheating channel, an inlet end of the preheating channel leads to the external air of the shell assembly, and an outlet end of the preheating channel leads to the waterproof air-permeable valve.

[0007] In some embodiments, the outer surface of the preheating element is covered with an insulation layer.

[0008] In some embodiments, the preheating element includes a first section plate, a second section plate, a third section plate, a fourth section plate, and a fifth section plate which are connected in sequence, the third section plate is opposite to the outer wall surface of the shell, the first section plate is connected to the shell, the fifth section plate is connected to the shell, and the space between the second section plate, the third section plate, the fourth section plate and the shell is the preheating channel; the preheating element also includes a sixth section plate, and the sixth section plate is simultaneously connected to the second section plate, the third section plate, the fourth section plate and the shell.

[0009] In some embodiments, the preheating member is a ventilation tube.

[0010] In some embodiments, the outer wall surface of the ventilation tube includes a close contact surface, and the close contact surface is close contacted with the outer wall surface of the shell.

[0011] In some embodiments, the outlet end of the preheating element is provided with a through hole connecting the preheating channel and the air outside the shell assembly.

[0012] In some embodiments, the preheating element includes a filter screen, and the filter screen is arranged at the inlet end.

[0013] In some embodiments, the thermal conductivity of the preheating element is greater than the thermal conductivity of the housing.

[0014] On the other hand, the present invention further provides a motor, comprising the housing assembly, wherein the housing is a housing of the motor.

[0015] In some embodiments, the motor includes a mounting portion, and when the motor is installed through the mounting portion, the liquid can flow from the outlet end of the preheating channel to the inlet end of the preheating channel under the action of gravity.

[0016] The present invention provides a preheating element, and when external air enters the shell, it first flows through the preheating channel, and the air is heated in the preheating channel, thereby preventing the external air temperature from being too low to generate condensed water inside the motor and at the waterproof breathable valve; since the preheating element covers the waterproof breathable valve, the temperature of the waterproof breathable valve cools down more slowly, which also prevents condensed water from being generated at the drain breathable valve when air encounters the waterproof breathable valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1It is a schematic diagram of a waterproof and breathable valve of a motor in the prior art when it is arranged at the end cover;

[0019] Figure 2 It is a schematic diagram of a conventional motor with a waterproof and breathable valve arranged around the motor;

[0020] Figure 3 Schematic diagram of a waterproof breathable valve according to an embodiment of the present invention when it is arranged around the body;

[0021] Figure 4 is a schematic diagram of a waterproof breathable valve according to an embodiment of the present invention when a preheating element is covered on the valve;

[0022] Figure 5 2 is a schematic diagram of the structure of a preheating element according to an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of a case where a heat-insulating layer is provided on the outer surface of the preheating element according to an embodiment of the present invention;

[0024] Figure 7 is a schematic diagram of a case where one side wall of a preheating element according to an embodiment of the present invention is inclined;

[0025] The accompanying drawings are marked as follows:

[0026] 1. Shell; 2. Preheating element; 3. Waterproof breathable valve; 301. Preheating channel; 302. Insulation layer; 401. First section board; 402. Second section board; 403. Third section board; 404. Fourth section board; 405. Fifth section board; 406. Sixth section board; 5. Through hole; 6. Filter. DETAILED DESCRIPTION

[0027] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0031] The present invention provides a shell assembly and a motor, which can solve the technical problem in the prior art that low-temperature air enters the motor through a waterproof breathable valve and easily generates condensed water, and solve the technical problem that low-temperature air contacts the waterproof breathable valve and generates condensed water on the waterproof breathable valve, thereby clogging the waterproof breathable valve.

[0032] See also Figure 3-7 As shown, according to an embodiment of the present invention, the present invention provides a shell assembly, the shell assembly includes a shell 1 and a preheating element 2, a heat source is arranged in the shell 1, the shell 1 is provided with a vent hole, a waterproof breathable valve 3 is arranged at the vent hole, the preheating element 2 is thermally connected to the outer wall surface of the shell 1 and covers the waterproof breathable valve 3, the preheating element 2 includes a preheating channel 301, the inlet end of the preheating channel 301 leads to the external air of the shell assembly, and the outlet end of the preheating channel 301 leads to the waterproof breathable valve.

[0033] In the prior art, the air pressure inside and outside the shell is balanced through the waterproof breathable valve. After the heat source stops working, the temperature inside the shell decreases, and the external cold air enters the shell through the waterproof breathable valve, which easily forms condensed water in the shell 1. In addition, the waterproof breathable valve is made of metal and rubber. When the heat source stops working, the metal has good thermal conductivity and the temperature drops quickly. It is very easy for the external air to form condensed water when it encounters the low-temperature metal. When there is too much condensed water, it is easy to block the vent hole, and the waterproof breathable valve 3 fails, so that the gas inside and outside the shell 1 cannot be effectively circulated. .

[0034] In the present application, when the heat source is working, the shell assembly is heated. When the heat source stops working, the temperature of the preheating element 2 is still high, and the preheating element 2 can heat and insulate the air in the preheating channel 301 and the waterproof breathable valve 3 (mainly the metal part); the air inside the shell assembly gradually cools down, and the air outside the shell assembly enters the shell 1 through the preheating channel 301. The temperature of the external air is relatively low, and the external air is heated when it flows through the preheating channel 301. The temperature difference between the air with increased temperature and the original air in the shell 1 is relatively small after entering the shell 1 through the waterproof breathable valve 3, which avoids the phenomenon of condensation water due to the contact between the lower air and the higher temperature air when entering the shell 1, and avoids the condensation water from corroding and short-circuiting other components in the shell 1. Since the temperature of the waterproof breathable valve 3 has not dropped below the dew point, the air flowing through the waterproof breathable valve 3 will not form condensation water at the drain breathable valve, and will not cause blockage to the waterproof breathable valve 3. The preheating element 2 of the present application is heat-conductingly covered on the drain and vent valve, and the heat source first heats the outer shell 1. The preheating element 2 is heated during the heating process of the outer shell 1. No additional heating element is required to heat the preheating element 2, thus saving energy.

[0035] Preferably, Figure 6 As shown, the outer surface of the preheating element 2 is covered with a thermal insulation layer 302 .

[0036] When the heat source stops working, the insulation layer 302 plays three roles: first, it delays the temperature drop rate of the preheating part 2, thereby extending the heating time of the preheating part 2 on the air; second, the insulation layer 302 has a heat insulation effect, preventing the external air from directly contacting the preheating part 2 and causing the preheating part 2 to cool down quickly; third, the insulation layer 302 has a heat storage function. When the heat source is working, it can heat the insulation layer 302 through the preheating part 2, and the insulation layer 302 stores heat. When the heat source stops working, the insulation layer 302 transfers the heat to the preheating part 2, thereby ensuring that the preheating part 2 has enough heat to heat the external air entering the preheating channel 301. These three functions together improve the heating efficiency of the air entering the housing 1 and avoid condensation due to temperature differences.

[0037] Preferably, Figure 5As shown, the preheating element 2 includes a first section plate 401, a second section plate 402, a third section plate 403, a fourth section plate 404, and a fifth section plate 405 which are connected in sequence, the third section plate 403 is opposite to the outer wall of the shell 1, the first section plate 401 is connected to the shell 1, the fifth section plate 405 is connected to the shell 1, and the space between the second section plate 402, the third section plate 403, the fourth section plate 404 and the shell 1 is the preheating channel 301; the preheating element 2 also includes a sixth section plate 406, and the sixth section plate 406 is simultaneously connected to the second section plate 402, the third section plate 403, the fourth section plate 404 and the shell 1.

[0038] Through the above arrangement, the preheating element 2 covers the outer wall of the shell 1 and forms a preheating channel 301 between the shell 1. Due to the arrangement of the sixth section plate 406, only the inlet end of the preheating channel 301 is connected to the air outside the shell assembly, that is, the external air can only enter the shell 1 through the preheating channel 301, thus avoiding the external air from entering the shell 1 without being preheated by the preheating element 2 to produce condensed water. The above arrangement is equivalent to one end of the preheating element 2 being open to the outside atmosphere and the other end being closed, so that after the air enters the preheating channel 301, it can only enter the shell 1 through the waterproof breathable valve 3. Since one end of the preheating element 2 is closed, the heated gas in the preheating channel 301 is not easily discharged by the external air circulation, which is equivalent to the gas in the preheating pipe being relatively fixed and high temperature. When the heat source stops working, the high temperature air in the preheating channel 301 makes the air temperature near the waterproof breathable valve 3 cool down slowly, thereby making the speed at which the external air enters the shell 1 relatively slow, avoiding the sudden large amount of cold air entering the shell 1 to produce condensed water.

[0039] The first section plate 401 and the fifth section plate 405 not only serve as connecting parts to fix the preheating element 2 on the housing 1, but also serve as heat conducting parts to be closely connected with the housing 1, and quickly absorb heat from the housing 1 to heat up the preheating element 2. Specifically, the first section plate 401 and the fifth section plate 405 can be locked on the outer wall surface of the housing 1 by screws.

[0040] Preferably, the preheating element 2 is a ventilation pipe.

[0041] By configuring the preheating member 2 as a vent pipe, the structure of the preheating member 2 is simplified, which is convenient for reducing costs and improving production efficiency. The inner cavity of the vent pipe is the preheating channel 301, one end of the vent pipe leads to the atmosphere, and the other end leads to the waterproof breathable valve 3; air enters the vent pipe through one end of the vent pipe, and enters the waterproof breathable valve 3 from the other end of the vent pipe after being heated in the inner cavity of the vent pipe (that is, in the preheating channel 301).

[0042] Preferably, the outer wall surface of the ventilation pipe includes a close contact surface, and the close contact surface is in contact with the outer wall surface of the shell 1.

[0043] The ventilation pipe is attached to the outer wall of the shell 1 through the abutting surface, which increases the heat transfer area, facilitates the heat transfer from the shell 1 to the ventilation pipe, helps to increase the temperature of the ventilation pipe, and further improves the heating efficiency of the air.

[0044] Preferably, Figure 6 As shown, the outlet end of the preheating element 2 is provided with a through hole 5 connecting the preheating channel 301 and the air outside the shell assembly.

[0045] When external cold air enters the preheating channel 301 and meets the hot air in the preheating channel 301 to generate condensed water, the condensed water flows out along the inner wall of the preheating part 2. By arranging the through hole 5 at the outlet end, the discharge of the condensed water can be accelerated.

[0046] Preferably, Figure 5 As shown, the preheating element 2 includes a filter screen 6, and the filter screen 6 is arranged at the inlet end.

[0047] The filter 6 can filter the air entering the preheating channel 301 to prevent dust, insects, etc. in the air from entering the preheating channel 301 and blocking the waterproof breathable valve 3. At the same time, the filter 6 can have a certain blocking effect on the gas flow inside and outside the preheating channel 301. When the heat source is in operation, the filter 6 can reduce the influence of the atmospheric flow on the high-temperature gas in the preheating channel 301, so that the air in the preheating channel 301 is kept at a high temperature, and the preheating element 2 is also kept at a high temperature, so as to prepare for heating the air entering the motor after the heat source stops working.

[0048] Furthermore, the filter 6 is a heat-conducting member, such as metals such as aluminum and copper. The filter 6 is connected to the housing 1 by heat conduction. The filter 6 absorbs heat from the housing 1. The filter 6 can heat the air flowing through the filter 6. In this way, the temperature of the air entering the preheating channel 301 is increased, and the temperature difference between the air entering the preheating channel 301 and the air in the original housing 1 is further reduced, which is conducive to reducing the generation of condensed water. When the external air temperature is too low and the preheating element 2 cannot heat the air in a short time, the air first flows through the filter 6, and condensed water is formed on the filter 6. In this way, a dehumidification effect is formed on the air, avoiding or reducing the probability and amount of condensed water formed in the water-draining air valve and the housing 1.

[0049] Preferably, the thermal conductivity of the preheating element 2 is greater than the thermal conductivity of the housing 1 .

[0050] By making the thermal conductivity of the preheating element 2 greater than that of the outer shell 1 , the heating of the air in the preheating channel 301 can be accelerated, and the temperature difference between the external air after entering the outer shell 1 and the original air in the outer shell 1 can be further reduced.

[0051] The present invention also provides a motor, such as Figure 3 and Figure 4 , including the housing assembly, wherein the housing 1 is the housing of the motor.

[0052] The existing motor internal and external gas circulation device is a waterproof breathable valve 3, which is directly exposed to the outside of the motor. There is a temperature difference before and after the motor is running. After the motor runs stably, the temperature is generally higher than the ambient temperature. If the external cold air enters the motor from the waterproof breathable valve 3 and contacts the internal hot air, condensation water is easily generated. When the housing 1 is the housing of the motor, the heat source is the stator and rotor of the motor, and heat is generated when the rotor rotates relative to the stator. Condensation water is not easy to be generated in the housing of the motor, which is conducive to improving the safety and stability of the motor.

[0053] The waterproof breathable valve 3 is made of metal and rubber. In the prior art, when the preheating element 2 of the present application is not provided, after the motor stops working, when the external air encounters the metal included in the breathable valve, condensation water is easily formed at the waterproof breathable valve 3, and the condensation water will block the waterproof breathable valve 3. The present application is provided with a preheating element 2. After the motor stops working, during the cooling process of the motor, the internal pressure of the motor gradually decreases, and the external air flows through the preheating channel 301 and enters the motor through the waterproof breathable valve 3. The external air is preheated and heated in the preheating channel 301. The heated air flows through the waterproof breathable valve 3 without condensation (in addition, the metal is covered by the preheating element 2, the metal cools down slowly, and the metal temperature is still above the dew point. The air encounters the metal with a higher temperature and does not produce condensation water). The heated air enters the motor through the waterproof breathable valve 3 to balance the pressure; when the pressure inside and outside the motor is balanced, gas flow no longer occurs inside and outside the motor due to the pressure difference. At this time, when the temperature of the waterproof breathable valve 3 is reduced to the dew point, the condensation has little effect on the gas circulation of the motor. When the motor starts to work, the temperature of the motor gradually increases, the internal pressure increases, and the gas needs to be discharged to the outside through the waterproof breathable valve 3; because the waterproof breathable valve 3 is covered by the preheating part 2, after the waterproof breathable valve 3 is heated, the temperature in the preheating channel 301 also starts to rise, and the temperature increase in the preheating channel 301 is conducive to the condensation outside the waterproof breathable valve 3 (when the humidity of the environment in which the motor is located is high, condensation will still be generated on the motor housing 1 including the waterproof breathable valve 3, but due to the balance of pressure inside and outside the motor, the condensation will not enter the motor through the waterproof breathable valve 3) and evaporate quickly, thereby facilitating the air in the motor to flow out through the waterproof breathable valve 3.

[0054] Preferably, the motor includes a mounting portion, and when the motor is installed via the mounting portion, the liquid can flow from the outlet end of the preheating channel 301 to the inlet end of the preheating channel 301 under the action of gravity.

[0055] External air enters the preheating channel 301 and contacts with the original hot air in the preheating channel 301 to generate condensed water. The condensed water flows directly out from the outlet end of the preheating channel 301 under the action of gravity, thereby preventing the condensed water from gathering in the preheating channel 301.

[0056] Specifically, when the motor is a horizontal motor and the preheating element 2 is arranged on the periphery of the housing 1 (not on the end covers at both ends), the length direction of the preheating element 2 is consistent with the axis direction of the motor, which is convenient for installation and reduces the difficulty of installation. In order to discharge a small amount of condensed water generated in the preheating element 2, the wall thickness of the preheating element 2 can be designed to be infinitely thinner, so that the upper surface of the lower side of the preheating element 2 is inclined, such as Figure 7 As shown, for example, the inclination angle is 1°, that is, the waterproof breathable valve 3 is thicker and higher at one end, and thinner and lower at the other end. This structure is conducive to drainage. When condensed water or external rainwater enters the pipe, it can be discharged toward the lower and thinner end. In addition, the preheating element 2 can also be installed on the housing 1 at a certain angle, with the outlet end of the preheating element 2 at a high position and the inlet end of the preheating element 2 at a low position, which is convenient for drainage. The motor is a horizontal motor. When the preheating element 2 is set on the end cover, the inlet end of the preheating element 2 is set downward.

[0057] When the motor is installed vertically, the preheating element 2 is arranged on the periphery of the housing 1, and the inlet end of the preheating element 2 faces downward.

[0058] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A housing assembly, characterized in that: The shell assembly comprises an outer shell (1) and a preheating element (2); a heat source is arranged inside the outer shell (1); the outer shell (1) is provided with an air vent; a waterproof air-permeable valve (3) is arranged at the air vent; the preheating element (2) is thermally connected to the outer wall surface of the outer shell (1) and covers the waterproof air-permeable valve (3); the preheating element (2) comprises a preheating channel (301); an inlet end of the preheating channel (301) leads to the external air of the shell assembly; and an outlet end of the preheating channel (301) leads to the waterproof air-permeable valve (3).

2. The housing assembly according to claim 1, characterized in that: The outer surface of the preheating element (2) is covered with a thermal insulation layer (302).

3. The housing assembly according to claim 1, characterized in that: The preheating element (2) comprises a first section plate (401), a second section plate (402), a third section plate (403), a fourth section plate (404), and a fifth section plate (405) which are connected in sequence, wherein the third section plate (403) is opposite to the outer wall surface of the shell (1), the first section plate (401) is connected to the shell (1), the fifth section plate (405) is connected to the shell (1), and the space between the second section plate (402), the third section plate (403), the fourth section plate (404) and the shell (1) is the preheating channel (301); the preheating element (2) further comprises a sixth section plate (406), and the sixth section plate (406) is simultaneously connected to the second section plate (402), the third section plate (403), the fourth section plate (404) and the shell (1).

4. The housing assembly according to claim 1, characterized in that: The preheating component (2) is a ventilation pipe.

5. The housing assembly according to claim 4, characterized in that: The outer wall surface of the ventilation pipe comprises a close contact surface, and the close contact surface is in contact with the outer wall surface of the outer shell (1).

6. The housing assembly according to claim 1, characterized in that: The outlet end of the preheating element (2) is provided with a through hole (5) communicating with the preheating channel (301) and the air outside the shell assembly.

7. The housing assembly according to claim 1, characterized in that: The preheating element (2) comprises a filter screen (6), and the filter screen (6) is arranged at the inlet end.

8. The housing assembly according to any one of claims 1 to 7, characterized in that: The thermal conductivity of the preheating element (2) is greater than the thermal conductivity of the outer shell (1).

9. A motor, characterized in that: It comprises the housing assembly according to any one of claims 1 to 8, wherein the housing (1) is a housing (1) of the motor.

10. The motor according to claim 9, characterized in that The motor comprises a mounting portion, and when the motor is mounted via the mounting portion, liquid can flow from the outlet end of the preheating channel (301) to the inlet end of the preheating channel (301) under the action of gravity.

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