Engine structure and compressor

Abstract

The present application relates to the technical field of compressor, and provides a machine body structure and a compressor, the machine body structure comprises a casing, the casing is provided with a partition plate, the partition plate separates the casing into a motor cavity and a crank cavity, the casing is provided with a cooling channel in the wall corresponding to the motor cavity, the casing is provided with an exhaust channel in the wall corresponding to the crank cavity, and the cooling channel and the exhaust channel are communicated through a through hole arranged on the partition plate. The motor in the motor cavity is forcedly cooled through airflow in the cooling channel, and the airflow is discharged through the exhaust channel to realize circulation of the airflow. Compared with the traditional water cooling mode, the above-mentioned mode is simpler in assembly and more reliable.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to a machine body structure and a compressor. Background Technology

[0002] Gas compressors can be classified into open compressors, semi-hermetic compressors, and closed compressors based on their structural arrangement. Semi-hermetic compressors have advantages such as compact structure, small size, and light weight. The motor housing and compressor body of a semi-hermetic compressor are cast together, and the internal cavities are interconnected, eliminating the need for shaft seals and avoiding leakage caused by poor shaft seals. Therefore, semi-hermetic compressors are currently the mainstream type of compressor.

[0003] However, the integrated structure of a semi-hermetic compressor can cause the motor to overheat, especially in carbon dioxide compressors where the operating temperature is even higher. Overheating of the motor can not only affect the lifespan of motor components, but also indirectly lead to higher compressor discharge temperatures, and may even directly cause compressor malfunction.

[0004] Domestic compressor technology started relatively late. Among semi-hermetic compressors using common working fluids, some use air and water to cool the motor, while others use low-temperature working fluid gas to cool the motor. Air-cooled and water-cooled compressors require external units, which not only have certain requirements for the cooling medium but may also fail to achieve good cooling results.

[0005] Existing methods for cooling motors using refrigerant gas include: 1. The air inlet is located at the motor housing end cover, allowing gas to pass sequentially through the motor shaft and the suction port; 2. The air inlet is located at the top of the compressor housing, allowing gas to pass through a through-hole in the compressor body into the motor housing, naturally cooling the motor before flowing back into the suction port. Neither of these methods provides forced lubrication, resulting in poor cooling performance in high-pressure compressors and consequently low compressor efficiency.

[0006] Therefore, there is an urgent need for a machine structure and compressor to prevent the compressor from overheating the motor and the exhaust temperature from being too high during normal operation. Summary of the Invention

[0007] This invention provides a machine structure to solve the technical problems of motor overheating and excessively high exhaust temperature in compressors during normal operation, thereby achieving rapid cooling of the motor during compressor operation.

[0008] The present invention also provides a compressor.

[0009] The present invention provides a machine body structure, including a housing, the housing having a partition that divides the housing into a motor cavity and a crankshaft cavity, the housing having a cooling channel in the housing wall corresponding to the motor cavity, and an exhaust channel in the housing wall corresponding to the crankshaft cavity, the cooling channel and the exhaust channel being connected through a through hole provided on the partition.

[0010] According to a body structure provided by the present invention, the cooling channel includes an air intake channel, a first air guide channel, a first annular flow channel, a second air guide channel, and a second annular flow channel connected in sequence. The end of the air intake channel away from the first air guide channel forms an air inlet on the outer surface of the housing. The end of the second annular flow channel away from the second air guide channel is connected to the through hole.

[0011] The first annular flow channel, the second air guide channel, and the second annular flow channel are all formed on the inner surface of the housing.

[0012] According to a body structure provided by the present invention, the air intake channel is located on the housing near the partition, and the air intake channel is arranged along the length direction of the partition.

[0013] According to a housing structure provided by the present invention, the first air guide channel is arranged along the length direction of the housing, and the first annular flow channel is arranged on the housing at a position away from the partition plate, and the first annular flow channel is used to cool the motor stator.

[0014] According to a housing structure provided by the present invention, the second air guide channel is arranged along the length direction of the housing, and the second annular flow channel is arranged on the housing near the partition plate, and the second annular flow channel is used to cool the motor stator.

[0015] According to a body structure provided by the present invention, the exhaust channel includes an air intake chamber and an air intake channel. The first end of the air intake chamber is connected to the through hole, and the second end of the air intake chamber is connected to the first end of the air intake channel. The second end of the air intake channel forms an exhaust port on the outer surface of the housing.

[0016] According to a body structure provided by the present invention, the partition plate is further provided with a clearance hole for accommodating the output shaft of the motor.

[0017] According to a body structure provided by the present invention, the partition has a support tube extending from the clearance hole toward the motor cavity.

[0018] According to a body structure provided by the present invention, the bottom of the housing is provided with a mounting base.

[0019] The present invention also provides a compressor, including a motor and a housing structure as described above, wherein the motor is mounted in the motor cavity of the housing.

[0020] The machine structure provided in this embodiment of the invention uses a motor cavity and a crankshaft cavity within the housing to house the motor and crankshaft mechanism, respectively. The housing has cooling channels on the wall corresponding to the motor cavity and exhaust channels on the wall corresponding to the crankshaft cavity. This allows for forced cooling of the motor within the motor cavity via airflow within the cooling channels, and airflow circulation is achieved by exhausting the air through the exhaust channels. Compared to traditional water cooling methods, this approach is not only simpler to assemble but also more reliable.

[0021] The compressor provided in this embodiment of the invention, by adopting the above-described body structure and installing the motor in the motor cavity of the housing, can force-cool the motor. Compared with the traditional water cooling method, it is not only simpler to assemble, but also more reliable. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of the body structure provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the gas flow domain of the body structure provided by the present invention.

[0025] Figure label:

[0026] 1. Housing; 2. Partition plate; 3. Motor cavity; 4. Crankshaft cavity; 5. Through hole; 6. Intake passage; 7. First air guide passage; 8. First annular flow channel; 9. Second air guide passage; 10. Second annular flow channel; 11. Intake chamber; 12. Intake passage; 13. Support tube; 14. Mounting base. Detailed Implementation

[0027] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0030] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] The following is combined Figures 1-2The structure of the present invention is described. The structure includes a housing 1, a partition 2, which divides the housing 1 into a motor cavity 3 and a crankshaft cavity 4. The housing 1 has a cooling channel in the housing wall corresponding to the motor cavity 3 and an exhaust channel in the housing wall corresponding to the crankshaft cavity 4. The cooling channel and the exhaust channel are connected by a through hole 5 provided on the partition 2.

[0033] The motor cavity 3 and crankshaft cavity 4 within the housing 1 house the motor and crankshaft mechanism, respectively. Cooling channels are provided on the housing wall corresponding to the motor cavity 3, and exhaust channels are provided on the housing wall corresponding to the crankshaft cavity 4. This allows for forced cooling of the motor within the motor cavity 3 via airflow within the cooling channels, and airflow circulation is achieved by exhausting the air through the exhaust channels. Compared to traditional water cooling methods, this approach is not only simpler to assemble but also more reliable.

[0034] like Figure 1 and Figure 2 As shown, the cooling channel includes an intake channel 6, a first air guide channel 7, a first annular flow channel 8, a second air guide channel 9, and a second annular flow channel 10 connected in sequence. The end of the intake channel 6 away from the first air guide channel 7 forms an air inlet on the outer surface of the housing 1, and the end of the second annular flow channel 10 away from the second air guide channel 9 is connected to the through hole 5.

[0035] like Figure 1 The middle arrow indicates the airflow direction. The airflow enters the air intake channel 6 from the air inlet, and then flows sequentially along the first air guide channel 7, the first annular flow channel 8, the second air guide channel 9, and the second annular flow channel 10. The airflow mainly cools the motor at the first annular flow channel 8 and the second annular flow channel 10. The first air guide channel 7 and the second air guide channel 9 mainly serve to guide the airflow.

[0036] The first annular flow channel 8 and the second annular flow channel 10 can ensure that the motor can be forcibly cooled at different locations to ensure efficient and reliable cooling of the motor.

[0037] The first annular flow channel 8, the second air guide channel 9, and the second annular flow channel 10 are formed on the inner surface of the housing 1. This reduces the processing difficulty of the first annular flow channel 8, the second air guide channel 9, and the second annular flow channel 10. After the motor is installed into the motor cavity 3, the outer surface of the motor is in direct contact with the first annular flow channel 8, the second air guide channel 9, and the second annular flow channel 10. That is, when the airflow passes through the first annular flow channel 8, the second air guide channel 9, and the second annular flow channel 10, the motor can be directly subjected to forced air cooling, thereby improving the cooling efficiency.

[0038] like Figure 2As shown, the first annular flow channel 8 is not completely annular. That is, there are some positions on the inner surface of the housing 1 that are adapted to the first annular flow channel 8 for mutual cooperation with the surface of the motor to ensure the normal assembly of the motor.

[0039] The intake channel 6 is located on the housing 1 near the partition 2, and is arranged along the length of the partition 2. The first air guide channel 7 is arranged along the length of the housing 1, and the first annular flow channel 8 is located on the housing 1 away from the partition 2. The first annular flow channel 8 is used to cool the motor stator. The second air guide channel 9 is arranged along the length of the housing 1, and the second annular flow channel 10 is located on the housing 1 near the partition 2. The second annular flow channel 10 is used to cool the motor stator.

[0040] In this way, the airflow can cool the stator of the motor at two locations, namely, at the first annular flow channel 8 and the second annular flow channel 10, so as to achieve efficient cooling of the motor stator.

[0041] An air pump can be installed outside the housing 1. The air pump's inlet is connected to the exhaust port, and its outlet is connected to the inlet. When the air pump is working, airflow flows into the inlet channel 6 through the inlet. After flowing along the inlet channel 6 and the first air guide channel 7, the airflow enters the first annular flow channel 8. The airflow flows around the first annular flow channel 8 for one revolution (clockwise or counterclockwise), so that the airflow can force-cool the stator of the motor. The airflow after forced cooling passes through the second air guide pipe. The airflow enters the second annular flow channel 10, which is a closed annular channel. At this time, part of the airflow will directly enter the intake chamber 11 from the through hole 5, and the other part of the airflow will go through the second annular flow channel 10 once and then enter the intake chamber 11 (clockwise or counterclockwise flow is acceptable), thereby cooling the stator at another position of the motor. After entering the intake chamber 11, the airflow will flow into the air pump along the intake channel 12 and the exhaust port, thus realizing the entire cooling cycle process.

[0042] Using the above method, the gas can be forced to pass through the designed airflow channel, carrying away the heat of the motor as it flows through it, thereby cooling the motor and ensuring that the gas circuit inside the compressor will not be short-circuited.

[0043] Since the first annular flow channel 8, the second air guide channel 9, and the second annular flow channel 10 are all formed on the inner surface of the housing 1, when the gas flows through the first annular flow channel 8 and the second annular flow channel 10 to cool the stator of the motor, it can also play a certain cleaning role on the compressor itself, such as cleaning volatile gas impurities.

[0044] According to the body structure provided by the present invention, the partition 2 is further provided with a clearance hole for accommodating the output shaft of the motor. A support tube 13 extends from the partition 2 toward the motor cavity 3 at the clearance hole. The support tube 13 and the clearance hole can be used to accommodate the output shaft of the motor so that the output shaft of the motor can be transmitted into the crankshaft cavity 4 to drive the components inside the crankshaft cavity 4.

[0045] like Figure 1 As shown, a mounting base 14 is also provided at the bottom of the housing 1, which can be used to fix the position of the housing 1.

[0046] On the other hand, the present invention also provides a compressor, which includes a motor and the housing structure described in the foregoing embodiments, wherein the motor is mounted in the motor cavity 3 of the housing 1. This compressor can provide forced cooling of the motor, which, compared with traditional water cooling methods, is not only simpler to assemble but also more reliable.

[0047] This compressor introduces two annular gas flow channels inside the casing 1, which enables the gas to force-cool the motor. The gas then circulates through the suction chamber 11, the suction channel 12, and the exhaust port, eliminating the need for an external chiller unit to cool the motor. This simplifies the assembly and operation of the compressor and increases its reliability.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A body structure, characterized in that, The device includes a housing, which is provided with a partition that divides the housing into a motor cavity and a crankshaft cavity. The housing has a cooling channel in the housing wall corresponding to the motor cavity, which is used to force-cool the motor in the motor cavity through airflow. The housing also has an exhaust channel in the housing wall corresponding to the crankshaft cavity, which is used to discharge airflow to achieve airflow circulation. The cooling channel and the exhaust channel are connected through a through hole provided on the partition. The cooling channel includes an air intake channel, a first air guide channel, a first annular flow channel, a second air guide channel, and a second annular flow channel connected in sequence. The end of the air intake channel away from the first air guide channel forms an air inlet on the outer surface of the housing. The end of the second annular flow channel away from the second air guide channel is connected to the through hole. The first annular flow channel, the second air guide channel, and the second annular flow channel are all formed on the inner surface of the housing; The first air guide channel is arranged along the length of the housing, and the first annular flow channel is arranged on the housing at a position away from the partition plate. The first annular flow channel is used to cool the motor stator. The second air guide channel is arranged along the length of the housing, and the second annular flow channel is arranged on the housing near the partition plate. The second annular flow channel is used to cool the motor stator.

2. The body structure according to claim 1, characterized in that, The air intake channel is located on the housing near the partition, and the air intake channel is arranged along the length of the partition.

3. The body structure according to claim 1 or 2, characterized in that, The exhaust channel includes an air intake chamber and an air intake channel. The first end of the air intake chamber is connected to the through hole, and the second end of the air intake chamber is connected to the first end of the air intake channel. The second end of the air intake channel forms an exhaust port on the outer surface of the housing.

4. The body structure according to claim 1 or 2, characterized in that, The partition plate is also provided with a clearance hole for accommodating the output shaft of the motor.

5. The body structure according to claim 4, characterized in that, The partition has a support tube extending from the clearance hole toward the motor cavity.

6. The body structure according to claim 1 or 2, characterized in that, The bottom of the housing is provided with a mounting base.

7. A compressor, characterized in that, It includes a motor and a body structure as described in any one of claims 1-6, wherein the motor is mounted in the motor cavity of the housing.

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