Asynchronous compressor

Abstract

The utility model relates to the technical field of compressors, in particular to an asynchronous compressor, which comprises a power shaft driven by a motor to rotate; the crankshaft penetrates through the pump body, and the crankshaft and the power shaft are arranged in a non-coaxial mode; and the reversing speed reducer is provided with an input end and an output end which are non-coaxially arranged and are in speed reduction transmission connection, the input end is connected with the power shaft and synchronously rotates, and the output end is connected with the crankshaft and synchronously rotates. The reversing speed reducer is additionally arranged between the motor side power shaft and the pump body side crankshaft, asynchronous operation of the motor and the pump body is achieved, and the overall efficiency of the compressor can be greatly improved; according to the asynchronous compressor, non-coaxial arrangement and connection of the crankshaft and the power shaft are achieved, so that the asynchronous compressor can adapt to various application scenes with limited installation spaces, and the adaptive capacity range of the asynchronous compressor is effectively widened; the separation of the motor side power shaft and the pump body side crankshaft shortens the arm of force of unbalanced inertia force, so that the operation of the pump body is more stable, and the reduction of input force is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field especially relates to an asynchronous compressor. BACKGROUND

[0002] The emergence of air conditioner has improved the living environment of human. In order to adapt to the continuous operation of load variation, the rapid refrigeration and heating, the ability adaptability of extreme load, air conditioner also changes from fixed speed to frequency conversion. In order to reduce cost and improve energy efficiency, various improvement measures are endless. As the core of household air conditioner, the whole machine efficiency of rotor compressor still has great improvement space. At present, the biggest contradiction of compressor efficiency improvement is that the motor working efficiency increases with the increase of speed, but the pump body (compression structure) working efficiency decreases with the increase of speed, so that the pump body and motor cannot work in the respective best efficiency interval under the synchronous operation of the pump body and motor. SUMMARY

[0003] In view of the above defects of the prior art, the technical problem to be solved by the utility model is to provide an asynchronous compressor, which can greatly improve the whole machine efficiency and adapt to the whole machine installation space.

[0004] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0005] The utility model provides an asynchronous compressor, which comprises: a power shaft driven to rotate by a motor; a crankshaft arranged in a pump body, the crankshaft and the power shaft being arranged non-coaxially; a reversing reducer having an input end and an output end arranged non-coaxially and connected in speed reduction transmission, the input end being connected with the power shaft and rotating synchronously, and the output end being connected with the crankshaft and rotating synchronously.

[0006] Preferably, the crankshaft and the power shaft are arranged along different axial directions.

[0007] Preferably, the crankshaft and the power shaft are perpendicular.

[0008] Preferably, the reversing reducer is a right-angle reducer.

[0009] Preferably, the pump body is placed vertically, and the crankshaft is perpendicular to the mounting surface.

[0010] Preferably, the pump body is placed horizontally, and the crankshaft is arranged non-perpendicularly to the mounting surface.

[0011] Preferably, the utility model further comprises a hollow shell, the internal space of the shell comprises a motor-side accommodating cavity accommodating the motor and the power shaft, a pump-body-side accommodating cavity accommodating the pump body and the crankshaft, and a reducer accommodating cavity accommodating the reversing reducer, and the reducer accommodating cavity is located between the motor-side accommodating cavity and the pump-body-side accommodating cavity.

[0012] Preferably, the motor side accommodating cavity, the reducer accommodating cavity and the pump body side accommodating cavity are sequentially connected to form an L-shaped cavity.

[0013] Compared with the prior art, the utility model has remarkable progress:

[0014] The asynchronous compressor of the utility model, through the additional reversing reducer between the motor side power shaft and the pump body side crankshaft, realizes the motor and the pump body asynchronous operation, thus can make full use of the characteristics that the motor is higher in efficiency at high speed and the pump body is higher in efficiency at low speed, greatly improves the compressor whole machine efficiency. Meanwhile, through the non coaxial setting input end and output end of the reversing reducer respectively connecting the non coaxial setting crankshaft and power shaft, realizes the non coaxial arrangement and connection of the crankshaft and power shaft. If the reducer assembly is added between the coaxial arrangement crankshaft and power shaft, will lead to the compressor whole axial length greatly increases, causes the challenge to the compressor installation space, especially in some specific application fields and scenes, cannot realize the compressor installation space that the size is larger in one direction (such as axial). The asynchronous compressor of the utility model arranges the crankshaft and power shaft non coaxially, and adds the reversing reducer to connect the crankshaft and power shaft, well solves the above-mentioned problem, so that the newly added reversing reducer realizes the asynchronous compressor of the motor and the pump body asynchronous operation and can adapt to multiple installation space limited application scenes, effectively widens the asynchronous compressor adaptation ability range. Meanwhile, the separation of the motor side power shaft and the pump body side crankshaft makes the force arm of unbalanced inertia force shorter, can make the pump body operation more stable, helps to reduce the input. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram when the pump body of the asynchronous compressor of the utility model embodiment is vertically placed.

[0016] Figure 2 It is the structure schematic diagram when the pump body of the asynchronous compressor of the utility model embodiment is horizontally placed.

[0017] Among them, the following is explained to the reference numerals:

[0018] 1 power shaft

[0019] 2 crankshaft

[0020] 3 reversing reducer

[0021] 3a input end

[0022] 3b output end

[0023] 4 motor

[0024] 41 stator

[0025] 42 rotor

[0026] 5 pump body

[0027] 6 housing

[0028] 61 motor side accommodating cavity

[0029] 62 pump body side accommodating cavity

[0030] 63 speed reducer accommodating cavity DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate the present application, and are not a limitation on the present application.

[0032] In the description of the present application, it should be pointed out that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0035] As shown in Figure 1 and As shown in Figure 2 , an embodiment of the asynchronous compressor provided by the present application.

[0036] The asynchronous compressor of the embodiment comprises a power shaft 1, a crankshaft 2 and a reversing speed reducer 3. The power shaft 1 is driven to rotate by a motor 4, the motor 4 comprises a stator 41 and a rotor 42 arranged inside the stator 41, the power shaft 1 is arranged through the rotor 42 and fixedly connected with the rotor 42, so as to rotate synchronously with the rotor 42. The crankshaft 2 is arranged through a pump body 5, the pump body 5 is a compression structure of the compressor, and the compression of the working medium entering the pump body 5 is realized by the eccentric operation of the piston in the pump body 5 through the eccentric part of the crankshaft 2. The crankshaft 2 and the power shaft 1 are arranged non-coaxially. The reversing speed reducer 3 has an input end 3a and an output end 3b, and the input end 3a and the output end 3b of the reversing speed reducer 3 are arranged non-coaxially. The input end 3a of the reversing speed reducer 3 is connected with the power shaft 1 and rotates synchronously, and is used for receiving the rotating torque from the power shaft 1. The output end 3b of the reversing speed reducer 3 is connected with the crankshaft 2 and rotates synchronously, and is used for outputting the torque to the crankshaft 2 to drive the crankshaft 2 to operate. The input end 3a and the output end 3b of the reversing speed reducer 3 are connected in a speed reduction transmission mode, that is, the output rotating speed of the output end 3b is less than the input rotating speed of the input end 3a, so that the rotating speed of the crankshaft 2 on the pump body 5 side is less than the rotating speed of the power shaft 1 on the motor 4 side, the motor 4 and the pump body 5 are operated asynchronously, thereby the characteristics that the motor 4 has higher efficiency at high rotating speed and the pump body 5 has higher efficiency at low rotating speed can be fully utilized, and the overall efficiency of the compressor is greatly improved. At the same time, the input end 3a and the output end 3b of the reversing speed reducer 3 arranged non-coaxially are respectively connected with the crankshaft 2 and the power shaft 1 arranged non-coaxially, so as to realize the non-coaxial arrangement and connection of the crankshaft 2 and the power shaft 1. If a speed reducer assembly is added between the coaxially arranged crankshaft 2 and the power shaft 1, the overall axial length of the compressor will be greatly increased, which will cause challenges to the installation space of the compressor, especially in some specific application fields and scenes, the compressor installation space with large size in one direction (such as the axial direction) cannot be realized. The asynchronous compressor of the embodiment arranges the crankshaft 2 and the power shaft 1 non-coaxially, and adds the reversing speed reducer 3 to connect the crankshaft 2 and the power shaft 1, which well solves the above problems, so that the asynchronous compressor in which the motor 4 and the pump body 5 are operated asynchronously by the added reversing speed reducer 3 can adapt to various application scenes with limited installation space, and effectively widens the adaptation capability range of the asynchronous compressor. At the same time, the separation of the power shaft 1 on the motor 4 side and the crankshaft 2 on the pump body 5 side shortens the force arm of the unbalanced inertia force, so as to make the operation of the pump body 5 more stable and help to reduce the input.

[0037] In the embodiment, preferably, the crankshaft 2 and the power shaft 1 are arranged along different axial directions, which means that they are neither coaxial nor parallel. Correspondingly, the input end 3a and the output end 3b of the reversing speed reducer 3 are also arranged along different axial directions.

[0038] In this embodiment, preferably, the crankshaft 2 and the power shaft 1 are perpendicular, and correspondingly, the input end 3a and the output end 3b of the reversing reducer 3 are also perpendicular. This minimizes the axial structural dimensions of the asynchronous compressor in the pump body 5 and provides better overall installation space adaptability for the asynchronous compressor.

[0039] To achieve a vertical connection between crankshaft 2 and drive shaft 1, preferably, the reversing reducer 3 is a right-angle reducer. A right-angle reducer is a reducer whose input end 3a and output end 3b are perpendicular, and it has the function of vertically reversing and transmitting rotational torque. The specific form of the right-angle reducer is not limited, and any reduction mechanism with perpendicular input ends 3a and output ends 3b can be used.

[0040] like Figure 1 As shown, in a preferred embodiment, the pump body 5 is placed vertically, the crankshaft 2 is perpendicular to the mounting surface, and the power shaft 1 is perpendicular to the crankshaft but parallel to the mounting surface. The mounting surface refers to the plane on which the compressor is mounted, i.e., the compressor is placed and mounted on the mounting surface. Preferably, the reversing reducer 3 is positioned above the pump body 5, the crankshaft 2 is connected to the output end 3b of the reversing reducer 3, the motor 4 is located on one side of the reversing reducer 3, and the power shaft 1 is connected to the input end 3a of the reversing reducer 3.

[0041] like Figure 2 As shown, in another preferred embodiment, the pump body 5 is placed horizontally, the crankshaft 2 is not perpendicular to the mounting surface, and the power shaft 1 is perpendicular to the crankshaft 2. In this case, preferably, the reversing reducer 3 is located on one side of the pump body 5, the crankshaft 2 is connected to the output end 3b of the reversing reducer 3, the motor 4 is located above the reversing reducer 3, and the power shaft 1 is connected to the input end 3a of the reversing reducer 3.

[0042] Preferably, the asynchronous compressor in this embodiment further includes a hollow housing 6. The internal space of the housing 6 includes a motor-side accommodating cavity 61, a pump-side accommodating cavity 62, and a reducer accommodating cavity 63. The motor-side accommodating cavity 61 accommodates the motor 4 and the drive shaft 1. The stator 41 of the motor 4 can be fixedly connected to the housing 6 within the motor-side accommodating cavity 61. The pump-side accommodating cavity 62 accommodates the pump body 5 and the crankshaft 2. The pump casing of the pump body 5 can be fixedly connected to the housing 6 within the pump-side accommodating cavity 62. The pump casing of the pump body 5 refers to the outer shell of the pump body 5, which may include a cylinder block and a cylinder head, and is fixedly connected to the housing 6 via a cylinder head near the reversing reducer 3. The reducer accommodating cavity 63 accommodates the reversing reducer 3, and the reducer accommodating cavity 63 is located between the motor-side accommodating cavity 61 and the pump-side accommodating cavity 62.

[0043] Preferably, the motor-side accommodating cavity 61, the reducer accommodating cavity 63 and the pump-body-side accommodating cavity 62 in the shell 6 are sequentially connected to form an L-shaped cavity, so that the crankshaft 2 and the power shaft 1 can be arranged vertically and connected through the reversing reducer 3. The outer contour shape of the shell 6 is preferably an L shape conforming to the L-shaped cavity, so that the structural size of the asynchronous compressor in the axial direction of the pump body 5 can be reduced as much as possible, and the asynchronous compressor has better overall installation space adaptability.

[0044] In other embodiments, according to the installation space requirement, the motor 4 can also not be accommodated in the shell 6, but externally arranged outside the shell 6, so that the size of the shell 6 can be reduced, thereby further reducing the overall structural size of the asynchronous compressor and improving the overall installation space adaptability.

[0045] The above description is only preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. An asynchronous compressor characterized by, Comprising: a power shaft (1) driven to rotate by a motor (4); a crankshaft (2) disposed through a pump body (5), the crankshaft (2) and the power shaft (1) being disposed non-coaxially; a commutating speed reducer (3) having an input end (3a) and an output end (3b) disposed non-coaxially and connected in speed reduction transmission, the input end (3a) being connected with the power shaft (1) and rotating synchronously, the output end (3b) being connected with the crankshaft (2) and rotating synchronously.

2. The asynchronous compressor of claim 1, wherein, The crankshaft (2) and the power shaft (1) are disposed along different axes.

3. The asynchronous compressor of claim 2, wherein, The crankshaft (2) and the power shaft (1) are perpendicular.

4. The asynchronous compressor of claim 3, wherein, The commutating speed reducer (3) is a right-angle speed reducer.

5. The asynchronous compressor of claim 3, wherein, The pump body (5) is placed vertically, and the crankshaft (2) is perpendicular to the mounting surface.

6. The asynchronous compressor of claim 3, wherein, The pump body (5) is placed horizontally, and the crankshaft (2) is disposed non-perpendicularly to the mounting surface.

7. The asynchronous compressor of claim 1, wherein, Further comprising a housing (6) with an internal cavity, the internal space of the housing (6) comprising a motor-side accommodating cavity (61) accommodating the motor (4) and the power shaft (1), a pump-body-side accommodating cavity (62) accommodating the pump body (5) and the crankshaft (2), and a speed-reducer accommodating cavity (63) accommodating the commutating speed reducer (3), the speed-reducer accommodating cavity (63) being located between the motor-side accommodating cavity (61) and the pump-body-side accommodating cavity (62).

8. The asynchronous compressor of claim 7, wherein, The motor-side accommodating cavity (61), the speed-reducer accommodating cavity (63) and the pump-body-side accommodating cavity (62) are sequentially connected to form an L-shaped cavity.

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