Asynchronous compressor

Abstract

The invention 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 present invention relates to the technical field of compressors, and in particular to an asynchronous compressor. Background Art

[0002] The emergence of air conditioners has improved the living environment of human beings. In order to adapt to the continuous operation of load changes, rapid cooling and heating, and the ability to adapt to extreme loads, air conditioners have moved from fixed speed to variable frequency. In order to reduce costs and improve energy efficiency, various improvement measures have emerged in an endless stream. As the core of household air conditioners, the rotary compressor still has a lot of room for improvement in overall efficiency. At present, the biggest contradiction in improving the efficiency of compressors is that the working efficiency of the motor increases with the increase of speed, but the working efficiency of the pump body (compression structure) decreases with the increase of speed, resulting in the pump body and motor of the compressor cannot work in their respective optimal efficiency ranges at the same time when the pump body and motor are running synchronously. Summary of the invention

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

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides an asynchronous compressor, comprising: a power shaft, driven by a motor to rotate; a crankshaft, which passes through a pump body, and the crankshaft and the power shaft are non-coaxially arranged; a reversing reducer, which has an input end and an output end which are non-coaxially arranged and connected by a reduction transmission, the input end is connected to the power shaft and rotates synchronously, and the output end is connected to the crankshaft and rotates 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 not arranged perpendicular to the mounting surface.

[0011] Preferably, it also includes a hollow shell, the internal space of the shell includes a motor side accommodating chamber for accommodating the motor and the power shaft, a pump body side accommodating chamber for accommodating the pump body and the crankshaft, and a reducer accommodating chamber for accommodating the displacement reducer, and the reducer accommodating chamber is located between the motor side accommodating chamber and the pump body side accommodating chamber.

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

[0013] Compared with the prior art, the present invention has significant improvements:

[0014] The asynchronous compressor of the present invention realizes asynchronous operation of the motor and the pump body by adding a reversing reducer between the power shaft on the motor side and the crankshaft on the pump body side, thereby making full use of the characteristics that the motor is more efficient at high speed and the pump body is more efficient at low speed, greatly improving the efficiency of the compressor. At the same time, the non-coaxial arrangement and connection of the crankshaft and the power shaft are respectively connected by the non-coaxial input and output ends of the reversing reducer. If a reducer assembly is added between the coaxially arranged crankshaft and the power shaft, the overall axial length of the compressor will be greatly increased, which will pose a challenge to the installation space of the compressor, especially in some specific application fields and scenarios, it is impossible to achieve a compressor installation space with a larger size in one direction (such as axial direction). The asynchronous compressor of the present invention solves the above problems well by arranging the crankshaft and the power shaft non-coaxially and adding a reversing reducer to connect the crankshaft and the power shaft, so that the asynchronous compressor that realizes asynchronous operation of the motor and the pump body with the newly added reversing reducer can adapt to a variety of application scenarios with limited installation space, effectively broadening the scope of the adaptability of the asynchronous compressor. At the same time, the separation of the power shaft on the motor side and the crankshaft on the pump body side shortens the force arm of the unbalanced inertial force, which can make the operation of the pump body more stable and help reduce the input force. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of an asynchronous compressor according to an embodiment of the present invention when the pump body is placed vertically.

[0016] Figure 2 It is a schematic structural diagram of an asynchronous compressor according to an embodiment of the present invention when the pump body is placed horizontally.

[0017] The reference numerals are described as follows:

[0018] 1 Power shaft

[0019] 2 Crankshaft

[0020] 3 Reversing reducer

[0021] 3a Input

[0022] 3b Output

[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 chamber

[0030] 63 Reducer housing cavity DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0035] like Figure 1 and Figure 2 The figure shows an embodiment of the asynchronous compressor provided by the present invention.

[0036] The asynchronous compressor of this embodiment includes a power shaft 1, a crankshaft 2 and a reversing reducer 3. The power shaft 1 is driven to rotate by a motor 4, and the motor 4 includes a stator 41 and a rotor 42 arranged inside the stator 41. The power shaft 1 is inserted through the rotor 42 and fixedly connected to the rotor 42, so as to rotate synchronously with the rotor 42. The crankshaft 2 is inserted through the pump body 5, and the pump body 5 is a compression structure of the compressor. The eccentric part of the crankshaft 2 carries the piston to perform eccentric operation inside the pump body 5 to achieve compression of the working medium entering the pump body 5. The crankshaft 2 and the power shaft 1 are non-coaxially arranged. The reversing 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 reducer 3 are non-coaxially arranged. The input end 3a of the reversing reducer 3 is connected to the power shaft 1 and rotates synchronously, and is used to receive the rotational torque from the power shaft 1. The output end 3b of the reversing reducer 3 is connected to the crankshaft 2 and rotates synchronously, and is used to output torque to the crankshaft 2 to drive the crankshaft 2 to operate. The input end 3a and the output end 3b of the reversing reducer 3 are connected by a reduction transmission, that is, the output speed of the output end 3b is less than the input speed of the input end 3a, so that the speed of the crankshaft 2 on the pump body 5 side is less than the speed of the power shaft 1 on the motor 4 side, and the motor 4 and the pump body 5 are asynchronously operated, thereby making full use of the characteristics that the motor 4 is more efficient at high speed and the pump body 5 is more efficient at low speed, greatly improving the efficiency of the compressor. At the same time, the non-coaxial arrangement and connection of the crankshaft 2 and the power shaft 1 are respectively connected by the non-coaxial input end 3a and the output end 3b of the reversing reducer 3. If a 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 pose a challenge to the installation space of the compressor, especially in some specific application fields and scenarios, where a compressor installation space with a larger size in one direction (such as the axial direction) cannot be achieved. The asynchronous compressor of this embodiment solves the above-mentioned problem well by arranging the crankshaft 2 and the power shaft 1 non-coaxially and adding a reversing reducer 3 to connect the crankshaft 2 and the power shaft 1, so that the asynchronous compressor with the newly added reversing reducer 3 realizing the asynchronous operation of the motor 4 and the pump body 5 can adapt to a variety of application scenarios with limited installation space, effectively broadening the adaptability 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 inertial force, which can make the operation of the pump body 5 more stable and help reduce the input force.

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

[0038] In this embodiment, preferably, the crankshaft 2 and the power shaft 1 are perpendicular to each other, and accordingly, the input end 3a and the output end 3b of the reversing reducer 3 are also perpendicular to each other. This can reduce the structural dimensions of the asynchronous compressor in the axial direction of the pump body 5 as much as possible, and make the asynchronous compressor have better overall installation space adaptability.

[0039] In order to realize the vertical connection between the crankshaft 2 and the power shaft 1, preferably, the reversing reducer 3 is a right-angle reducer, which is a reducer with a perpendicular input end 3a and an output end 3b, and has the function of vertical reversing and transmitting rotation torque. The specific form of the right-angle reducer is not limited, and any reduction mechanism with a perpendicular input end 3a and an output end 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 and parallel to the mounting surface. The mounting surface refers to the plane on which the compressor is mounted, that is, the compressor is placed and mounted on the mounting surface. At this time, preferably, the reversing reducer 3 is arranged above the pump body 5, the crankshaft 2 is connected to the output end 3b of the reversing reducer 3, the motor 4 is arranged 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 arranged perpendicularly to the mounting surface, and the power shaft 1 is perpendicular to the crankshaft 2. At this time, preferably, the reversing reducer 3 is arranged 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 arranged 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 of this embodiment further includes a hollow shell 6, the internal space of which includes a motor-side accommodating chamber 61, a pump-side accommodating chamber 62 and a reducer accommodating chamber 63. The motor-side accommodating chamber 61 accommodates the motor 4 and the power shaft 1, and the stator 41 of the motor 4 can be fixedly connected to the shell 6 in the motor-side accommodating chamber 61. The pump-side accommodating chamber 62 accommodates the pump body 5 and the crankshaft 2, and the pump shell of the pump body 5 can be fixedly connected to the shell 6 in the pump-side accommodating chamber 62. The pump shell of the pump body 5 refers to the outer shell of the pump body 5, which may include a cylinder body and a cylinder head, and is fixedly connected to the shell 6 through the cylinder head close to the reversing reducer 3. The reducer accommodating chamber 63 accommodates the reversing reducer 3, and the reducer accommodating chamber 63 is located between the motor-side accommodating chamber 61 and the pump-side accommodating chamber 62.

[0043] Preferably, the motor side accommodating chamber 61, the reducer accommodating chamber 63 and the pump body side accommodating chamber 62 in the housing 6 are connected in sequence 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 of the housing 6 is preferably an L-shape that follows the L-shaped cavity, thereby reducing the structural size of the asynchronous compressor in the axial direction of the pump body 5 as much as possible and making the asynchronous compressor have better overall installation space adaptability.

[0044] In other embodiments, according to the installation space requirements, the motor 4 may not be placed inside the housing 6, but may be placed outside the housing 6, thereby reducing the size of the housing 6, thereby further reducing the overall structural size of the asynchronous compressor and improving the overall installation space adaptability.

[0045] The above 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 substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An asynchronous compressor, characterized in that: include: A power shaft (1) is driven to rotate by a motor (4); A crankshaft (2) is inserted into the pump body (5), and the crankshaft (2) and the power shaft (1) are non-coaxially arranged; The reversing reducer (3) comprises an input end (3a) and an output end (3b) which are arranged non-coaxially and connected in a reduction transmission manner, wherein the input end (3a) is connected to the power shaft (1) and rotates synchronously, and the output end (3b) is connected to the crankshaft (2) and rotates synchronously.

2. The asynchronous compressor according to claim 1, characterized in that: The crankshaft (2) and the power shaft (1) are arranged along different axial directions.

3. The asynchronous compressor according to claim 2, characterized in that: The crankshaft (2) and the power shaft (1) are perpendicular to each other.

4. The asynchronous compressor according to claim 3, characterized in that: The reversing reducer (3) is a right-angle reducer (3).

5. The asynchronous compressor according to claim 3, characterized in that: The pump body (5) is placed vertically, and the crankshaft (2) is perpendicular to the installation surface.

6. The asynchronous compressor according to claim 3, characterized in that: The pump body (5) is placed horizontally, and the crankshaft (2) is arranged non-vertically to the installation surface.

7. The asynchronous compressor according to claim 1, characterized in that: The invention also comprises a hollow shell (6), wherein the internal space of the shell (6) comprises a motor-side accommodating chamber (61) for accommodating the motor (4) and the power shaft (1), a pump-body-side accommodating chamber (62) for accommodating the pump body (5) and the crankshaft (2), and a reducer accommodating chamber (63) for accommodating the reversing reducer (3), wherein the reducer accommodating chamber (63) is located between the motor-side accommodating chamber (61) and the pump-body-side accommodating chamber (62).

8. The asynchronous compressor according to claim 7, characterized in that: The motor-side accommodating chamber (61), the reducer accommodating chamber (63) and the pump body-side accommodating chamber (62) are sequentially connected to form an L-shaped cavity.

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