CN101684785A - Compressor - Google Patents

Abstract

The invention relates to a compressor, comprising a shell, a coolant compression device, an outer rotor type motor and a fixing piece. Wherein the coolant compression device is housed within the shell. The outer rotor type motor includes a crankshaft, an outer rotor, an inner stator, and at least one bearing. The crankshaft is connected with a coolant compression device; the outer rotor is fixed on the crankshaft; the inner stator is positioned in the outer rotor; and at least one bearing is arranged between the inner stator and the crankshaft. The fixing piece is used for fixing the inner stator on the shell. Therefore, the compressor of the invention can provide larger torsion force while being compact.

Description

compressor

technical field

The invention relates to a compressor, especially a compressor with an outer rotor motor.

Background technique

Generally speaking, a compressor is driven by a motor composed of a rotor and a stator. Most motors on the market today are composed of a stator on the outside and a rotor on the inside. In the prior art, the compressor using the inner rotor type single-phase fixed-speed motor has poor efficiency and the motor has a large volume. Although the compressor using the inner rotor type brushless DC motor can improve the efficiency of the motor, it still cannot solve the problem of the large volume of the motor.

Recently, there is also an external rotor motor, the rotor of the motor is placed on the outside, and the stator is placed on the inside. Although the volume of the motor can be greatly reduced, the torque it can generate is small, and it is only suitable for remote control aircraft, etc. A device with low torque requirements.

Therefore, it is necessary to provide a compressor with an outer rotor motor to improve the problems existing in the prior art.

Contents of the invention

The object of the present invention is to provide a compressor which uses an external rotor motor as a driving device for coolant compression.

To achieve the above object, the compressor for air conditioning system of the present invention includes a casing, a coolant compressing device, an outer rotor motor and a fixing member. Wherein, the coolant compression device is housed in the casing. The outer rotor motor includes a crankshaft, an outer rotor, an inner stator and at least one bearing. The crankshaft is connected with the coolant compression device; the outer rotor is fixed on the crankshaft; the inner stator is located in the outer rotor; and at least one bearing is arranged between the inner stator and the crankshaft. The fixing part is used for fixing the inner stator to the casing.

Therefore, the compressor of the present invention can provide relatively large torque while having a compact volume.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of a compressor of the present invention.

Fig. 2 is a schematic diagram of another embodiment of the compressor of the present invention.

Wherein, the reference signs are explained as follows:

Compressor 1, 1a Coolant compression device 10

Outer rotor motor 2, 2a crankshaft 20

Plate body 22 The fourth cooling hole 24

Outer rotor 30 Second cooling hole 32

Inner stator 40, 40a First cooling holes 42, 42a

Fixing parts 50, 50a Third cooling holes 52

Bearing 60 Balance weight 70

Shell 90

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be enumerated below and described in detail in conjunction with the accompanying drawings.

Please refer to FIG. 1 , which is a schematic diagram of an embodiment of a compressor of the present invention. The compressor 1 can be used in air-conditioning systems (such as air conditioners, refrigerators, etc.), and the compressor 1 can be vertical or horizontal. The compressor 1 mainly includes a casing 90 , a coolant compressing device 10 and an outer rotor motor 2 .

Wherein, the housing 90 is used to accommodate the coolant compression device 10 and the outer rotor motor 2, and the coolant compression device 10 and the outer rotor motor 2 are fixed to the housing 90, so that the compressor 1 reduces vibration and noise during operation. . Wherein, the housing 90 may be a high-pressure housing or a low-pressure housing.

The coolant compressing device 10 is accommodated in the housing 90 . The coolant compression device 10 is a common type of coolant compression device, for example, it can be a reciprocating type, a rotary type, a scroll type, and the like. Since the coolant compressing device 10 is known in the art, its detailed structure will not be repeated here. Regarding the fixing method of the coolant compressing device 10 , in this embodiment, the periphery of the coolant compressing device 10 and the housing 90 are fixed by welding (such as carbon dioxide welding).

The outer rotor motor 2 mainly includes a crankshaft 20 , an outer rotor 30 and an inner stator 40 . For example, the outer rotor motor 2 can be a brushless DC motor, which has high performance. In this embodiment, the outer rotor motor 2 is located above the coolant compressing device 10 , but the outer rotor motor 2 may also be located below the coolant compressing device 10 . The advantage of using the external rotor motor 2 is that under the same torque output, the volume can be reduced by about half, thus saving materials and reducing costs.

The crankshaft 20 is connected to the coolant compressing device 10 . Further, the coolant compressing device 10 has a shaft hole, and the inner diameter of the shaft hole matches the outer diameter of the crankshaft 20 so that the crankshaft 20 can just fit into the shaft hole. Therefore, the power generated by the outer rotor motor 2 can be output through the crankshaft 20 to drive the coolant compression device 10 .

The crankshaft 20 also includes a disc 22 that is substantially the same shape as the outer side of the outer rotor 30 . The disc body 22 is fixed on the outer side of the outer rotor 30 by fasteners (such as screws, bolts or rivets, etc.), and the crankshaft 20 and the outer rotor 30 are connected through the disc body 22 so that the crankshaft 20 and the outer rotor 30 can rotate synchronously.

Since the coolant compressing device 10 in this embodiment is a single cylinder, it will produce unbalanced operation. In order to solve this problem, a balance weight 70 is used. The balance weight 70 is close to the peripheral portion of the disk body 22 , and the disk body 22 is fixed between the balance weight 70 and the outer rotor 30 . When the outer rotor motor 2 is running, the balancing weight 70 can produce a balancing effect. However, it should be noted that if the coolant compressing device 10 is a double cylinder or a scroll cylinder, the balance weight 70 may not be used.

Most of the inner stator 40 is located inside the outer rotor 30 , and a bearing 60 is provided between the inner stator 40 and the crankshaft 20 to avoid direct friction between the inner stator 40 and the crankshaft 20 . The number of bearings 60 can be configured as one or more depending on the length of the crankshaft 20 . When the length of the inner stator 40 is small, only one bearing 60 can be set, which is located at the center of the inner stator 40 (as shown in Figure 1); when the length of the inner stator 40 is longer, multiple bearings 60 can be set to reduce The shaking degree of the crankshaft 20 and the motor 2.

One side of the inner stator 40 is not wrapped in the outer rotor 30 , but exposed on the outer edge of the outer rotor 30 . In order to stabilize the inner stator 40 , a fixing member 50 is used to fix the inner stator 40 to the housing 90 . In this embodiment, the cross section of the fixing member 50 is in an inverted U shape, and its shape is generally disc-shaped. The fixing member 50 can lock the inner stators 40 to each other through a locking member. In addition, the outer edge of the fixing member 50 is welded (such as emboss welding) on the housing 90. The material of the fixing part 50 can be selected according to the requirements. For example, it can be a sheet metal part. If the strength of the sheet metal part is not enough to meet the requirements, cast iron can be used instead.

Since the compressor 1 is running, the inner stator 40 of the outer rotor motor 2 is in a high temperature state. In order to help heat dissipation, the outer rotor motor 2 has a heat dissipation channel inside, which passes through the inner stator 40 and the outer rotor 30 , so that the coolant passes through the heat dissipation channel to dissipate heat to the inner stator 40 . The heat dissipation flow channel can be jointly formed by a plurality of heat dissipation holes.

In this embodiment, one side of the inner stator 40 includes at least one first cooling hole 42, one side of the outer rotor 30 includes at least one second cooling hole 32, the fixing member 50 includes at least one third cooling hole 52, and the disc body 22 includes at least one fourth cooling hole 24 . Wherein, the position of the third heat dissipation hole 52 matches the position of the first heat dissipation hole 42 , and the position of the second heat dissipation hole 32 matches the position of the fourth heat dissipation hole 24 .

The gaps between the first heat dissipation hole 42 , the second heat dissipation hole 32 , the third heat dissipation hole 52 , the fourth heat dissipation hole 24 and the inner stator 40 jointly form a heat dissipation channel for coolant circulation. The coolant is guided into the inner stator 40 through the fourth heat dissipation hole 24 and the second heat dissipation hole 32 , and then passed through the first heat dissipation hole 42 and the third heat dissipation hole 52 for the coolant to flow out.

Please refer to FIG. 2 , which is a schematic diagram of another embodiment of the compressor of the present invention. The biggest difference from the above-mentioned embodiment is that the fixing part 50a is only partly contacted and locked with the inner stator 40a, and the inner stator 40a penetrates through the fixing part 50a, so the fixing part 50a does not have a cooling hole design, and the first cooling hole of the inner stator 40a 42a may be used for coolant to flow out of the outer rotor motor 2a.

Therefore, the compressor of the present invention can provide relatively large torque while having a compact volume.

In summary, the present invention has different characteristics from the prior art in terms of purpose, means and effect. However, it should be noted that the above-mentioned embodiments are only illustrative to illustrate the principles and functions of the present invention, and are not intended to limit the scope of the present invention. The scope of protection required by the present invention should be defined by the appended claims.

Claims (10)

1. compressor comprises:

One housing;

One freezing mixture compression set is placed in this housing;

One outer rotor-type motor comprises:

One bent axle connects this freezing mixture compression set;

One external rotor is fixed in this bent axle;

One inner stator is positioned at this external rotor; And

At least one bearing, it is located between this inner stator and this bent axle; And

One fixed block, this fixed block is in order to be fixed in this housing with this inner stator.

2. compressor as claimed in claim 1, wherein this outer rotor-type motor also comprises a heat radiation runner, described heat radiation runner connects this inner stator and this external rotor.

3. compressor as claimed in claim 2, wherein this heat radiation runner comprises at least one first radiation hole and at least one second radiation hole, and this at least one first radiation hole is positioned at this inner stator one side, and this at least one second radiation hole is positioned at this external rotor one side.

4. compressor as claimed in claim 3, wherein this heat radiation runner also comprises at least one the 3rd radiation hole, wherein this at least one the 3rd radiation hole is positioned at this fixed block, and the position of this first radiation hole cooperates the position of the 3rd radiation hole.

5. compressor as claimed in claim 4, wherein this bent axle also comprises a disk body, this disk body is fixed in a side of this external rotor, by this disk body to link this bent axle and this external rotor.

6. compressor as claimed in claim 5, wherein this heat radiation runner also comprises at least one hot hole that scatters, this at least one hot hole that scatters is positioned at this disk body, and the position of this second radiation hole cooperates this position that scatters hot hole.

7. compressor as claimed in claim 5 also comprises an equilibrium block, and this equilibrium block is fixed in a side of this disk body.

8. compressor as claimed in claim 1, wherein the cross section of this fixed block is reverse U shape, and the material of this fixed block is cast iron or panel beating.

9. as claim 1 or 8 described compressors, wherein a side of this fixed block is fixed at this inner stator, and the opposite side of this fixed block is welded in this housing.

10. compressor as claimed in claim 1, wherein this outer rotor-type motor is a Brushless DC motor.

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