Horizontal fairing and horizontal compressor

Abstract

The horizontal fairing comprises a fairing body, the bottom of the fairing body extends outwards to form a bottom edge, the end, away from the fairing body, of the bottom edge is bent towards one side of the top of the fairing body to form a side turnup edge, and the side turnup edge is bent towards the other side of the top of the fairing body. The end, away from the bottom edge, of the side turnup is bent towards the side, away from the cover body, of the side turnup to form a top turnup, the angle alpha between the first turnup and the bottom edge is larger than or equal to 70 degrees and smaller than or equal to 90 degrees, and a side hole is formed in the side wall of the cover body. Compared with the prior art, the oil outlet amount and the system oil content of the horizontal compressor are reduced, and therefore the cold force and the energy efficiency of the compressor are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressors, and relates to a horizontal fairing and a horizontal compressor. BACKGROUND

[0002] The horizontal compressor has the advantages of low gravity center and small vibration, and is widely used in application systems such as refrigerators and air conditioners. The structure of the horizontal compressor generally comprises a shell, a motor, a compression component and a fairing, the shell is provided with an exhaust port, the motor comprises a rotor and a stator, and the fairing is arranged between the motor and the compression component. The fairing is used to control the exhaust flow path of the compressor, so that the gas discharged by the compression component is discharged to the exhaust port in the shell according to a predetermined path.

[0003] Patent CN208364336U discloses a fairing and a horizontal compressor thereof, the fairing comprises a cylinder and a fin, the cylinder is a hollow structure with open ends, and a plurality of fins are arranged on the outer wall of the cylinder in a circumferential direction. In actual use, the exhaust gas flow will be affected by the fins when passing through the space between the fairing and the compressor shell, and will change direction to generate a cyclone. In this process, because the mass of oil droplets and gaseous refrigerant is different, the exhaust gas flow will separate oil and gas during the change of flow direction, thereby reducing the oil discharge rate of the exhaust. However, the structure is relatively complex and the cost is high.

[0004] At present, the common fairing structure of the horizontal compressor is that one section of the flange is fitted on the cylinder head to be chamfered, and the other section of the flange is upwardly raised. This existing fairing design of the horizontal compressor has a simple structure, but the gap between the fairing and the upper cylinder cover is small, the flow area is small, the flow velocity is large, the exhaust gas is easy to carry oil, and there is a high oil discharge rate problem at high speed, which leads to low cooling capacity and poor energy efficiency. SUMMARY

[0005] The purpose of the present application is to overcome at least one of the above-mentioned defects in the prior art, and to provide a horizontal fairing and a horizontal compressor, which reduces the oil discharge amount and system oil content of the horizontal compressor, thereby improving the cooling capacity and energy efficiency of the compressor.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] One of the technical solutions of the present application is to provide a horizontal fairing, which comprises a fairing body having an open end and a closed end, the open end of the fairing body extends outwardly and is provided with a bottom edge, the bottom edge is bent towards the closed end of the fairing body and is provided with a first flange, the first flange is bent towards the side away from the fairing body and is provided with a second flange, the angle between the first flange and the bottom edge is 70°≤α≤90°, and at least one side hole for upward air exhaust is formed in the side wall of the fairing body. The structure of the first flange can make the gas discharged from the side hole flow along the first flange to the motor side, so that the gas can collide with the gas flowing from the motor side to the pump side, and the ability of the gas flowing from the motor side to the pump side to carry oil mist is reduced.

[0008] Further, the angle θ between the second flange and the central axis of the fairing body is 70°≤θ≤135°, the structure of the second flange ensures that the air exhaust flow channel has a proper flow area and is beneficial to oil droplet settlement, and the angle θ exceeding the set angle is not conducive to oil blocking and also makes the flow area too large to be not conducive to motor cooling, so the angle θ needs to be ensured within the set range.

[0009] Further, in the vertical plane of the central axis of the fairing body, in the plane rectangular coordinate system with the projection of the center of the fairing body as the origin, the angle Φ between the connecting line of the projection of the side hole and the projection of the center of the fairing body and the horizontal axis x of the coordinate system satisfies 45°≤Φ≤135°, within the angle range, it can be ensured that the gas discharged from the side hole is upward air exhaust rather than downward air exhaust, and the upward air exhaust of the gas from the side hole has a better collision effect on the gas flowing from the motor side to the pump side, and the angle Φ exceeding the set angle will affect the collision effect of the gas discharged from the side hole or even have no effect.

[0010] Further, a central hole is arranged in the center of the closed end of the fairing body, the central hole is provided for the central axis of the upper cylinder cover to pass through and forms an air exhaust passage with the upper cylinder cover.

[0011] Further, the central hole is formed by folding the central part of the closed end of the fairing body towards the side away from the bottom edge.

[0012] The second technical solution of the present application is to provide a horizontal compressor, which comprises an upper cylinder cover and any one of the horizontal fairings described above, the upper cylinder cover comprises a cover body, a central axis is arranged in the center of the end face of the cover body, a groove is arranged around the central axis on the end face of the cover body, a top surface groove wall is arranged on the outer periphery of the groove, and the fairing is sleeved on the central axis.

[0013] Further, the bottom edge is fitted in the groove, and the first flange and the second flange need to be kept a distance from the upper cylinder cover.

[0014] Further, the cover is provided with a waist-shaped hole, a distance H between a central axis of the waist-shaped hole and a central axis of the cover, and a distance h between the bottom edge and the farthest distance of the central axis of the cover, both satisfying H >= h, so that the first flange does not cover the waist-shaped hole, thereby affecting the exhaust flow channel and the flow area.

[0015] Further, an angle A between the groove wall and the groove is 90 <= A <= 135.

[0016] The third technical solution of the present application provides an assembling method of the horizontal compressor, which comprises the following steps:

[0017] The central axis of the upper cylinder cover passes through the central hole of the fairing, the bottom edge of the fairing is attached to the groove of the upper cylinder cover, the distance between the first flange and the second flange of the fairing and the upper cylinder cover is adjusted, both of which are away from the upper cylinder cover, and the fairing is fixed on the upper cylinder cover.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] (1) The flange design of the present application includes two sections, wherein the first section flange design, i.e. the flange angle of the first flange, is relatively small, i.e. the angle a between the first flange and the bottom edge is controlled to be 70 <= a <= 90, and a side hole is additionally provided on the side wall of the cover body, so that the gas discharged from the side hole can flow along the first flange to the motor side, and the gas flowing from the motor side to the pump body side can be buffered, so as to reduce the flow rate of the gas flowing from the motor side to the pump body side, and also reduce the oil mist carried in the gas, thereby reducing the oil discharge amount of the compressor;

[0020] (2) The second section flange design of the present application, i.e. the second flange is an outward flange, and the folding angle is relatively large, i.e. the angle theta between the second flange and the central axis of the cover body ranges from 70 <= theta <= 135, within this angle range, not only can the lubricating oil be blocked and settled, thereby reducing the oil discharge rate of the compressor, but also the exhaust flow channel can have a proper flow area;

[0021] (3) The present application reduces the oil mist carried in the gas flow and the oil discharge amount of the compressor by designing the structure angle of the first section flange and setting the upward exhaust side hole and its angle to reduce the exhaust flow rate and change the flow type of the exhaust flow path; and on this basis, further combining the design of the structure angle of the second section flange, the exhaust oil can be further reduced, thereby greatly reducing the oil discharge rate of the compressor, and at the same time, the exhaust flow area can be properly increased, and the performance can be more effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1A sectional structure schematic diagram of a horizontal fairing in the prior art;

[0023] Figure 2 An assembly schematic diagram of the horizontal fairing and an upper cylinder cover in the prior art;

[0024] Figure 3 An oil-gas distribution nephogram of the horizontal fairing in the prior art;

[0025] Figure 4 A sectional structure schematic diagram of a horizontal fairing in the embodiment 1 of the present application;

[0026] Figure 5 A top view structure schematic diagram of the horizontal fairing in the embodiment 1 of the present application;

[0027] Figure 6 An assembly schematic diagram of the horizontal fairing and an upper cylinder cover in the embodiment 1 of the present application;

[0028] Figure 7 An oil-gas distribution nephogram of the horizontal fairing in the embodiment 1 of the present application;

[0029] Figure 8 A comparison diagram of single-period oil discharge of an exhaust pipe of a horizontal compressor in the prior art and the embodiment 1 of the present application;

[0030] Figure 9 A diagram of parameter improvement of the horizontal compressor in the embodiment 1 of the present application compared with the prior art;

[0031] Figure 10 A sectional structure schematic diagram of a horizontal fairing in the embodiment 2 of the present application.

[0032] Marking explanation in the diagram:

[0033] 1 - fairing, 11 - bottom edge, 12 - first flange, 13 - second flange, 14 - cover body, 15 - side hole, 16 - middle hole;

[0034] 2 - upper cylinder cover, 21 - top surface groove, 22 - top surface groove wall, 23 - waist-shaped hole, 24 - middle shaft. DETAILED DESCRIPTION

[0035] The present application will be described in detail below in combination with specific embodiments. The embodiments are implemented on the premise of the technical scheme of the present application, and detailed implementation manners and specific operation processes are given, but the protection scope of the present application is not limited to the following embodiments.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are used to describe common objects, only to indicate different instances of the same object, and are not intended to imply that the objects thus described must be in a given order, whether in time, space, order or any other manner.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" 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; it can be the communication inside two elements. 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.

[0038] Embodiment 1:

[0039] A horizontal fairing, as shown in Figure 4 and Figure 5 The fairing 1 comprises a fairing body 14, the fairing body 14 has an open end and a closed end, the open end of the fairing body 14 extends outwardly with a bottom edge 11, the end of the bottom edge 11 away from the fairing body 14 is bent to the side of the closed end of the fairing body 14 with a first flange 12, the end of the first flange 12 away from the bottom edge 11 is bent to the side away from the fairing body 14 with a second flange 13;

[0040] The angle α between the first flange 12 and the bottom edge 11 ranges from 70° to 90°, the side of the fairing body 14 is provided with a side hole 15 for upward exhaust, the side hole 15 is not visible in Figure 5 The first flange 12 can make the gas discharged from the side hole 15 flow along the first flange 12 to the motor side, so that the gas can collide with the gas flowing from the motor side to the pump body side, thereby reducing the flow rate of the gas flowing from the motor side to the pump body side, reducing the ability of the gas flowing from the motor side to the pump body side to carry oil mist, thereby reducing the oil discharge amount of the compressor, and in the present embodiment, it is preferred to be 90°;

[0041] The angle θ between the second flange 13 and the central axis of the cover 14 is in the range of 70°≤θ≤135°. The structure of the second flange 13 ensures that the exhaust channel has an appropriate flow area and is conducive to oil droplet settling. If the angle θ exceeds the set angle, it will not be conducive to oil blocking, and at the same time, it will make the flow area too large, which is not conducive to motor cooling. Therefore, the flange angle is limited. In this embodiment, it is preferably 90°.

[0042] On the vertical plane of the central axis of the cover 14, in the plane rectangular coordinate system with the projection of the axis of the cover 14 as the origin, the angle Φ between the line connecting the projection of the side hole 15 and the projection of the axis of the cover 14 and the horizontal axis x of the coordinate system is 45°≤Φ≤135°. Within this angle range, it can be ensured that the gas discharged from the side hole 15 is exhaust upward rather than blown downward. At the same time, the gas discharged upward from the side hole 15 has a better counteracting effect on the gas flowing from the motor side to the pump body side. If the angle Φ exceeds the set range, it will affect the counteracting effect of the gas discharged from the side hole 15 or even have no effect. In this embodiment, Φ is preferably 90°, that is, the center of the concave part of the side wall of the cover 14 is provided with an upward exhaust side hole 15.

[0043] In addition, there can be one or more side holes 15. Setting multiple side holes 15 can increase the counterforce against the gas flowing from the motor side to the pump body side, as long as all the multiple side holes 15 are within the Φ angle range.

[0044] A central hole 16 is provided in the center of the closed end of the cover 14 (that is, the central hole 16 is formed by folding the closed end of the cover 14 away from the bottom edge 11). The central hole 16 allows the central shaft 24 of the upper cylinder head 2 to pass through and forms an exhaust channel with the upper cylinder head 2.

[0045] This embodiment also provides a horizontal compressor, such as Figure 6 As shown, the system includes an upper cylinder head 2 and the aforementioned horizontal fairing. The upper cylinder head 2 includes a cover body. A central shaft 24 is provided at the center of one end face of the cover body. A groove 21 is provided around the central shaft 24 at one end face of the cover body. A groove wall 22 is provided on the outer periphery of the groove 21. The fairing 1 is fitted onto the central shaft 24, that is, the central shaft 24 of the upper cylinder head 2 passes through the central hole 14 of the fairing 1. The bottom edge 11 of the fairing 1 is attached to the groove 21 on the top surface of the upper cylinder head 2. The first flange 12 and the second flange 13 of the fairing 1 need to leave a certain distance from the upper cylinder head 2 to fix the fairing 1 onto the upper cylinder head 2.

[0046] The cover has an oblong hole 23. The distance H between the central axis of the oblong hole 23 and the central axis of the cover, and the farthest distance h between the bottom edge 11 and the central axis of the cover, satisfy: H≥h, so that the first flange 12 does not cover the oblong hole 23, thereby affecting the exhaust channel and flow area.

[0047] The angle A between the groove wall 22 and the groove 21 is 90°≤A≤135°, and the angle A is preferably 135° in this embodiment.

[0048] Prior art:

[0049] The prior art horizontal fairing structure is shown in Figure 1 The angle a between the first flange 12 and the bottom edge 11 is 135°, the angle θ between the second flange 13 and the central axis of the fairing body 14 is 180°, and the side wall of the fairing body 14 is not provided with a side hole 15, and the rest is the same as in embodiment 1.

[0050] The horizontal compressor with the above horizontal fairing structure is shown in Figure 2 The angle A between the top surface groove wall 22 and the top surface groove 21 is 135°.

[0051] The performance of the prior art and embodiment 1 horizontal compressors is compared:

[0052] Figure 3 The oil and gas distribution cloud chart of the prior art horizontal fairing is Figure 7 The oil and gas distribution cloud chart of the horizontal fairing in embodiment 1 (light blue represents oil and gas), from Figure 3 and Figure 7 It can be seen from the comparison that the fairing in the prior art has a small gap with the upper cylinder cover, so that the gas flow rate is large, the compressor exhaust is easy to carry oil, and a large amount of lubricating oil enters the left side of the pump body from the gap; and the design of the angle of the first flange 12 combined with the structure of the side hole 15 in embodiment 1 makes the gas discharged from the side hole 15 flow along the first flange 12 to the motor side, and makes it can buffer the gas flowing from the motor side to the pump body side, so as to reduce the flow rate of the gas flowing from the motor side to the pump body side, and further combined with the design of the second outward flange, i.e. the second flange 13, so that the gap between the fairing and the upper cylinder cover is increased, while ensuring that the exhaust flow passage has a proper flow area, it can also block the lubricating oil and facilitate its settlement, from Figure 7 It can be clearly seen that the lubricating oil entering the left side of the pump body with the exhaust is greatly reduced.

[0053] The prior art and embodiment 1 horizontal compressors are detected, and the single cycle average oil output comparison is obtained, as shown in Table 1.

[0054] Case Prior art Example 1 Improvement percentage Exhaust pipe oil outflow (kg / s) 0.059 0.028 52.54％

[0055] Table 1 Comparison of single cycle average oil output of horizontal compressors in prior art and embodiment 1

[0056] Figure 8 The comparison chart of the exhaust pipe port single cycle oil output of the prior art and embodiment 1 horizontal compressors; combined Figure 8As shown in Table 1, it can be seen that the oil outlet amount of the exhaust pipe in Example 1 is obviously improved compared with the prior art, and the oil outlet rate is reduced by 52.54%. The less the oil outlet amount of the exhaust pipe is, the lower the oil discharge rate of the compressor is, and the less the oil in the system is, and the better the heat exchange effect of the heat exchanger is, and the higher the cooling capacity is.

[0057] Further performance detection is conducted on the horizontal compressor in the prior art and Example 1.

[0058] Figure 9 For the parameter improvement graph of the horizontal compressor in Example 1 compared with the prior art, it can be seen that the OCR of the horizontal compressor in Example 1 is reduced by 39.02% compared with the prior art, the cooling capacity is increased by 2.62%, and the COP is increased by 2.44%.

[0059] It can be seen that the horizontal compressor with the structure of the application significantly reduces the oil outlet amount and the oil content rate in the system, and improves the cooling capacity and energy efficiency of the compressor.

[0060] Example 2

[0061] A horizontal fairing, which is different from Example 1 in that the angle α between the first flange 12 and the bottom edge 11 is 70°, and the angle θ between the second flange 13 and the central axis of the fairing body 14 is 70°, as shown in Figure 10 The horizontal compressor with the structure of Example 2 is detected in the same way as Example 1, and the average oil outlet amount per cycle is obtained as follows: the oil outlet amount of the exhaust pipe is 0.055 kg / s, which is reduced by 6.78% compared with the oil outlet rate of the prior art.

[0062] It can be seen that by controlling the angle α between the first flange 12 and the bottom edge 11 within the set range, and cooperating with the side hole 15 and the angle design thereof, the gas discharged from the side hole 15 can flow along the first flange 12 to the motor side, and buffer with the gas flowing to the pump body side from the motor side, so as to reduce the flow rate of the gas flowing to the pump body side from the motor side, and also reduce the oil mist carried in the gas, thereby effectively reducing the oil discharge amount of the compressor.

[0063] The above description of the examples is for the convenience of the ordinary skilled person in the technical field to understand and use the application. Those skilled in the art can easily make various modifications to these examples, and apply the general principles described herein to other examples without having to go through creative labor. Therefore, the application is not limited to the above examples, and the improvements and modifications made by those skilled in the art without departing from the scope of the application should be within the protection scope of the application.

Claims

1. A horizontal fairing characterized by, The fairing (1) comprises a cover body (14) having an open end and a closed end, the open end of the cover body (14) is outwardly folded to extend a bottom edge (11), one end of the bottom edge (11) away from the cover body (14) is bent to the side of the closed end of the cover body (14) to form a first flange (12), one end of the first flange (12) away from the bottom edge (11) is bent to the side away from the cover body (14) to form a second flange (13), the angle α between the first flange (12) and the bottom edge (11) is 70°≤α≤90°, and at least one side hole (15) is formed in the side wall of the cover body (14).

2. A horizontal fairing according to claim 1, characterized in that The angle θ between the second flange (13) and the central axis of the cover body (14) is 70°≤θ≤135°.

3. A horizontal fairing according to claim 1, wherein, In a plane rectangular coordinate system with the projection of the axis of the cover body (14) as the origin on the vertical plane of the central axis of the cover body (14), the angle Φ between the connecting line of the projection of the side hole (15) and the projection of the axis of the cover body (14) and the horizontal axis x of the coordinate system satisfies 45°≤Φ≤135°.

4. A horizontal fairing according to claim 1, wherein, A central hole (16) is arranged at the center of the closed end of the cover body (14).

5. A horizontal fairing according to claim 4, wherein, The central hole (16) is formed by folding the center of the closed end of the cover body (14) to the side away from the bottom edge (11).

6. A horizontal compressor characterized by The compressor comprises an upper cylinder cover (2) and a horizontal fairing as claimed in any one of claims 1 to 5, the upper cylinder cover (2) comprises a cover body, a central shaft (24) is arranged at the center of the end face of the cover body, a groove (21) is formed in the end face of the cover body around the central shaft (24), a groove wall (22) is arranged on the outer periphery of the groove (21), and the fairing (1) is sleeved on the central shaft (24).

7. A horizontal compressor as set forth in claim 6 wherein, The bottom edge (11) is fitted to the groove (21).

8. A horizontal compressor as set forth in claim 6 wherein, The cover body is provided with a waist-shaped hole (23), the distance H between the central axis of the waist-shaped hole (23) and the central axis of the cover body, and the farthest distance h between the bottom edge (11) and the central axis of the cover body satisfy H≥h.

9. A horizontal compressor as set forth in claim 6 wherein, The angle A between the groove wall (22) and the groove (21) is 90°≤A≤135°.

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