Silencing cover, rolling rotor type compressor and air conditioner

Abstract

The utility model discloses a silencing cover, a rolling rotor type compressor and an air conditioner. The silencing cover comprises a bottom plate, a cavity, a collecting cavity and an exhaust cavity, the cavity is formed in the bottom plate, and the cavity is a cavity protruding upwards; the collecting cavity and the exhaust cavity are arranged on the side wall of the cavity; and the bottom plate is fixed on an upper bearing seat plane of the compressor. According to the structure, the air flow which is vertically and upwards discharged before the compressor is guided to the lower part of the compressor shell. The problems that when the compressor runs, high-pressure refrigerant airflow which is vertically and upwards exhausted impacts the balance block on the lower end face of the motor rotor rotating at a high speed, refrigerant gas is cut, lubricating oil in the refrigerant gas is atomized and is more easily brought out of the compressor by the refrigerant gas, a pump body of the compressor is lack of oil, and the compressor is damaged are effectively solved. And the pump body is ineffective due to insufficient lubrication.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, and in particular to a silencing cover, a rolling rotor compressor and an air conditioner. Background Art

[0002] The structure of the existing rolling rotor compressor is as Figure 5 shown, which mainly consists of a housing 8, a motor 9 in the upper part of the housing cavity, a liquid receiver 10 on one side of the housing, and a pump body in the lower part of the housing. The pump body mainly includes an upper bearing seat 2, a lower bearing seat 3, a cylinder 4, a piston 5, a crankshaft 6 and a sliding vane 7. To reduce the noise of the compressor, a silencing cover is usually installed on the upper bearing seat.

[0003] In the existing silencing cover structure of the rolling rotor compressor, a lower balance weight 911 is provided at the lower end of the motor rotor 91 to balance the centrifugal inertial force and inertial moment caused by the eccentric rotation of the crankshaft 6. When the compressor works, the motor 9 drives the crankshaft 6 and the piston 5 of the pump body to rotate. The high-pressure refrigerant gas compressed in the cylinder 4 pushes open the exhaust valve plate on the end face of the upper bearing seat 2 and enters the silencing cover 1, and then is discharged from the exhaust cavity 1222 of the silencing cover. The exhaust of the compressor is periodic and changes with the power frequency. The single-rotor compressor exhausts once per rotation, and the double-rotor compressor exhausts twice. Since the direction of the discharged high-pressure refrigerant gas flow is vertically upward, it will directly impact the balance weight 911 on the lower end face of the high-speed rotating motor rotor 91. The cross-section of the balance weight 911 is mostly a semi-circular ring structure, which cuts the refrigerant gas, atomizes the lubricating oil in the refrigerant gas, strengthens the fluidity of the oil droplets, and is more likely to be carried out of the compressor by the refrigerant gas, resulting in oil shortage in the pump body of the compressor, and then insufficient lubrication of the pump body leading to failure. At the same time, the periodic impact of the discharged refrigerant gas on the motor rotor 91 will also cause its axial movement, resulting in a noise peak of about 1600HZ in the compressor, leading to excessive noise. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a silencing cover, a rolling rotor compressor and an air conditioner to solve the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a silencing cover, which includes a bottom plate, a cavity, a collection cavity and an exhaust cavity; the cavity is arranged on the bottom plate, and the cavity is a cavity protruding upward; the collection cavity and the exhaust cavity are arranged on the side wall of the cavity; the bottom plate is fixed on the plane of the upper bearing seat of the compressor.

[0007] Optionally, the cavity is a left-right symmetric cavity, the side wall of the cavity is a vertical wall surface, and the included angle between the vertical wall surface and the bottom plate is θ, where 80° ≤ θ ≤ 90°.

[0008] Optionally, the height of the vertical wall is h, and the diameter of the exhaust hole of the upper bearing seat of the compressor is set as d, then 1.5d ≤ h.

[0009] Optionally, a collection cavity is distributed on the inner wall of the vertical wall, and an exhaust cavity is distributed on the outer wall on the other side symmetrically. The outlet of the exhaust cavity faces the bottom plate, and the opening of the collection cavity is away from the exhaust hole of the upper bearing seat of the compressor. After the gas is collected by the collection cavity, it flows out from the exhaust cavity; the volume of the collection cavity is a, and the exhaust cavity is b, then a / b ≥ 1.1.

[0010] Optionally, the number of the collection cavities and the exhaust cavities on the vertical wall of the sound insulation cover is the same and is an even number, and the even-numbered collection cavities and exhaust cavities are symmetrically distributed along the left-right symmetry axis of the cavity body.

[0011] Optionally, the included angle between the outlet of the exhaust cavity on the vertical outer wall and the bottom plate is β, then β ≤ 30°.

[0012] Optionally, the area of the outlet of a single exhaust cavity on the vertical outer wall is m, and the area of the exhaust hole of the upper bearing seat of the compressor is n, then m / n ≥ 1.

[0013] Optionally, a plurality of fixing parts are arranged on the bottom plate at intervals for fixing the sound insulation cover on the plane of the upper bearing seat of the compressor; a central hole is arranged at the center position of the upwardly convex cavity body, and the central hole is used for sleeving on the neck of the upper bearing seat of the compressor.

[0014] In a second aspect, the present invention provides a rolling piston compressor, including a compressor and the sound insulation cover structure described above.

[0015] In a third aspect, the present invention provides an air conditioner, including a rolling piston compressor.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] For the sound insulation cover of the present invention, the included angle between the outlet of the exhaust cavity on the vertical outer wall of the upwardly convex cavity body and the bottom plate is β, then β ≤ 30°. This structure guides the airflow that was vertically discharged upward by the compressor before to the lower part of the compressor housing. Avoiding the lower balance block of the motor rotor, it effectively solves the problem that when the compressor operates, the high-pressure refrigerant airflow discharged vertically upward impacts the balance block at the lower end face of the high-speed rotating motor rotor, cuts the refrigerant gas, atomizes the lubricating oil in the refrigerant gas, and is more easily carried out of the compressor by the refrigerant gas, resulting in oil shortage in the compressor pump body and further lubrication insufficiency of the pump body leading to failure.

[0018] The gas discharged from the upper bearing seat of the present invention is collected by the collection cavity and then flows out from the exhaust cavity, which lengthens the flow path of the gas and reduces the exhaust noise value of the compressor. At the same time, the symmetrical exhaust cavity structure also makes the exhaust noises cancel each other out in phase, further reducing the total noise value.

[0019] The present utility model further provides an air conditioner, which includes the aforementioned rolling piston compressor. The application of the muffler cover with such a structure in the compressor can guide the high-pressure refrigerant gas flow discharged vertically upward to the lower part of the compressor housing, change the direction of the refrigerant gas flow, avoid the impact of the gas flow on the balance weight, prevent the atomization of lubricating oil droplets, reduce the oil carry-over amount of the compressor, and improve the operation reliability. Description of the Drawings

[0020] Figure 1 The front view of the muffler cover 1 provided for the implementation of the present utility model;

[0021] Figure 2 The A-A cross-sectional view of the muffler cover 1 provided for the implementation of the present utility model;

[0022] Figure 3 The front view of the muffler cover 1 provided for the implementation of the present utility model;

[0023] Figure 4 The schematic diagram of the upper bearing seat 2 provided for the implementation of the present utility model;

[0024] Figure 5 Schematic diagram of the structure of the rolling piston compressor.

[0025] 1 - Muffler cover; 11 - Bottom plate; 12 - Cavity; 121 - Central hole; 122 - Vertical wall surface; 1221 - Collection cavity; 1222 - Exhaust cavity; 2 - Upper bearing seat; 21 - Bearing seat exhaust hole; 3 - Lower bearing seat; 4 - Cylinder; 5 - Piston; 6 - Crankshaft; 7 - Sliding vane; 8 - Housing; 9 - Motor; 91 - Motor rotor; 911 - Lower balance weight; 10 - Liquid receiver. Detailed Embodiment

[0026] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that for terms indicating orientation or positional relationship such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, for terms such as "first", "second", "third", they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, for terms such as "installation", "connection", "linkage", they 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] As Figure 5 shown, the existing compressor exhaust structure includes a housing 8, a motor 9 in the upper part of the housing cavity, a liquid receiver 10 on one side of the housing, and a pump body at the lower part of the housing. The pump body mainly includes an upper bearing seat 2, a lower bearing seat 3, a cylinder 4, a piston 5, a crankshaft 6, and a sliding vane 7. To reduce the noise of the compressor, a silencer cover 1 is installed on the upper bearing seat. When the compressor works, the motor 9 drives the crankshaft 6 and the piston 5 of the pump body to rotate, and the high-pressure refrigerant gas compressed in the cylinder 4 pushes open the exhaust valve plate located at the end face of the upper bearing seat 2 and enters the silencer cover 1, and then discharges from the exhaust cavity of the silencer cover.

[0030] As Figure 2 shown, a silencer cover 1 of the present utility model includes a collection cavity 1221 and an exhaust cavity 1222.

[0031] As Figure 1 shown, the silencer cover 1 of the present utility model includes a bottom plate 11 and a cavity 12 that protrudes upward. A plurality of fixing parts are arranged at intervals on the bottom plate 11 for fixing the silencer cover 1 on the plane of the upper bearing seat 2 of the compressor. A central hole 121 is arranged at the center position of the cavity 12 that protrudes upward, and the central hole is used to sleeve the neck of the upper bearing seat 2 of the compressor. At least two exhaust cavities 1222 with downward outlets are arranged on the vertical wall surface 122 of the cavity 12.

[0032] As Figure 1 shown, the cavity 12 that protrudes upward of the silencer cover 1 of the present utility model is a left-right symmetric cavity, and its axis of symmetry is O - O'.

[0033] As Figure 3 shown, the silencer cover 1 of the present utility model has a vertical wall surface 122, and the included angle between the vertical wall surface and the bottom plate 11 is θ, where 85° ≤ θ ≤ 90°.

[0034] As Figure 1 、 4 shown, the height of the vertical wall surface 122 of the silencer cover 1 of the present utility model is h. Assuming the diameter of the exhaust hole 21 of the upper bearing seat 2 of the compressor is d, then 1.5d ≤ h.

[0035] As Figure 2 shown, collection cavities 1221 are distributed on the inner wall of the vertical wall surface 122 of the silencer cover 1 of the present utility model, and exhaust cavities 1222 are distributed on the outer wall correspondingly. Assuming the volume of the collection cavity is a and the exhaust cavity is b, then a / b ≥ 1.1.

[0036] As Figure 1 、 2 shown, the number of the collection cavities 1221 and the exhaust cavities 1222 on the vertical wall surface of the silencer cover 1 of the present utility model is the same and is an even number. The even-numbered collection cavities 1221 and exhaust cavities 1222 are symmetrically distributed along the axis O - O’. The gas discharged from the upper bearing seat 2 is collected by the collection cavities 1221 and then flows out from the exhaust cavities 1222, which lengthens the gas flow path and reduces the exhaust noise value of the compressor. At the same time, the symmetrical structure of the exhaust cavities 1222 also makes the exhaust noises cancel each other out in terms of phase, further reducing the total noise value.

[0037] The included angle between the outlet of the exhaust cavity 1222 on the vertical outer wall of the silencer cover 1 of the present utility model and the bottom plate 11 is β, then β ≤ 30°. This structure guides the airflow that was vertically discharged upward before the compressor to the lower part of the compressor housing. Avoiding the lower balance weight of the motor rotor effectively solves the cutting of the refrigerant gas by the balance weight 21 and the impact of the periodically discharged refrigerant gas on the motor rotor 2.

[0038] As Figure 3 、 4 shown, the outlet area of the exhaust cavity 1222 on the vertical outer wall of the upwardly convex cavity 12 of the silencer cover 1 of the present utility model is m, and the area of the exhaust hole 21 of the upper bearing seat 2 of the compressor is n, then m / n ≥ 1.

[0039] The present utility model also provides a rolling rotor compressor, which includes the aforementioned silencer cover structure. The exhaust of the rotary compressor is periodic and changes with the power frequency. A single-rotor compressor exhausts once per revolution, while a double-rotor compressor exhausts twice. This silencer cover can direct the vertically upward discharged high-pressure refrigerant gas flow to the lower part of the compressor housing, thereby avoiding the impact of the refrigerant gas on the motor rotor 91. This periodic impact force can cause axial movement of the compressor crankshaft and the motor rotor, resulting in a noise peak of about 1600 HZ in the compressor.

[0040] The present utility model also provides an air conditioner, which includes the aforementioned rolling rotor compressor. The application of this silencer cover structure in the compressor can direct the vertically upward discharged high-pressure refrigerant gas flow to the lower part of the compressor housing, changing the direction of the refrigerant gas flow, avoiding the impact of the gas flow on the balance weight, preventing the atomization of lubricating oil droplets, reducing the oil carrying capacity of the compressor, and improving the operation reliability.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the above embodiments, or perform equivalent replacements for some or all of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A soundproof cover, characterized in that: The invention comprises a bottom plate (11), a cavity (12), a collecting cavity (1221) and an exhaust cavity (1222); the cavity (12) is arranged on the bottom plate (11), and the cavity (12) is an upwardly protruding cavity; the collecting cavity (1221) and the exhaust cavity (1222) are arranged on the side wall of the cavity (12); and the bottom plate (11) is fixed on the upper bearing seat plane of the compressor.

2. A soundproof cover according to claim 1, characterized in that: The cavity (12) is a bilaterally symmetrical cavity, the side wall of the cavity (12) is a vertical wall surface (122), the included angle between the vertical wall surface and the bottom plate (11) is θ, and 80°≤θ≤90°.

3. A soundproof cover according to claim 2, characterized in that: The height of the vertical wall (122) is h, and the diameter of the exhaust hole of the bearing seat on the compressor is set to d, then 1.5d≤h.

4. A soundproof cover according to claim 3, characterized in that: A collecting chamber (1221) is distributed on the inner wall of the vertical wall (122), and an exhaust chamber (1222) is distributed on the outer wall on the other side symmetrically therewith; the outlet of the exhaust chamber (1222) faces the bottom plate (11), and the opening of the collecting chamber (1221) is away from the exhaust hole of the bearing seat on the compressor; the gas is collected by the collecting chamber (1221) and then flows out from the exhaust chamber (1222); the volume of the collecting chamber is a, and the volume of the exhaust chamber is b, then a / b≥1.

1.

5. A soundproof cover according to claim 2, characterized in that: The number of collecting chambers (1221) and exhaust chambers (1222) on the vertical wall of the silencer cover is the same and is an even number, and the even number of collecting chambers (1221) and exhaust chambers (1222) are symmetrically distributed along the left-right symmetry axis of the chamber body (12).

6. A soundproof cover according to claim 1, characterized in that: The included angle between the outlet of the exhaust cavity (1222) on the vertical outer wall and the bottom plate (11) is β, and β is ≤ 30°.

7. A soundproof cover according to claim 1, characterized in that: The outlet area of ​​a single exhaust cavity (1222) on the vertical outer wall is m, and the exhaust hole area of ​​the bearing seat on the compressor is n, then m / n≥1.

8. The soundproof cover according to claim 1, characterized in that: A plurality of fixing parts are arranged at intervals on the bottom plate (11) for fixing the silencer cover on the plane of the upper bearing seat of the compressor; a center hole (121) is arranged at the center position of the upwardly protruding cavity (12), and the center hole (121) is used to be sleeved on the neck of the upper bearing seat of the compressor.

9. A rolling rotor compressor, characterized in that: The utility model comprises a compressor and the sound-absorbing cover structure according to any one of claims 1 to 8.

10. An air conditioner, characterized in that: Including the rolling rotor compressor as described in claim 9.

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