A rotary compressor

Abstract

The present invention provides a rotary compressor, comprising: a compressor body and a liquid reservoir; the compressor body and the liquid reservoir are connected through at least one air intake hole; the compressor body comprises: a shell; a motor and an upper cylinder head, a lower cylinder head and a cylinder assembly, which are accommodated in the shell; the cylinder assembly comprises at least one cylinder, the upper cylinder head and the lower cylinder head are respectively arranged on the upper end surface and the lower end surface of the cylinder assembly, forming a compression space for compressing refrigerant; an outer side wall of the compressor body away from the liquid reservoir is provided with at least one step, the step is located between the upper cylinder head and the lower cylinder head, so that the diameter of the shell at the upper cylinder head is greater than the diameter of the shell at the lower cylinder head. The present invention arranges a step on the outer side wall of the compressor body so that the installation support point of the compressor coincides with the center of gravity of the compressor, reduces the uneven force of the installation foot, reduces vibration and noise, and improves the stability and efficiency of the whole machine.

Description

Technical Field

[0001] The present invention relates to the field of compressors, in particular to a rotary compressor. Background Art

[0002] The existing rotary compressor consists of a compressor body and a liquid reservoir. A cylinder is provided in the shell of the compressor body. The compressor mounting feet are evenly distributed on the shell of the compressor body, so the mounting center does not overlap with the center of gravity of the compressor. Since the center of gravity of the compressor is slightly deviated from the mounting center and is located on the side close to the liquid reservoir, the three mounting feet may tilt due to uneven force during the packaging and transportation of the compressor and the installation of the air-conditioning system. Since the overall center of gravity of the compressor does not coincide with the center of the installation support point of the compressor, there is a height difference in the load height of the compressor shock-absorbing rubber feet, and the compressor rubber shock-absorbing feet are unevenly stressed. When the compressor is operating in the air-conditioning system, the piping will be subjected to a certain amount of stress, which will lead to an increase in noise and vibration, and a decrease in the reliability and efficiency of the compressor as a whole.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of the problems in the prior art, an object of the present invention is to provide a rotary compressor, whose mounting support point coincides with the overall center of gravity of the compressor, thereby reducing the vibration and noise of the compressor and improving the overall stability and efficiency of the compressor.

[0005] An embodiment of the present invention provides a rotary compressor, comprising:

[0006] A compressor body and a liquid reservoir; the compressor body and the liquid reservoir are connected through at least one suction hole;

[0007] The compressor body comprises:

[0008] case;

[0009] The motor, the upper cylinder cover, the lower cylinder cover and the cylinder assembly are accommodated in the housing; the cylinder assembly includes at least one cylinder, and the upper cylinder cover and the lower cylinder cover are respectively arranged on the upper end surface and the lower end surface of the cylinder assembly to form a compression space for compressing refrigerant;

[0010] An outer side wall of the compressor body away from the accumulator is provided with at least one step, and the step is located between the upper cylinder head and the lower cylinder head, so that the diameter of the shell at the upper cylinder head is larger than the diameter of the shell at the lower cylinder head.

[0011] According to an example of the present invention, the cylinder assembly includes a cylinder;

[0012] The step is arranged on a side of the upper cylinder cover away from the liquid reservoir.

[0013] According to an example of the present invention, the housing includes an upper housing and a lower housing, and the upper housing and the lower housing are respectively connected to the step of the upper cylinder head.

[0014] According to an example of the present invention, the compressor body and the liquid reservoir are connected via an air suction hole;

[0015] The air intake hole is connected to the cylinder or the upper cylinder cover.

[0016] According to an example of the present invention, the cylinder assembly includes an upper cylinder and a lower cylinder, and an intermediate plate is provided between the upper cylinder and the lower cylinder;

[0017] A step is arranged at the middle plate.

[0018] According to an example of the present invention, the shell includes an upper shell and a lower shell, and the upper shell and the lower shell are respectively connected to the steps of the middle plate.

[0019] According to an example of the present invention, the compressor body and the liquid reservoir are connected through two suction holes;

[0020] The two air suction holes are connected to the upper cylinder and the lower cylinder respectively.

[0021] According to an example of the present invention, the compressor body and the liquid reservoir are connected via an air suction hole;

[0022] The air suction hole is connected to the middle plate.

[0023] According to an example of the present invention, the rotary compressor further includes a mounting foot disposed at the bottom of the shell.

[0024] According to an example of the present invention, the mounting foot is a triangular tray foot.

[0025] The present invention arranges a step on the outer side wall of the rotary compressor body so that the installation support point of the compressor coincides with the center of gravity of the compressor, thereby reducing the uneven force on the compressor installation foot, reducing the vibration and noise of the compressor, and improving the overall stability and efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more obvious. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1-Figure 5 Schematic diagram of the structure of the rotary compressor of each embodiment of the present invention;

[0028] Figure 6 A top view of a mounting foot of a rotary compressor according to an embodiment of the present invention;

[0029] Figure 7 A side view of a mounting foot of a rotary compressor according to an embodiment of the present invention.

[0030] Reference numerals

[0031] 100 Compressor body

[0032] 110 Housing

[0033] 111 Upper shell

[0034] 112 Lower shell

[0035] 120 Motor

[0036] 130 Upper cylinder head

[0037] 140 Lower cylinder head

[0038] 150 Middle plate

[0039] 190 steps

[0040] 700 Mounting feet

[0041] 800 Air intake

[0042] 900 Reservoir DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0044] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0045] Figures 1 to 5 The present invention is a schematic diagram of the structure of a rotary compressor of various embodiments. The present invention is applicable to single-cylinder and double-cylinder compressors. Specifically, the rotary compressor includes:

[0046] A compressor body 100 and a liquid reservoir 900; the compressor body 100 and the liquid reservoir 900 are connected via at least one air intake hole 800;

[0047] The compressor body 100 comprises:

[0048] Housing 110;

[0049] The motor 120, the upper cylinder head 130, the lower cylinder head 140 and the cylinder assembly are accommodated in the housing; the cylinder assembly includes at least one cylinder, and the upper cylinder head 130 and the lower cylinder head 140 are respectively arranged on the upper end surface and the lower end surface of the cylinder assembly to form a compression space for compressing the refrigerant; a crankshaft is also arranged in the housing 110 of the compressor body, and the upper part of the eccentric part of the crankshaft is generally positioned on the central axis of the housing through a support assembly, and the eccentric part of the crankshaft is penetrated by the upper cylinder head 130 and the lower cylinder head 140. A piston is arranged in the compression space formed by the upper cylinder head 130, the lower cylinder head 140 and the cylinder assembly, and the piston is fixed to the eccentric part of the crankshaft and rotates synchronously with the crankshaft to compress the refrigerant.

[0050] An outer wall of the compressor body 100 away from the liquid reservoir 900 is provided with at least one step 190, and the step 190 is located between the upper cylinder head 130 and the lower cylinder head 140, so that the diameter of the shell at the upper cylinder head 130 is larger than the diameter of the shell at the lower cylinder head 140.

[0051] Figures 1 to 3 In the case of a single-cylinder rotary compressor, in such embodiments, the cylinder assembly includes one cylinder.

[0052] Figure 1 In the embodiment, the step 190 is disposed on the outer wall of the compressor body 100 away from the reservoir between the upper cylinder head 130 and the lower cylinder head 140. In this embodiment, the shell 110 is integral and can be obtained by a stretching process.

[0053] In an embodiment of the present invention, the housing 110 may also be separate, that is, the housing 110 may include an upper housing 111 and a lower housing 112, such as 2 and Figure 3 As shown, the upper shell 111 and the lower shell 112 are respectively connected to the upper cylinder cover 130, and the step 190 can be arranged on the side of the upper cylinder cover 130 away from the liquid reservoir 900. The shape of the step is not limited and can be Figure 2 The upper shell 111 and the lower shell 112 can be connected to the upper cylinder head 130 by welding or the like. At this time, the geometric centers of the upper shell 111 and the lower shell 112 do not coincide, and the width of the step on the upper cylinder head 130 is the difference between the diameter of the upper shell 111 and the diameter of the lower shell.

[0054] The liquid accumulator of the single-cylinder rotary compressor is single-suction, and the liquid accumulator can be connected to the suction hole of the compressor through a single elbow. Figure 2 In the embodiment, the air intake hole 800 is connected to the cylinder.

[0055] When the compressor shell is integrated, the upper cylinder head is often welded to the inner wall of the shell, so the air intake hole is generally not provided on the cylinder head. In the present invention, since the shell 110 can also be separate, part of the upper cylinder head can be exposed to the upper shell 111 and the lower shell 112, and the air intake hole 800 can be provided at the exposed upper cylinder head. Figure 3 The air intake hole is arranged on the upper cylinder cover to avoid the problem of shell deformation when welding to the cylinder.

[0056] The rotary compressor also includes a mounting foot disposed at the bottom of the shell. In the embodiment where the shell 110 includes an upper shell 111 and a lower shell 112, the mounting foot is actually disposed on the lower shell 112. Therefore, the diameter of the shell at the lower cylinder head 140 is smaller than the diameter of the shell at the upper cylinder head 130, so that the mounting support point of the rotary compressor is closer to the liquid reservoir than that of the existing compressor. By optimizing the size and position of the step 190, that is, optimizing the difference between the diameter of the shell at the upper cylinder head 130 and the diameter of the shell at the lower cylinder head 140, in the embodiment of the present invention, the mounting support point of the rotary compressor can be made to coincide with the center of gravity of the compressor. When the mounting foot of the embodiment adopts a triangular tray foot, see respectively Figure 6 and Figure 7 The top view and side view of the installation base of this embodiment show that the triangular tray base is evenly stressed. The even force on the installation base can effectively prevent the compressor from tilting, reduce the vibration of the compressor, reduce noise, and reduce breakage and leakage of the air-conditioning piping, thereby improving the overall stability and life of the compressor.

[0057] Figure 4 and Figure 5For a double-cylinder rotary compressor, in such embodiments, the cylinder assembly includes an upper cylinder and a lower cylinder, and an intermediate plate 150 is provided between the upper cylinder and the lower cylinder. Similarly, in these embodiments, the housing 110 can be integrated or separate.

[0058] When the housing 110 is a separate type including an upper housing 111 and a lower housing 112 , the upper housing 111 and the lower housing 112 may be respectively connected to the middle plate 150 , and the step 190 may be disposed on a side of the middle plate 1500 away from the liquid reservoir 900 .

[0059] The liquid accumulator 900 can be a single-bend pipe or a double-bend pipe. When the rotary compressor is in single suction mode, the suction hole 800 can be arranged on the middle plate 150 and connected to the single-bend pipe of the liquid accumulator; when the rotary compressor is in double suction mode, two suction holes 800 can be arranged on the upper cylinder and the lower cylinder respectively, and connected to the double-bend pipe of the liquid accumulator to realize the connection between the compressor body 100 and the liquid accumulator 900.

[0060] The installation foot of the rotary compressor is not limited to being set at the bottom of the housing (integrated type) or the lower housing (separate type). Figure 1 , Figure 3 and Figure 5 ), it is also a feasible solution to set the mounting feet on the two sides of the lower part of the shell (integrated type) or the lower shell (separate type), such as Figure 2 and Figure 4 shown.

[0061] In summary, the present invention provides a rotary compressor, comprising: a compressor body and a liquid reservoir; the compressor body and the liquid reservoir are connected through at least one suction hole; the compressor body comprises: a shell; a motor and an upper cylinder head, a lower cylinder head and a cylinder assembly, which are accommodated in the shell; the cylinder assembly comprises at least one cylinder, and the upper cylinder head and the lower cylinder head are respectively arranged on the upper end surface and the lower end surface of the cylinder assembly to form a compression space for compressing refrigerant; an outer side wall of the compressor body away from the liquid reservoir is provided with at least one step, and the step is located between the upper cylinder head and the lower cylinder head, so that the diameter of the shell at the upper cylinder head is larger than the diameter of the shell at the lower cylinder head.

[0062] The present invention arranges a step on the outer side wall of the rotary compressor body so that the installation support point of the compressor coincides with the overall center of gravity of the compressor, thereby reducing the uneven force on the compressor installation foot, reducing the vibration and noise of the compressor, and improving the overall stability and efficiency of the compressor.

[0063] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by one unit or device through software or hardware. It should be understood that the terms "below" or "above", "downward" or "upward" are used to describe the features of the exemplary embodiments with reference to the positions shown in the figures; the words first, second, etc. are used to indicate the names, and do not indicate any particular order.

Claims

1. A rotary compressor, characterized in that: include: Compressor body and liquid receiver; The compressor body and the liquid reservoir are connected via at least one suction hole; The compressor body comprises: case; The motor, the upper cylinder cover, the lower cylinder cover and the cylinder assembly are accommodated in the housing; the cylinder assembly includes at least one cylinder, and the upper cylinder cover and the lower cylinder cover are respectively arranged on the upper end surface and the lower end surface of the cylinder assembly to form a compression space for compressing refrigerant; An outer side wall of the compressor body away from the liquid accumulator is provided with at least one step so that the mounting support point of the rotary compressor coincides with the center of gravity of the compressor; The step is located between the upper cylinder head and the lower cylinder head so that a diameter of the housing at the upper cylinder head is greater than a diameter of the housing at the lower cylinder head.

2. The rotary compressor according to claim 1, characterized in that: The cylinder assembly includes a cylinder; The step is arranged on a side of the upper cylinder cover away from the liquid reservoir.

3. The rotary compressor according to claim 2, characterized in that: The housing includes an upper housing and a lower housing, and the upper housing and the lower housing are respectively connected to the steps of the upper cylinder cover.

4. The rotary compressor according to claim 2, characterized in that: The compressor body and the liquid reservoir are connected via an air suction hole; The air intake hole is connected to the cylinder or the upper cylinder cover.

5. The rotary compressor according to claim 1, characterized in that: The cylinder assembly comprises an upper cylinder and a lower cylinder, and an intermediate plate is arranged between the upper cylinder and the lower cylinder; The step is arranged at the middle plate.

6. The rotary compressor according to claim 5, characterized in that: The housing includes an upper housing and a lower housing, and the upper housing and the lower housing are respectively connected to the steps of the middle plate.

7. The rotary compressor according to claim 5, characterized in that: The compressor body and the liquid reservoir are connected via two air suction holes; The two air suction holes are connected to the upper cylinder and the lower cylinder respectively.

8. The rotary compressor according to claim 5, characterized in that: The compressor body and the liquid reservoir are connected via an air suction hole; The air suction hole is connected to the middle plate.

9. The rotary compressor according to claim 1, characterized in that: Also included is a mounting foot arranged at the bottom of the shell.

10. The rotary compressor according to claim 9, characterized in that: The installation foot is a triangular tray foot.

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