Compressor pump body assembly and rotary compressor

Abstract

The utility model provides a compressor pump body assembly and a rotary compressor. The pump body assembly comprises a pump body and at least one air supply channel arranged on the pump body, the pump body comprises at least one compression cavity; the first end of the at least one air supply channel can extend out of the shell of the compressor; the second end of the at least one air supply channel is communicated with the at least one compression cavity; the end opening of the second end is lower than the end face where the second end is located, a groove is formed in the side wall of the end opening of the second end, and the groove comprises a first part which is in a gradually-shrunk curve shape on the end face where the second end is located. The groove is formed in the port, connected with the compression cavity, of the air supply channel, and the groove at least comprises the first part with the sectional area gradually reduced, so that a refrigerant in the air supply channel is guided to flow to the compression cavity more smoothly, and turbulent flow is reduced; meanwhile, the impact of fluid on the wall surface is reduced, the pressure loss in the refrigerant flowing process can be reduced, the refrigerant conveying efficiency is improved, and therefore the energy efficiency of the compressor is improved.

Description

Technical Field

[0001] The utility model relates to the field of compressors, in particular to a compressor pump body component and a rotary compressor. Background Art

[0002] In the prior art, in order to ensure that the compressor can still maintain high energy efficiency and performance in a low temperature environment, an intermediate air supply form is usually adopted. There are two mainstream intermediate air supply structures currently used: a structure that uses the piston motion trajectory to control the opening and closing of the intermediate air supply path; and a structure that uses a one-way valve structure to control the opening and closing of the intermediate air supply path. The above two structures have the following defects:

[0003] In the technical solution of using the piston motion trajectory to control the opening and closing of the intermediate air supply flow passage, under non-air supply conditions or high pressure ratios, the high-pressure refrigerant in the cylinder compression chamber will flow back to the air supply passage, causing a decrease in energy efficiency and performance;

[0004] In the technical solution of using a one-way valve to control the opening and closing of the intermediate air supply path, due to the presence of the one-way valve, the intermediate air supply path is divided into two sections, namely the air supply path connected to the intermediate pressure refrigerant supply side and the air inlet path connected to the compression chamber. The air supply refrigerant enters the air inlet through the one-way valve and then flows into the cylinder compression chamber. During this process, the flow path area changes dramatically and the refrigerant pressure loss is large, resulting in a decrease in the refrigerant flow rate entering the compression chamber and a decrease in the performance of the compressor. At the same time, the clearance volume formed by the air inlet flow path has an adverse effect on the overall energy efficiency of the compressor.

[0005] It should be noted that the information of the utility model in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to those skilled in the art. Utility Model Content

[0006] In response to the problems in the prior art, the purpose of the utility model is to provide a compressor pump body assembly and a rotary compressor, in which the port connecting the air supply channel of the pump body assembly and the compression chamber is provided with a groove, so that the refrigerant in the air supply channel can flow more smoothly to the compression chamber, reduce the generation of turbulence and reduce the pressure loss during the flow of the refrigerant, thereby improving the energy efficiency of the compressor.

[0007] A first aspect of the utility model provides a compressor pump assembly, comprising a pump body and at least one air supplement channel arranged in the pump body;

[0008] The pump body includes at least one compression chamber;

[0009] The first end of the at least one air supplement channel may extend out of the housing of the compressor;

[0010] The second end of the at least one air supplement channel is in communication with the at least one compression chamber;

[0011] The port of the second end is lower than the end surface where the second end is located, and a groove is arranged on the side wall at the port of the second end. The groove includes a first portion in a tapered curve shape at the end surface where the second end is located.

[0012] According to the first aspect of the utility model, the bottom surface of the groove is parallel to the end surface where the second end is located;

[0013] An included angle between a wall surface of the first portion on a side away from the port of the second end and a bottom surface of the groove is between 90° and 160°.

[0014] According to a first aspect of the utility model, the groove further comprises a second portion connected to the first portion in a tapered curve shape, and the end surface of the second portion at the second end thereof is in a tapered curve shape.

[0015] According to the first aspect of the utility model, the bottom surface of the groove is parallel to the end surface where the second end is located;

[0016] An included angle between a wall surface of the second portion on a side facing away from the first portion and a bottom surface of the groove is between 90° and 160°.

[0017] According to the first aspect of the utility model, a control valve structure is provided on the end surface of the air supplement channel where the second end is located;

[0018] The control valve structure is configured to control the flow or interruption of the refrigerant in the supplementary air passage.

[0019] According to the first aspect of the utility model, the control valve structure includes an elastic valve plate and a valve plate baffle;

[0020] The elastic valve sheet can cover or open the port at the second end.

[0021] According to the first aspect of the utility model, the air supplement channel is arranged along the radial direction of the compressor, and the groove is arranged on the extension line of the air supplement channel toward the compression chamber.

[0022] A second aspect of the utility model provides a rotary compressor, comprising the compressor pump body assembly.

[0023] According to a second aspect of the utility model, the compressor pump assembly includes two air supply channels;

[0024] The pump body comprises an upper bearing, a first cylinder, an intermediate plate, a second cylinder and a lower bearing;

[0025] The upper bearing, the first cylinder and the middle plate together form a first compression chamber;

[0026] The middle plate, the second cylinder and the lower bearing together form a second compression chamber;

[0027] The two air supply channels are arranged on the middle plate;

[0028] The first ends of the two air supplement channels may extend out of the compressor housing;

[0029] The second ends of the two air supplement channels are respectively communicated with the first compression chamber and the second compression chamber.

[0030] The port connecting the air supply channel and the compression chamber of the utility model is provided with a groove, and the groove includes at least a first part with a gradually decreasing cross-sectional area, thereby guiding the refrigerant in the air supply channel to flow more smoothly to the compression chamber and reduce the generation of turbulence; at the same time, it can reduce the friction between the refrigerant fluid and the pipeline, reduce the impact of the fluid on the wall, reduce the pressure loss during the flow of the refrigerant, improve the refrigerant transportation efficiency, and thus improve the energy efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0032] Figure 1 It is a structural schematic diagram of the end surface where the port of the second end of the air supplement channel of one embodiment of the utility model is located;

[0033] Figure 2 A schematic diagram of the structure of a compressor pump assembly according to an embodiment of the utility model;

[0034] Figure 3 A schematic diagram of the structure of the groove of the first embodiment of the utility model; and

[0035] Figure 4 It is a schematic structural diagram of a groove according to a second embodiment of the utility model. DETAILED DESCRIPTION

[0036] 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 embodiments set forth herein. On the contrary, these embodiments are provided so that the utility model will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and should not be construed as limitations on the utility model. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0037] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the description of the present utility model, 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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] The utility model below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the utility model of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0040] The utility model provides a compressor pump body assembly and a rotary compressor, wherein the pump body assembly includes a pump body and at least one air supply channel arranged on the pump body; the pump body includes at least one compression chamber; the first end of the at least one air supply channel can extend out of the compressor shell; the second end of the at least one air supply channel is connected to the at least one compression chamber; the port of the second end is lower than the end face where the second end is located, and a groove is arranged on the side wall at the port of the second end, and the groove includes a first part that is in a tapered curve shape on the end face where the second end is located.

[0041] The port connecting the air supply channel and the compression chamber of the utility model is provided with a groove, and the groove includes at least a first part with a gradually decreasing cross-sectional area, thereby guiding the refrigerant in the air supply channel to flow more smoothly to the compression chamber and reduce the generation of turbulence; at the same time, it can reduce the friction between the refrigerant fluid and the pipeline, reduce the impact of the fluid on the wall, reduce the pressure loss during the flow of the refrigerant, improve the refrigerant transportation efficiency, and thus improve the energy efficiency of the compressor.

[0042] The structure of the compressor pump assembly and the rotary compressor of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It can be understood that the various specific embodiments are not intended to limit the protection scope of the present invention.

[0043] The utility model provides a compressor pump body assembly, including a pump body and at least one air supply channel arranged on the pump body; the pump body includes at least one compression chamber; the first end of the at least one air supply channel can extend out of the shell of the compressor; the second end of the at least one air supply channel is connected to the at least one compression chamber. For example, the compressor is a single-cylinder compressor, in which case the pump body includes an upper bearing, a cylinder and a lower bearing, the pump body assembly includes a compression chamber and an air supply channel, the air supply channel can be arranged on the upper bearing, the cylinder or the lower bearing, one end of the air supply channel can extend out of the shell of the compressor and be connected to the air supply device, and the other end is connected to the compression chamber; the compressor is a double-cylinder compressor, in which case the pump body includes an upper bearing, an upper cylinder, an intermediate plate, a lower cylinder and a lower bearing, the pump body assembly includes two compression chambers and two air supply channels; the two air supply channels can be arranged on the intermediate plate, or the upper bearing / upper cylinder and the lower cylinder / lower bearing respectively, and the two air supply channels can be connected to the two compression chambers respectively. Of course, the pump body also includes components such as a piston and blades, which will not be described in detail here because they do not affect the setting of the air supply channel.

[0044] Furthermore, Figure 1 This is a schematic structural diagram of the end surface where the port of the second end of the air supplement channel of one embodiment of the utility model is located. The end surface may be the end surface of the upper bearing, the lower cylinder or the middle plate facing the compression chamber. Figure 2 The structure of the compressor pump assembly of an embodiment of the utility model is schematically shown, wherein the compressor is a double-bar compressor, the pump assembly at least includes an intermediate plate and an upper cylinder 2 and a lower cylinder 3 on both sides, and an air supply channel 11 is arranged on the intermediate plate 1. In this embodiment, the air supply channel 11 is arranged along the radial direction of the compressor, and the port of the first end 111 of the air supply channel 11 is arranged on the side of the intermediate plate 1 so that it can be connected to an external air supply device. In this embodiment, the air supply channel 11 includes two second ends 112. At this time, the air supply channel 11 can be Y-shaped, see Figure 2 As shown in the dashed arrow, the two second ends 112 are respectively arranged at the two end surfaces of the middle plate 1, the port of the second end 112 is lower than the end surface where the second end 112 is located (the end surface of the middle plate 1), and a groove A is arranged on the side wall at the port of the second end 112. In this embodiment, the groove A can be arranged on the extension line of the air supplement channel 11 toward the compression chamber.

[0045] Figure 3The schematic diagram of the structure of the groove of the first embodiment of the utility model, the groove A includes a first part with a tapered curve shape at the end face where the second end is located, and the groove A is the air inlet of the refrigerant of the air supply channel 11 to the compression chamber. Specifically, the groove A can be divided into the front end A1 of the air inlet, the rear end A2 of the air inlet and the tail end A3 of the air inlet, and the width of the front end A1 of the air inlet and the rear end A2 of the air inlet gradually decreases. Preferably, the bottom surface of the groove A is parallel to the end face where the second end is located; the wall surface of the first part on the side away from the port of the second end, that is, the wall surface of the tail end A3 of the air inlet and the bottom surface of the groove A are between 90° and 160°. For the embodiment in which the wall surface of the tail end A3 of the air inlet is perpendicular to the bottom surface of the groove A, the angle between the wall surface of the tail end A3 of the air inlet and the bottom surface of the groove A can further reduce the pressure loss of the refrigerant in the flow path, thereby improving the refrigerant delivery efficiency. The groove structure of the first embodiment is simple, the processability is strong, and the influence of the clearance volume of the compressor is reduced.

[0046] Figure 4 This is a schematic diagram of the structure of the groove of the second embodiment of the utility model. Different from the first embodiment, the groove A' also includes a second part connected to the first part of the tapered curve shape, and the second part is in the shape of a gradually expanding curve at the end face where the second end is located. Similarly, the groove A' is the air inlet for the refrigerant of the air supply channel 11 to flow to the compression chamber. The groove A' can be divided into the front end A1' of the air inlet (tapered curve shape), the rear end A2' of the air inlet (gradually expanding curve shape) and the tail end A3' of the air inlet. The width of the front end A1' of the air inlet gradually decreases, and the width of the rear end A2' of the air inlet gradually decreases, that is, the groove A' is in the shape of a hyperbola. At this time, the cross-sectional area of ​​the refrigerant flow path (from the air supply channel to the compression chamber) first decreases and then increases, and the minimum cross-sectional area is in the middle of the flow path (OO dotted line). The hyperbolic groove A' can guide the refrigerant to flow more smoothly and reduce the generation of turbulence. Furthermore, the bottom surface of the groove A' is parallel to the end surface where the second end is located; the angle between the wall surface of the second part on the side away from the first part and the bottom surface of the groove is between 90° and 160°. At this time, the friction between the refrigerant fluid and the flow path can be reduced, the impact of the fluid on the wall surface can be reduced, the pressure loss during the flow of the refrigerant can be reduced, and the refrigerant delivery efficiency can be improved. In addition, the volume of the hyperbolic air inlet is smaller than that of the circular channel, and the compressor clearance volume of the air supply channel using the second embodiment is smaller, which is more beneficial to the energy efficiency improvement of the compressor.

[0047] Figure 2In the embodiment, the end surface of the air supply channel 11 where the second end 112 is located is provided with a control valve structure 12, and the control valve structure is configured to control the circulation or interruption of the refrigerant in the air supply channel. More specifically, the control valve structure 12 may include an elastic valve plate 121 and a valve plate baffle 122; the elastic valve plate 121 may cover or open the port of the second end 112. When the refrigerant pressure in the air supply channel is greater than the pressure of the compression chamber connected thereto, the elastic valve plate 121 opens, and the refrigerant enters the compression chamber of the cylinder through the air supply channel 11 and the groove in turn; when the refrigerant pressure in the air supply channel is less than the pressure of the compression chamber connected thereto, the elastic valve plate 121 covers the port of the second end 112 of the air supply channel 11, and the air supply is interrupted.

[0048] The utility model also provides a rotary compressor, including the compressor pump body assembly. For example, the compressor pump body assembly includes two air supply channels; the pump body includes an upper bearing, a first cylinder, an intermediate plate, a second cylinder and a lower bearing; the upper bearing, the first cylinder and the intermediate plate together form a first compression chamber; the intermediate plate, the second cylinder and the lower bearing together form a second compression chamber; the two air supply channels are arranged on the intermediate plate; the first ends of the two air supply channels can extend out of the compressor housing; the second ends of the two air supply channels are respectively connected to the first compression chamber and the second compression chamber. Of course, the pump body assembly of a single-cylinder rotary compressor can be provided with only one air supply channel. The rotary compressor provided with the air supply channel of the utility model has higher energy efficiency due to the higher refrigerant transportation efficiency during air supply.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0050] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A compressor pump assembly, characterized in that: It comprises a pump body and at least one air supplement channel arranged on the pump body; The pump body includes at least one compression chamber; The first end of the at least one air supplement channel may extend out of the housing of the compressor; The second end of the at least one air supplement channel is in communication with the at least one compression chamber; The port of the second end is lower than the end surface where the second end is located, and a groove is arranged on the side wall at the port of the second end. The groove includes a first portion in a tapered curve shape at the end surface where the second end is located.

2. The compressor pump assembly according to claim 1, characterized in that: The bottom surface of the groove is parallel to the end surface where the second end is located; An included angle between a wall surface of the first portion on a side away from the port of the second end and a bottom surface of the groove is between 90° and 160°.

3. The compressor pump assembly according to claim 1, characterized in that: The groove further includes a second portion connected to the first portion in a tapered curve shape, and the second portion is in a tapered curve shape at an end surface where the second end is located.

4. The compressor pump assembly according to claim 3, characterized in that: The bottom surface of the groove is parallel to the end surface where the second end is located; An included angle between a wall surface of the second portion on a side facing away from the first portion and a bottom surface of the groove is between 90° and 160°.

5. The compressor pump assembly according to claim 1, characterized in that: The end surface of the second end of the air supply channel is provided with a control valve structure. The control valve structure is configured to control the flow or interruption of the refrigerant in the supplementary air passage.

6. The compressor pump assembly according to claim 5, characterized in that: The control valve structure includes an elastic valve plate and a valve plate baffle; The elastic valve sheet can cover or open the port at the second end.

7. The compressor pump assembly according to claim 1, characterized in that: The air supplement channel is arranged along the radial direction of the compressor, and the groove is arranged on the extension line of the air supplement channel toward the compression chamber.

8. A rotary compressor, characterized in that: A compressor pump body assembly comprising any one of claims 1 to 7.

9. The rotary compressor according to claim 8, characterized in that: The compressor pump body assembly includes two air supply channels; The pump body comprises an upper bearing, a first cylinder, an intermediate plate, a second cylinder and a lower bearing; The upper bearing, the first cylinder and the middle plate together form a first compression chamber; The middle plate, the second cylinder and the lower bearing together form a second compression chamber; The two air supply channels are arranged on the middle plate; The first ends of the two air supplement channels may extend out of the compressor housing; The second ends of the two air supplement channels are respectively communicated with the first compression chamber and the second compression chamber.

Images