Air-supplementing scroll compressor with separating ring

Abstract

The utility model discloses an air supply scroll compressor with a separation ring, and relates to the technical field of compressors, in particular to the air supply scroll compressor with the separation ring. The device comprises a shell, wherein a floating mechanism is in interference fit with the middle upper part in the shell; a fixed vortex is assembled on the floating mechanism; vortex blades of the fixed vortex and the movable vortex are matched with each other to form a compression cavity; a stepped annular channel is processed on the upper surface of the fixed vortex; a high-low pressure isolation assembly is arranged above the fixed vortex and is used for sealing the annular channel; a separation ring is arranged in the annular channel; the fixed vortex floats between the movable vortex and the high-low pressure isolation assembly through the floating mechanism. According to the technical scheme, the problems that in the prior art, when the external temperature is too low, the air suction specific volume and the compression ratio of the compressor are increased, so that the exhaust temperature rises rapidly, the performance of the compressor is reduced, the heating capacity is insufficient, and mechanical parts are abraded and even damaged inevitably after long-term operation are solved.

Description

Technical Field

[0001] The utility model discloses an air-supplementing scroll compressor with a separation ring, relates to the technical field of compressors, and in particular to an air-supplementing scroll compressor with a separation ring. Background Art

[0002] When ordinary compressors are heating in low temperature environments, the heating capacity of the air conditioning system drops rapidly as the outdoor ambient temperature drops, while the heat demand rises rapidly as the outdoor ambient temperature drops. When the outdoor temperature is very low, the heating capacity of the air conditioning system will be too small to meet the heating needs of cold areas. At the same time, as the outdoor environment decreases, the evaporation temperature will drop below zero degrees Celsius, and the compressor will increase the suction specific volume and compression ratio, resulting in a rapid increase in exhaust temperature. Long-term operation will inevitably cause the compressor performance to decline significantly and the heating capacity to be insufficient, and the mechanical parts will wear out or even be damaged. To address this problem, the fixed scroll axial floating structure is used, which can effectively buffer the liquid hammer and is not prone to damage. However, the current air replenishment structure will affect the floating posture of the fixed scroll, resulting in leakage between the teeth and reduced performance.

[0003] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of air-supplementing scroll compressor with a separation ring to overcome the problems existing in the prior art. Summary of the invention

[0004] According to the above-mentioned prior art, when the outside temperature is too low, the compressor will have an increase in suction specific volume and compression ratio, resulting in a rapid increase in exhaust temperature. Long-term operation will inevitably cause technical problems such as a significant decrease in compressor performance and insufficient heating capacity, increased wear and even damage of mechanical parts, and thus provide an air-supplementing scroll compressor with a separator ring.

[0005] The technical means adopted by the utility model are as follows:

[0006] An air-supplementing scroll compressor with a separation ring comprises a housing, wherein a floating mechanism is interference-fitted in the middle and upper part of the housing; a fixed scroll is mounted on the floating mechanism; scroll blades of the fixed scroll and the movable scroll cooperate with each other to form a compression chamber;

[0007] Furthermore, the upper surface of the fixed scroll is processed with a stepped annular channel;

[0008] Furthermore, a high-low pressure isolation assembly is provided above the fixed scroll to seal the annular channel;

[0009] Further, a separation ring is provided in the annular channel;

[0010] Furthermore, the fixed scroll floats between the movable scroll and the high and low pressure isolation assembly through a floating mechanism.

[0011] Further, the high and low voltage isolation assembly comprises: a high and low voltage isolation plate, a first sealing ring, a second sealing ring and an annular fixing ring;

[0012] Furthermore, the high-low pressure isolation plate is arranged above the fixed scroll, and a limit groove for limiting the axial movement of the fixed scroll is arranged on its lower end surface;

[0013] Furthermore, the top end of the annular fixing ring is fixedly connected to the lower surface of the high and low pressure isolation plate, and the lower end extends into the interior of the annular channel;

[0014] Further, there is a gap between the bottom of the annular channel and the lower surface of the annular fixing ring;

[0015] Furthermore, the first sealing ring is installed between the high and low pressure isolation plate and the annular fixed ring, and its outer edge is located between the inner end surface of the high and low pressure isolation plate and the inner ring wall of the annular channel;

[0016] Furthermore, the second sealing ring is installed between the high and low pressure isolation plates and the annular fixed ring, and its outer edge is located between the outer section of the annular fixed ring and the outer ring wall of the annular channel.

[0017] Furthermore, tiny protrusions are processed on the inner edge and the outer edge of the upper end surface of the annular fixing ring, which are used to squeeze the first sealing ring and the second sealing ring respectively, so as to achieve a better sealing effect.

[0018] Furthermore, a separation ring is arranged at the lower inner part of the annular channel, and a sealing ring is arranged between the inner and outer side walls of the separation ring and the inner and outer side walls of the annular channel;

[0019] Furthermore, a medium-pressure chamber is formed between the lower end surface of the separation ring and the bottom of the annular channel;

[0020] Furthermore, an air supplementation cavity is formed between the upper end surface of the separation ring and the bottom end surface of the annular fixing ring;

[0021] Furthermore, the separation ring can float up and down in the annular channel;

[0022] Furthermore, an annular boss is provided on the upper surface of the separation ring for axially limiting the separation ring.

[0023] Furthermore, a medium-pressure hole connected to the compression chamber is provided on the fixed scroll at the bottom of the medium-pressure chamber, and the gas in the compression chamber enters the medium-pressure chamber through the medium-pressure hole. Under the action of the gas pressure, the fixed scroll and the movable scroll are axially sealed;

[0024] Furthermore, an air supplement channel is provided above the air supplement cavity;

[0025] Further, the air supplement channel is an internal channel of the air supplement pipe;

[0026] Furthermore, the air supply pipe is interference-fitted on the through hole of the annular fixing ring;

[0027] Furthermore, the bottom end of the air supply pipe is connected to the air supply cavity, and the upper end passes through the annular fixing ring, the high and low pressure isolation plate and the shell and is then placed outside the compressor;

[0028] Furthermore, the air-infusing cavity radially covers an air-infusing hole communicated with the compression cavity; the air-infusing hole connects the air-infusing cavity and the compression cavity.

[0029] Furthermore, the annular fixing ring is assembled on the lower end surface of the high and low pressure isolation plate by riveting, which is convenient for fixing and installing the air supply pipe.

[0030] Furthermore, the annular fixing ring plays a sealing role on the air supply channel;

[0031] Furthermore, the annular fixing ring plays a fixing role on the first sealing ring and the second sealing ring;

[0032] Furthermore, the annular fixing ring has a height limiting effect on the axial floating of the separation ring.

[0033] Further, the floating mechanism includes: a support member and a pin;

[0034] Further, a support member is provided at the lower part of the movable scroll for supporting the movable scroll;

[0035] Furthermore, the pin is fixedly mounted near the outer edge of the support member;

[0036] Furthermore, the pin shaft is movably matched with the pin hole processed on the fixed scroll to limit the circumferential and radial movement of the fixed scroll, but does not limit the axial movement of the fixed scroll;

[0037] Furthermore, the pin shaft is assembled with the support member by interference fit, and the number is set to 2.

[0038] The working process of this utility model is:

[0039] When the present invention is working, the refrigerant enters the compressor through the air supply pipe and enters the compression chamber through the air supply hole to form a refrigerant air supply function;

[0040] At the same time, the pressure of the middle compression chamber of the compressor enters the intermediate pressure chamber through the intermediate pressure hole, causing the fixed scroll to press down and ensure axial sealing.

[0041] The air supplement chamber and the medium pressure chamber are separated by a separation ring. The pressures of the two chambers do not interfere with each other and do not affect the floating posture of the fixed scroll 2, ensuring stable performance.

[0042] Compared with the prior art, the utility model has the following advantages:

[0043] 1. The air-infusing scroll compressor with a separation ring provided by the utility model has an air-infusing cavity and an air-infusing hole in the fixed scroll. Due to the air-infusing effect, the mass of the refrigerant in the compression chamber is continuously increased, and the cooling effect of the refrigerant significantly reduces the exhaust temperature of the compressor, so that the compressor can work normally; the injected refrigerant increases the heating amount and improves the capacity of the compressor. At the same time, since the increase in heating amount is higher than the increase in power, the efficiency of the compressor is significantly improved;

[0044] 2. The air-supplementing scroll compressor with a separation ring provided by the utility model has an annular channel in the fixed scroll, and a separation ring is placed in the annular channel to separate the air-supplementing chamber from the medium-pressure chamber. The medium-pressure chamber is located below the annular channel and is connected to the compression chamber through the medium-pressure hole. When the fixed scroll establishes an intermediate pressure, the leakage of the tooth top can be effectively reduced. At the same time, the air-supplementing chamber above the annular channel does not affect the floating posture of the fixed scroll while replenishing air, and will not cause leakage and affect performance.

[0045] 3. The air-supplementing scroll compressor with a separator ring provided by the utility model adopts an annular fixing ring to fix the first sealing ring and the second sealing ring on the high-low pressure isolation plate, thereby forming an annular channel in cooperation with the fixed scroll. Since the high-low pressure partition assembly is fixed, the installation of the air-supplementing pipe is convenient and the installation process is simplified.

[0046] In summary, the technical solution of the utility model solves the problem in the prior art that when the external temperature is too low, the suction specific volume and compression ratio of the compressor will increase, resulting in a rapid increase in exhaust temperature. Long-term operation will inevitably cause the compressor performance to decline and the heating capacity to be insufficient, and the mechanical parts will be aggravated by wear and even damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 It is a schematic diagram of the structure of the utility model;

[0049] Figure 2 This is an enlarged view of the assembly structure of the separator ring of the utility model;

[0050] Figure 3 This is the coordination diagram of the fixed scroll and the movable scroll of the utility model;

[0051] Figure 4 It is a schematic diagram of the fixed scroll stepped annular groove of the utility model.

[0052] In the figure: 1, movable scroll 2, fixed scroll 21, annular channel 3, compression chamber 4, high and low pressure isolation assembly 41, high and low pressure isolation plate 42, first sealing ring 43, second sealing ring 44, annular fixing ring 5, shell 6, support 61, pin 7, separating ring 71, medium pressure chamber 72, medium pressure hole 8, air supply pipe 81, air supply channel 82, air supply chamber 83, air supply hole. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0060] like Figure 1-4 As shown, the utility model provides an air-supplementing scroll compressor with a separation ring, comprising: a scroll compression assembly, a high-low pressure isolation assembly 4 and a separation ring 7, the scroll compression assembly comprising a movable scroll 1 and a fixed scroll 2 arranged above the movable scroll 1 and matched with the movable scroll 1, the vortex blades of the movable scroll 1 and the fixed scroll 2 cooperate with each other to form a compression chamber 3; the high-low pressure isolation assembly 4 is located above the fixed scroll 2, the upper surface of the fixed scroll 2 is processed with an annular channel 21, and the high-low pressure isolation assembly 4 seals the annular channel 21. The separation ring 7 is located in the annular channel 21, and a sealing ring is arranged on it, which divides the annular channel 21 into a medium pressure chamber 71 and an air-supplementing chamber 82.

[0061] A medium-pressure hole 72 communicating with the compression chamber 3 is formed at the bottom of the medium-pressure chamber 71. The gas in the compression chamber 3 enters the medium-pressure chamber 71 through the medium-pressure hole 72. Under the action of the gas pressure, the fixed scroll 2 and the movable scroll 1 are axially sealed.

[0062] The fixed scroll 2 floats between the movable scroll 1 and the high-low pressure isolation assembly 4 through a floating mechanism, and the floating distance is less than the height of the vortex blades of the movable scroll 1 or the fixed scroll 2. The floating mechanism includes a support member 6 located below the movable scroll 1 for supporting the movable scroll 1, and a pin shaft 61 is fixed to the outer edge of the support member 6, and a pin hole that movably cooperates with the pin shaft 61 is processed on the fixed scroll 2.

[0063] An air replenishment channel 81 is provided above the air replenishment chamber 82, and the air replenishment channel 81 passes through the high and low pressure isolation assembly 4 and communicates with the air replenishment chamber 82. At the same time, the diameter of the air replenishment chamber 82 covers the air replenishment hole 83 connected to the compression chamber 3, and the air replenishment hole 83 connects the air replenishment chamber 82 and the compression chamber 3.

[0064] The diameter of the air supplement hole 83 is smaller than or equal to the thickness of the vortex blade of the movable scroll 1. The thickness of the vortex blades of the movable scroll 1 and the fixed scroll 2 are equal.

[0065] The high and low pressure isolation assembly 4 comprises: a high and low pressure isolation plate 41, a first sealing ring 42, a second sealing ring 43 and an annular fixing ring 44;

[0066] The high-low pressure isolation plate 41 is arranged above the fixed scroll 2, and the annular fixing ring 44 is fixed on the lower surface of the high-low pressure isolation plate 41 (fixed by riveting or fasteners), and extends into the annular channel 21. There is a gap between the bottom of the annular channel 21 and the lower surface of the annular fixing ring 44; the first sealing ring 42 seals the contact between the inner edge of the annular fixing ring 44 and the inner edge of the annular channel 21; the second sealing ring 43 seals the contact between the outer edge of the annular fixing ring 44 and the outer edge of the annular channel 21.

[0067] The inner edge and the outer edge of the annular fixing ring 44 are processed with tiny protrusions, and the tiny protrusions are used to squeeze the first sealing ring 42 and the second sealing ring 43 to achieve a better sealing effect.

[0068] The high and low pressure isolation plate 41 is processed with a through hole at the corresponding position of the annular fixing ring 44, corresponding to the through hole of the annular fixing ring 44, the air supply pipe 8 is interference fit with the through hole of the annular fixing ring 44, and the top end of the air supply pipe 8 passes through the shell 5 of the scroll compressor and is connected with the air supply mechanism.

[0069] The annular fixing ring 44 is fixed to the high and low pressure partition plates 41 by riveting, which is convenient for fixing and installing the air supply pipe 8. The annular fixing ring 44 not only seals the air supply channel 82, but also fixes and seals the first sealing ring 42 and the second sealing ring 43. It is also the height limiter for the axial floating of the separating ring 7.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An air-supplementing scroll compressor with a separator ring, comprising a housing (5), a floating mechanism being interference-fitted in the middle and upper part of the housing (5); a fixed scroll (2) being mounted on the floating mechanism; scroll blades of the fixed scroll (2) and the movable scroll (1) cooperating with each other to form a compression chamber (3); characterized in that: The upper surface of the fixed scroll (2) is processed with a stepped annular channel (21); A high-low pressure isolation assembly (4) is provided above the fixed scroll (2) to seal the annular channel (21); A separation ring (7) is arranged in the annular channel (21); The fixed scroll (2) floats between the movable scroll (1) and the high-low pressure isolation assembly (4) via a floating mechanism.

2. The air-supplementing scroll compressor with a separation ring according to claim 1, characterized in that: The high-low pressure isolation assembly (4) comprises: a high-low pressure isolation plate (41), a first sealing ring (42), a second sealing ring (43) and an annular fixing ring (44); The high-low pressure isolation plate (41) is arranged above the fixed scroll (2), and a limit groove for limiting the axial movement of the fixed scroll (2) is provided on its lower end surface; The top end of the annular fixing ring (44) is fixedly connected to the lower surface of the high and low pressure isolation plate (41), and the lower end extends into the interior of the annular channel (21); There is a gap between the bottom of the annular channel (21) and the lower surface of the annular fixing ring (44); The first sealing ring (42) is installed between the high-low pressure isolation plate (41) and the annular fixing ring (44), and its outer edge is located between the inner end surface of the high-low pressure isolation plate (41) and the inner ring wall of the annular channel (21); The second sealing ring (43) is installed between the high and low pressure isolation plate (41) and the annular fixing ring (44), and its outer edge is located between the outer section of the annular fixing ring (44) and the outer ring wall of the annular channel (21).

3. The air-supplementing scroll compressor with a separation ring according to claim 2, characterized in that: The inner edge and the outer edge of the upper end surface of the annular fixing ring (44) are processed with tiny protrusions, which are used to squeeze the first sealing ring (42) and the second sealing ring (43) respectively, so as to achieve a better sealing effect.

4. The air-supplementing scroll compressor with a separation ring according to claim 1, characterized in that: The separation ring (7) is arranged at the lower inner part of the annular channel (21), and a sealing ring is arranged between the inner and outer side walls of the separation ring (7) and the inner and outer side walls of the annular channel (21); A medium-pressure chamber (71) is formed between the lower end surface of the separation ring (7) and the bottom of the annular channel (21); An air replenishing cavity (82) is formed between the upper end surface of the separation ring (7) and the bottom end surface of the annular fixing ring (44); The separation ring (7) can float up and down in the annular channel (21); An annular boss is provided on the upper surface of the separation ring (7) for axially limiting the separation ring (7).

5. The air-supplementing scroll compressor with a separation ring according to claim 4, characterized in that: A medium-pressure hole (72) communicating with the compression chamber (3) is provided on the fixed scroll (2) at the bottom of the medium-pressure chamber (71); gas in the compression chamber (3) enters the medium-pressure chamber (71) through the medium-pressure hole (72); and under the action of the gas pressure, the fixed scroll (2) and the movable scroll (1) are axially sealed.

6. The air-supplementing scroll compressor with a separation ring according to claim 4, characterized in that: An air supplement channel (81) is provided above the air supplement cavity (82); The air supply passage (81) is an internal passage of the air supply pipe (8); The air supply pipe (8) is interference-fitted on the through hole of the annular fixing ring (44); The bottom end of the air supply pipe (8) is connected to the air supply cavity (82), and the upper end passes through the annular fixing ring (44), the high and low pressure isolation plate (41) and the shell (5) and is then placed outside the compressor; The air-replenishing cavity (82) radially covers an air-replenishing hole (83) that is in communication with the compression cavity (3); the air-replenishing hole (83) connects the air-replenishing cavity (82) and the compression cavity (3).

7. The air-supplementing scroll compressor with a separation ring according to claim 2, characterized in that: The annular fixing ring (44) is assembled on the lower end surface of the high and low pressure isolation plate (41) by riveting, so as to facilitate the fixing and installation of the air supply pipe (8).

8. The air-supplementing scroll compressor with a separation ring according to claim 2, characterized in that: The annular fixing ring (44) plays a sealing role on the air supply channel (81); The annular fixing ring (44) plays a role in fixing the first sealing ring (42) and the second sealing ring (43); The annular fixing ring (44) has a height limiting effect on the axial floating of the separation ring (7).

9. The air-supplementing scroll compressor with a separation ring according to claim 1, characterized in that: The floating mechanism comprises: a support member (6) and a pin shaft (61); The support member (6) is arranged at the lower part of the movable scroll (1) and is used to support the movable scroll (1); The pin shaft (61) is fixedly mounted near the outer edge of the support member (6); The pin shaft (61) is movably matched with a pin hole machined on the fixed scroll (2) to limit the circumferential and radial movement of the fixed scroll (2), but does not limit the axial movement of the fixed scroll (2); The pin shaft (61) is assembled with the support member (6) by interference fit, and the number is set to be 2.

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