A variable pressure ratio advance exhaust structure of a pressure dividing cover and scroll compressor

Abstract

The application discloses a variable pressure ratio advance exhaust structure of a scroll compressor, and a pressure distribution cover. The pressure distribution cover is provided with an exhaust hole, and an upper ring of the pressure distribution cover is arranged on the upper surface of the pressure distribution cover and extends upward along the axial direction of the pressure distribution cover. An inner lower ring and an outer lower ring of the pressure distribution cover are arranged on the lower surface of the pressure distribution cover and extend downward along the axial direction of the pressure distribution cover. A U-shaped groove is formed between the inner lower ring and the outer lower ring of the pressure distribution cover. A plurality of small holes are arranged on the pressure distribution cover and are used for connecting the U-shaped groove and the exhaust hole. The application further discloses an advance exhaust structure, which comprises the pressure distribution cover, a sealing disc and a static scroll disc. The application can effectively solve the problem of power consumption increase of the scroll compressor in the over-compression state, and improve the energy efficiency of the scroll compressor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressor, and particularly relates to a variable pressure ratio early exhaust structure of a pressure distribution cover and a scroll compressor. BACKGROUND

[0002] It is known that the scroll compressor is a constant volume ratio compressor, and the actual operation condition changes with the ambient temperature, and when the condensing pressure of the system is lower than the scroll exhaust pressure, over-compression phenomenon is formed. This means that the gas pressure at the moment before the completion of the compression and exhaust of the compressor is higher than the required pressure, and the compressor wastes power and the energy efficiency ratio decreases. The problem of increased power consumption of the compressor in the over-compression state needs to be solved. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a variable pressure ratio early exhaust structure of a pressure distribution cover and a scroll compressor.

[0004] In order to achieve the above purpose, the technical scheme of the present application is as follows:

[0005] On the one hand, the present application discloses a pressure distribution cover, the pressure distribution cover has an exhaust hole, and an upper ring of the pressure distribution cover is arranged on the upper surface of the pressure distribution cover and extends upward along the axial direction of the pressure distribution cover, and an inner lower ring and an outer lower ring of the pressure distribution cover are arranged on the lower surface of the pressure distribution cover and extend downward along the axial direction of the pressure distribution cover, a U-shaped groove is formed between the inner lower ring and the outer lower ring of the pressure distribution cover, and a plurality of small holes are arranged on the pressure distribution cover and used for connecting the U-shaped groove and the exhaust hole.

[0006] The present application discloses a pressure distribution cover, which has the advantages of simple structure, convenient installation, installation on the scroll compressor, and realization of variable pressure ratio early exhaust of the scroll compressor.

[0007] On the basis of the above technical scheme, the following improvements can be made:

[0008] As a preferred scheme, the small holes are through holes penetrating along the axial direction of the pressure distribution cover.

[0009] By adopting the above preferred scheme, the early exhaust gas flow is discharged upward through the axial small holes of the pressure distribution cover and mixed with the upward conventional exhaust, so that the occurrence of turbulence is prevented or weakened, and the noise and surge caused by the turbulence are avoided.

[0010] As a preferred scheme, a plurality of fixing ears are distributed on the outer side surface of the outer lower ring of the pressure distribution cover along the circumferential direction.

[0011] By adopting the above preferred scheme, the connection of the pressure distribution cover and the static scroll plate is facilitated.

[0012] In another aspect, the application also discloses a variable pressure ratio early exhaust structure in a scroll compressor, comprising: any one of the above-mentioned pressure distribution covers, a sealing disc and a static scroll plate, wherein the pressure distribution cover is installed between the sealing disc and the static scroll plate.

[0013] The upper ring of the pressure distribution cover is matched with the sealing disc, the lower inner ring and the lower outer ring of the pressure distribution cover are matched with the static scroll plate respectively, and the exhaust hole of the pressure distribution cover corresponds to the exhaust port of the static scroll plate.

[0014] The outer side of the pressure distribution cover forms a closed back pressure cavity with the sealing disc and the static scroll plate, the back pressure cavity is communicated with a pressure guide channel on the static scroll plate, the pressure guide channel is communicated with a scroll compression cavity of the static scroll plate, and the back pressure cavity and an exhaust cavity at the exhaust port of the static scroll plate are isolated from each other.

[0015] The U-shaped groove of the pressure distribution cover forms a closed early exhaust cavity with the static scroll plate, the early exhaust cavity is communicated with the scroll compression cavity through an early exhaust channel on the static scroll plate, an early exhaust valve for controlling the opening and closing state of the early exhaust channel is installed at the port of the early exhaust channel, the early exhaust cavity and the back pressure cavity are isolated from each other, and the early exhaust cavity is communicated with the exhaust cavity at the exhaust port of the static scroll plate through a plurality of small holes on the pressure distribution cover.

[0016] The application can effectively solve the problem of increased power consumption of the scroll compressor in the over-compression state, at least one group of early exhaust valves are arranged on the top of the static scroll plate, the early exhaust channel is communicated with the scroll compression cavity, when the pressure of the scroll compression cavity is greater than the sum of the current condensation pressure and the valve opening pressure, the early exhaust valve opens the exhaust, at this time, the exhaust pressure is close to the condensation pressure, and the energy efficiency of the scroll compressor is improved.

[0017] Meanwhile, the top of the static scroll plate of the application is provided with a back pressure cavity to provide an axially flexible compressor structure.

[0018] The application decouples the back pressure cavity and the early exhaust cavity by using the pressure distribution cover, greatly improves the space utilization, provides space for the arrangement of the early exhaust channel and the early exhaust valve, and does not interfere with each other, so that the space design is more reasonable.

[0019] As a preferred scheme, a first slot is arranged on the lower surface of the sealing disc, and the upper ring of the pressure distribution cover extends into the first slot.

[0020] By adopting the above-mentioned preferred scheme, the back pressure cavity and the exhaust cavity at the exhaust port of the static scroll plate are isolated.

[0021] As a preferred scheme, a second slot is arranged on the upper surface of the static scroll plate, and the lower outer ring of the pressure distribution cover extends into the second slot.

[0022] By adopting the above-mentioned preferred scheme, the back pressure cavity and the early exhaust cavity are isolated.

[0023] As a preferred scheme, the inner side surface of the lower outer ring of the pressure distribution cover is provided with a convex part protruding outward, and the lower outer ring of the pressure distribution cover is in interference fit with the second notch.

[0024] With the above preferred scheme, the processing cost is low, and the installation is simple.

[0025] As a preferred scheme, the lower outer ring of the pressure distribution cover is sealed with the second notch through a sealing ring.

[0026] With the above preferred scheme, the sealing effect is improved.

[0027] As a preferred scheme, a plurality of fixing ears are distributed on the outer side surface of the lower outer ring of the pressure distribution cover along the circumferential direction, and the fixing member is fixedly connected with the fixed ear and the static vortex disc.

[0028] With the above preferred scheme, the sealing is good, and the structure is stable.

[0029] As a preferred scheme, the upper part of the pressure distribution cover is in contact with the sealing disc through a leaf spring.

[0030] With the above preferred scheme, the sealing disc is advanced out of the sealing position, which is beneficial to establish the pressure difference and improve the sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Figure 1 The structural schematic diagram of the pressure distribution cover provided by the embodiments of the present application.

[0033] Figure 2 The bottom view of the pressure distribution cover provided by the embodiments of the present application.

[0034] Figure 3 The exploded view of the advanced exhaust structure provided by the embodiments of the present application.

[0035] Figure 4 The partial sectional view provided by the embodiments of the present application.

[0036] Figure 5 The Figure 4 The partial enlarged view of the middle A part.

[0037] Figure 6 The schematic diagram of the pressure introduction channel provided by the embodiments of the present application.

[0038] Figure 7The schematic view of the scroll side of the static scroll plate provided by the embodiment of the present application.

[0039] Figure 8 The schematic view of the exhaust side of the static scroll plate provided by the embodiment of the present application.

[0040] Figure 9 The schematic view of the early exhaust passage and the early exhaust valve provided by the embodiment of the present application.

[0041] Figure 10 The schematic view of the installation of the pressure distribution cover and the static scroll plate provided by the embodiment of the present application.

[0042] Figure 11 The schematic view of the installation of the pressure distribution cover and the static scroll plate provided by the embodiment of the present application. Figure 10 The enlarged view of the middle B part.

[0043] Figure 12 The schematic view of the installation of the pressure distribution cover and the static scroll plate provided by the embodiment of the present application.

[0044] Figure 13 The enlarged view of the middle C part. Figure 12

[0045] Wherein: 1-pressure distribution cover, 11-exhaust hole, 12-upper ring of the pressure distribution cover, 13-lower inner ring of the pressure distribution cover, 14-lower outer ring of the pressure distribution cover, 141-convex part, 15-U-shaped groove, 16-small hole, 17-fixing ear, 171-mounting hole, 2-sealing disc, 21-first slot, 3-static scroll plate, 31-exhaust port, 32-lead pressure passage, 33-early exhaust passage, 34-second slot, 35-threaded hole, 4-early exhaust valve, 5-sealing ring, 6-fastener, 7-leaf spring, 8-screw, a-back pressure cavity, b-exhaust cavity, c-early exhaust cavity, d-scroll compression cavity, e-inner cavity of the scroll compressor. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0048] The ordinal numbers “first”, “second”, “third” and the like are used to describe common objects only to indicate different instances of the similar objects, and are not intended to imply that the objects thus described must have a given order in time, space, sequence or in any other way. ​

[0049] In addition, the expression "comprising" elements is an "open" expression that merely means that the corresponding components or steps are present, but it should not be interpreted as excluding additional components or steps.

[0050] To achieve the object of the present application, some embodiments of the variable pressure ratio advance exhaust structure of the scroll compressor are as follows Figures 1-2 As shown in the figure, the pressure distribution cover 1 is generally a circular ring structure, the pressure distribution cover 1 has an exhaust hole 11, and an upper ring 12 of the pressure distribution cover 1 is provided on the upper surface of the pressure distribution cover 1 and extends upward along the axial direction, and a lower inner ring 13 and a lower outer ring 14 of the pressure distribution cover 1 are provided on the lower surface of the pressure distribution cover 1 and extend downward along the axial direction, respectively, the lower inner ring 13 and the lower outer ring 14 form a U-shaped groove 15, and a plurality of small holes 16 are provided on the pressure distribution cover 1, the small holes 16 are used to connect the U-shaped groove 15 and the exhaust hole 11.

[0051] Further, the plurality of small holes 16 are arranged near the lower inner ring 13 of the pressure distribution cover.

[0052] It is worth noting that the distance between the lower inner ring 13 and the lower inner ring 13 of the pressure distribution cover is not limited, that is, the radial dimension of the U-shaped groove 15 can be adjusted according to requirements.

[0053] At the same time, the pressure distribution cover 1 can be but not limited to the circular ring structure described in the embodiment.

[0054] The present application discloses a pressure distribution cover, which has simple structure and is easy to install, and is installed on a scroll compressor to realize advance exhaust of the scroll compressor with variable pressure ratio.

[0055] In order to further optimize the implementation effect of the present application, in some other embodiments, the remaining features are the same, and the difference is that the small hole 16 is a through hole penetrating along the axial direction of the pressure distribution cover 1.

[0056] By using the above preferred scheme, the advance exhaust gas flow is discharged upward through the axial small hole 16 of the pressure distribution cover 1 and mixed with the upward conventional exhaust, which prevents or weakens the occurrence of turbulence and avoids the noise and surge caused by turbulence.

[0057] In order to further optimize the implementation effect of the present application, in some other embodiments, the remaining features are the same, and the difference is that a plurality of fixing ears 17 are distributed on the outer side of the lower outer ring 14 along the circumferential direction.

[0058] By using the above preferred scheme, the connection of the pressure distribution cover 1 and the static scroll plate 3 is facilitated.

[0059] As shown in the figure Figures 3-9As shown, the embodiment of the present application also discloses a variable pressure ratio early exhaust structure in a scroll compressor, comprising: the pressure distribution cover 1, the sealing disc 2 and the static scroll disc 3 disclosed in any of the above embodiments, the pressure distribution cover 1 is installed between the sealing disc 2 and the static scroll disc 3;

[0060] The upper ring 12 of the pressure distribution cover cooperates with the sealing disc 2, the lower inner ring 13 and the lower outer ring 14 of the pressure distribution cover respectively cooperate with the static scroll disc 3, the exhaust hole 11 of the pressure distribution cover 1 corresponds to the exhaust port 31 of the static scroll disc 3;

[0061] The outer side of the pressure distribution cover 1 forms a closed back pressure cavity a with the sealing disc 2 and the static scroll disc 3, the back pressure cavity a is communicated with the pressure guide channel 32 on the static scroll disc 3, the pressure guide channel 32 is communicated with the scroll compression cavity d of the static scroll disc 3, is blocked by the screw 8, is not communicated with the inner cavity e of the scroll compressor, and the back pressure cavity a and the exhaust cavity b at the exhaust port 31 of the static scroll disc 3 are isolated from each other;

[0062] The U-shaped groove 15 of the pressure distribution cover 1 forms a closed early exhaust cavity c with the static scroll disc 3, the early exhaust cavity c can be communicated with the scroll compression cavity d through the early exhaust channel 33 on the static scroll disc 3, the early exhaust valve 4 for controlling the switch state of the early exhaust channel 33 is installed at the port of the early exhaust channel 33, and the early exhaust cavity c and the back pressure cavity a are isolated from each other, and the early exhaust cavity c is communicated with the exhaust cavity b at the exhaust port 31 of the static scroll disc 3 through the plurality of small holes 16 on the pressure distribution cover 1.

[0063] Further, the early exhaust channel 33 can be but is not limited to an up-down straight hole, which is convenient to process and has low processing cost.

[0064] Further, the early exhaust valve 4 can be but is not limited to a mature and reliable reed valve structure, and can have one or more groups arranged in the early exhaust cavity c.

[0065] Further, the size and shape of the lower inner ring 13 and the lower outer ring 14 of the pressure distribution cover can be flexibly adjusted according to the arrangement mode of the early exhaust valve 4, including but not limited to a circular shape, an elliptical shape or various special shapes.

[0066] The present application can effectively solve the problem of increased power consumption of the scroll compressor in the over-compression state, at least one group of early exhaust valves 4 is arranged at the top of the static scroll disc 3, the early exhaust channel 33 is communicated with the scroll compression cavity d, when the pressure of the scroll compression cavity d is greater than the sum of the current condensation pressure and the valve piece opening pressure, the early exhaust valve 4 opens the exhaust, the exhaust pressure at this time is close to the condensation pressure, and the scroll compressor efficiency is improved.

[0067] Meanwhile, the top of the static scroll disc 3 of the present application is provided with the back pressure cavity a to provide an axial flexible compressor structure. The present application can use the existing sealing disc 2 and its installation mode, the tooling and process are universal, and the reliability and economy are good.

[0068] It is worth noting that the U-shaped groove 15 of the pressure distribution cover 1 and the pre-exhaust cavity c formed by the static scroll, the radial dimension of which can be adjusted according to requirements. The number of pre-exhaust passages 33 and pre-exhaust valves 4 is not limited, and can be adjusted according to specific requirements to achieve variable pressure ratio pre-exhaust, with a minimum of 1.1 super-low pressure ratio.

[0069] The present application decouples the back pressure cavity and the pre-exhaust cavity by using the pressure distribution cover, greatly improving the space utilization, providing space for the setting of the pre-exhaust passage and the pre-exhaust valve, and avoiding interference, so that the space design is more reasonable.

[0070] In order to further optimize the implementation effect of the present application, in some other embodiments, the remaining technical features are the same, except that the small hole 16 is a through hole along the axial direction of the pressure distribution cover 1.

[0071] By adopting the above preferred scheme, the pressure distribution cover 1 separates the pre-exhaust cavity c and the exhaust cavity b at the exhaust port 31 of the static scroll plate 3 by using the lower inner ring 13 of the pressure distribution cover 1. The pre-exhaust gas flow passes through the axial small hole 16 on the pressure distribution cover 1 and is discharged upwardly, mixed with the normal exhaust gas at the exhaust port 31, preventing or weakening the occurrence of turbulence, avoiding the noise and surge caused by turbulence, and reducing the noise of valve plate beating and airflow pulsation when the pre-exhaust valve 4 operates.

[0072] In order to further optimize the implementation effect of the present application, in some other embodiments, the remaining technical features are the same, except that a first notch 21 is arranged on the lower surface of the sealing disc 2, and the upper ring 12 of the pressure distribution cover extends into the first notch 21.

[0073] By adopting the above preferred scheme, the back pressure cavity a is isolated from the exhaust cavity b at the exhaust port 31 of the static scroll plate 3.

[0074] In order to further optimize the implementation effect of the present application, in some other embodiments, the remaining technical features are the same, except that a second notch 34 is arranged on the upper surface of the static scroll plate 3, and the lower outer ring 14 of the pressure distribution cover extends into the second notch 34.

[0075] By adopting the above preferred scheme, the back pressure cavity a is isolated from the pre-exhaust cavity c.

[0076] Further, on the basis of the above embodiments, as shown in Figures 10-11 A plurality of fixing ears 17 are distributed on the outer side of the lower outer ring 14 of the pressure distribution cover 1 along the circumferential direction thereof, and a plurality of threaded holes 35 are arranged on the upper surface of the static scroll plate 3 along the circumferential direction thereof. A fastener 6 (such as a screw) passes through the mounting hole 171 on the fixing ear 17 and extends into the threaded hole 35 on the static scroll plate 3, locking the pressure distribution cover 1 on the static scroll plate 3.

[0077] Meanwhile, the lower outer ring 14 of the pressure distribution cover is sealed with the sealing ring 5 between the second notch 34, and the structure is good in sealing and mature and reliable.

[0078] It is worth noting that in some other embodiments, the mounting mode is as follows, as shown in the figure, the inner side of the lower outer ring 14 of the pressure distribution cover is provided with a convex part 141 protruding outward, and the lower outer ring 14 of the pressure distribution cover is in interference fit with the second notch 34. Figures 12-13

[0079] The structure is low in processing cost and simple in mounting. In some other embodiments, the interference fit structure can be used in the connection structure of the fixing lug 17 and the fastener 6. Figure 5

[0080] In order to further optimize the implementation effect of the application, in some other embodiments, the remaining features are the same, and the difference is that the upper part of the pressure distribution cover 1 is in contact with the sealing disc 2 through the plate spring 7.

[0081] The preferred scheme is adopted, the sealing disc is advanced out of the sealing position, the pressure difference is beneficial to be established, and the sealing effect is improved.

[0082] The above various embodiments can be cross-parallel implemented.

[0083] In the description of the application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0084] In the application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the application can be understood according to the specific meaning of the above-mentioned terms in the application according to the specific situation.

[0085] ​​The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application, and the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A structure for advance discharge with variable compression ratio in a scroll compressor, characterized by, The application relates to a back pressure cover for a scroll compressor, comprising: a back pressure cover, a sealing disc and a static scroll disc, wherein the back pressure cover is arranged between the sealing disc and the static scroll disc; the back pressure cover is provided with exhaust holes and a back pressure cover upper ring extending axially upward on the upper surface of the back pressure cover, and is provided with a back pressure cover lower inner ring and a back pressure cover lower outer ring extending axially downward on the lower surface of the back pressure cover respectively, a U-shaped groove is formed between the back pressure cover lower inner ring and the back pressure cover lower outer ring, and a plurality of small holes are arranged on the back pressure cover and used for connecting the U-shaped groove and the exhaust holes; the small holes are through holes extending axially through the back pressure cover; the back pressure cover upper ring is matched with the sealing disc, the back pressure cover lower inner ring and the back pressure cover lower outer ring are matched with the static scroll disc respectively, and the exhaust holes of the back pressure cover correspond to exhaust ports of the static scroll disc; the outer side of the back pressure cover forms a closed back pressure cavity with the sealing disc and the static scroll disc, the back pressure cavity is communicated with a pressure lead-through channel on the static scroll disc, the pressure lead-through channel is communicated with a scroll compression cavity of the static scroll disc, and the back pressure cavity is isolated from an exhaust cavity at the exhaust ports of the static scroll disc; the U-shaped groove of the back pressure cover forms a closed early exhaust cavity with the static scroll disc, the early exhaust cavity is communicated with the scroll compression cavity through an early exhaust channel on the static scroll disc, an early exhaust valve for controlling the opening and closing state of the early exhaust channel is arranged at the port of the early exhaust channel, the early exhaust cavity is isolated from the back pressure cavity, and the early exhaust cavity is communicated with the exhaust cavity at the exhaust ports of the static scroll disc through the plurality of small holes on the back pressure cover.

2. The early exhaust structure according to claim 1, characterized by, a first slot is arranged on the lower surface of the sealing disc, and the back pressure cover upper ring extends into the first slot.

3. The early exhaust structure according to claim 1, characterized by, a second slot is arranged on the upper surface of the static scroll disc, and the back pressure cover lower outer ring extends into the second slot.

4. The early exhaust structure according to claim 3, characterized by, a convex part protruding outward is arranged on the inner side of the back pressure cover lower outer ring, and the back pressure cover lower outer ring is interference-fitted with the second slot.

5. The early exhaust structure according to claim 3, characterized by the back pressure cover lower outer ring and the second slot are sealed by a sealing ring.

6. The early exhaust structure according to claim 3, characterized by, a plurality of fixing lugs are distributed on the outer side of the back pressure cover lower outer ring along the circumferential direction, and a fixing member is used for fixing the fixing lugs and the static scroll disc.

7. The early exhaust structure according to any one of claims 1 to 6, characterized by, the upper part of the back pressure cover is in contact with the sealing disc through a plate spring.

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