Enthalpy-increasing non-return structure, scroll compressor and air conditioner

Abstract

The enthalpy-increasing non-return structure comprises an assembly carrier, an air supplementing and enthalpy-increasing pipe and a circular ring on-off switching piece, an air supplementing through hole is formed in the assembly carrier, the circular ring on-off switching piece is located in the air supplementing through hole, the inner ring area of the circular ring on-off switching piece corresponds to the outlet position of the air supplementing and enthalpy-increasing pipe, and the outer ring area of the circular ring on-off switching piece corresponds to the outlet position of the air supplementing and enthalpy-increasing pipe. The outer ring area of the circular ring on-off switching piece corresponds to the inlet position of the air supplementing hole, and when the refrigerant pressure in the air supplementing enthalpy increasing pipe is higher than the refrigerant pressure in the compression cavity, the circular ring on-off switching piece can expand and deform outwards in the radial direction under the action of the internal and external pressure difference so as to be switched to the air supplementing state. And when the refrigerant pressure in the air supplementing and enthalpy increasing pipe is lower than the refrigerant pressure of the compression cavity, the circular ring on-off switching piece can be folded and deformed inwards in the radial direction under the action of the internal and external pressure difference so as to be switched to the non-return state. The number of adopted parts is small, the assembly process is simplified, and occupied space of the compressor is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air conditioning, and particularly relates to a enthalpy-increasing check valve structure, scroll compressor and air conditioner. BACKGROUND

[0002] The scroll compressor is composed of a closed shell, a static disc, a dynamic disc, a support, an eccentric crankshaft, an anti-rotation mechanism and an electric mechanism. The type lines of the dynamic and static scroll discs are spiral, the dynamic disc is installed eccentrically relative to the static scroll disc by 180 degrees, and a plurality of crescent spaces are formed between the dynamic and static scroll discs. The dynamic disc rotates and moves horizontally without self-rotation with the center of the static scroll disc as the rotation center and with a certain rotation eccentric radius, the outer circle crescent space moves to the center constantly, at this time, the refrigerant is gradually pushed to the center space, the volume of the center space is reduced constantly and the pressure is increased constantly, until the center exhaust hole is communicated, the high-pressure refrigerant is discharged from the pump body, and the compression process is completed.

[0003] The existing high-pressure cavity scroll compressor gas supplement structure mainly includes a static scroll disc with an enthalpy-increasing hole, an enthalpy-increasing pipe and an enthalpy-increasing assembly cooperating with the static disc. When the system gas supplement valve is opened, the low-temperature and high-pressure gas is injected into the middle compression cavity of the static disc through the enthalpy-increasing pipe, the enthalpy-increasing channel and the enthalpy-increasing hole to reduce the temperature of the scroll disc, improve the reliability of the scroll compressor, meet the operation demand of the low-environment-temperature air conditioning system and improve the energy efficiency.

[0004] However, during the whole year operation, when the system is operated under the non-gas supplement condition, the compressed gas in the scroll compression cavity will flow back to the enthalpy-increasing channel through the enthalpy-increasing hole to produce gas expansion and a large residual volume, and thus the compressor energy efficiency under the non-gas supplement condition is reduced.

[0005] In view of the foregoing, the conventional scroll compressor currently available on the market mainly sets an enthalpy-increasing check valve assembly to realize the enthalpy-increasing check valve function. For example, the patent with the publication number CN218644470U discloses an enthalpy-increasing check valve structure. Specifically, an enthalpy-increasing sink groove is formed on the back of a static plate. An enthalpy-increasing anti-reverse spring and an enthalpy-increasing anti-reverse valve plate are sequentially placed in the sink groove from bottom to top. An enthalpy-increasing connecting seat and a matching sealing ring are arranged at the connection between the sink groove and an enthalpy-increasing pipe. The enthalpy-increasing connecting seat is fixed to the back of the static plate by two screws. When the system air supply valve is closed, the enthalpy-increasing anti-reverse valve plate is tightly attached to the lower surface of the enthalpy-increasing connecting seat under the action of the pre-compression enthalpy-increasing anti-reverse spring, so that the downward enthalpy-increasing passage is closed. When the system air supply valve is opened, the low-temperature and high-pressure refrigerant gas flows downward through the enthalpy-increasing pipe, passes through the enthalpy-increasing connecting seat, and impacts the enthalpy-increasing anti-reverse valve plate from the flow-through hole in the middle of the enthalpy-increasing connecting seat, thereby compressing the enthalpy-increasing anti-reverse spring. The refrigerant flows downward through the static plate enthalpy-increasing hole from the flow-through hole beside the enthalpy-increasing anti-reverse valve plate and enters the compression cavity. The above process realizes the enthalpy-increasing check valve function. The enthalpy-increasing check valve assembly (excluding the enthalpy-increasing straight pipe and the sealing ring thereof) includes one enthalpy-increasing anti-reverse spring, one enthalpy-increasing anti-reverse valve plate, one enthalpy-increasing connecting seat, one enthalpy-increasing connecting seat sealing ring, and two enthalpy-increasing connecting seat fixing screws. Therefore, there are problems such as a large number of parts, a complex assembly process, and a large occupation of compressor space. SUMMARY

[0006] Therefore, the present application provides an enthalpy-increasing check valve structure, a scroll compressor, and an air conditioner, which can overcome the problems of a large number of parts, a complex assembly process, and a large occupation of compressor space in the related art.

[0007] To solve the above problems, the application provides a kind of increase antireflux structure, including assembly carrier, gas supplement increase antireflux pipe, circular ring on-off switch piece, the assembly carrier is formed with the gas supplement through hole passing through its opposite sides, the first port of the gas supplement through hole inserts the gas supplement increase antireflux pipe, the second port of the gas supplement through hole is communicated with the compression cavity of pump body assembly via gas supplement hole, the circular ring on-off switch piece is in the gas supplement through hole, the inner ring area of the circular ring on-off switch piece corresponds with the outlet position of the gas supplement increase antireflux pipe, the outer ring area of the circular ring on-off switch piece corresponds with the inlet position of the gas supplement hole, the circular ring on-off switch piece has gas supplement state and check state, when the refrigerant pressure in the gas supplement increase antireflux pipe is higher than the refrigerant pressure in the compression cavity, the circular ring on-off switch piece can be expanded and deformed along its radial direction under the action of the pressure difference between its inside and outside to switch to the gas supplement state, when the circular ring on-off switch piece is in the gas supplement state, the inner ring area of the circular ring on-off switch piece is communicated with the gas supplement hole, when the refrigerant pressure in the gas supplement increase antireflux pipe is lower than the refrigerant pressure of the compression cavity, the circular ring on-off switch piece can be folded and deformed along its radial direction under the action of the pressure difference between its inside and outside to switch to the check state, when the circular ring on-off switch piece is in the check state, the inner ring area of the circular ring on-off switch piece is cut off with the gas supplement hole.

[0008] In some embodiments, the second port of the gas supplement through hole is communicated with the gas supplement hole via an expanded ring groove, the circular ring on-off switch piece is assembled in the expanded ring groove, and the axial height of the circular ring on-off switch piece is greater than the axial depth of the expanded ring groove so that the circular ring on-off switch piece has a part in the second port, and the outer ring diameter of the circular ring on-off switch piece when it is in the gas supplement state is equal to the hole diameter of the second port of the gas supplement through hole, and the outer ring diameter of the circular ring on-off switch piece when it is in the check state is smaller than the hole diameter of the second port of the gas supplement through hole.

[0009] In some embodiments, the circular ring on-off switch piece has a slit passing through its inner and outer ring walls, and the parts of the circular ring on-off switch piece corresponding to the slit are left end butt joint and right end butt joint respectively, the end faces of the left end butt joint and the right end butt joint are opposite and fit when the circular ring on-off switch piece is in the check state, the end faces of the left end butt joint and the right end butt joint are away from each other and form a flow port at the away area when the circular ring on-off switch piece is in the gas supplement state, the outer diameter of the expanded ring groove is greater than the diameter of the second port, and the gas supplement hole is on the groove bottom wall of the expanded ring groove in the outer ring area of the circular ring on-off switch piece when the circular ring on-off switch piece is in the gas supplement state.

[0010] In some embodiments, the gas supplement hole has a plurality of gas supplement holes, and the plurality of gas supplement holes are uniformly spaced around the central axis of the expanded ring groove.

[0011] In some embodiments, the slit is a straight slit extending along the diameter direction of the circular ring on-off switch.

[0012] In some embodiments, the projection of the slit on any radial plane of the circular ring on-off switch is in a zigzag shape.

[0013] In some embodiments, the left end adapter has a radially outer arc arm, the right end adapter has a radially inner arc arm, the radially outer arc arm and the radially inner arc arm both have the flow passage extending in the radial direction of the circular ring on-off switch, and when the circular ring on-off switch is in the air supplementing state, the flow passage on the radially inner arc arm and the flow passage on the radially outer arc arm at least partially communicate in the radial direction of the circular ring on-off switch, the radially outer arc arm has a first sealing head on the side of the flow passage thereof close to the right end adapter, and the radially inner arc arm has a second sealing head on the side of the flow passage thereof close to the left end adapter, when the circular ring on-off switch is in the non-return state, the first sealing head can block the flow passage on the right end adapter, and the second sealing head can block the flow passage on the left end adapter.

[0014] In some embodiments, the left end adapter and the right end adapter are provided with accommodating grooves on the opposite end faces thereof, and an elastic stretching member is arranged between the two accommodating grooves.

[0015] The application further provides a scroll compressor comprising the above-mentioned enthalpy-increasing non-return structure, and the assembly carrier is a static scroll of the scroll compressor.

[0016] In some embodiments, the scroll compressor further comprises a casing upper cover, one end of the air supplementing and enthalpy-increasing pipe away from the static scroll is a first end, and one end of the air supplementing and enthalpy-increasing pipe close to the static scroll is a second end, the first end is welded to the casing upper cover, the second end is gap-inserted into the first port of the air supplementing through hole, and a sealing ring is further arranged between the air supplementing and enthalpy-increasing pipe and the air supplementing through hole.

[0017] The application further provides an air conditioner comprising the above-mentioned scroll compressor.

[0018] The application provides an enthalpy-increasing non-return structure, a scroll compressor and an air conditioner, which have the following beneficial effects: The ring on-off switch is arranged on the supplement air path between the outlet of the supplement air increasing enthalpy pipe and the supplement air hole, and is deformed outwardly along the radial direction or inwardly along the radial direction under the pressure difference between the inner and outer ring walls, so that the ring on-off switch is switched between the non-return state and the supplement air state, and the control of supplement air of the supplement air increasing enthalpy pipe into the compression cavity or the control of preventing the refrigerant in the compression cavity from flowing into the supplement air increasing enthalpy pipe is realized, the number of parts is extremely small, the assembly process is simplified, and the ring on-off switch in the application is deformed along the radial direction, i.e. the extension direction of the disc plane of the static scroll, so that the space of the compressor, especially the axial space, is occupied, the compact design of the compressor is facilitated, and the clearance volume is relatively small. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the following embodiment or related art description will be briefly introduced. The drawings in the following description are only exemplary, and other embodiment drawings can be obtained by the provided drawings without paying creative labor for those skilled in the art.

[0020] Figure 1 is a three-dimensional structure schematic diagram of the enthalpy increasing non-return structure in the embodiment of the present application, and the assembly carrier in the figure is taken as an example of the static scroll; Figure 2 is Figure 1 an internal structure schematic diagram of the enthalpy increasing non-return structure in the embodiment of the present application; Figure 3 is Figure 2 a partial enlarged view of A in the embodiment of the present application; Figure 4 is Figure 1 a bottom view of the static scroll in the embodiment of the present application (i.e. the end face shown in the figure is the one-side end face with scroll teeth); Figure 5 is a structure schematic diagram of the static scroll at the local position of the supplement air through hole; Figure 6 is an axial section schematic diagram of the ring on-off switch in the first embodiment of the embodiment of the present application; Figure 7 is an axial projection view of the ring on-off switch in the first embodiment of the embodiment of the present application, and the ring on-off switch in the figure is in the non-return state; Figure 8 is Figure 7 a three-dimensional structure schematic diagram of the ring on-off switch in the embodiment of the present application; Figure 9 is an axial projection view of the ring on-off switch in the first embodiment of the embodiment of the present application, and the ring on-off switch in the figure is in the supplement air state; Figure 10 is Figure 9Fig. 3 is a perspective view of the ring-shaped on-off switch in Fig. 1 in a free state; Figure 11 Fig. 4 is a schematic diagram of refrigerant pressure partition of the increased-enthalpy check valve structure of the present application; Figure 12 Fig. 5 is a perspective view of the ring-shaped on-off switch in the second embodiment of the present application in a free state; Figure 13 Fig. 6 is a perspective view of the ring-shaped on-off switch in Fig. 5 in a free state; Figure 12 Fig. 7 is a perspective view of the ring-shaped on-off switch in Fig. 5 in a free state; Figure 14 Fig. 8 is a perspective view of the ring-shaped on-off switch in the third embodiment of the present application in a free state; Figure 15 Fig. 9 is a perspective view of the ring-shaped on-off switch in Fig. 8 in a free state; Figure 14 Fig. 10 is a perspective view of the ring-shaped on-off switch in Fig. 8 in a free state; Figure 16 Fig. 11 is an axial projection view of the ring-shaped on-off switch in Fig. 8. Figure 15 Reference signs are as follows:

[0021] 1, assembly carrier; 11, air supplementing through hole; 12, air supplementing hole; 13, flared ring groove; 14, center exhaust hole of static disc; 15, air suction port of static disc; 2, air supplementing increased-enthalpy pipe; 3, ring-shaped on-off switch; 30, overflow port; 31, left end butt joint; 311, first sealing head; 32, right end butt joint; 321, second sealing head; 33, elastic stretching member; 100, sealing ring. DETAILED DESCRIPTION The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022]

[0023] ​In the description of the present application, it needs to be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0024] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0025] In addition, it needs to be pointed out that the use of "first", "second" and the like to define parts only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the above words have no special meaning, therefore, it cannot be understood as a limitation on the scope of protection of the present application.

[0026] For reference Figures 1 to 16As shown, according to the embodiment of the present application, a kind of enthalpy increasing check valve structure is provided, including assembly carrier 1, air supplementing enthalpy increasing pipe 2, circular ring on-off switch 3, the air supplementing through hole 11 of the assembly carrier 1 is formed with the opposite two sides, the first port of the air supplementing through hole 11 inserts the air supplementing enthalpy increasing pipe 2, the second port of the air supplementing through hole 11 is communicated with the compression cavity (not shown in the drawing, not marked, that is the compression cavity of compressor) of the pump body assembly of compressor via air supplementing hole 12, the aforementioned assembly carrier 1 is specifically the part of the pump body assembly, according to the type of compressor, the specific structure of the assembly carrier 1 can also be flexibly selected, for example, when the compressor is scroll compressor, the aforementioned assembly carrier 1 can be static scroll, when the compressor is roller compressor, the aforementioned assembly carrier 1 can be one of upper and lower flanges or the structure such as middle baffle, cylinder of pump body assembly, the following specific technology solution is described with the assembly carrier 1 as static scroll as example, the circular ring on-off switch 3 is in the air supplementing through hole 11, the inner ring area (see Figure 11 As shown) of the circular ring on-off switch 3 corresponds to the outlet position of the air supplementing enthalpy increasing pipe 2, the outer ring area (see Figure 11 As shown) of the circular ring on-off switch 3 corresponds to the inlet position of the air supplementing hole 12, the circular ring on-off switch 3 has air supplementing state and check valve state, when the refrigerant pressure (P1 indicated in Figure 11 ) in the air supplementing enthalpy increasing pipe 2 is higher than the refrigerant pressure (P2 indicated in Figure 11 ) in the compression cavity, the circular ring on-off switch 3 can expand deformation along its radial direction outward under the action of inner and outer pressure difference to switch to the air supplementing state, when the circular ring on-off switch 3 is in the air supplementing state, the inner ring area of the circular ring on-off switch 3 is communicated with the air supplementing hole 12, when the refrigerant pressure in the air supplementing enthalpy increasing pipe 2 is lower than the refrigerant pressure of the compression cavity, the circular ring on-off switch 3 can contract deformation along its radial direction inward under the action of inner and outer pressure difference to switch to the check valve state, when the circular ring on-off switch 3 is in the check valve state, the inner ring area of the circular ring on-off switch 3 is cut off with the air supplementing hole 12, in one specific embodiment, the annular center axis of the aforementioned circular ring on-off switch 3 coincides with the center line of the air supplementing through hole 11, further, the air supplementing through hole 11 coincides with the outlet straight pipe center line of air supplementing enthalpy increasing pipe 2.

[0027] The technical scheme is characterized in that a circular ring on-off switch 3 is arranged on a gas supplement path between an outlet of the gas supplement and enthalpy increasing pipe 2 and the gas supplement hole 12, and the circular ring on-off switch 3 is deformed outwardly along a radial direction or inwardly along the radial direction under the pressure difference between the inner and outer ring walls, so that the circular ring on-off switch 3 is switched between the non-return state and the gas supplement state, and the control of supplementing gas into the compression cavity by the gas supplement and enthalpy increasing pipe 2 or preventing the refrigerant in the compression cavity from flowing into the gas supplement and enthalpy increasing pipe 2 is realized. The structure has a small number of parts, and the assembly process is simplified. Since the circular ring on-off switch 3 in the application is deformed along the radial direction, i.e., the direction of the disc plane of the static scroll, the space occupied by the circular ring on-off switch 3, especially the axial space, is reduced, which is beneficial to the compact design of the compressor, and the clearance volume is relatively small.

[0028] In some embodiments, the second port of the gas supplement through hole 11 and the gas supplement hole 12 are communicated via a flared ring groove 13, the circular ring on-off switch 3 is assembled in the flared ring groove 13, and the axial height of the circular ring on-off switch 3 is greater than the axial depth of the flared ring groove 13, so that the circular ring on-off switch 3 has a part in the second port. For details, see Figure 5 and Figure 6 It is shown that the axial height of the circular ring on-off switch 3 is H2, the axial depth of the flared ring groove 13 is H1, H2 is greater than H1, so that the top side end surface of the circular ring on-off switch 3 is in the range of the second port, the outer ring diameter of the circular ring on-off switch 3 in the gas supplement state is equal to the hole diameter of the second port of the gas supplement through hole 11, and the outer ring diameter of the circular ring on-off switch 3 in the non-return state is smaller than the hole diameter of the second port of the gas supplement through hole 11.

[0029] In the technical scheme, the top side end surface of the circular ring on-off switch 3 is limited in the second port of the gas supplement through hole 11, so that the deformation maximum position of the circular ring on-off switch 3 can be limited by the edge of the second port of the gas supplement through hole 11. In this way, the maximum gas supplement amount of the circular ring on-off switch 3 can be set, and at the same time, the radial expansion or contraction of the circular ring on-off switch 3 is limited in the second port of the gas supplement through hole 11, so that the position switching of the circular ring on-off switch 3 is smooth, stable and reliable. It can be understood that the outer ring diameter of the circular ring on-off switch 3 should not be smaller than the inner diameter of the outlet of the gas supplement and enthalpy increasing pipe 2.

[0030] As a feasible implementation, the aforementioned annular on-off switch 3 can be, for example, a whole annular body structure that can expand or retract in its radial direction. When the pressure in the inner ring area is higher than that in the outer ring area, the whole annular on-off switch 3 is translated outward in its radial direction, and in the process of translation, the inner ring wall surface thereof will expand outward until the aforementioned air supplement hole 12 is in the inner ring area of the annular on-off switch 3, realizing the communication between the air supplement and enthalpy-increasing pipe 2 and the air supplement hole 12. At this time, the annular on-off switch 3 is in the air supplement state. Conversely, when the pressure in the outer ring area is higher than that in the inner ring area, the whole annular on-off switch 3 is translated inward in its radial direction, and in the process of translation, the inner ring wall surface thereof will switch from the outside to the inside of the air supplement hole 12, so that the air supplement hole 12 is in the outer ring area of the annular on-off switch 3, and the inner ring area and the outer ring area are separated by the whole annular wall. At this time, the annular on-off switch 3 is in the non-return state.

[0031] As another feasible implementation, the annular on-off switch 3 has a slit (not marked in the figure) through the inner and outer ring walls thereof, that is, the annular on-off switch 3 at this time is no longer a complete whole annular structure in an objective sense. The parts of the annular on-off switch 3 corresponding to the slit are respectively the left end butt joint 31 and the right end butt joint 32. When the annular on-off switch 3 is in the non-return state, the end faces of the left end butt joint 31 and the right end butt joint 32 are in opposite abutment. The annular on-off switch 3 in this state is a whole annular state, and the abutted left end butt joint 31 and right end butt joint 32 form a reliable seal. When the annular on-off switch 3 is in the air supplement state, the end faces of the left end butt joint 31 and the right end butt joint 32 are away from each other and form an overflow port 30 in the area away from each other. The outer diameter of the flared ring groove 13 is greater than the diameter of the second port. When the annular on-off switch 3 is in the air supplement state, the air supplement hole 12 is on the groove bottom wall of the flared ring groove 13 in the outer ring area of the annular on-off switch 3. When the annular on-off switch 3 is in the air supplement state, the refrigerant in the inner ring area of the annular on-off switch 3 can communicate with the air supplement hole 12 on the groove bottom wall of the flared ring groove 13 via the overflow port 30 and the flared ring groove 13, thereby realizing the purpose of air supplement and enthalpy increase into the compression cavity.

[0032] In the technical solution, the through slit is formed on the inner wall surface of the circular ring switching member 3, so that when the circular ring switching member 3 expands along the radial direction under the pressure difference between the inner and outer wall surfaces, the left end abutting joint 31 and the right end abutting joint 32 of the circular ring switching member 3 are away from each other to form the flow port 30, and the greater the pressure difference, the greater the distance between the two abutting joints, and the greater the flow area of the flow port 30. In this way, on the one hand, the state switching of the circular ring switching member 3 is more smooth, especially the process of switching from the non-return state to the air supplement state is more smooth, without the need for synchronous large displacement deformation of the entire circumference of the circular ring switching member 3, thereby improving the service life and reliability of the component, and on the other hand, the size of the flow port 30 and the pressure difference can be formed to follow, thereby realizing the follow-up adjustment of the air supplement flow.

[0033] In some embodiments, the air supplement holes 12 are provided in multiple numbers and are uniformly spaced around the central axis of the flared ring groove 13. In a specific embodiment, two air supplement holes 12 are provided. It can be understood that the flared ring groove 13 can uniformly distribute the refrigerant flowing out of the flow port 30 in the circumferential direction, thereby ensuring the smooth switching of the position of the circular ring switching member 3.

[0034] In some embodiments, the slit is a straight slit extending along the diameter direction of the circular ring switching member 3, as shown in FIG. 1, which is a first embodiment of the circular ring switching member 3 of the present application and has the advantage of simple structure. Figure 7

[0035] In some embodiments, the projection of the slit on any radial plane of the circular ring switching member 3 is in the shape of a Z letter, as shown in FIG. 2, which is a second embodiment of the circular ring switching member 3 of the present application. The Z-shaped slit can form a zigzag seal when the circular ring switching member 3 is in the non-return state, thereby improving the non-return effect, i.e., the sealing effect, in this state. Figure 13

[0036] In some embodiments, the left end abutting joint 31 has a radial outer arc arm (not labeled in the figure), and the right end abutting joint 32 has a radial inner arc arm (not labeled in the figure). After the circular ring switching member 3 is assembled in the second port of the air supplement through hole 11, the radial inner arc arm is on the radial inner side of the radial outer arc arm, and the radial inner arc arm and the radial outer arc arm always form a lap joint in the radial direction of the circular ring switching member 3 and can slide along the lap joint surface of each other during the state switching of the circular ring switching member 3. The radial outer arc arm and the radial inner arc arm both have the flow port 30 (see FIG. 1) penetrating in the radial direction of the circular ring switching member 3. Figure 12 Figure 13 ​​​The overcurrent port 30 on the radially inner arc arm has a second sealing head 321 on the side of the overcurrent port 30 on the radially inner arc arm close to the left end butt joint 31, and when the circular ring on-off switch 3 is in the non-return state, the first sealing head 311 can block the overcurrent port 30 on the right end butt joint 32, and the second sealing head 321 can block the overcurrent port 30 on the left end butt joint 31.

[0037] In the technical solution, the relative position relationship between the first sealing head 311 and the overcurrent port 30 on the radially outer arc arm and the relative position relationship between the second sealing head 321 and the overcurrent port 30 on the radially inner arc arm are adjusted, so that the switching between the air supplement state and the non-return state of the circular ring on-off switch 3 can be realized, the control of the air supplement flow can be realized, and the stable switching of the state of the circular ring on-off switch 3 can be ensured due to the inner and outer lap of the radially inner arc arm and the radially outer arc arm in the radial direction of the circular ring on-off switch 3.

[0038] In some embodiments, accommodating grooves (not labeled in the figure) are formed on the end faces of the left end butt joint 31 and the right end butt joint 32 opposite to each other, and an elastic tensioning member 33 is arranged between the two accommodating grooves. The elastic tensioning member 33 can be a cold-antimicrobial corrosion-resistant tension spring, which can always apply a pulling force to the left end butt joint 31 and the right end butt joint 32, so that the end faces of the two end heads are more closely attached when the circular ring on-off switch 3 is in the non-return state, and the non-return sealing property is ensured. It can be understood that when the circular ring on-off switch 3 is in the non-return state, the elastic tensioning member 33 is completely accommodated in the two accommodating grooves, and the complete attachment and sealing of the two end faces are ensured.

[0039] According to the embodiments of the present application, a scroll compressor is also provided, which comprises the above-mentioned enthalpy-increasing non-return structure, and the assembly carrier 1 is a static scroll of the scroll compressor.

[0040] In some embodiments, the scroll compressor further comprises a casing upper cover, one end of the air supplement enthalpy-increasing pipe 2 away from the static scroll is a first end, and the other end close to the static scroll is a second end. The first end is welded to the casing upper cover, the second end is gap-inserted into the first port of the air supplement through hole 11, and a sealing ring 100 is further arranged between the air supplement enthalpy-increasing pipe 2 and the air supplement through hole 11. In this way, the assembly process of the air supplement enthalpy-increasing pipe 2 and the static scroll can be further simplified.

[0041] The aforementioned circular ring on-off switch 3 should be made of a material (for example, PTFE (Polytetrafluoroethylene) containing carbon fibers) that can be elastically deformed under the action of a preset pressure difference and has a certain rigidity (for example, PTFE (Polytetrafluoroethylene) containing carbon fibers). The rigidity should be able to ensure that the circular ring on-off switch 3 can be deformed by force while meeting the requirement of controllable deformation. Specifically, the rigidity can be reasonably selected through relevant tests.

[0042] The working process of the increased-enthalpy check valve structure of the present application is as follows: When the compressor is running, the refrigerant enters the compression chamber from the suction port 15 of the static disc. The dynamic scroll disc rotates around the center of the static scroll disc as the rotating center and performs a non-self-rotating revolution with a certain rotating eccentric radius. The outer circle crescent-shaped space is constantly moving towards the center. At this time, the refrigerant is gradually pushed to the center space, and its volume is constantly reduced while the pressure is constantly rising, until it is communicated with the center exhaust hole 14 of the static disc. The high-pressure refrigerant is discharged from the center exhaust hole 14 of the static disc. When the compressor is running for a long time, the temperature of the scroll disc is relatively high, and low-temperature high-pressure refrigerant needs to be injected from the supplementary gas increased-enthalpy pipe 2 (i.e., the supplementary gas increased-enthalpy is opened) to reduce the temperature of the scroll disc and improve the reliability of the compressor. When the compressor is running normally and the increased-enthalpy does not need to be opened, the circular ring on-off switch 3 is in a check valve state. In this state, the upper and lower surfaces of the circular ring on-off switch 3 are sealed with the lower end of the supplementary gas increased-enthalpy pipe 2 and the bottom surface of the flared ring groove 13, respectively, and the flow port 30 is closed at the same time. At this time, the pressure p1 in the internal ring area of the circular ring on-off switch 3 (i.e., the pressure in the internal ring area) is less than the pressure p2 outside (p2 is always the pressure at the increased-enthalpy port of the compression chamber, i.e., the pressure in the external ring area), which further ensures that the circular ring on-off switch 3 is in a check valve state under the action of the internal and external pressure difference. When the system opens the increased-enthalpy, the system injects low-temperature high-pressure refrigerant from the supplementary gas increased-enthalpy pipe 2 into the flared ring groove 13, and the pressure p1 in the internal ring area of the circular ring on-off switch 3 rapidly increases. When p1 is greater than p2, the circular ring on-off switch 3 is constantly expanded under the action of the internal and external pressure difference until the outer wall of the circular ring on-off switch 3 is tightly attached to the inner wall of the second port of the supplementary gas through hole 11, i.e., the outer diameter D3 of the circular ring on-off switch 3 is equal to the diameter D1 of the second port of the supplementary gas through hole 11, and the circular ring on-off switch 3 is switched from the check valve state to the supplementary gas state. At this time, the refrigerant in the circular ring on-off switch 3 flows out from the flow port 30 of the circular ring on-off switch 3, enters the supplementary gas hole 12, and enters the compression chamber, thereby reducing the temperature of the pump body. When the system is switched from the increased-enthalpy opening state to the increased-enthalpy closing state, the pressure p1 in the internal ring area of the circular ring on-off switch 3 is less than the pressure p2 outside, so the circular ring on-off switch 3 is switched from the supplementary gas state to the check valve state under the action of its own structure and the internal and external pressure difference, thereby preventing the refrigerant in the compression chamber from flowing back into the supplementary gas increased-enthalpy pipe 2.

[0043] The core feature of the present application is that the circular ring on-off switching piece 3 keeps the opening closed or open according to the need (i.e. state switching) under the action of its own structure and the internal and external pressure difference, realizes the closing and opening of the enthalpy-increasing channel, and further realizes the air supplementing / non-return function. Compared with the traditional enthalpy-increasing non-return structure design, the number of compressor parts can be reduced, the assembly process can be simplified, and the space occupied by the back of the static disc can be reduced on the premise of realizing the enthalpy-increasing non-return function and ensuring the reliability of the compressor.

[0044] According to the embodiments of the present application, an air conditioner is also provided, which comprises the scroll compressor.

[0045] It is easy for those skilled in the art to understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0046] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A positive closing check structure, characterized by, The application relates to a refrigerant supplementing and enthalpy increasing device, which comprises an assembly carrier (1), a refrigerant supplementing and enthalpy increasing pipe (2) and a circular ring on-off switch (3). A refrigerant supplementing hole (11) is formed in the assembly carrier (1) and penetrates through opposite sides of the assembly carrier (1). The refrigerant supplementing and enthalpy increasing pipe (2) is inserted into a first port of the refrigerant supplementing hole (11). A second port of the refrigerant supplementing hole (11) is communicated with a compression cavity of a pump body assembly through a refrigerant supplementing hole (12). The circular ring on-off switch (3) is arranged in the refrigerant supplementing hole (11). An inner ring area of the circular ring on-off switch (3) corresponds to an outlet position of the refrigerant supplementing and enthalpy increasing pipe (2). An outer ring area of the circular ring on-off switch (3) corresponds to an inlet position of the refrigerant supplementing hole (12). The circular ring on-off switch (3) has a refrigerant supplementing state and a check state. When refrigerant pressure in the refrigerant supplementing and enthalpy increasing pipe (2) is higher than refrigerant pressure in the compression cavity, the circular ring on-off switch (3) can be expanded and deformed along a radial direction outwardly under the action of an internal-external pressure difference to switch to the refrigerant supplementing state. When the circular ring on-off switch (3) is in the refrigerant supplementing state, the inner ring area of the circular ring on-off switch (3) is communicated with the refrigerant supplementing hole (12). When refrigerant pressure in the refrigerant supplementing and enthalpy increasing pipe (2) is lower than refrigerant pressure in the compression cavity, the circular ring on-off switch (3) can be contracted and deformed along the radial direction inwardly under the action of the internal-external pressure difference to switch to the check state. When the circular ring on-off switch (3) is in the check state, the inner ring area of the circular ring on-off switch (3) is cut off from the refrigerant supplementing hole (12).

2. The increased lift check structure of claim 1, wherein, The second port of the refrigerant supplementing hole (11) is communicated with the refrigerant supplementing hole (12) through an expanded ring groove (13). The circular ring on-off switch (3) is assembled in the expanded ring groove (13). An axial height of the circular ring on-off switch (3) is greater than an axial depth of the expanded ring groove (13) so that the circular ring on-off switch (3) has a part in the second port. An outer ring diameter of the circular ring on-off switch (3) in the refrigerant supplementing state is equal to a hole diameter of the second port of the refrigerant supplementing hole (11). An outer ring diameter of the circular ring on-off switch (3) in the check state is smaller than the hole diameter of the second port of the refrigerant supplementing hole (11).

3. The increased lift check structure of claim 2, wherein, The circular ring on-off switch (3) has a slit through its inner and outer ring walls, and the parts of the circular ring on-off switch (3) corresponding to the slit are respectively a left end butt joint (31) and a right end butt joint (32). When the circular ring on-off switch (3) is in the non-return state, the left end butt joint (31) and the right end butt joint (32) are in end face opposite abutment. When the circular ring on-off switch (3) is in the air supplementing state, the left end butt joint (31) and the right end butt joint (32) are away from each other and form a flow passage (30) at the away area. The outer diameter of the flared ring groove (13) is greater than the diameter of the second port. When the circular ring on-off switch (3) is in the air supplementing state, the air supplementing hole (12) is on the groove bottom wall of the flared ring groove (13) in the outer ring area of the circular ring on-off switch (3).

4. The increased lift check structure of claim 3, wherein, The air supplementing hole (12) has a plurality of air supplementing holes (12) uniformly spaced around the central axis of the flared ring groove (13).

5. The increased lift check structure of claim 3, wherein, The slit is a straight slit extending along the diameter direction of the circular ring on-off switch (3).

6. The increased lift check structure of claim 3, wherein, The projection of the slit on any radial plane of the circular ring on-off switch (3) is in the shape of Z.

7. The increased lift check structure of claim 6, wherein, The left end butt joint (31) has a radial outer side arc arm, and the right end butt joint (32) has a radial inner side arc arm. The radial outer side arc arm and the radial inner side arc arm both have the flow passage (30) penetrating in the radial direction of the circular ring on-off switch (3). When the circular ring on-off switch (3) is in the air supplementing state, the flow passage (30) on the radial inner side arc arm and the flow passage (30) on the radial outer side arc arm at least partially communicate in the radial direction of the circular ring on-off switch (3). The radial outer side arc arm has a first sealing head (311) on the side of the flow passage (30) close to the right end butt joint (32), and the radial inner side arc arm has a second sealing head (321) on the side of the flow passage (30) close to the left end butt joint (31). When the circular ring on-off switch (3) is in the non-return state, the first sealing head (311) can block the flow passage (30) on the right end butt joint (32), and the second sealing head (321) can block the flow passage (30) on the left end butt joint (31).

8. The increased lift check structure of claim 3, wherein, Opposite end faces of the left end butt joint (31) and the right end butt joint (32) are formed with accommodation grooves, and an elastic stretching piece (33) is arranged between the two accommodation grooves.

9. A scroll compressor characterized by, The assembly carrier (1) is a static scroll of the scroll compressor.

10. The scroll compressor of claim 9, wherein, Also include the shell upper cover, the air supplementing and enthalpy increasing pipe (2) is away from the static vortex disc one end first end, close to the static vortex disc one end second end, the first end is welded with the shell upper cover, the second end gap is inserted in the first port of the air supplementing through hole (11) and the air supplementing and enthalpy increasing pipe (2) and the air supplementing through hole (11) still be equipped with sealing ring (100).

11. An air conditioner characterized by comprising: The scroll compressor comprises the air supplementing and enthalpy increasing pipe according to claim 9 or 10.

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