Pump body structure, compressor and air conditioner

Abstract

The invention discloses a pump body structure, a compressor and an air conditioner, the pump body structure comprises a fixed scroll plate, a movable scroll plate, a support assembly and a supporting assembly, the fixed scroll plate, the movable scroll plate and the support assembly define a back pressure cavity, and the supporting assembly is inserted into the support assembly and can move up and down under the action of the movable scroll plate; a first gas channel is formed in the support assembly, a second gas channel is formed in the supporting assembly, the communicating area of the first gas channel and the second gas channel can be adjusted by moving the supporting assembly up and down, and then the amount of gas flowing into the backpressure cavity through the first gas channel or the second gas channel is adjusted. The current working condition of the compressor is associated with the communication area of the first gas channel and the second gas channel, and the gas inflow of the back pressure cavity is adjusted according to the operation condition of the movable scroll plate, so that the pressure of the back pressure cavity is balanced with the gas force borne by the movable scroll plate, radial leakage or overlarge friction work is avoided, noise and compressor power consumption are reduced, and the service life of the compressor is prolonged. The energy efficiency ratio is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioners and relates to a pump body structure, a compressor and an air conditioner. Background Art

[0002] The scroll compressor forms a compression chamber by meshing the orbiting scroll and the fixed scroll. The orbiting scroll revolves around the fixed scroll to compress the refrigerant in the compression chamber, thereby compressing the low-temperature and low-pressure gas in the suction chamber into high-temperature and high-pressure gas. When the scroll compresses the gas, it will be subject to the reaction force of the gas, which will cause the orbiting scroll to overturn and cause radial leakage in the compression chamber. Repeated compression of the refrigerant will cause waste of compression work and reduce the energy efficiency of the compressor.

[0003] In order to balance the gas force on the movable scroll, it is a common technical solution to set a back pressure chamber between the movable scroll and the bracket. For example, a throttle valve is set on the bracket to connect the exhaust chamber and the back pressure chamber, and the throttle valve is controlled by the pressure difference between the back pressure chamber and the exhaust chamber to adjust the pressure of the back pressure chamber; for another example, the exhaust port and the inlet of the back pressure chamber are connected, and the exhaust gas from the exhaust port is conducted to the back pressure inlet to provide back pressure. However, in both of these methods, the back pressure chamber is connected to the exhaust chamber. In the low pressure ratio over-compression condition or the high pressure difference under-compression condition, the friction power consumption may increase due to excessive back pressure, that is, the back pressure cannot match the suction and exhaust pressure of the system condition, resulting in leakage in the compression process and increased power consumption. Summary of the invention

[0004] In view of this, the present invention provides a pump body structure, a compressor and an air conditioner, which solve the technical problem that the back pressure of the traditional pump body structure cannot match the suction and exhaust pressure of the system working condition, thereby causing leakage in the compression process.

[0005] In order to solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides a pump body structure, which includes a fixed scroll, a movable scroll, a bracket assembly and a support assembly. The fixed scroll, the movable scroll and the bracket assembly form a back pressure chamber. The support assembly is inserted into the bracket assembly and can move up and down under the action of the movable scroll. A first gas channel is opened on the bracket assembly, and a second gas channel is opened on the support assembly. The up and down movement of the support assembly can adjust the connecting area between the first gas channel and the second gas channel, thereby adjusting the amount of gas flowing into the back pressure chamber through the first gas channel or the second gas channel.

[0006] In some embodiments, the support assembly includes a support body and a plurality of support feet arranged below the support body; a groove corresponding to the support feet is opened on the bracket assembly, and the support feet are inserted into the groove and can move up and down along the groove under the action of the movable scroll plate.

[0007] In some embodiments, the pump body structure further includes an elastic member, wherein the elastic member is located at the bottom of the sink, and the bottom of the supporting foot is in contact with the elastic member.

[0008] In some embodiments, a flow groove is axially provided on a side surface of the support assembly, and high-pressure gas can flow through the flow groove to the first gas channel.

[0009] In some embodiments, the first gas channel includes an air inlet channel, an input end of the air inlet channel is located on the outer surface of the support assembly and communicates with the through-flow groove, and an output end of the air inlet channel extends radially toward the second gas channel.

[0010] In some embodiments, the second gas channel includes an air inlet groove and a flow hole, the air inlet groove is opened on the outer surface of the supporting foot and extends into the supporting foot, one end of the flow hole is connected to the air inlet groove, and the other end of the flow hole is connected to the back pressure chamber.

[0011] In some embodiments, the distance between the lower end surface of the support body and the top of the bracket assembly is smaller than the axial height of the air inlet groove.

[0012] In some embodiments, a lubricating oil channel is provided on the support assembly, one end of the lubricating oil channel is connected to the air inlet groove, and the other end of the lubricating oil channel extends to the mating surface between the support foot and the sink groove; the gas flowing out through the air inlet groove can enter the back pressure chamber along the flow hole, and the lubricating oil flowing out through the air inlet groove can flow along the lubricating oil channel to the mating surface between the support foot and the sink groove.

[0013] In some embodiments, the lubricating oil channel includes a first oil groove and a second oil groove, the first oil groove includes a plurality of full-circle grooves opened along the circumference of the supporting foot, and the plurality of full-circle grooves are evenly distributed axially on the outer surface of the supporting foot; the second oil groove is opened along the axial direction of the supporting foot; the second oil groove is connected to the air intake groove, and each of the full-circle grooves is connected to the second oil groove.

[0014] In some embodiments, a first pressure channel extends from the bottom of the sink, a second pressure channel is provided in the elastic member, and the first pressure channel is connected to the second pressure channel.

[0015] In some embodiments, the first gas channel includes an airflow channel, the input end of the airflow channel is located on the outer surface of the bracket assembly and is connected to the flow groove, and the airflow channel extends radially and passes through the second gas channel, and its output end faces the oil pool; wherein the oil pool is connected to the back pressure chamber.

[0016] In some embodiments, the second gas channel includes a throttling groove, which is opened on the outer surface of the supporting foot; under the action of the orbiting scroll, the throttling groove can be connected to the air flow channel.

[0017] According to another aspect of the present application, an embodiment of the present invention provides a compressor, which includes the above-mentioned pump body structure.

[0018] According to another aspect of the present application, an embodiment of the present invention provides an air conditioner, comprising the above-mentioned compressor.

[0019] Compared with the prior art, the pump body structure of the present invention has at least the following beneficial effects:

[0020] The pump body structure provided by the present invention includes a fixed scroll, a movable scroll, a bracket assembly and a support assembly, the fixed scroll, the movable scroll and the bracket assembly form a back pressure chamber, the support assembly is inserted into the bracket assembly and can move up and down under the action of the movable scroll, a first gas channel is opened on the bracket assembly, and a second gas channel is opened on the support assembly, and the up and down movement of the support assembly can adjust the connecting area between the first gas channel and the second gas channel, thereby adjusting the amount of gas flowing into the back pressure chamber through the first gas channel or the second gas channel.

[0021] When the movable scroll is overturned by the reaction force of the gas, it can push the support assembly below to move up and down along the support assembly. In the initial stage, the support assembly and the movable scroll are relatively still. At this time, the first gas channel on the support assembly and the second gas channel on the support assembly are not connected, and the gas cannot enter the back pressure chamber through the first gas channel and the second gas channel. When the movable scroll begins to overturn, the support assembly will move downward. At this time, the first gas channel and the second gas channel will be partially connected. As the overturning movement becomes more intense, the support assembly will produce a larger downward displacement. At this time, the first gas channel and the second gas channel have the largest connecting area, and more high-pressure gas will enter the back pressure chamber through the first gas channel and the second gas channel. That is to say, the connecting area between the first gas channel and the second gas channel depends on the distance that the support assembly moves downward, and the distance that the support assembly moves downward depends on the intensity of the tilting movement of the movable scroll, and the intensity of the tilting movement of the movable scroll depends on the current operating condition of the compressor; therefore, this embodiment associates the current operating condition of the compressor with the connecting area between the first gas channel and the second gas channel, and the high-pressure gas enters the back pressure chamber through the connecting area. Therefore, the pump body structure provided in this embodiment can adjust the air intake volume of the back pressure chamber according to the operating condition of the movable scroll, so that the back pressure chamber pressure is balanced with the gas force on the movable scroll, avoiding radial leakage or excessive friction work, reducing noise and compressor power consumption, and improving energy efficiency.

[0022] The compressor provided by the present invention is designed based on the above-mentioned pump body structure. Its beneficial effects refer to the beneficial effects of the above-mentioned pump body structure, which will not be described in detail here.

[0023] The air conditioner provided by the present invention is designed based on the above compressor. Its beneficial effects refer to the beneficial effects of the above compressor, which will not be described in detail here.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0026] Figure 1 is a cross-sectional view of a pump body structure provided by an embodiment of the present invention;

[0027] Figure 2 is a cross-sectional view of a movable scroll and a support assembly in a pump body structure provided by an embodiment of the present invention when they are in a balanced state;

[0028] Figure 3 is a cross-sectional view of a movable scroll in a pump body structure provided by an embodiment of the present invention when the movable scroll is in an overturned state;

[0029] Figure 4 is a structural schematic diagram of a bracket assembly in a pump body structure provided by an embodiment of the present invention;

[0030] Figure 5 is a structural schematic diagram of an elastic member in a pump body structure provided by an embodiment of the present invention;

[0031] Figure 6 is a structural schematic diagram of a support assembly in a pump body structure provided by an embodiment of the present invention;

[0032] Figure 7 yes Figure 6 A partial enlarged view of the middle A;

[0033] Figure 8 is a structural schematic diagram of another angle of a support assembly in a pump body structure provided by an embodiment of the present invention;

[0034] Fig. 9 is a cross-sectional view of a support assembly in a pump body structure provided by an embodiment of the present invention;

[0035] Fig.10 is another structural schematic diagram of a support assembly in a pump body structure provided by an embodiment of the present invention;

[0036] Fig.11 is another cross-sectional view of a support assembly in a pump body structure provided by an embodiment of the present invention;

[0037] Fig.12 is another cross-sectional view of a pump body structure provided by an embodiment of the present invention;

[0038] Fig.13 It is another cross-sectional view of a pump body structure provided by an embodiment of the present invention when the orbiting scroll and the supporting assembly are in a balanced state.

[0039] in:

[0040] 1. Fixed scroll; 2. Orbital scroll; 3. Support assembly; 31. First gas channel; 32. Sink; 33. Flow groove; 34. First pressure channel; 4. Support assembly; 41. Second gas channel; 42. Support body; 43. Support foot; 44. Lubricating oil channel; 411. Inlet groove; 412. Flow hole; 441. First oil groove; 442. Second oil groove; 5. Back pressure chamber; 6. Elastic member; 61. Second pressure channel; 7. Crankshaft. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0042] In the description of the present invention, it should be clarified that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, but are not necessarily used to describe a specific order or sequence; the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, and do not mean that the referred device or element must have a specific direction or position, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Example 1

[0045] This embodiment provides a pump structure, such as Figure 1-13As shown, the pump body structure includes a fixed scroll 1, a movable scroll 2, a bracket assembly 3 and a support assembly 4, the fixed scroll 1, the movable scroll 2 and the bracket assembly 3 form a back pressure chamber 5, the support assembly 4 is inserted into the bracket assembly 3 and can move up and down under the action of the movable scroll 2, the bracket assembly 3 is provided with a first gas channel 31, and the support assembly 4 is provided with a second gas channel 41, and the up and down movement of the support assembly 4 can adjust the connecting area between the first gas channel 31 and the second gas channel 41, thereby adjusting the amount of gas flowing into the back pressure chamber 5 through the first gas channel 31 or the second gas channel 41.

[0046] Specifically, the fixed scroll 1 and the movable scroll 2 mesh to form a compression chamber, and the movable scroll 2 revolves around the fixed scroll 1 to compress the refrigerant in the compression chamber, thereby compressing the low-temperature and low-pressure gas in the suction chamber into high-temperature and high-pressure gas. When the scroll compresses the gas, it will be subjected to the reaction force of the gas. A back pressure chamber 5 is set between the fixed scroll 1, the movable scroll 2 and the bracket assembly 3, and a certain back pressure is provided in the back pressure chamber 5 to balance the gas force on the movable scroll 2. The compressor has a variety of different working conditions, and under different working conditions, the amount of gas required by the back pressure chamber 5 is different.

[0047] In view of this, the support assembly 3 in this embodiment is provided with a first gas channel 31, and the support assembly 4 is provided with a second gas channel 41. The support assembly 4 moves up and down to adjust the connection area between the first gas channel 31 and the second gas channel 41, thereby adjusting the amount of gas flowing into the back pressure chamber 5 through the first gas channel 31 or the second gas channel 41. That is to say, when the movable scroll 2 is overturned by the reaction force of the gas, it can push the support assembly 4 below to move up and down along the support assembly 3. In the initial stage, the support assembly 3 and the movable scroll 2 are relatively still. At this time, the first gas channel 31 on the support assembly 3 and the second gas channel 41 on the support assembly 4 are not connected, and the gas cannot enter the back pressure chamber through the first gas channel 31 and the second gas channel 41. When the movable scroll 2 begins to overturn, the support assembly 4 will move downward. At this time, the first gas channel 31 and the second gas channel 41 will be partially connected. As the overturning motion becomes more violent, the support assembly 4 will produce a larger downward displacement. At this time, the first gas channel 31 and the second gas channel 41 have the largest connecting area, and more high-pressure gas will enter the back pressure chamber 5 through the first gas channel 31 and the second gas channel 41.

[0048] That is to say, the connecting area between the first gas channel 31 and the second gas channel 41 depends on the distance that the support assembly 4 moves downward, and the distance that the support assembly 4 moves downward depends on the intensity of the tilting movement of the movable scroll 2, and the intensity of the tilting movement of the movable scroll 2 depends on the current working condition of the compressor; therefore, this embodiment associates the current working condition of the compressor with the connecting area between the first gas channel 31 and the second gas channel 41, and the high-pressure gas enters the back pressure chamber through the connecting area. Therefore, the pump body structure provided in this embodiment can adjust the air intake of the back pressure chamber according to the operating condition of the movable scroll 2, so that the back pressure chamber pressure is balanced with the gas force exerted on the movable scroll 2, avoiding radial leakage or excessive friction work, reducing noise and compressor power consumption, and improving energy efficiency.

[0049] In a specific embodiment, the support assembly 4 includes a support body 42 and a plurality of support feet 43 arranged below the support body 42; a sinking groove 32 corresponding to the support feet 43 is opened on the bracket assembly 3, and the support feet 43 are inserted into the sinking groove 32 and can move up and down along the sinking groove 32 under the action of the movable scroll plate 2.

[0050] The general outline of the support body 42 is a circular ring structure, and the support foot 43 is extended downward from the lower surface of the circular ring structure. There are multiple support feet 43. For example, in one embodiment, there are four support feet 43, and the four support feet 43 are evenly distributed along the circumferential direction, that is, there is an angle of 90° between adjacent support feet 43. The bracket assembly 3 includes a bracket body, and the general outline of the bracket body is cylindrical. Inside the cylindrical body, there is a downwardly concave mounting surface, and there is a matching hole in the middle of the mounting surface. The matching hole is used to match the crankshaft 7 of the compressor. The sink groove 32 is opened on the mounting surface. In order to match the above-mentioned support foot 43, in one embodiment, four sink grooves 32 are also provided. In this way, the support foot 43 is inserted into the corresponding sink groove 32. When the movable scroll plate 2 has an overturning motion, it acts on the support body 42, so that the support foot 43 below the support body 42 moves up and down in the sink groove 32.

[0051] This embodiment realizes the movement of the support assembly 4 through the cooperation of the support foot 43 and the sink groove 32, adjusts the connection area between the first gas channel 31 and the second gas channel 41, and further controls the amount of gas entering the back pressure chamber 5 so that the gas amount matches the current working conditions.

[0052] In a specific embodiment, the pump body structure further includes an elastic member 6, which is located at the bottom of the sink 32, and the bottom of the support foot 43 is in contact with the elastic member 6. When the support foot 43 moves downward due to the overturning motion of the movable scroll 2, it compresses the elastic member 6. In this process, the elastic member 6 can alleviate the impact of the movable scroll 2 on the support assembly 4, and can also generate a reaction force on the support assembly 4. When the overturning motion of the movable scroll 2 disappears, the support foot 43 will return to the initial position under the action of the restoring force of the elastic member 6.

[0053] In a specific embodiment, a flow groove 33 is provided in the axial direction on the side of the support assembly 3, and the high-pressure gas can flow to the first gas channel 31 through the flow groove 33. The support assembly 3 includes a support body, and the general outline of the support body is cylindrical. For better explanation, it is assumed that the cylindrical shape includes a first cylinder located at the top and a second cylinder located at the bottom. Of course, in fact, the support body is an integrated structure and is not divided into upper and lower parts. On the outer surface of the first cylinder, a plurality of flow grooves 33 are provided at intervals along the axial direction, and the number of the flow grooves 33 is the same as that of the support feet 43 and corresponds one to one; outside the second cylinder, below each flow groove 33, there is a groove with a larger area, and the input end of the first gas channel 31 is located at the groove. In this embodiment, the high-pressure gas first enters the flow groove 33 and then is transmitted through the first gas channel 31.

[0054] In a specific implementation process, the first gas channel 31 and the second gas channel 41 have a variety of different structures, two of which are described in detail below:

[0055] The first one:

[0056] In a specific embodiment, Figure 6-Figure 10 As shown, the first gas channel 31 includes an inlet channel, the input end of which is located on the outer surface of the support assembly 3 and communicated with the through-flow groove 33, and the output end of the inlet channel is directed toward the second gas channel 41 after the inlet channel extends radially. That is, the input end of the inlet channel is provided on the groove on the outer surface of the second cylinder, and the output end of the inlet channel extends to the second gas channel 41 through the rear edge of the side wall of the second cylinder. Under the action of the orbiting scroll 2, the inlet channel has a first state in communication with the second gas channel 41 and a second state separated from the second gas channel 41.

[0057] In a specific embodiment, the second gas channel 41 includes an air inlet groove 411 and a flow hole 412. The air inlet groove 411 is provided on the outer surface of the support foot 43 and extends into the support foot 43. One end of the flow hole 412 is connected to the air inlet groove 411, and the other end of the flow hole 412 is connected to the back pressure chamber 5. The air inlet groove 411 needs to be connected to the air inlet channel on the one hand, and needs to be connected to the flow hole 412 on the other hand. The flow hole 412 is provided inside the support foot 43, so the air inlet groove 411 is provided inside the support foot 43, but extends to the outer surface of the support foot 43; and in order to realize the transmission of high-pressure gas to the back pressure chamber 5, the flow hole 412 includes a vertical hole and a transverse hole, one end of the vertical hole is connected to the air inlet groove 411, the other end of the vertical hole is connected to one end of the transverse hole, and the other end of the transverse hole is connected to the back pressure chamber 5. In this way, when the support assembly 4 moves downward due to the tilting movement of the movable scroll plate 2, the notch of the air inlet groove 411 can just be connected to the air inlet channel, so that the high-pressure gas is transmitted to the back pressure chamber 5 through the air inlet channel, the air inlet groove 411, the vertical hole and the transverse hole in sequence.

[0058] In a specific embodiment, a lubricating oil channel 44 is further provided on the support assembly 4, one end of the lubricating oil channel 44 is connected to the air inlet groove 411, and the other end of the lubricating oil channel 44 extends to the mating surface of the support foot 43 and the sink 32; the gas flowing out through the air inlet groove 411 can enter the back pressure chamber 5 along the flow hole 412, and the lubricating oil flowing out through the air inlet groove 411 can flow along the lubricating oil channel 44 to the mating surface of the support foot 43 and the sink 32. During the operation of the pump body structure, the high-pressure gas may be mixed with lubricating oil. In this embodiment, the lubricating oil in the high-pressure gas can be separated for use through the lubricating oil channel 44. Specifically, the high-pressure gas mixed with lubricating oil enters the air intake channel after passing through the flow groove 33, and then flows into the air intake groove 411. At the air intake groove 411, the lubricating oil can flow along the lubricating oil channel 44 to the mating surface of the supporting foot 43 and the sink groove 32 to lubricate and seal the mating surface, and the high-pressure gas can enter the back pressure chamber 5 along the flow hole 412.

[0059] In a specific embodiment, the lubricating oil channel 44 includes a first oil groove 441 and a second oil groove 442. The first oil groove 441 includes a plurality of full-circle grooves opened along the circumference of the support foot 43, and the plurality of full-circle grooves are evenly distributed on the outer surface of the support foot 43 along the axial direction. The second oil groove 442 is opened along the axial direction of the support foot 43. The second oil groove 442 is connected to the air inlet groove 411, and each of the full-circle grooves is connected to the second oil groove 442. In order to make the flow of lubricating oil smoother and enable the lubricating oil to lubricate the entire mating surface of the support foot 43 and the sink 32, the lubricating oil channel 44 includes a first oil groove 441 and a second oil groove 442. The lubricating oil channel 44 includes the first oil groove 441 and the second oil groove 442, which are arranged along different directions. Specifically, the first oil groove 441 is arranged along the circumference, and the second oil groove 442 is arranged along the axial direction. In this way, the lubricating oil first flows to the circumferentially arranged first oil groove 441 in the air inlet groove 411 , and then flows upward along the axially arranged second oil groove 442 to separate the lubricating oil in the high-pressure gas, providing lubrication and sealing for the mating surfaces of the support foot 43 and the sink groove 32 .

[0060] In a specific embodiment, a first pressure channel 34 extends from the bottom of the sink 32 , a second pressure channel 61 is defined in the elastic member 6 , and the first pressure channel 34 and the second pressure channel 61 are connected.

[0061] When the orbiting scroll 2 is running smoothly, the support assembly 4 has no contact with the orbiting scroll 2. At this time, the balance equation of the support assembly 4 is m 3 g=n(kx+p 0 S 4 -p 1 S 3 ), where m 3 is the mass of the support assembly 4, n is the number of support legs 43, k is the equivalent stiffness of the elastic member 6, x is the downward displacement of the support assembly 4, and p 0 is the pressure of the high pressure chamber of the shell, S 4 is the cross-sectional area of ​​the first pressure channel 34, p 1 is the pressure of the back pressure chamber 5, S 3 is the cross-sectional area of ​​the supporting foot 43.

[0062] In the specific use process, the parameters can be selected according to the balance equation to keep a suitable distance between the support assembly 4 and the movable scroll 2. If the distance is too small, it will cause additional friction work, and if the distance is too large, the back pressure regulation ability of this structure will be weakened. The pressure channel formed by the first pressure channel 34 and the second pressure channel 61 provides the support assembly 4 with a supporting force p that changes with the working conditions. 0 S 4, so that the balance displacement x of the support assembly 4 under different working conditions changes less. When the back pressure is not enough to balance the gas force, the movable scroll 2 will overturn and contact the support assembly 4 to make it move downward, the air inlet groove 411 on the support foot 43 will be connected with the air inlet channel, and the gas in the high-pressure chamber of the shell will enter the back pressure chamber 5, and the pressure of the back pressure chamber 5 will increase. The greater the overturning of the movable scroll 2, the more the support assembly will move downward, the larger the area of ​​the air inlet groove 411 connected with the air inlet channel, and the faster the pressure of the back pressure chamber 5 will increase.

[0063] In addition, in one embodiment, if Fig.13 As shown, the distance d1 between the lower end surface of the support body 42 and the top of the support assembly 3 is less than the axial height d2 of the air inlet groove, so as to ensure that the air inlet groove 411 is connected with the air inlet channel when the support assembly 4 moves downward, and at the same time, a mandatory constraint is added to the overturning movement of the movable scroll 2 to prevent excessive overturning. When the back pressure is sufficient to balance the gas force, the movable scroll 2 resumes stable operation, the support assembly moves upward under the force of the elastic member 6 and the gas force of the high-pressure chamber, the airflow channel on the support assembly 3 and the support foot is disconnected, so that the back pressure chamber 5 is isolated from the high-pressure chamber of the shell to prevent the back pressure from being too high.

[0064] Second type:

[0065] In a specific embodiment, Fig.11 and Fig.12 As shown, the first gas channel 31 includes an airflow channel, the input end of which is located on the outer surface of the support assembly 3 and communicated with the through-flow groove 33, and the airflow channel extends radially and passes through the second gas channel 41, and its output end faces the oil pool; wherein, the oil pool is communicated with the back pressure chamber 5. The second gas channel 41 includes a throttle groove, which is opened on the outer surface of the support foot 43; under the action of the movable scroll 2, the throttle groove can be communicated with the airflow channel.

[0066] Specifically, the throttling groove is a multi-circle groove opened on the outside of the supporting foot 43. In the initial state, that is, when the movable scroll 2 and the supporting assembly 4 are balanced, the supporting foot 43 cooperates with the air flow channel. At this time, the two are tightly matched with no gap between them; when the movable scroll 2 overturns, it pushes the supporting assembly 4 to move downward. At this time, the throttling groove outside the supporting foot 43 just cooperates with the air flow channel. If the throttling groove is a groove, a gap will be generated between the supporting foot 43 and the air flow channel, and the high-pressure gas can be transmitted through the gap.

[0067] In this embodiment, both the first gas channel 31 and the second gas channel 41 are not directly connected to the back pressure chamber 5, but are connected through the oil pool. Because the oil pool can also be connected to the back pressure chamber 5 during the operation of the pump body structure, this embodiment uses the characteristics of the oil pool to achieve the transmission of high-pressure gas. The transmission of high-pressure gas in this way makes the pressure of the back pressure chamber change slowly, which can prevent airflow impact.

[0068] Example 2

[0069] This embodiment provides a compressor, which includes the pump body structure described in Embodiment 1.

[0070] After adopting the pump body structure in Example 1, no matter what operating conditions the compressor is operating in or how the pressure changes, different adaptive back pressures can be generated through the pump body structure in Example 1, and the back pressure can be maintained within an appropriate range, thereby reducing the power consumption of the compressor and meeting the requirements for smooth operation of the pump body, allowing the compressor to operate stably under various conditions and working conditions, thereby improving the compression efficiency and volumetric efficiency of the compressor.

[0071] Example 3

[0072] This embodiment provides an air conditioner, which includes the compressor described in Embodiment 2.

[0073] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous technical features can be freely combined and superimposed.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pump body structure, characterized in that: The pump body structure includes a fixed scroll, a movable scroll, a bracket assembly and a support assembly, the fixed scroll, the movable scroll and the bracket assembly form a back pressure chamber, the support assembly is inserted into the bracket assembly and can move up and down under the action of the movable scroll, a first gas channel is opened on the bracket assembly, and a second gas channel is opened on the support assembly, and the up and down movement of the support assembly can adjust the connection area between the first gas channel and the second gas channel, thereby adjusting the amount of gas flowing into the back pressure chamber through the first gas channel or the second gas channel.

2. The pump body structure according to claim 1, characterized in that: The support assembly includes a support body and a plurality of support legs arranged below the support body; the bracket assembly is provided with sink grooves corresponding to the support legs one by one, the support legs are inserted into the sink grooves and can move up and down along the sink grooves under the action of the movable scroll.

3. The pump body structure according to claim 2, characterized in that: The pump body structure also includes an elastic member, which is located at the bottom of the sink, and the bottom of the supporting foot is in contact with the elastic member.

4. The pump structure according to claim 2, characterized in that: A flow groove is provided on the side surface of the support assembly along the axial direction, and high-pressure gas can flow to the first gas channel through the flow groove.

5. The pump structure according to claim 4, characterized in that: The first gas channel comprises an inlet channel, the input end of the inlet channel is located on the outer surface of the support assembly and communicates with the through-flow groove, and the output end of the inlet channel extends radially toward the second gas channel.

6. The pump structure according to claim 5, characterized in that: The second gas channel includes an air inlet groove and a flow hole. The air inlet groove is opened on the outer surface of the supporting foot and extends into the supporting foot. One end of the flow hole is connected to the air inlet groove, and the other end of the flow hole is connected to the back pressure chamber.

7. The pump structure according to claim 5, characterized in that: The distance between the lower end surface of the support body and the top of the bracket assembly is smaller than the axial height of the air inlet groove.

8. The pump structure according to claim 7, characterized in that: A lubricating oil channel is provided on the support assembly, one end of the lubricating oil channel is communicated with the air inlet groove, and the other end of the lubricating oil channel extends to the mating surface between the support foot and the sink groove; The gas flowing out through the air inlet groove can enter the back pressure cavity along the flow hole, and the lubricating oil flowing out through the air inlet groove can flow along the lubricating oil channel to the matching surface of the supporting foot and the sink groove.

9. The pump structure according to claim 8, characterized in that: The lubricating oil channel includes a first oil groove and a second oil groove, the first oil groove includes a plurality of full-circle grooves opened along the circumference of the supporting foot, and the plurality of full-circle grooves are evenly distributed axially on the outer surface of the supporting foot; the second oil groove is opened along the axial direction of the supporting foot; the second oil groove is connected to the air intake groove, and each of the full-circle grooves is connected to the second oil groove.

10. The pump structure according to claim 3, characterized in that: A first pressure channel extends from the bottom of the sink, a second pressure channel is provided in the elastic member, and the first pressure channel is communicated with the second pressure channel.

11. The pump structure according to any one of claims 4 to 9, characterized in that: The first gas channel includes an airflow channel, the input end of which is located on the outer surface of the bracket assembly and is connected to the flow groove, and the airflow channel extends radially and passes through the second gas channel, and its output end faces the oil pool; wherein the oil pool is connected to the back pressure chamber.

12. The pump structure according to claim 11, characterized in that: The second gas channel includes a throttling groove, which is opened on the outer surface of the supporting foot; under the action of the movable scroll plate, the throttling groove can be connected with the gas flow channel.

13. A compressor, characterized in that: The compressor comprises the pump body structure according to any one of claims 1-12.

14. An air conditioner, characterized in that: The air conditioner includes the compressor according to claim 13.

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