Scroll compression mechanism and scroll compressor

Abstract

The present invention relates to a scroll compression mechanism and a scroll compressor having the same. The compression mechanism includes: a fixed scroll component and a movable scroll component and an oil supply channel for supplying lubricating oil from a lubricating oil source to the scroll compression mechanism. The compression mechanism also includes a regulating valve and a fluid pressure channel. The regulating valve includes a movable valve body. The first end of the fluid pressure channel is fluidly connected to a first pressure source to apply a first pressure to a first side end of the movable valve body. The second end of the fluid pressure channel is fluidly connected to a second pressure source to apply a second pressure to a second side end of the movable valve body, so that the movable valve body can selectively move toward a first direction or an opposite second direction to reduce or increase the flow cross-sectional area of ​​the oil supply channel based on a pressure difference. The scroll compression mechanism of the present invention and the scroll compressor having the same can dynamically adjust the oil supply amount and the oil circulation rate according to the working conditions, while ensuring the working reliability of the compressor and the working performance of the system to which the compressor is applied.

Description

Technical Field

[0001] The present invention relates to a scroll compressor, and more particularly to a scroll compressor having improvements in the dynamic adjustment of oil quantity of a scroll compression mechanism. Background Art

[0002] Compressors (such as scroll compressors) are used in refrigeration (freezing or refrigeration) systems, air conditioning systems and heat pump systems. The scroll compressor includes a compression mechanism for compressing a working fluid (such as a refrigerant), and the compression mechanism further includes a movable scroll component and a fixed scroll component. When the scroll compressor is in operation, there is a relative movement between the movable scroll component and the fixed scroll component of the compression mechanism. In order to reduce wear and reduce power consumption, it is necessary to provide lubrication (such as supplying lubricating oil) to the compression mechanism to improve the friction between the movable scroll component and the fixed scroll component. At the same time, the oil film generated also improves the sealing of the compression mechanism, thereby improving the volumetric efficiency, etc.

[0003] Generally, the oil circulation rate is used to characterize the amount of lubricating oil carried by the working fluid, and the oil circulation rate is used to indicate the degree of lubricating oil supply to the compression mechanism accordingly. Excessive or insufficient supply of lubricating oil will have an adverse effect on the normal operation of the compression mechanism itself and the system performance and energy efficiency. An excessively large oil circulation rate will reduce the heat exchange efficiency of the system, and will also cause the lubricating oil to accumulate around the discharge valve assembly (such as the HVE valve assembly) at the discharge port and the discharge recess of the fixed scroll component (especially above the discharge valve assembly), which will cause certain problems for the scroll compressor (such as the operating stability of the discharge valve assembly and / or the exhaust reliability of the compression mechanism).

[0004] The prior art provides a compression mechanism oil supply structure that can keep the oil circulation rate within an appropriate range under different compressor speeds and / or different system operating parameters. However, the prior art oil supply structure cannot adjust the oil injection amount or oil circulation rate according to the changes in the working conditions to meet the requirements of compressor performance energy efficiency or stability and reliability under different working conditions. For example, under rated load or light load conditions, excessive oil injection leads to excessive oil circulation rate, thereby reducing the heat exchange efficiency of the system and causing emission stability and reliability problems caused by lubricating oil accumulation. Under severe working conditions such as high load (such as high speed) or high temperature, too little oil injection leads to insufficient lubrication of the compression mechanism, thereby increasing wear and reducing power consumption, thereby reducing the stability and reliability of the compressor operation.

[0005] Therefore, there is a need for a compressor oil supply structure that can dynamically adjust the injection amount according to the working conditions.

[0006] Here, it should be pointed out that the technical contents provided in this section are intended to help those skilled in the art to understand the present invention, but do not necessarily constitute prior art. Summary of the invention

[0007]

[0013] This section provides a general summary of the invention, and is not a comprehensive disclosure of its full scope or all of its features.

[0008] An object of the present invention is to provide a scroll compression mechanism capable of dynamically adjusting the injection amount according to the working conditions.

[0009] In order to achieve the above-mentioned purpose, the present invention provides a scroll compression mechanism, comprising: a fixed scroll component and a movable scroll component including a movable scroll end plate, the movable scroll component and the fixed scroll component cooperate with each other to define a series of working fluid chambers including a central compression chamber and a fluid suction chamber; and an oil supply channel, the oil supply channel is used to supply lubricating oil from a lubricating oil source to the scroll compression mechanism, the scroll compression mechanism also includes: a regulating valve, the regulating valve includes a movable valve body; and a fluid pressure channel, the fluid pressure channel includes a first end and a second end, wherein the first end is fluidly connected to a first pressure source to apply a first pressure to a first side end of the movable valve body, and the second end is fluidly connected to a second pressure source to apply a second pressure to a second side end of the movable valve body, so that the movable valve body can selectively move toward a first direction that reduces the flow cross-sectional area of ​​the oil supply channel and toward a second direction opposite to the first direction that increases the flow cross-sectional area of ​​the oil supply channel based on the pressure difference between the first pressure and the second pressure, thereby adjusting the oil supply amount to the scroll compression mechanism.

[0010] Advantageously, the oil supply passage, the regulating valve and the fluid pressure passage are arranged in the movable scroll end plate.

[0011] Advantageously, the oil supply passage comprises a vertical oil supply hole substantially parallel to the central axis of the scroll compression mechanism, the vertical oil supply hole leads to the fluid suction chamber, and the movable valve body is partially disposed in the vertical oil supply hole, thereby adjusting the flow cross-sectional area of ​​the oil supply passage by adjusting the flow cross-sectional area of ​​the vertical oil supply hole.

[0012] Advantageously, the oil supply passage further comprises a transverse oil supply hole substantially perpendicular to the central axis, and the transverse oil supply hole intersects and communicates with the vertical oil supply hole.

[0013] Advantageously, the fluid pressure channel comprises a transverse fluid pressure hole substantially perpendicular to the central axis, and the transverse fluid pressure hole and the transverse oil supply hole are arranged horizontally or vertically in the movable scroll end plate.

[0014] Advantageously, the transverse fluid pressure channel and the vertical oil supply channel partially overlap in a vertical direction parallel to the central axis. When the transverse fluid pressure channel and the transverse oil supply channel are arranged horizontally, the transverse oil supply channel includes a main transverse oil supply channel arranged side by side with the transverse fluid pressure channel, and the transverse oil supply channel also includes a secondary transverse oil supply channel intersecting and communicating with both the main transverse oil supply channel and the vertical oil supply channel. When the transverse fluid pressure channel and the transverse oil supply channel are arranged vertically, the transverse oil supply channel and the transverse fluid pressure channel are arranged side by side.

[0015] Advantageously, the movable scroll component includes a hub, a base region in an inner space of the hub close to the movable scroll end plate serves as the lubricating oil source, and an oil inlet end of the oil supply passage is connected to the base region.

[0016] Advantageously, the first pressure changes with changes in the operating condition of the scroll compression mechanism or with changes in the working state of the system to which the scroll compression mechanism is applied, and / or the second pressure changes with changes in the operating condition of the scroll compression mechanism or with changes in the working state of the system to which the scroll compression mechanism is applied.

[0017] Advantageously, the regulating valve further comprises an elastic component arranged to abut against the second side end, and the elastic component is suitable for biasing the movable valve body toward the first direction.

[0018] Advantageously, the first pressure source is the central compression chamber; and / or the second pressure source is the fluid suction chamber or a low-pressure area located outside the scroll compression mechanism.

[0019] Advantageously, the movable valve body includes a connecting section connecting the first side end and the second side end, the diameter of the connecting section is smaller than the diameter of the first side end and smaller than the diameter of the second side end, and the regulating valve is arranged so that: when the movable valve body moves toward the first direction, the connecting section occupies less space in the oil supply passage and reduces the flow cross-sectional area of ​​the oil supply passage, and when the movable valve body moves toward the second direction, the connecting section occupies more space in the oil supply passage and increases the flow cross-sectional area of ​​the oil supply passage.

[0020] The present invention also provides a scroll compressor, which includes the scroll compression mechanism.

[0021] Thus, in the scroll compression mechanism including the oil supply structure of the present invention, compared with the compressor without the oil supply structure, under the premise of not changing the oil circulation rate of the rated working condition, the oil injection amount of the compressor under the bad working condition can be adjusted according to, for example, the pressure difference to achieve a relatively high oil circulation rate, which improves the reliability of the compressor, and compared with the traditional oil injection device without the regulating valve, the oil injection amount or the oil circulation rate can be reduced under the rated or light load working condition, which is beneficial to the energy efficiency (for example, heat exchange efficiency) of the system used by the compressor and avoids the problem of emission stability and reliability caused by the accumulation of lubricating oil, for example, at the exhaust port of the compression mechanism, and under the bad working condition of high temperature and high load, a suitable large oil injection amount or oil circulation rate can be obtained to ensure sufficient lubrication of the compression mechanism to improve the reliability of the operation of the compressor. That is, since the oil supply structure according to the present invention is provided with a regulating valve adjusted based on the pressure difference, and the pressure difference changes dynamically with the change of the working condition, the oil supply amount can be dynamically adjusted to dynamically change the oil circulation rate to match the ideal oil circulation rate under each working condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The features and advantages of one or more embodiments of the present invention will become more easily understood through the following description with reference to the accompanying drawings, in which:

[0023] Figure 1 1 is a longitudinal sectional view showing a scroll compressor having a compression mechanism with an oil supply structure according to a comparative example.

[0024] Figure 2 A longitudinal sectional view showing a movable scroll component of a compression mechanism with an oil supply structure incorporating a comparative example.

[0025] Figure 3 The figure is a longitudinal cross-sectional view showing one embodiment of a scroll compression mechanism according to the present invention.

[0026] Figure 4 FIG. 1 is a transverse cross-sectional view showing another embodiment of a scroll compression mechanism according to the present invention. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and by means of exemplary embodiments. The following detailed description of the present invention is only for illustrative purposes and is by no means limiting of the present invention and its application or use.

[0028] First, refer to Figure 1 and Figure 2 , Figure 1 A longitudinal sectional view of a scroll compressor having a compression mechanism with an oil supply structure CO according to a comparative example is schematically described. Figure 2 A longitudinal sectional view showing a movable scroll component of a compression mechanism with an oil supply structure incorporating a comparative example.

[0029] like Figure 1 As shown, the scroll compressor 100 includes a housing 110. The housing 110 includes a housing body 112 that is substantially cylindrical, a top cover 114 mounted to the top of the housing body 112, and a bottom cover 116 mounted to the bottom of the housing body 112. The housing 110 defines an internal volume IV of the scroll compressor 100. In addition, a partition 119 is also provided in the housing 110, so that the partition 119 and the top cover 114 define a high pressure area (i.e., a discharge pressure area HR, which is suitable for temporarily storing a high pressure working fluid to be discharged to the outside of the compressor), and the partition 119 and the housing body 112 and the bottom cover 116 define a low pressure area LR. In addition, the lubricant of the lubricating oil is stored in an oil pool OR at the bottom of the internal volume IV in the housing 110. In the illustrated example, the scroll compressor is a so-called low-pressure side scroll compressor.

[0030] The scroll compressor 100 further includes a suction fitting 194. In the illustrated example, the scroll compressor 100 adopts a central air intake design, that is, the suction fitting 194 is arranged at a position substantially aligned with the main bearing seat 180 in the axial direction of the compressor. Thus, the low-temperature and low-pressure working fluid evaporated by the evaporator is sucked into the scroll compressor 100 via the suction fitting 194 for compression.

[0031] The scroll compressor 100 further includes a driving mechanism 130. The driving mechanism 130 includes an electric motor 132 and a driving shaft 134. The electric motor 132 includes a stator 137 and a rotor 138. The stator 137 is fixedly connected to the inner peripheral wall surface of the housing body 112, and the rotor 138 is fixedly sleeved on the driving shaft 134 to rotate integrally with the driving shaft 134. An eccentric pin 139 is provided at the top end portion of the driving shaft 134.

[0032] The scroll compressor 100 further includes a main bearing seat 180. The main bearing seat 180 is fixedly connected to the inner peripheral wall surface of the housing body 112. The main bearing seat 180 is fixedly connected to the inner peripheral wall surface of the housing body 112 by means of its multiple circumferentially spaced radial protrusions, so that a plurality of main bearing seat passages PG are formed between the main bearing seat 180 and the inner peripheral wall surface of the housing body 112 (i.e., between adjacent radial protrusions of the main bearing seat 180) to allow the passage of the low-pressure working fluid sucked into the internal volume IV. The main bearing seat 180 supports a portion of the drive shaft 134 via a main bearing 182 disposed in the main bearing seat 180.

[0033] The scroll compressor 100 further includes a compression mechanism CM adapted to compress a working fluid (such as a refrigerant). The compression mechanism CM includes a movable scroll component 150 and a fixed scroll component 160.

[0034] The movable scroll component 150 includes: an end plate 152; a spiral movable scroll 154 extending upward from a radially central portion of an upper surface of the end plate 152; and a hub 156 extending downward from a radially central portion of a lower surface of the end plate 152. The movable scroll component 150 is arranged on a main bearing seat 180 and is axially supported by the main bearing seat 180 so as to be able to orbit. The eccentric pin 139 is drivingly coupled to (inserted into) the hub 156 (via an unloading bushing 190 and / or a driving bearing).

[0035] The fixed scroll component 160 includes: an end plate 162; a spiral fixed scroll 164 extending downward from the lower surface of the end plate 162; a discharge port 166 formed at the approximate center of the end plate 162 and adapted to communicate with the central compression chamber ZC of the compression mechanism CM; and a recess 168 formed at the approximate center of the end plate 162, the recess 168 being located above the discharge port 166 and adapted to communicate with the discharge port 166 and adapted to communicate with the discharge pressure zone HR. A discharge valve assembly (such as an HVE valve assembly) 192 is provided in the recess 168 to control the exhaust of the compression mechanism CM. In the illustrated example, the fixed scroll 164 includes a (annular) outer wall located at the radially outermost side, and a compression mechanism suction window SW is provided in the outer wall at an appropriate circumferential position, the suction window SW allowing a low-pressure working fluid to be sucked into the compression mechanism CM, wherein the suction window SW defines the suction pressure zone SP.

[0036] The fixed scroll 164 is adapted to engage with the movable scroll 154, thereby defining a series of crescent-shaped working fluid receiving chambers. These receiving chambers include: an unclosed fluid suction chamber SC with a relatively low pressure that is taking in air; a closed compression receiving chamber with an increased pressure that is compressing; and a central compression chamber ZC that has completed compression and is being exhausted via the discharge port 166 and the discharge valve assembly 192. The fluid suction chamber SC is adapted to communicate with the suction window SW, so as to be able to receive the low-pressure working fluid sucked from the suction window SW.

[0037] The scroll compressor 100 also includes a lubrication system mainly used to provide lubrication to the various relatively moving parts of the compressor (such as the compression mechanism CM, the main bearing 182, the eccentric pin 139, the unloading bushing 190 and the drive bearing). The lubrication system includes: the oil pool OR (main lubricant source) mentioned above; an oil supply channel provided in the drive shaft 134, including a central hole 135 located at the lower part of the drive shaft and an eccentric hole 136 located at the upper part of the drive shaft; a lubricant storage area (secondary lubricant source) for lubricating the eccentric pin 139 and temporarily storing the lubricant temporarily staying in the main bearing seat 180 after lubricating the eccentric pin 139, the unloading bushing 190, the drive bearing and / or the main bearing 182; a compression mechanism oil supply structure CO (see Figure 2); and an oil return passage for returning lubricant from the lubricant storage area to the oil pool OR.

[0038] In particular, the lubricant storage area includes a lubricant storage area OA (base area of ​​the movable scroll end plate) located between the eccentric pin 139, the unloading bushing 190 and / or the top end surface of the drive bearing and the lower surface of the movable scroll end plate 152 and located in the hub 156 (see Figure 2 ).

[0039] When the scroll compressor 100 is running, the electric motor 132 is energized to rotate the rotor 138 and the drive shaft 134 integrally. At this time, the eccentric pin 139 integrally formed with the drive shaft 134 also rotates, thereby driving the hub 156 via the unloading bushing 190 and / or the drive bearing, thereby causing the movable scroll component 150 to translate relative to the fixed scroll component 160 with the aid of the cross ring 199, i.e., to revolve (that is, the axis of the movable scroll component 150 revolves relative to the axis of the fixed scroll component 160, but the movable scroll component 150 and the fixed scroll component 160 themselves do not rotate around their respective axes). At the same time, the low-pressure working fluid sucked from the suction fitting 194 passes through the main bearing seat 180 along the main bearing seat passage PG and then enters the compression mechanism CM (specifically, enters the fluid suction chamber SC) through the suction window SW.

[0040] Thus, each accommodating chamber defined by the fixed scroll 164 and the movable scroll 154 changes from an unclosed fluid suction chamber SC to a compression accommodating chamber and then to a central compression chamber ZC (with exhaust pressure) in the process of moving from the radial outer side to the radial inner side, and the volume gradually changes from large to small. In this way, the pressure in the accommodating chamber also gradually increases, so that the working fluid is compressed and finally discharged from the discharge port 166 to the discharge pressure zone HR and then discharged to the outside of the compressor through the discharge fitting (not shown).

[0041] At the same time, under the action of the centrifugal force generated by the rotation of the drive shaft 134, the lubricant can be transported from the oil pool OR to the lubricant storage area (such as the lubricant storage area OA) through the oil supply channel (specifically, the central hole 135 and the eccentric hole 136). Then, through the compression mechanism oil supply structure CO, a part of the lubricant temporarily stored in the lubricant storage area OA is supplied to the compression mechanism CM (for example, supplied to a suitable area of ​​the fluid suction chamber SC) to provide lubrication to the compression mechanism CM. Then, the remaining lubricant temporarily stored in the lubricant storage area OA is returned to the oil pool OR through the oil return channel.

[0042] Refer to the following Figure 2 The case of the compression mechanism oil supply structure CO of the lubrication system of the comparative example is described. Figure 2 2 is a longitudinal sectional view showing a movable scroll component incorporating an oil supply structure of a compression mechanism according to a comparative example.

[0043] The compression mechanism oil supply structure CO includes: an oil inlet end (oil inlet hole) 201 connected to the lubricant storage area OA; and a transverse hole 205 connected to the oil inlet end 201. The oil inlet end 201 and the transverse hole 205 are formed in the movable scroll end plate 152. The oil inlet end 201 is an axial hole extending in the axial direction. The opening position (outflow opening position) of the transverse hole 205 opening to the outer peripheral surface 152a is set to be in the flow path of the sucked low-pressure working fluid. The suction fitting 194 is arranged to be aligned with the main bearing seat channel PG.

[0044] Furthermore, the transverse hole 205 includes a counterbore 205a located at a radially outer section, and the inner diameter of the counterbore 205a is greater than the inner diameter of the remaining sections of the transverse hole 205. The compression mechanism oil supply structure CO also includes an oil outlet hole 203 connected to a suitable area of ​​the fluid suction chamber SC. The plug 207 is suitable for being connected to the counterbore 205a, and a through hole 207a is provided in the plug 207.

[0045] Thus, according to the oil supply structure of the compression mechanism of the comparative example, during the operation of the scroll compressor, when the lubricant from the lubricant storage area OA is discharged from the opening of the transverse hole 205 out of the movable scroll end plate 152, the discharged lubricant is actively made to meet the sucked low-pressure working fluid, so that the low-pressure working fluid can bring a part of the lubricant into the compression mechanism CM. Compared with the scheme in which an active oil injection mechanism is not provided for supplying oil to the compression mechanism, the oil circulation rate can be within an appropriate range under different compressor speeds and / or different system operating parameters. In addition, by providing a counterbore, it is helpful to reduce the speed at which the lubricant is discharged from the movable scroll end plate and to improve the mist injection of the lubricant; by additionally providing an outlet hole, the lubricant is allowed to be directly delivered to the fluid suction chamber SC, that is, the compression mechanism CM, thereby appropriately increasing the oil circulation rate; and, by alternatively providing a plug with a through hole, the degree of freedom in adjusting the oil circulation rate is increased.

[0046] However, the above oil supply structure CO is limited by its simple structural design and cannot adjust the oil injection amount or oil circulation rate according to the change of working conditions to meet the requirements of compressor performance energy efficiency or reliability under different working conditions. There are problems of compressor energy efficiency or reliability caused by too little or too much oil injection under different working conditions (for example, under rated load or light load conditions and under severe conditions such as high load (for example, high speed) or high temperature).

[0047] In view of the above, the present invention proposes an inventive concept: different operating conditions (described by, for example, suction pressure and discharge pressure, evaporation pressure and condensation pressure, suction temperature and exhaust temperature) correspond to different compressor loads, so the pressure difference between the discharge pressure and the suction pressure can be used to adjust the injection amount under different compressor loads (that is, to establish a dynamic correspondence between the operating condition and the injection amount, for example, to increase the injection amount when the load is high and the pressure difference is high, and to reduce the injection amount when the load is rated or the load is low and the pressure difference is low) to improve the energy efficiency or reliability of the compressor system.

[0048] Combine the following Figure 3 and Figure 4 as well as Figure 1 and Figure 2 The present invention mainly describes the scroll compression mechanism with an oil supply structure. Compared with the compressor of the comparative example, other components except the oil supply structure are basically the same or similar, and the figure marks of the same components in the scroll compressor combined with the oil supply structure of the comparative example continue to be used.

[0049] The oil supply structure of the scroll compression mechanism of the present invention includes an oil supply passage provided in the movable scroll end plate 152, a regulating valve 320 and a fluid pressure passage 330, wherein the oil supply passage is used to supply lubricating oil from a lubricating oil source to the scroll compression mechanism CM. The regulating valve 320 includes a movable valve body 321, and the fluid pressure channel 330 includes a first end 331 and a second end 332. The first end 331 is connected to the central compression chamber ZC on the high-pressure side (the central compression chamber ZC is fluidically connected to the discharge pressure zone HR) to apply a higher first / discharge pressure to the first / high-pressure side end of the movable valve body 321, and the second end 332 is connected to the suction pressure zone / low-pressure zone SP located outside the scroll compression mechanism CM to apply a lower second / suction pressure to the second / low-pressure side end of the movable valve body 321, so that the movable valve body 321 can selectively move toward a first direction that reduces the flow cross-sectional area of ​​the oil supply channel and move in a second direction that is opposite to the first direction that increases the flow cross-sectional area of ​​the oil supply channel based on the pressure difference between the first / discharge pressure and the second / suction pressure, thereby adjusting the oil supply to the compression mechanism CM according to the pressure difference corresponding to the change in operating conditions.

[0050] With the help of the above-mentioned oil supply structure, the oil injection amount or oil circulation rate can be dynamically adjusted according to changes in operating conditions. For example, under high load conditions (high suction temperature and exhaust temperature, high condensing temperature and evaporating temperature), as the pressure difference between the discharge pressure and the suction pressure becomes larger, the oil injection amount is increased accordingly, so that the increased oil circulation rate ensures sufficient lubricant lubrication requirements to ensure the stability and reliability of the compressor system operation. Under rated load or light load, the oil injection amount is reduced accordingly to improve the energy efficiency of the compressor system.

[0051] In experimental tests, for example, when other working conditions or performance parameters of the compressor are the same, at different evaporation temperatures / condensation temperatures: 45 / 95, 45 / 120, 55 / 150, 40 / 150, the compression mechanism of the prior art oil supply structure provides a substantially constant oil circulation rate of 1.5%, so that an excessively high oil lubrication rate is provided at low evaporation temperatures / condensation temperatures and an excessively low oil lubrication rate is provided at high evaporation temperatures / condensation temperatures, thereby exceeding the expected range of the oil lubrication rate. In contrast, the compression mechanism of the oil supply structure according to the present invention provides an adaptable oil circulation rate: 0.5%, 0.5%, 1.5% and 1.4%, so that the oil circulation rate under each operating condition can be within the expected range of the oil lubrication rate under the corresponding operating condition.

[0052] Those skilled in the art will appreciate that, although the lower pressure source shown is the low pressure area SP outside the scroll compression mechanism CM, the lower pressure source may also be an unsealed lower pressure fluid suction chamber SC that is taking in air.

[0053] exist Figure 3 and Figure 4 In the embodiment, similar to the comparative example, an oil outlet hole 203 connected to an appropriate area of ​​the fluid suction chamber SC is provided on the movable scroll end plate 152, and the oil outlet hole 203 can be in the form of a vertical hole or an oblique hole and serve as a part of the oil supply channel. In an embodiment of the present application, the oil outlet hole 203 is a vertical oil supply channel roughly parallel to the central axis of the scroll compression mechanism. The movable valve body 321 is partially disposed in the vertical oil supply channel 203, so as to adjust the flow cross-sectional area of ​​the oil supply channel by adjusting the flow cross-sectional area of ​​the vertical oil supply channel 203. The oil supply channels 310, 310' also include a transverse oil supply channel roughly perpendicular to the central axis of the scroll compression mechanism CM, and the transverse oil supply channel intersects and communicates with the vertical oil supply channel 203 to supply lubricating oil from the lubricating oil source to the scroll compression mechanism CM.

[0054] like Figure 3 and Figure 4 As shown, the fluid pressure channel 330 may include a transverse fluid pressure hole 333 substantially perpendicular to the central axis of the scroll compression mechanism CM. According to actual needs such as the shape and structure of the movable scroll end plate 152, the transverse fluid pressure hole 333 may be arranged horizontally or vertically with the transverse oil supply hole in the movable scroll end plate 152. For example, when the movable scroll end plate is thicker, the transverse fluid pressure hole 333 and the transverse oil supply hole 311 of the oil supply channel 310 may be arranged vertically, as shown in FIG. Figure 3 shown.

[0055] In an advantageous aspect of the embodiment, the transverse fluid pressure channel 333 partially overlaps with the vertical oil supply channel 203 in the vertical direction parallel to the central axis, so that an effective oil supply channel design is achieved to avoid machining additional communication channels. Figure 4 In the figure, the transverse fluid pressure hole 333 is arranged horizontally with the transverse oil supply hole of the oil supply channel 310', and the transverse oil supply hole includes a main transverse oil supply hole 311' arranged side by side with the transverse fluid pressure hole 333 and connected to the lubricant source (through the oil inlet end 201). In addition, the transverse oil supply hole also includes a secondary transverse oil supply hole 312' that intersects and connects with both the main transverse oil supply hole 311' and the vertical oil supply hole 203, that is, the main transverse oil supply hole 311' intersects and connects with the vertical oil supply hole 203 through the secondary transverse oil supply hole 312'. It can be understood that the transverse oil supply hole may only include the main transverse oil supply hole 311', and the main transverse oil supply hole 311' may be an oblique oil supply hole relative to the transverse fluid pressure hole 333 and directly intersects and connects with the vertical oil supply hole 203. In the figure, the transverse oil supply hole 333 is arranged side by side with the transverse fluid pressure hole 333 and is directly connected with the vertical oil supply hole 203. Figure 3 In the embodiment, the transverse fluid pressure hole 333 is arranged vertically and side by side with the transverse oil supply hole 311, wherein the transverse oil supply hole 311 is connected to the lubricant source (through the oil inlet end 201) and intersects and communicates with the vertical oil supply hole 203. In fact, this arrangement makes the transverse oil supply hole 311, the vertical oil supply hole 203 and the transverse fluid pressure hole 333 substantially in the same vertical plane, so as to achieve a more effective oil supply hole design.

[0056] The regulating valve 320 further includes an elastic member 322 configured to abut against the second / low-pressure side end of the movable valve body 321. The elastic member 322 is shown as a spring, one end of which is connected to a plug in a counterbore provided at a radially outer section of the lateral fluid pressure channel 333, and the other end of the spring is connected to the second / low-pressure side end of the movable valve body 321, adapted to bias the movable valve body 321 toward the first / high-pressure side.

[0057] The movable valve body 321 includes a connecting section connecting the first / high-pressure side end and the second / low-pressure side end, the connecting section is tapered relative to the first / high-pressure side end and the second / low-pressure side end, the connecting section in the figure is shown as a stepped surface, and can also be a curved surface or a conical surface. The diameter of the tapered connecting section is smaller than the diameter of the first / high-pressure side end and smaller than the diameter of the second / low-pressure side end. When the compressor is in different working conditions, for example, at rated load or light load, the pressure difference between the first / discharge pressure and the second / suction pressure is less than the biasing force of the elastic component, so that the movable valve body 321 moves toward the first / high-pressure side, and the tapered connecting section occupies less (the low-pressure side end with a larger diameter occupies more) the oil supply channel, such as the vertical oil supply channel 203, thereby reducing the flow cross-sectional area of ​​the oil supply channel, thereby reducing the amount of oil injection; at high load, the pressure difference between the first / discharge pressure and the second / suction pressure is greater than the biasing force of the elastic component, so that the movable valve body 321 moves toward the second / low-pressure side, and the tapered connecting section occupies more (the low-pressure side end with a larger diameter occupies less) the vertical oil supply channel 203, thereby increasing the flow cross-sectional area of ​​the oil supply channel, thereby increasing the amount of oil injection.

[0058] The figure shows that the base area OA near the movable scroll end plate 152 in the internal space of the hub 156 of the movable scroll component 150 is used as a lubricating oil source, and the oil inlet end 201 of the oil supply passage is connected to the base area OA. The oil pool OR at the bottom of the internal volume IV stored in the housing 110 can also be used as a lubricating oil source.

[0059] Those skilled in the art will appreciate that the first pressure changes with changes in the operating condition of the scroll compression mechanism CM or with changes in the working state of the system to which the scroll compression mechanism CM is applied, and / or the second pressure changes with changes in the operating condition of the scroll compression mechanism CM or with changes in the working state of the system to which the scroll compression mechanism CM is applied.

[0060] In the present application document, the use of the directional terms "horizontal", "vertical", etc. is only for the purpose of convenience of description and should not be regarded as limiting.

[0061] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the specific embodiments described and shown in detail herein, and that various changes may be made to the exemplary embodiments by those skilled in the art without departing from the scope defined by the claims.

Claims

1. A scroll compression mechanism (CM), comprising: A fixed scroll component (160) and an orbiting scroll component (150) including an orbiting scroll end plate (152), wherein the orbiting scroll component (150) and the fixed scroll component (160) cooperate with each other to define a series of working fluid chambers including a central compression chamber (ZC) and a fluid suction chamber (SC); as well as an oil supply passage (310, 310'), wherein the oil supply passage (310, 310') is used to supply lubricating oil from a lubricating oil source to the scroll compression mechanism (CM), Characterized in that the scroll compression mechanism also includes: A regulating valve (320), the regulating valve (320) comprising a movable valve body (321); and a fluid pressure channel (330), the fluid pressure channel (330) comprising a first end (331) and a second end (332), The first end (331) is fluidly connected to a first pressure source to apply a first pressure to a first side end of the movable valve body (321), and the second end (332) is fluidly connected to a second pressure source to apply a second pressure to a second side end of the movable valve body (321), so that the movable valve body (321) can selectively move toward a first direction that reduces the flow cross-sectional area of ​​the oil supply channel (310, 310') and move toward a second direction that is opposite to the first direction that increases the flow cross-sectional area of ​​the oil supply channel (310, 310') based on the pressure difference between the first pressure and the second pressure, thereby adjusting the oil supply to the scroll compression mechanism (CM).

2. The scroll compression mechanism (CM) according to claim 1, wherein: The oil supply passage (310, 310'), the regulating valve (320) and the fluid pressure passage (330) are arranged in the movable scroll end plate (152).

3. The scroll compression mechanism (CM) according to claim 2, wherein: The oil supply passage (310, 310') comprises a vertical oil supply hole (203) substantially parallel to the central axis of the scroll compression mechanism, the vertical oil supply hole (203) leads to the fluid suction chamber (SC), and The movable valve body (321) is partially disposed in the vertical oil supply hole (203), so that the flow cross-sectional area of ​​the oil supply channel (310, 310') is adjusted by adjusting the flow cross-sectional area of ​​the vertical oil supply hole (203).

4. The scroll compression mechanism (CM) according to claim 3, wherein: The oil supply channel (310, 310') further comprises a transverse oil supply hole (311, 311', 312') substantially perpendicular to the central axis, and the transverse oil supply hole (311, 311', 312') intersects and communicates with the vertical oil supply hole (203).

5. The scroll compression mechanism (CM) according to claim 4, wherein: The fluid pressure channel (330) includes a transverse fluid pressure aperture (333) substantially perpendicular to the central axis, and The transverse fluid pressure holes (333) and the transverse oil supply holes (311, 311', 312') are arranged horizontally or vertically in the movable scroll end plate (152).

6. The scroll compression mechanism (CM) according to claim 5, wherein: The transverse fluid pressure channel (333) partially overlaps with the vertical oil supply channel (203) in a vertical direction parallel to the central axis. In the case where the transverse fluid pressure hole (333) and the transverse oil supply hole (311', 312') are arranged horizontally, the transverse oil supply hole (311', 312') includes a main transverse oil supply hole (311') arranged side by side with the transverse fluid pressure hole (333), and the transverse oil supply hole (311', 312') also includes a secondary transverse oil supply hole (312') intersecting and communicating with both the main transverse oil supply hole (311') and the vertical oil supply hole (203). In the case where the transverse fluid pressure hole (333) and the transverse oil supply hole (311) are arranged vertically, the transverse oil supply hole (311) and the transverse fluid pressure hole (333) are arranged side by side.

7. The scroll compression mechanism (CM) according to claim 2, wherein: The movable scroll component (150) includes a hub (156), a base area (OA) in the internal space of the hub (156) close to the movable scroll end plate (152) is used as the lubricating oil source, and the oil inlet end (201) of the oil supply channel is connected to the base area (OA).

8. The scroll compression mechanism (CM) according to any one of claims 1 to 7, wherein: The first pressure changes with the change of the working condition of the scroll compression mechanism (CM) or with the change of the working state of the system to which the scroll compression mechanism (CM) is applied, and / or the second pressure changes with the change of the working condition of the scroll compression mechanism (CM) or with the change of the working state of the system to which the scroll compression mechanism (CM) is applied.

9. The scroll compression mechanism (CM) according to any one of claims 1 to 7, wherein: The regulating valve (320) further comprises an elastic component (322) configured to abut against the second side end, wherein the elastic component (322) is suitable for biasing the movable valve body (321) toward the first direction.

10. The scroll compression mechanism (CM) according to any one of claims 1 to 7, wherein: The first pressure source is the central compression chamber (ZC); and / or The second pressure source is the fluid suction chamber (SC) or a low pressure area (SP) located outside the scroll compression mechanism (CM).

11. The scroll compression mechanism (CM) according to any one of claims 1 to 7, wherein: The movable valve body (321) comprises a connecting section connecting the first side end and the second side end, the diameter of the connecting section is smaller than the diameter of the first side end and smaller than the diameter of the second side end, and The regulating valve (320) is arranged such that: when the movable valve body (321) moves toward the first direction, the connecting section occupies less space in the oil supply passage (310, 310') and reduces the flow cross-sectional area of ​​the oil supply passage; when the movable valve body (321) moves toward the second direction, the connecting section occupies more space in the oil supply passage (310, 310') and increases the flow cross-sectional area of ​​the oil supply passage.

12. A scroll compressor, characterized in that: The scroll compressor comprises a scroll compression mechanism (CM) according to any one of claims 1 to 11.

Images