Scroll compressor and air conditioner

Abstract

The application provides a scroll compressor, which comprises a dynamic disc, a static disc and a back pressure cavity, a compression cavity is formed between the dynamic disc and the static disc, an end face of the dynamic disc towards the static disc is a first end face, an end face of the static disc towards the dynamic disc is a second end face, the first end face and the second end face are in abutment, the compression cavity and the back pressure cavity are communicated through a pressure regulating hole, a first groove is arranged on the first end face or the second end face, the pressure regulating hole passes through the first groove, and a rotating block is arranged in the first groove; in one rotation cycle of the dynamic disc, the rotating block can be positively rotated with the increase of temperature to gradually reduce the minimum communication area of the pressure regulating hole or gradually reduce the communication duration of the pressure regulating hole; and in one rotation cycle of the dynamic disc, the rotating block can be reversely rotated with the decrease of temperature to increase the minimum communication area of the pressure regulating hole or increase the communication duration of the pressure regulating hole, so that the technical problem that the pressure in the back pressure cavity is too large in the low-frequency light working condition and the pressure in the back pressure cavity is too large in the high-frequency heavy working condition of the scroll compressor in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressors, and particularly relates to a scroll compressor and an air conditioner. BACKGROUND

[0002] In the operation process of the scroll compressor, a back pressure cavity is usually arranged to prevent the dynamic disc from tilting, and the pressure in the back pressure cavity makes the end face of the dynamic disc adhere to the end face of the static disc to avoid the tilting of the dynamic disc. If the back pressure is too small, axial gap leakage is prone to occur; and if the back pressure is too large, the end face friction and wear are prone to be aggravated.

[0003] To solve the above problems, the existing back pressure design usually transmits the intermediate pressure in the static disc to the back face of the dynamic disc (i.e. the back pressure cavity) through the dynamic disc through hole or transmits the intermediate pressure in the dynamic disc to the back face of the dynamic disc through the static disc end face flow groove. Both of the two ways are to form a pressure on the back face of the dynamic disc to balance the axial gas force of the pump body, so that the end face of the dynamic disc always adheres to the end face of the static disc in the actual operation of the compressor. However, both of the two ways cannot avoid a common disadvantage that the pressure increase ratio of the existing back pressure design is constant, and the pressure increase ratio is a fixed value, which cannot accurately meet the back pressure demand under different working conditions. This leads to that the seal between the dynamic disc and the static disc is good and the pressure is appropriate under light load, but the pressure in the back pressure cavity is too large under heavy load, the friction between the dynamic disc and the static disc is too large, high temperature is caused in the operation process, and further adhesion wear occurs. Long-term work leads to that the wear between the dynamic disc and the static disc is fast, the seal is reduced, and the service life is reduced.

[0004] How to ensure that the axial pressure between the dynamic disc and the static disc of the scroll compressor is in an appropriate range under heavy load and light load, which can ensure the seal and avoid excessive pressure, is a problem to be solved at present. SUMMARY

[0005] Therefore, the present application provides a scroll compressor and an air conditioner, which can solve the technical problem that the pressure in the back pressure cavity of the scroll compressor in the prior art is too small under low frequency and light working condition, and the pressure in the back pressure cavity is too large under high frequency and heavy working condition.

[0006] The present application provides a scroll compressor, which comprises a dynamic disc, a static disc and a back pressure cavity. The dynamic disc and the static disc form a compression cavity, and the back pressure cavity is located on the axial two sides of the dynamic disc. The end face of the dynamic disc facing the static disc is a first end face, the end face of the static disc facing the dynamic disc is a second end face, the first end face and the second end face are in close contact, the compression cavity and the back pressure cavity are communicated through a pressure regulating hole, a first groove is arranged on the first end face or the second end face, the pressure regulating hole is communicated with the first groove, and a rotating block is arranged in the first groove.

[0007] In one rotation cycle of the dynamic disc, the rotating block can rotate forward with the temperature rising to gradually reduce the minimum communication area of the pressure regulating hole or gradually reduce the communication time length of the pressure regulating hole; in one rotation cycle of the dynamic disc, the rotating block can rotate reversely with the temperature falling to increase the minimum communication area of the pressure regulating hole or increase the communication time length of the pressure regulating hole.

[0008] In some embodiments, the pressure regulating hole comprises a first hole and a second hole, the first hole is arranged on the static disc and the second hole is arranged on the dynamic disc, and the first recess is arranged on the first end face; when the first hole is arranged on the dynamic disc and the second hole is arranged on the static disc, the first recess is arranged on the second end face, and the inlet of the second hole is the air inlet.

[0009] The rotating block is provided with an adjusting hole, the inlet of the adjusting hole is always in communication with the first hole, and the outlet of the adjusting hole is located on the end face of the rotating block close to the second hole.

[0010] In the projection of the axial direction of the static disc and in one rotation cycle of the dynamic disc, the rotation of the rotating block can adjust the minimum overlapping area of the outlet of the adjusting hole and the air inlet, or the rotation of the rotating block can adjust the time length of the disconnection of the outlet of the adjusting hole and the air inlet.

[0011] In some embodiments, in the projection of the axial direction of the static disc, the outlet end of the adjusting hole is a waist-shaped hole, the center of the waist-shaped hole coincides with the rotation center of the rotating block; the maximum radius of the movement track of the air inlet is R1, the length of the short side of the waist-shaped hole is H1, and the length of the long side of the waist-shaped hole is H2.

[0012] The distance L1 between the center of the movement track of the air inlet and the center of the waist-shaped hole is greater than or equal to R1+0.5H1 and less than R1+0.5H2.

[0013] In some embodiments, the outlet of the adjusting hole is a circular hole, in the projection of the axial direction of the static disc, the distance between the outlet of the adjusting hole and the rotation center of the rotating block is L2, the distance between the air inlet and the rotation center of the rotating block is L3, the radius of the outlet of the adjusting hole is R2, and the radius of the movement track of the air inlet is R3.

[0014] Then, 0

[0015] In some embodiments, a mounting groove is arranged on the sidewall of the first groove, a strip-shaped thermal element is arranged in the mounting groove, a first end of the thermal element is fixedly connected in the mounting groove, a second end of the thermal element is connected to the rotating block, and the distance between the extension line of the thermal element in the length direction and the rotating axis of the rotating block is greater than 0.

[0016] In some embodiments, the second end of the thermal element is provided with a connecting head, a second groove is recessed in the sidewall of the rotating block, a slide rail is arranged between the opposite sidewalls of the second groove, and the connecting head is in sliding connection with the slide rail.

[0017] In some embodiments, a slide rod is arranged between the opposite sidewalls of the second groove, a T-shaped groove is arranged on the slide rod, and the connecting head is arranged in the T-shaped groove.

[0018] In some embodiments, the distance between the opposite sidewalls of the second groove is W, the maximum extension or shortening amount of the length of the thermal element is L, and W≥2.3L.

[0019] In some embodiments, the bottom surface of the groove is a first sealing surface, and the rotating block is provided with a second sealing surface opposite to the first sealing surface.

[0020] The pressure regulating hole comprises a sealing hole leading to the first sealing surface, the second sealing surface is provided with a connecting pipe, the adjusting hole comprises an inner hole of the connecting pipe, the axis of the connecting pipe coincides with the axis of the rotating block, and the connecting pipe can be inserted into and rotated in the sealing hole.

[0021] In some embodiments, a first baffle is arranged in the sealing hole, the first baffle closes part of the sealing hole, and an end surface of the end of the connecting pipe away from the rotating block is provided with a second baffle, the second baffle closes part of the inner hole of the connecting pipe.

[0022] The plate surface of the first baffle facing the second baffle is sealingly attached to the plate surface of the second baffle facing the first baffle.

[0023] In some embodiments, the end surfaces of the vortex teeth of the orbiting scroll and the vortex teeth of the fixed scroll are provided with oil grooves.

[0024] The application further provides an air conditioner comprising the scroll compressor.

[0025] This invention incorporates a rotating block that rotates according to temperature. When the temperature rises (due to high-frequency heavy operating conditions), the rotating block rotates forward to reduce the communication area of ​​the pressure regulating hole or the communication time within one rotation cycle of the moving disc, thereby preventing excessive pressure rise in the back pressure chamber and resulting in excessive axial friction between the moving and stationary discs. When the temperature decreases (due to low-frequency light operating conditions), the rotating block rotates in the reverse direction to increase the communication area of ​​the pressure regulating hole or the communication time within one rotation cycle of the moving disc, thereby preventing excessive pressure drop in the back pressure chamber, which could lead to insufficient back pressure on the moving disc causing overturning or insufficient axial sealing between the moving and stationary discs. Ultimately, this achieves stable operation of the scroll compressor and improves its reliability. Attached Figure Description

[0026] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0027] Figure 1 This is a bottom view of the stationary and moving disk assemblies according to an embodiment of the present invention;

[0028] Figure 2 This is an embodiment of the present invention. Figure 1 Sectional view along line AA;

[0029] Figure 3 This is an embodiment of the present invention. Figure 2 Enlarged view at point C;

[0030] Figure 4 This is a schematic diagram of the movement trajectory of the waist-shaped hole covering the air inlet in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the movement trajectory of the waist-shaped hole covering most of the air inlet in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the movement trajectory of the waist-shaped hole covering a small portion of the air inlet in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram showing the separation of the movement trajectory of the waist-shaped hole and the air inlet in an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the movement trajectory of the rotating block in an embodiment of the present invention, where the outlet of the rotating block is a circular hole and it covers the air inlet.

[0035] Figure 9Fig. 1 is a schematic view of the movement track of the outlet of the rotating block of the embodiment of the present application when the outlet is a circular hole and covers most of the movement track of the gas inlet;

[0036] Figure 10 Fig. 2 is a schematic view of the movement track of the outlet of the rotating block of the embodiment of the present application when the outlet is a circular hole and covers a small part of the movement track of the gas inlet;

[0037] Figure 11 Fig. 3 is a schematic view of the movement track of the outlet of the rotating block of the embodiment of the present application when the outlet is a circular hole and is separated from the movement track of the gas inlet;

[0038] Figure 12 Fig. 4 is a schematic view of the embodiment of the present application when the short side of the waist-shaped hole is smaller than the inner diameter of the movement track of the gas inlet;

[0039] Figure 13 Fig. 5 is a first schematic view of the structure of the rotating block of the embodiment of the present application;

[0040] Figure 14 Fig. 6 is a second schematic view of the structure of the rotating block of the embodiment of the present application;

[0041] Figure 15 Fig. 7 is a third schematic view of the structure of the rotating block of the embodiment of the present application;

[0042] Figure 16 Fig. 8 is a schematic view of the cross section of the slide bar when the thermal element of the embodiment of the present application is arranged on the slide bar;

[0043] Figure 17 Fig. 9 is a schematic view of the thermal element of the embodiment of the present application;

[0044] Figure 18 Fig. 10 is a schematic view of the end surface of the slide bar of the embodiment of the present application;

[0045] Figure 19 Fig. 11 is a schematic view of the rotating position of the rotating block of the embodiment of the present application when the scroll compressor is in light load and low frequency;

[0046] Figure 20 Fig. 12 is a schematic view of the rotating position of the rotating block of the embodiment of the present application when the scroll compressor is in heavy load and high frequency; Figure 19 Fig. 13 is an enlarged view of the middle B of Fig. 12;

[0047] Figure 21 Fig. 14 is a partial enlarged view of the schematic view of the rotating position of the rotating block of the embodiment of the present application when the scroll compressor is in heavy load and high frequency;

[0048] Figure 22 Fig. 15 is a schematic view of the end surface of the sealing hole when the first baffle is arranged in the embodiment of the present application;

[0049] Figure 23 Fig. 16 is a schematic view of the end surface of the connecting pipe when the second baffle is arranged in the embodiment of the present application;

[0050] Figure 24Figure 2 is an axial view of the connecting pipe inserted into the sealing hole in the embodiment of the present application;

[0051] Figure 25 Figure 4 is a schematic diagram of pressure change in the back pressure cavity in the prior art and the present application.

[0052] The reference signs are as follows:

[0053] 1, moving disc; 2, stationary disc; 201, first groove; 202, first hole; 3, back pressure cavity; 301, air inlet; 302, second hole; 3021, sealing hole; 4, compression cavity; 5, pressure regulating hole; 6, rotating block; 601, second groove; 602, sliding rod; 603, T-shaped groove; 604, connecting pipe; 605, waist-shaped hole; 7, thermal element; 701, connecting head; 801, first baffle; 802, second baffle; 901, first passage; 902, second passage. DETAILED DESCRIPTION

[0054] 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 some of the embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0055] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0056] It should be understood that the term "and / or" used herein is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0057] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless specifically so stated. Also, it is to be understood that the structural, proportional, and size relationships illustrated in the drawings are not necessarily those which would be constructed in an actual application, and instead are intended to be exemplary only. Any modification of the structural, proportional, or size relationships, or any other changes in the placement of components, are intended to be within the scope of the application. The application is not limited to the specific examples described in this application, but only by the claims. Any techniques, methods, and devices known to those of ordinary skill in the relevant art can be used unless specifically stated otherwise. In all examples shown and discussed herein, any specific values are to be interpreted as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments can have different values. It is to be noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion on these like elements will be "repeated" in connection with the other drawings further discussed below.

[0058] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", "top", "bottom", and the like are generally based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0059] For the convenience of description, spatial relative terms such as "above", "upper", "top", "up", and the like can be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations of the devices in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "on" the other device or structure will be positioned "below" or "under" the other device or structure. Thus, the exemplary term "above" can include both the "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0060] In addition, it should be noted that the use of the terms "first", "second", etc. to define parts is only for the convenience of distinguishing the corresponding parts, and the above terms have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0061] In combination with the accompanying Figures 1-25 As shown in the accompanying drawings, the present application provides a scroll compressor, which comprises a moving disc 1, a stationary disc 2 and a back pressure cavity 3. The moving disc 1 and the stationary disc 2 form a compression cavity 4 therebetween, and the back pressure cavity 3 is located on both axial sides of the moving disc 1 relative to the compression cavity 4. The end face of the moving disc 1 facing the stationary disc 2 is a first end face, and the end face of the stationary disc 2 facing the moving disc 1 is a second end face. The first end face and the second end face are in abutment, and the compression cavity 4 and the back pressure cavity 3 are in communication through a pressure regulating hole 5. A first recess 201 is provided on the first end face or the second end face, and the pressure regulating hole 5 leads to the first recess 201. A rotating block 6 is arranged in the first recess 201.

[0062] During one rotation cycle of the moving disc 1, the rotating block 6 can rotate forward to gradually reduce the minimum communication area of the pressure regulating hole 5 or gradually reduce the communication duration of the pressure regulating hole 5 as the temperature rises. During one rotation cycle of the moving disc 1, the rotating block 6 can rotate reversely to increase the minimum communication area of the pressure regulating hole 5 or increase the communication duration of the pressure regulating hole 5 as the temperature decreases.

[0063] The temperature of the scroll compressor is related to the working frequency and external working conditions. The heavier the external working conditions and the higher the working frequency, the higher the temperature of the scroll compressor. The lighter the external working conditions and the lower the working frequency, the lower the stability of the scroll compressor. In addition, friction generates heat, and the friction surface is more prone to sticking. By adjusting the pressure of the back pressure cavity 3 according to the size of the temperature, not only can the pressure in the back pressure cavity 3 be avoided from being too large or too small, and the moving disc 1 can be avoided from overturning, but also the axial friction surface between the moving disc 1 and the stationary disc 2 can be effectively avoided from sticking and burning out, which is particularly beneficial to reducing the power consumption of the scroll compressor under heavy load and high frequency working conditions and improving the APF energy efficiency of the whole machine.

[0064] When the scroll compressor is upgraded from low frequency light working condition to high frequency heavy working condition, the rotating speed of the orbiting plate 1 increases, the internal temperature rises, the forward rotation of the rotating block 6 reduces the communication area of the pressure regulating hole 5, the gas resistance increases, the pressure increase ratio of the back pressure cavity 3 decreases, the gas amount (and / or gas pressure) of the compression cavity 4 transferred to the back pressure cavity 3 increases less, considering the leakage of the back pressure cavity 3, the pressure of the back pressure cavity 3 also increases less; the higher the operating frequency of the scroll compressor (and / or the heavier the working condition), the higher the temperature, the greater the forward rotation angle of the rotating block 6, the smaller the communication area of the pressure regulating hole 5, the more the pressure increase ratio decreases, and the less the gas amount of the compression cavity 4 transferred to the back pressure cavity 3 also increases; (that is, the higher the temperature, the more the gas amount transferred to the back pressure cavity 3, but the increase of the gas amount is not at a fixed speed, but at a smaller and smaller speed), so that the increase of the pressure of the back pressure cavity 3 ensures the stability of the orbiting plate 1 without overturning, and avoids the pressure of the back pressure cavity 3 being too high, thereby reducing the axial friction between the orbiting plate 1 and the fixed plate 2 under high frequency and heavy load, and improving the reliability of the scroll compressor. As the operating frequency of the scroll compressor increases (and / or the working condition increases), the temperature of the compressor is also higher, the rotating block 6 continuously rotates forward, until the minimum communication area of the pressure regulating hole 5 decreases to 0, at this time the pressure regulating hole 5 no longer continuously communicates, but communicates for part of the time in one cycle of the orbiting plate 1, that is, the communication time of the pressure regulating hole 5 is reduced; and as the temperature further increases, the communication time of the pressure regulating hole 5 gradually decreases. The reason for reducing the communication time of the pressure regulating hole 5 to reduce the pressure increase speed of the back pressure cavity 3 is that when the pressure regulating hole 5 is connected, the compression cavity 4 delivers more gas amount (and / or gas pressure) to the back pressure cavity 3, and at the same time the gas in the back pressure cavity 3 continuously leaks outward, at this time the gas amount entering the back pressure cavity 3 is instantaneously higher, and since the orbiting plate 1 rotates at high frequency, the pressure of the back pressure cavity 3 is still increasing (not too high), the rotation of the orbiting plate 1 causes the pressure regulating hole 5 to be disconnected, at this time the compression cavity 4 no longer delivers gas to the back pressure cavity 3, and since the gas in the back pressure cavity 3 continues to leak outward, the gas in the back pressure cavity 3 decreases, and the pressure of the back pressure cavity 3 decreases. Since the orbiting plate 1 rotates at high frequency, the pressure in the back pressure cavity 3 does not fluctuate greatly in one cycle of the orbiting plate 1; in this way, the pressure of the back pressure cavity 3 is prevented from rising too high.

[0065] Similarly, when the scroll compressor gradually reduces from high frequency heavy duty condition to low frequency light duty condition, the internal temperature decreases, in one rotation cycle of the orbiting plate 1, the reverse rotation of the rotating block 6 reduces the disconnection time of the pressure regulating hole 5 (increases the connection time of the pressure regulating hole 5), and as the temperature further decreases (the working frequency decreases, the working load decreases), the connection time of the pressure regulating hole 5 gradually increases. The reason why increasing the connection time of the pressure regulating hole 5 can reduce the speed of the pressure reduction of the back pressure chamber 3 is that when the pressure regulating hole 5 is connected, the gas amount (and / or the gas pressure) delivered by the compression chamber 4 to the back pressure chamber 3 is less, and at the same time the gas in the back pressure chamber 3 continues to leak outwards, at this time the gas amount (and / or the gas pressure) entering the back pressure chamber 3 is less, which makes the pressure of the back pressure chamber 3 decrease, the working frequency of the scroll compressor gradually decreases (the working load decreases), the connection time of the pressure regulating hole 5 increases, although the speed of the gas amount entering the back pressure chamber 3 decreases, but the time length increases, so that the speed of the pressure reduction in the back pressure chamber 3 will not be too fast; as the working frequency of the scroll compressor further decreases, the disconnection time of the pressure regulating hole 5 gradually decreases to 0, the compression chamber 4 continuously delivers gas to the back pressure chamber 3, so as to avoid the pressure of the back pressure chamber 3 being too low; the rotating block 6 continuously rotates reversely, and the minimum connection area of the pressure regulating hole 5 also gradually increases, although the speed of the entering gas decreases, but the damping also decreases, so as to ensure that the pressure of the back pressure chamber 3 will not decrease too much, and ensure the axial sealing between the orbiting plate 1 and the fixed plate 2 and avoid the phenomenon of the orbiting plate 1 overturning.

[0066] The forward rotation and the reverse rotation are relative rotation directions, and there is no primary and secondary.

[0067] The present application makes the pressure of the back pressure chamber 3 not too low in the low frequency light duty condition, and the pressure of the back pressure chamber 3 not too high in the high frequency heavy duty condition, thereby ensuring the axial sealing between the orbiting plate 1 and the fixed plate 2, avoiding the phenomenon of the orbiting plate 1 overturning, and avoiding the large axial friction between the orbiting plate 1 and the fixed plate 2, generating high friction temperature and adhesive wear, and finally improving the working performance and the service life of the scroll compressor.

[0068] The compression chamber 4 includes a plurality of crescent chambers with changing volumes, and from the center of the fixed plate 2 to the edge of the fixed plate 2, the plurality of crescent chambers can be divided into a high pressure area, a medium pressure area and a low pressure area. One end of the pressure regulating hole 5 is preferably connected to the crescent chamber (compression chamber 4) in the medium pressure area. The low pressure area is prone to insufficient back pressure, and the high pressure area is prone to excessive back pressure.

[0069] As shown in Figure 25 The vertical coordinate is the gradually increasing back pressure chamber pressure from bottom to top, and the horizontal coordinate is the gradually increasing working condition from left to right (the pressure of the compression chamber gradually increases), and the horizontal coordinate can also be the rotation frequency of the orbiting plate, which is only used as an example to illustrate the change of the working condition.

[0070] FromFigure 25 It can be clearly concluded that as the operating conditions increase, the pressure output from the compression chamber increases. The pressure of the back pressure chamber of the existing (non-adjustable medium-pressure) compressor under intermediate refrigeration, nominal refrigeration and standard conditions is significantly higher than that of the back pressure chamber under intermediate refrigeration, nominal refrigeration and standard conditions of the present application.

[0071] Preferred, such as Figures 2-3 As shown, the pressure regulating hole 5 includes a first hole 202 and a second hole 302. When the first hole 202 is disposed on the stationary plate 2, the second hole 302 is disposed on the moving plate 1, and the first groove 201 is disposed on the first end face. When the first hole 202 is disposed on the moving plate 1, the second hole 302 is disposed on the stationary plate 2, and the first groove 201 is disposed on the second end face. The inlet of the second hole 302 is an air inlet 301.

[0072] The rotating block 6 is provided with an adjustment hole. The inlet of the adjustment hole is always connected to the first hole 202, and the outlet of the adjustment hole is located on the end face of the rotating block 6 near the second hole 302.

[0073] On the projection of the stationary disk 2 in the axial direction and within one rotation cycle of the moving disk 1, the rotation of the rotating block 6 can adjust the minimum overlapping area between the outlet of the adjusting hole and the air inlet 301, or the rotation of the rotating block 6 can adjust the duration of the disconnection between the outlet of the adjusting hole and the air inlet 301.

[0074] The first hole 202 is set on the stationary plate 2, and the first groove 201 is also set on the stationary plate 2. Since the stationary plate 2 is stationary, it is convenient for the rotating block 6 to rotate, so that the rotating block 6 can rotate stably. Option 2: The first hole 202 is set on the moving plate 1, and the first groove 201 is also set on the moving plate 1. Since the moving plate 1 is set below the stationary plate 2, the second end face faces upward, and the opening of the first groove 201 also faces upward, thus facilitating the installation of the rotating block 6.

[0075] The outlet of the regulating hole is located on the end face of the rotating block 6 near the second hole 302. The rotation of the rotating disk 1 causes a periodic change in the connection between the outlet of the regulating hole and the air inlet 301. By utilizing this periodic change, in conjunction with controlling the rotation of the rotating block 6, the pressure rise of the back pressure chamber 3 is prevented from being too large under high-frequency conditions, and the pressure drop of the back pressure chamber 3 is prevented from being too rapid under low-frequency conditions. In this way, the control structure for the minimum connection area and connection time of the pressure regulating hole 5 is relatively simple and convenient, facilitating production, installation, and subsequent maintenance.

[0076] Preferred, such as Figures 4-7As shown in the projection of the axial direction of the static disc 2, the outlet end of the adjusting hole is a waist-shaped hole 605, the center of the waist-shaped hole 605 coincides with the rotation center of the rotating block 6; the maximum radius of the movement track of the gas inlet port 301 is R1, the length of the short side of the waist-shaped hole 605 is H1, and the length of the long side of the waist-shaped hole 605 is H2.

[0077] The distance L1 between the center of the movement track of the gas inlet port 301 and the center of the waist-shaped hole 605 is greater than or equal to R1+0.5H1 and less than R1+0.5H2.

[0078] The outlet end of the adjusting hole is a waist-shaped hole 605, which facilitates the communication between the inlet and the outlet of the adjusting hole and facilitates processing.

[0079] The relative position relationship between the waist-shaped hole 605 movement or the second hole 302 movement is certain, and the position relationship between the gas inlet port 301 and the waist-shaped hole 605 is changed.

[0080] By L1 being greater than or equal to R1+0.5H1, it is avoided that the gas inlet port 301 is always in communication with the waist-shaped hole 605 in one rotation cycle of the dynamic disc 1; by L1 being less than R1+0.5H2, it is avoided that the waist-shaped hole 605 cannot always be in communication with the gas inlet port 301 in one rotation cycle of the dynamic disc 1.

[0081] By L1 being greater than or equal to R1+0.5H1 and less than R1+0.5H2, the rotating block 6 rotation can change the communication area between the waist-shaped hole 605 and the gas inlet port 301, and the communication time length between the waist-shaped hole 605 and the gas inlet port 301 in one cycle of the dynamic disc 1, thereby ensuring that the gas pressure in the back pressure cavity 3 will not be too high or too low. Taking the case that the second hole 302 is arranged on the dynamic disc 1 as an example, the movement track of the gas inlet port 301 is a ring (the dashed ring in Figures 3-6 ), and the description is made (referring to Figures 4-7 ), Figure 3 , the waist-shaped hole 605 completely covers the movement track of the gas inlet port 301 in the low-frequency light working condition, at this time, the communication area between the gas inlet port 301 and the waist-shaped hole 605 is the largest, with the working condition of the scroll compressor rising (the rotation frequency of the dynamic disc 1 rising), the temperature of the pump body (including the dynamic disc 1 and the static disc 2) rises, and the rotating block 6 rotates forward (clockwise rotation in Figures 3-6 ), Figure 5At the position shown, the rotation of the moving disk 1 causes the communication area between the air inlet 301 and the oblong hole 605 to change periodically (the air inlet 301 and the oblong hole 605 can always be connected), thus reducing the minimum communication area between the air inlet 301 and the oblong hole 605 within one rotation cycle of the moving disk 1; when the scroll compressor's operating condition continues to increase to a heavy operating condition (the rotation frequency of the moving disk 1 increases), the pump body temperature also increases, and the rotating block 6 continues to rotate forward. When the rotating block 6 rotates to the position shown... Figure 6 At the position shown, during one rotation cycle of the moving disc 1, the air inlet 301 is only connected to the oblong hole 605 for part of the time (that is, disconnected for part of the time); the rotating block 6 moves from... Figure 6 Rotate to Figure 7 During the process, within one rotation cycle of the moving disc 1, the connection time between the air inlet 301 and the oblong hole 605 gradually shortens; when the pump body temperature is higher,

[0082] Rotating block 6 continues to rotate clockwise, as... Figure 7 As shown, this completely separates the movement trajectory of the air inlet 301 from the oblong orifice 605, at which point the pressure regulating orifice 5 is completely disconnected. Correspondingly, as the operating frequency of the scroll compressor gradually decreases, the rotating block 6 reverses direction (…). Figures 4-7 The movement trajectory of the air inlet 301 (rotating counterclockwise) is opposite to the connection status of the waist-shaped hole 605 and the clockwise rotation of the rotating block 6.

[0083] When the second hole 302 is stationary and the first hole 202 is rotating, the positional relationship between the air inlet 301 and the waist-shaped hole 605 is consistent, which will not be described further.

[0084] like Figure 12 As shown, when the short side length of the oblong hole 605 is less than the outer diameter of the movement trajectory of the air inlet 301, the rotating block 6 rotates, which allows the air inlet 301 to connect with the oblong hole 605 twice and disconnect twice within one rotation cycle of the moving plate 1. This makes the gas pressure in the back pressure chamber 3 more stable, thereby making the axial friction between the moving plate 1 and the stationary plate 2 more stable, which helps to reduce friction and extend the service life of the scroll compressor. At the same time, it also makes the output power of the motor driving the moving plate 1 more stable (reducing or avoiding large fluctuations in motor output), improving the working performance and life of the motor.

[0085] Preferred, such as Figures 8-11 As shown, the outlet of the adjustment hole is a circular hole. On the projection of the stationary disk 2 in the axial direction, the distance between the outlet of the adjustment hole and the rotation center of the rotating block 6 is L2, the distance between the air inlet 301 and the rotation center of the rotating block 6 is L3, the outlet radius of the adjustment hole is R2, and the radius of the movement trajectory of the air inlet 301 is R3.

[0086] L2 and L3 are both greater than 0.

[0087] By making 0 < L2 - L3 < R2 + R3, or 0 < L3 - L2 < R2 + R3, L2 and L3 are both greater than 0, when the rotating block 6 rotates to a preset range, the movement track of the air inlet 301 can always coincide with the outlet part of the adjusting hole; and within the preset range, the positional relationship between the air inlet 301 and the outlet of the adjusting hole changes with the rotation of the rotating block 6.

[0088] For example, refer to the attached drawings Figures 8-11 , the movement track of the air inlet 301 is annular Figures 8-11 (the dashed annular in the figure is the movement track of the air inlet 301), which is described (refer to Figures 8-11 ) that Figure 8 , when the low-frequency light working condition, the air outlet of the adjusting hole completely covers the movement track of the air inlet 301, at this time, the air inlet 301 and the air outlet of the adjusting hole have the maximum communication area, as the working condition of the scroll compressor increases (the rotation frequency of the orbiting scroll 1 increases), the temperature of the pump body (including the orbiting scroll 1 and the fixed scroll 2) increases, the thermal sensitive element 7 (not shown in Figures 8-11 ) is heated and elongated and pushes the rotating block 6 to rotate forward (clockwise in Figures 8-11 ); when the rotating block 6 rotates to the position shown in Figure 9 , the rotation of the orbiting scroll 1 makes the communication area between the air inlet 301 and the air outlet of the adjusting hole change periodically (the air inlet 301 and the air outlet of the adjusting hole can always communicate), so that the minimum communication area between the air inlet 301 and the air outlet of the adjusting hole is reduced in one rotation period of the orbiting scroll 1; when the working condition of the scroll compressor continues to increase to the heavy working condition (the rotation frequency of the orbiting scroll 1 increases), the temperature of the pump body also increases, the elongation of the thermal sensitive element 7 makes the rotating block 6 continue to rotate forward, when the rotating block 6 rotates to the position shown in Figure 10 , the air inlet 301 only communicates with the air outlet of the adjusting hole for part of the time (i.e. part of the time is disconnected) in one rotation period of the orbiting scroll 1; when the rotating block 6 rotates from Figure 10 to Figure 11 , the communication time of the air inlet 301 and the air outlet of the adjusting hole gradually shortens in one rotation period of the orbiting scroll 1; when the temperature of the pump body is higher, the thermal sensitive element 7 pushes the rotating block 6 to continue to rotate forward, so that the movement track of the air inlet 301 is completely separated from the air outlet of the adjusting hole, at this time, the pressure regulating hole 5 is completely disconnected. Correspondingly, when the working frequency of the scroll compressor gradually decreases, the rotating block 6 reverses (counterclockwise in Figures 8-11 ), the communication status of the movement track of the air inlet 301 and the air outlet of the adjusting hole is opposite to that when the rotating block 6 rotates forward.

[0089] Preferably, as shown in Figures 19-21As shown, the side wall of the first groove 201 is provided with a mounting groove, and a strip-shaped thermal element 7 is arranged in the mounting groove. The first end of the thermal element 7 is fixedly connected in the mounting groove, the second end of the thermal element 7 is connected to the rotating block 6, and the distance between the extension line of the thermal element 7 in the length direction and the rotating axis of the rotating block 6 is greater than 0.

[0090] The thermal element 7 can be elongated with the increase of temperature and shortened with the decrease of temperature. The thermal element 7 is made of a thermal material which has the property of thermal expansion and contraction. The distance between the extension line of the thermal element 7 in the length direction and the rotating axis of the rotating block 6 is greater than 0, so that the force when the thermal element 7 is elongated or shortened does not pass through the axis of the rotating block 6, and the rotating block 6 can be pushed to rotate.

[0091] The thermal element 7 is elongated to drive the rotating block 6 to rotate forward, and the thermal element 7 is shortened to drive the rotating block 6 to rotate reversely. The rotating block 6 is rotated by the thermal element 7, and the on-off or off duration (communication duration) of the pressure regulating hole 5 is adjusted by the rotation of the rotating block 6. The rotating angle and rotating direction of the rotating block 6 are directly adjusted by the thermal element 7, the communication area or off duration of the pressure regulating hole 5 is effectively adjusted, and the pressure of the back pressure cavity 3 is effectively and timely adjusted, which is beneficial to the stable operation of the compressor.

[0092] Preferably, as shown in the drawings, Figures 14-17 As shown, the second end of the thermal element 7 is provided with a connecting head 701, the side wall of the rotating block 6 is recessed to form a second groove 601, the two opposite side walls of the second groove 601 are provided with sliding rails, and the connecting head 701 is slidably connected with the sliding rails.

[0093] The second groove 601 is arranged, the thermal element 7 is slidably connected with the sliding rails in the second groove 601 through the connecting head 701, the part of the thermal element 7 cooperating with the rotating block 6 is located in the second groove 601, the outer circumferential surface of the rotating block 6 can be in close sliding contact with the inner circumferential surface of the first groove 201, the sealing property between the rotating block 6 and the first groove 201 is ensured, the gas discharged from the compression cavity 4 is prevented from leaking between the rotating block 6 and the first groove 201, the pressure in the back pressure cavity 3 is ensured, and the loss of the gas amount in the compression cavity 4 is reduced, which is beneficial to improving the compression efficiency of the scroll compressor.

[0094] Preferably, as shown in the drawings, Figures 16-18 As shown, the two opposite side walls of the second groove 601 are provided with a sliding rod 602, the sliding rod 602 is provided with a T-shaped groove 603, and the connecting head 701 is arranged in the T-shaped groove 603.

[0095] And / or, the distance between the two side walls opposite to the second groove 601 is W, the maximum length of the thermal sensitive element 7 is L, W≥2.3L.

[0096] By setting the slide rod 602, setting the T-shaped groove 603 on the slide rod 602, and setting the connecting head 701 in the T-shaped groove 603, the thermal sensitive element 7 can be connected with the rotating block 6 in a sliding manner, so that the thermal sensitive element 7 can drive the rotating block 6 to rotate forward and reverse more stably, which is beneficial to improve the stability and agility of the adjustment of the pressure in the back pressure cavity 3.

[0097] Mounting holes can be set on the two opposite side walls of the second groove 601, the slide rod 602 is inserted into the mounting holes, and the T-shaped groove 603 faces the thermal sensitive element 7.

[0098] When the scroll compressor is in a low frequency and light load, the position of the thermal sensitive element 7 is as shown in Figure 20 When the scroll compressor is in a high frequency and heavy load, the position of the thermal sensitive element 7 is as shown in Figure 21 At this time, the thermal sensitive element 7 drives the rotating block 6 to rotate counterclockwise (here, the counterclockwise is limited to the orientation shown in Figure 19 、 Figure 20 and Figure 21 a certain angle.

[0099] Through computer simulation, by making W≥2.3L, the thermal sensitive element 7 can drive the rotating block 6 to rotate the required angle when it is heated and expanded, which avoids the interference of the side wall of the second groove 601 to the thermal sensitive element 7.

[0100] Preferably, as shown in Figures 2-3 the bottom surface of the groove is a first sealing surface, and the rotating block 6 is provided with a second sealing surface opposite to the first sealing surface.

[0101] The pressure regulating hole 5 includes a sealing hole 3021 opening to the first sealing surface, the second sealing surface is provided with a connecting pipe 604, the adjusting hole includes an inner hole of the connecting pipe 604, the axis of the connecting pipe 604 coincides with the axis of the rotating block 6, and the connecting pipe 604 can be inserted into and rotated in the sealing hole 3021.

[0102] The first sealing surface and the second sealing surface improve the sealing between the rotating block 6 and the first groove 201.

[0103] By inserting the connecting pipe 604 into the sealing hole 3021, when the rotating block 6 rotates, the connecting pipe 604 limits the rotating block 6 in the radial direction, which ensures the sealing between the outer circumferential surface of the rotating block 6 and the inner circumferential surface of the first groove 201; at the same time, it also avoids the phenomenon of deflection in the radial direction of the rotating block 6 in rotation, which improves the stability of the rotation of the rotating block 6.

[0104] Preferably, as shown in the drawings, a first baffle plate 801 is arranged in the sealing hole 3021, and the first baffle plate 801 closes part of the sealing hole 3021; a second baffle plate 802 is arranged on the end face of the end of the connecting pipe 604 away from the rotating block 6, and the second baffle plate 802 closes part of the inner hole of the connecting pipe 604. Figures 22-24

[0105] The plate face of the first baffle plate 801 facing the second baffle plate 802 is sealingly abutted against the plate face of the second baffle plate 802 facing the first baffle plate 801.

[0106] The first baffle plate 801 closes part of the sealing hole 3021, that is, the sealing hole 3021 is left with a gas passage, which is a first passage 901; the second baffle plate 802 closes part of the inner hole of the connecting pipe 604, that is, the inner hole of the connecting pipe 604 is left with a gas passage, which is a second passage 902.

[0107] The sealing abutment between the first baffle plate 801 and the second baffle plate 802 makes the gas mainly enter the second passage 902 from the first passage 901; in the projection of the axial direction of the rotating block 6, the gas can flow only when the first passage 901 and the second passage 902 partially overlap; the rotation of the rotating block 6 can adjust the connection area of the first passage 901 and the second passage 902, and thus change the flow area of the pressure regulating hole 5, and change the damping size in the pressure regulating hole 5, so as to be beneficial to adjusting the pressure in the back pressure cavity 3.

[0108] The forward rotation of the rotating block 6 reduces the overlapping area of the first passage 901 and the second passage 902, and correspondingly, the reverse rotation of the rotating block 6 increases the overlapping area of the first passage 901 and the second passage 902; in combination with the positional relationship between the outlet of the adjusting hole and the gas inlet 301, the flow area of the pressure regulating hole 5 is double controlled, and the pressure of the back pressure cavity 3 is more stably adjusted.

[0109] Preferably, the end faces of the vortex teeth of the dynamic disc 1 and the vortex teeth of the static disc 2 are provided with oil grooves.

[0110] The lubricating oil in the compression cavity 4 or the lubricating oil in the high-pressure cavity is introduced into the oil grooves, so as to improve the axial lubricity between the dynamic disc 1 and the static disc 2, reduce thermal deformation, and reduce end face friction and wear.

[0111] The application further provides an air conditioner comprising the scroll compressor.

[0112] The air conditioner has small noise, small vibration and long service life.

[0113] 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. ​

[0114] The above description is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above description is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and variations can be made, and these improvements and variations should be considered as the protection scope of the present application.

Claims

1. A scroll compressor comprising a moving disc (1), a stationary disc (2) and a back pressure cavity (3), the moving disc (1) and the stationary disc (2) forming a compression cavity (4) therebetween, the back pressure cavity (3) being located on both axial sides of the moving disc (1) relative to the compression cavity (4); an end face of the moving disc (1) facing the stationary disc (2) being a first end face, an end face of the stationary disc (2) facing the moving disc (1) being a second end face, the first end face and the second end face abutting each other, characterized in that, The compression cavity (4) and the back pressure cavity (3) are communicated through a pressure regulating hole (5), a first recess (201) is arranged on the first end face or the second end face, the pressure regulating hole (5) is communicated with the first recess (201), and a rotating block (6) is arranged in the first recess (201); In one rotation cycle of the dynamic disc (1), the rotating block (6) can rotate forward with the temperature rising to gradually reduce the minimum communication area of the pressure regulating hole (5) or gradually reduce the communication time length of the pressure regulating hole (5); in one rotation cycle of the dynamic disc (1), the rotating block (6) can rotate reversely with the temperature falling to increase the minimum communication area of the pressure regulating hole (5) or increase the communication time length of the pressure regulating hole (5); A mounting groove is arranged on the side wall of the first recess (201), a strip-shaped thermal sensitive element (7) is arranged in the mounting groove, a first end of the thermal sensitive element (7) is fixedly connected in the mounting groove, a second end of the thermal sensitive element (7) is connected on the rotating block (6), and the distance between the extension line of the thermal sensitive element (7) in the length direction and the rotation axis of the rotating block (6) is greater than 0.

2. The scroll compressor of claim 1, wherein When the first hole (202) is arranged on the static disc (2), the second hole (302) is arranged on the dynamic disc (1), and the first recess (201) is arranged on the first end face; when the first hole (202) is arranged on the dynamic disc (1), the second hole (302) is arranged on the static disc (2), the first recess (201) is arranged on the second end face, and the inlet of the second hole (302) is the air inlet (301); An adjusting hole is arranged on the rotating block (6), the inlet of the adjusting hole is always communicated with the first hole (202), and the outlet of the adjusting hole is located on the end face of the rotating block (6) close to the second hole (302); In the projection of the static disc (2) in the axial direction and in one rotation cycle of the dynamic disc (1), the rotation of the rotating block (6) can adjust the minimum overlapping area of the outlet of the adjusting hole and the air inlet (301), or the rotation of the rotating block (6) can adjust the time length of the disconnection of the outlet of the adjusting hole and the air inlet (301).

3. The scroll compressor of claim 2, wherein, In the projection of the static disc (2) in the axial direction, the outlet end of the adjusting hole is a waist-shaped hole (605), the center of the waist-shaped hole (605) coincides with the rotation center of the rotating block (6); the maximum radius of the movement track of the air inlet (301) is R1, the length of the short side of the waist-shaped hole (605) is H1, and the length of the long side of the waist-shaped hole (605) is H2; The distance L1 between the center of the movement track of the air inlet (301) and the center of the waist-shaped hole (605) is greater than or equal to R1+0.5H1 and less than R1+0.5H2.

4. The scroll compressor of claim 2, wherein The outlet of the adjusting hole is a circular hole, and the distance between the outlet of the adjusting hole and the rotation center of the rotating block (6) in the projection of the axial direction of the fixed disc (2) is L2, the distance between the air inlet (301) and the rotation center of the rotating block (6) is L3, the radius of the outlet of the adjusting hole is R2, and the radius of the movement track of the air inlet (301) is R3. Then, 0 < L2-L3 < R2+R3, or 0 < L3-L2 < R2+R3, and L2 and L3 are greater than 0.

5. The scroll compressor of claim 1, wherein The second end of the thermal element (7) is provided with a connecting head (701), the side wall of the rotating block (6) is recessed to be provided with a second groove (601), the second groove (601) is provided with a sliding rail between the opposite two side walls, and the connecting head (701) is in sliding connection with the sliding rail.

6. The scroll compressor of claim 5, wherein, The second groove (601) is provided with a sliding rod (602) between the opposite two side walls, the sliding rod (602) is provided with a T-shaped groove (603), and the connecting head (701) is arranged in the T-shaped groove (603). And / or, the distance between the opposite two side walls of the second groove (601) is W, the maximum extension or shortening amount of the length of the thermal element (7) is L, and W is greater than or equal to 2.3L.

7. The scroll compressor of claim 3, wherein The bottom surface of the groove is a first sealing surface, and the rotating block (6) is provided with a second sealing surface opposite to the first sealing surface. The pressure regulating hole (5) comprises a sealing hole (3021) leading to the first sealing surface, the second sealing surface is provided with a connecting pipe (604), the adjusting hole comprises an inner hole of the connecting pipe (604), the axis of the connecting pipe (604) coincides with the axis of the rotating block (6), and the connecting pipe (604) can be inserted into and rotated in the sealing hole (3021).

8. The scroll compressor of claim 7, wherein, The sealing hole (3021) is provided with a first baffle (801), and the first baffle (801) closes part of the sealing hole (3021); the end face of the end of the connecting pipe (604) away from the rotating block (6) is provided with a second baffle (802), and the second baffle (802) closes part of the inner hole of the connecting pipe (604); The plate surface of the first baffle (801) facing the second baffle (802) is in sealing abutment with the plate surface of the second baffle (802) facing the first baffle (801).

9. The scroll compressor of any one of claims 1-8, wherein, The end faces of the vortex teeth of the orbiting disc (1) and the vortex teeth of the fixed disc (2) are provided with oil grooves.

10. An air conditioner characterized by comprising: The scroll compressor comprises the orbiting disc (1) and the fixed disc (2).

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