A liquid separator, compressor and air conditioning system

Abstract

The application provides a distributor, a compressor and an air conditioning system. The distributor comprises a straight pipe and an oil return valve plate. The straight pipe is arranged in a distributor shell, and a low-position oil return hole is arranged on the side wall of the straight pipe. The oil return valve plate is arranged in the air inlet channel of the straight pipe in a deformable manner. The first end of the oil return valve plate is connected with the inner wall of the straight pipe, and the second end of the oil return valve plate is opened or closed under the pushing of the refrigerant. According to the operating frequency of the compressor, the state of the oil return valve plate is changed with the suction amount caused by the frequency, so as to adjust the number of oil return holes of the distributor and adjust the oil return amount.

Description

TECHNICAL FIELD

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

[0002] Small compressors are generally provided with a distributor at the suction port. The working principle is that, due to the difference in density between oil droplets / liquid droplets and refrigerant vapor, when the mixed gas flows through the distributor with a large diameter, the flow rate is reduced by using the suddenly enlarged passage area, the flow direction is changed, and the filter screen and other measures are used to make the oil liquid settle at the bottom of the distributor. A certain number of oil return holes are provided at the bottom of the gas outlet pipe of the distributor to allow the oil liquid to slowly flow into the cylinder along with the suction of the compressor. It is difficult to set the number of oil return holes of the compressor, mainly because the following problems need to be considered: the number of oil return holes needs to be set considering the high and low frequencies of the compressor. When the compressor operates at a low frequency, too much refrigeration oil flows back from the distributor to the pump body, which causes the actual compression of the refrigeration medium in the compression chamber to be small, affecting the capacity of the compressor. In addition, since the refrigeration oil is incompressible, too much refrigeration oil entering the compressor chamber will exacerbate the low-frequency rattling sound. When the compressor operates at a high frequency, the wear of the pump body parts is intensified, and the refrigeration oil needs to be kept lubricated. The oil return demand of the distributor when the compressor operates at a high frequency is greater than that when the compressor operates at a low frequency.

[0003] The distributor currently used by the compressor cannot change the number of oil return holes to ensure the required amount of oil return, which can easily cause noise when the compressor operates at a low frequency, and the reliability of the compressor cannot be satisfied when the compressor operates at a high frequency. It is difficult to adjust the amount of oil return of the distributor. SUMMARY

[0004] The present application provides a distributor, a compressor and an air conditioning system. The distributor can adjust the oil return capacity according to the high and low frequencies of the compressor, and can solve the problem that the number of oil return holes of the existing distributor is fixed and cannot meet the different oil return requirements of the compressor when operating at high and low frequencies.

[0005] The present application provides a distributor, which comprises a straight pipe and an oil return valve piece. The straight pipe is arranged in a distributor housing, and the side wall of the straight pipe is provided with a low-position oil return hole. The oil return valve piece is deformably arranged in the air inlet channel of the straight pipe, the first end of the oil return valve piece is connected with the inner wall of the straight pipe, and the second end of the oil return valve piece is opened or closed under the pushing of the refrigerant.

[0006] In some embodiments, the oil return valve piece is arranged in the air inlet channel of the straight pipe, and the two sides of the oil return valve piece and the inner wall of the straight pipe form a first shunt and a second shunt, respectively.

[0007] In some embodiments, the oil return valve piece includes a center contact piece and first and second connecting pieces arranged at both ends of the center contact piece, the first connecting piece being connected to the straight pipe at an end away from the center contact piece, and the second connecting piece being opened or closed to the low-position oil return hole under the pushing of the refrigerant at an end away from the center contact piece.

[0008] In some embodiments, the center contact piece has a circular cross section, and a diameter of the center contact piece is smaller than a diameter of the straight pipe.

[0009] In some embodiments, the second connecting piece has a blocking piece for closing the low-position oil hole, and a length of the blocking piece is greater than a hole diameter of the low-position oil return hole.

[0010] In some embodiments, the straight pipe side wall is provided with a high-position oil return hole in communication with the gas inlet channel, and the high-position oil return hole and the low-position oil return hole are arranged in sequence along a refrigerant flow direction.

[0011] In some embodiments, the high-position oil return hole and the low-position oil return hole are at least one in number, respectively.

[0012] In some embodiments, the straight pipe is arranged on a central axis of the distributor housing, and the straight pipe is provided with a gas inlet pipe and a gas outlet pipe at two ends thereof, respectively.

[0013] In some embodiments, the high-position oil return hole is arranged at a middle lower portion in a height direction of the straight pipe, and the low-position oil return hole is arranged at a lower portion in the height direction of the straight pipe and close to the gas outlet pipe.

[0014] A compressor includes the above-described distributor.

[0015] An air conditioning system includes the above-described compressor.

[0016] The present application provides a distributor, a compressor and an air conditioning system, which have the following beneficial effects:

[0017] When the compressor is operated at a low frequency, the oil return valve piece covers the low-position oil return hole, thereby reducing the oil inlet amount, and the low oil amount also reduces the operation noise of the compressor; when the compressor is operated at a high frequency, the oil return valve piece is deformed, so that the low-position oil return hole is in communication with the gas inlet channel, the oil inlet amount is increased to ensure the lubrication of the compressor, and the reliability of the compressor is improved. The present application can change the state of the oil return valve piece according to the change of the operating frequency of the compressor and the change of the suction amount caused thereby, so as to adjust the number of oil return holes of the distributor and adjust the oil return amount. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0019] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present application can produce and the purposes that the present application can achieve, should still fall within the scope of the technical content disclosed by the present application.

[0020] Figure 1 Structure schematic diagram of the liquid distributor of the embodiment of the present application;

[0021] Figure 2 Structure schematic diagram of the embodiment of the present application when the low-position oil return hole is closed;

[0022] Figure 3 Structure schematic diagram of the embodiment of the present application when the low-position oil return hole is opened;

[0023] Figure 4 Structure schematic diagram of the oil return valve sheet of the embodiment of the present application;

[0024] Figure 5 Structure schematic diagram of the oil return valve sheet of the embodiment of the present application; Figure 1 Detail enlarged view of A in FIG. 5;

[0025] Figure 6 Refrigeration cycle diagram of the embodiment of the present application.

[0026] The reference signs are represented as:

[0027] 1 - straight pipe; 101 - air inlet channel; 2 - oil return valve sheet; 201 - central contact sheet; 202 - first connecting sheet; 203 - second connecting sheet; 204 - plugging sheet; 3 - liquid distributor shell; 401 - low-position oil return hole; 402 - high-position oil return hole; 501 - first shunt; 502 - second shunt; 601 - air inlet pipe; 602 - air outlet pipe. DETAILED DESCRIPTION

[0028] Clearly, only the embodiments described are merely a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one example embodiment is merely illustrative in nature and is in no way limiting to the application and its applications or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of the present application.

[0029] It should be noted that the terms used herein are merely for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the terms "comprise" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0030] It should be understood that the term "and / or" used herein merely describes an association relationship of associated objects, and 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 " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0031] Unless specifically stated otherwise, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and values set forth herein are not limiting to the scope of the present application. It should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the application. In all examples shown and discussed herein, any specific value should be interpreted as merely illustrative, and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0033] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0034] In addition, it needs to be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it cannot be understood as a limitation on the scope of protection of the present application.

[0035] The function of the oil return hole is that in the compressor refrigeration cycle, the mixture of refrigerant and refrigeration oil flows from the inlet of the distributor, enters the compression chamber of the pump body assembly after being separated and filtered, and is discharged from the exhaust port of the compressor after the compression is completed. After the mixture of refrigerant and refrigeration oil is separated in the distributor, the refrigeration oil is accumulated at the bottom of the distributor and does not directly enter the compression chamber of the pump body, which can effectively prevent the refrigeration oil from directly entering the compression chamber of the pump body, causing liquid accumulation in the compressor and resulting in damage to the pump body parts. However, during the operation of the compressor, the oil at the bottom of the compressor will continuously flow out of the compressor and enter the system, and finally enter the bottom of the distributor, so the distributor is provided with an oil return hole to allow the refrigeration oil to return to the compressor, avoiding the lack of oil in the compressor due to the lack of oil in the compressor. However, the oil return directly flows into the compression chamber of the pump body, and the amount of oil returned by all the refrigeration oil needs to be controlled.

[0036] For reference Figures 1 to 3As shown, according to the embodiment of the present application, a distributor is provided, comprising a straight pipe 1 and an oil return valve plate 2; the straight pipe 1 is arranged in a distributor housing 3, and a low-position oil return hole 401 is arranged on the side wall of the straight pipe 1; the oil return valve plate 2 is arranged in the air inlet channel 101 of the straight pipe 1 in a deformable manner, the first end of the oil return valve plate 2 is connected with the inner wall of the straight pipe 1, and the second end of the oil return valve plate 2 opens or closes the low-position oil return hole 401 under the pushing of the refrigerant. The embodiment can change the state of the oil return valve plate 2 according to the change of the operating frequency of the compressor and especially the change of the suction amount, so as to adjust the number of the oil return holes of the distributor and adjust the oil return amount.

[0037] In the embodiment, when the compressor operates at a low frequency, the amount of refrigerant flowing back to the pump body is small, the suction amount of the pump body is small, the refrigerant inlet amount is small, the capacity of the pump body is limited, and too much refrigerant oil cannot be compressed, which easily causes the separation of the roller and the sliding vane, resulting in the click sound when the compressor operates at a low frequency. Therefore, a small amount of oil return of the distributor is needed when the compressor operates at a low frequency. At this time, the suction amount of the pump body is small, the air inlet pressure in the air inlet channel 101 is small, and the pushing force of the refrigerant is not enough to deform the oil return valve plate 2. At this time, the low-position oil return hole 401 is in a closed state. When the compressor operates at a high frequency, the suction amount of the pump body is large, the air inlet amount of the distributor is increased, the pressure in the air inlet channel 101 is large, the oil return valve plate 2 is deformed in the direction of the refrigerant flow under the pushing force of the refrigerant, the low-position oil return hole 401 is in an open state, the low-position oil return hole 401 is communicated with the air inlet channel 101, and the amount of refrigerant oil flowing back to the pump body of the compressor is increased. The amount of refrigerant oil needed when the compressor operates at a high frequency is more than that when the compressor operates at a low frequency, so that the parts can be fully lubricated when the compressor operates at a high frequency, and the reliability of the compressor is improved.

[0038] For reference Figure 4 As shown, the oil return valve plate 2 is arranged in the air inlet channel 101 of the straight pipe 1, and the first and second split channels 501 and 502 are respectively formed between the two sides of the oil return valve plate 2 and the inner wall of the straight pipe 1. The oil return valve plate 2 can be deformed according to the operating frequency, and the gap between the oil return valve plate 2 and the inner wall of the straight pipe 1 affects the refrigerant flow amount. Since the air inlet channel 101 is always in a flow state, the size of the first and second split channels 501 and 502 can be reasonably set to further adjust the pressure in the air inlet channel 101 under the premise of ensuring that the oil return valve plate 2 can be deformed.

[0039] Specifically, the oil return valve plate 2 comprises a center contact plate 201 and first and second connecting plates 202 and 203 arranged at the two ends of the center contact plate 201, the end of the first connecting plate 202 away from the center contact plate 201 is connected with the straight pipe 1, and the end of the second connecting plate 203 away from the center contact plate 201 opens or closes the low-position oil return hole 401 under the pushing of the refrigerant.

[0040] In the embodiment, the first connecting piece 202 is fixedly connected with the inner wall of the straight pipe 1. When the compressor is in high-frequency operation, the suction volume of the pump body increases, the intake volume also increases, the pressure in the intake passage 101 increases, the refrigerant pushes the oil return valve piece 2 to deform in the direction of refrigerant flow, the second connecting piece 203 is offset at a certain angle relative to the low-position oil return hole 401, so that the low-position oil return hole 401 is communicated with the intake passage 101. The assembly mode of the oil return valve piece 2 and the straight pipe 1 is simple, the compressor complete machine is assembled according to the conventional process, when the distributor is processed, the oil return valve piece 2 is fixed at the outer end of the straight pipe 1 by using a height limiting tool, the oil return valve piece 2 and the straight pipe 1 are connected by resistance welding, the oil return valve piece 2 can be stamped by using a die, the part processing is simple, the assembly is simple, and the deformation of the oil return valve piece 2 is adjusted according to the high-frequency and low-frequency operation state of the compressor. Without affecting the normal intake, the deformation mode also does not need to apply external force.

[0041] Specifically, the cross section of the center contact piece 201 is circular, the cross section length and width of the first connecting piece 202 and the second connecting piece 203 are both smaller than the diameter of the center contact piece 201. This structure not only can ensure that the oil return valve piece 2 has a certain strength, but also can make the oil return valve piece 2 deform. The diameter of the center contact piece 201 is smaller than the diameter of the straight pipe 1, the contact area of the center contact piece 201 with the refrigerant is large enough, and the refrigerant can push the oil return valve piece 2 to deform. In other embodiments, the shape of the center contact piece 201 can be changed.

[0042] Further, the second connecting piece 203 has a plugging piece 204 for closing the low-position oil hole, the length of the plugging piece 204 is greater than the hole diameter of the low-position oil return hole 401. When the compressor is in low-frequency operation, the plugging piece 204 can completely cover the low-position oil return hole 401, and the oil intake amount in the intake passage 101 is reduced.

[0043] Referring to Figure 1 As shown in the figure, the straight pipe 1 is vertically arranged on the central axis of the distributor shell 3, the two ends of the straight pipe 1 are respectively provided with an intake pipe 601 and an exhaust pipe 602, the intake pipe 601 extends into the distributor shell 3 and communicates with the top end of the straight pipe 1, one end of the exhaust pipe 602 extends into the distributor shell 3 and communicates with the bottom end of the straight pipe 1, and the other end of the exhaust pipe 602 communicates with the suction hole of the pump body.

[0044] Referring to Figure 5 As shown in the figure, the side wall of the straight pipe 1 is provided with a high-position oil return hole 402 communicated with the intake passage 101, the high-position oil return hole 402 and the low-position oil return hole 401 are arranged in sequence along the direction of refrigerant flow, the high-position oil return hole 402 is arranged at the middle lower part of the straight pipe 1 in the height direction, and the low-position oil return hole 401 is arranged at the lower part of the straight pipe 1 in the height direction and close to the exhaust pipe 602.

[0045] Specifically, the straight pipe 1 is vertically arranged, the high-position oil return hole 402 is located above the low-position oil return hole 401, the high-position oil hole is arranged in the lower part of the distributor shell 3, and oil return is required regardless of low-frequency operation, high-frequency operation or static state of the compressor. The embodiment only controls the oil output, the bottom of the distributor stores the refrigeration oil after the compressor operates, and when the oil accumulates to a certain amount, the compressor is static or low-frequency operation, and the high-position oil hole returns oil. Therefore, the high-position oil return hole 402 is always in an open state, and the opening or closing of the low-position oil return hole 401 is determined by the operating frequency of the compressor and the suction amount caused thereby, so that the number of oil return holes can be changed when the compressor is in low-frequency and high-frequency operation, to meet the demand for different oil return amounts when the compressor is in high-frequency and low-frequency operation, and the different refrigerant flow rates in the intake passage 101 are used to automatically adjust the oil return valve plate 2. The low frequency of the compressor is below 80 Hz, and the high frequency of the compressor is 82 Hz and above, so as to analyze the flow rate in the straight pipe 1 of the distributor, thereby designing the elastic value of the return valve plate, ensuring that the low-position oil return hole 401 can be opened at 82 Hz and above, so as to achieve less oil return when the compressor is in low-frequency operation, and more oil return when the compressor is in high-frequency operation, thereby achieving the purpose of controllable refrigeration oil return.

[0046] Preferably, along the axial direction of the straight pipe 1, the number of high-position oil return holes 402 and low-position oil return holes 401 is at least one, respectively. In other embodiments, multiple high-position oil return holes 402 and low-position oil return holes 401 can be arranged according to the demand for oil return amount, and when multiple low-position oil return holes 401 are arranged, each low-position oil return hole 401 is matched with an oil return valve plate 2.

[0047] Referring to Figure 1 and Figure 6 , a compressor comprises a distributor, and the distributor is the above-mentioned distributor.

[0048] When the compressor is in low-frequency operation, the refrigeration oil discharged from the compressor is small, and the amount of refrigeration oil circulating to the distributor is also small. At this time, as long as a small amount of refrigeration oil is returned from the distributor to the compressor, the compressor will not lack oil. However, the refrigeration oil return amount is a constant value, and when the refrigeration oil return amount meets the oil return amount required by the high-frequency operation of the compressor, too much refrigeration oil will enter the compression chamber of the pump body when the compressor is in low-frequency operation, which will cause the available compressor volume for the refrigerant to be too small, and will greatly affect the actual refrigeration capacity of the compressor.

[0049] When the compressor is in high-frequency operation, the oil discharge rate of the compressor will increase significantly, the amount of refrigeration oil discharged from the compressor will increase, the refrigeration oil in the compressor will decrease, and the amount of refrigeration oil circulating from the system to the distributor will also increase. The low-frequency oil return amount required by the low-frequency operation of the compressor will cause the oil circulation to be blocked, and on the other hand, the wear of the pump body parts will be aggravated when the compressor is in high-frequency operation, and lubrication is also required by the refrigeration oil. Therefore, the amount of oil required by the compressor when it is in high-frequency operation is large.

[0050] The oil distributor in the embodiment can adjust the number of oil return holes according to the operating frequency of the compressor, and the oil return amount of the compressor is also adjusted according to the frequency, so that the oil return rate of the compressor at different frequencies can be met, the oil amount required by the compressor during low-frequency operation can be met, and the noise is reduced, the lubricating capacity of the pump body is enhanced during high-frequency operation of the compressor, and the reliability is improved.

[0051] An air conditioning system comprises the compressor.

[0052] It is easily understood by those skilled in the art that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0053] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only a 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 modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A liquid separator, characterized by The application relates to a straight pipe (1) and an oil return valve plate (2). The straight pipe (1) is arranged in a distributor shell (3), and a low-position oil return hole (401) is arranged on the side wall of the straight pipe (1). The oil return valve plate (2) is arranged in the air inlet channel (101) of the straight pipe (1) in a deformable manner, the first end of the oil return valve plate (2) is connected with the inner wall of the straight pipe (1), and the second end of the oil return valve plate (2) is opened or closed under the pushing of refrigerant. The oil return valve plate (2) is arranged in the air inlet channel (101) of the straight pipe (1), and first and second shunt channels (501 and 502) are respectively formed between the two sides of the oil return valve plate (2) and the inner wall of the straight pipe (1). The oil return valve plate (2) comprises a center contact plate (201) and first and second connecting plates (202 and 203) arranged at the two ends of the center contact plate (201), the first connecting plate (202) is connected with the straight pipe (1) at the end away from the center contact plate (201), and the second connecting plate (203) is opened or closed under the pushing of refrigerant at the end away from the center contact plate (201).

2. The liquid distributor of claim 1, wherein The center contact plate (201) is circular in cross section, and the diameter of the center contact plate (201) is smaller than the diameter of the straight pipe (1).

3. The liquid distributor of claim 2, wherein The second connecting plate (203) is provided with a plugging plate (204) for closing the low-position oil return hole (401), and the length of the plugging plate (204) is greater than the hole diameter of the low-position oil return hole (401).

4. The liquid distributor of claim 2, wherein The side wall of the straight pipe (1) is provided with a high-position oil return hole (402) in communication with the air inlet channel (101), and the high-position oil return hole (402) and the low-position oil return hole (401) are sequentially arranged along the refrigerant flow direction.

5. The liquid distributor of claim 1, wherein The number of the high-position oil return hole (402) and the low-position oil return hole (401) is at least one.

6. The liquid dispenser of claim 5, wherein, The straight pipe (1) is arranged on the central axis of the distributor shell (3), and the straight pipe (1) is provided with an air inlet pipe (601) and an air outlet pipe (602) at the two ends.

7. The liquid dispenser of claim 5, wherein The high-position oil return hole (402) is arranged at the middle lower part of the straight pipe (1) in the height direction, and the low-position oil return hole (401) is arranged at the lower part of the straight pipe (1) in the height direction and close to the air outlet pipe (602).

8. The liquid distributor of claim 7, wherein The distributor is the distributor in any one of claims 1 to 8.

9. A compressor comprising a liquid separator, characterized by The compressor is the compressor in claim 9.

10. An air conditioning system comprising a compressor, characterized by, ​

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