Dispenser assembly, compressor assembly and air conditioning system

Abstract

This application provides a distributor assembly, a compressor assembly, and an air conditioning system. The distributor assembly includes a distributor fitted around the outer periphery of a housing; the distributor includes an annular dispensing chamber, and a heat insulation layer is disposed between the inner wall of the dispensing chamber and the housing; a pump suction pipe, one end of which is connected to the dispensing chamber, and the other end of which is connected to the suction port. This application increases the thermal resistance of the compressor housing to the inner wall of the annular distributor by providing a heat insulation layer between the annular distributor and the compressor housing, reduces the transfer of high-temperature heat from the compressor housing to the suction gas in the dispensing chamber, reduces suction heat loss, and improves compressor performance.

Description

TECHNICAL FIELD

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

[0002] At present, a small-sized refrigeration compressor is usually provided with a distributor (or a liquid accumulator) for separating liquid in suction gas and controlling liquid into a pump body, so as to avoid liquid compression in a cylinder. A traditional distributor usually adopts a cylindrical structure and is installed beside a compressor shell. This mode brings two problems, one is that a gravity center of the distributor is offset relative to a gravity center of the pump body and a motor, so that the distributor becomes an "amplifier" of vibration noise of the compressor, resulting in an increase in noise of the compressor and a refrigeration system; the other is that the compressor has a large radial size and occupies a large space in the air conditioning system, which is not conducive to miniaturization of an air conditioning outdoor unit.

[0003] In view of the above problems, a related technology proposes a technical scheme of surrounding the distributor around the periphery of the compressor shell, which fully utilizes the peripheral space of the compressor shell and makes the gravity centers of the distributor and the compressor substantially coincide, and has a positive effect on reducing the appearance size of the compressor and improving vibration noise.

[0004] However, in further research and application, it is found that the inner wall of the existing annular distributor coincides with or is integrally designed with the compressor shell, so that the heat of the high-temperature gas in the compressor shell and the motor is directly transmitted to the inner wall of the distributor, resulting in a significant increase in suction temperature, a decrease in actual suction density and flow, and a significant decrease in compressor volumetric efficiency and indicated efficiency, which affects the performance of the compressor.

[0005] Therefore, the compressor with the annular distributor has the technical problems of large suction heat loss and decreased compressor performance. SUMMARY

[0006] Therefore, the present application provides a distributor assembly, a compressor assembly and an air conditioning system, which can solve the problems of large suction heat loss and decreased compressor performance of the compressor with the annular distributor in the prior art.

[0007] In order to solve the above problems, the present application provides a distributor assembly for gas-liquid separation of refrigerant entering a compressor, wherein a suction port is arranged on an outer shell of the compressor; the distributor assembly comprises:

[0008] a distributor, which is sleeved on the outer periphery of the outer shell; the distributor comprises an annular distributor cavity, and a heat insulation layer is arranged between an inner wall of the distributor cavity and the outer shell;

[0009] a pump body suction pipe, one end of which is communicated with the distributor cavity, and the other end of which is communicated with the suction port.

[0010] In some embodiments,

[0011] The thickness of the heat insulation layer is b, and the thickness of the liquid separation cavity is B, and 0.05<b / B<0.3 is satisfied.

[0012] In some embodiments,

[0013] The axial direction of the liquid separation cavity is vertically arranged, and the pump body suction pipe is arranged on the upper outer wall of the liquid separation cavity; and / or the bottom of the liquid separation cavity is communicated with the air suction port through an oil return pipe.

[0014] In some embodiments,

[0015] The upper end surface of the liquid separation cavity is provided with an air suction pipe, and the air suction pipe and the pump body suction pipe are arranged at an angle of β with respect to the center of the liquid separation cavity on the vertical projection surface of the liquid separation cavity, and 120°<β≤180° is satisfied.

[0016] In some embodiments,

[0017] The inner wall and the outer shell are provided with a connecting piece, the liquid separator is fixed to the outer shell through the connecting piece, and the air gap between the inner wall and the outer shell forms the heat insulation layer.

[0018] In some embodiments,

[0019] The connecting piece is an inner protrusion formed by the inward protrusion of part of the inner wall, and the inner protrusion is fixedly connected with the outer shell.

[0020] In some embodiments,

[0021] The connecting piece is provided with a plurality of inner protrusions, and the inner protrusions are uniformly arranged along the circumference of the outer shell.

[0022] In some embodiments,

[0023] The heat insulation layer comprises at least one annularly arranged heat insulation medium, and the heat insulation medium is an infrared reflection layer or a porous heat insulation layer.

[0024] In some embodiments,

[0025] The heat insulation layer is a vacuum cavity, and the vacuum cavity is surrounded by the inner wall, the outer shell, and sealing plates arranged between the inner wall and the outer shell and at both axial ends of the outer shell.

[0026] In some embodiments,

[0027] The vacuum cavity is provided with an annularly arranged anti-radiation plate arranged between the inner wall and the outer shell, and the anti-radiation plate comprises a metal foil plate.

[0028] According to another aspect of the present application, a compressor assembly is provided, comprising the liquid separator assembly as described above.

[0029] According to another aspect of the present application, an air conditioning system is provided, comprising the liquid separator assembly as described above or the compressor assembly as described above.

[0030] The liquid separator assembly according to the present application separates the refrigerant entering the compressor into gas and liquid, and the compressor shell is provided with a suction port; the liquid separator assembly comprises: a liquid separator, which is sleeved on the outer periphery of the shell; the liquid separator comprises an annular liquid separation cavity, and a heat insulation layer is arranged between the inner wall of the liquid separation cavity and the shell; a pump body suction pipe, one end of which is communicated with the liquid separation cavity, and the other end is communicated with the suction port.

[0031] The present application has the following beneficial effects:

[0032] By arranging the heat insulation layer between the annular liquid separator and the compressor shell, the heat transfer thermal resistance of the compressor shell to the inner wall of the annular liquid separator is increased, the transfer of high-temperature heat in the compressor shell to the suction gas in the liquid separation cavity is reduced, the suction heat transfer loss is reduced, and the compressor performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without paying creative labor.

[0034] Figure 1 It is a structural schematic diagram of the compressor assembly of the embodiment of the present application;

[0035] Figure 2 It is a partial enlarged view of one structure in the embodiment of the present application; Figure 1

[0036] Figure 3 It is a partial enlarged view of another structure in the embodiment of the present application; Figure 1

[0037] Figure 4 It is a structural schematic diagram of the axial projection plane of the compressor of the embodiment of the present application;

[0038] Figure 5 It is a partial enlarged view in the embodiment of the present application; Figure 4

[0039] Figure 6 It is an effect diagram of the thickness ratio of the heat insulation layer and the liquid separation cavity in the embodiment of the present application. ​​​

[0040] Reference signs are indicated as:

[0041] 1, housing;

[0042] 2, distributor; 21, upper sealing plate; 22, inner wall; 23, outer wall; 24, lower sealing plate; 25, inner convex part;

[0043] 3, pump body suction pipe;

[0044] 4, heat insulation layer; 41, infrared reflection layer; 42, porous heat insulation layer; 43, vacuum cavity; 44, anti-radiation plate;

[0045] 5, air suction port; 6, air suction pipe; 7, oil return pipe. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0047] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0048] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device is inverted, then the elements described as above other elements or features would now be oriented below the other elements or features. Thus, the examples "above" and "below" can encompass both orientations "above" and "below". The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0049] In addition, it should be noted that the use of "first", "second", and the like words of distinction do not connote any meaning of importance, but are used only to distinguish one element from another. Thus, the words "first", "second", and the like do not connote any meaning of importance, and should not be construed as limiting the scope of the application.

[0050] With reference to the accompanying drawings, Figures 1 to 6 As shown, according to the embodiments of the present application, a distributor assembly separates the gas and liquid of the refrigerant entering a compressor, and the compressor housing 1 is provided with a suction port 5; the distributor assembly comprises:

[0051] A distributor 2 is sleeved on the outer periphery of the housing 1; the distributor 2 comprises an annular distributor cavity, and a heat insulation layer 4 is arranged between the inner wall 22 of the distributor cavity and the housing 1;

[0052] A pump body suction pipe 3 is communicated at one end with the distributor cavity and at the other end with the suction port 5.

[0053] The present application increases the heat transfer resistance of the compressor housing to the inner wall 22 of the annular distributor 2 by arranging the heat insulation layer 4 between the annular distributor 2 and the compressor housing 1, reduces the transfer of high temperature heat in the compressor housing 1 to the suction gas in the distributor cavity, reduces the suction heat transfer loss, and improves the performance of the compressor.

[0054] The arrangement of the heat insulation layer 4 can also block the path of the vibration and noise in the compressor housing 1 to the outside, thereby reducing the noise of the compressor.

[0055] In some embodiments,

[0056] In the radial direction of the housing 1, the thickness of the heat insulation layer 4 is b, and the thickness of the distributor cavity is B, and 0.05 < b / B < 0.3 is satisfied.

[0057] The thickness of the insulation layer 4 and the liquid distribution chamber in the radial direction of the outer shell 1 is limited to ensure good insulation performance. For example... Figure 5 As shown, the average width of the heat insulation layer 4 in the radial direction of the outer shell 1 is set as b, and the average width of the annular liquid distribution cavity in the radial direction of the outer shell 1 is B. When 0.05

[0058] like Figure 6 The curves showing the change in heat transfer from the compressor housing to the annular distributor 2 as a function of the b / B value are shown. When b / B ≤ 0.05, due to the thinness of the insulation layer 4 and its low thermal resistance, the heat transfer decreases rapidly as the b / B value increases. When b / B ≥ 0.3, and the width of the insulation layer 4 is sufficiently large, the heat exchange between the outer shell 1 and the inner wall 22 of the distributor 2 mainly relies on thermal radiation. As the b / B value continues to increase, the thermal resistance of the insulation layer 4 does not increase significantly, and the heat transfer decreases very slowly with b / B.

[0059] In some implementations...

[0060] The liquid separation chamber is vertically oriented, and the pump body suction pipe 3 passes through the upper outer wall 23 of the liquid separation chamber; and / or, the bottom of the liquid separation chamber is connected to the air intake 5 via the oil return pipe 7.

[0061] The pump body suction pipe 3 is inserted into the outer wall 23 of the upper part of the liquid separation chamber, so that the gas is separated from the liquid as much as possible in the liquid separation chamber. This can reduce the liquid from directly entering the pump body suction pipe 3; and the separated liquid can be sent into the air intake port 5 through the oil return pipe 7 to improve the lubrication effect of the pump body components.

[0062] In some implementations...

[0063] The upper end face of the liquid separation chamber is provided with an air suction pipe 6; on the vertical projection plane of the liquid separation chamber, the air suction pipe 6 and the pump body suction pipe 3 are set at an angle relative to the center of the liquid separation chamber, and the angle is set as β, which satisfies 120°<β≤180°.

[0064] Connecting the suction pipe 6 and the discharge pipe—the pump body suction pipe 3—to the upper part or top of the separating chamber, and setting them at an angle β relative to the center of the separating chamber on its vertical projection plane, satisfying 120° < β ≤ 180°, can make the flow within the annular separating chamber more uniform, resulting in lower gas-liquid separation efficiency, flow loss, and heat transfer loss. The optimal choice is 180°. Setting it between 120° and 180° is to consider the actual installation space arrangement; other ranges will lead to severely uneven flow distribution, causing increased flow resistance and increased flow noise.

[0065] In some implementations... ​

[0066] A connector is provided between the inner wall 22 and the outer shell 1, and the liquid dispenser 2 is fixed to the outer shell 1 via the connector; the air gap between the inner wall 22 and the outer shell 1 constitutes the heat insulation layer 4.

[0067] For the installation and fixation of the dispenser 2, a connector with a small contact area can be used to fix the inner wall 22 of the dispenser 2 and the outer shell 1 to reduce heat transfer; that is, the inner wall 22 of the dispenser 2 is not connected to the outer shell 1 except for the connector, so that the dispenser 2 can be fixed.

[0068] In some implementations...

[0069] The connector is configured as an inwardly protruding portion 25 formed by a portion of the inner wall 22 protruding inward, and the inwardly protruding portion 25 is fixedly connected to the outer shell 1.

[0070] The connector can be formed by the inner wall 22 protruding inward to form an inner convex part 25, which is simple to manufacture and reduces the number of parts. The inner convex part 25 protrudes on the wall surface of the outer shell 1 to achieve a fixed connection between the inner convex part 25 and the outer shell 1, such as by welding, threading or interference fit. This will fix the liquid dispenser 2 to the outer shell 1.

[0071] In some implementations...

[0072] The connectors are provided in multiple parts and are evenly arranged along the circumference of the outer shell 1.

[0073] Multiple connectors can be provided, evenly distributed along the circumference of the outer shell 1 to improve the stability of the distributor 2 and the outer shell 1. For example, the inner wall 22 of the upper end and / or lower end of the annular distributor 2 has at least three inner protrusions 25. The inner protrusions 25 are fixed to the outer shell 1 by welding, threading, or interference fit. A gap is provided between adjacent inner protrusions 25 in the circumferential direction so that the heat insulation layer 4 is connected to the external space to form an air heat insulation layer 4.

[0074] In this design, the annular distributor 2 and the outer shell 1 are connected and fixed by at least three inner protrusions 25, which significantly reduces the direct metal-to-metal contact area between the two, reduces heat transfer, and ensures the reliability of the connection. On the other hand, the upper and lower ends of the insulation layer 4 are connected to the outside through gaps. When the compressor is running, the heated air inside the insulation layer 4 rises and flows out from the upper gap, while the cold air enters from the lower gap, forming natural convection. This reduces the heat transfer from the outer shell 1 to the annular cavity while enhancing the heat dissipation of the surface of the outer shell 1.

[0075] In some implementations...

[0076] The heat insulation layer 4 includes at least one annular heat insulation medium, which is an infrared reflective layer 41 or a porous heat insulation layer 42.

[0077] The heat insulation layer 4 can also be configured to have at least one layer of heat insulation medium, which can be an infrared reflective layer 41 or a porous heat insulation layer 42. The infrared reflective layer 41 can be made by spraying resin, nano-ceramics, etc., and the porous heat insulation layer 42 can be made of porous plastic, fiber, aerogel felt, etc.

[0078] Since the outer shell 1 is generally made of steel and has a high temperature, it has a strong infrared radiation capability. The annular liquid separator surrounds the outer shell 1 and has a large radiation absorption ratio. Radiation also becomes an important heat transfer method between the outer shell 1 and the annular liquid separator 2.

[0079] In this embodiment, the infrared reflective layer 41 has a high reflectivity, which can reflect most of the infrared radiation back, thereby reducing radiative heat transfer. The porous heat insulation layer 42 not only reduces the rate of heat transfer, but the porous medium can also absorb the vibration and noise energy from inside the casing, attenuating its outward transmission path and reducing compressor vibration and noise.

[0080] In some implementations...

[0081] The heat insulation layer 4 is configured as a vacuum chamber 43, which is formed by the inner wall 22, the outer shell 1 and the sealing plates disposed between the two at both ends along the axial direction of the outer shell 1.

[0082] The heat insulation layer 4 can also be configured as a vacuum chamber 43 structure, which is formed by the inner wall 22, the outer shell 1 and the sealing plates located between the two along the axial ends of the outer shell 1.

[0083] This embodiment uses a closed heat insulation cavity with a certain degree of vacuum (pressure less than atmospheric pressure). Preferably, the pressure in the heat insulation cavity is below 1 kPa.

[0084] The three basic modes of heat transfer are conduction, convection, and radiation. Both conduction and convection rely on a medium. For air, lower pressure and density result in lower thermal conductivity and convective heat transfer coefficients; therefore, this embodiment can significantly reduce the heat loss from the intake of the annular distributor 2. Furthermore, sound wave transmission also depends on a medium; the vacuum within the closed, insulated cavity effectively blocks the transmission of compressor noise to the outside.

[0085] In some implementations...

[0086] The vacuum chamber 43 is provided with an annularly arranged anti-radiation plate 44, which is located between the inner wall 22 and the outer shell 1; the anti-radiation plate 44 includes a metal foil plate.

[0087] At least one anti-radiation plate 44 is set inside the vacuum chamber 43. The anti-radiation plate 44 can be a metal foil plate. The anti-radiation plate 44 can significantly reduce the heat transfer due to radiation. For example, if the casing and the inner wall 22 of the annular cavity are made of cold-rolled steel plate with an emissivity of about 0.8, the anti-radiation plate 44 can be made of aluminum foil with an emissivity of about 0.05. According to radiation theory, the aluminum foil plate can reduce the heat transfer due to radiation to 1 / 27. This can further significantly reduce the heat loss from the intake of the annular separator 2.

[0088] According to another aspect of this application, a compressor assembly is provided, including the liquid dispenser assembly as described above.

[0089] like Figure 1 As shown, the compressor assembly of this application consists of an exhaust pipe, a housing, a motor, a pump body, an annular separator 2, and lubricating oil. The annular separator 2 consists of an intake pipe 6, an annular cavity, a pump body suction pipe 3, and an oil return pipe 7. The two ends of the oil return pipe 7 are connected to the bottom of the annular cavity and the pump body suction pipe 3, respectively. The separator is surrounded by an upper sealing plate 21, an annular inner wall 22, an annular outer wall 23, and a lower sealing plate 24. The annular separator is fitted around the outer periphery of the housing 1. The two ends of the pump body suction pipe 3 are connected to the upper part of the annular cavity and the pump body working cavity, respectively.

[0090] When the compressor is working, the low-pressure refrigerant enters the annular liquid separator from the suction pipe 6. Due to the sudden drop in flow rate and the change in flow direction, the liquid in the intake air separates and falls to the bottom of the annular liquid separator. The gas enters the compressor working chamber from the pump body suction pipe 3. The motor drives the pump body to rotate, realizing the compression and exhaust of the working chamber. The high-temperature exhaust flows through the motor and is discharged from the compressor through the exhaust pipe.

[0091] Due to the high temperature and high pressure environment inside the outer casing 1 and the heat generated during motor operation, heat is easily transferred to the low-temperature, low-pressure refrigerant inside the annular distributor 2 through the outer casing 1 and the inner wall 22 of the annular distributor 2, resulting in compressor suction overheating. This application provides a heat insulation layer 4 between the inner wall 22 of the annular distributor 2 and the outer casing 1. Since the thermal conductivity of air, the insulation medium, or a vacuum is much lower than that of metals (the outer casing 1 is generally made of materials such as steel, aluminum, or copper), even if the heat insulation cavity is filled with air, it can significantly increase the thermal resistance between the casing and the inner wall 22 of the annular cavity, avoiding the problem of insufficient thermal resistance caused by tight contact or an integral design between the casing and the inner wall 22 of the annular cavity.

[0092] The compressors mentioned above, except for Figure 1 In addition to the rolling piston compressor shown, it is also applicable to various types of positive displacement compressors such as scroll compressors, vane compressors, and rotary cylinder compressors.

[0093] According to another aspect of this application, an air conditioning system is provided, including a distributor assembly as described above or a compressor assembly as described above.

[0094] It will be readily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

[0095] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above description is merely a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A separator assembly for separating a refrigerant entering a compressor into a gas and a liquid, said compressor having a housing (1) with a suction port (5) therein; characterized in that, The distributor assembly comprises: a distributor (2) sleeved on the outer periphery of the shell (1); the distributor (2) comprises an annular distributor cavity, and a heat insulation layer (4) is arranged between the inner wall (22) of the distributor cavity and the shell (1); a pump body suction pipe (3) having one end communicated with the distributor cavity and the other end communicated with the air suction port (5); in the radial direction of the shell (1), the air gap between the inner wall (22) and the shell (1) constitutes the heat insulation layer (4), the thickness of the heat insulation layer (4) is b, the thickness of the distributor cavity is B, and 0.05<b / B<0.3 is satisfied.

2. The distributor assembly according to claim 1, characterized in that: the axial direction of the distributor cavity is vertically arranged, and the pump body suction pipe (3) is arranged through the upper outer wall (23) of the distributor cavity; and / or the bottom of the distributor cavity is communicated with the air suction port (5) through an oil return pipe (7).

3. The distributor assembly according to claim 2, characterized in that: an air suction pipe (6) is arranged on the upper end surface of the distributor cavity; in the vertical projection plane of the distributor cavity, the air suction pipe (6) and the pump body suction pipe (3) are arranged at an angle with respect to the center of the distributor cavity, and the angle is β, which satisfies 120°<β≤180°.

4. The distributor assembly according to any one of claims 1-3, characterized in that: a connecting piece is arranged between the inner wall (22) and the shell (1), and the distributor (2) is fixed to the shell (1) through the connecting piece.

5. The distributor assembly according to claim 4, characterized in that: the connecting piece is an inner protrusion (25) formed by the inward protrusion of part of the inner wall (22), and the inner protrusion (25) is fixedly connected with the shell (1).

6. The distributor assembly according to claim 5, characterized in that: a plurality of connecting pieces are arranged, and the connecting pieces are uniformly arranged along the circumferential direction of the shell (1).

7. The distributor assembly according to any one of claims 1-3, characterized in that: the heat insulation layer (4) comprises at least one annular heat insulation medium, and the heat insulation medium is an infrared reflection layer (41) or a porous heat insulation layer (42).

8. The distributor assembly according to any one of claims 1-3, characterized in that: the heat insulation layer (4) is a vacuum cavity (43), and the vacuum cavity (43) is surrounded by the inner wall (22), the shell (1) and a sealing plate arranged between the inner wall (22) and the shell (1) along the axial direction of the shell (1).

9. The distributor assembly according to claim 8, characterized in that: an annular anti-radiation plate (44) is arranged in the vacuum cavity (43), and the anti-radiation plate (44) is arranged between the inner wall (22) and the shell (1); the anti-radiation plate (44) comprises a metal foil plate.

10. A compressor assembly characterized by, The compressor assembly comprises the distributor assembly according to any one of claims 1-9.

11. An air conditioning system, characterized by, The compressor assembly comprises the distributor assembly according to any one of claims 1-9 or the compressor assembly according to claim 10.

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