Compressor and heat insulation device thereof

Abstract

The invention relates to the technical field of compressors, in particular to a heat insulation device of a compressor and the compressor comprising the heat insulation device. The heat insulation device comprises a middle partition plate, a shell of the compressor is divided into a high-pressure cavity and a low-pressure cavity by the middle partition plate, and a hollow heat insulation groove is formed in the middle partition plate. The comprehensive heat conductivity coefficient of the middle partition plate can be effectively reduced through the heat insulation groove of the hollow structure, heat transmitted through the middle partition plate is reduced, namely heat transmission between a high-pressure cavity side high-back-pressure area and a low-pressure cavity side low-back-pressure area is reduced, the invalid superheat degree of an air suction refrigerant in the compressor is effectively reduced, and the performance of the compressor is improved. The heat insulation groove is formed in the middle partition plate, the advantages of being simple in structure, easy and convenient to machine and low in cost are achieved, moving parts are not added, and good reliability is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a heat insulation device for a compressor and a compressor comprising the heat insulation device. Background Art

[0002] As the core component of the air-conditioning system, the performance of the compressor plays an important role in the overall performance of the air-conditioning system. The existing rotor compressor uses a middle partition to separate the high and low back pressures in the shell. The shell of the compressor is divided into a high-pressure chamber and a low-pressure chamber by the middle partition. Among them, the low-pressure chamber contains low-pressure and low-temperature refrigerant, and the motor is arranged in the low-pressure chamber. The motor is cooled by the refrigerant in the low-pressure chamber, thereby achieving the purpose of improving the motor efficiency and compressor performance. The pump body (compression structure) is arranged in the high-pressure chamber, and the low-pressure chamber is connected to the suction port of the pump body through the suction hole on the middle partition. The air outlet of the pump body is connected to the high-pressure chamber. The high-pressure chamber contains high-pressure and high-temperature refrigerant compressed by the pump body. Due to the large temperature difference in the working area on both sides of the middle partition, heat is inevitably transferred from the high-pressure back pressure area on the high-pressure chamber side through the middle partition to the low-pressure back pressure area on the low-pressure chamber side, causing the suction refrigerant to produce invalid overheating, resulting in reduced compressor efficiency. Summary of the invention

[0003] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a heat insulation device for a compressor, which can effectively reduce the heat transfer between high and low back pressure areas.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The invention provides a heat insulation device for a compressor, comprising a middle partition plate, wherein the middle partition plate divides a shell of the compressor into a high-pressure chamber and a low-pressure chamber, and a hollow heat insulation groove is arranged inside the middle partition plate.

[0006] Preferably, the insulation groove is filled with an insulator.

[0007] Preferably, the insulation groove is connected to the high-pressure chamber or the low-pressure chamber, and the insulation body is the refrigerant in the high-pressure chamber or the low-pressure chamber.

[0008] Preferably, the insulation is solid.

[0009] Preferably, the outer shell of the pump body placed in the high-pressure chamber has a shaft neck at one end close to the middle partition, and the middle partition is provided with an assembly through hole for connecting the shaft neck, and the assembly through hole is gap-assembled with the shaft neck and sealed.

[0010] Preferably, the heat insulation groove is communicated with the assembly through hole.

[0011] Preferably, the assembly through hole includes a first hole segment, a second hole segment and a third hole segment which are connected in sequence along the axial direction, the first hole segment and the third hole segment are both clearance-matched with the shaft neck, the second hole segment is sealingly matched with the shaft neck, and the heat insulation groove is connected to the first hole segment or the third hole segment.

[0012] Preferably, one end of the middle partition facing the low-pressure chamber extends toward the low-pressure chamber to form a protrusion, and one end of the middle partition facing the high-pressure chamber is recessed toward the low-pressure chamber to form a recess, and the insulation groove is arranged between the protrusion and the recess.

[0013] Preferably, a projection of the protrusion toward the high-pressure chamber side covers the heat insulation groove.

[0014] Preferably, the outer periphery of the heat-insulating groove is inwardly recessed to form a plurality of avoidance portions, and a hollow groove body portion is formed between every two adjacent avoidance portions.

[0015] Preferably, reinforcing ribs are provided in the heat insulation groove.

[0016] The present invention also provides a compressor, comprising the heat insulation device for the compressor as described above.

[0017] Compared with the prior art, the present invention has significant improvements:

[0018] The present invention sets a hollow heat-insulating groove inside the middle partition. The heat-insulating groove with a hollow structure can effectively reduce the comprehensive thermal conductivity of the middle partition, reduce the heat transferred through the middle partition, that is, reduce the heat transfer between the high back pressure area on the high pressure cavity side and the low back pressure area on the low pressure cavity side, effectively reduce the invalid superheat of the suction refrigerant in the compressor, and improve the performance of the compressor. Processing the heat-insulating groove inside the middle partition has the advantages of simple structure, simple processing, and low cost, and no moving parts are added, which has good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 2 is a schematic longitudinal sectional view of a compressor according to an embodiment of the present invention.

[0020] Figure 2 It is a schematic longitudinal section diagram of an implementation manner of a partition plate in a heat insulation device of a compressor according to an embodiment of the present invention.

[0021] Figure 3 It is a schematic longitudinal section diagram of another implementation manner of a partition plate in a heat insulation device of a compressor according to an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the appearance of a partition plate in a heat insulation device of a compressor according to an embodiment of the present invention.

[0023] Figure 5 It is a schematic cross-sectional view of a partition plate in a heat insulation device of a compressor according to an embodiment of the present invention.

[0024] The reference numerals are described as follows:

[0025] 1 Middle partition

[0026] 1a Protrusion

[0027] 1b Depression

[0028] 101 Air intake

[0029] 102 Pump housing connection hole

[0030] 103 Shell connection hole

[0031] 10 Insulation tank

[0032] 11 Assembly through hole

[0033] 111 First hole section

[0034] 112 Second hole section

[0035] 113 The third hole section

[0036] 12 Avoidance

[0037] 13. Tank

[0038] 14 Reinforcement

[0039] 2 High pressure housing

[0040] 20 High pressure chamber

[0041] 201 Exhaust Hole

[0042] 3 Low pressure housing

[0043] 30 Low pressure chamber

[0044] 301 Air Inlet DETAILED DESCRIPTION

[0045] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0049] like Figures 1 to 5 The figure shows an embodiment of the heat insulation device for the compressor provided by the present invention.

[0050] See also Figure 1 The heat insulation device of the compressor of this embodiment includes a middle partition 1, which divides the shell of the compressor into a high-pressure chamber 20 and a low-pressure chamber 30. The shell of the compressor includes a high-pressure shell 2 and a low-pressure shell 3, and the middle partition 1 is fastened to the high-pressure shell 2 and the low-pressure shell 3 by bolting. The high-pressure shell 2 and the middle partition 1 surround the high-pressure chamber 20, and the high-pressure chamber 20 is provided with an exhaust hole 201. The low-pressure shell 3 and the middle partition 1 surround the low-pressure chamber 30, and the low-pressure chamber 30 is provided with an air inlet hole 301. The motor of the compressor is placed in the low-pressure chamber 30, and the pump body (compression structure) is placed in the high-pressure chamber 20. A through air intake hole 101 is provided on the middle partition 1, and the air intake hole 101 connects the low-pressure chamber 30 with the air intake port of the pump body, and the air outlet of the pump body is connected to the high-pressure chamber 20. The working refrigerant enters the low-pressure chamber 30 from the air inlet 301 of the low-pressure chamber 30, then enters the pump body through the air inlet 101 on the middle partition 1 and the air inlet of the pump body, is compressed in the pump body and discharged from the air outlet of the pump body into the high-pressure chamber 20, and then discharged from the air outlet 201 of the high-pressure chamber 20. Therefore, both the high-pressure chamber 20 and the low-pressure chamber 30 are filled with refrigerant.

[0051] In this embodiment, a hollow heat-insulating groove 10 is provided inside the middle partition 1. The heat-insulating groove 10 can be formed by hollowing out the inside of the middle partition 1 or by additive manufacturing. The heat-insulating groove 10 with a hollow structure can effectively reduce the comprehensive thermal conductivity of the middle partition 1 and reduce the heat transferred through the middle partition 1, that is, reduce the heat transfer between the high back pressure area on the high-pressure chamber 20 side and the low back pressure area on the low-pressure chamber 30 side, effectively reduce the invalid superheat of the suction refrigerant in the compressor, and improve the performance of the compressor. Processing the heat-insulating groove 10 inside the middle partition 1 has the advantages of simple structure, easy processing, and low cost, and no moving parts are added, so it has good reliability.

[0052] To increase the heat insulation effect, preferably, a heat insulator is filled in the heat insulation groove 10. By filling the heat insulation groove 10 with a heat insulator, the comprehensive thermal conductivity of the middle partition 1 can be further reduced, thereby further reducing the heat transferred through the middle partition 1.

[0053] In a preferred embodiment, the thermal insulator is solid. The solid thermal insulator preferably adopts a plastic material with a low thermal conductivity coefficient, which has a good thermal insulation effect. Preferably, the plastic material with a low thermal conductivity coefficient can be filled into the thermal insulation groove 10 by injection molding, and a solid thermal insulator is obtained after cooling.

[0054] In another preferred embodiment, the heat insulating groove 10 is connected with the high pressure chamber 20 or the low pressure chamber 30, so that the refrigerant in the high pressure chamber 20 or the low pressure chamber 30 can enter the heat insulating groove 10 as a heat insulator, that is, the heat insulator is the refrigerant in the high pressure chamber 20 or the low pressure chamber 30. The heat insulating groove 10 is filled with refrigerant, and since the thermal conductivity of the refrigerant is very small and the flow rate is extremely low or even does not flow, the comprehensive thermal conductivity of the middle partition 1 can be effectively reduced, and the heat transferred through the middle partition 1 can be reduced.

[0055] In this embodiment, the outer shell of the pump body placed in the high-pressure chamber 20 has a neck portion at one end close to the middle partition 1. The outer shell of the pump body may include a cylinder body and a cylinder head. The neck portion is formed on a side of the cylinder head close to the middle partition 1 away from the cylinder body. An assembly through hole 11 is provided on the middle partition 1. The assembly through hole 11 penetrates the middle partition 1 in the axial direction. The assembly through hole 11 is used to connect the neck portion of the pump body outer shell to realize the assembly of the pump body outer shell and the middle partition 1. The assembly through hole 11 is assembled with a clearance of the neck portion of the pump body outer shell and is sealed to ensure that the middle partition 1 separates the high-pressure chamber 20 and the low-pressure chamber 30 from each other.

[0056] Preferably, the heat insulation groove 10 on the middle partition 1 is connected with the assembly through hole 11, and the heat insulation groove 10 can be connected with the high-pressure chamber 20 or the low-pressure chamber 30 through the assembly relationship between the assembly through hole 11 and the axial neck of the pump body shell.

[0057] Combination Figure 2and Figure 3 Preferably, the assembly through hole 11 includes a first hole section 111, a second hole section 112 and a third hole section 113 which are connected in sequence along the axial direction, the first hole section 111 is close to the low-pressure chamber 30 side, and the third hole section 113 is close to the high-pressure chamber 20 side. The axial neck of the pump housing is penetrated by the first hole section 111, the second hole section 112 and the third hole section 113 of the assembly through hole 11, and the first hole section 111 and the third hole section 113 are both clearance-matched with the axial neck of the pump housing, and the second hole section 112 is sealingly matched with the axial neck of the pump housing. The second hole section 112 can be set to have a diameter larger than the diameters of the first hole section 111 and the third hole section 113, and a sealing ring can be embedded in the second hole section 112 to achieve sealing matching between the second hole section 112 and the axial neck of the pump housing. Therefore, there is a gap between the first hole section 111 and the third hole section 113 and the axial neck of the pump housing for the refrigerant to pass through, and the sealing cooperation between the second hole section 112 and the axial neck of the pump housing separates the gaps on both sides. The heat insulation groove 10 on the middle partition 1 is connected with the first hole section 111 or the third hole section 113, so that the heat insulation groove 10 can be connected with the low pressure chamber 30 through the gap between the first hole section 111 and the axial neck of the pump housing, or connected with the high pressure chamber 20 through the gap between the third hole section 113 and the axial neck of the pump housing, that is, the heat insulation groove 10 is connected with the high pressure chamber 20 or the low pressure chamber 30.

[0058] See also Figure 2 In one embodiment, the heat insulation groove 10 is connected with the third hole section 113. At this time, the heat insulation groove 10 is arranged on one side of the middle partition 1 close to the high-pressure chamber 20. The heat insulation groove 10 is connected with the high-pressure chamber 20 through the gap between the third hole section 113 of the assembly through hole 11 and the shaft neck of the pump body shell. The sealing cooperation between the second hole section 112 of the assembly through hole 11 and the shaft neck of the pump body shell separates the heat insulation groove 10 from the low-pressure chamber 30, so that the refrigerant in the high-pressure chamber 20 can be introduced into the heat insulation groove 10, and the refrigerant is filled in the heat insulation groove 10 to form an insulator.

[0059] See also Figure 3 In another embodiment, the heat insulation groove 10 is connected with the first hole section 111. At this time, the heat insulation groove 10 is arranged on one side of the middle partition 1 close to the low-pressure chamber 30. The heat insulation groove 10 is connected with the low-pressure chamber 30 through the gap between the first hole section 111 of the assembly through hole 11 and the shaft neck of the pump body shell. The sealing cooperation between the second hole section 112 of the assembly through hole 11 and the shaft neck of the pump body shell separates the heat insulation groove 10 from the high-pressure chamber 20, so that the refrigerant in the low-pressure chamber 30 can be introduced into the heat insulation groove 10, and the refrigerant is filled in the heat insulation groove 10 to form an insulator.

[0060] Of course, the method for connecting the heat insulation groove 10 with the high-pressure chamber 20 or the low-pressure chamber 30 in this embodiment is not limited to the above structure, and other methods can also be used. For example, a connecting hole can be opened on the end surface of the middle partition 1 facing the high-pressure chamber 20 or the low-pressure chamber 30, and the heat insulation groove 10 is connected with the high-pressure chamber 20 or the low-pressure chamber 30 through the connecting hole.

[0061] In this embodiment, one end of the middle partition 1 facing the low-pressure chamber 30 extends toward the low-pressure chamber 30 to form a protrusion 1a, and one end of the middle partition 1 facing the high-pressure chamber 20 is recessed toward the low-pressure chamber 30 to form a recessed portion 1b, and the recessed portion 1b is matched with one end of the pump body shell provided with a shaft neck. Preferably, the heat insulation groove 10 is provided between the protrusion 1a and the recessed portion 1b. Preferably, the projection of the protrusion 1a toward the high-pressure chamber 20 side covers the heat insulation groove 10, so that the maximum outer peripheral contour of the heat insulation groove 10 is located within the maximum outer peripheral contour of the protrusion 1a.

[0062] See also Figure 4 and Figure 5 In this embodiment, preferably, the heat insulation groove 10 is annular and coaxially arranged with the middle partition 1. The inner periphery of the annular heat insulation groove 10 forms an opening of the heat insulation groove 10 and penetrates the hole wall of the assembly through hole 11, so that the heat insulation groove 10 is connected with the assembly through hole 11.

[0063] Preferably, the outer periphery of the heat-insulating groove 10 is inwardly recessed to form a plurality of avoidance portions 12, and a hollow groove body portion 13 is formed between each two adjacent avoidance portions 12, and all the groove body portions 13 are connected to the opening of the inner periphery of the heat-insulating groove 10, thereby forming a petal-shaped heat-insulating groove 10. A pump shell connecting hole 102 is provided on the middle partition 1, and when the pump shell is assembled with the middle partition 1, the axial neck of the pump shell is penetrated through the assembly through hole 11, and the pump shell is fastened to the pump shell connecting hole 102 by bolts. The heat-insulating groove 10 is set to be petal-shaped, and the pump shell connecting hole 102 can be set on the avoidance portion 12 formed by the recess of the outer periphery of the heat-insulating groove 10, so that the heat-insulating groove 10 can avoid the pump shell connecting hole 102 on the middle partition 1 to avoid refrigerant leakage. Preferably, the air intake hole 101 on the middle partition 1 is also set on the avoidance portion 12 formed by the recess of the outer periphery of the heat-insulating groove 10. In addition, the middle partition 1 is also provided with a shell connection hole 103, and the shell of the compressor (high-pressure shell 2 and low-pressure shell 3) is fastened to the shell connection hole 103 by bolts. The shell connection hole 103 is provided on the outer peripheral edge of the middle partition 1, and is located between the outer periphery of the heat insulation groove 10 and the outer periphery of the middle partition 1, and the heat insulation groove 10 is also arranged to avoid the shell connection hole 103. The outer periphery of the heat insulation groove 10 is recessed to form an avoidance portion 12, which can not only make the heat insulation groove 10 form a petal shape to avoid the pump body shell connection hole 102, the air intake hole 101 and the shell connection hole 103, but also the avoidance portion 12 can play the role of a reinforcing rib, which can increase the structural strength of the middle partition 1.

[0064] In this embodiment, preferably, a reinforcing rib 14 is provided in the heat-insulating groove 10, and the reinforcing rib 14 is located between the inner periphery and the outer periphery of the heat-insulating groove 10. The reinforcing rib 14 connects the two side walls of the heat-insulating groove 10 close to the high-pressure chamber 20 and the low-pressure chamber 30, respectively, and plays a role in supporting and increasing the structural strength in the heat-insulating groove 10, and can increase the overall structural strength of the middle partition 1. Preferably, a reinforcing rib 14 is provided in each groove body portion 13 to ensure uniformity of structural strength.

[0065] In this embodiment, the shape of the heat insulation groove 10 is not limited. The cross-sectional shape of the heat insulation groove 10 is roughly annular, and the outer periphery can be a circle or any polygon with multiple recessed avoidance parts 12. The maximum diameter of the outer periphery of the heat insulation groove 10 can be any suitable diameter within the outer diameter range of the middle partition 1; the longitudinal cross-sectional shape of the heat insulation groove 10 can be rectangular or straight or other shapes. The thickness of the heat insulation groove 10 is less than the thickness of the middle partition 1. In order to ensure the strength of the middle partition 1, the thickness of the heat insulation groove 10 cannot be too large compared with the thickness of the middle partition 1, and the middle partition 1 needs to have a certain wall thickness on both sides of the heat insulation groove 10, so as to ensure that the structural strength of the middle partition 1 meets the working requirements of the compressor. The specific shape and size of the heat insulation groove 10 can be adaptively set according to the shape and internal space of the middle partition 1.

[0066] Based on the heat insulation device for a compressor of the present invention, an embodiment of the present invention further provides a compressor. The compressor of this embodiment includes the heat insulation device for a compressor of the present embodiment.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A heat insulation device for a compressor, characterized in that: The invention comprises a middle partition (1), wherein the middle partition (1) divides the shell of the compressor into a high-pressure chamber (20) and a low-pressure chamber (30), and a hollow heat-insulating groove (10) is provided inside the middle partition (1).

2. The heat insulation device for a compressor according to claim 1, characterized in that: The heat insulation groove (10) is filled with a heat insulation body.

3. The heat insulation device for a compressor according to claim 2, characterized in that: The heat insulation groove (10) is connected to the high-pressure chamber (20) or the low-pressure chamber (30), and the heat insulation body is the refrigerant in the high-pressure chamber (20) or the low-pressure chamber (30).

4. The heat insulation device for a compressor according to claim 2, characterized in that: The thermal insulator is solid.

5. The heat insulation device for a compressor according to claim 1, characterized in that: The outer shell of the pump body disposed in the high-pressure chamber (20) has a shaft neck portion at one end close to the middle partition (1), and the middle partition (1) is provided with an assembly through hole (11) for connecting the shaft neck portion, and the assembly through hole (11) is gap-assembled with the shaft neck portion and is sealed.

6. The heat insulation device for a compressor according to claim 5, characterized in that: The heat insulation groove (10) is communicated with the assembly through hole (11).

7. The heat insulation device for a compressor according to claim 6, characterized in that: The assembly through hole (11) comprises a first hole segment (111), a second hole segment (112) and a third hole segment (113) which are sequentially connected along the axial direction; the first hole segment (111) and the third hole segment (113) are both clearance-matched with the shaft neck portion; the second hole segment (112) is sealingly matched with the shaft neck portion; and the heat insulation groove (10) is connected to the first hole segment (111) or the third hole segment (113).

8. The heat insulation device for a compressor according to claim 1, characterized in that: One end of the middle partition plate (1) facing the low-pressure chamber (30) extends toward the low-pressure chamber (30) to form a protrusion (1a), and one end of the middle partition plate (1) facing the high-pressure chamber (20) is recessed toward the low-pressure chamber (30) to form a recessed portion (1b), and the heat insulation groove (10) is arranged between the protrusion (1a) and the recessed portion (1b).

9. The heat insulation device for a compressor according to claim 8, characterized in that: The projection of the protrusion (1a) toward the high-pressure chamber (20) covers the heat insulation groove (10).

10. The heat insulation device for a compressor according to claim 1 or 9, characterized in that: The outer periphery of the heat-insulating groove (10) is inwardly recessed to form a plurality of avoidance portions (12), and a hollow groove body portion (13) is formed between each two adjacent avoidance portions (12).

11. The heat insulation device for a compressor according to claim 1, characterized in that: A reinforcing rib (14) is provided in the heat-insulating groove (10).

12. A compressor, characterized in that: A heat insulating device for a compressor comprising the heat insulating device as claimed in any one of claims 1 to 11.

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