Compressor and heat insulation device thereof
By setting a hollow insulation groove inside the middle partition and cooperating with the shaft neck of the pump body shell, the heat transfer problem between the high and low back pressure areas is solved, and the performance and reliability of the compressor are improved.
Patent Information
- Application Number
- CN202422905433.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-27
AI Technical Summary
In existing rotary compressors, heat transfer between high and low back pressure areas causes ineffective overheating of the suction refrigerant, reducing compressor efficiency.
A hollow insulation groove is set inside the middle partition, and can be optionally filled with an insulator or use a refrigerant as an insulator. Heat transfer is reduced through the insulation groove, and the clearance between the middle partition and the axial neck of the pump body shell is matched to achieve communication between the insulation groove and the high and low pressure chambers.
It effectively reduces the comprehensive thermal conductivity of the middle partition, reduces heat transfer, and improves compressor performance. It has a simple structure, low cost and high reliability.
Smart Images
Figure CN223398886U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, 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 an intermediate 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 intermediate 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 refrigerant in the low-pressure chamber is used to cool the motor, thereby achieving the purpose of improving the motor efficiency and compressor performance. The pump body (compression structure) is arranged in the high-pressure chamber. The low-pressure chamber is connected to the air intake of the pump body through the air intake hole on the intermediate 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 between the working areas on both sides of the intermediate partition, heat is inevitably transferred from the high-back pressure area on the high-pressure chamber side through the intermediate partition to the low-back pressure area on the low-pressure chamber side, causing the intake refrigerant to overheat ineffectively, resulting in reduced compressor efficiency. Utility Model Content
[0003] In view of the above-mentioned defects of 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 utility model provides a heat insulation device for a compressor, comprising a middle partition plate, which divides a shell of the compressor into a high-pressure chamber and a low-pressure chamber, and a hollow heat insulation groove is provided inside the middle partition plate.
[0006] Preferably, the insulation tank is filled with an insulator.
[0007] Preferably, the heat insulation groove is connected to the high-pressure cavity or the low-pressure cavity, and the heat insulation body is the refrigerant in the high-pressure cavity or the low-pressure cavity.
[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 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 heat insulation groove is provided 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 recessed inward 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 utility model also provides a compressor, comprising the heat insulation device of the compressor as described above.
[0017] Compared with the prior art, the present invention has significant improvements:
[0018] This utility model provides a hollow insulation groove within the middle partition. This hollow structure effectively reduces the comprehensive thermal conductivity of the middle partition, reducing the amount of heat transferred through the middle partition. Specifically, it reduces heat transfer between the high-pressure cavity side's high back-pressure area and the low-pressure cavity side's low back-pressure area, effectively reducing the ineffective superheat of the suction refrigerant in the compressor and improving compressor performance. The insulation groove, fabricated within the middle partition, offers the advantages of simple structure, ease of fabrication, and low cost. Furthermore, it lacks moving parts and offers excellent reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic longitudinal section diagram of a compressor according to an embodiment of the present utility model.
[0020] Figure 2 It is a longitudinal cross-sectional schematic diagram of an implementation manner of a middle partition of a heat insulation device of a compressor according to an embodiment of the utility model.
[0021] Figure 3 It is a longitudinal sectional schematic diagram of another embodiment of the middle partition of the heat insulation device of the compressor of the utility model embodiment.
[0022] Figure 4 It is a schematic diagram of the appearance of the partition plate in the heat insulation device of the compressor according to an embodiment of the present utility model.
[0023] Figure 5It is a cross-sectional schematic diagram of a partition plate in a heat insulation device of a compressor according to an embodiment of the present utility model.
[0024] The description of the accompanying drawings is as follows:
[0025] 1 Middle partition
[0026] 1a Protrusion
[0027] 1b Depression
[0028] 101 Inhalation Hole
[0029] 102 Pump housing connection hole
[0030] 103 Shell connection hole
[0031] 10 Insulation tank
[0032] 11 Assembly through-holes
[0033] 111 First hole section
[0034] 112 Second hole section
[0035] 113 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 vent
[0042] 3 Low-pressure housing
[0043] 30 Low-pressure chamber
[0044] 301 air intake DETAILED DESCRIPTION
[0045] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.
[0046] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0047] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0048] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” 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 an intermediate 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 intermediate partition 1 is fastened to the high-pressure shell 2 and the low-pressure shell 3 by bolts. The high-pressure shell 2 and the intermediate partition 1 form a high-pressure chamber 20, and the high-pressure chamber 20 is provided with an exhaust hole 201. The low-pressure shell 3 and the intermediate partition 1 form a 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 intermediate 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 through 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. After being compressed in the pump body, it is discharged into the high-pressure chamber 20 through the air outlet of the pump body and then discharged through 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 is preferably made of a plastic material with a low thermal conductivity coefficient, which has a good thermal insulation effect. Preferably, the thermal insulation tank 10 can be filled with a plastic material with a low thermal conductivity coefficient by injection molding, and after cooling, a solid thermal insulator is obtained.
[0054] In another preferred embodiment, the thermal insulation tank 10 is connected to 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 thermal insulation tank 10 to serve as a thermal insulator, that is, the thermal insulator is the refrigerant in the high-pressure chamber 20 or the low-pressure chamber 30. Filling the thermal insulation tank 10 with refrigerant can effectively reduce the comprehensive thermal conductivity of the middle partition 1 and reduce the amount of heat transferred through the middle partition 1, because the refrigerant has a very low thermal conductivity and an extremely low flow rate or even no flow.
[0055] In this embodiment, the outer shell of the pump body, which is placed within the high-pressure chamber 20, has a neck portion at one end near the intermediate partition 1. The pump body outer shell may include a cylinder block and a cylinder head. The neck portion is formed on the side of the cylinder head near the intermediate partition 1, away from the cylinder block. An assembly through-hole 11 is provided in the intermediate partition 1. The assembly through-hole 11 axially extends through the intermediate partition 1. The assembly through-hole 11 is used to connect the neck portion of the pump body outer shell to enable assembly of the pump body outer shell and the intermediate partition 1. The assembly through-hole 11 is assembled with a clearance between the neck portion of the pump body outer shell and is sealed to ensure that the intermediate partition 1 separates the high-pressure chamber 20 from the low-pressure chamber 30.
[0056] Preferably, the heat insulation groove 10 on the middle partition 1 is connected to the assembly through hole 11, and the heat insulation groove 10 can be connected to the high-pressure chamber 20 or the low-pressure chamber 30 through the assembly relationship between the assembly through hole 11 and the shaft neck of the pump body shell.
[0057] Combine Figure 2 and Figure 3 Preferably, the assembly through-hole 11 includes a first hole segment 111, a second hole segment 112, and a third hole segment 113, which are connected in sequence along the axial direction. The first hole segment 111 is located near the low-pressure chamber 30, and the third hole segment 113 is located near the high-pressure chamber 20. The axial neck of the pump housing is penetrated by the first hole segment 111, the second hole segment 112, and the third hole segment 113 of the assembly through-hole 11. The first hole segment 111 and the third hole segment 113 both have a clearance fit with the axial neck of the pump housing, while the second hole segment 112 seals with the axial neck of the pump housing. The diameter of the second hole segment 112 can be set to be larger than the diameters of the first hole segment 111 and the third hole segment 113. In this case, a sealing ring can be embedded in the second hole segment 112 to achieve a sealed fit between the second hole segment 112 and the axial neck of the pump housing. As a result, gaps are created between the first hole section 111 and the third hole section 113 and the axial neck of the pump housing for the passage of refrigerant, and the sealing engagement between the second hole section 112 and the axial neck of the pump housing separates the gaps on either side. By connecting the heat-insulating groove 10 on the middle partition 1 to the first hole section 111 or the third hole section 113, the heat-insulating groove 10 can be connected to the low-pressure chamber 30 through the gap between the first hole section 111 and the axial neck of the pump housing, or to the high-pressure chamber 20 through the gap between the third hole section 113 and the axial neck of the pump housing, thereby achieving heat-insulating groove 10 communicating with either the high-pressure chamber 20 or the low-pressure chamber 30.
[0058] See also Figure 2 In one embodiment, the insulation groove 10 is connected to the third hole section 113. At this time, the insulation groove 10 is arranged on one side of the middle partition 1 close to the high-pressure chamber 20. The insulation groove 10 is connected to 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 insulation groove 10 from the low-pressure chamber 30, so that the refrigerant in the high-pressure chamber 20 can be introduced into the insulation groove 10, and the refrigerant is filled in the insulation groove 10 to form an insulator.
[0059] See also Figure 3 In another embodiment, the insulation groove 10 is connected to the first hole section 111. At this time, the insulation groove 10 is arranged on one side of the middle partition 1 close to the low-pressure chamber 30. The insulation groove 10 is connected to 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 insulation groove 10 from the high-pressure chamber 20, so that the refrigerant in the low-pressure chamber 30 can be introduced into the insulation groove 10, and the refrigerant is filled in the insulation groove 10 to form an insulator.
[0060] Of course, the method of 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 face 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, the end of the middle diaphragm 1 facing the low-pressure chamber 30 extends toward the low-pressure chamber 30 to form a protrusion 1a. The end of the middle diaphragm 1 facing the high-pressure chamber 20 is recessed toward the low-pressure chamber 30 to form a recessed portion 1b. The recessed portion 1b mates with the end of the pump housing where the shaft neck is located. Preferably, the thermal insulation groove 10 is disposed between the protrusion 1a and the recessed portion 1b. Preferably, the projection of the protrusion 1a toward the high-pressure chamber 20 overlaps the thermal insulation groove 10, such that the maximum outer perimeter of the thermal insulation groove 10 lies within the maximum outer perimeter 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 to the assembly through hole 11.
[0063] Preferably, the outer periphery of the thermal insulation groove 10 is recessed inward to form a plurality of escape portions 12. A hollow groove portion 13 is formed between each adjacent escape portion 12. All groove portions 13 are connected to the opening on the inner periphery of the thermal insulation groove 10, thereby forming a petal-shaped thermal insulation groove 10. The middle partition 1 is provided with a pump housing connection hole 102. When the pump housing is assembled with the middle partition 1, the axial neck of the pump housing is passed through the assembly through-hole 11, and the pump housing is fastened to the pump housing connection hole 102 by bolts. By configuring the thermal insulation groove 10 in a petal shape, the pump housing connection hole 102 can be positioned on the escape portion 12 formed by the recess on the outer periphery of the thermal insulation groove 10, thereby allowing the thermal insulation groove 10 to avoid the pump housing connection hole 102 on the middle partition 1 to prevent refrigerant leakage. Preferably, the air intake hole 101 on the middle partition 1 is also positioned on the escape portion 12 formed by the recess on the outer periphery of the thermal insulation groove 10. In addition, the middle partition 1 is provided with a shell connection hole 103, to which the compressor shell (high-pressure shell 2 and low-pressure shell 3) is fastened 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. 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 the avoidance portion 12. In addition to forming the heat insulation groove 10 in a petal shape to avoid the pump shell connection hole 102, the air intake hole 101 and the shell connection hole 103, the avoidance portion 12 also acts as a reinforcing rib, which can increase the structural strength of the middle partition 1.
[0064] In this embodiment, reinforcing ribs 14 are preferably provided within the insulation groove 10. Ribs 14 are located between the inner and outer peripheries of the insulation groove 10. Ribs 14 connect the two side walls of the insulation groove 10, respectively, adjacent to the high-pressure chamber 20 and the low-pressure chamber 30. Ribs 14 provide support and structural strength within the insulation groove 10, thereby increasing the overall structural strength of the intermediate partition 1. Preferably, a reinforcing rib 14 is provided within each groove portion 13 to ensure uniform structural strength.
[0065] In this embodiment, the shape of the thermal insulation groove 10 is not limited. The cross-section of the thermal insulation groove 10 is generally annular, and the outer periphery can be a circle or any polygon with multiple recessed avoidance portions 12. The maximum diameter of the outer periphery of the thermal insulation groove 10 can be any suitable diameter within the outer diameter range of the intermediate partition 1. The longitudinal cross-section of the thermal insulation groove 10 can be rectangular, straight, or other shapes. The thickness of the thermal insulation groove 10 is less than the thickness of the intermediate partition 1. To ensure the strength of the intermediate partition 1, the thickness of the thermal insulation groove 10 cannot be too large compared to the thickness of the intermediate partition 1. The intermediate partition 1 must have a certain wall thickness on both sides of the thermal insulation groove 10 to ensure that the structural strength of the intermediate partition 1 meets the operating requirements of the compressor. The specific shape and size of the thermal insulation groove 10 can be adaptively set according to the shape and internal space of the intermediate partition 1.
[0066] Based on the heat insulation device of the compressor of the present invention, the embodiment of the present invention further provides a compressor. The compressor of this embodiment includes the heat insulation device of the compressor of this 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 replacements can be made without departing from the technical principles of the present invention. These improvements and replacements 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-insulating groove (10) is connected to the high-pressure chamber (20) or the low-pressure chamber (30), and the heat-insulating 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 placed in the high-pressure chamber (20) has a shaft neck 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, and the assembly through hole (11) is gap-assembled with the shaft neck and 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 section (111), a second hole section (112) and a third hole section (113) which are sequentially connected along the axial direction; the first hole section (111) and the third hole section (113) are both clearance-matched with the shaft neck; the second hole section (112) is sealingly matched with the shaft neck; and the heat-insulating groove (10) is connected to the first hole section (111) or the third hole section (113).
8. The heat insulation device for a compressor according to claim 1, characterized in that: 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 recess (1b), and the heat insulation groove (10) is provided between the protrusion (1a) and the recess (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 recessed inward 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: Reinforcing ribs (14) are provided in the heat-insulating groove (10).
12. A compressor, characterized in that: A heat insulating device for a compressor comprising the device according to any one of claims 1 to 11.