Integrated oil return structure and compressor comprising same

Abstract

The utility model provides an integrated oil return structure and a compressor comprising the same, relates to the technical field of compressors, and solves the technical problems that the oil return structure has many welding spots and is easy to leak. The integrated oil return structure comprises a shell, a filter screen and a valve element. The filter screen and the valve element are both arranged in the shell so as to filter return oil. The filter screen and the valve element are connected with the shell in a calendaring machining mode. The two filter screens are arranged at the two ends of the shell correspondingly, and the valve element is arranged between the two filter screens. The number of the valve element is at least one, and all the valve elements are sequentially arranged in the shell. According to the utility model, the filter and the capillary holes are integrated, so that the oil return structure is greatly simplified, the installation is simpler, the structure is more reliable, the occupied space is reduced, and the leakage condition is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an integrated oil return structure and a compressor comprising the same. Background Art

[0002] In air conditioning systems, compressor lubrication is crucial to proper operation. When the compressor compresses the refrigerant and discharges it, it carries a small amount of refrigerant oil with it, leading to insufficient oil in the compressor. The current mainstream solution is to use an oil return structure consisting of a capillary tube and a filter.

[0003] The applicant has found that the existing technology has at least the following technical problems: Figure 1 As shown, the existing oil return structure consisting of a capillary tube 4 and a filter 5 requires welding at the connection points between the filter 5 and the capillary tube, as well as at the connection point between the transition tube and the capillary tube. Due to the large number of welding points and poor processing quality, leakage is prone to occur during use, seriously affecting the performance of the air conditioner. Utility Model Content

[0004] The purpose of the utility model is to provide an integrated oil return structure and a compressor comprising the same, so as to solve the technical problems in the prior art of the oil return structure having many welding points and easy leakage.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The utility model provides an integrated oil return structure, comprising a housing, a filter screen, and a valve core; the filter screen and the valve core are both arranged in the housing to filter the return oil; the filter screen and the valve core are connected to the housing by a calendering process.

[0007] The integrated oil return structure provided by the utility model integrates the filter and the capillary pores into one, which greatly simplifies the oil return structure, makes installation simpler, and provides a more reliable structure, reduces occupied space, and reduces leakage.

[0008] As a further improvement of the present invention, there are two filter screens, which are respectively arranged at both ends of the shell, and the valve core is arranged between the two filter screens.

[0009] As a further improvement of the present invention, there is at least one valve core, and all of the valve cores are sequentially arranged in the housing.

[0010] As a further improvement of the present invention, the filter mesh has a specification of 80-120 meshes.

[0011] As a further improvement of the present invention, the number of the valve cores is 1-5, and all the valve cores are arranged in sequence.

[0012] As a further improvement of the present invention, an oil return hole is opened in the middle of the valve core.

[0013] As a further improvement of the present invention, the specification of the oil return hole is φ1-φ2.5mm.

[0014] As a further improvement of the present invention, the filter screen is a hemispherical structure.

[0015] The utility model provides a compressor, which comprises an oil separator, a compressor body and the integrated oil return structure.

[0016] As a further improvement of the present invention, the integrated oil return structure is connected to the oil return pipe of the low-pressure side of the compressor body and the oil separator through copper tubes respectively; and the copper tube and the integrated oil return structure are connected by brazing.

[0017] The compressor provided by the utility model includes an integrated oil return structure with simple structure, stability and reliability. When the air-conditioning system is working, the refrigerant is exhausted from the compressor to the oil separator, and the refrigerant and oil are separated through the oil separator. The oil enters from one side of the oil return structure, and after being filtered by the filter, the clean fluid passes through the oil return hole of the valve core, ensuring that the refrigerant passing through the oil return structure reaches the rated flow rate, thereby realizing stable oil return of the air-conditioning system. The oil return structure has a two-way filtering structure, and there is no need to distinguish the direction, so it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural diagram of the oil return structure in the prior art;

[0020] Figure 2 It is a cross-sectional view of the integrated oil return structure of the utility model.

[0021] In the figure, 1 is the housing; 2 is the filter screen; 3 is the valve core; 31 is the oil return hole; 4 is the capillary tube; 5 is the filter. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0023] like Figure 1 The figure shows the structure of the oil return capillary assembly in the prior art, which is composed of a filter 5 and a capillary 4, with many welding points and poor processing technology. In order to solve this problem, Figure 2 As shown, the utility model provides an integrated oil return structure, including:

[0024] Housing 1, used to fix filter screen 2 and valve core 3;

[0025] Filter 2 is used to filter impurities to prevent them from blocking the oil return hole of the oil return valve core. The specific mesh size of filter 2 is based on system requirements and is generally 80-120 mesh.

[0026] The valve core 3 has an oil return hole 31 in the middle for oil return. The diameter of the oil return hole 31 is determined by the system requirements (the general design size is between φ1-2.5mm);

[0027] The filter screen 2 and the valve core 3 are both arranged in the housing 1 to filter the return oil;

[0028] In order to reduce welding points, the filter screen 2 and the valve core 3 in the present invention are fixedly connected to the housing 1 by a rolling process.

[0029] The integrated oil return structure provided by the utility model integrates the filter and the capillary pores into one, which greatly simplifies the oil return structure, makes installation simpler, and provides a more reliable structure, reduces occupied space, and reduces leakage.

[0030] As a further improvement to the present invention, in order to achieve bidirectional filtration without distinguishing directions and facilitating use, in this embodiment, two filter screens 2 are provided, one at each end of the housing 1, and the valve core 3 is provided between the two filter screens 2. With this structural arrangement, return oil can enter from either end of the housing 1, achieving bidirectional use.

[0031] In order to achieve the return oil filtering effect, there is at least one valve core 3 , and all valve cores 3 are arranged in the housing 1 in sequence.

[0032] Furthermore, the number of valve cores 3 is 1-5, and all valve cores 3 are arranged in sequence, which can ensure the versatility of materials and reduce costs. Figure 2As shown, there are three valve cores 3 shown, which are arranged in sequence. The oil return holes 31 in each valve core 3 are arranged opposite to each other and have the same specifications, so that the return oil can pass smoothly.

[0033] Furthermore, the oil return hole 31 is opened in the middle of the valve core 3 , and the specification of the oil return hole 31 is φ1-φ2.5 mm.

[0034] As a further improvement of the present invention, the filter screen 2 is a hemispherical structure.

[0035] During implementation, the oil return structure is connected to the oil return pipe of the oil separator and the low-pressure side of the refrigeration system. Copper pipes are generally used for connection, and the copper pipes and the oil return structure are connected by brazing.

[0036] The utility model provides a compressor comprising an oil separator, a compressor body and an integrated oil return structure.

[0037] As a further improvement of the present invention, the integrated oil return structure is connected to the oil return pipe of the low-pressure side of the compressor body and the oil separator through copper tubes respectively; and the copper tubes and the integrated oil return structure are connected by brazing.

[0038] When the air conditioning system is working, the refrigerant is exhausted from the compressor to the oil separator, where the refrigerant and oil are separated. The oil enters from one side of the oil return structure, is filtered by the filter 2, and then the clean fluid passes through the oil return hole 31 of the valve core 3. The diameter of the oil return hole 31 is designed according to the oil return requirements (generally, the design size is between φ1-2.5mm). At the same time, multiple valve cores 3 can be designed and stacked according to the oil return conditions of the unit (the figure shows three valve cores 3, which are specifically designed to match different air conditioning systems) to ensure that the refrigerant passing through the oil return structure reaches the rated flow rate, thereby achieving stable oil return for the air conditioning system.

[0039] The compressor provided by the utility model comprises an integrated oil return structure with simple structure, stability and reliability. The oil return structure has a two-way filtering structure, does not need to distinguish directions, and is easy to use.

[0040] First of all, it should be noted that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached figures. Figure 1The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An integrated oil return structure, characterized in that: It includes a shell, a filter screen, and a valve core; the filter screen and the valve core are both arranged in the shell to filter the return oil; the filter screen and the valve core are connected to the shell by a calendering process.

2. The integrated oil return structure according to claim 1, characterized in that: There are two filter screens, which are respectively arranged at two ends of the shell, and the valve core is arranged between the two filter screens.

3. The integrated oil return structure according to claim 1, characterized in that: There is at least one valve core, and all of the valve cores are sequentially arranged in the housing.

4. The integrated oil return structure according to claim 1, characterized in that: The specification of the filter screen is 80-120 meshes.

5. The integrated oil return structure according to claim 1, characterized in that: The number of the valve cores is 1-5, and all the valve cores are arranged in sequence.

6. The integrated oil return structure according to claim 3 or 5, characterized in that: An oil return hole is provided in the middle of the valve core.

7. The integrated oil return structure according to claim 6, characterized in that: The specification of the oil return hole is φ1-φ2.5mm.

8. The integrated oil return structure according to claim 1, characterized in that: The filter screen is a hemispherical structure.

9. A compressor, characterized in that: The utility model comprises an oil separator, a compressor body and an integrated oil return structure as claimed in any one of claims 1 to 8.

10. The compressor according to claim 9, characterized in that The integrated oil return structure is connected to the low-pressure side of the compressor body and the oil return pipe of the oil separator through copper pipes respectively; and the copper pipe and the integrated oil return structure are connected by brazing.

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