Patent Description:
Compressor is a type of driven fluid machinery that promotes low-pressure gas to high-pressure gas, which is the heart of a refrigeration system. The compressor generally includes a compressor body and a liquid accumulator. For the liquid accumulator in the related art, its fixing means is of disadvantages of complicated process and high manufacturing cost. <CIT> relates to a compressor liquid accumulator comprising a liquid accumulator shell, wherein the liquid accumulator shell is welded by at least two shell branch portions. <CIT> relates to a liquid storage device that is convenient for welding, and discloses an end cap and a main body of the accumulator, and a connecting structure of the end cap and the main body is provided with a shrinkage structure whose diameter is gradually reduced. <CIT> relates to a compressor liquid accumulator comprising a liquid accumulator shell, wherein the liquid accumulator shell is welded by at least two shell branch portions. <CIT>relates to a scroll compressor and discloses closed vessel welds that are flush with a container body.

The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

For this, one aspect of the present disclosure is to provide a compressor liquid accumulator, which has the advantages of a simple structure, a high welding efficiency and a low cost.

Another aspect of the present disclosure is to provide a compressor comprising the compressor liquid accumulator as described above.

According to embodiments in a first aspect of the present disclosure as set out in claim <NUM>, there is provided a compressor liquid accumulator, comprising: a first suction cup and a second suction cup, wherein.

According to the compressor liquid accumulator in embodiments of the present disclosure, a first suction cup provided with a first welding surface and a second suction cup provided with a second welding surface are provided, and the first suction cup is provided with a first extending portion which can be located in the cavity of the second suction cup, thereby reducing the influence of welding process on the performance of other parts of the compressor liquid accumulator, thus benefiting to the improvement of welding quality, simplifying the welding process, improving the welding efficiency, and saving cost. Further, the stability of the mating connection between the first suction cup and the second suction cup can be increased, thus improving the stability of the compressor liquid accumulator. Furthermore, the efficiency of the mating connection between the first suction cup and the second suction cup can be increased, thus improving the production efficiency.

According to embodiments of the present disclosure, the first suction cup comprises:.

According to embodiments of the present disclosure, a wall thickness of the second suction cup is L1, and a width of the first welding surface is L2 in a direction of the wall thickness of the second suction cup, wherein <NUM>≤L2/L1≤<NUM>.

According to embodiments of the present disclosure, a wall thickness of the second suction cup is L1, and a welding fusion portion is formed at a welding position of the first welding surface and the second welding surface, a width of the welding fusion portion is L2' in a direction of the wall thickness of the second suction cup, wherein <NUM>≤L2'/L1≤<NUM>.

According to embodiments of the present disclosure, the width of the welding fusion portion is L2', wherein L2'≥<NUM>.

According to embodiments of the present disclosure, a smooth transition portion is provided between the first body portion and the flanging portion.

According to embodiments of the present disclosure, a thickness of the smooth transition portion is Bt1, and a thickness of the first body portion is At1, wherein Bt1>At1.

According to embodiments of the present disclosure, the first extending portion is a protrusion.

According to embodiments of the present disclosure, there is one first extending portion, the first extending portion is in a ring-shape, and the first extending portion extends along a circumferential direction of the first suction cup.

According to embodiments of the present disclosure, there is a plurality of the first extending portions, and the plurality of the first extending portions are distributed at intervals along a circumferential direction of the first suction cup.

According to embodiments of the present disclosure, the first welding surface and the second welding surface are connected by a resistance welding process.

According to embodiments of the present disclosure, the first suction cup is provided with a first suction tube, the first suction tube is in communication with the cavity, and the first suction tube and the first suction cup are fixed by flame brazing, induction brazing or resistance welding.

According to embodiments of the present disclosure, the compressor liquid accumulator further comprises a third suction cup, wherein the third suction cup is connected to the second suction cup, and the second suction cup is located between the first suction cup and the third suction cup.

According to embodiments of the present disclosure, a surface, facing the second suction cup, of the third suction cup is provided with a third welding surface, a surface, facing the third suction cup, of the second suction cup is provided a fourth welding surface on, and the third welding surface and the fourth welding surface are connected in a welded manner.

According to embodiments of the present disclosure, one of the third suction cup and the second suction cup comprises a second extending portion, the second extending portion is located in the cavity, and the second extending portion abuts against a corresponding second suction cup or a corresponding third suction cup.

According to embodiments in a second aspect of the present disclosure, there is provided a compressor comprising the compressor liquid accumulator as described above.

According to the compressor in embodiments of the present disclosure, a first suction cup provided with a first welding surface and a second suction cup provided with a second welding surface are provided, and the first suction cup is provided with a first extending portion which can be located in the cavity of the second suction cup, thereby reducing the influence of welding process on the performance of other parts of the compressor liquid accumulator, thus benefiting to the improvement of welding quality, simplifying the welding process, improving the welding efficiency, and saving cost. Further, the stability of the mating connection between the first suction cup and the second suction cup can be increased, thus improving the stability of the compressor liquid accumulator. Furthermore, the efficiency of the mating connection between the first suction cup and the second suction cup can be increased, thus improving the production efficiency.

The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present disclosure, which should not be understood as a limitation to the present disclosure.

The compressor liquid accumulator <NUM> according to an embodiment of the present disclosure is described in detail below with reference to the accompanying drawings.

Referring to <FIG> and <FIG>, the compressor liquid accumulator <NUM> according to embodiments in a first aspect of the present disclosure includes a first suction cup <NUM> and a second suction cup <NUM>.

Specifically, as shown in <FIG> and <FIG>, a surface, facing the second suction cup <NUM>, of the first suction cup <NUM> is provided with a first welding surface <NUM>. It can be understood that the first welding surface <NUM> is opposite to an end surface of the second suction cup <NUM>. A surface, facing the first suction cup <NUM>, of the second suction cup <NUM> is provided with a second welding surface <NUM>. That is, the second welding surface <NUM> is opposite to an end surface of the first suction cup <NUM>.

The first welding surface <NUM> and the second welding surface <NUM> are opposite and the first welding surface <NUM> and the second welding surface <NUM> can be connected, so that the first suction cup <NUM> and the second suction cup <NUM> can be connected together in a mated manner, and the first suction cup <NUM> and the second suction cup <NUM> connected in a mated manner can define a cavity <NUM>. It can be understood that the connection between the first suction cup <NUM> and the second suction cup <NUM> can be realized by the welding connection between the first welding surface <NUM> and the second welding surface <NUM>. That is, the overall connection process of the first suction cup <NUM> and the second suction cup <NUM> can be concentrated on the welding process of the first welding surface <NUM> and the second welding surface <NUM>. Therefore, the influence of the welding process on the performance of other parts of the compressor liquid accumulator <NUM> can be reduced, which is beneficial to the improvement of welding quality, simplifies the welding process, improves welding efficiency and saves the cost.

For example, as shown in <FIG>, the first suction cup <NUM> may be located above the second suction cup <NUM> (above as shown in <FIG>). The first suction cup <NUM> has an opening toward the second suction cup <NUM>, and the second suction cup <NUM> may also have an opening toward the first suction cup <NUM>. The first suction cup <NUM> may be connected to the second suction cup <NUM> to allow the opening of the first suction cup <NUM> to be in corresponding communication with the opening of the second suction cup <NUM>. At this time, as shown in <FIG>, a part of the first suction cup <NUM> is in contact with the second suction cup <NUM> and the surface of this part may be the first welding surface <NUM>. A part of the second suction cup <NUM> is in contact with the first suction cup <NUM> and the surface of this part may be the second welding surface <NUM>. The first welding surface <NUM> is opposite to the second welding surface <NUM>.

It should be noted that the first suction cup <NUM> may be also provided with a first extending portion <NUM>, the first extending portion <NUM> can be adjacent to the first welding surface <NUM>, and the first extending portion <NUM> can be located in the cavity <NUM> defined by the second suction cup <NUM>. Therefore, the positional relationship between the first extending portion <NUM> and the second suction cup <NUM> can be used to facilitate the realization of limiting and positioning the mating connection of the first suction cup <NUM> and the second suction cup <NUM> in a circumferential direction of the opening of the first suction cup <NUM> when the first suction cup <NUM> and the second suction cup <NUM> are connected in a mated manner. Thus, the stability of the mating connection between the first suction cup <NUM> and the second suction cup <NUM> can be improved, thereby improving the stability of the compressor liquid accumulator <NUM>. Further, the efficiency of the mating connection between the first suction cup <NUM> and the second suction cup <NUM> can be also improved, thereby increasing the production efficiency.

For example, as shown in <FIG>, the first suction cup <NUM> may be located above the second suction cup <NUM>. The first suction cup <NUM> may have an opening facing the second suction cup <NUM>. The first suction cup <NUM> is provided with a portion extending to the cavity <NUM> of the second suction cup <NUM> along the direction of the opening facing the second suction cup. The extending portion is a first extending portion <NUM>.

According to the compressor liquid accumulator <NUM> in embodiments of the present disclosure, a first suction cup <NUM> provided with a first welding surface <NUM> and a second suction cup <NUM> provided with a second welding surface <NUM> are provided, and the first suction cup <NUM> is provided with a first extending portion <NUM> which can be located in the cavity <NUM> of the second suction cup <NUM>, thereby reducing the influence of welding process on the performance of other parts of the compressor liquid accumulator <NUM>, thus benefiting to the improvement of welding quality, simplifying the welding process, improving the welding efficiency, and saving cost. Further, the stability of the mating connection between the first suction cup <NUM> and the second suction cup <NUM> can be increased, thus improving the stability of the compressor liquid accumulator <NUM>. Furthermore, the efficiency of the mating connection between the first suction cup <NUM> and the second suction cup <NUM> can be increased, thus improving the production efficiency.

According to some embodiments of the present disclosure, referring to <FIG> and <FIG>, the first suction cup <NUM> may further include a first body portion <NUM> and a flanging portion <NUM>. In which, the flanging portion <NUM> is formed by folding the first body portion <NUM> toward an edge of the second suction cup <NUM> and toward an outside of the cavity <NUM>, and a surface facing towards the second suction cup <NUM>, of the flanging portion <NUM> is the first welding surface <NUM> and the first extending portion <NUM> is disposed at the flanging portion <NUM>. Therefore, by disposing the first extending portion <NUM> at the flanging portion <NUM> and severing the surface facing towards the second suction cup <NUM>, of the flanging portion <NUM> as the first welding surface <NUM>, the mating between the first extending portion <NUM> and the second suction cup <NUM> can be used to make the welding and mating between the first welding surface <NUM> and the second suction cup <NUM> more precise and stable.

As shown in <FIG> and <FIG>, the cooperation between the first extending portion <NUM> and the second suction cup <NUM> can have a limiting effect in the plane direction of the first welding surface <NUM>, thereby can reduce the probability of damage to the welding and mating between the first welding surface <NUM> and the second suction cup <NUM> due to excessive force when the external force in the plane direction of the first welding surface <NUM> acts on the first suction cup <NUM>. In addition, the cooperation between the first extending portion <NUM> and the second suction cup <NUM> can also have a good positioning effect, which is beneficial to the welding connection of the first welding surface <NUM> and the second suction cup <NUM> to locate the welding spot, thereby improving the welding efficiency.

For example, as shown in <FIG> and <FIG>, the first suction cup <NUM> may be connected above the second suction cup <NUM> to define a cavity <NUM>. A portion, located in an internal space of the first suction cup <NUM>, of the cavity <NUM> is defined by a part of body portion of the first suction cup <NUM>. The part of body portion of the suction cup <NUM> defining the portion of the cavity <NUM> may be referred to as a first body portion <NUM>. A part, close to an edge of the second suction cup <NUM>, of the first body portion <NUM> may be folded toward the edge of the second suction cup <NUM> and toward the outside of the cavity <NUM>, and the folded part formed thereby may be a flanging portion <NUM>.

As shown in <FIG> and <FIG>, a part of the flanging portion <NUM> is located above the edge of the second suction cup <NUM> and can be welded to the second suction cup <NUM>. A surface of the part of the flanging portion <NUM> which can be welded to the second suction cup <NUM> may be the first welding surface <NUM>. A part of the flanging portion <NUM> may extend into the cavity <NUM> of the second suction cup <NUM>, and an extending portion of the flanging portion <NUM> may be tightly adjacent to the inner wall of the second suction cup <NUM>, and the extending portion of the flanging portion <NUM> may be the first extending portion <NUM>.

According to some embodiments of the present disclosure, referring to <FIG>, a wall thickness of the second suction cup <NUM> is L1, and a width of the first welding surface <NUM> in the wall thickness direction of the second suction cup <NUM> may be L2, which can satisfy <NUM>≤L2/L1≤<NUM>, so that an optimal value of L2/L1 can be selected according to actual needs, thereby the strength and stability of the welding connection can be improved. For example, L2/L1 can be <NUM>, <NUM>, or <NUM>.

According to some embodiments of the present disclosure, referring to <FIG>, a welding fusion portion is formed at a welding position of the first welding surface <NUM> and the second welding surface <NUM>. A width of the welding fusion portion is L2' in a direction of the wall thickness of the second suction cup <NUM>, in which <NUM>≤L2'/L1≤<NUM>, so that an optimal value of L2'/L1 can be selected according to the strength requirements of the welding connection. It is understandable that the welding fusion portion is not limited to being completely located within the edge range of the peripheral wall of the second suction cup <NUM> in the wall thickness direction. For example, L2'/L1 can be <NUM> or <NUM>, by which a part of the welding fusion portion is located outside the edge range of the peripheral wall of the second suction cup <NUM> in the wall thickness direction of the second suction cup <NUM>.

According to some embodiments of the present disclosure, the width of the welding fusion portion is L2', and L2'≥<NUM>. Thereby, the size of the welding fusion portion can be optimized according to different sizes of the compressor liquid accumulator <NUM>, so that the compressor liquid accumulator <NUM> can have good connection strength and stability while reducing production costs. For example, L2' can be <NUM>, <NUM>, or <NUM>.

According to some embodiments of the present disclosure, a smooth transition portion can be provided between the first body portion <NUM> and the flanging portion <NUM>. Thereby, the stress of material can be reduced during the folding process of a part of the first body portion <NUM> to form the flanging portion <NUM>, thus reducing the difficulty of forming the flanging portion <NUM>.

For example, as shown in <FIG> and <FIG>, the part, close to the edge of the second suction cup <NUM>, of the first body portion <NUM> may be folded toward the edge of the second suction cup <NUM> and toward the outside of the cavity <NUM> to form the flanging portion <NUM>. There is a large angular difference between a plane where the flanging portion <NUM> is located and an extension plane of the part, close to the edge of the second suction cup <NUM>, of the first body portion <NUM>, so that a smooth transition portion in an arc-shape can be formed between the flanging portion <NUM> and the first body portion <NUM>, and the smooth transition portion may also be referred to as the first transition portion <NUM>.

According to some embodiments of the present disclosure, referring to <FIG>, a thickness of the first transition portion <NUM> is Bt1, and a thickness of the first body portion <NUM> is At1, which may satisfy Bt1>At1. It can be understood that, in the process of folding the first body portion <NUM> to form the flanging portion <NUM>, the thickness of the flanging portion <NUM> formed during folding the first body portion <NUM> can be increased along with stretching material. Meanwhile, the stress concentration at the bending position can be reduced, thus the possibility of fatigue damage of the flanging portion <NUM> can be reduced.

According to some embodiments of the present disclosure, the first extending portion <NUM> may be formed as a protrusion. Therefore, by configuring the first extending portion <NUM> as a protruding structure, the first extending portion <NUM> and the second suction cup <NUM> can form a mating fit, which is beneficial to positioning and limiting the mating connection of the first extending portion <NUM> and the second suction cup <NUM>.

According to some embodiments of the present disclosure, the first extending portion <NUM> may be in a ring-shape, and the first extending portion <NUM> extends along a circumferential direction of the first suction cup <NUM>. It can be understood that the ring-shaped first extending portion <NUM> can be a closed structure, and the ring-shape structure has a high stability. Therefore, by providing the ring-shaped first extending portion <NUM>, the positioning and limiting capabilities of the first extending portion <NUM> can be improved, and the sealing performance of the compressor liquid accumulator <NUM> can be also improved due to the airtightness of the ring-shaped structure.

According to some embodiments of the present disclosure, there may be a plurality of first extending portions <NUM>, and the plurality of first extending portions <NUM> may be distributed at intervals along the circumferential direction of the first suction cup <NUM>. Therefore, the number and position of the first extending portion <NUM> can be selected according to actual needs, thus saving materials and costs.

According to some embodiments of the present disclosure, the first welding surface <NUM> and the second welding surface <NUM> can be connected by a resistance welding process. It should be noted that, during the welding operation of resistance welding, the heat is relatively concentrated, and the heat generated by welding process has little effect on other areas of the compressor liquid accumulator <NUM>, thereby reducing adverse effects of the heat generated by welding on the compressor liquid accumulator <NUM>. Further, welding parts by resistance welding would not produce large deformation and stress, usually correction and heat treatment procedures do not need to be arranged after welding, which can improve production efficiency and reduce costs. In addition, resistance welding does not require filler metals such as welding wire, welding rod and the like, so that it is suitable for operation in a small space and the welding cost is low.

Resistance welding refers to a method that uses a strong current to pass through the contact point between the electrode and the workpiece and achieves welding by contacting resistance to generate heat. Resistance welding is divided into spot welding, projection welding, seam welding, butt welding, resistance bolt welding and the like, and is characterized by short power-on time, high production efficiency and stable welding quality.

According to some embodiments of the present disclosure, referring to <FIG>, the first suction cup is provided with a first suction tube <NUM>, the first suction tube <NUM> can be in communication with the cavity <NUM> to communicate the cavity <NUM> with the outside, and the first suction tube <NUM> and the first suction cup <NUM> are fixed by flame brazing, induction brazing or resistance welding. It can be understood that an optimized welding method can be selected according to the shape and size of the first suction tube <NUM> to meet the requirements of the connection strength between the first suction tube <NUM> and the first suction cup <NUM>.

It should be noted that the flame brazing is divided into torch brazing and flame soldering. Flame brazing uses the flame of combustible gas mixed with oxygen or compressed air as the heat source for welding, and flame brazing can use multiple flames to heat and weld at the same time according to the shape of workpiece, which is suitable for welding small components.

Induction brazing is a welding method that uses high-frequency, intermediate-frequency or power-frequency induction current as a heat source. High frequency heating is suitable for welding thin-wall pipe fittings. The use of coaxial cables and split-combination induction coils can be used for brazing at sites far away from the power source, and is particularly suitable for welding some large components, such as welding pipe joints that need to be disassembled on rockets.

According to some embodiments of the present disclosure, referring to <FIG>, the compressor liquid accumulator <NUM> may further include a third suction cup <NUM>. The third suction cup <NUM> may be connected to the second suction cup <NUM>, and the second suction cup <NUM> is located between the first suction cup <NUM> and the third suction cup <NUM>. Therefore, by disposing the first suction cup <NUM>, the second suction cup <NUM> and the third suction cup <NUM> to be connected in sequence, the internal space of the compressor liquid accumulator <NUM> can be defined to accommodate working components of the compressor liquid accumulator <NUM>, and thus storage space for refrigerant is provided.

For example, as shown in <FIG>, the first suction cup <NUM> is located above the second suction cup <NUM>, and the first suction cup <NUM> is connected with the second suction cup <NUM> to define a cavity <NUM>. The cavity <NUM> defined by the first suction cup <NUM> and the second suction cup <NUM> has an opening in a downward direction. In order to realize the structure of the cavity <NUM> into a sealed structure with accommodating effect, a component can be provided under the second suction cup <NUM> to cover the opening in a downward direction of the cavity <NUM>. The component may be referred to as a third suction cup <NUM>.

According to some embodiments of the present disclosure, referring to <FIG> and <FIG>, a surface, facing the second suction cup <NUM>, of the third suction cup <NUM> is provided with a third welding surface <NUM>. A surface, facing the third suction cup <NUM>, of the second suction cup <NUM> is provided a fourth welding surface <NUM>, and the third welding surface <NUM> and the fourth welding surface <NUM> are connected in a welded manner. Thus, the welding connection between the third welding surface <NUM> and the fourth welding surface <NUM> can be used to connect the second suction cup <NUM> and the third suction cup <NUM> together. That is, the overall connection process of the second suction cup <NUM> and the third suction cup <NUM> can be concentrated on the welding process of the third welding surface <NUM> and the fourth welding surface <NUM>. Therefore, the influence of the welding process on the performance of other parts of the compressor liquid accumulator <NUM> can be reduced, which is beneficial to the improvement of welding quality, simplifies the welding process, improves welding efficiency and saves the cost.

According to some embodiments of the present disclosure, referring to <FIG> and <FIG>, one of the third suction cup <NUM> and the second suction cup <NUM> may have a second extending portion <NUM>, the second extending portion <NUM> can be located in the cavity <NUM>, and the second extending portion <NUM> abuts against a corresponding second suction cup <NUM> or a corresponding third suction cup <NUM>. It can be understood that the third suction cup <NUM> may have a second extending portion <NUM>, and the second extending portion <NUM> can abut against the second suction cup <NUM>.

The second suction cup <NUM> may be provided with a second extending portion <NUM>, and the second extending portion <NUM> can abut against the third suction cup <NUM>. Therefore, limiting and positioning the connection of the third suction cup <NUM> and the second suction cup <NUM> can be realized by providing the second extending portion <NUM> at one of the third suction cup <NUM> and the second suction cup <NUM> and making the second extending portion <NUM> to abut against suction cup.

For example, as shown in <FIG> and <FIG>, the third suction cup <NUM> may be located below the second suction cup <NUM>. The third suction cup <NUM> may have an opening facing towards the second suction cup <NUM>. The third suction cup <NUM> may have a portion extending to the cavity <NUM> of the second suction cup <NUM> along the direction of the opening facing the second suction cup, and the extending portion may be a second extending portion <NUM>.

According to embodiments in a second aspect of the present disclosure, there is provided a compressor comprising the compressor liquid accumulator <NUM> as described above.

According to the compressor in embodiments of the present disclosure, a first suction cup <NUM> provided with a first welding surface <NUM> and a second suction cup <NUM> provided with a second welding surface <NUM> are provided, and the first suction cup <NUM> is provided with a first extending portion <NUM> which can be located in the cavity <NUM> of the second suction cup <NUM>, thereby reducing the influence of welding process on the performance of other parts of the compressor liquid accumulator <NUM>, thus benefiting to the improvement of welding quality, simplifying the welding process, improving the welding efficiency, and saving cost. Further, the stability of the mating connection between the first suction cup <NUM> and the second suction cup <NUM> can be increased, thus improving the stability of the compressor liquid accumulator <NUM>. Furthermore, the efficiency of the mating connection between the first suction cup <NUM> and the second suction cup <NUM> can be increased, thus improving the production efficiency.

Hereinafter, the compressor liquid accumulator <NUM> according to the present disclosure will be described in detail with reference to <FIG>. It should be understood that the following description is only an exemplary description, rather than a specific limitation to the application.

As shown in <FIG>, the compressor liquid accumulator <NUM> includes a first suction cup <NUM>, a second suction cup <NUM> and a third suction cup <NUM>.

As shown in <FIG>, the first suction cup <NUM> is located above the second suction cup <NUM>, and the second suction cup <NUM> is located above the third suction cup <NUM>. The first suction cup <NUM> has an opening facing toward the second suction cup <NUM>, and the second suction cup <NUM> may also have an opening facing toward the first suction cup <NUM>. The first suction cup <NUM> may be connected to the second suction cup <NUM> to allow the opening of the first suction cup <NUM> to be in corresponding communication with the opening of the second suction cup <NUM> and define a cavity <NUM>. The first suction cup <NUM> includes a first body portion <NUM>. The first body portion <NUM> is located above the opening of the second suction cup <NUM>, and the first body portion <NUM> is buckled with the opening of the second suction cup <NUM>. A part, close to an edge of the second suction cup <NUM>, of the first body portion <NUM> may be folded towards the outside of the cavity <NUM> to form a flanging portion <NUM>. A part of the flanging portion <NUM> is located above the peripheral wall of the second suction cup <NUM>. A first welding surface <NUM> can be formed on a surface of the part of the flanging portion <NUM>, located above the edge of the second suction cup <NUM>. A second welding surface <NUM> can be formed at a position where the edge of the second suction cup <NUM> corresponds to the first welding surface <NUM>. The first welding surface <NUM> is opposite to the second welding surface <NUM>, and the first welding surface <NUM> and the second welding surface <NUM> can be connected by a resistance welding process.

As shown in <FIG> and <FIG>, a part of the flanging portion <NUM> may extend toward the cavity <NUM> of the second suction cup <NUM> to form a first extending portion <NUM>, and the first extending portion <NUM> can be located inside the peripheral wall of the second suction cup <NUM>. A gap is provided between the first extending portion <NUM> and the inner peripheral wall of the second suction cup <NUM>. The sidewall, close to the first welding surface <NUM>, of the first extending portion <NUM> forms a stepped surface with the first welding surface <NUM>.

As shown in <FIG>, the first extending portion <NUM> can extend along the circumferential direction of the first suction cup <NUM>. The outer diameter of the first extending portion <NUM> can be set to F and the inner diameter of the second suction cup <NUM> can be set to f, which needs to satisfy that f is greater than F. Thus, it can be realized that the first extending portion <NUM> is partially located in the cavity <NUM> of the second suction cup <NUM>, and the first extending portion <NUM> abutting against the inner peripheral wall of the second suction cup <NUM> can be used to realize the positioning and limiting of the mating connection of the first suction cup <NUM> and the second suction cup <NUM>.

As shown in <FIG> and <FIG>, there is a large angular difference between a plane where the flanging portion <NUM> is located and an extension plane of the part, close to the edge of the second suction cup <NUM>, of the first body portion <NUM>, so that a first transition portion <NUM> having a transitional connection function can be formed between the flanging portion <NUM> and the first body portion <NUM>. As shown in <FIG>, the wall thickness of the first body portion <NUM> can be set to At1, the wall thickness of the flanging portion <NUM> can be set to Ct1, the wall thickness of the first transition portion <NUM> can be set to Bt1, and the distance between the second welding surface <NUM> and the upper surface of the flanging portion <NUM> is Dt1 in the up and down direction (the "up and down" herein refers to the positive "up and down" direction in <FIG>), which needs to satisfy Bt1>At1.

In this way, the flanging portion <NUM> formed by folding the first body portion <NUM> can have a sufficient thickness to serve as a connecting portion between the first suction cup <NUM> and the second suction cup <NUM>. For Ct1>Dt1, it can be understood that the size difference between Ct1 and Dt1 is the portion of the first extending portion <NUM> that extends into the cavity <NUM> of the second suction cup <NUM>. By setting Ct1>Dt1, the first extending portion <NUM> can be partially disposed inside the cavity <NUM> of the second suction cup <NUM> for abutting fit with the inner peripheral wall of the second suction cup <NUM>.

As shown in <FIG> and <FIG>, the second suction cup <NUM> has an opening facing toward the third suction cup <NUM>, and the third suction cup <NUM> may also have an opening facing toward the second suction cup <NUM>. The third suction cup <NUM> may be connected to the second suction cup <NUM> to allow the opening of the third suction cup <NUM> to be in corresponding communication with the opening of the second suction cup <NUM> and defines a cavity <NUM>. The third suction cup <NUM> may include a second body portion <NUM>, the second body portion <NUM> is located below the opening of the second suction cup <NUM>, and the second body portion <NUM> is buckled with the opening of the second suction cup <NUM>.

As shown in <FIG> and <FIG>, a part, close to an edge of the second suction cup <NUM>, of the second body portion <NUM> may be folded towards the outside of the cavity <NUM> to form a folded portion <NUM>. A part of the folded portion <NUM> is located below the edge of the second suction cup <NUM>. A surface, located below the edge of the second suction cup <NUM>, of the part of the folded portion <NUM> can be provided with a third welding surface <NUM>. A surface, corresponding to the third welding surface <NUM>, on the edge of the second suction cup <NUM> can be provided with a fourth welding surface <NUM>. The third welding surface <NUM> is opposite to the fourth welding surface <NUM>, and the third welding surface <NUM> and the fourth welding surface <NUM> may be connected by a resistance welding process.

As shown in <FIG> and <FIG>, a part of the folded portion <NUM> may extend toward the cavity <NUM> of the second suction cup <NUM> to form a second extending portion <NUM>, and the second extending portion <NUM> can be located inside the peripheral wall of the second suction cup <NUM>. A gap is provided between the second extending portion <NUM> and the inner peripheral wall of the second suction cup <NUM>. As shown in <FIG>, the sidewall of the second extending portion <NUM> close to the third welding surface <NUM> form a stepped surface with the fourth welding surface <NUM>.

As shown in <FIG>, the second extending portion <NUM> may extend along the circumferential direction of the third suction cup <NUM>. The outer diameter of the second extending portion <NUM> can be set as E, and the inner diameter of the second suction cup <NUM> can be set as f, which needs to satisfy that f is greater than E. Thus, it can be realized that the second extending portion <NUM> is partially located in the cavity <NUM> of the second suction cup <NUM>, and the second extending portion <NUM> abutting against the inner peripheral wall of the second suction cup <NUM> can be used to realize the positioning and limiting of the mating connection of the third suction cup <NUM> and the second suction cup <NUM>. It should be noted that the second extending portion <NUM> can also be provided at the second suction cup <NUM>, and the second extending portion <NUM> can be partially located in the cavity <NUM> of the third suction cup <NUM>.

As shown in <FIG> and <FIG>, there is a large angular difference between a plane where the folded portion <NUM> is located and an extension plane of the part close to the edge of the second suction cup <NUM>, of the second body portion <NUM>, so that a second transition portion <NUM> having a transitional connection function can be formed between the folded portion <NUM> and the first body portion <NUM>. The second transition portion <NUM> may be in a circular arc shape.

As shown in <FIG>, the wall thickness of the second body portion <NUM> can be set to At2, the wall thickness of the folded portion <NUM> can be set to Ct2, the wall thickness of the second transition portion <NUM> can be set to Bt2, and the distance between the fourth welding surface <NUM> and the bottom surface of the folded portion <NUM> is Dt2 in the up and down direction (the "up and down" herein refers to the positive "up and down" direction in <FIG>), which needs to satisfy that Bt2>At2. In this way, the folded portion <NUM> formed by folding the second body portion <NUM> can have a sufficient thickness to serve as a connecting portion between the third suction cup <NUM> and the second suction cup <NUM>. For Ct2>Dt2, it can be understood that the size difference between Ct2 and Dt2 is the portion of the second extending portion <NUM> that extends into the cavity <NUM> of the second suction cup <NUM>. By setting Ct2>Dt2, the second extending portion <NUM> can be partially disposed inside the cavity <NUM> of the second suction cup <NUM> for abutting fit with the inner peripheral wall of the second suction cup <NUM>.

As shown in <FIG>, a sharp corner <NUM> may be formed at the edge, close to the flanging portion <NUM>, of the second suction cup <NUM>, in which the size of the sharp corner <NUM> can be set to a, which can satisfy <NUM>°≤a≤<NUM>°, preferably <NUM>°≤a≤<NUM>°. As shown in <FIG>, a sharp corner <NUM> may be also formed at the edge, close to the folded portion <NUM>, of the second suction cup <NUM>, in which the size of the sharp corner <NUM> can be set to a, which can satisfy <NUM>°≤a≤<NUM>°, preferably <NUM>°≤a≤<NUM>°. By providing the sharp corner <NUM>, it is convenient to provide operation space for the welding process, and the welding surface can be formed as a bending surface, which is beneficial to increase the contact surface of welding, and thus can improve the strength of welding connection.

As shown in <FIG>, a first suction tube <NUM> that can communicate with the cavity <NUM> can be provided above the first suction cup <NUM> to connect the cavity <NUM> with the outside. A filter assembly <NUM> capable of filtering impurities can be provided below the first suction cup <NUM>. The filter assembly <NUM> can be pressed into the cavity <NUM> of the second suction cup <NUM> by external force at a position close to the first suction cup <NUM>. A rolling groove structure can be formed on the peripheral wall of the second suction cup <NUM> at positions corresponding to the upper and lower ends of the filter assembly <NUM>. The rolling groove structure is distributed along the circumferential direction of the second suction cup <NUM>, and can play a role in positioning and limiting the installation of the filter assembly <NUM>.

As shown in <FIG>, a second suction tube <NUM> that can communicate with the cavity <NUM> can be provided under the third suction cup <NUM> to connect the cavity <NUM> with the outside. A filter assembly <NUM> capable of filtering impurities can be provided above the third suction cup <NUM>. The filter assembly <NUM> can be pressed into the cavity <NUM> of the second suction cup <NUM> by external force at a position close to the third suction cup <NUM>. A rolling groove structure can be formed on the peripheral wall of the second suction cup <NUM> at positions corresponding to the upper and lower ends of the filter assembly <NUM>. The rolling groove structure is distributed along the circumferential direction of the second suction cup <NUM>, and can play a role in positioning and limiting the installation of the filter assembly <NUM>.

In the description of the present disclosure, it should be understood that the terms "upper", "lower", "horizontal", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship is that shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the pointed device or element has to have a specific orientation, and be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the "plurality" means two or more than two, unless otherwise specifically defined.

In the present disclosure, the terms "disposed", "arranged", "connected", "fixed" and the like should be understood broadly and may be either a fixed connection or a detachable connection, or an integration; may be a mechanical connection, or an electrical connection; may be directly connected, or connected via an intermediate medium; and may be the internal communication of two elements or the interaction of two elements, unless otherwise explicitly stated and defined. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

In the present disclosure, a first feature "on" or "under" a second feature may refer to a direct contact of the first feature with the second feature or an indirect contact of the first feature and the second feature via an intermediate medium, unless otherwise explicitly stated and defined. Moreover, a first feature "above" a second feature may mean the first feature is right above or obliquely above the second feature, or merely that the first feature is located at a level higher than the second feature. A first feature "below" a second feature may mean the first feature is just below or obliquely below the second feature, or merely that the first feature is located at a level lower than the second feature.

Claim 1:
A compressor liquid accumulator (<NUM>), comprising a first suction cup (<NUM>) and a second suction cup (<NUM>), wherein
a surface, facing the second suction cup (<NUM>), of the first suction cup (<NUM>) is provided with a first welding surface (<NUM>), a surface, facing the first suction cup (<NUM>), of the second suction cup (<NUM>) is provided with a second welding surface (<NUM>), and the first welding surface (<NUM>) and the second welding surface (<NUM>) are connected in a welded manner,
the first suction cup (<NUM>) and the second suction cup (<NUM>) define a cavity (<NUM>), and
the first suction cup (<NUM>) is provided with a first extending portion (<NUM>), wherein the first extending portion (<NUM>) is adjacent to the first welding surface (<NUM>) and located in the cavity (<NUM>) defined by the second suction cup (<NUM>);
wherein a sidewall of the first extending portion (<NUM>) forms a stepped surface with the first welding surface (<NUM>) and characterized in that a gap is provided between the first extending portion (<NUM>) and an inner peripheral wall of the second suction cup (<NUM>).