Patent Description:
A connection pipe assembly of a compressor includes a guide pipe connected to a compressor body, a suction pipe disposed on a reservoir, and a connection pipe. The connection pipe is disposed in the guide pipe and extends into the compressor body to be brought into communication with a compression cavity. The suction pipe of the reservoir is disposed in the connection pipe. Welding is applied to a fixed connection between the guide pipe and the connection pipe, and likewise to a fixed connection between the connection pipe and the suction pipe of the reservoir. In the related art, the connection pipe, the guide pipe, and the suction pipe are generally copper pipes due to better thermal conductivity of the copper pipe. However, in addition to high cost of the copper pipe, uniform distribution of solder in a welding gap is necessarily a guarantee of a welding quality when the copper pipe is welded. As a result, the welding is inefficient. <CIT> discloses an assembling method for a liquid storage device and a compressor. The assembling method comprises the steps that an outer connecting pipe is welded with a housing; an air cylinder is loaded in the housing; an inner connecting pipe is connected with the inner side of the outer connecting pipe in a sleeving manner; a first end of the inner connecting pipe is pressed into an air inlet of the air cylinder; the inner connecting pipe is a copper pipe or a coppering steel pipe; the excircle of the inner connecting pipe is in interference fit with the air inlet; an air outlet of the air inlet pipe stretches into a second end of the inner connecting pipe; a second end of the outer connecting pipe is welded with the inner connecting pipe; the outer connecting pipe is a copper pipe or a steel pipe with the second end being subjected to coppering treatment; the second end of the inner connecting pipe is welded with the air inlet pipe; and the air inlet pipe is a steel pipe with a welding part being subjected to the coppering treatment. <CIT> discloses a compression element located inside an enclosed compressor for receiving a connection pipe from outside the compressor. The compressor has an opening one in one of its walls. The compression element has a bore running through it. An inlet end of the compression element is joined to the wall of the compressor at the opening. The inlet end of said bore is tapered in the form of a curved shape that spreads smoothly toward the opening. A guide pipe has one of its ends installed into the opening from outside the compressor. A connection pipe having a cooper plated exterior surface is inserted through the guide pipe, pressfitted into the inlet end of the compression element and joined to the compression element. The connection pipe has another end connected to a suction pipe for circulating a refrigerant within the compressor via the compression element. <CIT> provides an internal structure for connecting a liquid storage device and an air cylinder and a compressor. Wherein the liquid storage device comprises a bent pipe, the air cylinder is arranged in the shell, an air suction hole is formed in the air cylinder, an opening corresponding to the air suction hole is formed in the shell, the liquid storage device further comprises an inner connecting pipe, one end of the inner connecting pipe is inserted into the air suction hole of the air cylinder, and the other end of the inner connecting pipe, the opening in the shell and the bent pipe of the liquid storage device are fixedly connected through welding.

The above-mentioned content is merely intended to assist in understanding the technical solutions of the present disclosure, and does not represent an admission that the above-mentioned content is the related art.

In one embodiment of the present disclosure, a compressor aiming to solve technical problems of lower welding efficiency and high cost of a connection pipe assembly in an existing compressor is provided.

To achieve the above embodiment, the present disclosure provides a compressor. The compressor includes: a compressor body, a reservoir and a connection pipe. the compressor body includes a housing and a compression assembly disposed in the housing. A compression cavity being defined by the compression assembly and having an air suction port, and a guide pipe being disposed at the housing. The reservoir includes a suction pipe and a connection pipe disposed in the guide pipe. A first end of the connection pipe is connected to the air suction port. The suction pipe is disposed in the connection pipe and connected to a second end of the connection pipe. The connection pipe is a copper pipe; and each of the suction pipe and the guide pipe is a steel pipe.

According to the invention, an inner surface of the connection pipe is spaced apart from an outer surface of the suction pipe to form a first welding gap; and an outer surface of the connection pipe is spaced apart from an inner surface of the guide pipe to form a second welding gap. A width of the first welding gap is smaller than a width of the second welding gap.

In one embodiment, the width of the first welding gap is smaller than or equal to <NUM>; and/or the width of the second welding gap is greater than or equal to <NUM>.

In one embodiment, the width of the first welding gap is greater than or equal to <NUM>.

In one embodiment, the width of the second welding gap is smaller than or equal to <NUM>.

In one embodiment, the connection pipe is fixedly connected to the suction pipe through high-frequency induction brazing; and the connection pipe is fixedly connected to the guide pipe through the high-frequency induction brazing.

According to the invention, the connection pipe includes a position limit section and a flare section. The flare section extends from the position limit section and in a direction facing away from the compressor body. The first welding gap includes a first sub-gap and a second sub-gap. The first sub-gap is formed between an inner surface of the position limit section and the outer surface of the suction pipe. The second sub-gap is formed between an inner surface of the flare section and the outer surface of the suction pipe. A width of the first sub-gap is smaller than or equal to a width of the second sub-gap.

In one embodiment, the flare section has an inner diameter greater than an inner diameter of the position limit section; and a stepped surface is formed between the inner surface of the flare section and the inner surface of the position limit section.

In one embodiment, the flare section has a cross section gradually flaring in a direction facing away from the position limit section.

In one embodiment, the connection pipe further includes a neck section connected to an end of the position limit section facing away from the flare section. The neck section has an inner diameter smaller than an inner diameter of the position limit section and greater than an inner diameter of the suction pipe, and a stop surface is formed between an inner surface of the neck section and the inner surface of the position limit section.

In one embodiment, the connection pipe further includes a connection section. An end of the connection section is connected to an end of the neck section facing away from the position limit section, and another end of the connection section is of a conical shape and in interference fit with the air suction port.

The present disclosure further provides a refrigeration apparatus. The refrigeration apparatus includes a compressor body including a housing and a compression assembly disposed in the housing. A compression cavity being defined by the compression assembly and having an air suction port, and a guide pipe being disposed at the housing; a reservoir including a suction pipe. A connection pipe disposed in the guide pipe, a first end of the connection pipe being connected to the air suction port, and the suction pipe being disposed in the connection pipe and connected to a second end of the connection pipe, the connection pipe is a copper pipe; and each of the suction pipe and the guide pipe is a steel pipe.

The compressor according to the present disclosure includes the compressor body, the reservoir, and a connection pipe. The compressor body includes the housing and the compression assembly disposed in the housing. The compression cavity is defined by the compression assembly and has the air suction port, and the guide pipe is disposed at the housing. The reservoir includes the suction pipe. The connection pipe is disposed in the guide pipe. The first end of the connection pipe is connected to the air suction port, and the suction pipe is disposed in the connection pipe and connected to the second end of the connection pipe. The connection pipe is a copper pipe; and each of the suction pipe and the guide pipe is the steel pipe. In this way, the cost can be reduced due to decreased use of the copper pipe. Meanwhile, the welding efficiency can be improved, and a welding quality of a product is ensured.

In order to clearly explain technical solutions of embodiments of the present disclosure or technical solutions in the related art, drawings used in description of the embodiments or the related art will be briefly described below. The drawings described below merely illustrate some embodiments of the present disclosure. Based on these drawings, other drawings can be obtained by those skilled in the art without creative effort.

Implementation, functional characteristics, and advantages of the present disclosure will be further described with reference to the accompanying drawings.

It should be noted that, if embodiments of the present disclosure relate to descriptions such as "first" and "second", the "first" or "second" is only for descriptive purposes, rather than indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" or "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and/or" as it appears throughout the present disclosure is that three concurrent solutions are included. For example, "A and/or B" includes a solution A, or a solution B, or solutions where both A and B are satisfied.

The present disclosure provides a compressor.

In embodiments of the present disclosure, as illustrated in <FIG>, the compressor includes a compressor body <NUM>, a reservoir <NUM>, and a connection pipe <NUM>. The compressor body <NUM> includes a housing <NUM> and a compression assembly <NUM> disposed in the housing <NUM>. A compression cavity is defined by the compression assembly <NUM> and has an air suction port, and a guide pipe <NUM> is formed in the housing <NUM>. The reservoir <NUM> includes a suction pipe <NUM>. The connection pipe <NUM> is disposed in the guide pipe <NUM>. A first end of the connection pipe <NUM> is connected to the air suction port, and the suction pipe <NUM> is disposed in the connection pipe <NUM> and is connected to a second end of the connection pipe <NUM>. The connection pipe <NUM> is a copper pipe, and each of the suction pipe <NUM> and the guide pipe <NUM> is a steel pipe.

In one embodiment, the compressor body <NUM> includes the housing <NUM>, the compression assembly <NUM>, and a motor assembly. An accommodation cavity is formed in the housing <NUM>, and the compression assembly <NUM> and the motor assembly are disposed in the accommodation cavity. The housing <NUM> is a sealed container and may include an upper housing <NUM>, a lower housing <NUM>, and an outer housing <NUM>. The outer housing <NUM> is of a run-through tub shape from top to bottom, and the upper housing <NUM> and the lower housing <NUM> are disposed at an upper end and a lower end of the outer housing <NUM>, respectively. The compression assembly <NUM> includes a crankshaft, an air cylinder, a piston, a main bearing, an auxiliary bearing, a slidable sheet, etc., and one or more air cylinders may be provided, which is not specifically limited herein. The main bearing and the auxiliary bearing are disposed at an upper end and a lower end of the air cylinder, respectively. When a plurality of air cylinders is provided and are sequentially arranged up and down, the main bearing is disposed at an upper end of an air cylinder at an uppermost end, and the auxiliary bearing is disposed at a lower end of an air cylinder at a lowermost end. The compression cavity is defined by the compression assembly <NUM>. The air cylinder has air suction port in communication with the compression cavity, and the main bearing and/or the auxiliary bearing has an air discharge port in communication with the compression cavity. The crankshaft is engaged with each of the main bearing and the auxiliary bearing and is rotatably disposed in the housing <NUM>. The piston is eccentrically and rotatably disposed in the air cylinder, the crankshaft is connected to the piston to drive the piston to eccentrically rotate, and the crankshaft drives the piston to rotate and compress a refrigerant in the air cylinder. A spring is compressed at a back side of the slidable sheet to enable a front side of the slidable sheet to be connected to an outer circumference of the piston, and an interior of the air cylinder is divided into a high-pressure cavity and a low-pressure cavity through the slidable sheet. Since the refrigerant is compressed through the rotation of the piston, a pressure in the high-pressure cavity is increased. When the pressure in the high-pressure cavity rises to be slightly greater than an external pressure of the compression assembly <NUM>, a high-pressure gas refrigerant can be discharged through the air discharge port. The motor assembly includes a stator and a rotor. The stator is fixed on the housing <NUM>, the rotor can rotate relative to the stator, and an upper end of the crankshaft extends out from the main bearing and then is fixedly connected to the rotor to rotate synchronously with the rotor. After the motor assembly is started, a magnetic field is generated, the magnetic field generates an electromagnetic force on the rotor to drive the rotor to rotate, and the crankshaft can be driven to rotate after the rotor rotates. During the rotation of the crankshaft, the piston is driven by the crankshaft to rotate eccentrically, hence a position of a hollow cavity between the piston and the air cylinder also changes. In this way, a gaseous refrigerant is compressed to form the high-pressure gas.

The reservoir <NUM> includes a casing <NUM> and the suction pipe <NUM>. An end of the suction pipe <NUM> extends into the casing <NUM>, and another end of the suction pipe <NUM> extends out of a bottom end of the casing <NUM> and is connected to the air suction port of the compression assembly <NUM> via the connection pipe <NUM>, therefore the gaseous refrigerant in the casing <NUM> is transmitted into the compression cavity of the compression assembly <NUM>. In one embodiment, the connection pipe <NUM> is disposed in the guide pipe <NUM>, a first end of the connection pipe <NUM> is connected to the air suction port, and the suction pipe <NUM> is disposed in the connection pipe <NUM> and is connected to a second end of the connection pipe <NUM>. The connection pipe <NUM> is a copper pipe. The connection pipe is softer due to a copper material, which is conducive to preventing the air suction port of the compression assembly <NUM> from deforming. Each of the suction pipe <NUM> and the guide pipe <NUM> is a steel pipe. On the one hand, use of the copper pipe is reduced, and the cost is reduced. On the other hand, the connection pipe <NUM> and the suction pipe <NUM> can be welded and fixed through an operation of high-frequency induction brazing, and likewise the connection pipe <NUM> and the guide pipe <NUM>. The operation of high-frequency induction brazing is to place a welding ring (such as a copper-zinc welding ring, but not limited thereto) in a welding gap and then perform welding. Due to use of a solder of the welding ring, the welding ring itself has a weight and can be well attached to the welding gap, and the solder at each position of the welding gap can be uniformly distributed. In this way, the welding efficiency can be improved, and the welding quality is ensured. In the related art, since each of the connection pipe <NUM>, the suction pipe <NUM>, and the guide pipe <NUM> is the copper pipe, the copper pipe is generally welded through an operation of flame brazing. When the operation of the flame brazing is performed, uniform distribution of the solder in the welding gap is necessarily a guarantee of the welding quality due to use of strip-shaped solder. As a result, the welding is often inefficient.

The compressor according to the present disclosure includes the compressor body <NUM>, the reservoir <NUM>, and a connection pipe <NUM>. The compressor body <NUM> includes the housing <NUM> and the compression assembly <NUM> disposed in the housing <NUM>. The compression cavity is defined by the compression assembly <NUM> and has the air suction port, and the guide pipe <NUM> is disposed at the housing <NUM>. The reservoir <NUM> includes the suction pipe <NUM>. The connection pipe <NUM> is disposed in the guide pipe <NUM>. The first end of the connection pipe <NUM> is connected to the air suction port, and the suction pipe <NUM> is disposed in the connection pipe <NUM> and connected to the second end of the connection pipe <NUM>. The connection pipe <NUM> is a copper pipe; and each of the suction pipe <NUM> and the guide pipe <NUM> is the steel pipe. In this way, the cost can be reduced due to decreased use of the copper pipe. Meanwhile, the welding efficiency can be improved, and the welding quality of a product is ensured.

With reference to <FIG>, in one embodiment, an inner surface of the connection pipe <NUM> is spaced apart from an outer surface of the suction pipe <NUM> to form a first welding gap <NUM>, and an outer surface of the connection pipe <NUM> is spaced apart from an inner surface of the guide pipe to form a second welding gap <NUM>. A width of the first welding gap <NUM> is smaller than a width of the second welding gap <NUM>.

In this embodiment, the width of the first welding gap <NUM> is smaller than the width of the second welding gap <NUM>. On the one hand, an excessive inclination of the suction pipe <NUM> of the reservoir <NUM> can be limited in the connection pipe <NUM>, therefore avoiding that an excessively small width of the first welding gap <NUM> can be avoided for the suction pipe <NUM> of the reservoir <NUM> located inside the connection pipe <NUM> is completely attached to an inner wall face of the connection pipe <NUM>, and thus the welding quality is guaranteed. On the other hand, the solder in the first welding gap <NUM> can also be prevented from flowing into an interior of the connection pipe <NUM> along the first welding gap <NUM>.

In one embodiment, the width of the first welding gap <NUM> is smaller than or equal to <NUM>; and/or the width of the second welding gap <NUM> is greater than or equal to <NUM>.

By setting the width of the first welding gap <NUM> to be smaller than or equal to <NUM>, the excessive inclination or excessive displacement of the suction pipe <NUM> of the reservoir <NUM> located inside the connection pipe <NUM> can be effectively avoided, and an enough welding gap between the suction pipe <NUM> of the reservoir <NUM> and the connection pipe <NUM> can be ensured consistently. In this way, the welding quality can be further guaranteed. Meanwhile, the smaller welding gap can increase resistance when the solder flows into the connection pipe <NUM> from the first welding gap, therefore the solder is prevented from flowing into the connection pipe <NUM> through the first welding gap <NUM> and thus the product quality is not affected. The width of the second welding gap <NUM> is greater than or equal to <NUM>, therefore it can be ensured that solder can fully flow in the second welding gap <NUM> during welding. In this way, sufficient filling of the solder is guaranteed to avoid stability of the welding is affected due to insufficient solder filling.

Further, the width of the first welding gap <NUM> is greater than or equal to <NUM>. The width of the first welding gap <NUM> may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, etc. Welding fastness between the connection pipe <NUM> and the suction pipe <NUM> of the reservoir <NUM> is reduced in the case that the width of the first welding gap <NUM> is too large. The width of the second welding gap <NUM> is smaller than or equal to <NUM>. The width of the second welding gap <NUM> may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, etc. The solder is wasted in the case that the width of the second welding gap <NUM> is too large.

In the embodiments of the present disclosure, the second end of the connection pipe <NUM> may have a plurality of structures. For example, the second end of the connection pipe <NUM> may be a straight pipe or a substantially straight pipe. The second end of the connection pipe <NUM> may also be a conical pipe. As illustrated in <FIG>, in one embodiment, the connection pipe <NUM> includes a position limit section <NUM> and a flare section <NUM> extending from the position limit section <NUM> and in a direction facing away from the compressor body. The first welding gap <NUM> includes a first sub-gap and a second sub-gap. The first sub-gap is formed between an inner surface of the position limit section <NUM> and the outer surface of the suction pipe <NUM>. The second sub-gap is formed between an inner surface of the flare section <NUM> and the outer surface of the suction pipe <NUM>. A width of the first sub-gap is smaller than or equal to a width of the second sub-gap.

By setting the width of the first sub-gap to be smaller than the width of the second sub-gap, the position limit section <NUM> can limit a position of the suction pipe <NUM> of the reservoir <NUM> to limit the excessive inclination of the suction pipe <NUM> of the reservoir <NUM> located inside the position limit section <NUM>. Furthermore, the excessively small width of the first welding gap can be avoided for the suction pipe <NUM> of the reservoir <NUM> located inside the connection pipe <NUM> is completely attached to the inner wall face of the connection pipe <NUM>, and thus the welding quality is guaranteed. In addition, by setting the width of the first sub-gap to be smaller than the width of the second sub-gap, a part of the suction pipe <NUM> extending into the connection pipe <NUM> is substantially the straight pipe, that is, an inner diameter of the position limit section <NUM> is smaller than an inner diameter of the flare section <NUM>. In this case, resistance of the solder flowing from the width of the second sub-gap to the width of the first sub-gap is increased to prevent the solder from flowing from the width of the first sub-gap to the inside of the connection pipe <NUM>. It should be explained that the width of the first sub-gap is a radial distance difference between the inner surface of the position limit section <NUM> and the outer surface of the suction pipe <NUM>, and the width of the second sub-gap is a radial distance difference between the inner surface of the flare section <NUM> and the outer surface of the suction pipe <NUM>.

The structure of the position limit section <NUM> and the flare section <NUM> of the connection pipe <NUM> will be described in detail below.

With reference to <FIG>, in one embodiment, the inner diameter of the flare section <NUM> is greater than the inner diameter of the position limit section <NUM>, and the flare section <NUM> and the position limit section <NUM> are disposed in a stepped shape. In one embodiment, the flare section <NUM> and the position limit section <NUM> are two hollow pipes with different inner diameters. The inner diameter of the flare section <NUM> is larger than the inner diameter of the position limit section <NUM>, and a stepped surface <NUM> is formed between the inner surface of the flare section <NUM> and the inner surface of the position limit section <NUM>. As a result, when the solder flows from the second sub-gap to the first sub-gap, resistance to flow of the solder is increased due to obstruction of the stepped surface <NUM>. Therefore, the solder can be prevented from flowing into the first sub-gap from the second sub-gap, and the solder is prevented from flowing into the connection pipe <NUM> from the first sub-gap. In addition, the suction pipe <NUM> of the reservoir <NUM> is inserted into the position limit section <NUM>, and a larger width of the second sub-gap is formed between the suction pipe <NUM> of the reservoir <NUM> and the flare section <NUM>, therefore an opening of the width of the second sub-gap is large enough to be filled with the solder. Moreover, since the second sub-gap has a sufficient depth, the solder is uniformly distributed in the width of the second sub-gap. In this way, undesirable phenomena such as missing of solder and skewness of the welding can be avoided to ensure the welding quality between the suction pipe <NUM> of the reservoir <NUM> and the connection pipe <NUM>.

With reference to <FIG>, in another embodiment, a cross section of the flare section <NUM> is gradually flaring in a direction facing away from the position limit section <NUM>. That is, an angle is formed between a side wall of the flare section <NUM> and an axial line of the flare section <NUM>. In this embodiment, the flare section <NUM> is in smooth transition connection to the position limit section <NUM>, and the flare section <NUM> is a pipe structure which is roughly conical in shape. Since the cross section of the flare section <NUM> is gradually flaring in the direction facing away from the position limit section <NUM>, the second gap formed between the outer surface of the suction pipe <NUM> of the reservoir <NUM> and the inner surface of the flare section <NUM> is gradually flaring in the direction facing away from the position limit section <NUM>. As a result, the opening of the width of the second sub-gap is large enough to facilitate filling of the solder. Moreover, since the flare section <NUM> has a sufficient depth, the solder can be uniformly distributed in the width of the second sub-gap and has a sufficient fusion depth. In this way, the undesirable phenomena such as the missing of solder and skewness of the welding can be avoided to further ensure the welding quality.

In one embodiment, the angle between the side wall of the flare section <NUM> and the axial line of the flare section <NUM> is greater than or equal to <NUM>° and smaller than or equal to <NUM>°.

In this embodiment, since the angle between the side wall of the flare section <NUM> and the axial line of the flare section <NUM> is greater than or equal to <NUM>° and smaller than or equal to <NUM>°, it can be ensured that the width of the second sub-gap is greater than the width of the first sub-gap, guaranteeing the required gap between the suction pipe <NUM> of the reservoir <NUM> and the connection pipe <NUM> during the welding, and further guaranteeing the reliability of the welding between the suction pipe <NUM> of the liquid reservoir <NUM> and the connection pipe <NUM>. Furthermore, it is also possible to avoid that the excessively large width of the second sub-gap is too large since the excessive inclination of the side wall of the flare section <NUM>, causing waste due to excessive filling of the solder, and even causing the solder flowing out from the width of the second sub-gap to have an effect of the welding quality. The present solution is not limited thereto, it can be understood that, based on actual requirements of the product, those skilled in the art can finely adjust the angle between the side wall of the flare section <NUM> and the axial line of the flare section <NUM> out of the range from <NUM>° to <NUM>° as appropriate, and this specific aspect thereof will be no longer enumerated herein, but belongs to a protecting scope of the present solution without departing from the concept of the present design.

With continued reference to <FIG>, further, in one embodiment, the connection pipe <NUM> further includes a neck section <NUM> connected to an end of the position limit section <NUM> facing away from the flare section <NUM>. The neck section <NUM> has an inner diameter smaller than an inner diameter of the position limit section <NUM> and greater than an inner diameter of the suction pipe <NUM>, and a stop surface <NUM> is formed between an inner surface of the neck section <NUM> and the inner surface of the position limit section <NUM>. When the suction pipe <NUM> of the reservoir <NUM> is inserted into the connection pipe <NUM>, the stop surface <NUM> can have a stop and position limit function to limit an insertion depth of the suction pipe <NUM>, therefore the welding fastness between the suction pipe <NUM> and the connection pipe <NUM> can be further ensured. In one embodiment, the stop surface <NUM> may be a plane perpendicular to the axial line of the connection pipe <NUM>, or may be an inclined surface at a certain inclination angle relative the axial line of the connection pipe <NUM>, which is not specifically limited herein, as long as has the stop and position limit function for the suction pipe <NUM> of the reservoir <NUM>.

With reference to <FIG>, the connection pipe <NUM> further includes a connection section <NUM>. An end of the connection section <NUM> is connected to an end of the neck section <NUM> facing away from the position limit section <NUM>, and another end of the connection section <NUM> is of a conical shape and in communication with the air suction port. In one embodiment, the connection section <NUM> is in interference fit with the air suction port. In this embodiment, since the connection pipe <NUM> is connected to the air suction port through the means of the interference fit, the connection pipe <NUM> configured as the copper pipe can prevent the air cylinder from deforming when the connection pipe <NUM> is inserted into the air suction port of the air cylinder.

With reference to <FIG>, in one embodiment, the end of the guide pipe <NUM> facing away from the compressor body <NUM> is flared. In this case, by setting an opening of the guide pipe <NUM> as a flare opening, an opening of the second welding gap <NUM> is large enough to facilitate filling of the solder. In this way, it is propitious to ensure the welding fastness between the guide pipe <NUM> and the connection pipe <NUM>.

In the embodiments of the present disclosure, the casing <NUM> of the reservoir <NUM> may have a plurality of structures. For example, the housing <NUM> includes a body, an upper suction cup, and a lower suction cup, which is not limited thereto. The body forms a run-through tub shape from top to bottom, and the upper suction cup and the lower suction cup are disposed at an upper end and a lower end of the body, respectively, to form a closed liquid storage cavity with the body.

In one embodiment, the suction pipe <NUM> includes a first sub-suction pipe <NUM> and a second sub-suction pipe <NUM>. The first sub-suction pipe <NUM> is disposed at a bottom end of the casing <NUM>, the second sub-suction pipe <NUM> is connected to a first end of the first sub-suction pipe <NUM> and extends into the casing <NUM>, and a second end of the first sub-suction pipe <NUM> is connected to the air suction port of the air cylinder via the guide pipe <NUM>. Therefore, the gaseous refrigerant in the casing <NUM> is transmitted into the compression cavity of the compression assembly <NUM>. Further, the suction pipe <NUM> further includes a third sub-suction pipe <NUM>. The third sub-suction pipe <NUM> is disposed at a top end of the casing <NUM> and is in communication with the liquid storage cavity, and a free end of the third sub-suction pipe <NUM> is connected to other pipelines to input the refrigerant into the reservoir <NUM>. In addition, the reservoir <NUM> further includes a filter disposed in the liquid storage cavity. In one embodiment, the filter is mounted on the upper suction cup, and a pipe orifice at the free end of the second sub-suction pipe <NUM> is close to the filter. The refrigerant in the liquid storage cavity sequentially passes through the second sub-suction pipe <NUM> and the first sub-pipe suction pipe <NUM> and is sucked into the compression cavity of the air cylinder.

Claim 1:
A compressor, comprising:
a compressor body (<NUM>) comprising a housing (<NUM>) and a compression assembly (<NUM>) disposed in the housing (<NUM>), a compression cavity being defined by the compression assembly (<NUM>) and having an air suction port, and a guide pipe (<NUM>) being disposed at the housing (<NUM>);
a reservoir (<NUM>) comprising a suction pipe (<NUM>); and
a connection pipe (<NUM>) disposed in the guide pipe (<NUM>), a first end of the connection pipe (<NUM>) being connected to the air suction port, and the suction pipe (<NUM>) being disposed in the connection pipe (<NUM>) and connected to a second end of the connection pipe (<NUM>), wherein:
the connection pipe (<NUM>) is a copper pipe; and
each of the suction pipe (<NUM>) and the guide pipe (<NUM>) is a steel pipe,
wherein: the connection pipe (<NUM>) comprises a position limit section (<NUM>),
an inner surface of the connection pipe (<NUM>) is spaced apart from an outer surface of the suction pipe (<NUM>) to form a first welding gap (<NUM>); and
an outer surface of the connection pipe (<NUM>) is spaced apart from an inner surface of the guide pipe (<NUM>) to form a second welding gap (<NUM>), characterized in that a width of the first welding gap (<NUM>) is smaller than a width of the second welding gap (<NUM>),
the connection pipe (<NUM>) comprises a flare section (<NUM>), the flare section (<NUM>) extending from the position limit section (<NUM>) in a direction facing away from the compressor body (<NUM>); and
the first welding gap (<NUM>) comprises a first sub-gap formed between an inner surface of the position limit section (<NUM>) and the outer surface of the suction pipe (<NUM>), and a second sub-gap formed between an inner surface of the flare section (<NUM>) and the outer surface of the suction pipe (<NUM>), a width of the first sub-gap being smaller than a width of the second sub-gap.