EP4692685A1

EP4692685A1 - Condenser provided with oil separation structure therein

Info

Publication number: EP4692685A1
Application number: EP24778282.4A
Authority: EP
Inventors: Lu MEI; Xiuping Su; Xiaokui MA; Li Wang
Original assignee: Tyco Fire and Security GmbH; York Wuxi Air Conditioning and Refrigeration Co Ltd
Current assignee: Tyco Fire and Security GmbH; York Wuxi Air Conditioning and Refrigeration Co Ltd
Priority date: 2023-03-30
Filing date: 2024-03-29
Publication date: 2026-02-11
Also published as: TW202441115A; CN116336700A; KR20260016468A; WO2024199497A1

Abstract

The present application provides a condenser provided with an oil separation structure inside. The condenser includes a shell and the oil separation structure. The shell includes length, width, and height directions, defines an accommodating cavity, and is provided with at least one inlet pipe to receive a refrigerant to be condensed containing lubricating oil. The oil separation structure is fixed in the accommodating cavity and includes a separation chamber for separating the lubricating oil and a refrigerant gas in the refrigerant. The at least one inlet pipe extends into the separation chamber. The accommodating cavity includes first and second condensation chambers which are separated by the oil separation structure, are respectively located on two sides of the separation chamber in the width direction of the shell, and respectively extend in the length direction of the shell. An upper part of the oil separation structure is provided with first and second gas discharge ports which respectively make the first and second condensation chambers in fluid communication with the separation chamber, so that the refrigerant gas separated by the separation chamber can enter the first and second condensation chambers to be condensed, and a bottom of the oil separation structure is provided with at least one oil discharge port, so that the lubricating oil separated by the separation chamber can be discharged from the separation chamber.

Description

Technical Field

The present application relates to a condenser, in particular to a condenser provided with an oil separation structure inside.

Background Art

A refrigeration and air conditioning system includes a condenser for condensing a high-temperature high-pressure gas-phase refrigerant discharged from a compressor into a medium-temperature high-pressure liquid-phase refrigerant. In a screw compressor, lubricating oil is required between rotors to reduce a compressor noise. At the same time, the lubricating oil can reduce a gas leakage during a rotor meshing process, improving compressor performance. Thus, during an actual operation process of the screw compressor, a gas discharged from the compressor includes freezing oil droplets in addition to a gas-phase refrigerant. If excessive lubricating oil enters the condenser and an evaporator, it not only causes an oil shortage in an oil supply system, increasing damage to a moving part of the compressor due to the oil shortage, but also causes excessive lubricating oil to adhere to a heat exchange pipe in a thin film state, causing a heat exchange effect of the entire refrigeration and air conditioning system to fail to reach a designed state. Therefore, an oil separation structure needs to be disposed to separate the gas-phase refrigerant and oil liquid discharged from the compressor. The separated oil liquid is then returned to a compressor oil tank for use by the compressor.

Summary of the Invention

The present application provides a condenser including a built-in oil separation structure. The built-in oil separation structure in the condenser provides an excellent oil separation, and the condenser provides excellent heat exchange efficiency.
According to one aspect of the present application, the present application provides a condenser provided with an oil separation structure inside. The condenser includes a shell and the oil separation structure. The shell defines an accommodating cavity, the shell is provided with at least one inlet pipe for receiving a refrigerant to be condensed containing lubricating oil, and the shell includes a length direction, a height direction, and a width direction. The oil separation structure is fixed in the accommodating cavity, the oil separation structure includes a separation chamber, and the at least one inlet pipe extends into the separation chamber, wherein the separation chamber is configured to separate the lubricating oil and a refrigerant gas in the refrigerant. The accommodating cavity includes a first condensation chamber and a second condensation chamber which are separated by the oil separation structure, and the first condensation chamber and the second condensation chamber are respectively located on two sides of the separation chamber in the width direction of the shell, and respectively extend in the length direction of the shell. An upper part of the oil separation structure is provided with a first gas discharge port and a second gas discharge port which respectively make the first condensation chamber and the second condensation chamber in fluid communication with the separation chamber, so that the refrigerant gas separated by the separation chamber can enter the first condensation chamber and the second condensation chamber to be condensed, and a bottom of the oil separation structure is provided with at least one oil discharge port, so that the lubricating oil separated by the separation chamber can be discharged from the separation chamber.
In the condenser provided with the oil separation structure inside as described above, the separation chamber is centrally arranged in the accommodating cavity in the width direction of the shell.
In the condenser provided with the oil separation structure inside as described above, the oil separation structure includes a plurality of vertical separation plates disposed in the separation chamber at intervals in the length direction of the shell, and the plurality of vertical separation plates are each arranged transversely to an extension direction of the separation chamber. At least a part of the plurality of vertical separation plates are disposed to block an upper fluid passage in the separation chamber, and at least another part of the plurality of vertical separation plates are disposed to block a lower fluid passage in the separation chamber.
In the condenser provided with the oil separation structure inside described above, on one side of the first gas discharge port and the second gas discharge port, the at least a part of the vertical separation plates which block the upper fluid passage in the separation chamber and the at least another part of the vertical separation plates which block the lower fluid passage in the separation chamber are alternately arranged.
In the condenser provided with the oil separation structure inside as described above, the at least one inlet pipe is centrally arranged at a top of the shell in the width direction of the shell.
In the condenser provided with the oil separation structure inside as described above, a part of the at least one inlet pipe extending into the separation chamber extends in the height direction of the shell. The oil separation structure further includes a transverse separation plate located below the at least one inlet pipe.
In the condenser provided with the oil separation structure inside as described above, the part of the at least one inlet pipe extending into the separation chamber is bent into a curved pipe shape in a direction away from the first gas discharge port and the second gas discharge port.
In the condenser provided with the oil separation structure inside as described above, the separation chamber extends in the length direction of the shell, a cross section of the separation chamber parallel to a plane formed by the height direction and the width direction of the shell is substantially in a funnel shape, so that the separation chamber has an opening portion and a stalk portion, and a width dimension of the stalk portion is designed to be slightly larger than a diameter d of the at least one inlet pipe.
In the condenser provided with the oil separation structure inside as described above, the oil separation structure includes a housing, and the housing defines the separation chamber. The housing includes opposite side walls, opposite end walls, and an opposite top wall and bottom wall, which are connected to each other. The top wall abuts against a top inner surface of the shell, and upper parts of the opposite side walls are respectively provided with the first gas discharge port and the second gas discharge port. The at least a part of the vertical separation plates which block the upper fluid passage in the separation chamber extend at least a part of a height of the separation chamber from the top wall, and the at least another part of the vertical separation plates which block the lower fluid passage in the separation chamber extend at least a part of the height of the separation chamber from the bottom of the oil separation structure.
In the condenser provided with the oil separation structure inside as described above, the oil separation structure includes a housing, and the housing defines the separation chamber. The housing includes opposite side walls, opposite end walls, and a bottom wall, which are connected to each other. Tops of the opposite side walls and the opposite end walls abut against a top inner surface of the shell, and upper parts of the opposite side walls are respectively provided with the first gas discharge port and the second gas discharge port.
In the condenser provided with the oil separation structure inside as described above, the at least another part of the vertical separation plates which block the lower fluid passage in the separation chamber are spaced apart a certain distance from the bottom wall to define an oil guide channel.
In the condenser provided with the oil separation structure inside as described above, the bottom wall of the oil separation structure abuts against a bottom inner surface of the shell, and the at least one oil discharge port is disposed on the bottom wall. The condenser includes a first subcooling box and a second subcooling box located at a bottom of the accommodating cavity, and the first subcooling box and the second subcooling box are respectively located on two sides of the oil separation structure in the width direction of the shell.
In the condenser provided with an oil separation structure inside as described above, the condenser includes a subcooling box disposed at a bottom of the accommodating cavity, and the bottom wall of the oil separation structure abuts against the subcooling box. The oil separation structure further includes at least one oil storage cavity disposed at the bottom of the oil separation structure and communicating with a bottom of the separation chamber, and the at least one oil discharge port is disposed at a bottom of the corresponding at least one oil storage cavity. The at least one oil storage cavity is accommodated at a bottom of one of the first condensation chamber and the second condensation chamber.
According to another aspect of the present application, the present application provides a refrigeration and air conditioning system, including a condenser provided with an oil separation structure inside according to the present application.

Brief Description of the Drawings

FIG. 1a is a cross-sectional view of a condenser according to one embodiment of the present application.
FIG. 1b is a cross-sectional view of a condenser shown in FIG. 1a in a direction A-A.
FIG. 1c shows a housing of an oil separation structure in a condenser shown in FIG. 1b.
FIG. 2a is a cross-sectional view of a condenser according to another embodiment of the present application.
FIG. 2b is a cross-sectional view of a condenser shown in FIG. 2a in a direction B-B.
FIG. 3a is a cross-sectional view of a condenser according to yet another embodiment of the present application.
FIG. 3b is a cross-sectional view of a condenser shown in FIG. 3a in a direction C-C.

Detailed Description of Embodiments

Various specific embodiments of the present application will be described below with reference to the accompanying drawings, which constitute a part of the specification. It should be understood that, where possible, identical or similar reference numerals are used in the present application to refer to identical components. Although terms, such as "upper," "lower," "left," "right," "top," "bottom," etc., that represent directions are used in the present application to describe various example structural parts and elements of the present application, these terms used herein are determined based on example orientations shown in the accompanying drawings for ease of illustration only. Since the embodiments disclosed in the present application may be disposed in different directions, these terms that represent directions are for illustration only and should not be regarded as limiting.
FIG. 1a to FIG. 1c show a condenser 10a according to one embodiment of the present application. FIG. 1a is a cross-sectional view of a condenser 10a according to one embodiment of the present application. FIG. 1b is a cross-sectional view of a condenser 10a shown in FIG. 1a in a direction A-A. FIG. 1c shows a housing 202a of an oil separation structure 201a in a condenser 10a shown in FIG. 1b.
As shown in FIGS. 1a and 1b, the condenser 10a includes a shell 101 including a length direction, a width direction and a height direction as shown in FIG. 1a. The shell 101 defines an accommodating cavity 102. An oil separation structure 201a is fixed in the accommodating cavity 102, and extends in the length direction of the shell 101. In FIG. 1a, the oil separation structure 201a extends a length of the accommodating cavity 102. The oil separation structure 201a includes a separation chamber 203a.
As shown in FIG. 1b, the accommodating cavity 102 includes a first condensation chamber 104a and a second condensation chamber 105a which are separated by the oil separation structure 201a, and the first condensation chamber 104a and the second condensation chamber 105a are respectively located on two sides of the separation chamber 203a in the width direction of the shell 101, and respectively extend the length of the accommodating cavity 102. A plurality of condenser pipes 106 are respectively disposed in the first condensation chamber 104a and the second condensation chamber 105a for receiving a cooling fluid. As will be discussed in detail below, a refrigerant gas entering the first condensation chamber 104a and the second condensation chamber 105a from the separation chamber 203a exchanges heat with the cooling fluid in the condenser pipes 106 so that the refrigerant gas is cooled into a liquid refrigerant. In the embodiment shown in FIG. 1b, the separation chamber 203a is centrally arranged in the accommodating cavity 102 in the width direction of the shell 101. In some embodiments, the separation chamber 203a is non-centrally arranged in the accommodating cavity 102 in the width direction of the shell 101.
Subcooling boxes 107.1 and 107.2 are further disposed in the accommodating cavity 102 for further cooling the refrigerant cooled by the cooling fluid in the condenser pipes106. The refrigerant that finishes cooling is sent to a throttle valve of a refrigeration and air conditioning system. The subcooling boxes 107.1 and 107.2 are located on two sides of the oil separation structure 201a and are respectively accommodated in lower parts of the first condensation chamber 104a and the second condensation chamber 105a. The construction of this split-type subcooling box causes the oil separation structure 201a to abut against the bottom inner surface of the shell 101 of the condenser 10a (described in detail below), so that the separation chamber 203a extends the entire height of the shell 101. This enables a maximum flight height to be provided for the refrigerant entering the separation chamber 203a, thereby increasing a flight time of the refrigerant in the separation chamber 203a to improve a gravity separation effect, thus facilitating sufficient separation of lubricating oil. This also allows the separation chamber 203a to be designed with a smaller width, such that the two condensation chambers (first condensation chamber 104a and second condensation chamber 105a) have a larger space to arrange more condenser pipes 106, thereby providing a heat exchange capability of the condenser 10a.
The shell 101 is provided with two inlet pipes 301a communicating with a compressor (not shown in the figure) at positions close to two ends of the shell 101 to receive a refrigerant to be condensed (hereinafter referred to as "refrigerant") containing liquid lubricating oil from the compressor. The inlet pipes 301a extend into the separation chamber 203a, thereby sending the refrigerant received from the compressor into the separation chamber 203a to separate the liquid lubricating oil and the refrigerant gas in the refrigerant in the separation chamber 203a. As shown in FIG. 1a, parts of the inlet pipes 301a extending into the separation chamber 203a are bent into a curved pipe shape such that outlets 303a of the inlet pipes 301a respectively face two ends of the oil separation structure 201a. In some embodiments, as shown in FIG. 1b, the two inlet pipes 301a are both centrally arranged at the top of the shell 101 in the width direction of the shell 101. In some embodiments, the inlet pipes 301a may also be non-centrally arranged at the top of the shell 101 in the width direction of the shell 101. Although the number of the inlet pipes shown in FIG. 1a is two, it should be understood that in other embodiments, different numbers of inlet pipes 301a may be disposed. As an example, the number of the inlet pipe 301a is one.
The structure of the oil separation structure 201a is described in connection with FIGS. 1a to 1c. As shown in FIGS. 1a to 1c, the oil separation structure 201a includes a housing 202a that defines a separation chamber 203a. The housing 202a includes opposite side walls 204 and 205, opposite end walls 206 and 207, and an opposite top wall 208 and bottom wall 209a, and the side walls 204 and 205, the end walls 206 and 207, the top wall 208 and the bottom wall 209a are connected to each other to form the housing 202a.
As shown in FIGS. 1a and 1b, upper parts of the opposite side walls 204 and 205 are respectively provided with a first gas discharge port 210.1 and a second gas discharge port 210.2. The first gas discharge port 210.1 is in communication with the first condensation chamber 104a, and the second gas discharge port 210.2 is in communication with the second condensation chamber 105a, so that the refrigerant gas separated by the separation chamber 203a respectively enters the first condensation chamber 104a and the second condensation chamber 105a through the first gas discharge port 210.1 and the second gas discharge port 210.2 for condensing. The two inlet pipes 301a are bent away from the first gas discharge port 210.1 and the second gas discharge port 210.2, so that the outlets 303a of the two inlet pipes 301a each face a corresponding one of the end walls 206 and 207 of the oil separation structure 201a. In the embodiment of FIGS. 1a to 1c, the first gas discharge port 210.1 and the second gas discharge port 210.2 are disposed oppositely in middles of upper parts of the opposite side walls 204 and 205. In some embodiments where only one inlet pipe 301a is disposed, the inlet pipe 301a is disposed close to the end wall 206 or 207 that its outlet 303a faces, while the first gas discharge port 210.1 and the second gas discharge port 210.2 are disposed oppositely at the upper parts of the opposite side walls 204 and 205 close to the other of the end walls 206 and 207, so that the outlet 303a of the inlet pipe 301a is as far away as possible from the first gas discharge port 210.1 and the second gas discharge port 210.2, and thus the refrigerant has a sufficient flight distance in the separation chamber 203a to achieve separation of lubricating oil.
FIG. 1c shows that the bottom wall 209a is provided with an oil discharge port 214a. Although not shown in the figure, it should be understood that a corresponding position of the shell 101 of the condenser 10a has an outlet corresponding to the oil discharge port 214a so that the lubricating oil separated by the separation chamber 203a can be discharged through the oil discharge port 214a. In different embodiments, the numbers of oil discharge ports 214a may be different, and as an example, the number of oil discharge ports 214a may be one, two or more.
As shown in FIGS. 1b and 1c, a cross section of the separation chamber 203a parallel to a plane formed by the height and the width of the shell 101 is substantially in a funnel shape, so that the separation chamber 203a has an opening portion 221a and a stalk portion 222a. A width dimension W1 of the stalk portion 222a is designed to be slightly larger than a diameter d of the inlet pipe 301a, which makes the stalk portion 222a have as small as possible a width while facilitating the refrigerant entering the separation chamber 203a. The smallest possible width of the stalk portion 222a allows a flow speed of the refrigerant in the stalk portion 222a to be high, which facilitates impact separation and centrifugal separation of lubricating oil (discussed in detail below). The small width of the stalk portion 222a also enables the accommodating cavity 102 to provide more space for condensation. As shown in FIG. 1b, because the stalk portion 222a may have a very small width, the majority of the space in the accommodating cavity 102 is occupied by the first condensation chamber 104a and the second condensation chamber 105a. Thus, many condenser pipes can be disposed in the first condensation chamber 104a and the second condensation chamber 105a, thereby improving the heat exchange capability of the condenser 10a. The opening portion 221a gradually widens upward from the stalk portion 222a, thereby increasing in width upward from the stalk portion 222a. This reduces the flow speed of the refrigerant in the opening portion 221a, thereby increasing a flight time of the refrigerant in the separation chamber 203a to improve a gravity separation effect, thus facilitating sufficient separation of lubricating oil. As shown in FIGS. 1a and 1b, a filter mesh 241 is disposed in the opening portion 221a below the positions of the first gas discharge port 210.1 and the second gas discharge port 210.2 to further separate the lubricating oil from the refrigerant before the refrigerant leaves the separation chamber 203a and enters the first condensation chamber 104a and the second condensation chamber 105a. The design of the opening portion 221a gradually widens upward from the stalk portion 222a reduces the flow speed of the refrigerant as it passes through the filter mesh 241, allowing the filter mesh 241 to better capture and separate the lubricating oil from the refrigerant. In some embodiments, no filter mesh 241 is disposed in the opening portion 221a.
As shown in FIGS. 1a and 1b, the bottom wall 209a of the oil separation structure 201a abuts against the bottom inner surface of the shell 101, and the top wall 208 abuts against the top inner surface of the shell 101, so that the oil separation structure 201a is fixed in the accommodating cavity 102. The structure of the oil separation structure 201a makes the oil separation structure 201a easy to manufacture and can be easily fixed into the accommodating cavity 102. In some embodiments, the oil separation structure 201a is obtained by bending and/or connecting an appropriate material. The manufactured oil separation structure 201a is pushed into the accommodating cavity 102 of the condenser 10a to abut against the bottom and top inner surfaces of the shell 101 of the condenser 10a to be easily fixed in the accommodating cavity 102. In some embodiments, the oil separation structure 201a is constructed to have no top wall 208. In this embodiment, the side walls 204 and 205 and the end walls 206 and 207 of the oil separation structure 201a are directly connected to the top inner surface of the shell 101.
Vertical separation plates 211 and 212 are disposed in the separation chamber 203a to block the flow of the refrigerant in the separation chamber 203a, thereby facilitating the separation of the lubricating oil in the refrigerant. The disposing of the vertical separation plates 211 and 212 is described in connection with FIGS. 1a and 1b. The vertical separation plates 211 and 212 are each arranged transversely to an extension direction of the separation chamber 203a and respectively abut against opposite side walls 204 and 205 of the oil separation structure 201a. The vertical separation plate 211 extends partial height of the separation chamber 203a downward from the top wall 208 of the oil separation structure 201a, and is configured to block an upper fluid passage in the separation chamber 203a. The vertical separation plate 212 extends partial height of the separation chamber 203a upward from the bottom of the oil separation structure 201a, blocking a lower fluid passage in the separation chamber 203a. As shown in FIG. 1a, the vertical separation plates 211 and 212 on one side of the positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located are alternately arranged in the length direction of the shell 101. Distances of the vertical separation plates 211 and 212 in the length direction of the shell 101 and a distance between the vertical separation plate 211 and the end wall 206 or 207 of the oil separation structure 201a are designed so that an oil separation effect meeting requirements can be obtained. In some embodiments, the sum of heights of the vertical separation plate 211 and the vertical separation plate 212 is smaller than the height of the separation chamber 203a. In other embodiments, the sum of the heights of the vertical separation plate 211 and the vertical separation plate 212 is equal to the height of the separation chamber 203a. In yet other embodiments, the sum of the heights of the vertical separation plate 211 and the vertical separation plate 212 is greater than the height of the separation chamber 203a.
As shown in FIG. 1b, in the embodiment of FIGS. 1a to 1c, the vertical separation plate 212 is spaced apart a certain distance from the bottom wall 209a of the oil separation structure 201a, thereby defining an oil guide channel 219a between the vertical separation plate 212 and the bottom wall 209a of the oil separation structure 201a, and the oil guide channel 219a communicates with the oil discharge port 214a. The lubricating oil separated in the separation chamber 203a falls into the oil guide channel 219a and flows to the oil discharge port 214a to flow out through the oil discharge port 214a and be returned to the compressor. The oil guide channel 219a allows only one oil discharge port 214a to be disposed on the bottom wall 209a of the oil separation structure 201a. In some embodiments, the vertical separation plate 212 extends upward from the bottom wall 209a of the oil separation structure 201a so that there is no oil guide channel 219a. In this way, in these embodiments, a plurality of oil discharge ports 214a are disposed on the bottom wall 209a of the oil separation structure 201a, and are respectively distributed between the vertical separation plates 212 and between the vertical separation plates 212 and the end wall 206 or 207 of the oil separation structure 201a.
As shown in FIG. 1a, in the embodiment of FIGS. 1a to 1c, one vertical separation plate 211 and one vertical separation plate 212 are respectively disposed on one side of the positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located. The vertical separation plate 211 is close to the inlet pipe 301a and is located on a side of the inlet pipe 301a opposite to the outlet 303a. The vertical separation plate 212 is located between the vertical separation plate 211 and the positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located in the length direction of the shell 101. In other embodiments, different numbers of vertical separation plates 211 and 212 are disposed in the separation chamber 203a.
A process of separating lubricating oil and a refrigerant gas from the refrigerant entering the oil separation chamber 203a from the inlet pipe 301a located on a right side shown in FIG. 1a is described below with reference to FIG. 1a. It should be understood that a process of separating lubricating oil and a refrigerant gas from the refrigerant entering the separation chamber 203a from the inlet pipe 301a located on a left side in FIG. 1a is similar.
As shown in FIG. 1a, the refrigerant is discharged from the outlet 303a of the inlet pipe 301a and then flows toward the end wall 207 of the oil separation structure 201a and hits the end wall 207. Through hitting, part of the lubricating oil in the refrigerant is separated, and the separated lubricating oil is dripped into the oil guide channel 219a at the bottom of the separation chamber 203a. The remaining refrigerant returns after hitting the end wall 207 as a first hit-separated refrigerant, and a part of the first hit-separated refrigerant flows towards the vertical separation plate 211, and a part of the first hit-separated refrigerant flows towards the vertical separation plate 212. The part of the first hit-separated refrigerant that flows towards the vertical separation plate 211 hits the vertical separation plate 211, the hitting causes a part of lubricating oil in the part of the first hit-separated refrigerant to be separated and dripped into the oil guide channel 219a, and the remaining refrigerant continues to flow towards the first gas discharge port 210.1 and the second gas discharge port 210.2 as a second hit-separated refrigerant. Since the flow of the second hit-separated refrigerant is blocked by the vertical separation plate 211, the second hit-separated refrigerant changes a flow direction to bypass the blocking of the vertical separation plate 211. This change in the movement direction causes the second hit-separated refrigerant to rotate around the vertical separation plate 211. A centrifugal force generated by the rotation further causes lubricating oil in the second hit-separated refrigerant to be centrifugally separated, so that the lubricating oil is dripped into the oil guide channel 219a. The remaining refrigerant continues to flow towards the first gas discharge port 210.1 and the second gas discharge port 210.2 as a first centrifugally separated refrigerant, and respectively enters the first condensation chamber 104a and the second condensation chamber 105a through the first gas discharge port 210.1 and the second gas discharge port 210.2. The part of the first hit-separated refrigerant that flows towards the vertical separation plate 212 hits the vertical separation plate 212, the hitting causes a part of lubricating oil in the part of the first hit-separated refrigerant to be separated and dripped into the oil guide channel 219a, and the remaining refrigerant continues to flow towards the first gas discharge port 210.1 and the second gas discharge port 210.2 as a third hit-separated refrigerant. Since the flow of the third hit-separated refrigerant is blocked by the vertical separation plate 212, the third hit-separated refrigerant changes a flow direction to bypass the blocking of the vertical separation plate 212. This change in the movement direction causes the third hit-separated refrigerant to rotate around the vertical separation plate 212 during flowing. A centrifugal force generated by the rotation further causes lubricating oil in the third hit-separated refrigerant to be centrifugally separated, so that the lubricating oil is dripped into the oil guide channel 219a. The remaining refrigerant continues to flow towards the first gas discharge port 210.1 and the second gas discharge port 210.2 as a second centrifugally separated refrigerant, and respectively enters the first condensation chamber 104a and the second condensation chamber 105a through the first gas discharge port 210.1 and the second gas discharge port 210.2. In addition, because the separation chamber 203a according to the present application provides a sufficient flight height for the refrigerant, the lubricating oil in the refrigerant is further separated from the refrigerant gas based on gravity during a flight process of the refrigerant entering the separation chamber 203a from the outlet 303a of the inlet pipe 301a to leaving the separation chamber 203a. The gravity-separated lubricating oil also falls into the oil guide channel 219a. The lubricating oil dripped into the oil guide channel 219a is discharged through the oil discharge port 214a to be returned to the compressor. In some embodiments, when the vertical separation plates 211 on two sides of the first gas discharge port 210.1 and the second gas discharge port 210.2 are close to each other, the refrigerant reaching below the first gas discharge port 210.1 and the second gas discharge port 210.2 generates a vortex between the two vertical separation plates 211, and a centrifugal force generated by the vortex further causes part of the lubricating oil to be separated and fall into the oil guide channel 219a. As described above, in the separation chamber 203a, the lubricating oil and the refrigerant gas in the refrigerant undergo hit separation, centrifugal separation and gravity separation. There are various separation methods simultaneously so that the present application provides sufficient oil separation for the refrigerant.
FIGS. 2a to 2b show a condenser 10b according to another embodiment of the present application. FIG. 2a is a cross-sectional view of a condenser 10b according to another embodiment of the present application. FIG. 2b is a cross-sectional view of a condenser 10b shown in FIG. 2a in a direction B-B.
The condenser 10b of the embodiment shown in FIGS. 2a to 2b is similar to the condenser 10a of the embodiment shown in FIGS. 1a to 1c, with the differences being a change in construction of an oil separation structure and resulting changes in a first condensation chamber and a second condensation chamber, as well as different arrangements of vertical separation plates. For the sake of brevity of description, the following only describes the differences between the condenser 10b and the condenser 10a.
As shown in FIGS. 2a and 2b, an oil separation structure 201b is disposed in an accommodating cavity of the condenser 10b. The oil separation structure 201b includes a separation chamber 203b. Unlike the oil separation structure 201a, the oil separation structure 201b has no top wall. Therefore, opposite side walls and opposite end walls of the oil separation structure 201b are directly connected to an inner surface of a shell of the condenser 10b. It should be understood that in some embodiments, the oil separation structure 201b is also designed to have a top wall 208. An integrated subcooling box 107 is disposed at a bottom of the accommodating cavity of the condenser 10b. A bottom wall 209b of the oil separation structure 201b abuts against the subcooling box 107. Therefore, a height of the separation chamber 203b is smaller than that of the separation chamber 203a. A stalk portion of the separation chamber 203b has a width W2. Considering a reduced flight height of a refrigerant in the separation chamber 203b due to the height of the separation chamber 203b being smaller than that of the separation chamber 203a, and a resulting reduction in a flight time, the width W2 of the stalk portion of the separation chamber 203b is designed to be slightly larger than the width W1 of the stalk portion of the separation chamber 203a, which causes a flight speed of the refrigerant in the separation chamber 203b to be slightly reduced, thereby increasing the flight time of the refrigerant in the separation chamber 203b and reducing a pressure loss during a flight process. The flight time provides a gravity separation effect of the refrigerant in the separation chamber 203b, while the reduced pressure loss is conducive to hit separation and centrifugal separation of the refrigerant, thereby facilitating the full separation of lubricating oil. An oil storage cavity 215 is disposed at the bottom of the oil separation structure 201b, and is accommodated in the second condensation chamber 105b. The oil storage cavity 215 is in communication with an oil guide channel 219b at the bottom of the oil separation structure 201b to collect the separated lubricating oil from the separation chamber 203b. An oil discharge port 214b is disposed at the bottom of the oil storage cavity 215 to discharge the lubricating oil collected by the oil storage cavity 215 to a compressor. Since the oil storage cavity 215 occupies part of a space of the second condensation chamber 105b, in a refrigeration and air conditioning system using the oil separation structure 201b according to the embodiment, the amount of the refrigerant charged may be reduced.
Compared with the embodiment of FIGS. 1a to 1c, in the embodiment of FIGS. 2a to 2b, a vertical separation plate 213 is added on one side close to positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located, and the vertical separation plate 213 has a similar arrangement to the vertical separation plate 211. As shown in FIG. 2a, on one side of the positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located, two vertical separation plates 211 and 213 are disposed to block an upper fluid passage in the separation chamber 203b, and a vertical separation plate 212 is disposed to block a lower fluid passage in the separation chamber 203b. The vertical separation plate 211 is close to an inlet pipe 301a and is located on a side opposite to an outlet 303a of the inlet pipe 301a. The vertical separation plate 213 is close to the positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located. The vertical separation plate 212 is located between the vertical separation plates 211 and 213 in the length direction of the shell of the condenser. It should be understood that since the oil separation structure 201b in the embodiment of FIGS. 2a to 2b has no top wall, the vertical separation plates 211 and 213 in the embodiment of FIGS. 2a to 2b extend downward from a top inner surface of the shell of the condenser 10b. It should be understood that in other embodiments, different numbers of vertical separation plates 211 and 212 are disposed in the separation chamber 203b.
The partial separation process of the refrigerant in the separation chamber 203b is similar to the separation process in the separation chamber 203a. Specifically, as in the separation process in the separation chamber 203a, a first centrifugally separated refrigerant and a second centrifugally separated refrigerant are obtained after the refrigerant entering the separation chamber 203b passes through the vertical separation plates 211 and 212. Unlike in the separation chamber 203a, since the separation chamber 203b adds the vertical separation plate 213 at the positions close to the first gas discharge port 210.1 and the second gas discharge port 210.2 compared with the separation chamber 203a, the first centrifugally separated refrigerant and the second centrifugally separated refrigerant are further separated based on blocking of the vertical separation plate 213 before reaching the first gas discharge port 210.1 and the second gas discharge port 210.2. Specifically, the first centrifugally separated refrigerant and the second centrifugally separated refrigerant flow towards the vertical separation plate 213 and hit the vertical separation plate 213. The lubricating oil separated by hitting is dripped into the oil guide channel 219b, and the remaining refrigerant continues to flow towards the first gas discharge port 210.1 and the second gas discharge port 210.2 as a fourth hit-separated refrigerant. Since the flow of the fourth hit-separated refrigerant is blocked by the vertical separation plate 213, the fourth hit-separated refrigerant changes a flow direction to bypass the blocking of the vertical separation plate 213. This change in the movement direction causes the fourth hit-separated refrigerant to rotate around the vertical separation plate 213 during flowing. A centrifugal force generated by the rotation further causes lubricating oil in the fourth hit-separated refrigerant to be centrifugally separated, so that the lubricating oil is dripped into the oil guide channel 219b. The remaining refrigerant continues to flow towards the first gas discharge port 210.1 and the second gas discharge port 210.2 as a third centrifugally separated refrigerant. Since two sides of the first gas discharge port 210.1 and the second gas discharge port 210.2 are both provided with vertical separation plates 213 close to these two gas discharge ports, under the action of the two vertical separation plates 213 close to each other, the third centrifugally separated refrigerant forms a vortex below the positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located. Based on a centrifugal force generated by the vortex, part of lubricating oil in the third centrifugally separated refrigerant is further centrifugally separated below the positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located, and falls into the oil guide channel 219b. The remaining refrigerant respectively enters the first condensation chamber 104b and the second condensation chamber 105b as a fourth centrifugally separated refrigerant through the first gas discharge port 210.1 and the second gas discharge port 210.2. Like in the separation chamber 203a, the lubricating oil also undergoes gravity separation during a process of the refrigerant flowing towards the first gas discharge port 210.1 and the second gas discharge port 210.2 in the separation chamber 203b. In some embodiments, when a distance between the vertical separation plates 211 and 213 is small, the refrigerant that reaches between the vertical separation plates 211 and 213 generates a vortex between the vertical separation plates 211 and 213, and a centrifugal force generated by the vortex further causes part of the lubricating oil to be separated and fall into the oil guide channel 219b. As described above, in the separation chamber 203b, the lubricating oil and the refrigerant gas in the refrigerant undergo hit separation, centrifugal separation and gravity separation. There are various separation methods simultaneously so that the present application provides sufficient oil separation for the refrigerant.
FIGS. 3a to 3b show a condenser 10c according to yet another embodiment of the present application. FIG. 3a is a cross-sectional view of a condenser 10c according to yet another embodiment of the present application. FIG. 3b is a cross-sectional view of a condenser 10c shown in FIG. 3a in a direction C-C.
The condenser 10c and an oil separation structure 201c therein in the embodiment shown in FIGS. 3a to 3b are respectively similar to the condenser 10b and the oil separation structure 201b in the embodiment shown in FIGS. 2a to 2b, with the difference being the construction of an inlet pipe and the arrangement of a separation plate in a separation chamber. For the sake of brevity of description, the following only describes the differences between the condenser 10c and the condenser 10b.
As shown in FIGS. 3a and 3b, the condenser 10c includes an inlet pipe 301c, which unlike the inlet pipe 301a, a part of the inlet pipe 301c extending into a separation chamber 203c is a straight pipe, thus having a downward-facing outlet 303c.
Continuing to refer to FIGS. 3a and 3b, vertical separation plates 217 and 218 are disposed in the separation chamber 203c of the oil separation structure 201c. The vertical separation plate 217 has a similar arrangement to the vertical separation plate 211, and the vertical separation plate 218 has a similar arrangement to the vertical separation plate 212. The vertical separation plate 217 is configured to block an upper airflow passage in the separation chamber 203c, and the vertical separation plate 218 is configured to block a lower airflow passage in the separation chamber 203c. Since the oil separation structure 201c is the same as the oil separation structure 201b and also has no top wall, the vertical separation plate 217 in the embodiment of FIGS. 3a to 3b extends downward from a top inner surface of a shell of the condenser 10c. In other embodiments, different numbers of vertical separation plates 217 and 218 are disposed in the separation chamber 203c.
A transverse separation plate 231 is also disposed in the separation chamber 203c. The transverse separation plate 231 is arranged transversely to an extension direction of the separation chamber 203c and abuts against two side walls of the oil separation structure 201c, and the transverse separation plate 231 is located below the corresponding inlet pipe 301c and faces the outlet 303c of the inlet pipe 301c. On one side of positions where the first gas discharge port 210.1 and the second gas discharge port 210.2 are located, the vertical separation plate 218 is located between the vertical separation plate 217 and the transverse separation plate 231. Although not shown in the figure, it should be understood that the arrangements of the inlet pipe 301c and the separation plates in this embodiment may also be applied to the embodiments of FIGS. 1a to 1c and FIGS. 2a to 2b to replace the arrangements of the inlet pipes and the separation plates therein.
A process of separating lubricating oil and a refrigerant gas from a refrigerant entering the oil separation chamber 203c from the inlet pipe 301c located on a right side shown in FIG. 3a is described below with reference to FIG. 3a. It should be understood that a process of separating lubricating oil and a refrigerant gas from a refrigerant entering the separation chamber 203c from the inlet pipe 301c located on a left side in FIG. 3a is similar.
As shown in FIG. 3a, the refrigerant is discharged from the outlet 303c of the inlet pipe 301c and then flows toward the transverse separation plate 231 and hits the transverse separation plate 231. By hitting, part of the lubricating oil in the refrigerant is separated, and the separated lubricating oil is dripped into the oil guide channel 219b at the bottom of the separation chamber 203c. The remaining refrigerant continues to flow in the separation chamber 203c as a first hit-separated refrigerant. A part of the first hit-separated refrigerant flows towards the vertical separation plate 217 and hits the vertical separation plate 217, the hitting causes a part of lubricating oil in the part of the first hit-separated refrigerant to be separated and dripped into the oil guide channel 219b, and the remaining refrigerant continues to flow towards the first gas discharge port 210.1 and the second gas discharge port 210.2 as a second hit-separated refrigerant. Since the flow of the second hit-separated refrigerant is blocked by the vertical separation plate 217, the second hit-separated refrigerant rotates around the vertical separation plate 217 during flowing to change a direction to bypass the blocking of the vertical separation plate 217. A centrifugal force generated by the rotation further causes lubricating oil in the second hit-separated refrigerant to be centrifugally separated, so that the lubricating oil is dripped into the oil guide channel 219a. The remaining refrigerant, as a first centrifugally separated refrigerant, respectively enters condensation chambers on two sides of the separation chamber 203c for cooling through the first gas discharge port 210.1 and the second gas discharge port 210.2. A part of the first hit-separated refrigerant flows towards the vertical separation plate 218 and hits the vertical separation plate 218, the hitting causes a part of lubricating oil in the part of the first hit-separated refrigerant to be separated and dripped into the oil guide channel 219b, and the remaining refrigerant continues to flow towards the first gas discharge port 210.1 and the second gas discharge port 210.2 as a third hit-separated refrigerant. Since the flow of the third hit-separated refrigerant is blocked by the vertical separation plate 218, the third hit-separated refrigerant rotates around the vertical separation plate 218 during flowing to change a direction to bypass the blocking of the vertical separation plate 218. A centrifugal force generated by the rotation further causes lubricating oil in the third hit-separated refrigerant to be centrifugally separated, so that the lubricating oil is dripped into the oil guide channel 219b. The remaining refrigerant, as a second centrifugally separated refrigerant, respectively enters the condensation chambers on the two sides of the separation chamber 203c for cooling through the first gas discharge port 210.1 and the second gas discharge port 210.2. In addition, a part of the first hit-separated refrigerant flows towards the end wall 207 and hits the end wall 207. The hitting causes a part of lubricating oil in the part of the first hit-separated refrigerant to be separated and dripped into the oil guide channel 219b at the bottom of the separation chamber 203c, the remaining refrigerant, as a fourth hit-separated refrigerant, changes a direction and flows towards the first gas discharge port 210.1 and the second gas discharge port 210.2, and hit and centrifugal separation further occurs at the vertical separation plates 217 and 218. Like in the separation chambers 203a and 203b, the lubricating oil also undergoes gravity separation during a process of the refrigerant flowing towards the first gas discharge port 210.1 and the second gas discharge port 210.2 in the separation chamber 203c. In some embodiments, when the vertical separation plates 217 on two sides of the first gas discharge port 210.1 and the second gas discharge port 210.2 are close to each other, the refrigerant reaching the first gas discharge port 210.1 and the second gas discharge port 210.2 generates a vortex between the two vertical separation plates 217, and a centrifugal force generated by the vortex further causes a part of the lubricating oil to be separated and fall into the oil guide channel 219b. As described above, in the separation chamber 203c, the lubricating oil and the refrigerant gas in the refrigerant undergo hit separation, centrifugal separation and gravity separation. There are various separation methods simultaneously so that the present application provides sufficient oil separation.
The embodiments according to the present application have at least the following technical effects.

1. The oil separation structure used in the present application provides various separation methods, including hit separation, centrifugal separation and gravity separation, so the oil separation structure of the present application can provide sufficient oil separation.
2. Due to the construction of the oil separation structure of the present application and the excellent oil separation effect provided by it, it is not required that the oil separation structure provides a large separation chamber for oil separation. The vertical separation plates disposed in the separation chamber of the present application form blocking as the refrigerant flows towards the first and second discharge ports, thereby reducing the flow speed of the refrigerant in the separation chamber and ensuring that the refrigerant has sufficient time to fly in the separation chamber for completing oil separation. Therefore, the oil separation structure of the present application is designed to have a small-size separation chamber. The small size of the oil separation structure of the present application allows a large part of the accommodating cavity of the condenser to be used as the condensation chamber, thereby improving the heat exchange capability of the condenser. Specifically, as stated above, the width dimension of the stalk portion of the separation chamber is designed to be slightly larger than the diameter of the inlet pipe, which makes the stalk portion have a very small width. Thus, in the present application, the oil separation structure occupies only a very small part of the accommodating cavity of the condenser, which allows the accommodating cavity of the condenser to provide a very large space for condensation. Thus, in the present application, most of the space of the accommodating cavity of the condenser is occupied by the two condensation chambers on two sides of the oil separation structure. This allows for disposing many condenser pipes in the two condensation chambers without increasing the dimension of the condenser, thereby ensuring the heat exchange capability of the condenser. Conversely, if no vertical separation plate is disposed in the separation chamber, in order to ensure sufficient time for the refrigerant to fly in the separation chamber to complete oil separation, the separation chamber needs to be designed to have a large dimension to reduce the flight speed of the refrigerant in the separation chamber. In this case, since the separation chamber occupies a lot of space of the accommodating cavity of the condenser, only a small part of the accommodating cavity of the condenser can be used as a condensation chamber to accomplish the condensation of the refrigerant gas, thereby reducing the heat exchange capability of the condenser.
3. The present application utilizes the oil separation structure to provide the accommodating cavity of the condenser with two condensation chambers located on two sides of the separation chamber, thereby improving heat exchange efficiency. Specifically, assuming the oil separation structure is disposed on one side of the accommodating cavity, such that the accommodating cavity includes the separation chamber and a single condensation chamber, a dimension of the hypothetical single condensation chamber is larger than that of either of the two condensation chambers according to the present application in the width direction of the shell of the condenser. Thus, the hypothetical single condensation chamber will be provided with a greater number of condenser pipes inside than either of the two condensation chambers according to the present application. This results in more resistance to the flow of the refrigerant gas to be cooled entering the hypothetical single condensation chamber towards a condenser pipe located in the middle of the hypothetical single condensation chamber, making it more difficult to reach the condenser pipe located in the middle of the hypothetical single condensation chamber, and thus difficult to exchange heat with a cooling fluid in the condenser pipe located in the middle of the hypothetical single condensation chamber to achieve cooling. Therefore, assuming that the oil separation structure is disposed on one side of the accommodating cavity such that the accommodating cavity includes a separation chamber and a single condensation chamber, the heat exchange efficiency of the condenser will be compromised. In contrast, the oil separation structure of the present application makes the accommodating cavity of the condenser include two condensation chambers located on two sides of the oil separation structure, so that each condensation chamber is provided with a smaller number of condenser pipes, and thus the refrigerant gas to be cooled entering each condensation chamber can easily reach the condenser pipes located in the middles of the two condensation chambers to achieve heat exchange with the cooling fluids in these condenser pipes, thereby facilitating the improvement of heat exchange efficiency.
4. When the separation chamber is centrally arranged in the accommodating cavity of the condenser in the width direction of the shell of the condenser, the two condensation chambers on two sides of the separation chamber have the same dimension. Therefore, neither the dimensions of the two condensation chambers in the width direction of the shell of the condenser are too large, so that in the width direction of the shell, both condensation chambers are provided with an appropriate number of condenser pipes. This further facilitates the refrigerant gas to be cooled entering each condensation chamber easily reaching the condenser pipes located in the middle of each condensation chamber, that is, further facilitates the improvement of heat exchange efficiency.
5. When the inlet pipe is centrally arranged at the top of the shell in the width direction of the shell of the condenser and the separation chamber is centrally arranged in the accommodating cavity of the condenser in the width direction of the shell of the condenser, the refrigerant has the maximum flight height after entering the separation chamber, so the refrigerant has a longest flight time in the separation chamber, which further facilitates sufficient separation of lubricating oil in the refrigerant in the separation chamber.
6. The funnel-shaped construction of the separation chamber of the present application makes the refrigerant have a larger flow speed at the stalk portion of the separation chamber to facilitate hit separation and centrifugal separation of the lubricating oil through the vertical separation plate, and the opening portion of the separation chamber has a reduced flow speed, so that the flight time of the refrigerant at the opening portion is increased to facilitate gravity separation of the lubricating oil. Meanwhile, in the embodiment where the filter mesh is used in conjunction, the reduction of the flow speed of the refrigerant at the opening portion of the separation chamber facilitates further capture and separation of the lubricating oil by the filter mesh.

Although the present disclosure has been described in conjunction with the examples of embodiments outlined above, various alternatives, modifications, variations, improvements and/or substantial equivalents, whether known or foreseeable now or soon, may become apparent to those of ordinary skill in the art. In addition, the technical effects and/or technical problems described in this specification are exemplary rather than restrictive. Therefore, the disclosures in this specification may be used to solve other technical problems and have other technical effects and/or can solve other technical problems. Accordingly, the examples of embodiments of the present disclosure set forth above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Accordingly, the present disclosure is intended to embrace all known or earlier developed alternatives, modifications, variations, improvements and/or substantial equivalents.

Claims

A condenser provided with an oil separation structure inside, comprising:
a shell (101), wherein the shell (101) defines an accommodating cavity (102), the shell (101) is provided with at least one inlet pipe (301a, 301c) for receiving a refrigerant to be condensed containing lubricating oil, and the shell (101) comprises a length direction, a height direction, and a width direction; and

the oil separation structure (201a, 201b, 201c), wherein the oil separation structure (201a, 201b, 201c) is fixed in the accommodating cavity (102), the oil separation structure (201a, 201b, 201c) comprises a separation chamber (203a, 203b, 203c), and the at least one inlet pipe (301a, 301c) extends into the separation chamber (203a, 203b, 203c), wherein the separation chamber (203a, 203b, 203c) is configured to separate the lubricating oil and a refrigerant gas in the refrigerant;

wherein the accommodating cavity (102) comprises a first condensation chamber (104a, 104b) and a second condensation chamber (105a, 105b) which are separated by the oil separation structure (201a, 201b, 201c), and the first condensation chamber (104a, 104b) and the second condensation chamber (105a, 105b) are respectively located on two sides of the separation chamber (203a, 203b, 203c) in the width direction of the shell (101), and respectively extend in the length direction of the shell (101); and

wherein an upper part of the oil separation structure (201a, 201b, 201c) is provided with a first gas discharge port (210.1) and a second gas discharge port (210.2) which respectively make the first condensation chamber (104a, 104b) and the second condensation chamber (105a, 105b) in fluid communication with the separation chamber (203a, 203b, 203c), so that the refrigerant gas separated by the separation chamber (203a, 203b, 203c) can enter the first condensation chamber (104a, 104b) and the second condensation chamber (105a, 105b) to be condensed, and a bottom of the oil separation structure (201a, 201b, 201c) is provided with at least one oil discharge port (214a, 214b), so that the lubricating oil separated by the separation chamber (203a, 203b, 203c) can be discharged from the separation chamber (203a, 203b, 203c).
The condenser provided with the oil separation structure inside according to claim 1, wherein:
the separation chamber (203 a, 203b, 203c) is centrally arranged in the accommodating cavity (102) in the width direction of the shell (101).
The condenser provided with the oil separation structure inside according to claim 2, wherein:
the oil separation structure (201a, 201b, 201c) comprises a plurality of vertical separation plates (211, 212, 213, 217, 218) disposed in the separation chamber (203a, 203b, 203c) at intervals in the length direction of the shell (101), and the plurality of vertical separation plates (211, 212, 213, 217, 218) are each arranged transversely to an extension direction of the separation chamber (203 a, 203b, 203c), wherein at least a part of the plurality of vertical separation plates (211, 213, 217) are disposed to block an upper fluid passage in the separation chamber (203a, 203b, 203c), and at least another part of the plurality of vertical separation plates (212, 218) are disposed to block a lower fluid passage in the separation chamber (203 a, 203b, 203c).
The condenser provided with the oil separation structure inside according to claim 3, wherein:
on one side of the first gas discharge port (210.1) and the second gas discharge port (210.2), the at least a part of the vertical separation plates (211, 213, 217) which block the upper fluid passage in the separation chamber (203a, 203b, 203c) and the at least another part of the vertical separation plates (212, 218) which block the lower fluid passage in the separation chamber (203a, 203b, 203c) are alternately arranged.
The condenser provided with the oil separation structure inside according to claim 4, wherein:
the at least one inlet pipe (301a, 301c) is centrally arranged at a top of the shell (101) in the width direction of the shell (101).
The condenser provided with the oil separation structure inside according to claim 5, wherein:
a part of the at least one inlet pipe (301c) extending into the separation chamber (203c) extends in the height direction of the shell (101); and

the oil separation structure (201c) further comprises a transverse separation plate (231) located below the at least one inlet pipe (301c).
The condenser provided with the oil separation structure inside according to claim 5, wherein:
a part of at least one inlet pipe (301a) extending into the separation chamber (203a, 203b) is bent into a curved pipe shape in a direction away from the first gas discharge port (210.1) and the second gas discharge port (210.2).
The condenser provided with the oil separation structure inside according to claim 5, wherein:
the separation chamber (203a, 203b, 203c) extends in the length direction of the shell (101), a cross section of the separation chamber (203a, 203b, 203c) parallel to a plane formed by the height direction and the width direction of the shell (101) is substantially in a funnel shape, so that the separation chamber (203a, 203b, 203c) has an opening portion (221a) and a stalk portion (222a), and a width dimension (W1, W2) of the stalk portion (222a) is designed to be slightly larger than a diameter d of the at least one inlet pipe (301a, 301c).
The condenser provided with the oil separation structure inside according to claim 4, wherein:
the oil separation structure (201a) comprises a housing (202a), the housing (202a) defines the separation chamber (203a), the housing (202a) comprises opposite side walls (204, 205), opposite end walls (206, 207), and an opposite top wall (208) and bottom wall (209a), which are connected to each other, the top wall (208) abuts against a top inner surface of the shell (101), and upper parts of the opposite side walls (204, 205) are respectively provided with the first gas discharge port (210.1) and the second gas discharge port (210.2); and

the at least a part of the vertical separation plates (211) which block the upper fluid passage in the separation chamber (203a) extend at least a part of a height of the separation chamber (203a) from the top wall (208), and the at least another part of the vertical separation plates (212) which block the lower fluid passage in the separation chamber (203a) extend at least a part of the height of the separation chamber (203a) from the bottom of the oil separation structure (201a).
The condenser provided with the oil separation structure inside according to claim 4, wherein:
the oil separation structure (201b, 201c) comprises a housing, the housing defines the separation chamber (203b, 203c), the housing comprises opposite side walls (204, 205), opposite end walls (206, 207), and a bottom wall (209b), which are connected to each other, tops of the opposite side walls (204, 205) and the opposite end walls (206, 207) abut against a top inner surface of the shell (101), and upper parts of the opposite side walls (204, 205) are respectively provided with the first gas discharge port (210.1) and the second gas discharge port (210.2); and

the at least a part of the vertical separation plates (211, 213, 217) which block the upper fluid passage in the separation chamber (203b, 203c) extend at least a part of a height of the separation chamber (203b, 203c) from the top inner surface of the shell (101) of the condenser, and the at least another part of the vertical separation plates (212, 218) which block the lower fluid passage in the separation chamber (203b, 203c) extend at least a part of the height of the separation chamber (203b, 203c) from the bottom of the oil separation structure (201b, 201c).
The condenser provided with the oil separation structure inside according to claim 9 or 10, wherein:
the at least another part of the vertical separation plates (212, 218) which block the lower fluid passage in the separation chamber (203a, 203b, 203c) are spaced apart a certain distance from the bottom wall (209a, 209b) to define an oil guide channel (219a, 219b).
The condenser provided with the oil separation structure inside according to claim 9 or 10, wherein:
the bottom wall (209a) of the oil separation structure (201a) abuts against a bottom inner surface of the shell (101), and the at least one oil discharge port (214a) is disposed on the bottom wall (209a); and

the condenser comprises a first subcooling box (107.1) and a second subcooling box (107.2) located at a bottom of the accommodating cavity (102), and the first subcooling box (107.1) and the second subcooling box (107.2) are respectively located on two sides of the oil separation structure (201a) in the width direction of the shell (101).
The condenser provided with the oil separation structure inside according to claim 9 or 10, wherein:
the condenser comprises a subcooling box (107) disposed at a bottom of the accommodating cavity (102), and the bottom wall (209b) of the oil separation structure (201b, 201c) abuts against the subcooling box (107); and

the oil separation structure (201b, 201c) further comprises at least one oil storage cavity (215) disposed at the bottom of the oil separation structure (201b, 201c) and communicating with a bottom of the separation chamber (203b, 203c), and the at least one oil discharge port (214b) is disposed at a bottom of the corresponding at least one oil storage cavity (215), wherein the at least one oil storage cavity (215) is accommodated at a bottom of one of the first condensation chamber (104) and the second condensation chamber (105).
A refrigeration and air conditioning system, wherein:
the refrigeration and air conditioning system comprises the condenser provided with the oil separation structure inside according to any one of claims 1 to 13.